WO2012116536A1

WO2012116536A1 - Method and device for continuously receiving multimedia broadcast multicast service

Info

Publication number: WO2012116536A1
Application number: PCT/CN2011/077573
Authority: WO
Inventors: 杜晓; 苟伟; 许辉; 马子江; 王斌
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-02-28
Filing date: 2011-07-25
Publication date: 2012-09-07
Also published as: CN102651852A

Abstract

Disclosed is a method for continuously receiving a multimedia broadcast multicast service (MBMS) service. A user equipment (UE), upon detecting that an MBMS service being received is stopped, according to the correlation between the MBMS service and a unicast service, initiates access of the unicast service corresponding to the MBMS service, and continues to receive the MBMS service through unicast. Further disclosed is a device for continuously receiving an MBMS service. By using the solutions of the present invention, it is ensured that the receiving state of a user receiving an MBMS service will not be interrupted, thereby improving the service experience of the user.

Description

Method and device for continuously receiving multimedia broadcast multicast service

The present invention relates to multimedia communication technologies, and in particular, to a method and apparatus for continuously receiving multimedia broadcast multicast services. Background technique

With the rapid development of the Internet and the popularity of large-screen multi-function mobile terminals, a large number of mobile data multimedia services and various high-bandwidth multimedia services, such as video conferencing, television broadcasting, video on demand, advertising, online education, interactive games, etc., have emerged. This aspect meets the needs of mobile users for multiple services, and also brings new business growth points for mobile operators. These mobile data multimedia services require multiple users to receive the same data at the same time. Compared with general data services, they have the characteristics of large data volume, long duration, and delay sensitivity.

In order to effectively utilize mobile network resources, the 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) proposes Multimedia Broadcast Multicast Service (MBMS), which is a data source to multiple The technology for transmitting data by the target mobile terminal realizes the sharing of resources of the network (including the core network and the access network), and improves the utilization of network resources (especially air interface resources). The MBMS service defined by 3GPP can not only realize plain text low-rate message class multicast and broadcast, but also realize high-speed multimedia service broadcast and multicast, and provide a variety of rich video, audio and multimedia services, which undoubtedly conforms to the future. The trend of mobile data development provides a better business prospect for the development of 3G.

Currently, MBMS technology has been introduced in Release 9 (R9, Release 9) LTE systems and has been enhanced in Release 10 (R10, ReleaselO). In the MBMS technology originally introduced, the control signaling of the MBMS service is transmitted separately from the user data, which is called the control plane (CP, respectively). Control Plane) and User Plane (UP, User Plane). The control plane controls the transmission of user plane data by controlling the start, update, and end of the service, and implements basic MBMS service transmission. The MBMS service is sent in the MBMS Single Frequency Network (MBSFN) area of a fixed size (which can be initially configured by the operator but cannot be dynamically changed). In the R10 version, in order to improve the resource utilization of the MBMS system and facilitate operator management, an MBMS Counting mechanism is introduced. The specific implementation of this mechanism is as follows:

1. Multi-cell/multicast Coordination Entity (MCE) decides to initiate the MBMS service Counting process. The decision can be triggered according to the rules defined by the MCE, or by the operator through OAM (Operation Administration and Maintenance).

2. The MCE sends an MBMS Service Counting Request message to the evolved NodeB (eNB, evolved NodeB) through the M2 interface. Wherein, the message is a class 1 message, and the class 1 message is a message ₀ with feedback

3. After receiving the MBMS Service Counting Request message, the eNB sends an MBMS Service Counting Request message on the MBMS Control Channel (MCCH, MBMS Control Channel) of the corresponding MBSFN area.

After receiving the MBMS Service Counting Request message from the eNB, the user equipment (UE, User Equipment) detects whether the temporary mobile group identity (TMGI, Temporary Mobile Group Identity) of the MBMS service that it is receiving is included, if it contains The TMGI of the MBMS service that is being received by itself is fed back to the eNB with its corresponding index number (index ) according to the order in which the TMGI appears in the MBMS Service Counting Request message.

5. The eNB collects the feedback result of all the UEs in the cell, and after the MBMS Counting process on the MCCH ends (generally, one MCCH modification period), the result is sent to the MCE through the MBMS Service Counting Results Report message on the M2 interface. . 6. The MCE decides whether to activate/deactivate the service according to the result of counting the MBMS service, that is, the number of UEs that are receiving the service or/and interested in the service.

The UE receiving the MBMS service may be in one of two states, one is a RRC (Radio Resources Control) connection state (referred to as a connected state), and the other is an RRC idle state (referred to as an idle state). According to whether the UE is receiving the unicast service, it can be determined whether the UE that is receiving the MBMS service is in the connected state or in the idle state. When the UE is receiving the unicast service, the UE is in the connected state. The UE in the idle state does not establish an RRC connection with the network side, and the UE in the connected state establishes an RRC connection with the network side.

However, the current Counting mechanism only counts the receiving state of the MBMS service in the RRC connected state, and does not consider the receiving state of most UEs in the RRC idle state, which may cause some misjudgment problems. For example, when a certain UE is in an idle state at a certain moment and is receiving or interested in receiving an MBMS service, but since only the connected UE is counted, the result of the statistics is that the service is not activated or deactivated. In this case, the reception of a large number of UEs in the idle state that are receiving or interested in the MBMS service will be interrupted and the MBMS service cannot be continued to be received. In addition, even if only a small number of UEs cause service interruption due to inactivity or deactivation of the service, it will be unable to continue to receive services, thereby greatly reducing the user experience, which is undesired by operators.

In addition, the RMS version of the MBMS technology uses the semi-static MBSFN mode to transmit the MBMS service. The size of the transmission area is unchanged after the initial configuration of the carrier. The UE can only receive the MBMS service in the fixed MBSFN area. When the UE leaves the MBSFN area due to mobility or other reasons, it will not be able to continue receiving services, thereby causing service interruption. In addition, the MBMS service may also be preempted by the higher priority service to transmit the resource, thereby stopping the service transmission; or the UE leaving the effective area of the MBMS service will also stop the MBMS service from being sent. All of the above will cause the UE to continue to receive MBMS services, thereby reducing the user experience. Summary of the invention

In view of this, the main object of the present invention is to provide a method and apparatus for continuously receiving a multimedia broadcast multicast service, which ensures that the receiving state of a user who is receiving an MBMS service is not interrupted, and improves the user's service experience.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

The invention provides a method for continuous reception of an MBMS service, the method comprising:

After detecting that the MBMS service being received is stopped, the UE initiates the access of the unicast service corresponding to the MBMS service according to the correspondence between the MBMS service and the unicast service, and continues to receive the unicast by using the unicast service. MBMS business.

In the above solution, the detecting that the MBMS service being received is stopped is: the UE does not detect the configuration information of the MBMS service being received in the corresponding MCCH;

Alternatively, the UE cannot read the resource location and channel information of the MCCH corresponding to the MBMS service being received on the broadcast control channel (BCCH, Broadcast Control Channel); or the UE cannot find the control information of the MBSFN. The service identifier (Service ID) of the MBMS service being received, or the session ID (Session ID), or the TMGI of the service; or the RRC signaling, layer 1 signaling, or media access (MAC, sent by the UE according to the network; Media Access Control layer signaling, knowing that the MBMS service being received stops transmitting.

In the above solution, the unicast service corresponding to the MBMS service is initiated according to the corresponding relationship between the MBMS service and the unicast service, and the following is: reading the MBMS user service description (USD, User Service Description) Obtaining the access information of the corresponding unicast of the MBMS service, and sending a scheduling and access request to the network according to the obtained access information of the corresponding unicast of the MBMS service, requesting access to the MBMS service content The same unicast business.

In the foregoing solution, after the UE detects that the MBMS service being received is stopped, the method further includes: the UE determining to continue receiving the stopped MBMS service by using the unicast. In the above solution, the UE determines to continue to receive the stopped MBMS service by using the unicast: the UE sends a request to the application layer to continue receiving the stopped MBMS service by using the unicast, and determines, by the application layer, that the handover to the unicast continues to receive the MBMS business;

Or, the UE determines, according to the policy decision set by itself, that the handover to the unicast continues to receive the MBMS service;

Or, the UE determines, when receiving the message that the user continues to receive the service by using the unicast, to switch to the unicast to continue receiving the MBMS service;

Or, when the UE determines that the stopped MBMS service is not normally ended, it is determined that the handover to the unicast continues to receive the MBMS service.

In the above solution, the method further includes: after receiving the instruction that the MBMS service sent by the network is switched to the unicast, the UE starts to initiate the access of the unicast service corresponding to the MBMS service in advance.

The present invention provides a device for continuously receiving a multimedia broadcast multicast service, the device comprising: a detecting module, an access module, and a unicast receiving module;

a detecting module, configured to notify the access module after detecting that the MBMS service being received is stopped;

An access module, configured to initiate, according to the correspondence between the MBMS service and the unicast service, the unicast service that has a corresponding relationship with the MBMS service;

The unicast receiving module is configured to continue to receive the MBMS service by using the unicast after the access module accesses the unicast service.

In the foregoing solution, the detecting module is specifically configured to detect, in the corresponding MCCH, configuration information of the MBMS service that is being received, to learn that the MBMS service that is being received is stopped, or that the receiving of the MBMS service is not received on the BCCH. The resource location and channel information of the MCCH corresponding to the MBMS service, and it is learned that the MBMS service being received is stopped;

Or, the MBMS service is not found in the MBSFN control information. Service ID, or Session ID, TMGI of the post-service, knowing that the MBMS service being received is stopped;

Or, according to the RRC signaling, layer 1 signaling, or MAC layer signaling sent by the network, it is learned that the MBMS service being received stops transmitting.

In the above solution, the device further includes: a switching instruction module, configured to notify the access module after receiving the instruction that the MBMS service sent by the network is switched to the unicast.

In the above solution, the access module is specifically configured to read the MBMS USD, obtain the access information of the corresponding unicast of the MBMS service, and access the network according to the obtained unicast access information of the MBMS service. Sending a scheduling and access request, requesting access to the same unicast service as the MBMS service content, and notifying the unicast receiving module after the access and scheduling request is successful.

The present invention provides a method and apparatus for continuously receiving a multimedia broadcast multicast service. After detecting that the MBMS service being received is stopped, the UE initiates the MBMS service according to the correspondence between the MBMS service and the unicast service. The access of the unicast service with the corresponding relationship continues to receive the MBMS service through unicast; in this way, it can ensure that the receiving state of the user who is receiving the MBMS service is not interrupted, and the user's service experience is improved. DRAWINGS

1 is a schematic flow chart of a method for implementing continuous reception of a multimedia broadcast multicast service according to the present invention;

2 is a schematic structural diagram of an apparatus for implementing continuous reception of a multimedia broadcast multicast service according to the present invention;

FIG. 3 is a schematic flowchart of a method for continuously receiving a multimedia broadcast multicast service according to an embodiment of the present invention; FIG.

FIG. 4 is a schematic flowchart diagram of a method for implementing continuous reception of a multimedia broadcast multicast service according to Embodiment 2 of the present invention. detailed description

The basic idea of the present invention is: after detecting that the MBMS service being received is stopped, the UE initiates access of the unicast service corresponding to the MBMS service according to the correspondence between the MBMS service and the unicast service, The MBMS service continues to be received through unicast.

The invention will be further described in detail below with reference to the drawings and specific embodiments.

The present invention implements a method for continuously receiving multimedia broadcast multicast services. As shown in FIG. 1, the method includes the following steps:

Step 101: The UE detects that the MBMS service being received is stopped.

In this step, the MBMS service is stopped. After the network performs statistics on the service, it is found that the UE that is receiving the service or the number of UEs interested in the service is small, and the network deactivates or does not activate the service, resulting in The MBMS service is stopped from being sent by the MBSFN mode; or because the UE moves out of the MBSFN area where the MBMS service is being received or the effective transmission area of the MBMS service, the UE cannot continue to receive the service, and the service passively stops transmitting; or The service is preempted by other higher-priority services, causing the service to stop, etc.; of course, for other network side to stop the MBMS service being sent or other non-UE reasons, the UE cannot continue to receive the MBMS through MBSFN. The case of the service may also be included in the range in which the MBMS service being received in this step is stopped;

The UE can detect that the MBMS service being received is stopped in the following manner: 1. The UE does not detect the configuration information of the MBMS service being received in the corresponding MCCH, and the corresponding MCCH refers to the configuration of the MBMS service that the UE is receiving. The information is transmitted on the MCCH; or the UE cannot read the resource location and channel information of the MCCH corresponding to the MBMS service being received on the BCCH, and the channel information may be one or more of the following information: MCCH corresponding Scheduling information, MCCH modification period, repetition period, frequency offset and subframe configuration, modulation and coding scheme (MCS, Modulation and Coding Scheme) corresponding to subframe configuration, subframe position of MCCH change notification, physical downlink control channel bit Mapping between (PDCCH bit, Physical Downlink Control Channel bit) and MCCH

The Service ID, or Session ID of the MBMS service being received, or the TMGI of the service, etc., cannot be found in the related control information of the MBSFN.

2. The UE sends RRC signaling, layer 1 (L1, Layer 1) signaling or MAC layer signaling according to the network, and learns that the MBMS service being received stops transmitting.

The step further includes: after receiving the instruction that the MBMS service sent by the network is switched to the unicast, the UE starts to initiate the access of the unicast service corresponding to the MBMS service, that is, directly performing step 104, thereby reducing the service. Interrupt delay

The access of the unicast service that is associated with the MBMS service is initiated in advance, and the UE may not wait until it detects that the MBMS service is stopped after receiving the instruction to switch the MBMS service sent by the network to the unicast. The process of accessing the unicast service corresponding to the MBMS service is initiated.

Step 102: The UE initiates a determination whether to continue receiving the stopped MBMS service by unicast. If the determination result is yes, step 104 is performed; otherwise, step 103 is performed;

Specifically, the UE may send a request to the application layer to continue receiving the stopped MBMS service by using the unicast, and the application layer determines whether to switch to the unicast to continue receiving the service according to the setting of the unicast. If the determination result is yes, step 104 is performed; otherwise, , performing step 103;

The UE may also determine whether to switch to unicast to continue receiving the service according to its pre-set policy. If the determination result is yes, go to step 104; otherwise, go to step 103;

The UE may also report the user to the user, and the user decides whether to continue to receive the service through unicast. When receiving the message that the user decides to continue receiving the service through unicast, step 104 is performed; otherwise, step 103 is performed;

Or, the UE determines whether the stopped MBMS service is a normal end, if not normally, step 104 is performed; otherwise, step 103 is performed; The normal termination of the stopped MBMS service means that the current session of the MBMS service has been completely transmitted, and the network stops the transmission by performing an MBMS session end process;

The determining whether the stopped MBMS service ends normally may be determined by whether to receive the end identifier of the MBMS service; or by using the RRC signaling sent by the network, such as the MBMS Session sto procedure; or by the application layer and the user.

The unicast continuation of the unicast service is performed by the unicast peer-to-peer method, and the unicast service is the same as the MBMS service. The correspondence between the unicast service and the MBMS service being received can be obtained by querying MBMS USD;

In fact, MBMS USD contains all the information that the UE accesses the service through unicast and MBSFN, such as Unicast Resource Identifier (URI), MBGI TMGI and IP multicast address, etc., which is convenient. Know the mapping relationship between unicast services and corresponding MBMS services.

In this embodiment, this step is optional, that is, the step may not be performed in an actual application, and correspondingly, in the case where the step is not performed, the step 103 is not performed, and the step 104 is directly executed.

Step 103: The UE stops receiving the MBMS service, releases related resources, and the process ends. Specifically, the UE ends the receiving of the MBMS service, and releases the related resources occupied by the MBMS service, and the process ends.

Step 104: The UE acquires a correspondence between the MBMS service and the unicast service, and prepares to access the unicast service.

Specifically, the UE reads the MBMS USD, obtains the corresponding unicast access information of the MBMS service, and prepares to access the unicast service;

The corresponding unicast access information refers to related information required for unicast service access in the MBMS USD, which is the same as the MBMS service content, such as unicast access URI, service or session ID, and the like. Information required for access; In fact, as long as the UE starts to receive the MBMS service, it has MBMS USD, which contains all the information needed to access the multicast and unicast services, so as to obtain the corresponding unicast access URI and the corresponding session description protocol (SDP, a link of the Session Description Protocol and other corresponding unicast access information; the UE can learn related information for accessing the same unicast service as the MBMS service content, thereby accessing the unicast service .

Step 105: The UE sends a scheduling and access request according to the correspondence between the MBMS service and the unicast service, and requests the network to send the MBMS service by using unicast.

Specifically, the UE sends a scheduling and access request to the network according to the obtained unicast access information of the MBMS service, and requests to access the same unicast service as the MBMS service content;

Here, the UE may apply for an uplink resource through a scheduling request (SR, Schedule Request), and send a scheduling and access request through a Buffer State Report (BSR), or may be performed by other methods, such as a physical uplink control channel (PUCCH, Physical). The Uplink Control Channel) sends a scheduling and access request, requesting the network to send traffic through unicast.

Step 106: Determine whether the scheduling and access request is successful, if successful, perform step 107; otherwise, perform step 108;

In this step, the determining whether the scheduling and the access request are successful may be determined by using the feedback of the scheduling and the access request, or by monitoring whether the PDCCH has the downlink resource allocated for the UE, or by using the PDCCH or/and the MAC. Indicated by, or RRC signaling;

In this step, a scheduling and access request timer may be set. After the scheduling and the access request are successfully determined, the timer is reset. When the timer expires, the scheduling and access request are considered to be unsuccessful, thus avoiding the UE. Multiple scheduling and access requests.

Step 107: The UE receives the related scheduling and access information of the unicast service corresponding to the MBMS service, accesses the unicast service, and implements continuous reception of the MBMS service, and the process ends.

Specifically, after the access and scheduling request is successful, the UE receives the corresponding corresponding to the MBMS service. The related scheduling and access information of the unicast service, according to the indication of the related scheduling and access information, receive the unicast service on the corresponding downlink resource, and continue to receive the MBMS corresponding service through unicast, thereby implementing the MBMS service. The continuous reception, the process ends; the related scheduling and access information refers to the time-frequency resources, configuration information, and other UE access unicast services allocated by the network for the unicast service corresponding to the MBMS service. Required information, such as session id, service id, etc.

Step 108: The UE interrupts the access to the unicast service, ends the MBMS service reception, and the process ends. Specifically, the UE interrupts access to the unicast service, releases all related resources, and ends the MBMS service reception; all related resources refer to resources related to the UE receiving the MBMS service and resources related to the unicast service corresponding to the UE receiving the MBMS service.

The step further includes: the UE sends a service scheduling and an access failure indication to the application layer or the user, indicating that the application layer or the user service access fails; or the UE sends a failure reason or a subsequent operation indication to the application layer or the user, for example, “interval time” After trying again, wait.

In order to implement the above method, the present invention further provides a device for continuously receiving a multimedia broadcast multicast service. As shown in FIG. 2, the device includes: a detecting module 21, an access module 22, and a unicast receiving module 23;

The detecting module 21 is configured to notify the access module 22 after detecting that the MBMS service being received is stopped;

The access module 22 is configured to initiate, according to the correspondence between the MBMS service and the unicast service, access of a unicast service corresponding to the MBMS service;

The unicast receiving module 23 is configured to: after the access module 22 accesses the unicast service, continue to receive the MBMS service by using unicast;

The detecting module 21 is specifically configured to detect, in the corresponding MCCH, configuration information of the MBMS service that is being received, and learn that the MBMS service that is being received is stopped; or, the MBMS service corresponding to the MBMS service that is being received cannot be read on the BCCH. MCCH resource location and letter The information of the MBMS service that is being received is stopped; or the MBMS service that is being received is stopped by other means in the prior art, for example, the service ID of the MBMS service being received cannot be found in the related control information of the MBSFN. Or the session ID, or the TMGI of the service, etc., knowing that the MBMS service being received is stopped; or, according to the network sending RRC signaling, layer 1 signaling or MAC layer signaling, knowing that the MBMS service being received stops transmitting; The method further includes: a switching instruction module 24, configured to notify the access module 22 after receiving an instruction to switch the MBMS service sent by the network to unicast;

The access module 22 is specifically configured to: after receiving the notification of the detecting module 21, determine to continue to receive the stopped MBMS service by using the unicast, and initiate and perform according to the correspondence between the MBMS service and the unicast service. The MBMS service has a corresponding unicast service access;

The access module 21 is configured to read the MBMS USD, obtain the access information of the corresponding unicast of the MBMS service, and send the scheduling and the network according to the obtained unicast access information of the MBMS service. The access request, requesting access to the same unicast service as the MBMS service content, and after the access and scheduling request is successful, notifying the unicast receiving module 23;

The access module 22 is further configured to: after the access and scheduling request fails, interrupt the access to the unicast service, release all related resources, and end the MBMS service reception; all related resources refer to resources related to the UE receiving the MBMS service and And receiving, by the UE, resources related to the unicast service corresponding to the MBMS service;

The device further includes a reporting module 25, configured to send a service scheduling and access failure indication to the application layer or the user, prompting the application layer or the user service access to fail; or sending the failure reason or subsequent operation indication to the application layer or the user, such as " Try again after a period of time, etc.

The access module 22 is further configured to notify the reporting module 25 after the access and scheduling request fails. Embodiment 1 This embodiment is a method for implementing continuous reception of an MBMS service after the MBMS service that is being sent is stopped. As shown in FIG. 3, the method includes:

Step 201: The UE detects that the MBMS service being received is stopped.

Here, the UE refers to a UE that is capable of receiving an MBMS service. For the specific process of this step, refer to step 101.

Step 202: The UE determines whether the stopped MBMS service is a normal end, if it is normal, step 204 is performed; otherwise, step 203 is performed;

Step 203: End the reception of the MBMS service, and the process ends.

Step 204: The UE reads MBMS USD, and obtains access information of the corresponding unicast service of the MBMS service.

Step 205: The UE sends a scheduling and access request to the network according to the obtained access information of the corresponding unicast service of the MBMS service, and requests the network to send the MBMS service by using unicast. In this step, the corresponding unicast The access information of the service refers to the related information required for the unicast service access of the MBMS service, such as the access URI, SDP, etc. of the MBMS service corresponding to the unicast service;

The step of the access and the access request carrying the corresponding unicast service of the MBMS service further includes: the network preparing the unicast service for the UE according to the resource scheduling and the access policy, and allocating the time-frequency resource and the configuration information, The UE is notified of the allocated time-frequency resources and configuration information.

Step 206: Determine whether the scheduling and access request is successful, if successful, perform step 208; otherwise, perform step 207;

In this step, the determining whether the scheduling and the unicast access request are successful may be based on one or more of downlink information sent by the network, such as scheduling and access request response, PDCCH indication, MAC signaling, or RRC signaling. to make sure;

This step can also set a scheduling and access request timer, in the scheduling and access request After the success is successful, the timer is reset. When the timer expires, the scheduling and access request are considered to be unsuccessful, thus avoiding multiple scheduling and access requests of the UE.

Step 207: The UE interrupts the access to the unicast service, and ends the MBMS service, and the process ends. Step 208: The UE receives the related scheduling and access information of the unicast service corresponding to the MBMS service, and accesses the unicast service. Continuous reception of the MBMS service by unicast.

Further, the method further includes: after the UE accesses the unicast service, releasing the original MBMS service receiving state, and the service-related context information, and receiving the service only through unicast; or saving the original MBMS service. Information, such as MBMS USD, TMGI or multicast IP address, etc., is convenient for the network to deactivate the service activation or/and the UE that moves out of the MBSFN area to enter the MBSFN area again after switching to the MBSFN reception mode.

It can be seen that, in the case that the MBMS service that is being sent is stopped, the UE determines that the MBMS service is abnormally terminated, and then reads the corresponding information of the MBMS service corresponding to the unicast service in the MBMS USD, and accesses the information. The unicast enables the continuous reception of the MBMS service, so that after the MBMS service is deactivated or the UE moves out of the MBSFN area, the user who is receiving the MBMS service can continuously receive the MBMS service, thereby improving the continuity of the MBMS service reception. Increased user satisfaction.

Embodiment 2

In this embodiment, after the MBMS service that is being received is stopped, the application layer or the user participates in deciding whether to continue receiving the MBMS service through unicast, thereby implementing a method for continuously receiving the MBMS service. As shown in FIG. 4, the method includes The following steps:

Step 301: The UE detects that the MBMS service being received is stopped.

Step 302: The UE sends a service interruption indication to the application layer or the user, and the service interruption indication indicates whether the service is continuously received through the unicast.

In this step, the service interruption indication may be a special indicator or bit sent to the application layer, or a predefined indicator bit, and the user may Received an inquiry similar to "Whether to continue receiving services through unicast", indicating whether the user continues to receive services through unicast;

Further, the step may be directly processed according to an application layer or a preset policy of the user, for example, the preset policy is “continue to receive without receiving unicast after the MBMS service is interrupted”, or “when receiving. After the MBMS service is abnormally interrupted, it continues to receive by unicast; etc. Of course, there are other similar preset policies, depending on the user's settings.

Step 303: Determine whether the application layer or the user indicates to continue receiving services through unicast. If the determination result is yes, go to step 305; otherwise, go to step 304;

Specifically, according to an instruction from the application layer or the user, it may be determined whether the unicast continues to receive the service through unicast.

Step 304: The UE ends the MBMS service reception, and the process ends.

Specifically, when the indication from the application layer or the user is "continue to receive the service without unicast"; or the policy preset by the application layer or the user is "the MBMS service is interrupted, the service is not continued to be received through unicast"; or the like The UE releases the resources and service contexts occupied by the MBMS service, and ends the MBMS service reception, and the process ends.

Step 305: The UE reads MBMS USD, and obtains access information of the corresponding unicast service of the MBMS service.

Specifically, when the indication of the application layer or the user is "continue to receive the service through unicast"; or the policy preset by the application layer or the user is "continue to receive the service through unicast after the MBMS service is interrupted"; or other similar "passing" When the unicast continues to receive the service policy, the UE reads the USD of the MBMS service, obtains the access URI of the unicast service corresponding to the MBMS service, and other required information, such as the SDP related to the unicast service. Links, etc.

Step 306: The UE sends a scheduling and access request, and requests the network to send the service by using unicast. Specifically, the UE sends the scheduling request and the unicast access request to the network by using the access information of the corresponding unicast service of the MBMS service obtained from the MBMS, and requests to access the unicast service corresponding to the MBMS service.

Step 307: Determine whether the scheduling and access request is successful, if the scheduling and access request is successful, go to step 308; otherwise, go to step 309;

Specifically, whether the scheduling and access request is successful may be determined according to one or more of downlink information sent by the network, such as scheduling and access request response, PDCCH indication, MAC signaling, or RRC signaling.

Step 308: The UE receives the related scheduling and access information of the unicast service corresponding to the MBMS service, accesses the unicast service, and implements continuous reception of the MBMS service by using unicast, and the process ends;

Step 309: The UE interrupts the access to the unicast service, and informs the user that the unicast access fails, ends the MBMS service reception, and the process ends.

Specifically, after receiving the indication that the scheduling and the access request of the network is unsuccessful, the UE interrupts the unicast resource scheduling and the access request, releases the resources related thereto, and ends the receiving of the MBMS service;

The indication that the scheduling and access request of the network is unsuccessful may be from a scheduling and access request response, or the network may notify the UE by using dedicated signaling or other signaling; or may also set a timer to determine in the scheduling and access request. After successful, the timer is reset, and when the timer expires, the scheduling and access request are considered to have failed.

In this embodiment, after performing step 308, the UE may also release the receiving state of the MBMS service, and the context information related to the MBMS service, and receive the service only by using unicast; and may also save the information of the MBMS service. Such as MBMS USD, TMGI or multicast IP address, etc., it is convenient to switch to MBSFN receiving mode later.

It can be seen that the embodiment is directed to the case that the MBMS service that the user is receiving is stopped. In the manner of user participation, the MBMS service is continuously received through unicast, thereby ensuring the continuity of the MBMS service reception and improving the experience of the user receiving the service.

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

Claims

Claim

A method for continuously receiving a multimedia broadcast multicast (MBMS) service, the method comprising:

After detecting that the MBMS service being received is stopped, the user equipment (UE) initiates the access of the unicast service corresponding to the MBMS service according to the correspondence between the MBMS service and the unicast service, and unicasts Continue to receive the MBMS service.

2. The method according to claim 1, wherein the detecting that the MBMS service being received is stopped is: the UE does not detect the MBMS service being received in the corresponding MBMS Control Channel (MCCH). Configuration information;

Or the UE cannot read the resource location and channel information of the MCCH corresponding to the MBMS service being received on the broadcast control channel (BCCH);

Alternatively, the UE cannot find the service identifier (Service ID) or the session identifier (Session ID) of the MBMS service being received, or the temporary mobile group identifier of the service (TMGI) in the control information of the MBMS single frequency network (MBSFN). );

Alternatively, the UE learns that the MBMS service being received stops transmitting according to the RRC signaling, the layer 1 signaling, or the medium access (MAC) layer signaling sent by the network.

The method according to claim 1, wherein the unicast service corresponding to the MBMS service is initiated according to the correspondence between the MBMS service and the unicast service, as follows: Obtaining an MBMS user service description (USD), acquiring the corresponding unicast access information of the MBMS service, and sending a scheduling and access request to the network according to the obtained access information of the corresponding unicast of the MBMS service, requesting to connect Enter the same unicast service as the MBMS service content.

The method according to claim 1, wherein after the UE detects that the MBMS service being received is stopped, the method further comprises: the UE determining to continue receiving the stopped MBMS service by using unicast.

The method according to claim 4, wherein the UE determines to continue receiving the stopped MBMS service by using the unicast: the UE sends a request to the application layer to continue receiving the stopped MBMS service by using the unicast, The application layer determines to switch to unicast to continue receiving the MBMS service;

The method according to claim 1, wherein the method further comprises: after receiving the instruction that the MBMS service sent by the network is switched to the unicast, the UE starts to initiate the unicast corresponding to the MBMS service in advance. Access to business.

A device for continuously receiving a multimedia broadcast multicast service, the device comprising: a detection module, an access module, and a unicast receiving module;

The device according to claim 7, wherein the detecting module is configured to detect, in the corresponding MCCH, configuration information of the MBMS service being received, and learn that the MBMS service being received is stopped;

Or, the MCCH corresponding to the MBMS service being received cannot be read on the BCCH. The resource location and the channel information are learned that the MBMS service being received is stopped; or the service ID of the MBMS service being received is not found in the control information of the MBSFN, or the session ID, the TMGI of the post service, and the MBMS being received. Business is stopped;

The device according to claim 7, wherein the device further comprises: a switching instruction module, configured to notify the access module after receiving an instruction to switch the MBMS service sent by the network to the unicast.

The device according to claim 7, wherein the access module is configured to read the MBMS USD, and obtain the access information of the corresponding unicast of the MBMS service, according to the obtained MBMS service. The corresponding unicast access information is sent to the network for scheduling and access requests, requesting access to the same unicast service as the MBMS service content, and when the access and scheduling request is successful, notifying the unicast receiving module.