WO2023208048A1

WO2023208048A1 - Cell handover method and apparatus, terminal, and network side device

Info

Publication number: WO2023208048A1
Application number: PCT/CN2023/090891
Authority: WO
Inventors: 宋二浩
Original assignee: 维沃移动通信有限公司
Priority date: 2022-04-29
Filing date: 2023-04-26
Publication date: 2023-11-02
Also published as: CN117014976A

Abstract

The present application relates to the field of mobile communications, and discloses a cell handover method and apparatus, a terminal, and a network side device. The cell handover method of embodiments of the present application comprises: when layer 1 or layer 2 handover of a first cell group occurs in a terminal, the terminal obtains target RRC signaling carrying first indication information, wherein the first indication information is used for instructing the terminal to apply a configuration, associated with the first cell group, in the target RRC signaling, and a configuration, associated with the first cell group, in subsequently received RRC signaling.

Description

Cell switching method, device, terminal and network side equipment

cross reference

This application requires the priority of a Chinese patent application submitted to the China Patent Office on April 29, 2022, with the application number 202210468975.1 and the invention name "cell switching method, device, terminal and network side equipment". The entire content of the application is approved This reference is incorporated into this application.

Technical field

This application belongs to the field of mobile communication technology, and specifically relates to a cell switching method, device, terminal and network side equipment.

Background technique

The New Radio access network splits the base station, such as gNB, into a central unit (Centralized Unit, CU) and a distributed unit (Distributed Unit, DU), and connects them through the F1 interface. A gNB contains only one CU, including one or more DUs, and one DU corresponds to one or more cells (Cell). CU includes the Packet Data Convergence Protocol (PDCP) layer and the protocol stack below, such as the PDCP layer and the Radio Resource Control (Radio Resource Control, RRC) layer. DU includes the protocol stack below the PDCP layer, such as the Radio Link Control (RLC) layer, the Media Access Control (Medium Access Control, MAC) layer, and the Physical (Physical, PHY) layer.

When the terminal (also known as User Equipment (UE)) performs Layer 1 or Layer 2 (Intra-DU L1/L2) switching within the distribution unit, in order to ensure that data is not interrupted, the MAC layer of the UE can be used after the switching is completed. No reset. However, since the Radio Resource Control (RRC) signaling from the source cell may remain in the UE's MAC buffer, and the UE has already switched to the target cell, the RRC of the source cell is applied. There may be errors in the configuration of signaling.

Contents of the invention

Embodiments of the present application provide a cell handover method, device, terminal and network side equipment, which can solve the problem that the configuration in the RRC signaling of the source cell may be applied when the UE has been handed over to the target cell.

In a first aspect, a cell switching method is provided, which is applied to a terminal. The method includes: when the terminal switches layer 1 or layer 2 of the first cell group, the terminal obtains the target RRC carrying the first indication information. signaling; its , the first indication information is used to instruct the terminal to apply the configuration associated with the first cell group in the target RRC signaling and the configuration associated with the first cell group in the subsequently received RRC signaling. associated configuration.

In a second aspect, a cell switching device is provided, including: an execution module for executing layer 1 or layer 2 switching of the first cell group; a configuration module for obtaining target RRC signaling carrying first indication information; wherein , the first indication information is used to instruct to apply the configuration associated with the first cell group in the target RRC signaling, and to apply the configuration associated with the first cell group in the subsequently received RRC signaling. configuration.

In a third aspect, a cell switching method is provided, which is applied to a network side device. The method includes: the network side device initiates a layer 1 or layer 2 handover of the first cell group to the terminal; the network side device determines that the first cell group is switched. After the layer 1 or layer 2 handover of a cell group is completed, target RRC signaling is sent to the terminal; wherein the target RRC signaling carries first indication information, and the first indication information is used to instruct the terminal to apply The configuration associated with the first cell group in the target RRC signaling, and the configuration associated with the first cell group in the subsequently sent RRC signaling.

In a fourth aspect, a cell switching device is provided, including: a first transmission module, configured to initiate a layer 1 or layer 2 switching of a first cell group to a terminal; a second transmission module, configured to determine whether the first cell After the group's layer 1 or layer 2 handover is completed, target RRC signaling is sent to the terminal; wherein the target RRC signaling carries first indication information, and the first indication information is used to indicate that the terminal is applied in the The configuration associated with the first cell group in the target RRC signaling, and the configuration associated with the first cell group in the subsequently sent RRC signaling.

In a fifth aspect, a terminal is provided. The terminal includes a processor and a memory. The memory stores programs or instructions that can be run on the processor. When the program or instructions are executed by the processor, the following implementations are implemented: The steps of the method described in one aspect.

In a sixth aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is used to perform layer 1 or layer 2 handover of the first cell group, and the communication interface is used to obtain a message carrying the first indication information. Target RRC signaling.

In a seventh aspect, a network side device is provided. The network side device includes a processor and a memory. The memory stores programs or instructions that can be run on the processor. The program or instructions are executed by the processor. When implementing the steps of the method described in the first aspect.

In an eighth aspect, a network side device is provided, including a processor and a communication interface, wherein the processor is used to determine that the layer 1 or layer 2 handover of the first cell group is completed, and the communication interface is used to The terminal initiates a layer 1 or layer 2 handover of the first cell group; and sends target RRC signaling to the terminal after determining that the layer 1 or layer 2 handover of the first cell group is completed.

A ninth aspect provides a cell switching system, including: a terminal and a network side device. The terminal can be used to perform the steps of the cell switching method described in the first aspect. The network side device can be used to perform the steps of the third aspect. The steps of the cell switching method described in this aspect.

In a tenth aspect, a readable storage medium is provided. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method are implemented as described in the first aspect. The steps of the method described in the third aspect.

In an eleventh aspect, a chip is provided, the chip includes a processor and a communication interface, the communication interface and the The processor is coupled, and the processor is used to run programs or instructions, implement the method described in the first aspect, or implement the method described in the third aspect.

In a twelfth aspect, a computer program/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement as described in the first aspect The cell switching method, or the steps of implementing the cell switching method of the third aspect.

In this embodiment of the present application, when a layer 1 or layer 2 handover of the first cell group occurs, target RRC signaling carrying first indication information is obtained, and the first indication information is used to instruct the terminal to apply The configuration associated with the first cell group in the target RRC signaling, and the configuration associated with the first cell group in the subsequently received RRC signaling, thereby enabling the terminal to avoid Errors caused by applying the configuration in the RRC signaling of the source cell.

Description of the drawings

Figure 1 is a schematic structural diagram of a wireless communication system applicable to the embodiment of the present application;

Figure 2 is a schematic flow chart of a cell switching method provided by an embodiment of the present application;

Figure 3 is a schematic structural diagram of a cell switching device provided by an embodiment of the present application;

Figure 4 is a schematic flow chart of another cell switching method provided by an embodiment of the present application;

Figure 5 is a schematic structural diagram of another cell switching device provided by an embodiment of the present application;

Figure 6 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

Figure 7 is a schematic structural diagram of a terminal that implements an embodiment of the present application;

Figure 8 is a schematic structural diagram of a network side device that implements an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art fall within the scope of protection of this application.

The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and that "first" and "second" are distinguished objects It is usually one type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the related objects are in an "or" relationship.

It is worth pointing out that the technology described in the embodiments of this application is not limited to long-term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-A) system can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (Time Division Multiple Access, TDMA) , Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used not only for the above-mentioned systems and radio technologies, but also for other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in much of the following description, but these techniques can also be applied to applications other than NR system applications, such as 6th ^generation Generation, 6G) communication system.

Figure 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a palmtop computer, a netbook, or a super mobile personal computer. (ultra-mobile personal computer, UMPC), mobile Internet device (Mobile Internet Device, MID), augmented reality (AR)/virtual reality (VR) equipment, robots, wearable devices (Wearable Device) , Vehicle User Equipment (VUE), Pedestrian User Equipment (PUE), smart home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (personal computer, PC), teller machine or self-service machine and other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets) bracelets, smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network side device 12 may include an access network device or a core network device, where the access network device may also be called a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a wireless access network unit. Access network equipment may include a base station, a Wireless Local Area Network (WLAN) access point or a WiFi node, etc. The base station may be called a Node B, an evolved Node B (eNB), or an access point. , Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home B node, home evolved B Node, Transmission Reception Point (TRP) or some other suitable terminology in the field, as long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiment of this application The description only takes the base station in the NR system as an example, and does not limit the specific type of base station. Core network equipment may include but is not limited to at least one of the following: core network nodes, core network functions, mobility management entities (Mobility Management Entity, MME), access mobility management functions (Access and Mobility Management Function, AMF), session management functions (Session Management Function, SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Service Discovery function (Edge Application Server Discovery Function, EASDF), unified data management (Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), local NEF (Local NEF, or L-NEF), binding support function (Binding Support Function, BSF), application function (Application Function, AF), etc. It should be noted that in the embodiment of this application, only the core network equipment in the NR system is used as an example for introduction, and the specific type of the core network equipment is not limited.

The cell switching method, device, terminal and network side equipment provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through some embodiments and application scenarios.

As shown in Figure 2, this embodiment of the present application provides a cell switching method. The execution subject of this method is a terminal. In other words, this method can be executed by software or hardware installed on the terminal. The method includes the following steps.

S210. When a layer 1 or layer 2 handover of the first cell group occurs in the terminal, the terminal obtains the target RRC signaling carrying the first indication information; wherein the first indication information is used to instruct the terminal to apply The configuration associated with the first cell group in the target RRC signaling, and the configuration associated with the first cell group in the subsequently received RRC signaling.

In one implementation, the terminal may receive a layer 1 or layer 2 (L1/L2) switching command of the first cell group, perform an L1/L2 switching process, and switch from the source cell to the target cell.

It should be understood that based on dual connectivity (Dual Connectivity, DC) technology, two network nodes are provided for the UE, that is, the resources of the access network device. One of the network nodes is called the master node (Master Node, MN), and the other one is called the master node (MN). The network node is called a secondary node (Secondary Node, SN). At each network node, carrier aggregation technology (Carrier Aggregation, CA) is used, that is, the UE is configured with a series of serving cells controlled by the node, called a Cell Group (CG). The master node controls the primary cell group (Master Cell Group, MCG), and the secondary node controls the secondary cell group (Secondary Cell Group, SCG). Each cell group contains a special cell (Special Cell, SpCell) and a series of secondary cells (Secondary Cell, Scell). In MCG, the special cell is called Primary Cell (PCell), and in SCG, the special cell is called Primary Secondary Cell (PSCell). In a cell group, SpCell uses the primary carrier, while other secondary cells use secondary carriers. Resource scheduling within a cell group is performed by SpCell.

As mentioned above, the first cell group may be MCG or SCG. The L1/L2 handover process for MCG is used to switch the primary cell, and the L1/L2 handover process for SCG is used to switch the primary and secondary cells.

After completing the L1/L2 handover of the first cell group, the terminal may retrieve the received RRC signaling from the MAC buffer, and the RRC signaling may include performing the L1 switching of the first cell group at the terminal. The RRC signaling received before /L2 handover or during the handover is the RRC signaling of the source cell, and the RRC signaling received after the handover is completed is the RRC signaling of the target cell.

For the RRC signaling received before or during the L1/L2 handover, the configuration associated with the first cell group contained therein is the configuration corresponding to the source cell. In order to avoid that the configuration corresponding to the source cell is still applied after the handover is completed, in one implementation, before acquiring the target RRC signaling, the method further includes:

After starting to perform layer 1 or layer 2 handover of the first cell group, the terminal discards the configuration associated with the first cell group in the obtained RRC signaling, and applies the configuration except the first cell group. configuration associated with other cell groups. For example, if the first cell group is MCG, the terminal discards the configuration associated with MCG in the obtained RRC signaling. If the first cell group is SCG, the terminal discards the configuration in the obtained RRC signaling. Configuration associated with SCG. For the sake of simplicity, in the following embodiments, the configuration associated with the first cell group may be called configuration B, and the configurations associated with other cell groups may be called configuration A.

Until the terminal obtains the target RRC signaling, and applies the configuration B in the target RRC signaling and the configuration B in the subsequently received RRC signaling based on the first indication information carried in the target RRC signaling. This is equivalent to that after acquiring the target RRC signaling, the terminal applies all configuration parameters in the target RRC signaling and subsequently received RRC signaling.

It should be understood that, after determining that the L1/L2 handover of the first cell group is completed, the network side device will send the target RRC signaling carrying the first indication information to the terminal. The target RRC signaling sent by the network side device may specifically be the first RRC signaling sent to the terminal after it is determined that the L1/L2 handover of the first cell group is completed, carrying the first indication information.

It should be understood that the terminal can identify the cell group associated with the corresponding configuration according to the cell identifier (Identifier, ID) or cell group identifier (Cell Group ID) carried in the RRC signaling. If the carried cell identifier belongs to the first cell group, or the carried cell group identifier is the identifier of the first cell group, the configuration is determined to be configuration B; otherwise, the configuration is determined to be configuration A.

Optionally, after completing the L1/L2 handover of the first cell group, the terminal can also obtain a Non-Access Stratum (NAS) message from the MAC buffer. Before obtaining the target RRC signaling, the terminal The method further includes: when the first cell group is MCG, the terminal discards the obtained NAS message; and when the first cell group is SCG, the terminal applies the NAS message .

It can be known from the technical solutions of the above embodiments that in the case of layer 1 or layer 2 handover of the first cell group, the embodiment of the present application obtains the target RRC signaling carrying the first indication information, and the first indication information is used to Instruct the terminal to apply the configuration associated with the first cell group in the target RRC signaling and the configuration associated with the first cell group in the subsequently received RRC signaling, so that the terminal is switched to After entering the target cell, avoid errors caused by applying the configuration in the RRC signaling of the source cell.

Based on the above embodiment, optionally, after the terminal discards the configuration associated with the first cell group in the acquired RRC signaling and applies the configuration associated with other cell groups except the first cell group , the method also includes:

The terminal sends an RRC reconfiguration completion message to the network side device.

After completing the L1/L2 handover of the first cell group, if the terminal obtains configuration B in the RRC message, it discards configuration B in the RRC message and applies configuration A in the RRC message. Then, an RRC reconfiguration completion message is returned to the network side device, which is used to notify the network side device that part of the configuration has not been applied and/or characteristics of the unapplied configuration and/or reason information for not being applied.

In one implementation, the RRC reconfiguration completion message carries indication information, and the indication information is used to indicate At least one of the following:

Part of the configuration in the RRC signaling has not been applied;

Part of the configuration in the RRC signaling is applied;

The configuration associated with the first cell group in the RRC signaling has not been applied;

The configuration associated with other cell groups except the first cell group in the RRC signaling is applied;

Reason information for not being applied.

It can be known from the technical solutions of the above embodiments that in the embodiment of the present application, the terminal discards the configuration associated with the first cell group in the acquired RRC signaling, and applies other cell groups except the first cell group. After the associated configuration, an RRC reconfiguration completion message is returned to the network side device, which is used to notify the network side device that part of the configuration has not been applied, so that the network side device can send target RRC signaling, so that the terminal can Apply the configuration in the RRC signaling of the target cell in a timely manner.

Based on the above embodiment, optionally, the first indication information is configured based on at least one of the following:

The terminal, that is, the first indication information may be configured separately for each terminal (per UE);

The target signaling radio bearer (Signalling Radio Bearer, SRB), that is, the first indication information can be configured separately for each signaling radio bearer (per SRB);

The target logical channel (Logical Channel, LCH), that is, the first indication information may be configured separately for each logical channel (per LCH).

In one implementation, when the first indication information is configured per UE, the first indication information is used to instruct the corresponding terminal to stop discarding the target RRC signaling and configuration B in subsequent RRC signaling, That is, all configuration parameters in the target RRC signaling and subsequent RRC signaling, that is, configuration A and configuration B, are applied until L1/L2 handover is performed again.

When the first indication information is configured based on the terminal, that is, the terminal stops discarding the target RRC signaling and subsequent RRC after acquiring the target RRC signaling carrying the first indication information corresponding to the terminal. The configuration of the first cell group in the signaling, that is, the configuration associated with all cell groups in the target RRC signaling, and the configuration associated with all cell groups in the subsequently received RRC signaling, until L1/L2 is executed again switch.

In another implementation, when the first indication information is per SRB or per LCH configuration, if the first indication information corresponds to the target SRB or target LCH, then the first indication information is used to indicate The terminal stops discarding configuration B in the target RRC signaling and subsequent RRC signaling received through the target SRB or target LCH, that is, applying the target RRC signaling and subsequent RRC signaling received through the target SRB or target LCH. all configuration parameters in the command until L1/L2 switching is performed again.

In the case where the first indication information is configured based on the target signaling radio bearer or target logical channel, after acquiring the target RRC signaling carrying the first indication information, the terminal applies the target RRC signaling The configuration associated with all cell groups in the RRC signaling received subsequently through the target signaling radio bearer or the target logical channel, until the L1/L2 handover is performed again.

Correspondingly, for the network side device, in one embodiment, when the first indication information is based on the terminal, In the case of row configuration, the network side device carries the first indication information in the first RRC signaling sent to the terminal after determining that the L1/L2 handover of the first cell group is completed.

In another implementation manner, when the first indication information is configured based on the target signaling radio bearer or target logical channel, the network side device determines the L1/L2 of the first cell group. After the handover is completed, the first RRC signaling sent to the terminal through the target signaling radio bearer or the target logical channel carries the first indication information.

It can be known from the technical solutions of the above embodiments that in the embodiments of the present application, the first indication information can be configured based on the terminal, signaling radio bearer or logical channel, so that the terminal can achieve flexible configuration after switching to the target cell.

For the cell switching method provided by the embodiment of the present application, the execution subject may be a cell switching device. In the embodiment of the present application, the cell switching method performed by the cell switching device is used as an example to illustrate the cell switching device provided by the embodiment of the present application.

As shown in Figure 3, the cell switching device includes: an execution module 301 and a configuration module 302.

The execution module 301 is used to perform layer 1 or layer 2 handover of the first cell group; the configuration module 302 is used to obtain target RRC signaling carrying first indication information; wherein the first indication information is used to indicate The configuration associated with the first cell group in the target RRC signaling is applied, and the configuration associated with the first cell group in the subsequently received RRC signaling is applied.

Optionally, the configuration module 302 is also configured to discard the configuration associated with the first cell group in the obtained RRC signaling after starting to perform layer 1 or layer 2 handover of the first cell group, And apply configurations associated with other cell groups except the first cell group.

Optionally, the first cell group is MCG or SCG.

Before acquiring the target RRC signaling, the configuration module 302 is also used to:

When the first cell group is MCG, discard the obtained NAS message;

or,

When the first cell group is SCG, the obtained NAS message is applied.

It can be known from the technical solutions of the above embodiments that, after performing layer 1 or layer 2 handover of the first cell group, the embodiment of the present application obtains the target RRC signaling carrying the first indication information, and the first indication information is used to indicate the application The configuration associated with the first cell group in the target RRC signaling, and the configuration associated with the first cell group in the subsequently received RRC signaling, so that the cell switching device can , to avoid errors caused by applying the configuration in the RRC signaling of the source cell.

Based on the above embodiment, optionally, the configuration module 302 is also configured to send an RRC reconfiguration completion message to the network side device.

Optionally, the RRC reconfiguration complete message carries second indication information, and the second indication information is used to indicate at least one of the following:

Part of the configuration in the RRC signaling has not been applied;

Part of the configuration in the RRC signaling is applied;

Reason information for not being applied.

It can be known from the technical solutions of the above embodiments that in the embodiment of the present application, the cell switching device discards the configuration associated with the first cell group in the acquired RRC signaling, and applies other configurations except the first cell group. After the cell group association is configured, an RRC reconfiguration completion message is returned to the network side device, which is used to notify the network side device that part of the configuration has not been applied, so that the network side device sends target RRC signaling, so that the cell switching device switches to the target After entering the cell, the configuration in the RRC signaling of the target cell can be applied in a timely manner.

The cell switching device;

Target signaling radio bearer;

Target logical channel.

Optionally, in the case where the first indication information is configured based on the cell switching device, after acquiring the target RRC signaling carrying the first indication information, the configuration module 302 is further configured to: The configuration associated with all cell groups in the signaling, and the configuration associated with all cell groups in the subsequently received RRC signaling.

Optionally, in the case where the first indication information is configured based on the target signaling radio bearer or target logical channel, after acquiring the target RRC signaling carrying the first indication information, the configuration module 302 also uses The configuration applied to all cell group associations in the target RRC signaling, and the configuration associated with all cell groups in subsequent RRC signaling received through the target signaling radio bearer or the target logical channel.

It can be known from the technical solutions of the above embodiments that in the embodiments of the present application, the first indication information can be configured based on the cell switching device, the signaling radio bearer or the logical channel, so that the cell switching device can achieve flexible configuration after switching to the target cell. .

The cell switching device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or may be a component in the electronic device, such as an integrated circuit or chip. The electronic device may be a terminal or other devices other than the terminal. For example, terminals may include but are not limited to the types of terminals 11 listed above, and other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., which are not specifically limited in the embodiment of this application.

The cell switching device provided by the embodiment of the present application can implement each process implemented by the method embodiment in Figure 2 and achieve the same technical effect. To avoid duplication, details will not be described here.

As shown in Figure 4, this embodiment of the present application provides a cell switching method. The method is executed by a network-side device. In other words, the method can be executed by software or hardware installed on the network-side device. The method includes the following steps.

S410. The network side device initiates a Layer 1 or Layer 2 handover of the first cell group to the terminal;

S420. The network side device sends target RRC signaling to the terminal after determining that the layer 1 or layer 2 handover of the first cell group is completed; wherein the target RRC signaling carries first indication information, so The first indication information is used to instruct the terminal to apply the configuration associated with the first cell group in the target RRC signaling, and subsequent Configuration associated with the first cell group in the sent RRC signaling.

Optionally, the first cell group is MCG or SCG.

Steps S410-S420 can implement the method embodiment shown in Figure 2 and obtain the same technical effect, and the repeated parts will not be described again.

It can be known from the technical solutions of the above embodiments that the embodiments of the present application initiate layer 1 or layer 2 handover of the first cell group to the terminal; and then after it is determined that the layer 1 or layer 2 handover of the first cell group is completed, the The terminal sends target RRC signaling; wherein the target RRC signaling carries first indication information, and the first indication information is used to instruct the terminal to use the target RRC signaling with the first cell group. The associated configuration, as well as the configuration associated with the first cell group in the subsequently sent RRC signaling, thereby enabling the terminal to avoid errors caused by applying the configuration in the RRC signaling of the source cell after switching to the target cell.

Based on the above embodiment, optionally, after initiating a layer 1 or layer 2 handover of the first cell group to the terminal, the method further includes:

The network side device receives an RRC reconfiguration complete message from the terminal.

Part of the configuration in the RRC signaling has not been applied;

Part of the configuration in the RRC signaling is applied;

Reason information for not being applied.

The embodiments of the present application can implement the technical solution implemented by the above terminal side method and obtain the same technical effect, and the redundant parts will not be repeated here.

It can be known from the technical solutions of the above embodiments that the embodiments of the present application are used to notify the network side device that part of the configuration has not been applied by receiving the RRC reconfiguration completion message from the terminal, so that the network side device sends the target RRC signaling, thereby enabling After the terminal is handed over to the target cell, the configuration in the RRC signaling of the target cell can be applied in a timely manner.

the terminal;

Target signaling radio bearer;

Target logical channel.

Optionally, in the case where the first indication information is configured based on the terminal, the target RRC signaling is to send the signal to the terminal after it is determined that the layer 1 or layer 2 handover execution of the first cell group is completed. The first RRC signaling sent.

Optionally, in the case where the first indication information is configured based on the target signaling radio bearer or target logical channel, the target RRC signaling is determined after determining layer 1 or layer 2 of the first cell group. The first RRC signaling sent to the terminal through the target signaling radio bearer or target logical channel after the handover is completed.

The embodiments of the present application can implement the technical solution implemented by the above terminal side method and obtain the same technical effect. Repeat Some of them will not be repeated here.

As shown in Figure 5, the cell switching device includes: a first transmission module 501 and a second transmission module 502.

The first transmission module 501 is used to initiate a layer 1 or layer 2 handover of the first cell group to the terminal; the second transmission module 502 is used to determine that the layer 1 or layer 2 handover of the first cell group is completed. Then, target RRC signaling is sent to the terminal; wherein, the target RRC signaling carries first indication information, and the first indication information is used to instruct the terminal to use the target RRC signaling with the third indication information. The configuration associated with a cell group, and the configuration associated with the first cell group in the subsequently sent RRC signaling.

Optionally, the first cell group is MCG or SCG.

Based on the above embodiment, optionally, the second transmission module is also configured to receive an RRC reconfiguration complete message from the terminal.

Part of the configuration in the RRC signaling has not been applied;

Part of the configuration in the RRC signaling is applied;

Reason information for not being applied.

It can be seen from the technical solutions of the above embodiments that the embodiments of the present application receive an RRC reconfiguration completion message from the terminal to notify that part of the configuration has not been applied, so that the cell switching device sends target RRC signaling, thereby allowing the terminal to switch After arriving at the target cell, the configuration in the RRC signaling of the target cell can be applied in a timely manner.

the terminal;

Target signaling radio bearer;

Target logical channel.

Optionally, when the first indication information is configured based on the terminal, the target RRC signaling It is the first RRC signaling sent to the terminal after it is determined that the layer 1 or layer 2 handover of the first cell group is completed.

The cell switching device provided by the embodiment of the present application can implement each process implemented by the method embodiment in Figure 4 and achieve the same technical effect. To avoid duplication, details will not be described here.

Optionally, as shown in Figure 6, this embodiment of the present application also provides a communication device 600, which includes a processor 601 and a memory 602. The memory 602 stores programs or instructions that can be run on the processor 601, such as , when the communication device 600 is a terminal, when the program or instruction is executed by the processor 601, each step of the above cell switching method embodiment is implemented, and the same technical effect can be achieved. When the communication device 600 is a network-side device, when the program or instruction is executed by the processor 601, each step of the above cell switching method embodiment is implemented, and the same technical effect can be achieved. To avoid duplication, the details are not repeated here.

Embodiments of the present application also provide a terminal, including a processor and a communication interface. The processor is configured to perform layer 1 or layer 2 handover of the first cell group, and the communication interface is configured to obtain target RRC signaling carrying the first indication information. This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment. Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this terminal embodiment, and can achieve the same technical effect. Specifically, FIG. 7 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.

The terminal 700 includes but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, a processor 710, etc. At least some parts.

Those skilled in the art can understand that the terminal 700 may also include a power supply (such as a battery) that supplies power to various components. The power supply may be logically connected to the processor 710 through a power management system, thereby managing charging, discharging, and power consumption through the power management system. Management and other functions. The terminal structure shown in FIG. 7 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or some components may be combined or arranged differently, which will not be described again here.

It should be understood that in this embodiment of the present application, the input unit 704 may include a graphics processing unit (GPU) 7041 and a microphone 7042. The GPU 7041 is used for recording data generated by an image capture device (such as a camera) in the video capture mode or the image capture mode. The image data obtained from still pictures or videos is processed. The display unit 706 may include a display panel 7061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. 7061. The user input unit 707 includes a touch panel 7071 and at least one of other input devices 7072 . Touch panel 7071, also called touch screen. The touch panel 7071 may include two parts: a touch detection device and a touch controller. Other input devices 7072 may include but are not limited to physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be described again here.

In this embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 701 can transmit it to the processor 710 for processing; in addition, the radio frequency unit 701 can send uplink data to the network side device. Generally, the radio frequency unit 701 includes, but is not limited to, an antenna, amplifier, transceiver, coupler, low noise amplifier, duplexer, etc.

Memory 709 may be used to store software programs or instructions as well as various data. The memory 709 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, Image playback function, etc.) etc. Additionally, memory 709 may include volatile memory or non-volatile memory, or memory 709 may include both volatile and non-volatile memory. Among them, non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synch link DRAM) , SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM). Memory 709 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

The processor 710 may include one or more processing units; optionally, the processor 710 integrates an application processor and a modem processor, where the application processor mainly handles operations related to the operating system, user interface, application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the above-mentioned modem processor may not be integrated into the processor 710.

Among them, the radio frequency unit 701 is used to obtain the target RRC signaling carrying the first indication information;

Processor 710, configured to perform layer 1 or layer 2 handover of the first cell group; wherein the first indication information is used to indicate application of the configuration associated with the first cell group in the target RRC signaling, and the configuration associated with the first cell group in the subsequently received RRC signaling.

Optionally, the processor 710 is further configured to discard the configuration associated with the first cell group in the acquired RRC signaling after starting to perform layer 1 or layer 2 handover of the first cell group, And apply configurations associated with other cell groups except the first cell group.

Optionally, the first cell group is MCG or SCG.

Before acquiring the target RRC signaling, the processor 710 is also used to:

When the first cell group is MCG, discard the obtained NAS message;

or,

When the first cell group is SCG, the obtained NAS message is applied.

The embodiment of the present application can enable the terminal to avoid errors caused by applying the configuration in the RRC signaling of the source cell after switching to the target cell.

Based on the above embodiment, optionally, the radio frequency unit 701 is also configured to send an RRC reconfiguration completion message to the network side device.

Part of the configuration in the RRC signaling has not been applied;

Part of the configuration in the RRC signaling is applied;

Reason information for not being applied.

The embodiment of the present application enables the terminal to apply the configuration in the RRC signaling of the target cell in a timely manner after switching to the target cell.

The cell switching device;

Target signaling radio bearer;

Target logical channel.

Optionally, when the first indication information is configured based on the terminal, after acquiring the target RRC signaling carrying the first indication information, the processor 710 is further configured to: The configuration associated with all cell groups in the RRC signaling received subsequently, and the configuration associated with all cell groups in the subsequently received RRC signaling.

Optionally, in the case where the first indication information is configured based on the target signaling radio bearer or target logical channel, after acquiring the target RRC signaling carrying the first indication information, the processor 710 also uses The configuration applied to all cell group associations in the target RRC signaling, and the configuration associated with all cell groups in subsequent RRC signaling received through the target signaling radio bearer or the target logical channel.

The embodiment of the present application enables the terminal to implement flexible configuration after switching to the target cell.

An embodiment of the present application also provides a network side device, including a processor and a communication interface. The processor is used to determine that the layer 1 or layer 2 handover of the first cell group is completed, and the communication interface is used to initiate the first cell group to the terminal. Layer 1 or Layer 2 handover; sending target RRC signaling to the terminal after it is determined that the Layer 1 or Layer 2 handover of the first cell group is completed; wherein the target RRC signaling carries first indication information, The first indication information is used to instruct the terminal to apply the configuration associated with the first cell group in the target RRC signaling, and the configuration associated with the first cell group in the subsequently sent RRC signaling. . This network-side device embodiment corresponds to the above-mentioned network-side device method embodiment. Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this network-side device embodiment, and can achieve the same technical effect.

Specifically, the embodiment of the present application also provides a network side device. As shown in FIG. 8 , the network side device 800 includes: an antenna 81 , a radio frequency device 82 , a baseband device 83 , a processor 84 and a memory 85 . The antenna 81 is connected to the radio frequency device 82 . In the uplink direction, the radio frequency device 82 receives information through the antenna 81 and sends the received information to the baseband device 83 for processing. In the downlink direction, the baseband device 83 processes the information to be sent and sends it to the radio frequency device 82. The radio frequency device 82 processes the received information and then sends it out through the antenna 81.

The method performed by the network side device in the above embodiment can be implemented in the baseband device 83, which includes a baseband processor.

The baseband device 83 may include, for example, at least one baseband board on which multiple chips are disposed, as shown in FIG. Program to perform the network device operations shown in the above method embodiments.

The network side device may also include a network interface 86, which is, for example, a common public radio interface (CPRI).

Specifically, the network side device 800 in the embodiment of the present application also includes: instructions or programs stored in the memory 85 and executable on the processor 84. The processor 84 calls the instructions or programs in the memory 85 to execute the various operations shown in Figure 5. The method of module execution and achieving the same technical effect will not be described in detail here to avoid duplication.

Embodiments of the present application also provide a readable storage medium, which stores programs or instructions. When the program or instructions are executed by a processor, each process of the above cell switching method embodiment is implemented, and the same can be achieved. The technical effects will not be repeated here to avoid repetition.

Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disk or optical disk, etc.

An embodiment of the present application further provides a chip. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the above cell switching method embodiment. Each process can achieve the same technical effect. To avoid duplication, it will not be described again here.

It should be understood that the chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-chip or system-on-chip, etc.

Embodiments of the present application further provide a computer program/program product. The computer program/program product is stored in a storage medium. The computer program/program product is executed by at least one processor to implement the above embodiment of the cell switching method. Each process can achieve the same technical effect. To avoid repetition, we will not go into details here.

Embodiments of the present application also provide a cell switching system, including: a terminal and a network side device. The terminal can be used to perform the steps of the cell switching method as described above. The network side device can be used to perform the cell switching method as described above. Steps to switch methods.

It should be noted that, in this document, the terms "comprising", "comprises" or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or device that includes a series of elements not only includes those elements, and also includes other elements not expressly listed or included for such process, method, article or apparatus. inherent elements. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article or apparatus that includes that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions may be performed, for example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation. Based on this understanding, the technical solution of the present application can be embodied in the form of a computer software product that is essentially or contributes to the existing technology. The computer software product is stored in a storage medium (such as ROM/RAM, disk , CD), including several instructions to cause a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of this application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Inspired by this application, many forms can be made without departing from the purpose of this application and the scope protected by the claims, all of which fall within the protection of this application.

Claims

A cell switching method includes:

When a layer 1 or layer 2 handover of the first cell group occurs in the terminal, the terminal obtains the target RRC signaling carrying the first indication information; wherein the first indication information is used to instruct the terminal to apply the The configuration associated with the first cell group in the target RRC signaling, and the configuration associated with the first cell group in the subsequently received RRC signaling.
The method according to claim 1, wherein before acquiring the target RRC signaling, the method further includes:

After starting to perform layer 1 or layer 2 handover of the first cell group, the terminal discards the configuration associated with the first cell group in the obtained RRC signaling, and applies the configuration except the first cell group. configuration associated with other cell groups.
The method according to claim 2, wherein the terminal discards the configuration associated with the first cell group in the acquired RRC signaling, and applies the configuration associated with other cell groups except the first cell group. After configuration, the method also includes:

The terminal sends an RRC reconfiguration completion message to the network side device.
The method according to claim 3, wherein the RRC reconfiguration complete message carries second indication information, and the second indication information is used to indicate at least one of the following:

Part of the configuration in the RRC signaling has not been applied;

Part of the configuration in the RRC signaling is applied;

The configuration associated with the first cell group in the RRC signaling has not been applied;

The configuration associated with other cell groups except the first cell group in the RRC signaling is applied;

Reason information for not being applied.
The method according to claim 2, wherein the first indication information is configured based on at least one of the following:

the terminal;

Target signaling radio bearer;

Target logical channel.
The method according to claim 5, wherein when the first indication information is configured based on the terminal, after acquiring the target RRC signaling carrying the first indication information, the method further includes:

The terminal applies the configuration associated with all cell groups in the target RRC signaling, and the configuration associated with all cell groups in the subsequently received RRC signaling.
The method according to claim 5, wherein in the case where the first indication information is configured based on the target signaling radio bearer or target logical channel, after acquiring the target RRC signaling carrying the first indication information, The method also includes:

The terminal applies the configuration associated with all cell groups in the target RRC signaling, and the configuration associated with all cell groups in the RRC signaling subsequently received through the target signaling radio bearer or the target logical channel.
The method of claim 1, wherein the first cell group is MCG or SCG.
The method according to claim 8, wherein before acquiring the target RRC signaling, the method further includes:

When the first cell group is MCG, the terminal discards the acquisition of the NAS message;

or,

When the first cell group is SCG, the terminal applies the obtained NAS message.
A cell switching device, including:

An execution module, configured to execute layer 1 or layer 2 handover of the first cell group;

A configuration module configured to obtain target RRC signaling carrying first indication information; wherein the first indication information is used to indicate application of the configuration associated with the first cell group in the target RRC signaling, and subsequent Configuration associated with the first cell group in the received RRC signaling.
A cell switching method includes:

The network side device initiates a Layer 1 or Layer 2 handover of the first cell group to the terminal;

The network side device sends target RRC signaling to the terminal after determining that the layer 1 or layer 2 handover of the first cell group is completed; wherein the target RRC signaling carries first indication information, and the third An indication information is used to instruct the terminal to apply the configuration associated with the first cell group in the target RRC signaling, and the configuration associated with the first cell group in the subsequently sent RRC signaling.
The method according to claim 11, wherein the first indication information is configured based on at least one of the following:

the terminal;

Target signaling radio bearer;

Target logical channel.
The method according to claim 12, wherein when the first indication information is configured based on the terminal, the target RRC signaling is to determine the layer 1 or layer 2 handover of the first cell group. The first RRC signaling sent to the terminal after execution is completed.
The method according to claim 12, wherein when the first indication information is configured based on the target signaling radio bearer or target logical channel, the target RRC signaling is determined when the first cell The first RRC signaling sent to the terminal through the target signaling radio bearer or target logical channel after the group's Layer 1 or Layer 2 handover is completed.
The method according to claim 11, wherein after initiating a layer 1 or layer 2 handover of the first cell group to the terminal, the method further includes:

The network side device receives an RRC reconfiguration complete message from the terminal.
The method according to claim 15, wherein the RRC reconfiguration complete message carries second indication information, and the second indication information is used to indicate at least one of the following:

Part of the configuration in the RRC signaling has not been applied;

Part of the configuration in the RRC signaling is applied;

The configuration associated with the first cell group in the RRC signaling has not been applied;

The configuration associated with other cell groups except the first cell group in the RRC signaling is applied;

Reason information for not being applied.
The method of claim 11, wherein the first cell group is MCG or SCG.
A cell switching device, including:

The first transmission module is used to initiate layer 1 or layer 2 handover of the first cell group to the terminal;

The second transmission module is configured to send target RRC signaling to the terminal after determining that the layer 1 or layer 2 handover of the first cell group is completed; wherein the target RRC signaling carries first indication information, so The first indication information is used to instruct the terminal to apply the configuration associated with the first cell group in the target RRC signaling, and the configuration associated with the first cell group in the subsequently sent RRC signaling.
A terminal, including a processor and a memory, the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the implementation of any one of claims 1 to 9 is achieved. The steps of the cell handover method described above.
A network-side device, including a processor and a memory. The memory stores programs or instructions that can be run on the processor. When the program or instructions are executed by the processor, any one of claims 11 to 17 is implemented. The steps of the cell handover method described in the item.
A readable storage medium, which stores programs or instructions. When the program or instructions are executed by a processor, the cell switching method as described in any one of claims 1 to 9 is implemented, or the cell switching method as claimed in claim 1 is implemented. The steps of the cell switching method according to any one of claims 11 to 17.