CN101883327B

CN101883327B - The method and system of receiving state report by user equipment in multimedia broadcast multicast service

Info

Publication number: CN101883327B
Application number: CN201010212986.0A
Authority: CN
Inventors: 许辉
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Filing date: 2010-06-29
Publication date: 2016-12-14
Anticipated expiration: 2030-06-29

Abstract

The invention discloses UE (subscriber equipment) in a kind of MBMS (multimedia broadcast multi-broadcasting business) and send the method and system of receiving state report, including: within certain cycle or when trigger event occurs, user equipment (UE) actively initiates feedback procedure, or the lateral UE of network sends feedback request instruction, UE sends feedback information according to above-mentioned instruction to network side, and network side receives state according to UE feedback information to UE and adds up.The present invention discloses a kind of UE and send the system of multimedia broadcast multi-broadcasting business MBMS receiving state report.The present invention can make UE send receiving state report under conditions of multiple MCCH, it is achieved the correct statistics to UE quantity, meets network side and activates or the requirement of deexcitation MBSFN transmission.

Description

Method and system for realizing receiving state report of multimedia broadcast multicast service user equipment

Technical Field

The present invention relates to a technology for reporting Service information of a User Equipment (UE) in a Multimedia Broadcast Multicast Service (MBMS) system, and in particular, to a method and a system for sending a reception status report of a UE.

Background

In order to effectively utilize mobile network resources, the third Generation Partnership Project (3 GPP), which is a technology for transmitting data from a data source to a plurality of target mobile terminals, proposes an MBMS service, which enables sharing of network (including core network and access network) resources and improves utilization of network resources, particularly air interface resources.

In a Long Term Evolution (LTE) system, a user equipment (or called terminal) is notified that a certain MBMS service is about to change, where the changes may be session start, service bearer update, or session stop, and a Downlink Control Information (DCI) and an MBMS Radio Network Temporary Identifier (M-RNTI) may be first sent on a Physical Downlink Control Channel (PDCCH). The UE further reads a specific MCCH message according to the related information in the DCI, which is called an MCCH notification (notification) mechanism. Specific service configuration parameters, such as a service ID, Radio Link Control (RLC) of the service, Media Access Control (MAC), physical layer configuration parameters, etc., are to be transmitted on the MCCH channel.

In the LTE system, there are two bearer modes for MBMS: a broadcast mode and an enhanced broadcast mode. Without the multicast mode, the network side cannot know which MBMS services the UE receives and/or is ready to receive. The enhanced broadcast is between broadcast and multicast, and the advantages of simple flow in the broadcast and resource optimization in the multicast are absorbed. When the MBMS enhanced broadcast bearer is used, the registration/deregistration from the UE to the BM-SC can be realized only through the joining/leaving process on the application layer without signaling interaction and information storage on the bearer network layer. Enhanced broadcasting is an optimization and extension to broadcasting, such as in an access network, which does not send data to those cells that do not receive users. For the MBMS service in enhanced mode, the state and Number of UEs receiving the MBMS service need to be considered when configuring a System Frame Number (SFN) and allocating resources, so that UE information for receiving/or preparing to receive the MBMS service needs to be fed back, which is called as uplink feedback of MBMS. In order to activate/deactivate the MBSFN transmission mode in the 3GPP Rel10MBMS, the network side needs to obtain the receiving state information of the UE, for example, the UE number information of a given MBMS service is being received, so a mechanism is needed to trigger the UE to report the information of its receiving state.

In order to enable the network side to obtain the number of users having the MBMS service requirement in each cell, the MBMS system introduces a counting process.

The Counting process refers to a process of Counting the number of users receiving and interested in receiving a certain MBMS service in a cell by a network side when a Session of the MBMS service is started or during the Session (also called Counting) process, so as to determine whether to use an MBSFN transmission mode. When the network side prepares to initiate the counting/recounting process, the identification and access probability of the MBMS service are added into the access information (access info) of the MCCH. The reason for using the access probability is that all users are not required to establish a connection for feedback, as long as the feedback quantity may reach a threshold, otherwise, uplink congestion may be caused when there are many Idle (Idle) state users.

Disclosure of Invention

During the research and practice of the prior art, the inventor finds that the prior art has the following problems: the 3GPP Rel10MBMS needs to activate or deactivate the MBSFN transmission mode, which is based on the UE receiving status report, but the prior art specification does not have a method for implementing the UE sending the receiving status report, i.e. the UE does not know when to send the receiving status information and which feedback information to send.

In order to realize the statistics of the UE receiving state, a method for implementing uplink feedback by the UE needs to be designed.

In view of this, the main objective of the present invention is to provide a method for UE to report a receiving status of a multimedia broadcast multicast service, where the UE reports the receiving status to a network side according to the method, so as to meet a requirement that the network side activates or deactivates an MBSFN transmission mode of an MBMS service.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a method for UE to report the receiving state of multimedia broadcast multicast service includes:

in a certain period or when a trigger event occurs, the user equipment UE actively initiates a feedback process, and the network side counts the UE receiving state according to the UE feedback information.

Or the network side sends a feedback request indication to the UE, the UE sends feedback information to the network side according to the indication, and the network side counts the receiving state of the UE according to the feedback information of the UE and activates or deactivates the MBSFN transmission mode of the MBMS according to the counting result.

The feedback information content sent by the UE comprises one or more of the following: the method comprises the steps of UE state, MBSFN area ID, notification indication indicator, MBMS service ID, UE ID, physical multicast channel PMCH ID, session ID, logical channel identification LCID, service list index, feedback period and trigger event.

The UE state comprises: ready to receive, receiving, stop receiving, receive bearer change, cell update, cell handover.

The period may be selected by the UE itself or set by the network side.

The predetermined event may be selected by the UE or set by the network.

The UE is in a Radio Resource Control (RRC) idle state or in an RRC connected state.

Preferably, the UE uplink feedback information is carried in RRC connection request information, or RRC connection reconfiguration complete information, or RRC connection reestablishment request information, or RRC connection reestablishment complete information, or connection establishment complete information, or cell update information, or random access request information, or measurement report, or media access control particle MAC CE, or dedicated signaling information.

The network side sends a feedback cycle, or triggers an event, or indicates a feedback request through an RRC message or a Media Access Control (MAC) signaling; preferably, the RRC message may be an MCCH message or a system message.

A system for sending a multimedia broadcast multicast service receiving state report by a user comprises a bearing unit, a sending unit, a triggering unit, a receiving unit and a feedback unit; wherein,

a bearer unit, configured to bear a feedback cycle, or a trigger event, or a feedback request indication on an RRC message or an MAC message; the RRC information may be an MCCH message or a system message, and the MAC message may be a MAC control particle CE;

a transmitting unit, configured to transmit an RRC message or an MAC message;

a triggering unit, configured to trigger the UE to send a reception status report;

a receiving unit, configured to receive an RRC message or an MAC message;

and the feedback unit is used for performing uplink feedback on the UE according to the feedback cycle, or the trigger event, or the feedback request indication.

Preferably, the trigger event includes session start, session end, bearer change indication, cell update, and cell handover;

in the invention, the network side indicates the UE to report the receiving state or the UE actively sends the feedback information. The invention can enable the UE to send the receiving state report according to the feedback triggering condition under the condition of a plurality of MCCHs, realizes the statistics of the UE quantity by the network side and meets the requirement of activating or deactivating the MBSFN transmission mode.

Drawings

Fig. 1 is a flowchart of an implementation method of uplink feedback;

FIG. 2 is a flow chart of periodically sending and receiving status reports;

FIG. 3 is a flow chart of event triggered uplink feedback;

FIG. 4 is a flow chart of a third/fourth embodiment of network-side trigger feedback;

FIG. 5 is a diagram illustrating uplink feedback of an RRC IDLE state UE according to the present invention;

fig. 6 is a schematic diagram of the structure of the mbms feedback system according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings by way of examples.

The present invention will be described in detail below with reference to the drawings and examples.

The application scene of the invention is as follows: the cell in which the UE is located belongs to one or more MBSFN areas, each MBSFN area corresponds to one MCCH channel, and the network side needs to decide whether to activate/deactivate MBSFN transmission according to the information of the UE receiving state.

Aiming at the triggering process of the MBMS to the UE receiving state, the period of sending uplink feedback by the network side, or a triggering event, or a feedback request indication, the UE sends feedback information to the network side according to the triggering condition, and the network side counts the UE receiving state information to realize the requirement of activating or deactivating the MBSFN transmission mode.

In summary, the method for sending the receiving status information of the multimedia broadcast multicast service by the UE of the present invention comprises the following steps:

step 1, setting a triggering condition for UE to receive state information feedback;

step 2, the user equipment sends feedback information to the network side according to the triggering condition;

and 3, the network side counts the number of the user equipment according to the feedback information of the user equipment.

The above steps are shown in fig. 1. The network side includes an eNB and a Multimedia Coordination Entity (MCE); the MCE is a logical entity, and the MCE may exist alone or as part of other network elements, such as part of an eNB; the user equipment in the above step refers to a user equipment having an MBMS reception capability. The network side may also be a Relay, or a home base station henb (home enodeb), etc.

The triggering condition in the step 1 includes at least one of the following: periodic triggering, event triggering and network side triggering. The period may be selected by the UE itself, or indicated by RRC message or MAC message on the network side. Preferably, the UE self-selected period may be one or more MCCH modification periods or MCH scheduling periods. Preferably, the period is generally less than the duration of the traffic session. The event may be a session start, or a session end, or a bearer change, or a cell update, or a cell handover. The network side trigger may be that the network side instructs the UE to send feedback through an RRC message or a MAC message, preferably, the RRC message may be an MCCH message or a system message, and the MAC message may be a MAC CE message.

In step 2, the UE may be in an RRC _ IDLE state or an RRC _ CONNECTED state;

the feedback information sent by the user equipment includes, but is not limited to, one or more of the following: the method comprises the steps of UE state, MBSFN area ID, notification indication indicator, MBMS service ID, UE ID, physical multicast channel PMCH ID, session ID, logical channel identification LCID, service list index, feedback period and trigger event.

The UE states include: ready to receive, receiving, stop receiving, cell update, cell switch.

Step 2, if the user equipment is in an RRC IDLE state (hereinafter referred to as an Idle state), the UE firstly initiates a random access process, sends an RRC connection establishment request, and additionally sends feedback information in the RRC connection establishment request information, for example, the RRC connection establishment reason is set to be MBMS reception;

step 2, if the user equipment is in an RRC CONNECTED state (hereinafter referred to as CONNECTED state), the UE adds feedback information in RRC connection reconfiguration completion information, for example, the RRC connection reconfiguration reason is set as MBMS reception;

in step 3, the network side according to the user equipment feedback information refers to the UE quantity information according to the MBMS receiving and/or interested MBMS receiving; if the design of the probability factor is adopted in the feedback process, the network side can obtain the UE quantity information in the MBSFN area according to the UE feedback information and the probability factor.

The user equipment comprises user equipment which is receiving the MBMS and/or is interested in receiving the MBMS;

the UE generally has a small data volume for sending and receiving the state information, so that the state information can be sent in the existing RRC signaling or MAC CE or dedicated signaling information, where the existing RRC signaling includes one or more of the following signaling: RRC connection request information, RRC connection reconfiguration completion information, RRC connection reestablishment request information, RRC connection reestablishment completion information, RRC connection establishment completion information, cell update information, random access request information and a measurement report.

The network side may send the feedback request indication information on the MCCH or system message, which may be a separate RRC message or an information element (IE, info.

The essence of the present invention will be further illustrated by the following specific examples.

Example one

The application scenario of this example is that the UE initiates the feedback process periodically, which is selected by the UE itself.

Fig. 2 is a flowchart of a first embodiment of a method for UE to periodically initiate feedback according to the present invention, and as shown in fig. 2, the method for UE to periodically feedback includes the following steps:

step 101, UE selects a reporting period, and in each reporting period, the UE sends a receiving state report to a network side;

the reporting period may be a period already defined in the specification, and preferably, the period may be: one or more MCCH modification periods, or one or more multicast channel scheduling periods (MSP); different UEs may select the same or different feedback periods; in order to reduce the number of UEs initiating feedback at the same time, in the feedback period, the UE may randomly select a time for sending feedback; preferably, each UE sends feedback information once in each feedback period, and if the network side receives multiple pieces of feedback information of the same UE in one feedback period, the statistics is only performed once.

The feedback period is generally less than the duration of a service session;

the UE may be in an RRC connected state or an RRC idle state;

the network side generally includes an eNB and an MCE.

The UE in the RRC connection state generally sends feedback information through RRC signaling or MAC CE signaling; if the UE is scheduled in a feedback period, the UE sends feedback information, otherwise, the UE requests uplink resources for sending a reception Status Report through a Scheduling Request (SR) or a Buffer Status Report (BSR).

Preferably, the RRC signaling includes one or more of the following: RRC connection request information, RRC connection reconfiguration complete information, RRC connection reestablishment request information, RRC connection reestablishment complete information, RRC connection establishment complete information, cell update information, random access request information, measurement report, dedicated RRC signaling.

The UE in the RRC idle state generally sends feedback information through a random access process, such as receiving state information of the UE carried by RRC connection request information in message 3(Msg 3); fig. 3 shows a feedback diagram of RRC idle ue. To reduce the collision of the random access procedure, a part of a random access Preamble (Preamble) sequence may be reserved to the MBMS UE, or the MBMS UE may be allocated a random access resource different from that of the unicast UE.

The uplink reception status report includes one or more of the following information: the method comprises the steps of UE state, MBSFN area ID, notification indication indicator, MBMS service ID, UE ID, physical multicast channel PMCH ID, session ID, logical channel identification LCID, service list index, feedback period and trigger event. The UE states include: ready to receive, receiving, stop receiving, cell update, cell switch.

102, a network side counts the number of UE according to the UE receiving state report information;

the network side carries out statistics according to the UE receiving state report information in a period of time;

in the period of time, if the network side does not receive the UE feedback information, the network side considers that the UE stops receiving or is not interested in receiving the MBMS service; in the period of time, the network side receives a plurality of feedback information of the same UE, and the network side can count the feedback information once;

the network side counts and counts according to the feedback information and adjusts the MBSFN transmission according to the counting result;

the MBSFN adjustment refers to the activation or deactivation of MBSFN transmission by a network side; the activating MBSFN transmission refers to transmitting the MBMS service in an MBSFN mode in an MBSFN area, and the deactivating MBSFN transmission refers to stopping transmitting the MBMS service in the MBSFN area. The deactivation of MBSFN transmission generally requires notification of the UE in advance, and generally cannot affect the existing service session process.

After the feedback of the RRC Idle state UE is finished, the UE entering the Connected state can be converted back to the Idle state through RRC signaling, other high-level signaling or special signaling;

the embodiment is a periodic feedback process initiated by the UE actively, and as long as the session duration of the service is not less than the feedback period, the process can carry out correct statistics on the receiving state of the UE, and is simple to implement.

Example two

The scenario of this example is that the UE sends uplink feedback when a specific event occurs, as shown in fig. 4, the method for the UE to periodically feed back includes the following steps:

step 201, UE selects an event triggering the report of the receiving state, and when the event occurs, the UE sends the receiving state report to the network side;

the triggering event includes at least one of: session start, session end, bearer change, cell update and cell switch;

the UE may be in an RRC connected state or an RRC idle state;

the network side generally includes an eNB and an MCE.

The UE in the RRC connection state generally sends feedback information through RRC signaling or MAC CE signaling; when the reporting event occurs, if the UE has uplink available resources, the UE sends feedback information, otherwise, the UE requests the uplink resources to send a reception status Report through a Scheduling Request (SR) or a Buffer Status Report (BSR).

The UE in the RRC idle state generally sends feedback information through a random access process, such as receiving state information of the UE carried by RRC connection request information in message 3(Msg 3); to reduce the collision of the random access procedure, a part of a random access Preamble (Preamble) sequence may be reserved to the MBMS UE, or the MBMS UE may be allocated a random access resource different from that of the unicast UE.

Step 202, the network side counts the number of the UE according to the UE receiving status report information;

the network side carries out statistics according to the UE receiving state report information in a period of time; the period of time is generally set by the network side according to the requirement;

in the period of time, the network side receives a plurality of feedback information of the same UE, and the network side can count the feedback information once;

the second embodiment is that the event initiated by the UE triggers the feedback process, which can perform real-time correct statistics on the UE receiving status and is simple to implement.

EXAMPLE III

In the scenario of this example, a network side sends a feedback request indication, and a UE sends feedback information according to the indication, as shown in fig. 5, the method for requesting UE feedback by the network side includes the following steps:

step 301, the network side sends a feedback request indication to the UE through an RRC message or a MAC CE message,

preferably, the RRC message may be an MCCH message or a system message; the RRC message may be a separate RRC message or an IE;

the feedback request indication information generally comprises an MBMS service identification ID or an MBMS conversation identification ID or bitmap information indicating the MBMS conversation; in order to reduce the number of UEs sending feedback simultaneously, the feedback request indication information typically also includes a probability factor.

The UE may be in an RRC connected state or an RRC idle state; the probability factors are generally set to different values for RRC connected UEs and RRC idle UEs, respectively.

The network side generally includes an eNB and an MCE.

Step 302, according to the feedback request indication information, the UE sends a reception status report to the network side;

the UE acquires feedback request indication information by reading the RRC message or the MAC CE message; for the started MBMS service, the UE can directly acquire feedback request indication information; for the MBMS service that is not started, the UE generally needs a corresponding mechanism to monitor the feedback request indication information, such as the MCCH notification information or the paging information.

The UE in the RRC connection state generally sends feedback information through RRC signaling or MAC CE signaling; when receiving the feedback Request indication, if the UE has uplink available resources, the UE sends feedback information, otherwise, the UE requests the uplink resources for sending a reception Status Report through a Scheduling Request (SR) or a Buffer Status Report (BSR).

Step 303, the network side counts the number of the UE according to the UE receiving status report information;

the network side counts the number of the UE according to the feedback information and adjusts the MBSFN transmission according to the counting result;

the third embodiment is a feedback process initiated by the network side, which can perform statistics on the UE receiving state as needed, but is more complex to implement.

Example four

step 401, the network side sends a feedback request indication to the UE through an RRC message or a MAC CE message,

the feedback request indication information generally comprises an MBMS service identification ID or an MBMS conversation identification ID or bitmap information indicating the MBMS conversation, a feedback period or a feedback trigger event; in order to reduce the number of UEs sending feedback simultaneously, the feedback request indication information typically also includes a probability factor.

The network side generally includes an eNB and an MCE.

Step 402, according to the feedback request indication information, the UE sends a receiving state report to the network side;

After the UE sends the feedback information for the first time, the UE generally performs periodic feedback or event-triggered feedback to the network side according to a feedback period or a feedback triggering event.

Step 403, the network side counts the number of the UEs according to the UE receiving status report information;

the network side carries out statistics according to the UE receiving state report information in a period of time; the period of time is generally set by the network side according to the requirement; if a feedback period is set, the period of time is generally not less than the feedback period, and the feedback period is generally less than the service session duration;

the fourth embodiment is a feedback process initiated by a network side, and the difference between the fourth embodiment and the third embodiment is that after the UE sends feedback for the first time, the UE needs to continue to perform feedback according to a feedback period or a feedback trigger event, and the network side can control the feedback process, but the implementation is more complex.

Fig. 6 is a schematic structural diagram of a system for implementing a mbms ue receiving status report according to the present invention, and as shown in fig. 6, the mbms count feedback system according to the present invention includes a carrying unit 60, a sending unit 61, a triggering unit 62, a receiving unit 63, and a feedback unit 64; wherein,

a carrying unit 60, configured to carry a feedback cycle, or a trigger event, or a feedback request indication on an RRC message or an MAC message; wherein the RRC information may be an MCCH message or a system message, and the MAC message may be MAC control particle C E;

a transmitting unit 61, configured to transmit an RRC message or an MAC message;

a triggering unit 62, configured to trigger the UE to send a reception status report;

a receiving unit 63, configured to receive an RRC message or an MAC message;

a feedback unit 64, configured to perform uplink feedback on the UE according to the feedback cycle, or a trigger event, or a feedback request indication.

As shown in fig. 6, the system for implementing mbms user reception status report of the present invention further includes: a configuration unit 65, configured to configure a trigger condition for performing uplink feedback.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

A method for UE (user equipment) to transmit and receive status report in MBMS (multimedia broadcast multicast service) includes: setting a triggering condition fed back by the UE, sending feedback information to a network side by the UE according to the triggering condition, and counting the receiving state of the UE by the network side according to the feedback information of the UE; wherein the feedback information comprises at least one of the following information: the method comprises the steps of UE state, multicast broadcast single frequency network MBSFN area identification ID, notification indication notification indicator, MBMS service ID, UE ID, physical multicast channel PMCH ID, session ID, logical channel identification LCID, service list index, feedback period and trigger event.
2. The method of claim 1, wherein the trigger condition comprises at least one of: and (4) performing periodic feedback, performing event trigger feedback, and sending a feedback request indication by a network side.
3. The method of claim 2, wherein the feedback period is less than a traffic session duration.
4. The method of claim 2, wherein the triggering event comprises: session start, session end, bearer change, cell update, and cell handover.
5. The method of claim 2, wherein the feedback request indication can be carried by Radio Resource Control (RRC) signaling or Medium Access Control (MAC) signaling.
6. The method of claim 1, wherein the UE state comprises: ready to receive, receiving, stop receiving, receive bearer change, cell update, cell handover.
7. The method according to claim 1, wherein the UE uplink feedback information is carried in RRC connection request information, or RRC connection reconfiguration complete information, or RRC connection reestablishment request information, or RRC connection reestablishment complete information, or connection establishment complete information, or cell update information, or random access request information, or measurement report, or media access control particle MAC CE, or dedicated signaling information.
8. A system for realizing multimedia broadcast multicast service MBMS user receiving status report is characterized in that the system comprises a system for sending the multimedia broadcast multicast service receiving status report by a user, which comprises a triggering unit, a bearing unit, a sending unit, a receiving unit and a feedback unit; wherein,

a triggering unit, configured to trigger the UE to send a reception status report;

a bearer unit, configured to bear a feedback cycle, or a trigger event, or a feedback request indication on an RRC message or an MAC message; the RRC information may be an MCCH message or a system message, and the MAC message may be a MAC control particle CE;

a transmitting unit, configured to transmit an RRC message or an MAC message;

a receiving unit, configured to receive an RRC message or an MAC message;

a feedback unit, configured to perform uplink feedback on the UE according to the feedback cycle, or a trigger event, or a feedback request indication;

wherein the feedback information comprises at least one of the following information: the method comprises the steps of UE state, multicast broadcast single frequency network MBSFN area identification ID, notification indication notification indicator, MBMS service ID, UE ID, physical multicast channel PMCH ID, session ID, logical channel identification LCID, service list index, feedback period and trigger event.