WO2012019460A1 - 一种多媒体广播多播业务传输方式的转换方法和系统 - Google Patents

一种多媒体广播多播业务传输方式的转换方法和系统 Download PDF

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Publication number
WO2012019460A1
WO2012019460A1 PCT/CN2011/072094 CN2011072094W WO2012019460A1 WO 2012019460 A1 WO2012019460 A1 WO 2012019460A1 CN 2011072094 W CN2011072094 W CN 2011072094W WO 2012019460 A1 WO2012019460 A1 WO 2012019460A1
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Prior art keywords
mbms
multimedia broadcast
mbms service
service
broadcast multicast
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PCT/CN2011/072094
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English (en)
French (fr)
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许辉
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中兴通讯股份有限公司
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Publication of WO2012019460A1 publication Critical patent/WO2012019460A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/02Communication route or path selection, e.g. power-based or shortest path routing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/18Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a method and system for converting a multimedia broadcast multicast service (MBMS) in a Long Term Evolution (LTE) system.
  • MBMS multimedia broadcast multicast service
  • LTE Long Term Evolution
  • the 3rd Generation Partnership Project (3GPP) proposes an MBMS service, that is, a point-to-multipoint service that provides a data source to transmit data to multiple users in a mobile network, MBMS service.
  • the network resource sharing is realized, and the utilization of network resources is improved, especially valuable air interface resources.
  • the MBMS technology studied in the LTE network is called the evolved multimedia broadcast multicast service (E-MBMS, Evolved MBMS).
  • the logical channel of the MBMS service is a Multicast Traffic Channel (MTCH), and each MTCH corresponds to a session of an MBMS service.
  • Multiple MTCH channels can be mapped to the same transport channel, ie, Multicast Channel (MCH); one or more MCHs are mapped to the same Physical Multicast Channel (PMCH), one PMCH is set by one group.
  • MCH Multicast Traffic Channel
  • PMCH Physical Multicast Channel
  • a multimedia broadcast single frequency network (MBSFN) sub-frame is composed.
  • MBSFN area In the existing LTE technology, the concept of an MBSFN area (MBSFN area) is introduced.
  • MBSFN area MBMS services are transmitted in MBSFN mode; different cells in the same MBSFN area use the same resources and content, and The time synchronization sends exactly the same physical signal to achieve the diversity reception gain of the receiving terminal.
  • One or more PMCHs one PMCH may carry one or more MCHs; preferably, one PMCH carries one MCH.
  • the change may be a session start, a service update, or a session stop.
  • the downlink control information (DCI, Downlink Control Information) and the MBMS-Radio Network Temporary Identifier (MMS) are transmitted on the Physical Downlink Control Channel (PDCCH); the UE is based on the DCI.
  • the related information further reads a specific MBMS Control Channel (MCCH) message, which is called an MCCH notification mechanism.
  • MCCH MBMS Control Channel
  • MCCH is a multicast control channel, and MCCH carries one in each MBSFN area.
  • MCH/PMCH configuration information including MBSFN subframe configuration, modulation coding scheme, etc. for each PMCH configuration.
  • the MCCH and MBSFN areas are - corresponding.
  • the MCCH also carries the configuration information of the service, including the identifier of the service in the MBSFN area, the session identifier, the status, and the logical channel ID (LCID).
  • the UE After receiving the specific configuration information of a service by receiving the MCCH, the UE starts to receive data of the service on the MTCH channel.
  • the MCCH configuration information is sent in the form of a system message on the Broadcast Control Channel (BCCH, Broadcast Control Channel); if there are multiple MCCHs, each MCCH corresponds to a set of configuration information in the broadcast message.
  • BCCH Broadcast Control Channel
  • the UE After the UE enters the MBSFN cell, the UE will read the BCCH and MCCH messages to obtain the configuration information of the MBMS service in the target cell, and then receive the data of the required service on the MTCH.
  • the MBMS framework under LTE/System Architecture Evolution is shown in Figure 1. It includes the following network elements: Broadcast and Multicast Service Center (BM-SC), MBMS-GW (MBMS-GW). , MBMS Gateway), Multimedia Broadcast Multicast Service Coordination Function Entity (MCE, MBMS Coordination Entity), Evolution Node B (eNB, Evolved Node B).
  • BM-SC Broadcast and Multicast Service Center
  • MBMS-GW MBMS-GW
  • MCE Multimedia Broadcast Multicast Service Coordination Function Entity
  • eNB Evolution Node B
  • the BM-SC belongs to the service layer network element and is the entry of the content provider. It provides aggregation and transmission of services, user authorization (key generation and transmission), establishment and initiation of MBMS bearers, and initiation of session control. Synchronization between the BM-SC and the eNB can also be achieved.
  • the MBMS-GW is the access gateway of the network and is responsible for processing user data related messages and session related signaling.
  • the MCE is mainly used for scheduling services, that is, selecting appropriate resources (including parameters such as frequency and time) for MBSFN transmission.
  • scheduling services that is, selecting appropriate resources (including parameters such as frequency and time) for MBSFN transmission.
  • the MCE needs to coordinate its corresponding multiple MBSFN transmissions, including MBSFN. The size of the area, the use of wireless resources, etc., so that resources can be used reasonably and efficiently.
  • Ml is the interface between the MBMS-GW and the eNB. It belongs to the User Plane (UP) interface and uses the Internet Protocol (IP) multicast transmission method to transmit MBMS data.
  • UP User Plane
  • IP Internet Protocol
  • M2 It is the interface between the MCE and the eNB. It belongs to the Control Plane (CP) interface and uses PTP (Point To Point) transmission.
  • CP Control Plane
  • PTP Point To Point
  • M3 is the interface between the Mobility Management Entity (MME) and the MCE. It belongs to the CP interface, transmits session control signaling, and uses point-to-point transmission.
  • MME Mobility Management Entity
  • MBMS includes multicast mode and broadcast mode. Because the multicast and broadcast modes differ in business requirements, their business processes are different.
  • each network node does not need to perform the MBMS registration process.
  • the MBMS session start procedure is triggered when the BM-SC is ready to send data; the session start procedure activates all required bearer resources in the network for transmitting MBMS data.
  • the BM-SC identifies the terminal mobile group identity (TMGI, Terminal Mobile Group Identify) of the MBMS service.
  • the session attributes such as QoS (Quality of Service), MBMS service domain, and estimated session length parameters are provided to the relevant network nodes.
  • the BM-SC starts broadcasting data transmission.
  • Each node transmits broadcast data to the UE through a bearer established during the start of the session.
  • the main business processes of the MBMS multicast mode and the broadcast mode are similar. Both need to perform the service declaration, the session start, the MBMS notification, the data transmission, and the end of the session. The difference between the two is that the multicast mode requires the user to sign more. Broadcast group, perform service activation, and generate corresponding billing information according to the time when the user joins and the user quits.
  • MBMS has two bearer modes: broadcast mode and enhanced broadcast mode. Since there is no multicast mode, the eNB is not able to know which MBMS services the UE receives/or is interested in receiving. Enhanced broadcasts range between broadcast and multicast, covering the simplicity of the process in broadcasting and the optimization of resources in multicast. When using MBMS to enhance the broadcast bearer, registration/deregistration from the UE to the BM-SC can be realized only by the join/leave process at the application layer, and signaling interaction and information storage at the network layer are not required. Enhanced broadcast is an optimization and extension of broadcast, for example: In the access network, enhanced broadcast does not send data to cells that do not receive users.
  • the enhanced mode MBMS service when configuring the system frame number (SFN, System Frame Number) and allocating resources, it is necessary to consider the UE status and number of receiving the MBMS service, so that it is necessary to receive/or the UE information that is interested in receiving the MBMS service. Feedback.
  • SFN System Frame Number
  • the counting process refers to a process in which the eNB counts the number of users receiving and interested in receiving an MBMS service during the start of an MBMS service session, and reports the UE feedback information to the network side to confirm whether Use MBSFN transmission method.
  • the eNB uses the MBSFN transmission mode, otherwise the eNB will repeat the counting process using different access probability values. If the counting result in several counting processes does not reach the preset threshold, the eNB Need to stop the MBSFN transmission mode, To change to PTP unicast transmission mode.
  • a need is made to implement MBSFN transmission for activating or deactivating a given MBMS service based on UE reception status.
  • the network side can use PTM (Point To Multipoint) transmission (such as MBSFN) or PTP transmission (such as unicast).
  • PTM Point To Multipoint
  • PTP transmission such as MBSFN
  • PTP transmission mode can be used to save network resources.
  • PTM transmission when the number of receiving UEs is below a certain threshold, PTP can be used. transmission. This is called the MBSFN transmission to activate/deactivate the MBMS service.
  • the inventor found that the prior art has the following problems: According to the feedback result of the UE, it is required to activate or deactivate the MBSFN transmission mode of a given MBMS service, and the MBMS service can be transmitted through PTM or PTP. Continue to transfer, but how to choose the corresponding transmission path, how to determine the bearer resources? These problems have not been provided in the prior art. Summary of the invention
  • the main purpose of the present invention is to provide a method and system for converting a multimedia broadcast multicast service transmission mode, so as to solve the problem that the prior art cannot determine the MBMS service when activating or deactivating the MBSFN transmission mode of a given MBMS service.
  • the present invention provides a method for converting a MBMS transmission mode of a multimedia broadcast multicast service, the method comprising: the network side activating or deactivating a multimedia broadcast single frequency network (MBSFN) according to the feedback information of the received MBMS service status reported by the user equipment (UE) After the transmission mode, the core network determines a transmission path of the MBMS service, and the access network configures a radio bearer resource corresponding to the MBMS service.
  • MMSFN multimedia broadcast single frequency network
  • the core network includes at least one of the following network elements: a Broadcast Multicast Service Center (BM-SC), Mobile Management Entity (MME), MBMS Gateway, Packet Data Network (PDN) Gateway; the access network includes at least one of the following network elements: a Multicast Coordination Entity (MCE), an Evolved Node B (eNB).
  • BM-SC Broadcast Multicast Service Center
  • MME Mobile Management Entity
  • PDN Packet Data Network
  • MCE Multicast Coordination Entity
  • eNB Evolved Node B
  • the transmission path is a path from the BM-SC to the UE, and the transmission path passes through the MBMS gateway or the PDN gateway.
  • the feedback information is sent periodically, triggered by an event, or sent according to an indication from the network side.
  • the event includes at least one of the following: a session start, a session end, a bearer change indication, a cell update, and a cell handover.
  • the indication on the network side is carried by Radio Resource Control (RRC) signaling, and the RRC signaling is transmitted through a Broadcast Control Channel (BCCH) or a Multicast Control Channel (MCCH).
  • RRC Radio Resource Control
  • BCCH Broadcast Control Channel
  • MCCH Multicast Control Channel
  • the feedback information is carried by RRC signaling, Layer 1/Layer 2 (L1/L2) signaling, or Medium Access Control Layer Control Particle (MAC CE).
  • RRC Radio Resource Control
  • L1/L2 Layer 1/Layer 2
  • MAC CE Medium Access Control Layer Control Particle
  • the content of the feedback information includes at least one of the following: a UE status, a UE receiving an MBMS capability indication, an MBSFN area indication, an MBMS service indication, and a UE identifier;
  • the UE status includes at least one of the following: interest receiving, receiving, stopping receiving, receiving bearer change, cell update, and cell handover.
  • the feedback information reported by the UE is carried in any one of the following information: RRC connection request information, RRC connection reconfiguration complete information, RRC connection reestablishment request information, RRC connection reestablishment completion information, connection establishment completion information, cell update information, random Access request information, measurement report, MAC CE, dedicated signaling information.
  • the method further includes: the network side notifying the related eNB or the UE of at least one of the following contents: MBSFN transmission mode activation or deactivation, transmission path of the MBMS service, and radio bearer resource configuration.
  • the network side includes one or more of the following: BM-SC, MME, MCE.
  • the present invention also provides a conversion system for a MBMS transmission mode of a multimedia broadcast multicast service, including: a user equipment module, a system equipment module, a transmission module, a core network, and an access network, where
  • the user equipment module is configured to report, to the network side, feedback information for receiving an MBMS service status, and receive an MBMS service;
  • the system equipment module is configured to select, according to the feedback information of the user equipment module, an MBSFN transmission mode for activating or deactivating an MBMS service;
  • the transmission module is configured to transmit the feedback information, the downlink configuration information, and the MBMS service between the user equipment module and the system equipment module;
  • the access network is configured to configure a radio bearer resource corresponding to the MBMS service after the system equipment module activates or deactivates the MBSFN transmission mode of the MBMS service.
  • the core network includes at least one of the following network elements: a Broadcast Multicast Service Center (BM-SC), a Mobile Management Entity (MME), an MBMS Gateway, and a Packet Data Network (PDN) gateway;
  • BM-SC Broadcast Multicast Service Center
  • MME Mobile Management Entity
  • PDN Packet Data Network
  • the access network includes at least one of the following network elements: a Multicast Coordination Entity (MCE), an evolved Node B (eNB).
  • MCE Multicast Coordination Entity
  • eNB evolved Node B
  • the transmission path is a path from the BM-SC to the UE, and the transmission path passes through the MBMS gateway or the PDN gateway.
  • the feedback information is sent periodically, triggered by an event, or sent according to an indication from the network side.
  • the event includes at least one of the following: a session start, a session end, a bearer change indication, a cell update, and a cell handover.
  • the indication on the network side is carried by radio resource control (RRC) signaling, and the RRC signaling is sent through a broadcast control channel (BCCH) or a multicast control channel (MCCH).
  • RRC radio resource control
  • the feedback information is carried by RRC signaling, L1/L2 signaling, or medium access control layer control granularity (MAC CE).
  • the content of the feedback information includes at least one of the following: a UE status, a UE receiving an MBMS capability indication, an MBSFN area indication, an MBMS service indication, and a UE identifier;
  • the UE status includes at least one of the following: interest receiving, receiving, stopping receiving, receiving bearer change, cell update, and cell handover.
  • the feedback information reported by the UE is carried in any one of the following information: RRC connection request information, RRC connection reconfiguration complete information, RRC connection reestablishment request information, RRC connection reestablishment completion information, connection establishment completion information, cell update information, random Access request information, measurement report, MAC CE, dedicated signaling information.
  • the method and system for converting a multimedia broadcast multicast service transmission mode provided by the present invention, after the network side activates or deactivates the MBSFN transmission mode according to the feedback information of the received MBMS service status reported by the UE, the core network determines the transmission of the MBMS service. Path, the access network configures the corresponding wireless 7-load resources of the MBMS service. After the MBSFN transmission mode of the MBMS service is activated or deactivated, the present invention determines the transmission path of the MBMS service and the corresponding radio resource bearer, thereby ensuring service continuity and improving the user experience.
  • Figure 1 is a schematic diagram of an MBMS framework under the existing LTE/SAE;
  • FIG. 2 is a flowchart of a method for converting a multimedia broadcast multicast service transmission mode according to the present invention
  • FIG. 3 is a schematic diagram of an MBMS framework according to Embodiments 1 and 3 of the present invention.
  • FIG. 4 is a schematic diagram of an MBMS framework according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic structural diagram of a system for converting a multimedia broadcast multicast service transmission mode according to the present invention. detailed description
  • the present invention is used in an LTE system.
  • the core network determines the transmission path of the MBMS service, and the access network configures the corresponding MBMS service wireless.
  • Host resources As shown in Fig. 1, the broken lines in the figure show the PTP transmission path and the transmission path of the MBSFN, respectively.
  • the core network includes at least one of the following network elements: a BM-SC, an MME, an MBMS gateway, and a PDN gateway.
  • the access network includes at least one of the following network elements: an MCE, an eNB.
  • the transmission path refers to a path from the BM-SC to the UE.
  • the network side may notify the relevant eNB or the UE of at least one of the following contents: MBSFN
  • the transmission mode is activated or deactivated, the transmission path of the MBMS service, and the radio bearer resource configuration.
  • the so-called related eNB refers to an eNB that can participate in the transmission of the MBMS service; the so-called related UE refers to the UE that receives the MBMS service.
  • a method for converting a multimedia broadcast multicast service transmission mode provided by the present invention mainly includes the following steps:
  • Step 201 The UE reports feedback information about receiving the MBMS service status.
  • the UE is a user equipment that receives the MBMS service.
  • the feedback information is for a specific MBMS service or an MBMS service group, and the report of the feedback information may be periodically reported, triggered by an event, or sent according to an indication of the network side.
  • the triggering events include: session start, session end, bearer change indication, cell update, cell handover, and the like.
  • the indication on the network side may be carried by radio resource control (RRC) signaling, and the RRC signaling is sent through a BCCH or an MCCH.
  • RRC radio resource control
  • the content of the feedback information includes one or more of the following: a UE status, a UE receiving an MBMS capability indication, an MBSFN area indication, an MBMS service indication, and a UE identifier;
  • the MBSFN area indication may be an MBSFN area identifier or a notification indication
  • the notification message may be an MBMS service indicator, a PMCH identifier, a session identifier, a LCID (Logic Channel Identity), or a service list index.
  • the UE status includes: Receiving, stopping receiving, receiving bearer change, cell update, cell handover, and the like.
  • the feedback information reported by the UE is carried by RRC signaling, Layer 1/Layer 2 (L1/L2) signaling, or Medium Access Control Layer Control Particle (MAC CE); and may be carried in any of the following information: RRC Connection Request Information, RRC Connection Reconfiguration Complete Information, RRC Connection Reestablishment Request Information, RRC Connection Reestablishment Complete Information, Connection Setup Complete Information, Cell Update Information, Random Access Request Information, Measurement Report, MAC CE, Dedicated Signaling Information.
  • RRC Connection Request Information RRC Connection Reconfiguration Complete Information
  • RRC Connection Reestablishment Request Information RRC Connection Reestablishment Complete Information
  • Connection Setup Complete Information Connection Setup Complete Information
  • Cell Update Information Random Access Request Information
  • Measurement Report Measurement Report
  • MAC CE Dedicated Signaling Information.
  • Step 202 The network side selects an MBSFN transmission mode for activating or deactivating the MBMS service according to the feedback information reported by the UE. If the activation is selected, step 203 is performed; otherwise, step 206 is performed.
  • Step 203 The network side selects to activate the MBSFN transmission mode in the MBSFN area, and sends indication information to the related eNB and the UE.
  • the related eNB refers to an eNB that can participate in the MBSFN transmission in the MBSFN area.
  • the so-called related UE refers to the UE that receives the MBMS service in the MBSFN area.
  • the indication information includes the following contents: The MBSFN transmission of the MBMS service is about to start, and the corresponding PTP transmission is stopped or continues.
  • Step 204 The BM-SC sends the user plane data to the eNB through the MBMS gateway, and the control plane signaling is sent to the eNB by using the MME and the MCE.
  • Step 205 The eNB transmits the MBMS service to the UE by using the MBSFN.
  • the UE refers to a UE having MBSFN reception capability.
  • Step 206 The core network selects a PTP transmission path. If the original path is selected (via the MBMS gateway), step 207 is performed; if a new path is selected (via the PDN gateway), step 208 is performed.
  • the transmission path includes: the original path, that is, the MBMS gateway reaches the eNB; the new path, that is, the PDN gateway arrives at the eNB.
  • Step 207 The BM-SC sends the user plane data to the eNB through the MBMS gateway, and the control plane signal is sent to the eNB via the MME and the MCE, and the process goes to step 209.
  • the user plane data refers to MBMS service data.
  • Step 208 The BM-SC sends the MBMS service to the serving gateway (S-GW, Serving Gateway) through the PDN gateway, and the S-GW sends the eNB to the eNB, and proceeds to step 209.
  • S-GW Serving Gateway
  • Step 209 The eNB configures the PTP of the MBMS service to transmit the radio resources and notifies the UE.
  • the PTP radio bearer refers to a physical downlink shared channel (PDSCH, Physical
  • Step 210 The eNB transmits the MBMS service to the UE through the PTP, and then the process ends.
  • the method for converting the above-mentioned multimedia broadcast multicast service transmission mode will be further elaborated below in conjunction with the specific embodiments.
  • the application scenario of the first embodiment of the present invention is that the network side is transmitting the MBMS service in the MBSFN manner, and the network side is deactivated according to the feedback information of the MBMS service status reported by the UE.
  • the MBMS service is transmitted through the MBMS gateway, and the eNB configures the radio bearer resources transmitted by the PTP.
  • the corresponding processing specifically includes the following steps:
  • Step 301 Deactivate the network side according to the feedback information that the UE receives the MBMS service status.
  • the MBSFN transmission mode of the MBMS service and notifying the eNB or the UE.
  • the eNB refers to all eNBs in the MBSFN area; the UE refers to a UE with MBMS receiving capability, and the UE is in an RRC connected mode or an RRC idle mode. UE receiving
  • MBMS service status includes: interested in receiving, receiving, stopping receiving, receiving bearer changes, Cell update, cell handover, etc.
  • the content of the feedback information sent by the UE includes one or more of the following: UE status, UE receiving
  • MBMS capability indication MBSFN area indication, MBMS service indication, UE identity;
  • the MBSFN area indication may be an MBSFN area identifier or a notification indicator;
  • the MBMS service indication may be an MBMS service identifier, a PMCH identifier, a session identifier, an LCID, or a service list index.
  • the network side includes one or more of the following: BM-SC, MME, MCE.
  • deactivation means that the MBMS service stops using the MBSFN transmission mode, and the MBMS service after the MBSFN transmission is stopped can be transmitted through the unicast PTP or the transmission is stopped.
  • the present invention is described by taking a unicast PTP transmission as an example.
  • the notification eNB or the UE refers to signaling the eNB or the UE to:
  • the MBSFN transmission of the MBMS service is about to stop, and the PTP transmission of the service is about to start.
  • Step 302 The BM-SC transmits the user plane data to the eNB through the MBMS gateway.
  • the BM-SC refers to a BM-SC associated with a deactivated MBSFN area
  • the user plane data refers to specific MBMS service data
  • the MBMS gateway refers to a SGi between a BM-SC and an MBMS gateway.
  • the -mb interface; the transmission to the eNB means that the data is transmitted through the M1 interface between the MBMS gateway and the eNB; the eNB refers to the eNB in the MBSFN area.
  • Step 303 The BM-SC transmits the control plane signaling to the MME through the MBMS-GW, and the MME transmits the signaling to the MCE through the M3 interface, and the MCE transmits the signaling to the eNB via the M2 interface.
  • the control plane signaling mainly includes: MBSFN transmission stop indication information of the MBMS service,
  • the corresponding MBSFN bearer resource release message of the MBMS service the unicast bearer resource request establishment message of the MBMS service, and the like.
  • the eNB refers to all eNBs participating in MBSFN transmission in the MBSFN area.
  • Step 304 The eNB configures the PTP of the MBMS service to transmit the radio bearer resource and notifies the UE.
  • the PTP refers to a unicast transmission;
  • the radio bearer resource refers to a resource on a PDSCH.
  • the eNB notifies the UE that the eNB notifies the UE of the unicast resource configuration, and the eNB notifies the UE in the RRC idle state to enter the RRC connected state; the UE refers to the UE that receives the MBMS service in the eNB.
  • Step 305 The eNB sends the MBMS service to the UE by using the PTP.
  • the application scenario of the second embodiment of the present invention is that the network side is transmitting the MBMS service in the MBSFN mode. According to the feedback information of the received MBMS service status reported by the UE, the network side deactivates the MBSFN transmission mode, the PDN gateway transmits the MBMS service, and the eNB configures the PTP. Transmitted radio bearer resources.
  • the corresponding processing specifically includes the following steps:
  • Step 401 The network side deactivates the MBSFN transmission mode of the MBMS service according to the UE receiving the feedback information of the MBMS service status, and notifies the eNB or the UE.
  • the eNB refers to all eNBs in the MBSFN area; the UE refers to a UE with MBMS receiving capability, and the UE is in an RRC connected mode or an RRC idle mode.
  • the UE receiving the MBMS service status includes: receiving, receiving, stopping receiving, receiving bearer change, cell update, cell handover, and the like.
  • the content of the feedback information sent by the UE includes one or more of the following: a UE status, a UE receiving an MBMS capability indication, an MBSFN area indication, an MBMS service indication, and a UE identifier;
  • the MBSFN area indication may be an MBSFN area identifier or a notification indicator
  • the MBMS service indication may be an MBMS service identifier, a PMCH identifier, a session identifier, an LCID, or a service list index
  • the network side includes one or more of the following: BM-SC, MME, MCE.
  • deactivation means that the MBMS service stops using the MBSFN transmission mode, and the MBMS service after the MBSFN transmission is stopped can be transmitted through the unicast PTP or the transmission is stopped.
  • the present invention is described by taking the unicast PTP transmission as an example.
  • the notifying the eNB or the UE means notifying the eNB or the UE by signaling: MBMS
  • the MBSFN transmission of the service is about to stop, and the PTP transmission of the service is about to start.
  • Step 402 The BM-SC transmits the user plane data to the S-GW through the PDN gateway, and the S-GW sends the user data to the eNB through the S1-U interface.
  • the BM-SC refers to a BM-SC associated with a deactivated MBSFN area
  • the user plane data refers to specific MBMS service data
  • the PDN gateway refers to a SGi between a BM-SC and a PDN gateway.
  • the interface refers to the transmission through the S5/S8 interface between the PDN gateway and the S-GW
  • the eNB refers to the eNB in the MBSFN area.
  • Step 403 The BM-SC transmits the control plane signaling to the S-GW through the PDN gateway, and the S-GW transmits the signaling to the MME via the S11, and the MME transmits the signaling to the eNB via the S1-MME interface.
  • the control plane signaling mainly includes: MBSFN transmission stop indication information of the MBMS service, an MBSFN bearer resource release message corresponding to the MBMS service, a unicast bearer resource request setup message of the MBMS service, and the like; the eNB refers to the MBSFN in the MBSFN area. All eNBs transmitted.
  • Step 404 The eNB configures the PTP of the MBMS service to transmit the radio bearer resource and notifies the UE.
  • the PTP refers to the unicast transmission;
  • the radio bearer resource refers to the resource on the PDSCH, and is used to transmit the MBMS service.
  • the eNB notifies the UE that the eNB notifies the UE of the unicast resource configuration, and the eNB notifies the UE in the RRC idle state to enter.
  • the foregoing UE refers to a UE that receives an MBMS service in an eNB.
  • Step 405 The eNB sends the MBMS service to the UE by using the PTP.
  • the application scenario of the third embodiment of the present invention is that the network side is transmitting the MBMS service in the PTP mode. According to the feedback information of the MBMS service status reported by the UE, the network side activates the MBSFN transmission mode, and the MBMS service transmits the MBMS service, and the MCE configures the PTM transmission. Wireless bearer resources.
  • the corresponding processing specifically includes the following steps:
  • Step 501 The network side activates according to the feedback information that the UE receives the MBMS service status.
  • the MBSFN transmission mode of the MBMS service and notifying the eNB or the UE.
  • the eNB refers to all the eNBs in the MBSFN area; the UE refers to the UE that is receiving the MBMS service in the PTP mode, and the UE is in the RRC connected mode.
  • the UE receiving the MBMS service status includes: receiving, receiving, stopping receiving, receiving bearer change, cell update, cell handover, and the like.
  • the content of the feedback information sent by the UE includes one or more of the following: a UE status, a UE receiving an MBMS capability indication, an MBSFN area indication, an MBMS service indication, and a UE identifier;
  • the MBSFN area indication may be an MBSFN area identifier or a notification indicator
  • the MBMS service indication may be an MBMS service identifier, a PMCH identifier, a session identifier, an LCID, or a service list index
  • the network side includes one or more of the following: BM-SC, MME, MCE.
  • the activation means that the MBMS service starts to use the MBSFN transmission mode.
  • the notifying the eNB or the UE means notifying the eNB or the UE by signaling that the MBSFN transmission of the MBMS service is about to start, and the corresponding PTP transmission is stopped or continues. After the MBSFN transmission of the service starts, the corresponding PTP transmission may be stopped or continued. For example, a UE that originally receives the MBMS service through the PTP and does not have the MBSFN receiving capability can continue to receive the service through the PTP, if all the UEs have The MBSFN receives the capability, then stops the PTP transmission.
  • Step 502 The BM-SC transmits the user plane data to the eNB through the MBMS gateway.
  • the BM-SC refers to a BM-SC associated with a deactivated MBSFN area
  • the user plane data refers to specific MBMS service data
  • the MBMS gateway refers to a SGi between a BM-SC and an MBMS gateway.
  • - mb interface the transmission to the eNB means that the data is transmitted through the M1 interface between the MBMS gateway and the eNB; the eNB refers to the eNB participating in the service transmission in the MBSFN area.
  • Step 503 The BM-SC transmits the control plane signaling to the MME through the MBMS gateway, and the MME
  • the M3 interface transmits signaling to the MCE
  • the MCE transmits signaling to the eNB via the M2 interface.
  • the control plane signaling mainly includes: MBSFN transmission start indication information of the MBMS service,
  • the corresponding PTP bearer resource release message of the MBMS service the MBSFN bearer resource request establishment message of the MBMS service, and the like.
  • the MCE refers to an MCE participating in MBSFN transmission in an MBSFN area
  • the eNB refers to all eNBs participating in MBSFN transmission in an MBSFN area.
  • Step 504 The MCE configures the PTM of the MBMS service to transmit the wireless resource and indicates the cNB.
  • the MCE refers to an MCE that participates in the MBSFN transmission in the MBSFN area.
  • the MCE indicates that the eNB refers to sending a signaling indication through the M2 interface, where the indication includes configuration information and scheduling information of the MBSFN wireless transmission resource.
  • Step 505 The eNB sends the MBMS service to the UE by using the PTM.
  • the present invention further provides a conversion system for a multimedia broadcast multicast service transmission mode, as shown in FIG. 5, including: a user equipment module 10, a system equipment module 20, and a transmission method. Module 30, core network 40 and access network 50.
  • the user equipment module 10 is configured to report the feedback information of the MBMS service status to the network side, and receive the MBMS service.
  • the system equipment module 20 is configured to select an MBSFN transmission mode for activating or deactivating the MBMS service according to the feedback information of the user equipment module 10.
  • the transmission module 30 is configured to transmit uplink feedback information (or also transmit feedback request information), downlink configuration information, and MBMS service between the user equipment module 10 and the system equipment module 20.
  • the core network 40 is configured to determine a transmission path of the MBMS service after the system equipment module 20 activates or deactivates the MBSFN transmission mode of the MBMS service.
  • the access network 50 is configured to configure a corresponding radio bearer resource of the MBMS service after the system equipment module 20 activates or deactivates the MBSFN transmission mode of the MBMS service.
  • the present invention activates or deactivates the MBSFN transmission mode of the MBMS service. After that, the transmission path of the MBMS service and the corresponding radio resource bearer are determined, thereby ensuring service continuity and improving the user experience.

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Abstract

本发明公开了一种多媒体广播多播业务(MBMS)传输方式的转换方法和系统,方法包括:网络侧根据用户设备(UE)上报的接收MBMS业务状态的反馈信息激活或去激活多媒体广播单频网络(MBSFN)传输方式之后,核心网确定MBMS业务的传输路径,接入网配置MBMS业务相应的无线承载资源。通过本发明,在激活或去激活MBMS业务的MBSFN传输方式之后,确定MBMS业务的传输路径和相应的无线资源承载,从而保证了业务连续性,提高了用户体验。

Description

一种多媒体广播多播业务传输方式的转换方法和系统 技术领域
本发明涉及无线通信领域,尤其涉及一种在长期演进 ( LTE, Long Term Evolution ) 系统中, 多媒体广播多播业务( MBMS , Multimedia Broadcast Multicast Service )传输方式的转换方法和系统。 背景技术
为了有效利用移动网络资源, 第三代合作伙伴计划 (3GPP , 3rd Generation Partnership Project )提出了 MBMS业务, 即在移动网络中提供一 个数据源向多个用户发送数据的点到多点业务, MBMS业务实现了网络资 源共享, 提高了网络资源的利用率, 尤其是宝贵的空中接口资源。 在 LTE 网络中研究的 MBMS技术, 称为演进的多媒体广播多播业务(E-MBMS , Evolved MBMS )。
在现有的 LTE 技术中, MBMS 业务的逻辑信道为多播业务信道 ( MTCH, Multicast Traffic Channel ), 且每一个 MTCH对应一个 MBMS业 务的会话。 多个 MTCH 信道可以映射到同一个传输信道, 即多播信道 ( MCH, Multicast Channel )上; 一个或多个 MCH映射到同一个物理多播 信道( PMCH, Physical Multicast Channel ), 一个 PMCH由一组多媒体广播 单频网络 ( MBSFN, Multimedia Broadcast Single Frequency Network )子帧 组成。
在现有的 LTE技术中, 引入了 MBSFN区域( MBSFN area ) 的概念, 在一个 MBSFN区域中, MBMS业务釆用 MBSFN方式发送;同一个 MBSFN 区域中不同的小区釆用相同的资源和内容, 且时间同步的发送完全一样的 物理信号, 以实现接收终端的分集接收增益。在一个 MBSFN区域中可以配 置一个或多个 PMCH, —个 PMCH可以承载一个或多个 MCH; 优选的, 一个 PMCH承载一个 MCH。在 LTE系统中, 如果需要通知用户设备 ( UE, User Equipment ) 某个 MBMS业务将要发生变化, 这些变化可以是会话开 始 ( session start )、 业务 载更新或会话停止 ( session stop )等, 可以先在 物理下行控制信道( PDCCH, Physical Downlink Control Channel )上发送下 行控制信息( DCI, Downlink Control Information )和 MBMS无线网络临时 标志符(M-RNTI, MBMS-Radio Network Temporary Identifier ); UE才艮据 DCI中的相关信息进一步读取具体的 MBMS控制信道(MCCH, Multicast Control Channel ) 消息, 这称为 MCCH通知(notification )机制。
MCCH 为多播控制信道, MCCH 承载一个 MBSFN 区域中每个
MCH/PMCH的配置信息 , 包括每个 PMCH配置的 MBSFN子帧配置、调制 编码方案等等。 现有技术中, MCCH和 MBSFN区域是——对应的。
MCCH还承载业务的配置信息, 包括 MBSFN区域中业务的标识、 会 话标识、 状态、 逻辑信道标识 (LCID, Logical Channel ID )等信息。 UE 通过接收 MCCH获得一个业务的具体配置信息后,在 MTCH信道上开始接 收该业务的数据。 MCCH 的配置信息在广播控制信道(BCCH, Broadcast Control Channel )上通过系统消息的形式发送; 如果存在多个 MCCH , 则每 一个 MCCH在广播消息中对应一组配置信息。
当 UE进入 MBSFN小区后, UE将读取 BCCH、 MCCH的消息 , 以获 取目标小区中 MBMS业务的配置信息,然后在 MTCH上接收所需业务的数 据。
LTE/系统架构演进( SAE, System Architecture Evolution )下的 MBMS 框架如图 1所示,包括以下网元:广播多播业务中心(BM-SC, Broadcast and multicast Service Center ), MBMS网关( MBMS-GW, MBMS Gateway )、 多 媒体广播多播业务协调功能实体( MCE , MBMS Coordination Entity )、 演进 的节点 B ( eNB, Evolved Node B )。
其中, BM-SC属于业务层网元, 是内容提供者的入口, 提供业务的汇 聚和发送, 用户的授权(密钥的产生和发送), MBMS承载的建立和发起, 会话控制的发起等, 同时还可以实现 BM-SC 与 eNB 之间的同步。 MBMS-GW作为 BM-SC和 eNB之间的一个节点, 是网络的接入网关, 负 责处理用户数据相关的报文和会话相关的信令。
对于单个 MBMS业务, MCE主要用于业务的调度, 即选择合适的资 源 (包括频率、 时间等参数), 进行 MBSFN传输; 对于多个 MBMS业务, MCE需要协调其相应的多个 MBSFN传输, 包括 MBSFN区域的大小, 无 线资源的使用等, 以便能够合理的、 高效的使用资源。
如图 1 所示, 上述的逻辑实体的接口如下:
Ml: 为 MBMS-GW和 eNB之间的接口,属于用户面( UP, User Plane ) 接口, 釆用互联网协议( IP , Internet Protocol )多播传输方式, 传送 MBMS 数据。
M2: 为 MCE和 eNB之间的接口, 属于控制面 (CP, Control Plane ) 接口, 釆用点到点 ( PTP , Point To Point )传输方式。
M3: 为移动管理实体(MME, Mobility Management Entity )和 MCE 之间的接口, 属于 CP接口, 传输会话控制信令, 釆用点到点传输方式。
MBMS 包括多播模式和广播模式, 由于多播和广播模式在业务需求上 存在不同, 导致其业务流程也不同。
在 MBMS广播模式下, 由于广播业务向无线网络中的所有用户发送信 息, 因此, 各网络节点不需要执行 MBMS注册过程。 当 BM-SC准备好发 送数据时触发 MBMS 会话开始过程; 会话开始过程激活网络中用于传输 MBMS数据的所有需要的承载资源。 通过这个过程, BM-SC将该 MBMS 载业务的终端移动组标识(TMGI, Terminal Mobile Group Identify ), 服 务质量(QoS , Quality of Service ), MBMS业务域、 估计会话长度参数等会 话属性提供给相关网络节点。 下游节点完成相应工作后, BM-SC开始广播 数据传输。 各个节点通过会话开始过程中建立的承载传输广播数据到 UE。
MBMS多播模式和广播模式的主要业务流程比较相似, 都需要依次进 行业务声明、 会话开始、 MBMS通知、 数据传送和会话结束的处理; 二者 的区别在于, 多播模式还需要用户签约相应多播组, 进行业务激活, 并依 据用户加入和用户退出的时刻产生相应的计费信息。
在 LTE中, MBMS有两种承载模式: 广播模式和增强型广播模式。 由 于没有多播模式, 因此, eNB并不能够获知 UE接收 /或者感兴趣接收哪些 MBMS业务。 增强广播介于广播和多播之间, 涵盖了广播中流程简单和多 播中资源优化的优点。 在使用 MBMS增强广播承载时, 只需要在应用层上 通过加入 /离开过程就可以实现从 UE到 BM-SC的注册 /注销, 无需在 载 网络层进行信令交互和信息存储。 增强广播是对广播的一种优化和扩展, 例如: 在接入网, 增强广播不会向没有接收用户的小区发送数据。 对于增 强型模式的 MBMS业务, 在配置系统帧号 ( SFN , System Frame Number ) 和分配资源时需要考虑接收 MBMS业务的 UE状态和数量, 这样就需要接 收 /或者感兴趣接收 MBMS业务的 UE信息进行反馈。
为了使 eNB能够得到各个小区内有 MBMS业务需求的用户数, MBMS 系统引入了计数过程 ( counting )。 counting过程, 是指一个 MBMS业务会 话开始时, 或者在会话进行过程中, eNB 统计小区内接收和感兴趣接收某 MBMS业务用户数的过程, 并将 UE反馈信息上报给网络侧, 用以确认是 否釆用 MBSFN传输方式。
如果计数结果达到预设的门限, 则 eNB使用 MBSFN传输模式, 否则 eNB 将使用不同的接入概率值重复进行计数过程, 如果几次计数过程中的 计数结果都没有达到预设的门限, 则 eNB需要停止 MBSFN传输模式, 可 以改为 PTP单播传输模式。
在 3GPP版本 10 ( ReleaselO ) 中, 提出了根据 UE接收状态实现激活 或去激活给定 MBMS业务的 MBSFN传输的需求。 对于某个 MBMS业务, 网络侧可以釆用点到多点( PTM, Point To Multipoint )传输(如 MBSFN ), 也可以釆用 PTP传输(如单播)。 当釆用 PTP传输方式时, 接收 UE数量超 过一定门限时, 可以釆用 PTM传输方式, 以节省网络资源; 同样, 当釆用 PTM传输时, 接收 UE数量低于一定门限时, 可以釆用 PTP传输。 这称之 为激活 /去激活 MBMS业务的 MBSFN传输。
在对现有技术的研究和实践过程中, 发明人发现现有技术存在以下问 题: 根据 UE反馈结果需要激活或去激活给定 MBMS业务的 MBSFN传输 模式, 该 MBMS业务可以通过 PTM或 PTP传输方式继续传输, 但是如何 选择相应的传输路径, 如何确定承载资源? 这些问题, 在现有技术中都没 有提供相关的解决方案。 发明内容
有鉴于此, 本发明的主要目的在于提供一种多媒体广播多播业务传输 方式的转换方法和系统, 以解决现有技术在激活或去激活给定 MBMS业务 的 MBSFN传输模式时, 无法确定 MBMS业务的传输路径和 7 载资源的问 题。
为达到上述目的, 本发明的技术方案是这样实现的:
本发明提供了一种多媒体广播多播业务 MBMS传输方式的转换方法, 该方法包括: 网络侧根据用户设备 ( UE )上报的接收 MBMS业务状态的反 馈信息激活或去激活多媒体广播单频网络 ( MBSFN )传输方式之后, 核心 网确定所述 MBMS业务的传输路径 , 接入网配置所述 MBMS业务相应的 无线承载资源。
所述核心网包括以下网元中的至少一种:广播多播业务中心( BM-SC )、 移动管理实体 ( MME )、 MBMS网关、 分组数据网 ( PDN ) 网关; 所述接入网包括以下网元中的至少一种: 多播协调实体( MCE )、 演进 的节点 B ( eNB )。
所述传输路径为从 BM-SC到 UE之间的路径,且传输路径经过 MBMS 网关或 PDN网关。
所述反馈信息周期性发送, 或通过事件触发, 或根据网络侧的指示发 送。
所述事件包括以下至少一种: 会话开始、 会话结束、 承载变更指示、 小区更新、 小区切换。
所述网络侧的指示通过无线资源控制 (RRC )信令承载, 所述 RRC信 令通过广播控制信道(BCCH )或多播控制信道(MCCH )发送。
所述反馈信息通过 RRC信令、 层 1/层 2 ( L1/L2 )信令或媒体接入控制 层控制粒子 (MAC CE )承载。
所述反馈信息的内容包括以下至少一种: UE状态、 UE接收 MBMS能 力指示、 MBSFN区域指示、 MBMS业务指示、 UE标识;
所述 UE状态包括以下至少一种: 感兴趣接收、 正在接收、 停止接收、 接收承载变更、 小区更新、 小区切换。
所述 UE上报的反馈信息承载于以下任意一种信息中: RRC连接请求 信息、 RRC连接重配置完成信息、 RRC连接重建请求信息、 RRC连接重建 完成信息、 连接建立完成信息、 小区更新信息、 随机接入请求信息、 测量 报告中、 MAC CE、 专用信令信息。
该方法进一步包括: 网络侧通知相关 eNB或 UE以下内容中的至少一 种: MBSFN传输方式激活或去激活、 MBMS业务的传输路径、无线承载资 源配置。
所述网络侧包括以下一种或几种: BM-SC、 MME、 MCE。 本发明还提供了一种多媒体广播多播业务 MBMS 传输方式的转换系 统, 包括: 用户设备模块、 系统设备模块、 传输模块、 核心网和接入网, 其中,
所述用户设备模块, 用于向网络侧上报接收 MBMS业务状态的反馈信 息, 并接收 MBMS业务;
所述系统设备模块, 用于根据所述用户设备模块的反馈信息, 选择激 活或去激活 MBMS业务的 MBSFN传输方式;
所述传输模块, 用于在所述用户设备模块和系统设备模块之间传输所 述反馈信息、 下行配置信息和 MBMS业务;
所述核心网, 用于在所述系统设备模块激活或去激活 MBMS 业务的 MBSFN传输方式之后, 确定所述 MBMS业务的传输路径;
所述接入网, 用于在所述系统设备模块激活或去激活 MBMS 业务的 MBSFN传输方式之后 , 配置所述 MBMS业务相应的无线承载资源。
所述核心网包括以下网元中的至少一种:广播多播业务中心( BM-SC )、 移动管理实体 ( MME )、 MBMS网关、 分组数据网 ( PDN ) 网关;
接入网包括以下网元中的至少一种: 多播协调实体(MCE )、 演进的节 点 B ( eNB )。
所述传输路径为从 BM-SC到 UE之间的路径,且传输路径经过 MBMS 网关或 PDN网关。
所述反馈信息周期性发送, 或通过事件触发, 或根据网络侧的指示发 送。
所述事件包括以下至少一种: 会话开始、 会话结束、 承载变更指示、 小区更新、 小区切换。
所述网络侧的指示通过无线资源控制 (RRC )信令承载, 所述 RRC信 令通过广播控制信道(BCCH )或多播控制信道(MCCH )发送。 反馈信息通过 RRC信令、 L1/L2信令或媒体接入控制层控制粒子( MAC CE )承载。
所述反馈信息的内容包括以下至少一种: UE状态、 UE接收 MBMS能 力指示、 MBSFN区域指示、 MBMS业务指示、 UE标识;
所述 UE状态包括以下至少一种: 感兴趣接收、 正在接收、 停止接收、 接收承载变更、 小区更新、 小区切换。
所述 UE上报的反馈信息承载于以下任意一种信息中: RRC连接请求 信息、 RRC连接重配置完成信息、 RRC连接重建请求信息、 RRC连接重建 完成信息、 连接建立完成信息、 小区更新信息、 随机接入请求信息、 测量 报告中、 MAC CE、 专用信令信息。
本发明所提供的一种多媒体广播多播业务传输方式的转换方法和系 统, 在网络侧根据 UE上报的接收 MBMS业务状态的反馈信息激活或去激 活 MBSFN传输方式之后, 核心网确定 MBMS业务的传输路径, 接入网配 置 MBMS业务相应的无线 7 载资源。 本发明在激活或去激活 MBMS业务 的 MBSFN传输方式之后, 确定 MBMS业务的传输路径和相应的无线资源 承载, 从而保证了业务连续性, 提高了用户体验。 附图说明
图 1为现有 LTE/SAE下的 MBMS框架示意图;
图 2为本发明一种多媒体广播多播业务传输方式的转换方法的流程图; 图 3为本发明实施例一、 三的 MBMS框架示意图;
图 4为本发明实施例二的 MBMS框架示意图;
图 5 为本发明一种多媒体广播多播业务传输方式的转换系统的结构示 意图。 具体实施方式
下面结合附图和具体实施例对本发明的技术方案进一步详细阐述。 本发明釆用在 LTE系统中, 网络侧根据 UE上报的接收 MBMS业务状 态的反馈信息, 激活或去激活 MBSFN传输方式之后, 核心网确定 MBMS 业务的传输路径, 接入网配置 MBMS业务相应的无线承载资源。 如图 1所 示, 图中的虚线分别示出了 PTP传输路径和 MBSFN的传输路径。
所述的核心网包括以下网元中的至少一种: BM-SC、 MME、 MBMS网 关、 PDN 网关; 所述的接入网包括以下网元中的至少一种: MCE、 eNB。 所述的传输路径是指从 BM-SC到 UE之间的路径; 在确定了 MBMS业务 的传输路径和相应的无线承载资源后, 网络侧可以通知相关 eNB或 UE以 下内容的至少一种: MBSFN传输方式激活或去激活、 MBMS业务的传输路 径、无线承载资源配置。所谓相关 eNB,是指可参与 MBMS业务传输的 eNB; 所谓相关 UE, 是指接收 MBMS业务的 UE。
本发明所提供的一种多媒体广播多播业务传输方式的转换方法,如图 2 所示, 主要包括以下步骤:
步骤 201 , UE上报接收 MBMS业务状态的反馈信息。
其中, UE是指接收 MBMS 业务的用户设备; 反馈信息是针对特定 MBMS业务或 MBMS业务组的,且该反馈信息的上报,可以是周期性上报、 事件触发或者根据网络侧的指示发送。 触发事件包括: 会话开始、 会话结 束、 承载变更指示、 小区更新、 小区切换等等。 优选的, 上述网络侧的指 示可以通过无线资源控制(RRC, Radio Resource Control )信令承载, 所述 RRC信令通过 BCCH或 MCCH发送。
此外, 反馈信息的内容包括以下的一种或多种: UE状态、 UE接收 MBMS能力指示、 MBSFN区域指示、 MBMS业务指示、 UE标识;
优选的, MBSFN 区域指示可以为 MBSFN 区域标识或通知指示 ( notification indicator ); MBMS业务指示可以为 MBMS业务标识、 PMCH 标识、会话标识 ( session ID )、還辑信道标识 ( LCID, Logic Channel Identity ) 或业务列表索引; 所述 UE状态包括: 感兴趣接收、 正在接收、 停止接收、 接收承载变更、 小区更新、 小区切换等等。 优选的, 所述 UE接收 MBMS 能力指示是指接收 MBSFN传输的能力指示,主要用于 UE移动过程中提高 业务连续性, 可以用一个比特 C指示, 如 C=l表示 UE具备 MBSFN接收 能力, C=0表示 UE不具备 MBSFN接收能力。
UE上报的反馈信息通过 RRC信令、 层 1/层 2 ( L1/L2 )信令或媒体接 入控制层控制粒子 (MAC CE )承载; 并可以承载于以下任意一种信息中: RRC连接请求信息、 RRC连接重配置完成信息、 RRC连接重建请求信息、 RRC连接重建完成信息、 连接建立完成信息、 小区更新信息、 随机接入请 求信息、 测量报告、 MAC CE、 专用信令信息。
步骤 202, 网络侧根据 UE上报的反馈信息选择激活或去激活 MBMS 业务的 MBSFN传输方式, 如果选择激活, 则执行步骤 203; 否则, 执行步 骤 206。
步骤 203 , 网络侧选择在 MBSFN区域激活 MBSFN传输方式, 并向相 关的 eNB和 UE发送指示信息。
所谓相关的 eNB , 是指 MBSFN区域中可参与 MBSFN传输的 eNB; 所谓相关的 UE, 是指 MBSFN区域中接收 MBMS业务的 UE。
所述指示信息包括以下内容: MBMS业务的 MBSFN传输将要开始, 相应的 PTP传输停止或继续进行。
步骤 204, BM-SC通过 MBMS网关发送用户面数据到 eNB , 控制面信 令经 MME、 MCE发送到 eNB。
步骤 205 , eNB通过 MBSFN传输 MBMS业务到 UE。
所述 UE是指具有 MBSFN接收能力的 UE。 步骤 206,核心网选择 PTP传输路径,如果选择原路(经 MBMS网关), 则执行步骤 207; 如果选择新路 (经 PDN网关), 则执行步骤 208。
所述传输路径包括: 原路, 即经过 MBMS网关到达 eNB; 新路, 即经 过 PDN网关到达 eNB。
步骤 207, BM-SC通过 MBMS网关发送用户面数据到 eNB , 控制面信 令经 MME、 MCE发送到 eNB , 并转到步骤 209。
所述用户面数据是指 MBMS业务数据。
步骤 208 , BM-SC 将 MBMS 业务通过 PDN 网关发送到业务网关 ( S-GW, Serving Gateway ), S-GW发送到 eNB, 并转到步骤 209。
步骤 209, eNB配置 MBMS业务的 PTP传输无线 7 载资源并通知 UE。 所述 PTP 无线承载是指通过物理下行共享信道(PDSCH , Physical
Downlink Shared Channel )传输的无线资源。
步骤 210, eNB通过 PTP传输 MBMS业务到 UE, 随后流程结束。 下面再结合具体实施例对上述多媒体广播多播业务传输方式的转换方 法进一步详细阐述。
本发明实施例一的应用场景是,网络侧正在以 MBSFN方式传输 MBMS 业务, 根据 UE上报的接收 MBMS 业务状态的反馈信息, 网络侧去激活
MBSFN传输方式, 通过 MBMS网关传输 MBMS业务, eNB配置 PTP传 输的无线承载资源。
结合图 3所示的示意图, 相应的处理具体包括以下步骤:
步骤 301 , 根据 UE接收 MBMS业务状态的反馈信息, 网络侧去激活
MBMS业务的 MBSFN传输方式, 并通知 eNB或 UE。
所述 eNB是指 MBSFN区域中所有的 eNB; 所述 UE是指具有 MBMS 接收能力的 UE, 所述 UE处于 RRC连接模式或 RRC空闲模式。 UE接收
MBMS业务状态包括: 感兴趣接收、 正在接收、 停止接收、 接收承载变更、 小区更新、 小区切换等等。
UE发送的反馈信息的内容包括以下的一种或多种: UE状态、 UE接收
MBMS能力指示、 MBSFN区域指示、 MBMS业务指示、 UE标识;
优选的, MBSFN 区域指示可以为 MBSFN 区域标识或通知指示 ( notification indicator ); MBMS业务指示可以为 MBMS业务标识、 PMCH 标识、 会话标识、 LCID或业务列表索引。
网络侧包括以下一种或多种: BM-SC、 MME、 MCE。
所谓去激活是指 MBMS业务停止使用 MBSFN传输方式,停止 MBSFN 传输后的 MBMS业务可以通过单播 PTP传输, 或者停止传输, 本发明以通 过单播 PTP传输为例进行说明。
所述通知 eNB或 UE,是指通过信令告知 eNB或 UE以下内容: MBMS 业务的 MBSFN传输将要停止, 该业务的 PTP传输将要开始。
步骤 302, BM-SC将用户面数据经过 MBMS网关传输到 eNB。
所述 BM-SC是指与去激活 MBSFN区域相关联的 BM-SC;所述用户面 数据是指具体的 MBMS业务数据; 所述经过 MBMS网关是指通过 BM-SC 和 MBMS网关之间的 SGi-mb接口; 所述传输到 eNB是指通过 MBMS网 关和 eNB之间的 Ml接口传输数据;所述 eNB是指 MBSFN区域内的 eNB。
步骤 303 , BM-SC将控制面信令经过 MBMS-GW传输到 MME, MME 经 M3接口传输信令到 MCE, MCE经 M2接口传输信令到 eNB。
所述控制面信令主要包括: MBMS业务的 MBSFN传输停止指示信息,
MBMS业务相应的 MBSFN承载资源释放消息, MBMS业务的单播承载资 源请求建立消息等。
所述 eNB是指 MBSFN区域内参与 MBSFN传输的所有 eNB。
步骤 304, eNB配置 MBMS业务的 PTP传输无线 7 载资源并通知 UE。 所述 PTP是指单播传输; 所述无线承载资源是指 PDSCH上的资源, 用于传输 MBMS业务; 所述 eNB通知 UE包括: eNB通知 UE单播资源配 置, eNB通知 RRC空闲态的 UE进入 RRC连接态; 上述 UE是指 eNB中 接收 MBMS业务的 UE。
步骤 305 , eNB通过 PTP向 UE发送 MBMS业务。
本发明实施例二的应用场景是,网络侧正在以 MBSFN方式传输 MBMS 业务, 根据 UE上报的接收 MBMS 业务状态的反馈信息, 网络侧去激活 MBSFN传输方式, 通过 PDN网关传输 MBMS业务, eNB配置 PTP传输 的无线承载资源。
结合图 4所示的示意图, 相应的处理具体包括以下步骤:
步骤 401 , 根据 UE接收 MBMS业务状态的反馈信息, 网络侧去激活 MBMS业务的 MBSFN传输方式, 并通知 eNB或 UE。
所述 eNB是指 MBSFN区域中所有的 eNB; 所述 UE是指具有 MBMS 接收能力的 UE, 所述 UE处于 RRC连接模式或 RRC空闲模式。 UE接收 MBMS业务状态包括: 感兴趣接收、 正在接收、 停止接收、 接收承载变更、 小区更新、 小区切换等等。
UE发送的反馈信息的内容包括以下的一种或多种: UE状态、 UE接收 MBMS能力指示、 MBSFN区域指示、 MBMS业务指示、 UE标识;
优选的, MBSFN 区域指示可以为 MBSFN 区域标识或通知指示 ( notification indicator ); MBMS业务指示可以为 MBMS业务标识、 PMCH 标识、 会话标识、 LCID或业务列表索引;
网络侧包括以下一种或多种: BM-SC、 MME、 MCE。
所谓去激活是指, MBMS业务停止使用 MBSFN传输方式,停止 MBSFN 传输后的 MBMS业务可以通过单播 PTP传输, 或者停止传输, 本发明以通 过单播 PTP传输为例进行说明。
所述通知 eNB或 UE,是指通过信令告知 eNB或 UE以下内容: MBMS 业务的 MBSFN传输将要停止, 该业务的 PTP传输将要开始。
步骤 402, BM-SC将用户面数据经过 PDN网关传输到 S-GW, S-GW 将用户数据经 S1-U接口发送到 eNB。
所述 BM-SC是指与去激活 MBSFN区域相关联的 BM-SC;所述用户面 数据是指具体的 MBMS业务数据; 所述经过 PDN网关是指通过 BM-SC和 PDN网关之间的 SGi接口;所述传输到 S-GW是指通过 PDN网关和 S-GW 之间的 S5/S8接口传输; 所述 eNB是指 MBSFN区域内的 eNB。
步骤 403 , BM-SC将控制面信令经过 PDN网关传输到 S-GW, S-GW 将信令经 S11传输到 MME, MME经 S1-MME接口传输信令到 eNB。
所述控制面信令主要包括: MBMS业务的 MBSFN传输停止指示信息, MBMS业务相应的 MBSFN承载资源释放消息, MBMS业务的单播承载资 源请求建立消息等; 所述 eNB是指 MBSFN区域内参与 MBSFN传输的所 有 eNB。
步骤 404, eNB配置 MBMS业务的 PTP传输无线承载资源并通知 UE。 所述 PTP是指单播传输; 所述无线承载资源是指 PDSCH上的资源, 用于传输 MBMS业务; 所述 eNB通知 UE包括: eNB通知 UE单播资源配 置, eNB通知 RRC空闲态的 UE进入 RRC连接态; 上述 UE是指 eNB中 接收 MBMS业务的 UE。
步骤 405 , eNB通过 PTP向 UE发送 MBMS业务。
本发明实施例三的应用场景是,网络侧正在以 PTP方式传输 MBMS业 务,根据 UE上报的接收 MBMS业务状态的反馈信息, 网络侧激活 MBSFN 传输方式, 通过 MBMS网关传输 MBMS业务, MCE配置 PTM传输的无 线承载资源。
结合图 3所示的示意图, 相应的处理具体包括以下步骤:
步骤 501 , 根据 UE接收 MBMS 业务状态的反馈信息, 网络侧激活 MBMS业务的 MBSFN传输方式, 并通知 eNB或 UE。
所述 eNB是指 MBSFN区域中所有的 eNB; 所述 UE是指正在以 PTP 方式接收 MBMS业务的 UE,所述 UE处于 RRC连接模式。 UE接收 MBMS 业务状态包括: 感兴趣接收、 正在接收、 停止接收、 接收承载变更、 小区 更新、 小区切换等等。
UE发送的反馈信息的内容包括以下的一种或多种: UE状态、 UE接收 MBMS能力指示、 MBSFN区域指示、 MBMS业务指示、 UE标识;
优选的, MBSFN 区域指示可以为 MBSFN 区域标识或通知指示 ( notification indicator ); MBMS业务指示可以为 MBMS业务标识、 PMCH 标识、 会话标识、 LCID或业务列表索引;
网络侧包括以下一种或多种: BM-SC、 MME、 MCE。
所述激活是指, MBMS业务开始使用 MBSFN传输方式。
所述通知 eNB或 UE,是指通过信令告知 eNB或 UE以下内容: MBMS 业务的 MBSFN传输将要开始, 相应的 PTP传输停止或继续进行。 所述业 务的 MBSFN传输开始之后, 相应的 PTP传输可以停止也可以继续进行, 例如: 原有通过 PTP接收 MBMS业务且不具备 MBSFN接收能力的 UE可 以通过 PTP继续接收该业务, 如果所有 UE都具备 MBSFN接收能力 , 则 停止 PTP传输。
步骤 502, BM-SC将用户面数据经过 MBMS网关传输到 eNB。
所述 BM-SC是指与去激活 MBSFN区域相关联的 BM-SC;所述用户面 数据是指具体的 MBMS业务数据; 所述经过 MBMS网关是指通过 BM-SC 和 MBMS网关之间的 SGi-mb接口; 所述传输到 eNB是指通过 MBMS网 关和 eNB之间的 Ml接口传输数据; 所述 eNB是指 MBSFN区域内的参与 业务传输的 eNB。
步骤 503 , BM-SC将控制面信令经过 MBMS网关传输到 MME, MME 经 M3接口传输信令到 MCE, MCE经 M2接口传输信令到 eNB。
所述控制面信令主要包括: MBMS业务的 MBSFN传输开始指示信息,
MBMS业务相应的 PTP承载资源释放消息, MBMS业务的 MBSFN承载资 源请求建立消息等。
所述 MCE是指 MBSFN区域内参与 MBSFN传输的 MCE; 所述 eNB 是指 MBSFN区域内参与 MBSFN传输的所有 eNB。
步骤 504, MCE配置 MBMS 业务的 PTM传输无线 7 载资源并指示 cNB。
所述 MCE是指 MBSFN区域内参与 MBSFN传输的 MCE; 所述 MCE 指示 eNB是指通过 M2接口发送信令指示, 所述指示包括 MBSFN无线传 输资源的配置信息和调度信息。
步骤 505 , eNB通过 PTM向 UE发送 MBMS业务。
对应上述多媒体广播多播业务传输方式的转换方法, 本发明还提供了 一种多媒体广播多播业务传输方式的转换系统, 如图 5 所示, 包括: 用户 设备模块 10、 系统设备模块 20、 传输模块 30、 核心网 40和接入网 50。
其中, 用户设备模块 10, 用于向网络侧上报接收 MBMS业务状态的反 馈信息, 并接收 MBMS 业务。 系统设备模块 20, 用于根据用户设备模块 10的反馈信息, 选择激活或去激活 MBMS业务的 MBSFN传输方式。 传输 模块 30, 用于在用户设备模块 10和系统设备模块 20之间传输上行的反馈 信息 (或者还传输反馈请求信息)、 下行配置信息和 MBMS业务。 核心网 40,用于在系统设备模块 20激活或去激活 MBMS业务的 MBSFN传输方式 之后, 确定该 MBMS 业务的传输路径。 接入网 50, 用于在系统设备模块 20激活或去激活 MBMS业务的 MBSFN传输方式之后, 配置该 MBMS业 务相应的无线承载资源。
综上所述, 本发明在激活或去激活 MBMS业务的 MBSFN传输方式之 后, 确定 MBMS业务的传输路径和相应的无线资源承载, 从而保证了业务 连续性, 提高了用户体验。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围。 本发明还可有其他多种实施例, 在不背离本发明精神及其实质的 形, 但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。

Claims

权利要求书
1、 一种多媒体广播多播业务(MBMS )传输方式的转换方法, 其特征 在于, 该方法包括:
网络侧根据用户设备 ( UE )上报的接收 MBMS业务状态的反馈信息激 活或去激活多媒体广播单频网络(MBSFN )传输方式之后, 核心网确定所 述 MBMS业务的传输路径 , 接入网配置所述 MBMS业务相应的无线承载 资源。
2、 根据权利要求 1所述多媒体广播多播业务传输方式的转换方法, 其 特征在于, 所述核心网包括以下网元中的至少一种: 广播多播业务中心
( BM-SC )、 移动管理实体(MME )、 MBMS网关、 分组数据网 ( PDN ) 网 关;
所述接入网包括以下网元中的至少一种: 多播协调实体( MCE )、 演进 的节点 B ( eNB )。
3、 根据权利要求 1所述多媒体广播多播业务传输方式的转换方法, 其 特征在于, 所述传输路径为从 BM-SC到 UE之间的路径, 且传输路径经过 MBMS网关或 PDN网关。
4、 根据权利要求 1、 2或 3所述多媒体广播多播业务传输方式的转换 方法, 其特征在于, 所述反馈信息周期性发送, 或通过事件触发, 或根据 网络侧的指示发送。
5、 根据权利要求 4所述多媒体广播多播业务传输方式的转换方法, 其 特征在于, 所述事件包括以下至少一种:
会话开始、 会话结束、 承载变更指示、 小区更新、 小区切换。
6、 根据权利要求 4所述多媒体广播多播业务传输方式的转换方法, 其 特征在于, 所述网络侧的指示通过无线资源控制 (RRC )信令承载, 所述 RRC信令通过广播控制信道(BCCH )或多播控制信道(MCCH )发送。
7、 根据权利要求 1、 2或 3所述多媒体广播多播业务传输方式的转换 方法, 其特征在于, 所述反馈信息通过 RRC信令、 层 1/层 2 ( L1/L2 )信令 或媒体接入控制层控制粒子 (MAC CE )承载。
8、 根据权利要求 1、 2或 3所述多媒体广播多播业务传输方式的转换 方法, 其特征在于,
所述反馈信息的内容包括以下至少一种: UE状态、 UE接收 MBMS能 力指示、 MBSFN区域指示、 MBMS业务指示、 UE标识;
所述 UE状态包括以下至少一种: 感兴趣接收、 正在接收、 停止接收、 接收承载变更、 小区更新、 小区切换。
9、 根据权利要求 1、 2或 3所述多媒体广播多播业务传输方式的转换 方法, 其特征在于, 所述 UE上报的反馈信息承载于以下任意一种信息中:
RRC连接请求信息、 RRC连接重配置完成信息、 RRC连接重建请求信 息、 RRC连接重建完成信息、 连接建立完成信息、 小区更新信息、 随机接 入请求信息、 测量报告中、 MAC CE、 专用信令信息。
10、 根据权利要求 1、 2或 3所述多媒体广播多播业务传输方式的转换 方法, 其特征在于, 该方法进一步包括: 网络侧通知相关 eNB或 UE以下 内容中的至少一种: MBSFN传输方式激活或去激活、 MBMS业务的传输路 径、 无线承载资源配置。
11、 根据权利要求 10所述多媒体广播多播业务传输方式的转换方法, 其特征在于, 所述网络侧包括以下一种或几种: BM-SC、 MME、 MCE。
12、 一种多媒体广播多播业务 MBMS传输方式的转换系统, 其特征在 于, 该系统包括: 用户设备模块、 系统设备模块、 传输模块、 核心网和接 入网, 其中,
所述用户设备模块, 用于向网络侧上报接收 MBMS业务状态的反馈信 息, 并接收 MBMS业务; 所述系统设备模块, 用于根据所述用户设备模块的反馈信息, 选择激 活或去激活 MBMS业务的 MBSFN传输方式;
所述传输模块, 用于在所述用户设备模块和系统设备模块之间传输所 述反馈信息、 下行配置信息和 MBMS业务;
所述核心网, 用于在所述系统设备模块激活或去激活 MBMS 业务的 MBSFN传输方式之后, 确定所述 MBMS业务的传输路径;
所述接入网, 用于在所述系统设备模块激活或去激活 MBMS 业务的 MBSFN传输方式之后 , 配置所述 MBMS业务相应的无线承载资源。
13、 根据权利要求 12所述多媒体广播多播业务传输方式的转换系统, 其特征在于, 所述核心网包括以下网元中的至少一种: 广播多播业务中心
( BM-SC )、 移动管理实体(MME )、 MBMS网关、 分组数据网 ( PDN ) 网 关;
接入网包括以下网元中的至少一种: 多播协调实体(MCE )、 演进的节 点 B ( eNB )。
14、 根据权利要求 12所述多媒体广播多播业务传输方式的转换系统, 其特征在于, 所述传输路径为从 BM-SC到 UE之间的路径, 且传输路径经 过 MBMS网关或 PDN网关。
15、 根据权利要求 12、 13或 14所述多媒体广播多播业务传输方式的 转换系统, 其特征在于, 所述反馈信息周期性发送, 或通过事件触发, 或 根据网络侧的指示发送。
16、 根据权利要求 15所述多媒体广播多播业务传输方式的转换系统, 其特征在于, 所述事件包括以下至少一种:
会话开始、 会话结束、 承载变更指示、 小区更新、 小区切换。
17、 根据权利要求 15所述多媒体广播多播业务传输方式的转换系统, 其特征在于, 所述网络侧的指示通过无线资源控制 (RRC )信令承载, 所 述 RRC信令通过广播控制信道(BCCH )或多播控制信道(MCCH )发送。
18、 根据权利要求 12、 13或 14所述多媒体广播多播业务传输方式的 转换系统, 其特征在于, 反馈信息通过 RRC信令、 L1/L2信令或媒体接入 控制层控制粒子 (MAC CE )承载。
19、 根据权利要求 12、 13或 14所述多媒体广播多播业务传输方式的 转换系统, 其特征在于,
所述反馈信息的内容包括以下至少一种: UE状态、 UE接收 MBMS能 力指示、 MBSFN区域指示、 MBMS业务指示、 UE标识;
所述 UE状态包括以下至少一种: 感兴趣接收、 正在接收、 停止接收、 接收承载变更、 小区更新、 小区切换。
20、 根据权利要求 12、 13或 14所述多媒体广播多播业务传输方式的 转换系统,其特征在于,所述 UE上报的反馈信息承载于以下任意一种信息 中:
RRC连接请求信息、 RRC连接重配置完成信息、 RRC连接重建请求信 息、 RRC连接重建完成信息、 连接建立完成信息、 小区更新信息、 随机接 入请求信息、 测量报告中、 MAC CE、 专用信令信息。
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