WO2012130007A1 - Procédé et dispositif pour le traitement d'un service de diffusion/multidiffusion multimédia (mbms) - Google Patents

Procédé et dispositif pour le traitement d'un service de diffusion/multidiffusion multimédia (mbms) Download PDF

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Publication number
WO2012130007A1
WO2012130007A1 PCT/CN2012/071617 CN2012071617W WO2012130007A1 WO 2012130007 A1 WO2012130007 A1 WO 2012130007A1 CN 2012071617 W CN2012071617 W CN 2012071617W WO 2012130007 A1 WO2012130007 A1 WO 2012130007A1
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WO
WIPO (PCT)
Prior art keywords
mbms service
mbms
mce
service
transmission
Prior art date
Application number
PCT/CN2012/071617
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English (en)
Chinese (zh)
Inventor
苟伟
马子江
郭森宝
陈东丽
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2012130007A1 publication Critical patent/WO2012130007A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
    • H04L51/58—Message adaptation for wireless communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/611—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present invention relates to the field of communications, and in particular, to a Multimedia Broadcast Multicast Service (MBMS) service processing method and system.
  • MBMS Multimedia Broadcast Multicast Service
  • 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 future mobile
  • 3G Third Generation, third generation digital communication
  • the MBMS configuration and retention priority (ARP) mechanism and the MBMS counting mechanism are introduced.
  • the common purpose of these mechanisms is to determine whether the MBMS service needs to continue to be sent or started. send.
  • any of the above mechanisms may bring the following problems: Suppose an MBMS service is being sent according to a pre-arranged time (using Multimedia Broadcast multicast service Single Frequency Network) If the MBMS service with a higher ARP level needs to be sent, and there is no remaining resources at this time, the ARP mechanism will be used on the network to preempt the resources of the MBMS service with a lower ARP level.
  • the MBMS service with a low ARP level stops due to resources being preempted and no remaining resources are available, or is suspended or suspended or suspended by the MCE (Multi-cell/multicast Coordination Entity). Or an MBMS service is being sent according to a pre-arranged time. However, after the network side counts, it is found that the number of users that the MBMS service does not receive or receive by the UE (user equipment) is small, so the network side stops or suspends or suspends the network. The transmission of the MBMS service is described. In short, for some reason, the MBMS service that was originally sent according to the preset time is terminated or suspended.
  • MCE Multi-cell/multicast Coordination Entity
  • the main object of the present invention is to provide an MBMS service processing method and system to support the MCE to recover the suspended MBMS service and ensure accurate recovery of the suspended MBMS service.
  • a multimedia broadcast multicast service MBMS service processing method including:
  • the multi-cell cooperative entity MCE recovers the suspended MBMS service, it is judged whether the MBMS service has been sent or not; when the judgment result is not sent, the MCE is sent to the base.
  • the station's MBMS scheduling information SCHEDULING INFORMATION message resumes the transmission of the MBMS service.
  • the method for determining is:
  • the MCE determines whether the transmission ends according to the information of the received mobility management entity MME. If the MBMS service is resumed during the suspension, the MME sends the MBMS session end request SESSION STOP REQUEST information of the MBMS service to the MCE. Determining that the sending of the MBMS service ends; or
  • the MCE determines whether the MBMS SESSION STOP REQUEST of the MBMS service is sent to the base station. If the MCE sends the MBMS SESSION STOP REQUEST to the base station, the MBMS service is determined to end.
  • the method further includes:
  • the MCE is based on the configuration and retention priority of the MBMS service.
  • the ARP level preempts resources from the MBMS service whose ARP level is lower than the MBMS service being sent.
  • the method further includes:
  • the MCE determines whether it receives the MBMS SESSION STOP REQUEST information of the MBMS service sent by the MME, and stops recovering the MBMS service when it is determined that the reception is too late.
  • the method further includes:
  • the MCE sends an MBMS SESSION STOP REQUEST to the base station.
  • An MBMS service processing method includes: For the suspended MBMS service, if the MBMS SESSION STOP REQUEST information of the MBMS service sent by the MME is received, the MCE sends the MBMS SESSION STOP REQUEST of the MBMS service to the base station.
  • the base station After receiving the MBMS SESSION STOP REQUEST of the MBMS service sent by the MCE, the base station also sends an MBMS SESSION STOP RESPONSE message to the MCE.
  • the method further includes:
  • the base station exits the IP multicast group of the MBMS service, releases its corresponding resources, and deletes the content carried by the MBMS service.
  • An MBMS service processing system including an MBMS service recovery decision unit and an MBMS service recovery execution unit;
  • the MBMS service recovery decision unit is configured to determine whether the MBMS service has been sent after the MBMS service needs to be resumed;
  • the MBMS service recovery execution unit is configured to resume transmission of the MBMS service when the judgment result of the MBMS service recovery decision unit is not sent.
  • the method is configured to: determine, according to the received information of the MME, whether the sending ends; if the scheduled MBMS service is suspended, the MME sends the MCE to the MCE.
  • the MBMS SESSION STOP REQUEST information of the MBMS service determines that the MBMS service transmission ends; or determines whether the transmission ends according to the transmission time period of the MBMS service; if the MBMS is scheduled to be restored at a time other than the transmission time period The service determines that the sending of the MBMS service ends; or
  • the MBMS service recovery execution unit is further configured to:
  • the resource is preempted from the MBMS service whose ARP level is lower than the MBMS service.
  • the MBMS service recovery decision unit is further configured to:
  • the MBMS service recovery execution unit is further configured to send an MBMS SESSION STOP REQUEST to the base station when the judgment result of the MBMS service recovery decision unit is the end of the transmission.
  • the MBMS service processing technology of the present invention can restore the suspended MBMS service, and the process is simple and easy to implement, and can ensure the validity and accuracy of the MCE performing the suspended MBMS service recovery, and avoid the MCE being controlled during the service recovery process.
  • FIG. 1 is a flowchart of MBMS service processing according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a MBMS service processing flow according to the present invention.
  • FIG. 3 is a diagram of an MBMS service processing system according to an embodiment of the present invention. detailed description
  • the MCE may determine, according to information from the MME (Mobility Management Entity), whether the MBMS service has been sent. If not, the MCE resumes the MBMS service transmission; otherwise, MCE can send MBMS SESSION STOP REQUEST (MBMS session end request) To the base station.
  • MME Mobility Management Entity
  • the information from the MME is information sent by the MME to the MCE, and may be the MBMS SESSION STOP REQUEST described above.
  • the MCE can determine whether it receives the MBMS SESSION STOP REQUEST information of the MBMS service sent by the MME. If received, the MCE stops recovering the MBMS service; otherwise, the MCE continues to perform recovery. That is: If the judgment result of the MCE is that the MBMS service has been sent, the MCE stops recovering the transmission of the MBMS service.
  • one of the ideas of the present invention is to restore the suspended MBMS service and resend it in an efficient and accurate manner. Therefore, when the MCE decides to restore the suspended MBMS service, the MCE first checks whether the MBMS service is sent and ends. / or whether there are resources. If the transmission ends, the MCE stops recovering the transmission of the MBMS service (the MBMS service continues to hang); otherwise, the MCE recovers in the specified MBSFN area for the MBMS service. And, the MCE resumes transmission of the MBMS service by transmitting scheduling information in the MBMS SCHEDULING INFORMATION to the base station.
  • the second idea of the present invention is that the suspended MBMS service should inform the base station in time after the end of the core network side transmission. This is mainly because the hang of the MBMS service is carried out in units of the MBSFN area.
  • the suspension is determined by the MCE. If the MCE decides to suspend an MBMS service in a certain MBSFN area, the MCE is directly executed, and The core network side (specifically, the core network side MME and the Broadcast-Multicast Service Centre (BMSC)) is notified, so the core network side also generates related control information of the suspended MBMS service in real time.
  • the continuation is sent to the MCE to ensure normal transmission of the MBMS service in other MBSFN areas under the control of the MCE.
  • the core network side is also normally sent. Therefore, if the MCE receives the MBMS SESSION STOP REQUEST information of the MBMS service sent by the MME on the core network side during the MCE suspension of the MBMS service, Then the MCE should send the MBMS of the MBMS service to the base station in time.
  • SESSION STOP REQUEST 0 It should be noted that there are some differences between the two MBMS SESSION STOP REQUEST contents, because they are sent by different nodes. For details, please refer to the LTE protocol.
  • the base station After receiving the MBMS SESSION STOP REQUEST of the MBMS service sent by the MCE, the base station sends an MBMS SESSION STOP RESPONSE message to the MCE.
  • the base station exits the IP multicast group of the MBMS service, releases its corresponding resource, and deletes the content carried by the MBMS service.
  • MCE in accordance with the MME transmits the received information to determine whether to end; the MME information herein refers to 0 during the restore program if the MCE MBMS service transmitted in a pending MME MBMS SESSION STOP REQUEST, MME to the MCE After the MBMS SESSION STOP REQUEST information of the MBMS service is sent, the MCE determines that the MBMS service transmission ends.
  • the MCE determines whether the sending ends according to the sending time period of the MBMS service. For example, the TV-based MBMS service has a pre-arranged transmission time period. For example, if the time period sent by the TV1 is 9:00 to 10:00, then if the current time is after 10:00, the MBMS service transmission end can be judged. . In this mode, the MCE needs to know the sending time period information of the MBMS service.
  • Mode 3 The MCE determines whether the MBMS SESSION STOP REQUEST of the MBMS service is sent to the base station. If the MBMS service is suspended by the MCE, the MCE sends an MBMS SESSION STOP REQUEST to the base station, and then Determine if the transmission is over.
  • the MCE may add scheduling information of the MBMS service to the MBMS SCHEDULING INFORMATION sent by the base station to notify the base station to resume transmission of the MBMS service.
  • Embodiment 1 Describe the recovery transmission of an MBMS service that is being transmitted because the ARP mechanism is suspended in a certain MBSFN area.
  • an MBMS service that is being sent in an MBSFN area is suspended by the MCE in the MBSFN area.
  • the MCE receives the message sent by the MME.
  • the MBMS SESSION START REQUEST message of the MBMS service and the MCE sends the MBMS SESSION START REQUEST of the MBMS service to the relevant base station.
  • the MCE can resume the MBMS service transmission.
  • the MCE is responsible for resource allocation and scheduling of the MBMS service in the MBSFN area. Therefore, the MCE is aware of the MBMS service resource usage at each time in the network. If the MCE discovers that there are idle resources in the network, the MCE is suspended before being restored.
  • the transmission of the MBMS service, but the recovery of the MCE at this time is not very reasonable only by whether or not there is a resource, and may cause confusion in the transmission of the MBMS service in the network, because the MCE does not know whether the suspended MBMS service is The sending ends. The end of the transmission of the MBMS service is controlled by the MME.
  • the MCE resumes the MBMS service transmission according to the following procedure:
  • the MCE determines that there is a resource in the network
  • the MCE needs to determine whether the restored MBMS service has been sent. If the transmission has ended, the MCE can no longer recover the MBMS service even if there is a resource in the network (the end of the transmission described herein means that the MBMS service ends in the MBSFN area and ends on the core network side);
  • the MCE resumes the transmission of the MBMS service according to the resource distribution in the network.
  • the MCE resumes the transmission of the MBMS service by transmitting MBMS SCHEDULING INFORMATION to the base station.
  • the MCE determines whether the MBMS service is sent or not.
  • the MCE determines whether the MBMS SESSION STOP REQUEST of the MBMS service sent by the MME is received (limited to the time after the MBMS service is suspended by the MCE until the time when the MCE resumes the MBMS service), if If not received, the MCE may resume the MBMS service; otherwise, the MCE needs to further determine whether the MBMS SESSION STOP REQUEST message indicates that the MBMS service ends transmission in the MBSFN area where the MCE plan is restored, and if so, the MCE stops recovering. The MBMS service, otherwise, the MCE resumes transmission of the MBMS service in the MBSFN area.
  • the MCE judges according to the scheduled transmission time period of the MBMS service, and considers that one of the main program types of the MBMS service is a TV service, and the service is required to be the most demanding for the scheduled transmission time period.
  • the scheduled transmission time period of a certain MBMS service then the MBMS service cannot be transmitted because there are subsequent transmissions of other MBMS services. For example, if the time period for TV1 is 9:00 to 10:00, if the time for the MCE to recover the service is after 10:00, then it can be judged that the MBMS service is sent. In this mode, the MCE needs to know the sending time period information of the MBMS service. That is, in the present mode, the MCE judges whether the transmission time period of the MBMS service scheduled to be resumed has ended, and if it is finished, stops the recovery; otherwise, the MCE performs the recovery process.
  • the MCE determines whether the MBMS SESSION STOP REQUEST for the MBMS service is sent to the base station. If the message is sent, the MBMS service has been sent in the MBSFN area, and the MCE does not resume the Otherwise, the MCE further detects whether it is preparing to transmit. If yes, the MCE also stops recovering the MBMS service. Otherwise, the MCE resumes the transmission of the MBMS service in the MBSFN area.
  • the MCE After the judgment ends, if the MBMS service satisfies the condition for resuming transmission, the MCE sends an MBMS SCHEDULING INFORMATION through the relevant base station, and includes the Scheduling information of the MBMS service to activate the transmission of the MBMS service.
  • the MCE suspends the MBMS.
  • the service is only suspended on the MCE side, but is not suspended in the MME, so the MME continues to generate related information of the MBMS service.
  • the MME sends the MBMS SESSION STOP REQUEST message of the MBMS service to the MCE
  • the MCE needs to send an MBMS SESSION STOP REQUEST to the relevant base station to notify the relevant base station that the MBMS service transmission ends.
  • the base station will end the related process of the MBMS service and exit the corresponding multicast group, and the MCE may also release the resources of the MBMS service and reuse the resources.
  • Embodiment 2 Describes the recovery transmission of an MBMS service after the Counting mechanism is suspended in a certain MBSFN area.
  • the difference between this embodiment and the first embodiment is as follows:
  • the reason for causing the MBMS service to be suspended is different.
  • the reason for the recovery is because the network side decides to resume transmission or more users request to continue to send the MBMS service, and the recovery process The process is the same.
  • an MBMS service in an MBSFN area is suspended by the MCE in the MBSFN area.
  • the MCE receives the MBMS of the MBMS service sent by the MME.
  • the SESSION START REQUEST message, and the MCE sends the MBMS SESSION START REQUEST of the MBMS service to the relevant base station.
  • the MCE Since the MBMS service is suspended based on the Counting mechanism, when the MCE needs to restore the MBMS service transmission, the MCE needs to detect whether the MBMS service is sent or not, and whether it needs to support the MBMS service. If the resource is not available, the MCE needs to perform the preemption of resources through the ARP mechanism. If the preemption succeeds, the transmission is resumed. Otherwise, the recovery is stopped.
  • the MCE described herein determines whether the MBMS service is sent. The method and process of ending the delivery are the same as in the first embodiment.
  • the MCE When the network side decides to resume the transmission of a suspended MBMS service, the MCE should first determine whether the service is sent or not. If the transmission ends, the MCE stops recovering. Otherwise, the MCE performs the following process, that is, allocates resources for the MBMS service. At this time, the MCE needs to determine whether there is a resource to send the MBMS service. If there is a resource, the transmission is resumed. Otherwise, the MCE performs the following process, that is, the ARP mechanism is used to preempt the MBMS service. If the preemption succeeds, the transmission is resumed, otherwise the recovery is stopped.
  • the specific MCE can determine whether the MBMS service is sent or not. The following methods can be used:
  • the MCE determines whether the MBMS SESSION STOP REQUEST of the MBMS service sent by the MME is received (limited to the time after the MBMS service is suspended by the MCE until the time when the MCE resumes the MBMS service), if If not received, the MCE may resume the MBMS service; otherwise, the MCE needs to further determine whether the MBMS SESSION STOP REQUEST message indicates that the MBMS service ends transmission in the MBSFN area where the MCE plan is restored, and if so, the MCE stops recovering. The MBMS service, otherwise, the MCE resumes transmission of the MBMS service in the MBSFN area.
  • the MCE judges according to the scheduled transmission time period of the MBMS service, and considers that one of the main program types of the MBMS service is a TV service, and the service is required to be the most demanding for the scheduled transmission time period.
  • the scheduled transmission time period of a certain MBMS service then the MBMS service cannot be transmitted because there are subsequent transmissions of other MBMS services.
  • the time period for the transmission of the TV1 is from 9:00 to 10:00. If the time for the MCE to recover the service is after 10:00, it can be judged that the transmission of the MBMS service ends. In this manner, the MCE needs to know the sending time period information of the MBMS service.
  • the MCE determines whether the transmission time period has been ended for the MBMS service scheduled to be resumed, and stops if it ends; otherwise, the MCE performs a recovery process.
  • the MCE determines whether the MBMS SESSION STOP REQUEST for the MBMS service is sent to the base station. If the message is sent, the MBMS service has been sent in the MBSFN area, and the MCE does not resume the The MCE further detects whether it is preparing to transmit. If yes, the MCE also stops recovering the MBMS service. Otherwise, the MCE resumes the transmission of the MBMS service in the MBSFN area.
  • the MCE preempts the resource from the MBMS service whose ARP level is lower than the ARP level of the MBMS service. If the preemption succeeds, the MCE may be the MBMS service. Provide enough resources to resume sending.
  • the MCE After the judgment ends, if the MBMS service satisfies the condition for resuming transmission, the MCE sends MBMS SCHEDULING INFORMATION through the relevant base station, and includes scheduling information of the MBMS service to activate the transmission of the MBMS service.
  • the MCE suspends the MBMS service only.
  • the hang is performed on the MCE side, but the MME is not suspended, so the MME continues to generate related information of the MBMS service.
  • the MME sends the MBMS SESSION STOP REQUEST message of the MBMS service to the MCE
  • the MCE needs to send an MBMS SESSION STOP REQUEST to the relevant base station to notify the relevant base station that the MBMS service transmission ends.
  • the base station will end the related process of the MBMS service and exit the corresponding multicast group.
  • the MCE may also release resources of the MBMS service and reuse the resources.
  • the MBMS service processing flow in the embodiment of the present invention can be represented as shown in FIG. 1 , and the process includes the following steps:
  • Step 101 The MCE decides to resume the suspended MBMS service.
  • Step 102 Determine whether there is a resource for restoring the sending of the MBMS service, and if yes, proceed to step 103; otherwise, proceed to step 110.
  • Step 103 Determine whether the MBMS service is sent or not. If the sending ends, the process ends; otherwise, the process proceeds to step 104.
  • Step 104 The MCE sends the MBMS SCHEDULING INFORMATION through the relevant base station to activate the sending of the MBMS service.
  • Step 110 The MCE stops recovering the service.
  • the operation of the MBMS service processing of the present invention may represent the process shown in FIG. 2, and the process includes the following steps:
  • Step 210 When it is required to restore the suspended MBMS service, it is determined whether the MBMS service has been sent.
  • Step 220 When the judgment result is that the end of the transmission is not completed, the sending of the MBMS service is resumed.
  • the settings shown in FIG. 3 can be performed. Referring to FIG. 3, FIG. 3 is a diagram of an MBMS service processing system according to an embodiment of the present invention, where the system includes a connected MBMS service recovery decision unit and an MBMS service recovery execution unit.
  • the MBMS service recovery decision unit can determine whether the MBMS service has been sent or not when it needs to recover the suspended MBMS service.
  • the MBMS service recovery execution unit can resume the transmission of the MBMS service when the judgment result is that the transmission is not completed.
  • the MBMS service processing technology of the present invention can restore the suspended MBMS service, and the process is simple and easy to implement, which ensures the validity of the MCE performing the suspended MBMS service recovery and whether it is a method or a system. Accuracy, avoiding problems such as chaotic control plane information and base station sending data errors caused by uncoordinated control plane signaling during MCE recovery, thus effectively improving user satisfaction.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un dispositif pour le traitement d'un service de diffusion/multidiffusion multimédia (MBMS), qui peuvent estimer si l'envoi dudit service de MBMS est terminé lorsqu'une entité de coordination de multidiffusion (MCE) reprend le service de MBMS interrompu. Lorsque le résultat de l'estimation indique que l'envoi n'est pas terminé, la MCE reprend l'envoi dudit service de MBMS par l'envoi d'un message INFORMATIONS D'ORDONNANCEMENT DE MBMS à une station de base. La technologie de traitement de service de MBMS de la présente invention permet la reprise du service de MBMS interrompu, le déroulement est simple et s'exécute facilement, et la reprise par la MCE du service de MBMS interrompu est efficace et précise, ce qui évite les problèmes de confusion des informations de la surface de commande provoqués par la disparité de la signalisation de la surface de commande au cours du processus de reprise du service par la MCE et des données d'erreur envoyées par la station de base. L'utilisateur s'en trouve donc plus satisfait.
PCT/CN2012/071617 2011-03-30 2012-02-24 Procédé et dispositif pour le traitement d'un service de diffusion/multidiffusion multimédia (mbms) WO2012130007A1 (fr)

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WO2015096160A1 (fr) 2013-12-27 2015-07-02 华为技术有限公司 Procédé et dispositif pour maintenir la continuité du service
CN105635983B (zh) * 2014-11-07 2020-06-12 中兴通讯股份有限公司 恢复挂起业务的通知、指示信息处理方法及装置
CN105635985B (zh) * 2014-11-07 2021-01-26 中兴通讯股份有限公司 确定挂起业务的方法及装置、指示信息处理方法及装置
CN110326313B (zh) * 2017-05-05 2020-11-10 华为技术有限公司 多播承载的管理方法和终端设备

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