WO2008098508A1 - Procédé et système pour activer une diffusion multimédia et un service multidiffusion - Google Patents

Procédé et système pour activer une diffusion multimédia et un service multidiffusion Download PDF

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Publication number
WO2008098508A1
WO2008098508A1 PCT/CN2008/070271 CN2008070271W WO2008098508A1 WO 2008098508 A1 WO2008098508 A1 WO 2008098508A1 CN 2008070271 W CN2008070271 W CN 2008070271W WO 2008098508 A1 WO2008098508 A1 WO 2008098508A1
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WIPO (PCT)
Prior art keywords
base station
evolved base
target
mbms service
message
Prior art date
Application number
PCT/CN2008/070271
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English (en)
Chinese (zh)
Inventor
Yong Qiu
Bo Lin
Boya Lv
Original Assignee
Huawei Technologies Co., Ltd.
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.)
Filing date
Publication date
Priority claimed from CN2007101356723A external-priority patent/CN101242573B/zh
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008098508A1 publication Critical patent/WO2008098508A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • 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
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the present invention relates to the field of communications, and in particular to a method and system for activating multimedia broadcast and multicast service services.
  • LTE Long Term Evolution
  • MBMS provides MBMS services using the UMTS network.
  • MBMS refers to broadcasting or multicasting multimedia data to a mobile terminal by sharing a transmission link.
  • MBMS is divided into two working modes: broadcast and multicast.
  • the broadcast mode refers to that the multimedia data is sent from one service source to all user equipments in the broadcast service area (User).
  • the UE in this mode can receive broadcast data without registration. This broadcast mode can effectively save radio resources, but cannot guarantee the integrity of the data received by the UE.
  • the multicast mode is very similar to the broadcast mode, but the UE that can receive multicast data in the multicast mode is limited to the UE that has registered the service. When there are too few UEs receiving multicast data in the cell, the peer point can be further selected (Point To
  • the radio bearer of Point, PTP transmits multicast data to reduce interference to other wireless links.
  • Network, CN Controls the continuity of the UE in cell reselection or handover ⁇ MBMS service.
  • a method for activating the MBMS service in the target cell under the UMTS system will be briefly described by taking a handover as an example. See the method flow diagram shown in Figure 1.
  • Step 101 Switching occurs, source radio resource controller (Source Radio Access
  • SRNC SRNC performs a handover decision and sends a handover request message (Relocation Required) with MBMS service information to the CN.
  • Step 102 CN to the target radio resource controller (Target Radio Access
  • TRNC Send with Linyi Mobile Group Identifier and Point-to-Point Radio Access Bearer Identifier (PTP) Radio Access Bearer ID) handover request message.
  • PTP Point-to-Point Radio Access Bearer Identifier
  • Step 103 TRNC creates an MBMS User Equipment Context (MBMS UE
  • MBMS Service creates the corresponding MBMS service context based on the identity of the MBMS service (MBMS Service)
  • Step 104 TRNC sends MBMS registration request message to CN (MBMS Registration
  • Step 105 After receiving the MBMS registration request message, the CN re-establishes the broadcast multicast service ( broadcast multicast service)
  • BM-SC MBMS Center
  • TRNC MBMS Bearer
  • the newly created MBMS transport context state on each node is also on standby.
  • Step 106 The BM-SC initiates an MBMS session (MBMS Session)
  • Iu bears and establishes a point-to-point radio bearer between the TRNC and the UE (PTP
  • the transmission context state is Active (Active) and the UE begins to receive MBMS data from the TRNC.
  • TRNC's MBMS service requires the participation of CN, and CN needs to trigger the TRNC registration process through the MBMS user equipment link process.
  • the MBMS Session is re-initiated by the upstream node after the Register
  • the Start process can be established.
  • the current communication system is shown in Figure 2.
  • MBMS has also evolved into an enhanced multimedia broadcast and multicast service (Enhanced-MBMS, E-MBMS).
  • E-MBMS enhanced multimedia broadcast and multicast service
  • the architecture of E-MBMS has undergone great changes on the basis of MBMS.
  • One of them is the introduction of single frequency network (Single frequency).
  • SFN Single frequency network area
  • the embodiment of the present invention provides a method and system for activating a multimedia broadcast and multicast service service, which is used to implement an MBMS service for activating an evolved base station.
  • An embodiment of the present invention provides a method for activating a multimedia broadcast and multicast service service, including the following steps:
  • the target evolved base station After the target evolved base station does not transmit the MBMS service, send a first message for adding the target evolved base station to the content distribution tree, and send the wireless resource allocation information to the target evolved base station by the multicast coordination entity MCE.
  • the embodiment of the present invention further provides a user equipment, including:
  • a measuring unit configured to measure a neighboring cell, and determine a neighboring evolved base station that meets the measurement condition as a target evolved base station;
  • a receiving unit configured to receive MBMS service information of the target evolved base station from a home evolved base station
  • a determining unit configured to determine, according to the MBMS service information, whether the target evolved base station is transmitting an MBMS service
  • the sending unit is configured to send a second message for activating the MBMS service, where the judgment result is no, the second message includes an identifier of the target evolved base station and an identifier used to mark the MBMS service.
  • An embodiment of the present invention further provides an evolved base station, including:
  • a determining unit configured to perform a handover decision, and determine an evolved base station that meets the decision condition as a target evolved base station;
  • a receiving unit configured to receive MBMS service information of the target evolved base station from the target evolved base station or an MCE;
  • a determining unit configured to determine, according to the MBMS service information, whether the target evolved base station is transmitting an MBMS service;
  • a sending unit configured to send, to the target evolved base station, a handover request message including an identifier for marking the MB MS service, or send a second message for activating the MBMS service to the MCE, or And transmitting a first message for adding the target evolved base station to the content distribution tree, where the second message includes an identifier of the target evolved base station and an identifier used for marking the MBMS service.
  • the embodiment of the present invention further provides a multicast coordination entity, including:
  • a receiving unit configured to receive a measurement result sent by the user equipment UE
  • a storage unit configured to store single-frequency network area location status information and radio resource allocation information of the evolved base station
  • a determining unit configured to determine, according to the measurement result, an evolved base station that meets the measurement condition and is adjacent to the evolved base station to which the UE belongs, as the target evolved base station, and according to the single-frequency network area state information corresponding to the target evolved base station Whether it is inside the single frequency network area, that is, whether it is transmitting the MBMS service;
  • the sending unit is configured to: after the determination result is no, send the radio resource allocation information to the target evolved base station, or further send the first message for adding the target evolved base station to the content distribution tree.
  • the embodiment of the invention further provides a communication system, including:
  • a user equipment configured to receive MBMS service data, perform cell reselection or handover; perform cell reselection, measure neighboring cells, and determine an evolved base station that meets the measurement condition as a target evolved base station, and according to the The MBMS service information of the target evolved base station obtained by the attributable evolved base station determines whether the target evolved base station is transmitting the MBMS service, and transmits the second message for activating the MB MS service without transmitting the MBMS service, the second message including the target The identifier of the evolved base station and the identifier used to mark the MBM S service;
  • an evolved base station configured to transmit MBMS service data to the user equipment, and forward the second message to a multicast coordination entity MCE;
  • the MCE is configured to send, according to the received second message, radio resource allocation information to the target evolved base station, and send a first message for adding the target evolved base station to the content distribution tree.
  • the embodiment of the invention further provides a communication system, including: [41] a user equipment, configured to receive MBMS service data, and perform handover;
  • an evolved base station configured to transmit MBMS service data to the user equipment; perform handover decision in the handover process, determine the evolved base station that meets the handover condition as the target evolved base station, and according to the evolved base station or the MCE from the target Obtaining the MBMS service information of the target evolved base station to determine whether it is transmitting the MBMS service, and transmitting the second message for activating the MBMS service to the multicast coordination entity MCE without transmitting the MBMS service, the second message including the target evolution An identifier of the base station and an identifier for marking the M BMS service; or, after the MBMS service is not transmitted, transmitting a handover request message including an identifier for marking the MBMS service, after the target evolved base station receives the handover request message, Sending, to the MC E, a second message for activating an MBMS service, where the second message includes an identifier for marking the MBMS service;
  • the MCE configured to send, according to the received second message, radio resource allocation information to the target evolved base station
  • the target evolved base station sends a first message for adding the target evolved base station to the content distribution tree after receiving the radio resource allocation information.
  • An embodiment of the present invention further provides a communication system, including:
  • a user equipment configured to receive MBMS service data, and send a measurement result obtained by measuring a neighboring cell
  • an evolved base station configured to transmit MBMS service data to the user equipment, and send the measurement result to a multicast coordination entity MCE;
  • the MCE is configured to determine, according to the measurement result sent by the user equipment, the evolved base station that meets the measurement condition as the target evolved base station, and determine, according to the MBMS service information of the target evolved base station that is locally stored, whether the MBMS service is being transmitted. And transmitting the radio resource allocation information to the target evolved base station without transmitting the MBMS service, and transmitting the first message for adding the target evolved base station to the content distribution tree.
  • the embodiment of the present invention implements a process in which the UE initiates the activation of the MBMS service before completing the cell reselection and handover, and ensures the continuity of the MBMS service after the UE performs cell reselection or handover.
  • FIG. 1 is a flow chart of a method for activating an MBMS service in the prior art
  • 2 is a structural diagram of a communication system in the prior art
  • FIG. 3 is a structural diagram of a communication system according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a communication system in an LTE system according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a communication system between an MCE and an eNB in an LTE system according to an embodiment of the present invention
  • FIG. 6 is a structural diagram of a UE in an embodiment of the present invention.
  • FIG. 7A is a structural diagram of an eNB according to an embodiment of the present invention.
  • FIG. 7B is a structural diagram of an MCE according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of a main method for activating an MBMS service according to an embodiment of the present invention.
  • FIG. 9 is a flowchart of a specific method for activating an MBMS service according to an embodiment of the present invention.
  • FIG. 10 is a flowchart of a fourth specific method for activating an MBMS service according to an embodiment of the present invention.
  • FIG. 11 is a flowchart of a specific method for activating an MBMS service according to an embodiment of the present invention.
  • FIG. 12 is a flowchart of a sixth specific method for activating an MBMS service according to an embodiment of the present invention.
  • FIG. 13 is a flowchart of a seventh specific method for activating an MBMS service according to an embodiment of the present invention.
  • 15 is a flowchart of a specific method for activating an MBMS service according to an embodiment of the present invention.
  • the eNB, the eNB, or the Multicast/Multicast Coordination Entity specifies the eNB based on the measurement result obtained after the measurement, and finds that the MBMS service is not activated according to the MBM S service information of the specified eNB. Request to activate the MBMS service.
  • the designated eNB is referred to as a target eNB, and the eNB to which the UE belongs is referred to as a source eNB.
  • the embodiment of the present invention is described by taking an LTE system as an example.
  • the embodiment of the present invention provides a method for activating an MBMS service of a specified eNB.
  • the first method is that the UE in the standby state performs cell measurement and finds that the target eNB that meets the measurement condition does not transmit the MBMS service, and activates the target.
  • the method of the MBMS service of the eNB For example, if the UE in the standby state performs cell reselection and finds that the target eNB does not transmit the MBMS service, the MBMS of the target eNB is activated.
  • Business approach is that the UE in the standby state performs cell measurement and finds that the target eNB that meets the measurement condition does not transmit the MBMS service.
  • the third method is a method in which the source eNB activates the MBMS service of the target eNB when the source eNB finds that the target eNB does not transmit the MBMS service after the UE in the active state performs the handover.
  • the source eNB finds that the target eNB does not transmit the MB MS service, and the target eNB requests a method of activating the MBMS service.
  • the communication system in the embodiment of the present invention includes an MBMS user plane entity (UPE for
  • mUPE is a logical entity, for example in UPE.
  • the header compression of the MBMS, the distribution of the MBMS content data, the target eNB is added to the content distribution tree, and the data plane bearer with the target eNB is established, and is the end point of the synchronization protocol.
  • MCE is a logical module, which can be a separate node. See Figure 4, or in an existing network entity, an existing network entity such as a mobile management entity (Mobile Management).
  • Mobile Management Mobile Management
  • an MCE is taken as an independent node as an example for description.
  • the MCE is used to control and allocate radio resources of the SFN area, and send the SFN to the target eNB.
  • Radio resource allocation information including subcarrier information and frequency band information
  • air interface configuration information including encoding and modulation methods
  • MCE has a service identifier, SFN
  • the area identifier The area identifier, the radio resource allocation information, the air interface configuration information, the identifier of the eNB, the corresponding SFN area information, and the neighboring eNB identifier.
  • the UE receives the MBMS service data, is in the standby state, performs cell reselection, and is in an active state, and performs handover. After the cell reselection, the UE performs the cell reselection measurement, and selects the eNB corresponding to the best cell as the target eNB according to the measurement result; obtains the information about the MBMS service of the target eNB (including the service identifier, etc.) by the source eNB, and determines the target. Whether the eNB is transmitting the MBMS service, and if so, reselecting to the cell under the target eNB, otherwise requesting to activate the MBMS service of the target eNB.
  • the eNB transmits MBMS service data to the UE, and forwards the message sent by the UE; and the neighboring eNB through the X2 interface. Performing an interaction, obtaining information about the MBMS service of the neighboring eNB, and determining, according to the information, whether the neighboring eNB is transmitting the MBMS service; performing a handover decision, using the eNB that meets the handover condition as the target eNB, and when the target eNB has activated the MBMS service, The UE is handed over to the target eNB, otherwise the MCE is directly or indirectly requested to activate the MBMS service of the target eNB, and then the UE is handed over to the target eNB. For the target eNB, an extension request message is sent to the MCE according to the service identifier, requesting to join. SFN
  • the UE includes a receiving unit 601, a measuring unit 602, a determining unit 603, a storage unit 604, and a sending unit 605.
  • the measuring unit 602 performs measurement on the neighboring cell, and determines the eNB that meets the measurement condition as the target e NB.
  • the receiving unit 601 receives the MBMS service information of the target eNB from the source eNB.
  • the storage unit 604 stores the received MBMS service information of the target eNB, the measurement result obtained by the measurement unit 602, and the like.
  • Each of the storage units in the embodiment of the present invention may be a floppy disk, a hard disk, a magnetic tape, or the like.
  • the determining unit 603 determines, based on the MBMS service information, whether the target eNB is transmitting the MBMS service.
  • the transmitting unit 605 sends the measurement result, or sends an extension request message (SFN Area Expand) if the determination result is no.
  • SFN Area Expand extension request message
  • the extension request message includes an identifier of the target eNB and a service identifier.
  • the eNB includes a receiving unit 701, a determining unit 702, and a determining unit 70.
  • the determining unit 702 performs a handover decision, and determines the eNB that meets the decision condition as the target evolved base station.
  • the receiving unit 701 receives the MBMS service information of the target eNB from the target eNB or the MCE.
  • the storage unit 704 stores the received MBMS service information of the target eNB.
  • the judging unit 703 judges whether the target eNB is transmitting the MBMS service based on the MBMS service information.
  • the transmitting unit 705 transmits the service identifier and the SFN to the target eNB after the determination result is NO.
  • the handover request message identified by the area, or the extension request message is sent to the MCE, or the join request message is further sent to the mUPE, where the extension request message includes the identifier of the target eNB and the service identifier.
  • the MCE includes a receiving unit 710, a determining unit 711, a storage unit 712, and a sending unit 713.
  • the receiving unit 710 receives the measurement result sent by the UE, and the extension request message sent by the source eNB or the target eNB, and the like.
  • the storage unit 712 stores SFN area location status information, service identifier, SFN area identifier, air interface configuration information, radio resource allocation information, and the like of the eNB.
  • the determining unit 711 determines the evolved base station that meets the measurement condition as the target evolved base station according to the measurement result.
  • the sending unit 713 sends the radio resource allocation information to the target evolved base station to perform corresponding configuration, or further sends a join request message to the mUPE.
  • the main method for activating the MBMS service in the embodiment of the present invention is as follows:
  • Step 801 Determine the target eNB.
  • the UE in the standby state determines the target eNB based on the measurement result.
  • the source eNB determines the target eNB based on the result of the handover decision.
  • the MCE receives the measurement result sent by the UE in the standby state to determine the target eNB.
  • Step 802 Obtain the MBMS service information of the target eNB.
  • Step 803 Determine, according to the MBMS service information of the target eNB, whether the target eNB is transmitting the MBMS service, and send the join request message to the mUPE after transmitting the MBMS service, requesting to join the target eNB to the content distribution tree (or the multicast group). And transmitting, by the MCE, radio resource allocation information to the target eNB.
  • the UE in the standby state performs cell measurement and finds that the target eNB that meets the measurement condition does not transmit the MBMS service, and the specific method for activating the MBMS service of the target eNB is as follows:
  • Step 901 The UE is receiving the MBMS service, performs measurement on the neighboring cell, and sends the measurement result to the MCE through the source eNB.
  • Step 902 The MCE uses the eNB that meets the measurement condition as the target eNB according to the measurement result, where the eNB is the neighboring eNB of the home eNB of the UE.
  • the measurement condition is that the CPICH transmit power of the neighboring cell is greater than the CPICH transmit power of the local cell, or the CPICH transmit power of the neighboring cell is greater than the CPICH transmit power of the local cell, and the difference is greater than a preset threshold. Or, the CPICH transmit power of the neighboring cell is greater than a preset threshold.
  • the threshold value may be adjusted to determine whether there is an eNB that meets the adjusted measurement condition, and the eNB that meets the measurement condition is used as the target eNB, and the MBMS service of the target eNB is activated. Before the UE performs cell reselection, the MBMS service of the target eNB that the UE may reselect is activated.
  • Step 903 The MCE is based on the SFN of the locally stored eNB.
  • Area location status information knows whether the target eNB is in SFN
  • Step 904 The MCE sends an extended indication message to the target eNB, where the message includes radio resource allocation information.
  • One or more cells within the coverage of B join SFN areao
  • Step 905 The target eNB performs corresponding configuration according to the radio resource allocation information, and returns an extension indication response message to the MCE.
  • the MCE may further determine whether the eNB that meets the measurement condition meets the decision condition, and the eNB that meets the decision condition is used as the target eNB.
  • the decision conditions include: Whether the cell covered by it exceeds the maximum SFN
  • the load is less than the preset threshold, whether it belongs to the eNB that is allowed to join the SFN area in the local configuration information, and does not belong to the eNB that is prohibited from joining the SFN area in the local configuration information.
  • the MCE may only send an extended indication message to the target eNB, by the target eNB in step 9.
  • a join request message is sent to the mUPE, requesting to join the content distribution tree.
  • the method achieves that the signal received by the UE is poor, and the MBMS service of the neighboring eNB is activated, so that the UE receives the enhanced signal and improves the receiving quality of the MBMS service.
  • the UE in the standby state performs cell reselection and finds that the target eNB does not transmit the MBMS service, and the specific method for activating the MBMS service of the target eNB is as follows:
  • Step 1001 The UE in the standby state performs cell reselection, determines whether there is an eNB that meets the cell reselection measurement condition in the neighboring eNB, and selects the eNB with the best measurement result from the eNB that meets the cell reselection measurement condition.
  • Target eNB For example, the transmit power values of the common pilot signals of the neighboring cells are compared, and the cell with the highest value is the best cell.
  • Step 1002 The UE obtains MBMS service information of the target eNB from the source eNB, and determines, according to the MBMS service information, whether the target eNB is transmitting the MBMS service, and if yes, proceeds to step 1009, otherwise proceeds to step 1003.
  • Step 1003 The UE sends an extension request message to the source eNB, where the message includes the identifier of the target eNB, and the SFN. Area identification and service identification.
  • Step 1004 The source eNB forwards the extension request message to the MCE.
  • Step 1005 The MCE sends an extended indication message to the target eNB according to the identifier and the service identifier of the target eNB, where the message includes the radio resource allocation information, and requests the mUPE to join the content distribution tree, activate the MBMS service of the target eNB, and One or more cells corresponding to the target eNB join the SFN area.
  • Step 1006 The target eNB performs corresponding configuration according to the radio resource allocation information, and returns an extension indication response message to the MCE.
  • Step 1007 The MCE sends an extended response message to the source eNB.
  • Step 1008 The source eNB forwards the extended response message to the UE.
  • Step 1009 The UE reselects the cell to the target eNB.
  • the MCE may instruct the source eNB to request the mUPE to join the target eNB to the content distribution tree, or send the join request message to the mUPE after receiving the extended indication message by the target eNB in step 1006, requesting to join the content distribution tree.
  • Step 1101 The active UE has switched.
  • Step 1102 The source eNB performs a handover decision, and selects a neighboring eNB that meets the handover condition as the target eNB.
  • Step 1103 The source eNB obtains the MBMS service information of the target eNB through the X2 interface, or obtains the MBMS service information of the target eNB from the MCE, and determines, according to the information, whether the target eNB is transmitting the MBMS service required by the UE, if the target eNB If the MBMS service has been activated, proceed to step 1109, otherwise proceed to step 1104.
  • Step 1104 The source eNB sends an extension request message to the MCE, where the message includes the identifier of the target eNB, the monthly service identifier, and the SFN area identifier.
  • Step 1105 The MCE sends an extended indication message to the target eNB, where the message includes radio resource allocation information.
  • Step 1106 The target eNB performs corresponding configuration according to the radio resource allocation information, and returns the extension to the MCE. Exhibition indication response message.
  • Step 1107 The MCE sends an extended response message to the source eNB.
  • Step 1108 The source eNB sends a handover request message to the target eNB, and continues the handover procedure.
  • Step 1109 The UE switches to the cell of the target eNB.
  • the MCE may be further adjacent to the target eNB and in the SFN.
  • the eNB outside the area sends an extension indication message and adds it to the SFN area.
  • step 1104 and step 1108 can be performed simultaneously.
  • Step 1201 The active UE has switched.
  • Step 1202 The source eNB performs a handover decision, and selects a neighboring eNB that meets the handover condition as the target eNB.
  • Step 1203 The source eNB obtains the MBMS service information of the target eNB through the X2 interface, and determines, according to the information, whether the target eNB is transmitting the MBMS service required by the UE. If the target eNB has activated the MBMS service, proceed to step 1211, otherwise continue. Step 1204.
  • Step 1204 The source eNB sends a handover request message to the target eNB, where the message includes an identifier of the MBMS service required by the UE and an SFN area identifier.
  • Step 1205 The target eNB sends an extension request message to the MCE, requesting to join the SFN.
  • the extension request message includes a service identifier and an SFN area identifier.
  • Step 1206 The MCE sends an extended indication message to the target eNB, where the message includes radio resource allocation information.
  • Step 1207 The target eNB performs corresponding configuration according to the radio resource allocation information, and returns an extended indication response message to the MCE.
  • Step 1208 The target eNB sends a join request message to the mUPE to request to join the content distribution tree.
  • the target eNB is requested to join the content distribution tree by sending a join request message to the mUPE.
  • the target eNB has joined the SFN area, which activates the MBMS service.
  • Step 1209 The target eNB sends a handover response message to the source eNB.
  • Step 1210 The source eNB sends a handover command to the UE.
  • Step 1211 The UE switches to the cell of the target eNB.
  • the UE performs the cell measurement and finds that the target eNB that meets the measurement condition does not transmit the MBMS service.
  • the UE is not in the active state or the standby state.
  • the specific method for activating the MBMS service of the target eNB is as follows:
  • Step 1301 The UE is receiving the MBMS service, performs measurement on the neighboring cell, and sends the measurement result to the source eNB.
  • Step 1302 The source eNB sends the measurement result to the MCE; or the source eNB performs a preliminary determination according to the measurement result of the UE, whether the MBMS extension needs to be performed, and sends the preliminary judgment result to the MCE; or the source eN B performs the measurement by itself.
  • the result is sent to the MCE along with the measurement results of the UE.
  • Step 1303 The MCE uses the eNB that meets the measurement condition as the target eNB, where the eNB is the neighboring eNB of the home eNB of the UE.
  • the MCE may use the eNB that meets the measurement condition as the target eNB according to the measurement result of the UE, or according to the preliminary judgment result of the source eNB, or according to the measurement result made by the source eNB and the measurement result of the UE.
  • the measurement condition is that the CPICH transmit power of the neighboring cell is greater than the CPICH transmit power of the local cell, or the CPICH transmit power of the neighboring cell is greater than the CPICH transmit power of the local cell, and the difference is greater than a preset threshold. Or, the CPICH transmit power of the neighboring cell is greater than a preset threshold.
  • the threshold value may be adjusted to determine whether there is an eNB that meets the adjusted measurement condition, and the eNB that meets the measurement condition is used as the target eNB, and the MBMS service of the target eNB is activated. Before the UE initiates cell reselection, the MBMS service of the target eNB that the UE may reselect is activated.
  • Step 1304 The MCE is based on the SFN of the locally stored eNB.
  • Area location status information knows whether the target eNB is in SFN
  • Step 1305 The MCE sends an extended indication message to the target eNB, where the message includes radio resource allocation information.
  • One or more cells within the coverage of B join SFN areao
  • Step 1306 The target eNB performs corresponding configuration according to the radio resource allocation information, and returns an extended indication response message to the MCE.
  • the MCE may further determine whether the eNB that meets the measurement condition meets the decision condition, and uses the eNB that meets the decision condition as the target eNB.
  • the decision conditions include: Whether the cell covered by it exceeds the maximum SFN
  • the load is less than the preset threshold, whether it belongs to the eNB that is allowed to join the SFN area in the local configuration information, and does not belong to the eNB that is prohibited from joining the SFN area in the local configuration information.
  • the MCE may only send an extended indication message to the target eNB, in step by the target eNB.
  • a join request message is sent to the mUPE, requesting to join the content distribution tree.
  • the method achieves that the signal received by the UE is poor, and the MBMS service of the neighboring eNB is activated, so that the UE receives the enhanced signal and improves the receiving quality of the MBMS service.
  • the UE in the standby state performs cell reselection and determines the target eNB, but the UE cannot determine whether the target eNB transmits the MBMS service, and the specific method flow of the MBMS service of the target eNB is activated. as follows:
  • Step 1401 The UE in the standby state performs cell reselection, determines whether there is an eNB that meets the cell reselection measurement condition in the neighboring eNB, and selects the eNB with the best measurement result from the eNB that meets the cell reselection measurement condition.
  • Target eNB For example, the transmit power values of the common pilot signals of the neighboring cells are compared, and the cell with the highest value is the best cell.
  • Step 1402 The UE sends an indication message to the source eNB, where the indication message includes MBMS-related information that the UE is receiving, such as, but not limited to, a service identifier, a single-frequency network area identifier, and a multicast group identifier.
  • MBMS-related information such as, but not limited to, a service identifier, a single-frequency network area identifier, and a multicast group identifier.
  • One or more of the ID target cell identifier and the target evolved base station identifier, and the indication message may further include a target cell identifier selected by the U E reselection algorithm.
  • Step 1403 After receiving the indication message, the source eNB forwards the message to the MCE.
  • Step 1404 The MCE determines, according to the MBMS-related information that the UE is receiving in the indication message, whether the target eNB is transmitting the MBMS service, and if yes, proceeding to step 1409, otherwise continuing to step 1405.
  • Step 1405 The MCE sends an extended indication message to the target eNB according to the identifier and the service identifier of the target eNB, where the message includes the radio resource allocation information, and requests the mUPE to join the content distribution tree, activate the MBMS service of the target eNB, and One or more cells corresponding to the target eNB join the SFN area.
  • Step 1406 The target eNB performs corresponding configuration according to the radio resource allocation information, and returns the extension to the MCE. Exhibition indication response message.
  • Step 1407 The MCE sends an extended response message to the source eNB.
  • Step 1408 The source eNB forwards the extended response message to the UE.
  • Step 1409 The UE reselects the cell to the target eNB.
  • the UE does not know whether the target cell has an MBMS service during the cell reselection process.
  • the MCE determines whether it needs to extend the MBMS service of the target cell according to the indication information.
  • the UE cannot determine whether the target eNB transmits the MBMS service, and activates the MBM of the target eNB.
  • Step 1501 The UE in the active state switches.
  • Step 1502 The UE performs measurement according to the measurement control message sent by the source eNB or the MCE, and reports the measurement result to the source eNB.
  • the measurement result includes but is not limited to: MBMS related information that the UE is receiving, such as but not limited to service identifier, single frequency network area identifier, Linyi multicast group identifier TMGI, session identifier Session
  • One or more of the ID target cell identifier and the target evolved base station identifier, and the indication message may further include U
  • the target cell identifier selected by the E reselection algorithm is the target cell identifier selected by the E reselection algorithm.
  • Step 1503 The source eNB performs handover decision according to the measurement result reported by the UE or combined with other information such as load.
  • the cell that meets the handover condition is selected as the target cell.
  • Step 1504 The source eNB sends an MBMS indication message to the MCE, where the indication message includes the MBMS-related information that the UE is receiving and the target cell identifier.
  • Step 1505 The MCE determines, according to the MBMS-related information that the UE is receiving in the indication message, whether the target eNB is transmitting the MBMS service, and if yes, proceeding to step 1509, otherwise continuing to step 1506.
  • Step 1506 The MCE sends an extended indication message to the target eNB, where the message includes radio resource allocation information.
  • Step 1507 The target eNB performs corresponding configuration according to the radio resource allocation information, and returns an extension indication response message to the MCE.
  • Step 1508 The target eNB sends a join request message to the mUPE to request to join the content distribution tree. or Sending a join request message to the mUPE requests to join the target eNB to the content distribution tree.
  • the target eNB has joined the SFN area, that is, the MBMS service is activated.
  • Step 1509 The target eNB sends a handover response message to the source eNB.
  • Step 1510 The source eNB sends a handover command to the UE.
  • Step 1511 The UE switches to the cell of the target eNB.
  • step 1509 and step 1510 are not necessarily in the order of the embodiment of the present invention, and may be performed in the same manner as the steps of the single frequency network extension.
  • the source eNB sends a handover request message to the target eNB, which may be in step 1504.
  • the downtime of the handover request transmission is not limited.
  • the UE moves, and the UE performs measurement according to the measurement control message during the mobile process, and reports the measurement result to the source eNB at a certain critical point, where the measurement report includes the UE receiving the measurement.
  • MBMS related information The source eNB performs a handover decision according to the measurement result of the UE and other load information, and selects a target cell.
  • the source eNB sends an MBMS indication message to the MCE, where the indication message includes that the UE is receiving.
  • MBMS related information and target cell identity The MCE judges whether the target cell has the transmission of these MBMS services, and if not, initiates an extended MBMS message to the target eNB where the target cell is located.
  • the method for activating the MBMS provided by the embodiment of the present invention can ensure that the UE is in a single cell transmission mode (Signle-cell).
  • MBMS service activation between cells by handover Moreover, if the target cell of the handover is Single-cell
  • the transmission mode cell needs to carry the radio parameters allocated by the target eNB for the MBMS service in the handover complete message, and mainly includes the parameter information of the service radio network service identifier RN, the modulation and coding mode, and the like, which are allocated to the MBMS service;
  • the target cell is a mixed-carrier SFN transmission mode cell, and the handover complete message needs to carry the radio transmission parameter of the service in the SFN area where the target cell is located, mainly including a multicast channel (Multicast).
  • Multicast multicast channel
  • MCH Physical Resource Block
  • PRB Physical Resource Block
  • the embodiment of the present invention provides a method for activating an MBMS service in multiple scenarios, and realizing the MBMS service in the target cell before the UE cell reselecting or switching to the target cell, ensuring that the UE cell reselects or switches to the target cell. After the MBMS business continuity.
  • the embodiment of the invention also provides a selective extended S FN
  • the area method ensures the continuity of the MBMS service in the mobile process of the UE, and effectively utilizes the network resources, and the UE can receive the enhanced signal and improve the receiving effect.

Abstract

L'invention concerne un procédé pour activer une diffusion multimédia et un service multidiffusion utilisé pour mettre en oeuvre l'activation d'un service MBMS de station de base à noeud évolué défini. Ledit procédé consiste : à déterminer une station de base à noeud évolué cible; à évaluer si la station de base à noeud évolué cible transmet le service MBMS; à envoyer un premier message indiquant que la station de base à noeud évolué cible est associées à une arborescence de distribution de contenu, et à envoyer des informations d'affectation d'accès radio à la station de base à noeud évolué cible au moyen d'une entité de coordination multidiffusion lorsque ladite station de base à noeud évolué cible ne transmet pas le service MBMS. L'invention concerne également un équipement utilisateur, une station de base à noeud évolué, une entité de coordination multidiffusion et des systèmes de communications.
PCT/CN2008/070271 2007-02-06 2008-02-03 Procédé et système pour activer une diffusion multimédia et un service multidiffusion WO2008098508A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN200710004811.9 2007-02-06
CN200710004811 2007-02-06
CN200710135672.3 2007-03-12
CN2007101356723A CN101242573B (zh) 2007-02-06 2007-03-12 激活多媒体广播与组播服务业务的方法及系统

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US9510226B2 (en) 2011-04-19 2016-11-29 Fujitsu Limited Information acquiring method and base station
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