CN117441381A

CN117441381A - Method and device for notifying information change, terminal equipment and network equipment

Info

Publication number: CN117441381A
Application number: CN202180099082.8A
Authority: CN
Inventors: 王淑坤
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2024-01-23
Also published as: WO2023010287A1

Abstract

The embodiment of the application provides a method and a device for notifying information change, terminal equipment and network equipment, wherein the method comprises the following steps: the terminal equipment receives a first signaling, wherein the first signaling carries first indication information, and the first indication information is used for indicating at least one of the following: whether the terminal equipment monitors the DCI or not; whether the terminal equipment monitors MCCH DCI; whether the terminal equipment reacquires the MCCH signaling; the MCCH change notification DCI is used to notify MCCH change, the MCCH DCI is used to schedule MCCH, the MCCH is used to carry MCCH signaling, and the MCCH signaling includes one or more multi-MBS configurations.

Description

Method and device for notifying information change, terminal equipment and network equipment

Technical Field

The embodiment of the application relates to the technical field of mobile communication, in particular to a method and a device for notifying information change, terminal equipment and network equipment.

Background

The MBS configuration of all multimedia broadcast services (Multimedia Broadcast Service, MBS) services broadcasted by one cell is configured by one multicast control channel (Multicast Control Channel, MCCH) signaling. The MBS configuration of any MBS service changes and the content in the MCCH signaling is updated. In the case of MCCH signaling update, all terminal devices need to reacquire MCCH signaling, and even if MBS configuration of MBS services to which some terminal devices join is not changed, the terminal devices need to reacquire MCCH signaling, which affects the terminal devices, for example, causes electricity consumption of the terminal devices.

Disclosure of Invention

The embodiment of the application provides a method and device for notifying information change, terminal equipment, network equipment, a chip, a computer readable storage medium, a computer program product and a computer program.

The method for notifying information change provided by the embodiment of the application comprises the following steps:

the terminal equipment receives a first signaling, wherein the first signaling carries first indication information, and the first indication information is used for indicating at least one of the following:

whether the terminal equipment monitors the DCI or not;

whether the terminal equipment monitors MCCH DCI;

whether the terminal equipment reacquires the MCCH signaling;

the MCCH change notification DCI is used to notify MCCH change, the MCCH DCI is used to schedule MCCH, the MCCH is used to carry MCCH signaling, and the MCCH signaling includes one or more MBS configurations.

the network equipment sends a first signaling to the terminal equipment, wherein the first signaling carries first indication information, and the first indication information is used for indicating at least one of the following:

whether the terminal equipment monitors the DCI or not;

whether the terminal equipment monitors MCCH DCI;

Whether the terminal equipment reacquires the MCCH signaling;

The device for notifying information change provided by the embodiment of the application is applied to terminal equipment, and comprises the following components:

the receiving unit is configured to receive a first signaling, where the first signaling carries first indication information, and the first indication information is used to indicate at least one of the following:

whether the terminal equipment monitors the DCI or not;

whether the terminal equipment monitors MCCH DCI;

whether the terminal equipment reacquires the MCCH signaling;

The device for notifying information change provided by the embodiment of the application is applied to network equipment, and comprises the following components:

a sending unit, configured to send a first signaling to a terminal device, where the first signaling carries first indication information, where the first indication information is used to indicate at least one of the following:

Whether the terminal equipment monitors the DCI or not;

whether the terminal equipment monitors MCCH DCI;

whether the terminal equipment reacquires the MCCH signaling;

The terminal equipment provided by the embodiment of the application comprises a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory and executing the method for notifying information change.

The network device provided by the embodiment of the application comprises a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory and executing the method for notifying information change.

The chip provided by the embodiment of the application is used for realizing the method for notifying information change.

Specifically, the chip includes: and a processor for calling and running the computer program from the memory, so that the device mounted with the chip executes the method for notifying information change.

The computer readable storage medium provided in the embodiments of the present application is configured to store a computer program, where the computer program causes a computer to execute the above method for notifying information change.

The computer program product provided by the embodiment of the application comprises computer program instructions, wherein the computer program instructions enable a computer to execute the method for notifying information change.

The computer program provided in the embodiments of the present application, when executed on a computer, causes the computer to execute the above-described method for notifying information change.

According to the technical scheme, the network equipment informs the terminal equipment whether to monitor the MCCH change notification DCI and/or whether to monitor the MCCH DCI and/or whether to reacquire the MCCH signaling through the first indication information carried in the first signaling, so that the purpose of saving power of the terminal equipment is achieved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present application;

fig. 2 is a schematic diagram of a wake-up signal capable of controlling DRX according to an embodiment of the present application;

Fig. 3 is a schematic diagram of an MCCH repetition period provided in an embodiment of the present application;

fig. 4 is a schematic diagram of an MCCH modification period provided in an embodiment of the present application;

FIG. 5 is a flowchart illustrating a method for notifying information change according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a time domain position of a WUS provided by an embodiment of the present application;

fig. 7 is a schematic diagram of the structural composition of the device for notifying information change according to the embodiment of the present application;

fig. 8 is a schematic diagram ii of the structural composition of the device for notifying information change according to the embodiment of the present application;

fig. 9 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

FIG. 10 is a schematic block diagram of a chip of an embodiment of the present application;

fig. 11 is a schematic block diagram of a communication system provided in an embodiment of the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Fig. 1 is a schematic diagram of an application scenario according to an embodiment of the present application.

As shown in fig. 1, communication system 100 may include a terminal device 110 and a network device 120. Network device 120 may communicate with terminal device 110 over the air interface. Multi-service transmission is supported between terminal device 110 and network device 120.

It should be understood that the present embodiments are illustrated by way of example only with respect to communication system 100, but the present embodiments are not limited thereto. That is, the technical solution of the embodiment of the present application may be applied to various communication systems, for example: long term evolution (Long Term Evolution, LTE) systems, LTE time division duplex (Time Division Duplex, TDD), universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), internet of things (Internet of Things, ioT) systems, narrowband internet of things (Narrow Band Internet of Things, NB-IoT) systems, enhanced Machine-type-Type Communications (eMTC) systems, 5G communication systems (also known as New Radio (NR) communication systems), or future communication systems, etc.

In the communication system 100 shown in fig. 1, the network device 120 may be an access network device in communication with the terminal device 110. The access network device may provide communication coverage for a particular geographic area and may communicate with terminal devices 110 (e.g., UEs) located within the coverage area.

The network device 120 may be an evolved base station (Evolutional Node B, eNB or eNodeB) in a long term evolution (Long Term Evolution, LTE) system, or a next generation radio access network (Next Generation Radio Access Network, NG RAN) device, or a base station (gNB) in a NR system, or a radio controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device 120 may be a relay station, an access point, a vehicle device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.

Terminal device 110 may be any terminal device including, but not limited to, a terminal device that employs a wired or wireless connection with network device 120 or other terminal devices.

For example, the terminal device 110 may refer to an access terminal, user Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, an IoT device, a satellite handset, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), a handset with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolution network, etc.

The terminal Device 110 may be used for Device-to-Device (D2D) communication.

The wireless communication system 100 may further comprise a core network device 130 in communication with the base station, which core network device 130 may be a 5G core,5gc device, e.g. an access and mobility management function (Access and Mobility Management Function, AMF), further e.g. an authentication server function (Authentication Server Function, AUSF), further e.g. a user plane function (User Plane Function, UPF), further e.g. a session management function (Session Management Function, SMF). Optionally, the core network device 130 may also be a packet core evolution (Evolved Packet Core, EPC) device of the LTE network, for example a session management function+a data gateway (Session Management Function + Core Packet Gateway, smf+pgw-C) device of the core network. It should be appreciated that SMF+PGW-C may perform the functions performed by both SMF and PGW-C. In the network evolution process, the core network device may also call other names, or form a new network entity by dividing the functions of the core network, which is not limited in this embodiment of the present application.

Communication may also be achieved by establishing connections between various functional units in the communication system 100 through a next generation Network (NG) interface.

For example, the terminal device establishes an air interface connection with the access network device through an NR interface, and is used for transmitting user plane data and control plane signaling; the terminal equipment can establish control plane signaling connection with AMF through NG interface 1 (N1 for short); an access network device, such as a next generation radio access base station (gNB), can establish a user plane data connection with a UPF through an NG interface 3 (N3 for short); the access network equipment can establish control plane signaling connection with AMF through NG interface 2 (N2 for short); the UPF can establish control plane signaling connection with the SMF through an NG interface 4 (N4 for short); the UPF can interact user plane data with the data network through an NG interface 6 (N6 for short); the AMF may establish a control plane signaling connection with the SMF through NG interface 11 (N11 for short); the SMF may establish a control plane signaling connection with the PCF via NG interface 7 (N7 for short).

Fig. 1 exemplarily illustrates one base station, one core network device, and two terminal devices, alternatively, the wireless communication system 100 may include a plurality of base station devices and each base station may include other number of terminal devices within a coverage area, which is not limited in the embodiment of the present application.

It should be noted that fig. 1 illustrates, by way of example, a system to which the present application is applicable, and of course, the method shown in the embodiment of the present application may be applicable to other systems. Furthermore, the terms "system" and "network" are often used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship. It should also be understood that, in the embodiments of the present application, the "indication" may be a direct indication, an indirect indication, or an indication that there is an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B. It should also be understood that, in the embodiments of the present application, reference to "corresponding" may mean that there is a direct correspondence or an indirect correspondence between the two, or may mean that there is an association between the two, or may be a relationship between an instruction and an indicated, configured, or the like. It should also be understood that "predefined" or "predefined rules" mentioned in the embodiments of the present application may be implemented by pre-storing corresponding codes, tables or other manners that may be used to indicate relevant information in devices (e.g., including terminal devices and network devices), and the present application is not limited to a specific implementation thereof. Such as predefined may refer to what is defined in the protocol. It should also be understood that, in the embodiments of the present application, the "protocol" may refer to a standard protocol in the field of communications, and may include, for example, an LTE protocol, an NR protocol, and related protocols applied in future communication systems, which are not limited in this application.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the following description is given of related technologies of the embodiments of the present application, and the following related technologies may be optionally combined with the technical solutions of the embodiments of the present application as an alternative, which all belong to the protection scope of the embodiments of the present application.

With the pursuit of speed, delay, high speed mobility, energy efficiency and diversity and complexity of future life business, the third generation partnership project (3 ^rd Generation Partnership Project,3 GPP) international standards organization began developing 5G. The main application scenario of 5G is: enhanced mobile Ultra-wideband (enhanced Mobile Broadband, emmbb), low latency high reliability communication (URLLC), large-scale Machine-based communication (mctc).

On the one hand, embbs still target users to obtain multimedia content, services and data, and their demand is growing very rapidly. On the other hand, since an eMBB may be deployed in different scenarios, such as indoors, urban, rural, etc., its capabilities and requirements are also quite different, so that detailed analysis must be performed in connection with a specific deployment scenario, not in general. Typical applications of URLLC include: industrial automation, electric power automation, remote medical operation (surgery), traffic safety guarantee and the like. Typical characteristics of mctc include: high connection density, small data volume, delay insensitive traffic, low cost and long service life of the module, etc.

At early deployment of NRs, full NR coverage is difficult to acquire, so typical network coverage is wide area LTE coverage and island coverage mode of NRs. And a large amount of LTE is deployed below 6GHz, and the frequency spectrum below 6GHz which can be used for 5G is few. NR must study spectral applications above 6GHz while high-band coverage is limited and signal fading is fast. Meanwhile, in order to protect the mobile operators from early investment in LTE, a working mode of tight coupling (tight interworking) between LTE and NR is proposed.

RRC state

5G for the purposes of reducing air interface signaling and fast recovery of radio connections, fast recovery of data traffic, a new radio resource control (Radio Resource Control, RRC) state, namely an RRC INACTIVE (RRC_INACTIVE) state, is defined. This state is different from the RRC IDLE (rrc_idle) state and the RRC ACTIVE (rrc_active) state. Wherein,

1) Rrc_idle state (simply referred to as IDLE state): mobility is cell selection reselection based on terminal equipment, paging is initiated by a Core Network (CN), and paging areas are configured by the CN. The base station side has no terminal equipment context and no RRC connection.

2) Rrc_connected state (CONNECTED state for short): there is an RRC connection and there is a terminal device context at the base station side and the terminal device side. The network side knows that the location of the terminal device is cell specific. Mobility is network-side controlled mobility. Unicast data may be transmitted between the terminal device and the base station.

3) Rrc_inactive state (simply referred to as INACTIVE state): mobility is cell selection reselection based on terminal equipment, connection between CN-NR exists, terminal equipment context exists on a certain base station, paging is triggered by RAN, paging area based on RAN is managed by RAN, network side knows that the position of terminal equipment is based on paging area level of RAN.

MBMS

MBMS is a technology for transmitting data from one data source to a plurality of terminal equipments through a shared network resource, which can effectively utilize the network resource while providing a multimedia service, and realize broadcasting and multicasting of a multimedia service of a higher rate (e.g., 256 kbps).

Due to the low MBMS spectrum efficiency, it is not sufficient to effectively carry and support the operation of the mobile tv type service. In LTE, 3GPP has therefore explicitly proposed to enhance the support capability for the downlink high speed MBMS service and to determine the design requirements for the physical layer and the air interface.

The 3gpp R9 introduces evolved MBMS (eMBMS) into LTE. eMBMS proposes the concept of a single frequency network (Single Frequency Network, SFN), i.e. a multimedia broadcast multicast service single frequency network (Multimedia Broadcast multicast service Single Frequency Network, MBSFN), wherein the MBSFN uses a unified frequency to simultaneously transmit traffic data in all cells, but synchronization between the cells is guaranteed. The method can greatly improve the overall signal-to-noise ratio distribution of the cell, and the frequency spectrum efficiency can be correspondingly and greatly improved. eMBMS implements broadcast and multicast of services based on IP multicast protocols.

In LTE or LTE-Advanced (LTE-a), MBMS has only a broadcast bearer mode and no multicast bearer mode. In addition, the reception of the MBMS service is applicable to terminal devices in an idle state or a connected state.

A single cell point-to-multipoint (Single Cell Point To Multiploint, SC-PTM) concept is introduced in 3gpp r13, SC-PTM being based on the MBMS network architecture.

MBMS introduces new logical channels including Single Cell multicast control channel (SC-MCCH) and Single Cell multicast transport channel (SC-MTCH) and Single Cell-Multicast Transport Channel. The SC-MCCH and SC-MTCH are mapped onto a Downlink-Shared Channel (DL-SCH), and further, the DL-SCH is mapped onto a physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH), wherein the SC-MCCH and SC-MTCH belong to a logical Channel, the DL-SCH belongs to a transport Channel, and the PDSCH belongs to a physical Channel. The SC-MCCH and SC-MTCH do not support hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) operation.

MBMS introduces a new system information block (System Information Block, SIB) type, SIB20. Specifically, the configuration information of the SC-MCCH is transmitted through the SIB20, and one cell has only one SC-MCCH. The configuration information of the SC-MCCH comprises: the modification period of the SC-MCCH, the repetition period of the SC-MCCH, the radio frame and subframe for scheduling the SC-MCCH and other information. Further, 1) the boundary of the modification period of the SC-MCCH satisfies SFN mod m=0, where SFN represents a system frame number of the boundary, and m is a modification period (i.e., SC-MCCH-modification period) of the SC-MCCH configured in SIB20. 2) The radio frame of the scheduling SC-MCCH meets the following conditions: SFN mod MCCH-repetition period = MCCH-Offset, where SFN represents the system frame number of the radio frame, MCCH-repetition period represents the repetition period of the SC-MCCH, and MCCH-Offset represents the Offset of the SC-MCCH. 3) The subframes of the scheduling SC-MCCH are indicated by SC-MCCH-Subframe.

The SC-MCCH is scheduled through a physical downlink control channel (Physical Downlink Control Channel, PDCCH). In one aspect, a new radio network temporary identity (Radio Network Tempory Identity, RNTI), i.e., single Cell RNTI (SC-RNTI), is introduced to identify a PDCCH (e.g., SC-MCCH PDCCH) for scheduling the SC-MCCH, optionally with the SC-RNTI fixed value FFFC. On the other hand, a new RNTI, i.e., a single cell notification RNTI (Single Cell Notification RNTI, SC-N-RNTI) is introduced to identify a PDCCH (e.g., notification PDCCH) for indicating a change notification of the SC-MCCH, optionally, the SC-N-RNTI is fixed to a value of FFFB; further, the change notification may be indicated with one bit of 8 bits (bits) of DCI 1C. In LTE, the configuration information of SC-PTM is based on the SC-MCCH configured by SIB20, and then SC-MCCH configures SC-MTCH for transmitting service data.

Specifically, the SC-MCCH transmits only one message (i.e., scptm configuration) for configuring configuration information of the SC-PTM. The configuration information of the SC-PTM comprises: temporary mobile Group identity (Temporary Mobile Group Identity, TMGI), session identity (session id), group RNTI (G-RNTI), discontinuous reception (Discontinuous Reception, DRX) configuration information, SC-PTM service information of neighbor cells, and the like. Note that SC-PTM in R13 does not support the robust header compression (Robust Header Compression, ROHC) function.

The downlink discontinuous reception of the SC-PTM is controlled by the following parameters: onDurationTimerSCPTM, drx-InactivityTimerSCPTM, SC-MTCH-scheduling cycle, and SC-MTCH-scheduling offset.

When [ (SFN 10) +subframe number ] module (SC-MTCH-scheduling cycle) =sc-MTCH-scheduling offset is satisfied, a timer ondurationtimerscpm is started;

when receiving downlink PDCCH scheduling, starting a timer drx-InactivityTimerSCPTM;

the downstream SC-PTM service is received only when the timer onduration timerscpm or drx-incaactyitimerscpm is running.

The SC-PTM service continuity adopts the MBMS service continuity concept based on SIB15, namely a mode of SIB15 and MBMSInterestindication. The traffic continuity of the terminal device in idle state is based on the concept of frequency priority.

In the technical solution of the embodiment of the present application, a new SIB (referred to as a first SIB) is defined, where the first SIB includes configuration information of a first MCCH, where the first MCCH is a control channel of an MBMS service, in other words, the first SIB is used to configure configuration information of a control channel of an NR MBMS, alternatively, the control channel of the NR MBMS may also be referred to as an NR MCCH (i.e. the first MCCH).

Further, the first MCCH is used to carry the first signaling, and in the embodiment of the present application, the name of the first signaling is not limited, for example, the first signaling is signaling a, where the first signaling includes configuration information of at least one first MTCH, where the first MTCH is a traffic channel (also referred to as a data channel or a transport channel) of an MBMS service, and the first MTCH is used to transport MBMS service data (such as service data of NR MBMS). In other words, the first MCCH is used to configure configuration information of a traffic channel of the NR MBMS, alternatively, the traffic channel of the NR MBMS may also be called as NR MTCH (i.e., the first MTCH).

Specifically, the first signaling is used for configuring a service channel of the NR MBMS, service information corresponding to the service channel, and scheduling information corresponding to the service channel. Further optionally, the service information corresponding to the service channel, for example, TMGI, session id, and other identification information for identifying the service. Scheduling information corresponding to the service channel, for example, RNTI used when MBMS service data corresponding to the service channel is scheduled, for example, G-RNTI, DRX configuration information, and the like.

The transmissions of the first MCCH and the first MTCH are scheduled based on the PDCCH. The RNTI used for scheduling the PDCCH of the first MCCH uses a unique network identifier, i.e. a fixed value. The RNTI used for scheduling PDCCH use of the first MTCH is configured through the first MCCH.

It should be noted that, in the embodiment of the present application, the naming of the first SIB, the first MCCH and the first MTCH is not limited. For convenience of description, the first SIB may also be simply referred to as SIB, the first MCCH may also be simply referred to as MCCH, and the first MTCH may also be simply referred to as MTCH, and a PDCCH (i.e. MCCH PDCCH) for scheduling the MCCH and a notification PDCCH are configured through SIB, where a PDSCH (i.e. MCCH PDSCH) for transmitting the MCCH is scheduled through DCI carried in MCCH PDCCH. Further, M PDCCHs for scheduling MTCH (i.e., MTCH 1 PDCCH, MTCH 2 PDCCH, …, MTCH M PDCCH) are configured through the MCCH, wherein DCI carried by MTCH n PDCCH schedules PDSCH for transmitting MTCH n (i.e., MTCH n PDSCH), n being an integer greater than or equal to 1 and less than or equal to M. The MCCH and the MTCH are mapped to the DL-SCH, and further, the DL-SCH is mapped to the PDSCH, wherein the MCCH and the MTCH belong to a logical channel, the DL-SCH belongs to a transport channel, and the PDSCH belongs to a physical channel.

It should be noted that, although the above scheme is described by taking MBMS as an example, the description of "MBMS" may be replaced by "MBS". The embodiment of the present application is described by taking MBS as an example, and the description of "MBS" may be replaced by "MBMS".

Energy saving

In order to achieve energy saving of the terminal device, an energy saving Wake Up Signal (WUS) is introduced by NR energy saving enhancement, which may also be referred to as energy saving Signal or Wake Up Signal for short. In standardization, an energy-saving wake-up signal is used in combination with a Discontinuous Reception (DRX) mechanism, and the specific technical principle is that a terminal device receives the energy-saving wake-up signal before a DRX ON duration, as shown in fig. 2, when the terminal device has data transmission in one DRX cycle, the energy-saving wake-up signal instructs the terminal device to monitor a PDCCH, i.e. the energy-saving wake-up signal "wakes up" the terminal device to monitor the PDCCH during the DRX ON duration; otherwise, when the terminal device has no data transmission in one DRX period, the energy-saving wake-up signal indicates that the terminal device does not monitor the PDCCH, i.e. the energy-saving wake-up signal does not "wake up" the terminal device, and the terminal device does not need to monitor the PDCCH during the DRX ON Duration. Compared with the traditional DRX mechanism, when the terminal equipment does not have data transmission, the terminal equipment can omit PDCCH monitoring during the DRX ON duration, thereby realizing energy saving. The time before the terminal device is DRX ON Duration is referred to as DRX inactive time, and the time at the terminal device is referred to as DRX active time.

In NR systems, many scenarios require support of multicast type and broadcast type traffic demands, such as in the internet of vehicles, industrial internet, etc. It is necessary to introduce multicast type and broadcast type MBS services in the NR. It should be noted that, the multicast type MBS service refers to an MBS service transmitted through a multicast manner. The broadcast type MBS service refers to an MBS service transmitted through a broadcast manner.

In the NR system, for MBS configuration of broadcast type MBS service, an MCCH (e.g., a first MCCH in the above scheme) is configured by a newly defined SIB (e.g., a first SIB in the above scheme). The MCCH carried signaling (e.g., the first signaling in the above scheme may also be referred to as MCCH signaling) is used to configure one or more MTCHs, where an MTCH is a traffic channel of an MBS service, and thus, configuration information of one MTCH may also be understood as MBS configuration of an MBS service, and the MCCH carried signaling is used to configure MBS configuration of one or more MBS services. The configuration information of the MTCH (i.e., MBS configuration of the MBS service) may be changed, and if the change occurs, the network device needs to notify the terminal device to reacquire the MCCH signaling, thereby updating the MBS configuration of the MBS service.

The MCCH is periodically transmitted, and MCCH PDCCH for scheduling the MCCH is also periodically transmitted, and as shown in fig. 3, the period of the MCCH is called an MCCH repetition period (MCCH repetition period), and a duration (duration) within one MCCH repetition period is called an MCCH duration within which MCCH PDCCH is transmitted. Further, MCCH PDCCH may be transmitted in a beam scanning fashion, fig. 3 being an example of transmission in a beam scanning fashion over 4 beams MCCH PDCCH.

The MCCH change can be notified by DCI, and such DCI may be referred to as MCCH change notification DCI. Here, notifying the MCCH change means notifying that the content in the MCCH signaling is changed. If the MCCH is notified, the terminal equipment needs to acquire the MCCH signaling again, and if the MCCH is not notified, the terminal equipment does not need to monitor MCCH PDCCH in each MCCH repetition period so as to acquire the MCCH signaling, thereby achieving the purpose of saving electricity. As shown in fig. 4, the MCCH change notification DCI is transmitted in one MCCH modification period (MCCH modification period). The MCCH may be changed at the start of the next MCCH modification period, or the MCCH may be changed at the start of the MCCH modification period in which the MCCH modification notification DCI is located. Here, changing the MCCH may be understood as changing the content in the MCCH signaling carried by the MCCH.

The MBS configuration of all MBS services broadcasted by one cell is configured through one MCCH signaling. The MBS configuration of any MBS service changes and the content in the MCCH signaling is updated. In the case of MCCH signaling update, all terminal devices need to reacquire MCCH signaling, and even if MBS configuration of MBS services to which some terminal devices join is not changed, the terminal devices need to reacquire MCCH signaling, which affects the terminal devices, for example, causes electricity consumption of the terminal devices.

For this reason, the following technical solutions of the embodiments of the present application are proposed.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies may be optionally combined with the technical solutions of the embodiments of the present application, which all belong to the protection scope of the embodiments of the present application. Embodiments of the present application include at least some of the following.

Fig. 5 is a flowchart of a method for notifying information change provided in an embodiment of the present application, and as shown in fig. 5, the method for notifying information change includes the following steps:

step 501: the network equipment sends a first signaling to the terminal equipment, and the terminal equipment receives the first signaling, wherein the first signaling carries first indication information, and the first indication information is used for indicating at least one of the following: whether the terminal equipment monitors the DCI or not; whether the terminal equipment monitors MCCH DCI; whether the terminal equipment reacquires the MCCH signaling; the MCCH change notification DCI is used to notify MCCH change, the MCCH DCI is used to schedule MCCH, the MCCH is used to carry MCCH signaling, and the MCCH signaling includes one or more MBS configurations.

In some alternative embodiments, the network device is a base station.

In this embodiment of the present application, the first signaling is a first DCI, or a first WUS, or a second WUS. Here, the first DCI may also be referred to as MCCH change notification DCI. The first WUS may also be referred to as MCCH WUS. The second WUS may also be referred to as an MCCH change notification WUS. The names of the first DCI, the first WUS, and the second WUS are not limited in the embodiments of the present application.

The techniques of the embodiments of the present application are described below in connection with different implementations of the first signaling.

Scheme one

The first signaling is first DCI, and the first indication information carried in the first DCI is used to indicate whether the terminal device reacquires the MCCH signaling.

In some alternative embodiments, the first DCI is scrambled by a first RNTI; the first RNTI is an RNTI scrambling the MCCH DCI; or, the first RNTI is an RNTI dedicated to scrambling the first DCI.

In some optional embodiments, in a case that the first RNTI is an RNTI of a scrambled MCCH DCI, the first DCI carries second indication information for indicating whether the first DCI is used to notify MCCH modification or schedule MCCH.

Scheme 1-1

In some optional embodiments, the first indication information includes third information for indicating at least one of: MBS business with changed MBS configuration and MBS business with unchanged MBS configuration.

In some optional embodiments, the third information is a first bitmap, where each bit in the first bitmap corresponds to identification information of one MBS service; the value of the bit is used for indicating whether the MBS service corresponding to the bit is changed in MBS configuration. Further, optionally, the identification information of the MBS service includes at least one of the following: MBS session identification of MBS service, TMGI of MBS service, MBS index of MBS service.

In some optional embodiments, N bits in the first bit map correspond to identification information of N MBS services, where N is a positive integer; the corresponding relation between N bits in the first bit map and the identification information of the N MBS services is agreed by a protocol; or, the corresponding relation between the N bits in the first bit map and the identification information of the N MBS services is configured by the network device through SIB or MCCH signaling.

In some optional embodiments, the N bits in the first bit map correspond to the identification information of the N MBS services in order from low to high; or, the N bits in the first bit map correspond to the identification information of the N MBS services in the order from the low bit to the high bit.

In the above scheme, if the terminal device determines that the first MBS service added by the terminal device changes MBS configuration based on the first bitmap, the terminal device determines that the MCCH signaling needs to be reacquired; and if the terminal equipment determines that the first MBS service added by the terminal equipment is not changed in MBS configuration based on the first bit map, the terminal equipment determines that the MCCH signaling does not need to be acquired again.

Scheme 1-2

In some optional embodiments, the third information is a second bitmap, where each bit in the second bitmap corresponds to an MBS group identifier of one MBS service group; the value of the bit is used for indicating whether the MBS service group corresponding to the bit is changed in MBS configuration.

Here, it should be noted that, when the MBS configuration of all MBS services (or some MBS services) in the MBS service group is changed, the MBS configuration of the MBS service group is considered to be changed.

In some optional embodiments, M bits in the second bitmap correspond to MBS group identifiers of M MBS service groups, where M is a positive integer; the corresponding relation between M bits in the second bit map and MBS group identifications of the M MBS service groups is agreed by a protocol; or, the corresponding relation between the M bits in the second bit map and the MBS group identifications of the M MBS service groups is configured by the network equipment through SIB or MCCH signaling.

In some optional embodiments, M bits in the second bitmap correspond to MBS group identifiers of the M MBS service groups in order from low to high; or, the M bits in the second bitmap correspond to the MBS group identities of the M MBS service groups in the order from the low bit to the high bit.

In the above scheme, if the terminal device determines, based on the second bitmap, that an MBS configuration of an MBS service group to which a first MBS service added by the terminal device belongs has been changed, the terminal device determines that an MCCH signaling needs to be reacquired, and obtains an updated MBS configuration of the first MBS service based on the MCCH signaling; if the terminal equipment determines that the MBS service group to which the first MBS service added by the terminal equipment belongs does not change MBS configuration based on the second bit map, the terminal equipment determines that the MCCH signaling does not need to be acquired again.

In some optional embodiments, the network device sends second configuration information to the terminal device, where the terminal device receives the second configuration information, where the second configuration information is used to determine a correspondence between at least one MBS service and at least one MBS service group; and the terminal equipment determines the MBS service group to which the first MBS service added by the terminal equipment belongs based on the second configuration information. Further optionally, the second configuration information is carried in SIB or MCCH signaling.

In some optional embodiments, the terminal device receives third configuration information, where the third configuration information is used to determine a correspondence between a service group identifier and a service identifier; the terminal equipment determines a service group identifier of an MBS service group to which the first MBS service added by the terminal equipment belongs based on the third configuration information; or the terminal equipment determines the service group identifier of the MBS service group to which the first MBS service belongs based on the service identifier of the first MBS service added by the terminal equipment.

Here, optionally, the third configuration information is carried in RRC signaling or NAS signaling. The network equipment configures the corresponding relation between the service group identifier and the service identifier for the terminal equipment through RRC signaling or NAS signaling. Here, the service group identifier refers to an identifier of an MBS service group, and the service identifier refers to an identifier of an MBS service. The terminal equipment can determine the service group identifier of the corresponding MBS service group according to the corresponding relation between the service group identifier and the service identifier of the first MBS service added by the terminal equipment, thereby judging whether the MBS configuration is changed according to the service group identifier of the MBS service group.

Here, the terminal device may also calculate the service group identifier according to the service identifier of the first MBS service added to determine whether the MBS configuration is changed according to the service group identifier. As an example, the service group identification may be calculated according to the following formula: service group identity = service identity mod S, where S is a positive integer, alternatively S may be the number of services included in one service group.

Scheme II

The first signaling is a first WUS, and the first indication information carried in the first WUS is used to indicate whether the terminal device monitors MCCH DCI and/or reacquires MCCH signaling.

In some alternative embodiments, the first WUS is scrambled by WUS RNTI in case the first WUS belongs to DCI.

In this embodiment of the present application, the first WUS may be associated with one MCCH transmission window, or K MCCH transmission windows, or one transmission period. This will be described below.

Option 1) in some alternative embodiments, the first WUS is associated with one MCCH transmission window, and the first WUS is located before the MCCH transmission window associated with the first WUS.

Option 2) in some alternative embodiments, the first WUS associates K MCCH transmission windows, the first WUS is located before its associated K MCCH transmission windows, and K is an integer greater than 1.

Here, optionally, the value of K is configured for the network device.

Here, optionally, the starting position of the first MCCH transmission window in the K MCCH transmission windows is configured by the network device.

Here, optionally, the first WUS is monitored by the terminal device within a WUS duration, and a deviation of a start position or an end position of the WUS duration with respect to a start position of a first MCCH transmission window of the K MCCH transmission windows is a first deviation.

Option 3) in some alternative embodiments, the first WUS is associated with a transmission period, the first WUS being located before its associated transmission period.

Here, optionally, the length of the transmission period is configured for the network device.

Here, optionally, the start position of the transmission period is determined based on the length of the transmission period. As an example, the transmission period has a length T, and the frame number at the start position of the transmission period satisfies the following formula: SFN mod t=0.

Here, optionally, the first WUS is monitored by the terminal device within a WUS duration, and a deviation of a start position or an end position of the WUS duration from a start position of the transmission period is a first deviation.

In the above scheme, the transmission period includes L MCCH transmission windows, where L is an integer greater than 1.

In the above scheme, the MCCH transmission window is used for transmitting MCCH DCI. As an example, the MCCH transmission window is a time window corresponding to an MCCH duration or a time window corresponding to an MCCH repetition period.

In some optional embodiments, the network device sends first configuration information to the terminal device, and the terminal device receives the first configuration information, where the first configuration information includes configuration information of a first WUS, and the configuration information of the first WUS includes at least one of: the length of the WUS duration, the starting position or the ending position of the WUS duration, respectively. Further optionally, the first configuration information is carried in SIB or MCCH signaling.

Scheme 2-1

In some optional embodiments, the first indication information includes first information, where a value of the first information is used to indicate whether to monitor MCCH DCI after the first WUS and/or whether to receive MCCH signaling after the first WUS.

In the above scheme, if the value of the first information is the first value, the terminal device determines to monitor the MCCH DCI following the first WUS and/or receive the MCCH signaling following the first WUS; and if the value of the first information is the second value, the terminal equipment determines not to monitor the MCCH DCI behind the first WUS and/or not to receive the MCCH signaling behind the first WUS. As an example, the first value is 1 and the second value is 0; alternatively, the first value is 0 and the second value is 1.

Here, in the case that the terminal device determines to monitor the MCCH DCI after the first WUS and/or receive the MCCH signaling after the first WUS, the terminal device monitors the MCCH DCI and/or receives the MCCH signaling in the MCCH transmission window or K MCCH transmission windows or in one transmission period associated with the first WUS. And under the condition that the terminal equipment determines not to monitor the MCCH DCI behind the first WUS and/or not to receive the MCCH signaling behind the first WUS, the terminal equipment does not monitor the MCCH DCI and/or not to receive the MCCH signaling in the MCCH transmission window or K MCCH transmission windows or in one transmission period associated with the first WUS.

Scheme 2-2

The third information is a first bit map, and each bit in the first bit map corresponds to identification information of one MBS service; the value of the bit is used for indicating whether the MBS service corresponding to the bit is changed in MBS configuration. Further, optionally, the identification information of the MBS service includes at least one of the following: MBS session identification of MBS service, TMGI of MBS service, MBS index of MBS service.

In the above scheme, if the terminal device determines that the first MBS service added by the terminal device changes MBS configuration based on the first bitmap, the terminal device determines that the MCCH DCI needs to be monitored and/or the MCCH signaling needs to be reacquired; if the terminal equipment determines that the first MBS service added by the terminal equipment does not change MBS configuration based on the first bit map, the terminal equipment determines that the MCCH DCI does not need to be monitored and/or the MCCH signaling is not acquired again.

Scheme 2-3

In the above scheme, if the terminal device determines, based on the second bitmap, that the MBS service group to which the first MBS service added by the terminal device belongs has changed MBS configuration, the terminal device determines that the MCCH DCI needs to be monitored and/or the MCCH signaling needs to be reacquired; if the terminal equipment determines that the MBS service group to which the first MBS service added by the terminal equipment belongs does not change MBS configuration based on the second bit map, the terminal equipment determines that the MCCH DCI does not need to be monitored and/or the MCCH signaling is not required to be acquired again.

Scheme III

The first signaling is a second WUS, and the first indication information carried in the second WUS is used to indicate whether the terminal device monitors the DCI for MCCH modification notification.

In some alternative embodiments, where the second WUS belongs to DCI, the second WUS is scrambled by WUS RNTI.

In some alternative embodiments, the second WUS is associated with a transmission window, where the transmission window is used for transmitting the DCI for the MCCH change notification, and the second WUS is located before the transmission window associated with the second WUS.

Here, optionally, the transmission window is one window in an MCCH modification period.

Here, optionally, in the case where the transmission window is an MCCH transmission window, the search space of the MCCH modification notification DCI is the same as the search space of the MCCH DCI.

Here, optionally, the second WUS is monitored by the terminal device within a WUS duration, and a deviation of a start position or an end position of the WUS duration with respect to a start position of the transmission window is a first deviation.

In some optional embodiments, the network device sends first configuration information to the terminal device, the terminal device receives the first configuration information, the first configuration information includes configuration information of a second WUS, wherein the configuration information of the second WUS includes at least one of: the length of the WUS duration, the starting position or the ending position of the WUS duration, respectively. Further optionally, the first configuration information is carried in SIB or MCCH signaling.

Scheme 3-1

In some optional embodiments, the first indication information includes second information, where a value of the second information is used to indicate whether to monitor an MCCH change notification DCI following the second WUS.

In the above scheme, if the value of the second information is the first value, the terminal device determines to monitor the DCI of the MCCH change notification after the second WUS; and if the value of the second information is the second value, the terminal equipment determines not to monitor the DCI of the MCCH change notification behind the second WUS. As an example, the first value is 1 and the second value is 0; alternatively, the first value is 0 and the second value is 1.

Here, in the case that the terminal device determines to monitor the MCCH change notification DCI after the second WUS, the terminal device monitors the MCCH change notification DCI within a transmission window associated with the second WUS. And under the condition that the terminal equipment determines not to monitor the DCI of the MCCH change notification after the second WUS, the terminal equipment does not monitor the DCI of the MCCH change notification in a transmission window associated with the second WUS.

Scheme 3-2

In the above scheme, if the terminal device determines that the first MBS service added by the terminal device changes MBS configuration based on the first bitmap, the terminal device determines that the MCCH change notification DCI needs to be monitored; if the terminal equipment determines that the first MBS service added by the terminal equipment does not change MBS configuration based on the first bit map, the terminal equipment determines that the MCCH change notification DCI does not need to be monitored.

Scheme 3-3

In the above scheme, if the terminal device determines, based on the second bitmap, that the MBS service group to which the first MBS service added by the terminal device belongs has changed MBS configuration, the terminal device determines that the MCCH change notification DCI needs to be monitored; if the terminal equipment determines that the MBS service group to which the first MBS service added by the terminal equipment belongs does not change MBS configuration based on the second bit map, the terminal equipment determines that the MCCH change notification DCI does not need to be monitored.

According to the technical scheme, a tag (which can be called a value tag) is introduced, and the tag is used for counting MCCH changes.

Specifically, the network device sends the value of the first label, the terminal device obtains the value of the first label, and the value of the first label is added with 1 when the content in the MCCH signaling is changed once; and the terminal equipment determines whether the MCCH signaling needs to be reacquired or not based on the value of the first label.

In some optional embodiments, the terminal device obtains the value of the first tag from SIB or MCCH DCI.

In some optional embodiments, the terminal device obtains the value of the first tag in an MCCH modification period.

In the above scheme, the initial value of the first tag is 0, the maximum value of the first tag is H, H is a positive integer, and the value of the first tag is recovered to the initial value after reaching the maximum value.

After the terminal device obtains the value of the first tag, whether the MCCH signaling needs to be re-obtained can be determined by the following manner: if the value of the first label stored by the terminal equipment is the same as the value of the acquired first label, determining that the MCCH signaling does not need to be acquired again; and if the value of the first label stored by the terminal equipment is different from the value of the acquired first label, determining that the MCCH signaling needs to be acquired again.

The following describes the technical solutions of the embodiments of the present application by way of example with reference to specific application examples.

Application example 1

In this example, the network device indicates to the terminal device, through the first DCI, whether the terminal device reacquires the MCCH signaling.

In some optional embodiments, in a case that the first RNTI is an RNTI of a scrambled MCCH DCI, the first DCI carries second indication information for indicating whether the first DCI is used to notify MCCH modification or schedule MCCH. Further, if the second indication information is used to indicate that the first DCI is used to notify MCCH modification, there is no scheduling information of the MCCH in the first DCI. Taking the first DCI as MCCH DCI for example, the MCCH DCI is scrambled by a first RNTI, where the first RNTI is an RNTI that scrambles the MCCH DCI, the MCCH DCI does not carry scheduling information of the MCCH but carries second indication information, where the second indication information is used to indicate that the MCCH DCI is used to notify MCCH modification.

Scheme 1-1

As an example, a bit value of 1 (or 0) is used to indicate that the MBS service corresponding to the bit has changed MBS configuration, and a bit value of 0 (or 1) is used to indicate that the MBS service corresponding to the bit has not changed MBS configuration.

As an example, the N MBS services are N MBS services being broadcast by the cell.

Here, the first MBS service added by the terminal device may be understood as an MBS service that the terminal device is receiving or an MBS service that the terminal device is about to receive or an MBS service that the terminal device is interested in.

Scheme 1-2

In some optional embodiments, the first indication information includes third information, where the third information is used to indicate at least one of: MBS business with changed MBS configuration and MBS business with unchanged MBS configuration.

Application instance two

In this example, the network device indicates to the terminal device, through the first WUS (referred to as MCCH WUS), whether the terminal device listens to the MCCH DCI and/or reacquires the MCCH signaling.

Here, in case that the first WUS belongs to DCI, the first WUS is scrambled by WUS RNTI.

In this example, the first WUS may be associated with one MCCH transmission window, or K MCCH transmission windows, or one transmission period. This will be described below.

Here, there is one first WUS before each MCCH transmission window.

Here, optionally, the value of K is configured for the network device.

Here, there is one first WUS before every K MCCH transmission windows, i.e. K MCCH transmission windows share the same first WUS. Wherein a first WUS exists before a first MCCH transmission window of the K MCCH transmission windows, as shown in fig. 6, the first deviation (called WUS deviation (WUS offset)) refers to a deviation of an end position of WUS duration (WUS duration) with respect to a start position of the first MCCH transmission window.

Here, optionally, the network device configures a frame number where the start position of the first MCCH transmission window in the K MCCH transmission windows is located, and then the terminal device can determine the positions of the K MCCH transmission windows through the value of K.

In the above scheme, the MCCH transmission window is used for transmitting MCCH DCI.

Here, there is one first WUS before each transmission period, i.e. all MCCH transmission windows in one transmission period share the same first WUS. Wherein, there is a first WUS before the start position of the transmission period, and the first offset (called WUS offset) refers to an offset of the end position of WUS duration (WUS duration) relative to the start position of the transmission period. Here, the network device configures the length of one transmission period to be T, and then the frame number where the start position of the transmission period is located may be determined by the following formula: SFN mod t=0.

In this example, the network device may configure configuration information of the first WUS (i.e., MCCH WUS) through SIB or MCCH signaling, where the configuration information of the first WUS includes at least one of: the length of the WUS duration, the starting position or the ending position of the WUS duration, respectively.

Here, the length of WUS duration may be in units of symbols, slots, subframes, radio frames, and the like.

Here, the unit of the first deviation may be a symbol, a slot, a subframe, a radio frame, or the like.

In this example, the first WUS carries first indication information, and an implementation manner of the first indication information is described below.

Scheme 2-1

As an example, the first information is 1-bit information, and a value of 1 (or 0) is used to indicate to monitor MCCH DCI following the first WUS and/or receive MCCH signaling following the first WUS. The value of 1 bit information is 0 (or 1) to indicate that the MCCH DCI following the first WUS is not monitored and/or the MCCH signaling following the first WUS is not received.

Scheme 2-2

Scheme 2-3

In the above scheme, the terminal device monitors the first WUS within the WUS duration, if the first indication information in the first WUS indicates that the terminal device does not monitor the MCCH DCI and/or does not acquire the MCCH signaling again, the terminal device does not monitor the MCCH DCI after the first WUS and/or does not acquire the MCCH signaling after the first WUS, otherwise, the terminal device monitors the MCCH DCI after the first WUS and/or acquires the MCCH signaling after the first WUS.

Application example three

In this example, the network device indicates to the terminal device, through a second WUS (referred to as MCCH WUS), whether the terminal device listens to the MCCH change notification DCI.

Here, in case the second WUS belongs to DCI, the second WUS is scrambled by WUS RNTI.

In this example, the second WUS may be associated with a transmission window, where the transmission window is used to transmit the DCI for the MCCH change notification, and the second WUS is located before the associated transmission window.

Here, optionally, the transmission window is one window in an MCCH modification period. I.e. defining a transmission window in the MCCH modification period, the transmission window being used for transmitting the MCCH modification notification DCI.

In this example, the network device may configure configuration information of the second WUS (i.e., MCCH change notification WUS) through SIB or MCCH signaling, where the configuration information of the second WUS includes at least one of: the length of the WUS duration, the starting position or the ending position of the WUS duration, respectively.

In this example, the second WUS carries the first indication information, and an implementation manner of the first indication information is described below.

Scheme 3-1

As an example, the second information is 1-bit information, and a value of 1-bit information is 1 (or 0) for indicating to monitor the MCCH change notification DCI following the second WUS. The value of the 1-bit information is 0 (or 1) to indicate that the MCCH change notification DCI following the second WUS is not monitored.

Scheme 3-2

Scheme 3-3

In the above scheme, the terminal device listens to the second WUS within the duration of the WUS, and if the first indication information in the second WUS indicates that the terminal device does not listen to the MCCH change notification DCI. The terminal device does not monitor the MCCH change notification DCI. Otherwise, the terminal equipment monitors the DCI for the MCCH change notification.

Application example four

In this example, the network device sends a value (i.e., value tag) of a tag (i.e., a first tag in the above scheme) to the terminal device through SIB or MCCH DCI, where the value of the tag is an integer value. The tag may be called an MCCH value tag (MCCH value tag), whose initial value is 0 and maximum value is H, and the value of the tag is incremented by 1 each time the contents in the MCCH signaling are changed. If the value of the tag reaches a maximum value, the value of the tag starts from 0. And under the scene that the terminal equipment does not receive the MCCH change notification DCI in the MCCH modification period or recovers from the coverage hole and receives the MCCH signaling, the terminal equipment autonomously acquires the value of the tag in each MCCH modification period, compares the acquired value of the tag with the stored value of the tag, and considers that the stored MBS configuration is valid if the acquired value of the tag is the same, otherwise, re-acquires the MCCH signaling.

According to the technical scheme, whether the terminal equipment monitors the MCCH change notification DCI and/or monitors the MCCH DCI and/or reacquires the MCCH signaling is indicated by DCI or WUS, so that the purpose of saving electricity of the terminal equipment can be achieved.

The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present application within the scope of the technical concept of the present application, and all the simple modifications belong to the protection scope of the present application. For example, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in detail. As another example, any combination of the various embodiments of the present application may be made without departing from the spirit of the present application, which should also be considered as disclosed herein. For example, the various embodiments and/or technical features of the various embodiments described herein may be combined with any other of the prior art without conflict, and the combined technical solutions should also fall within the scope of protection of the present application.

It should be further understood that, in the various method embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic of the processes, and should not constitute any limitation on the implementation process of the embodiments of the present application. Further, in the embodiment of the present application, the terms "downstream", "upstream" and "sidestream" are used to indicate a transmission direction of signals or data, where "downstream" is used to indicate that the transmission direction of signals or data is a first direction from a station to a user equipment of a cell, "upstream" is used to indicate that the transmission direction of signals or data is a second direction from the user equipment of the cell to the station, and "sidestream" is used to indicate that the transmission direction of signals or data is a third direction from the user equipment 1 to the user equipment 2. For example, "downstream signal" means that the transmission direction of the signal is the first direction. In addition, in the embodiment of the present application, the term "and/or" is merely an association relationship describing the association object, which means that three relationships may exist. Specifically, a and/or B may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

Fig. 7 is a schematic structural diagram of an apparatus for notifying information change provided in an embodiment of the present application, which is applied to a terminal device, as shown in fig. 7, where the apparatus for notifying information change includes:

a receiving unit 701, configured to receive a first signaling, where the first signaling carries first indication information, where the first indication information is used to indicate at least one of the following:

whether the terminal equipment monitors the DCI or not;

whether the terminal equipment monitors MCCH DCI;

whether the terminal equipment reacquires the MCCH signaling;

In some optional embodiments, the first signaling is first DCI, and the first indication information carried in the first DCI is used to indicate whether the terminal device reacquires MCCH signaling.

In some optional embodiments, the first DCI is scrambled by a first radio network temporary identity RNTI;

the first RNTI is an RNTI scrambling the MCCH DCI; or,

the first RNTI is an RNTI dedicated to scrambling the first DCI.

In some alternative embodiments, where the first RNTI is an RNTI that scrambles MCCH DCI,

the first DCI carries second indication information, and the second indication information is used for indicating whether the first DCI is used for notifying MCCH change or scheduling MCCH.

In some optional embodiments, the first signaling is a first wake-up signal WUS, and the first indication information carried in the first WUS is used to indicate whether the terminal device listens to the MCCH DCI and/or reacquires the MCCH signaling.

In some alternative embodiments, the first WUS is associated with one MCCH transmission window, and the first WUS is located before the MCCH transmission window associated with the first WUS.

In some alternative embodiments, the first WUS associates K MCCH transmission windows, where the first WUS is located before the K MCCH transmission windows associated with the first WUS, and K is an integer greater than 1.

In some alternative embodiments, the value of K is configured for the network device.

In some optional embodiments, the starting position of the first MCCH transmission window in the K MCCH transmission windows is configured for a network device.

In some alternative embodiments, the first WUS is monitored by the terminal device within a WUS duration, and a deviation of a start position or an end position of the WUS duration with respect to a start position of a first MCCH transmission window of the K MCCH transmission windows is a first deviation.

In some alternative embodiments, the first WUS is associated with a transmission period, the first WUS being located before its associated transmission period.

In some alternative embodiments, the length of the transmission period is configured for the network device.

In some alternative embodiments, the start position of the transmission period is determined based on the length of the transmission period.

In some alternative embodiments, the first WUS is heard by the terminal device within a WUS duration, and the deviation of the start position or the end position of the WUS duration from the start position of the transmission period is a first deviation.

In some alternative embodiments, the transmission period includes L MCCH transmission windows, where L is an integer greater than 1.

In some optional embodiments, the first signaling is a second WUS, and the first indication information carried in the second WUS is used to indicate whether the terminal device listens to the DCI for MCCH modification notification.

In some alternative embodiments, the transmission window is a window within an MCCH modification period.

In some optional embodiments, in a case where the transmission window is an MCCH transmission window, the search space of the MCCH modification notification DCI is the same as the search space of the MCCH DCI.

In some alternative embodiments, the second WUS is heard by the terminal device within a WUS duration, and the deviation of the start position or the end position of the WUS duration from the start position of the transmission window is a first deviation.

In some optional embodiments, the MCCH transmission window is used to transmit MCCH DCI.

In some optional embodiments, the receiving unit 701 is further configured to receive first configuration information, where the first configuration information includes configuration information of a first WUS or a second WUS, and the configuration information of the first WUS or the second WUS includes at least one of: the length of the WUS duration, the starting position or the ending position of the WUS duration, respectively.

In some alternative embodiments, the first configuration information is carried in a system information block SIB or MCCH signaling.

In some alternative embodiments, the first WUS or the second WUS is scrambled by WUS RNTI in case the first WUS or the second WUS belongs to DCI.

In some alternative embodiments, the apparatus further comprises: a determining unit 702, configured to determine to monitor the MCCH DCI following the first WUS and/or receive the MCCH signaling following the first WUS if the value of the first information is the first value; and if the value of the first information is a second value, determining not to monitor the MCCH DCI behind the first WUS and/or not to receive the MCCH signaling behind the first WUS.

In some alternative embodiments, the apparatus further comprises: a determining unit 702, configured to determine to monitor an MCCH change notification DCI following the second WUS if the value of the second information is the first value; and if the value of the second information is the second value, determining not to monitor the DCI of the MCCH change notification behind the second WUS.

In some optional embodiments, the first indication information includes third information, the third information being used to indicate at least one of: MBS business with changed MBS configuration and MBS business with unchanged MBS configuration.

In some optional embodiments, the third information is a first bitmap, where each bit in the first bitmap corresponds to identification information of one MBS service; the value of the bit is used for indicating whether the MBS service corresponding to the bit is changed in MBS configuration.

In some optional embodiments, the identification information of the MBS service includes at least one of the following: MBS session identification of MBS service, TMGI of MBS service, MBS index of MBS service.

In some alternative embodiments, the apparatus further comprises: a determining unit 702, configured to:

if the terminal equipment determines that the first MBS service added by the terminal equipment is changed in MBS configuration based on the first bit map under the condition that the first signaling is first DCI, determining that the MCCH signaling needs to be acquired again; if the terminal equipment determines that the first MBS service added by the terminal equipment is not changed in MBS configuration based on the first bit map, the MCCH signaling is determined not to be required to be acquired again;

if the first signaling is the first WUS, if the terminal device determines, based on the first bitmap, that the first MBS service added by the terminal device has changed MBS configuration, it is determined that the MCCH DCI needs to be monitored and/or the MCCH signaling needs to be reacquired; if the terminal equipment determines that the first MBS service added by the terminal equipment is not changed in MBS configuration based on the first bit map, determining that the MCCH DCI does not need to be monitored and/or the MCCH signaling is not required to be acquired again;

If the terminal equipment determines that the first MBS service added by the terminal equipment is changed in MBS configuration based on the first bit map under the condition that the first signaling is the second WUS, determining that the DCI needs to be monitored for MCCH change notification; if the terminal equipment determines that the first MBS service added by the terminal equipment does not change MBS configuration based on the first bit map, the terminal equipment determines that the MCCH change notification DCI does not need to be monitored.

if the terminal equipment determines that the MBS service group to which the first MBS service added by the terminal equipment belongs has changed MBS configuration based on the second bitmap under the condition that the first signaling is first DCI, determining that the MCCH signaling needs to be reacquired, and acquiring updated MBS configuration of the first MBS service based on the MCCH signaling; if the terminal equipment determines that the MBS service group to which the first MBS service added by the terminal equipment belongs does not change MBS configuration based on the second bit map, determining that the MCCH signaling does not need to be acquired again;

if the terminal equipment determines that the MBS service group to which the first MBS service added by the terminal equipment belongs has changed MBS configuration based on the second bit map under the condition that the first signaling is the first WUS, determining that the MCCH DCI needs to be monitored and/or acquiring the MCCH signaling again; if the terminal equipment determines that the MBS service group to which the first MBS service added by the terminal equipment belongs does not change MBS configuration based on the second bit map, the terminal equipment determines that the MCCH DCI does not need to be monitored and/or the MCCH signaling is not required to be acquired again;

If the terminal equipment determines that the MBS service group to which the first MBS service added by the terminal equipment belongs has changed MBS configuration based on the second bitmap under the condition that the first signaling is the second WUS, determining that the MCCH change notification DCI needs to be monitored; if the terminal equipment determines that the MBS service group to which the first MBS service added by the terminal equipment belongs does not change MBS configuration based on the second bit map, the terminal equipment determines that the MCCH change notification DCI does not need to be monitored.

In some optional embodiments, the receiving unit 701 is further configured to receive second configuration information, where the second configuration information is used to determine a correspondence between at least one MBS service and at least one MBS service group;

the apparatus further comprises: a determining unit 701, configured to determine, based on the second configuration information, an MBS service group to which the first MBS service to which the terminal device joins belongs.

In some alternative embodiments, the second configuration information is carried in SIB or MCCH signaling.

In some optional embodiments, the receiving unit 701 is further configured to receive third configuration information, where the third configuration information is used to determine a correspondence between a service group identifier and a service identifier;

The apparatus further comprises: a determining unit 701, configured to determine, based on the third configuration information, a service group identifier of an MBS service group to which the first MBS service added by the terminal device belongs; or determining the service group identifier of the MBS service group to which the first MBS service belongs based on the service identifier of the first MBS service added by the terminal equipment.

In some optional embodiments, the receiving unit 701 is further configured to obtain a value of a first tag, where the value of the first tag is increased by 1 when the content in the MCCH signaling is changed every time;

the apparatus further comprises: a determining unit 701, configured to determine whether the MCCH signaling needs to be reacquired based on the value of the first tag.

In some optional embodiments, the receiving unit 701 is configured to obtain the value of the first tag from SIB or MCCH DCI.

In some optional embodiments, the receiving unit 701 is configured to obtain the value of the first tag in an MCCH modification period.

In some optional embodiments, the initial value of the first label is 0, the maximum value of the first label is H, H is a positive integer, and the value of the first label returns to the initial value after reaching the maximum value.

In some optional embodiments, the determining unit 701 is configured to determine that the MCCH signaling does not need to be re-acquired if the value of the first tag stored in the terminal device is the same as the value of the acquired first tag; and if the value of the first label stored by the terminal equipment is different from the value of the acquired first label, determining that the MCCH signaling needs to be acquired again.

It should be understood by those skilled in the art that the above description of the device for notifying information change according to the embodiment of the present application may be understood with reference to the description of the method for notifying information change according to the embodiment of the present application.

Fig. 8 is a schematic diagram ii of the structure of the device for notifying information change provided in the embodiment of the present application, which is applied to a network device, as shown in fig. 8, where the device for notifying information change includes:

a sending unit 801, configured to send a first signaling to a terminal device, where the first signaling carries first indication information, where the first indication information is used to indicate at least one of the following:

whether the terminal equipment monitors the DCI or not;

whether the terminal equipment monitors MCCH DCI;

whether the terminal equipment reacquires the MCCH signaling;

In some alternative embodiments, the first DCI is scrambled by a first RNTI;

the first RNTI is an RNTI scrambling the MCCH DCI; or,

the first RNTI is an RNTI dedicated to scrambling the first DCI.

In some optional embodiments, the first signaling is a first WUS, and the first indication information carried in the first WUS is used to indicate whether the terminal device listens to the MCCH DCI and/or reacquires the MCCH signaling.

In some optional embodiments, the sending unit 801 is further configured to send first configuration information to the terminal device, where the first configuration information includes configuration information of a first WUS or a second WUS, and the configuration information of the first WUS or the second WUS includes at least one of: the length of the WUS duration, the starting position or the ending position of the WUS duration, respectively.

In some alternative embodiments, the first configuration information is carried in SIB or MCCH signaling.

In some optional embodiments, N bits in the first bit map correspond to identification information of N MBS services, where N is a positive integer;

the corresponding relation between N bits in the first bit map and the identification information of the N MBS services is agreed by a protocol; or,

the corresponding relation between the N bits in the first bit map and the identification information of the N MBS services is configured by the network equipment through SIB or MCCH signaling.

In some optional embodiments, the N bits in the first bit map correspond to the identification information of the N MBS services in order from low to high; or,

The N bits in the first bit map correspond to the identification information of the N MBS services in the order from the low bit to the high bit.

In some optional embodiments, M bits in the second bitmap correspond to MBS group identifiers of M MBS service groups, where M is a positive integer;

the corresponding relation between M bits in the second bit map and MBS group identifications of the M MBS service groups is agreed by a protocol; or,

the corresponding relation between M bits in the second bit map and MBS group identifications of the M MBS service groups is configured by network equipment through SIB or MCCH signaling.

In some optional embodiments, M bits in the second bitmap correspond to MBS group identifiers of the M MBS service groups in order from low to high; or,

and M bits in the second bit map correspond to MBS group identifications of the M MBS service groups in the order from the low bit to the high bit.

In some optional embodiments, the sending unit 801 is further configured to send second configuration information to the terminal device, where the second configuration information is used to determine a correspondence between at least one MBS service and at least one MBS service group.

In some optional embodiments, the sending unit 801 is further configured to send a value of the first tag, where the value of the first tag is increased by 1 each time the content in the MCCH signaling is changed.

In some optional embodiments, the value of the first tag is carried in SIB or MCCH DCI.

Fig. 9 is a schematic structural diagram of a communication device 900 provided in an embodiment of the present application. The communication device may be a terminal device or a network device. The communication device 900 shown in fig. 9 comprises a processor 910, from which the processor 910 may call and run a computer program to implement the method in the embodiments of the present application.

Optionally, as shown in fig. 9, the communication device 900 may also include a memory 920. Wherein the processor 910 may invoke and run a computer program from the memory 920 to implement the methods in the embodiments of the present application.

Wherein the memory 920 may be a separate device from the processor 910 or may be integrated in the processor 910.

Optionally, as shown in fig. 9, the communication device 900 may further include a transceiver 930, and the processor 910 may control the transceiver 930 to communicate with other devices, and in particular, may send information or data to other devices, or receive information or data sent by other devices.

Wherein transceiver 930 may include a transmitter and a receiver. Transceiver 930 may further include antennas, the number of which may be one or more.

Optionally, the communication device 900 may be specifically a network device in the embodiment of the present application, and the communication device 900 may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the communication device 900 may be specifically a mobile terminal/terminal device in the embodiment of the present application, and the communication device 900 may implement a corresponding flow implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein for brevity.

Fig. 10 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 1000 shown in fig. 10 includes a processor 1010, and the processor 1010 may call and run a computer program from a memory to implement the method in the embodiments of the present application.

Optionally, as shown in fig. 10, the chip 1000 may further include a memory 1020. Wherein the processor 1010 may call and run a computer program from the memory 1020 to implement the methods in embodiments of the present application.

The memory 1020 may be a separate device from the processor 1010 or may be integrated into the processor 1010.

Optionally, the chip 1000 may also include an input interface 1030. The processor 1010 may control the input interface 1030 to communicate with other devices or chips, and in particular, may obtain information or data sent by the other devices or chips.

Optionally, the chip 1000 may further include an output interface 1040. Wherein the processor 1010 may control the output interface 1040 to communicate with other devices or chips, and in particular, may output information or data to other devices or chips.

Optionally, the chip may be applied to a network device in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the chip may be applied to a mobile terminal/terminal device in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein for brevity.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

Fig. 11 is a schematic block diagram of a communication system 1100 provided by an embodiment of the present application. As shown in fig. 11, the communication system 1100 includes a terminal device 1110 and a network device 1120.

The terminal device 1110 may be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1120 may be used to implement the corresponding functions implemented by the network device in the above method, which are not described herein for brevity.

It should be appreciated that the processor of an embodiment of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

It will be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memory is exemplary but not limiting, and for example, the memory in the embodiments of the present application may be Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), direct RAM (DR RAM), and the like. That is, the memory in embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

Embodiments of the present application also provide a computer-readable storage medium for storing a computer program.

Optionally, the computer readable storage medium may be applied to a network device in the embodiments of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the network device in each method in the embodiments of the present application, which is not described herein for brevity.

Optionally, the computer readable storage medium may be applied to a mobile terminal/terminal device in the embodiments of the present application, and the computer program causes a computer to execute a corresponding procedure implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, which is not described herein for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to a network device in the embodiments of the present application, and the computer program instructions cause the computer to execute corresponding flows implemented by the network device in the methods in the embodiments of the present application, which are not described herein for brevity.

Optionally, the computer program product may be applied to a mobile terminal/terminal device in the embodiments of the present application, and the computer program instructions cause a computer to execute corresponding processes implemented by the mobile terminal/terminal device in the methods in the embodiments of the present application, which are not described herein for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to a network device in the embodiments of the present application, and when the computer program runs on a computer, the computer is caused to execute a corresponding flow implemented by the network device in each method in the embodiments of the present application, which is not described herein for brevity.

Optionally, the computer program may be applied to a mobile terminal/terminal device in the embodiments of the present application, where the computer program when run on a computer causes the computer to execute corresponding processes implemented by the mobile terminal/terminal device in the methods in the embodiments of the present application, and for brevity, will not be described herein.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method of notifying of an information change, the method comprising:

the terminal equipment receives a first signaling, wherein the first signaling carries first indication information, and the first indication information is used for indicating at least one of the following:

whether the terminal equipment monitors the multicast control channel MCCH to change and inform downlink control information DCI;

whether the terminal equipment monitors MCCH DCI;

whether the terminal equipment reacquires the MCCH signaling;

the MCCH change notification DCI is used to notify MCCH change, the MCCH DCI is used to schedule MCCH, the MCCH is used to carry MCCH signaling, and the MCCH signaling includes one or more MBS configurations.
The method of claim 1, wherein the first signaling is first DCI, and the first indication information carried in the first DCI is used to indicate whether the terminal device reacquires MCCH signaling.
The method of claim 2, wherein the first DCI is scrambled by a first radio network temporary identity, RNTI;

the first RNTI is an RNTI scrambling the MCCH DCI; or,

the first RNTI is an RNTI dedicated to scrambling the first DCI.
The method of claim 3, wherein, in case the first RNTI is an RNTI scrambling MCCH DCI,

the first DCI carries second indication information, and the second indication information is used for indicating whether the first DCI is used for notifying MCCH change or scheduling MCCH.
The method of claim 1, wherein the first signaling is a first wake-up signal WUS, and the first indication information carried in the first WUS is used to indicate whether the terminal device listens to MCCH DCI and/or reacquires MCCH signaling.
The method of claim 5, wherein the first WUS is associated with one MCCH transmission window, the first WUS being located before its associated MCCH transmission window.
The method of claim 5, wherein the first WUS associates K MCCH transmission windows, the first WUS being located before its associated K MCCH transmission windows, K being an integer greater than 1.
The method of claim 7, wherein the value of K is configured by a network device.
The method of claim 7 or 8, wherein a starting position of a first MCCH transmission window of the K MCCH transmission windows is configured by a network device.
The method according to any of claims 7 to 9, wherein the first WUS is heard by the terminal device over a WUS duration, the deviation of the start position or end position of the WUS duration relative to the start position of a first MCCH transmission window of the K MCCH transmission windows being a first deviation.
The method of claim 5, wherein the first WUS is associated with a transmission period, the first WUS being located before its associated transmission period.
The method of claim 11, wherein a length of the transmission period is configured by a network device.
The method of claim 11 or 12, wherein the start position of the transmission period is determined based on the length of the transmission period.
The method of any of claims 11 to 13, wherein the first WUS is heard by the terminal device over a WUS duration, a deviation of a starting or ending position of the WUS duration from a starting position of the transmission period being a first deviation.
The method of any of claims 11-14, wherein the transmission period comprises L MCCH transmission windows, L being an integer greater than 1.
The method of claim 1, wherein the first signaling is a second WUS, and the first indication information carried in the second WUS is used to indicate whether the terminal device listens to MCCH change notification DCI.
The method of claim 16, wherein the second WUS is associated with a transmission window for transmitting MCCH change notification DCI, the second WUS being located before its associated transmission window.
The method of claim 17, wherein the transmission window is one window within an MCCH modification period.
The method of claim 17 or 18, wherein, in the case where the transmission window is an MCCH transmission window, the search space of the MCCH change notification DCI is the same as the search space of the MCCH DCI.
The method of any of claims 17 to 19, wherein the second WUS is heard by the terminal device over a WUS duration, a deviation of a starting or ending position of the WUS duration from a starting position of the transmission window being a first deviation.
The method of any of claims 6 to 10, 15, 19, wherein the MCCH transmission window is used for transmitting MCCH DCI.
The method of any one of claims 5 to 21, wherein the method further comprises:

the terminal device receives first configuration information, wherein the first configuration information comprises configuration information of a first WUS or a second WUS, and the configuration information of the first WUS or the second WUS comprises at least one of the following: the length of the WUS duration, the starting position or the ending position of the WUS duration, respectively.
The method of claim 22, wherein the first configuration information is carried in system information block, SIB, or MCCH, signaling.
The method of any one of claims 5 to 23, wherein the first WUS or the second WUS is scrambled by WUS RNTI in case the first WUS or the second WUS belongs to DCI.
The method of any of claims 5 to 15, wherein the first indication information comprises first information, a value of which is used to indicate whether to listen for MCCH DCI following the first WUS and/or whether to receive MCCH signaling following the first WUS.
The method of claim 25, wherein the method further comprises:

if the value of the first information is a first value, the terminal equipment determines to monitor the MCCH DCI behind the first WUS and/or receive the MCCH signaling behind the first WUS;

and if the value of the first information is the second value, the terminal equipment determines not to monitor the MCCH DCI behind the first WUS and/or not to receive the MCCH signaling behind the first WUS.
The method of any of claims 16 to 20, wherein the first indication information comprises second information, a value of which is used to indicate whether to listen for MCCH change notification DCI following the second WUS.
The method of claim 27, wherein the method further comprises:

if the value of the second information is the first value, the terminal equipment determines to monitor the DCI of the MCCH change notification behind the second WUS;

and if the value of the second information is the second value, the terminal equipment determines not to monitor the DCI of the MCCH change notification behind the second WUS.
The method of any of claims 2 to 24, wherein the first indication information comprises third information indicating at least one of: MBS business with changed MBS configuration and MBS business with unchanged MBS configuration.
The method of claim 29, wherein the third information is a first bitmap, and each bit in the first bitmap corresponds to identification information of one MBS service; the value of the bit is used for indicating whether the MBS service corresponding to the bit is changed in MBS configuration.
The method of claim 30, wherein the identification information of the MBS service comprises at least one of: MBS session identification of MBS service, TMGI of MBS service, MBS index of MBS service.
The method of claim 30 or 31, wherein N bits in the first bit map correspond to identification information of N MBS services, N is a positive integer;

the corresponding relation between N bits in the first bit map and the identification information of the N MBS services is agreed by a protocol; or,

the corresponding relation between the N bits in the first bit map and the identification information of the N MBS services is configured by the network equipment through SIB or MCCH signaling.
The method of claim 32, wherein,

the N bits in the first bit map correspond to the identification information of the N MBS services from the low bit to the high bit in the order from the low bit to the high bit; or,

The N bits in the first bit map correspond to the identification information of the N MBS services in the order from the low bit to the high bit.
The method of any one of claims 30 to 33, wherein the method further comprises:

if the terminal equipment determines that the first MBS service added by the terminal equipment is changed in MBS configuration based on the first bit map under the condition that the first signaling is first DCI, the terminal equipment determines that the MCCH signaling needs to be acquired again; if the terminal equipment determines that the first MBS service added by the terminal equipment is not changed in MBS configuration based on the first bit map, the terminal equipment determines that the MCCH signaling does not need to be acquired again;

if the first signaling is the first WUS, if the terminal device determines, based on the first bitmap, that the first MBS service added by the terminal device has changed MBS configuration, the terminal device determines that the MCCH DCI needs to be monitored and/or the MCCH signaling needs to be reacquired; if the terminal equipment determines that the first MBS service added by the terminal equipment is not changed in MBS configuration based on the first bit map, the terminal equipment determines that the MCCH DCI does not need to be monitored and/or the MCCH signaling is not acquired again;

If the terminal equipment determines that the first MBS service added by the terminal equipment is changed in MBS configuration based on the first bit map under the condition that the first signaling is the second WUS, the terminal equipment determines that the DCI needs to monitor MCCH change notification; if the terminal equipment determines that the first MBS service added by the terminal equipment does not change MBS configuration based on the first bit map, the terminal equipment determines that the MCCH change notification DCI does not need to be monitored.
The method of claim 29, wherein the third information is a second bitmap, each bit in the second bitmap corresponding to an MBS group identifier of an MBS service group; the value of the bit is used for indicating whether the MBS service group corresponding to the bit is changed in MBS configuration.
The method of claim 35, wherein M bits in the second bitmap correspond to MBS group identities of M MBS service groups, M being a positive integer;

the corresponding relation between M bits in the second bit map and MBS group identifications of the M MBS service groups is agreed by a protocol; or,

the corresponding relation between M bits in the second bit map and MBS group identifications of the M MBS service groups is configured by network equipment through SIB or MCCH signaling.
The method of claim 36, wherein,

the M bits in the second bit map correspond to MBS group identifications of the M MBS service groups in the order from low to high; or,

and M bits in the second bit map correspond to MBS group identifications of the M MBS service groups in the order from the low bit to the high bit.
The method of any one of claims 35 to 37, wherein the method further comprises:

if the terminal equipment determines that the MBS service group to which the first MBS service added by the terminal equipment belongs has changed MBS configuration based on the second bitmap under the condition that the first signaling is first DCI, the terminal equipment determines that the MCCH signaling needs to be reacquired, and acquires updated MBS configuration of the first MBS service based on the MCCH signaling; if the terminal equipment determines that the MBS service group to which the first MBS service added by the terminal equipment belongs does not change MBS configuration based on the second bit map, the terminal equipment determines that the MCCH signaling does not need to be acquired again;

if the terminal equipment determines that the MBS service group to which the first MBS service added by the terminal equipment belongs has changed MBS configuration based on the second bitmap under the condition that the first signaling is the first WUS, the terminal equipment determines that the MCCH DCI needs to be monitored and/or the MCCH signaling needs to be reacquired; if the terminal equipment determines that the MBS service group to which the first MBS service added by the terminal equipment belongs does not change MBS configuration based on the second bit map, the terminal equipment determines that the MCCH DCI does not need to be monitored and/or the MCCH signaling is not required to be acquired again;

If the terminal equipment determines that the MBS service group to which the first MBS service added by the terminal equipment belongs has changed MBS configuration based on the second bitmap under the condition that the first signaling is the second WUS, the terminal equipment determines that the MCCH change notification DCI needs to be monitored; if the terminal equipment determines that the MBS service group to which the first MBS service added by the terminal equipment belongs does not change MBS configuration based on the second bit map, the terminal equipment determines that the MCCH change notification DCI does not need to be monitored.
The method of any one of claims 35 to 38, wherein the method further comprises:

the terminal equipment receives second configuration information, wherein the second configuration information is used for determining the corresponding relation between at least one MBS service and at least one MBS service group;

and the terminal equipment determines the MBS service group to which the first MBS service added by the terminal equipment belongs based on the second configuration information.
The method of claim 39, wherein the second configuration information is carried in SIB or MCCH signaling.
The method of any one of claims 35 to 38, wherein the method further comprises:

The terminal equipment receives third configuration information, wherein the third configuration information is used for determining the corresponding relation between the service group identifier and the service identifier; the terminal equipment determines a service group identifier of an MBS service group to which the first MBS service added by the terminal equipment belongs based on the third configuration information; or,

the terminal equipment determines the service group identifier of the MBS service group to which the first MBS service belongs based on the service identifier of the first MBS service added by the terminal equipment.
The method of any one of claims 1 to 41, wherein the method further comprises:

the terminal equipment obtains the value of a first label, and the value of the first label is increased by 1 when the content in the MCCH signaling is changed once;

and the terminal equipment determines whether the MCCH signaling needs to be reacquired or not based on the value of the first label.
The method of claim 42, wherein the obtaining, by the terminal device, the value of the first tag includes:

and the terminal equipment acquires the value of the first tag from SIB or MCCH DCI.
The method according to claim 42 or 43, wherein the obtaining, by the terminal device, the value of the first tag includes:

And the terminal equipment acquires the value of the first tag in the MCCH modification period.
The method of any one of claims 42 to 44, wherein the initial value of the first tag is 0, the maximum value of the first tag is H, H is a positive integer, and the value of the first tag returns to the initial value after reaching the maximum value.
The method of any one of claims 42 to 45, wherein the determining, by the terminal device, whether the MCCH signaling needs to be reacquired based on the value of the first tag, comprises:

if the value of the first label stored by the terminal equipment is the same as the value of the acquired first label, determining that the MCCH signaling does not need to be acquired again;

and if the value of the first label stored by the terminal equipment is different from the value of the acquired first label, determining that the MCCH signaling needs to be acquired again.
A method of notifying of an information change, the method comprising:

the network equipment sends a first signaling to the terminal equipment, wherein the first signaling carries first indication information, and the first indication information is used for indicating at least one of the following:

whether the terminal equipment monitors the DCI or not;

whether the terminal equipment monitors MCCH DCI;

Whether the terminal equipment reacquires the MCCH signaling;

the MCCH change notification DCI is used to notify MCCH change, the MCCH DCI is used to schedule MCCH, the MCCH is used to carry MCCH signaling, and the MCCH signaling includes one or more MBS configurations.
The method of claim 47, wherein the first signaling is first DCI, and the first indication information carried in the first DCI is used to indicate whether the terminal device reacquires MCCH signaling.
The method of claim 48, wherein the first DCI is scrambled by a first RNTI;

the first RNTI is an RNTI scrambling the MCCH DCI; or,

the first RNTI is an RNTI dedicated to scrambling the first DCI.
The method of claim 49, wherein, in the case where the first RNTI is an RNTI scrambling MCCH DCI,

the first DCI carries second indication information, and the second indication information is used for indicating whether the first DCI is used for notifying MCCH change or scheduling MCCH.
The method of claim 47, wherein the first signaling is a first WUS, and the first indication information carried in the first WUS is used to indicate whether the terminal device listens for MCCH DCI and/or reacquires MCCH signaling.
The method of claim 51, wherein the first WUS is associated with one MCCH transmission window, the first WUS being located before its associated MCCH transmission window.
The method of claim 51, wherein the first WUS associates K MCCH transmission windows, the first WUS being located before its associated K MCCH transmission windows, K being an integer greater than 1.
The method of claim 53, wherein the value of K is configured by a network device.
The method of claim 53 or 54, wherein a starting position of a first MCCH transmission window of the K MCCH transmission windows is configured for a network device.
The method of any of claims 53-55, wherein the first WUS is heard by the terminal device over a WUS duration, a deviation of a starting position or an ending position of the WUS duration from a starting position of a first one of the K MCCH transmission windows being a first deviation.
The method of claim 51, wherein the first WUS is associated with a transmission period, the first WUS being located before its associated transmission period.
The method of claim 57, wherein the length of the transmission period is configured by a network device.
The method of claim 57 or 58, wherein a start position of the transmission period is determined based on a length of the transmission period.
The method of any one of claims 57 to 59, wherein the first WUS is monitored by the terminal device for a WUS duration, a deviation of a starting or ending position of the WUS duration from a starting position of the transmission period being a first deviation.
The method of any one of claims 57-60, wherein the transmission period comprises L MCCH transmission windows, L being an integer greater than 1.
The method of claim 47, wherein the first signaling is a second WUS, and the first indication information carried in the second WUS is used to indicate whether the terminal device listens for MCCH change notification DCI.
The method of claim 62, wherein the second WUS is associated with a transmission window for transmitting MCCH change notification DCI, the second WUS being located before its associated transmission window.
The method of claim 63, wherein the transmission window is one window within an MCCH modification period.
The method of claim 63 or 64, wherein, in the case where the transmission window is an MCCH transmission window, the search space of the MCCH change notification DCI is the same as the search space of the MCCH DCI.
The method of any one of claims 63 to 65, wherein the second WUS is heard by the terminal device over a WUS duration, a deviation of a starting or ending position of the WUS duration from a starting position of the transmission window being a first deviation.
The method of any of claims 52-56, 61, 65, wherein the MCCH transmission window is used for transmitting MCCH DCI.
The method of any one of claims 51 to 67, wherein the method further comprises:

the network device sends first configuration information to the terminal device, wherein the first configuration information comprises configuration information of a first WUS or a second WUS, and the configuration information of the first WUS or the second WUS comprises at least one of the following: the length of the WUS duration, the starting position or the ending position of the WUS duration, respectively.
The method of claim 68, wherein the first configuration information is carried in SIB or MCCH signaling.
The method of any one of claims 51 to 69, wherein the first WUS or the second WUS is scrambled by WUS RNTI in the case that the first WUS or the second WUS belongs to DCI.
The method of any one of claims 51 to 61, wherein the first indication information comprises first information, a value of which is used to indicate whether to listen for MCCH DCI following the first WUS and/or whether to receive MCCH signaling following the first WUS.
The method of any one of claims 62 to 66, wherein the first indication information comprises second information, a value of which is used to indicate whether to listen for MCCH change notification DCI following the second WUS.
The method of any one of claims 48 to 70, wherein the first indication information comprises third information indicating at least one of: MBS business with changed MBS configuration and MBS business with unchanged MBS configuration.
The method of claim 73, wherein the third information is a first bitmap, and each bit in the first bitmap corresponds to identification information of one MBS service; the value of the bit is used for indicating whether the MBS service corresponding to the bit is changed in MBS configuration.
The method of claim 74, wherein the identification information of the MBS service comprises at least one of: MBS session identification of MBS service, TMGI of MBS service, MBS index of MBS service.
The method of claim 74 or 75, wherein N bits in the first bitmap correspond to identification information of N MBS services, N is a positive integer;

the corresponding relation between N bits in the first bit map and the identification information of the N MBS services is agreed by a protocol; or,

the corresponding relation between the N bits in the first bit map and the identification information of the N MBS services is configured by the network equipment through SIB or MCCH signaling.
The method of claim 76, wherein,

the N bits in the first bit map correspond to the identification information of the N MBS services from the low bit to the high bit in the order from the low bit to the high bit; or,

the N bits in the first bit map correspond to the identification information of the N MBS services in the order from the low bit to the high bit.
The method of claim 73, wherein the third information is a second bitmap, each bit in the second bitmap corresponding to an MBS group identifier of an MBS service group; the value of the bit is used for indicating whether the MBS service group corresponding to the bit is changed in MBS configuration.
The method of claim 78, wherein M bits in the second bitmap correspond to MBS group identities of M MBS service groups, M being a positive integer;

the corresponding relation between M bits in the second bit map and MBS group identifications of the M MBS service groups is agreed by a protocol; or,

the corresponding relation between M bits in the second bit map and MBS group identifications of the M MBS service groups is configured by network equipment through SIB or MCCH signaling.
The method of claim 79, wherein,

the M bits in the second bit map correspond to MBS group identifications of the M MBS service groups in the order from low to high; or,

and M bits in the second bit map correspond to MBS group identifications of the M MBS service groups in the order from the low bit to the high bit.
The method of any one of claims 78 to 80, wherein the method further comprises:

the network device sends second configuration information to the terminal device, where the second configuration information is used to determine a correspondence between at least one MBS service and at least one MBS service group.
The method of claim 81, wherein the second configuration information is carried in SIB or MCCH signaling.
The method of any one of claims 47 to 82, wherein the method further comprises:

and the network equipment sends the value of the first label, and the value of the first label is increased by 1 when the content in the MCCH signaling is changed once.
The method of claim 83, wherein the value of the first tag is carried in SIB or MCCH DCI.
The method of claim 83 or 84, wherein the initial value of the first tag is 0, the maximum value of the first tag is H, H is a positive integer, and the first tag returns to the initial value after reaching the maximum value.
An apparatus for notifying information change, applied to a terminal device, the apparatus comprising:

the receiving unit is configured to receive a first signaling, where the first signaling carries first indication information, and the first indication information is used to indicate at least one of the following:

whether the terminal equipment monitors the DCI or not;

whether the terminal equipment monitors MCCH DCI;

whether the terminal equipment reacquires the MCCH signaling;

the MCCH change notification DCI is used to notify MCCH change, the MCCH DCI is used to schedule MCCH, the MCCH is used to carry MCCH signaling, and the MCCH signaling includes one or more MBS configurations.
An apparatus for notifying a network device of a change of information, the apparatus comprising:

a sending unit, configured to send a first signaling to a terminal device, where the first signaling carries first indication information, where the first indication information is used to indicate at least one of the following:

whether the terminal equipment monitors the DCI or not;

whether the terminal equipment monitors MCCH DCI;

whether the terminal equipment reacquires the MCCH signaling;

the MCCH change notification DCI is used to notify MCCH change, the MCCH DCI is used to schedule MCCH, the MCCH is used to carry MCCH signaling, and the MCCH signaling includes one or more MBS configurations.
A terminal device, comprising: a processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory, performing the method of any of claims 1 to 46.
A network device, comprising: a processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory, performing the method of any of claims 47 to 85.
A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 1 to 46.
A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 47 to 85.
A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 45.
A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 47 to 85.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 46.
A computer program product comprising computer program instructions which cause a computer to perform the method of any one of claims 47 to 85.
A computer program which causes a computer to perform the method of any one of claims 1 to 46.
A computer program which causes a computer to perform the method of any one of claims 47 to 85.