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WO2012113199A1 - 一种网元获取用户设备的接收状况信息的方法及系统 - Google Patents

一种网元获取用户设备的接收状况信息的方法及系统 Download PDF

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Publication number
WO2012113199A1
WO2012113199A1 PCT/CN2011/077497 CN2011077497W WO2012113199A1 WO 2012113199 A1 WO2012113199 A1 WO 2012113199A1 CN 2011077497 W CN2011077497 W CN 2011077497W WO 2012113199 A1 WO2012113199 A1 WO 2012113199A1
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WO
WIPO (PCT)
Prior art keywords
mbms
network element
receiving
status information
target cell
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2011/077497
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English (en)
French (fr)
Inventor
杜晓
王斌
苟伟
马子江
许辉
赵斌
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ZTE Corp
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ZTE Corp
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Publication date
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Publication of WO2012113199A1 publication Critical patent/WO2012113199A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0007—Control or signalling for completing the hand-off for multicast or broadcast services, e.g. MBMS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H04W36/0044—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information of quality context information

Definitions

  • the present invention relates to the field of mobile multimedia communications, and in particular, to a method and system for a network element to acquire reception status information of a user equipment. Background technique
  • the 3rd Generation Partnership Project 3rd Generation Partnership Project proposes Multimedia Broadcast Multicast Service (MBMS), which is a data source from multiple sources to multiple targets.
  • MBMS Multimedia Broadcast Multicast Service
  • the technology for transmitting data by the mobile terminal realizes the sharing of network resources (including the core network and the access network), and improves the utilization of network resources (especially air interface resources).
  • MBMS defined by 3GPP can not only realize plain text low-rate message broadcast and multicast, but also enable high-speed multimedia service broadcast and multicast, providing a variety of rich video, audio and multimedia services, which undoubtedly conforms to future mobile
  • the trend of data development provides a better business prospect for the development of 3G.
  • MBMS technology has been introduced in the R9 version of LTE and has been implemented in the R10 version. Strong.
  • the control plane and the user plane of the MBMS in LTE are separated, the control plane transmits the control signaling of the MBMS, and the user plane transmits the data of the MBMS.
  • the evolved base station (eNB, evolved Node B) (hereinafter referred to as the base station) transmits the MBMS control information to the user equipment (UE, User Equipment) through the Broadcast Control Channel (BCCH, Broadcast Control Channel), and the UE according to the MBMS control information received from the BCCH in the MBMS
  • the configuration information of the MBMS is received on the control channel (MCCH, Multicast Control Channel), and then the UE can read the MBMS sent by the base station from the MBMS Traffic Channel (MTCH) according to the MBMS configuration information on the MCCH.
  • the MCCH and MTCH are finally multiplexed onto a Multicast Channel (MCH, Multicast Channel) for point-to-multipoint (PTM) transmission.
  • the scheduling period of the MCH is at least 80 ms, and is transmitted in the form of an MBMS Single Frequency Network (MBSFN) subframe.
  • the UE or the terminal that receives the MBMS may be in two states, one state is a Radio Resource Control (RRC) connection state (referred to as a connected state), and the other is an RRC idle state (referred to as an idle state).
  • RRC Radio Resource Control
  • the UE receives the unicast service the UE is in the connected state, and the UE in the idle state does not establish an RRC connection with the network side, and the UE in the connected state establishes an RRC connection with the network side.
  • the base station will configure a measurement gap for the UE, the measurement interval is 6ms in length and the period is 80ms.
  • FIG. 1 is a measurement interval in the prior art. Schematic diagram of the distribution of MBSFN subframes, as shown in FIG. 1, the shaded hatching indicates MBSFN radio frames, the grid shading indicates MBSFN radio subframes, and radio frame 2 and radio frame 4 are MBSFN radio frames, where, in radio frame #2 A total of 10 subframes from 0 to 9 are included, and subframe 1, subframe 3, subframe 5, and subframe 6 are MBSFN subframes for transmitting MBMS services.
  • the measurement interval may be configured to the radio frame for transmitting the MBMS.
  • the base station will have subframe 0 After a total of 6 subframes are allocated to the measurement interval of the UE, the UE cannot receive the MBMS on the subframe 1, the subframe 3, and the subframe 5.
  • the default measurement interval has a higher priority than the MBMS, because the base station First make sure that the unicast service is not affected). Therefore, the base station must know the reception status of the MBMS of the UE, and ensure that the UE receives the MBMS in the measurement interval, and avoid conflicts between the two.
  • the handover of the UE in the connected state is controlled by the base station.
  • the current handover principle is: The base station controls the UE measurement, and then comprehensively considers the signal quality and service load of the neighboring cell according to the measurement result of the UE, and switches the UE to a suitable cell.
  • the base station does not know the UE's reception status to the MBMS. Therefore, the cell selected by the base station for the UE may not be able to provide the MBMS that the UE is receiving.
  • the UE When the UE is handed over by the base station to a cell that cannot provide MBMS, the UE will not be able to continue receiving the MBMS. Therefore, the continuity of the UE receiving the MBMS cannot be guaranteed, and the UE user experience will be greatly affected.
  • the base station does not know the current MBMS reception status of the UE, and may configure the measurement interval on the subframe in which the MBMS service is being sent, so that the UE receives the The MBMS is interrupted.
  • the base station does not know the current MBMS reception status of the UE, and cannot ensure that the UE that is receiving the MBMS preferentially switches to the cell that is transmitting the service, so that the UE The continuity of receiving MBMS is not well guaranteed.
  • the base station can know the current MBMS reception status information of the UE as soon as possible, so that when the measurement interval is configured for the UE and the target cell is determined, the UE can currently receive the reception.
  • MBMS try to ensure continuous reception of the MBMS by the UE to improve the continuity of the MBMS and the user experience of the UE. Summary of the invention
  • the main purpose of the present invention is to provide a method and system for a network element to obtain receiving status information of a user equipment, and the network element can know in a timely manner that the cell controlled by the network is in a connected state.
  • the current MBMS reception status information of the UE is to provide a method and system for a network element to obtain receiving status information of a user equipment, and the network element can know in a timely manner that the cell controlled by the network is in a connected state.
  • the present invention provides a method for a network element to obtain receiving status information of a user equipment, where the method includes:
  • the user equipment When the user equipment (UE) starts to switch to the target cell, it sends the current status information of the multimedia broadcast multicast service (MBMS) to the network element of the target cell;
  • MBMS multimedia broadcast multicast service
  • the network element of the source cell sends the current MBMS reception status information of the UE to the network element of the target cell.
  • the UE is a UE that has an MBMS receiving capability and/or is receiving an MBMS or is interested in receiving an MBMS and is in a Radio Resource Control Protocol (RRC) connected state.
  • RRC Radio Resource Control Protocol
  • the current MBMS reception status information of the UE is information of an MBMS that the UE is currently receiving or interested in receiving;
  • the MBMS information that the UE is currently receiving or interested in receiving includes whether the current UE is receiving the MBMS, and/or the MBMS being received, and/or the MBSFN area of the MBMS, and/or the configuration information of the transmitted MBMS.
  • the network element that sends the current MBMS reception status information to the target cell is:
  • the UE uses the message to send the current MBMS reception status information to the network element of the target cell.
  • the message is an RRC Connection Reconfiguration Complete message or an RRC Connection Reestablishment Request message or an RRC Connection Reestablishment Complete message or a new RRC message.
  • the network element of the source cell sends the current MBMS receiving status information of the UE to the target cell:
  • the NE of the source cell passes the message on the X2 interface or uses the forwarding mode to forward the current UE.
  • the receiving status information of the MBMS is sent to the network element of the target cell.
  • the message on the X2 interface is a handover request message, or an establishment request message of the X2 interface, a base station configuration update message, or a mobility change request message, or an MBMS service reception status report message;
  • the forwarding mode is that the network element of the source cell sends the message of the current MBMS receiving status information of the UE to the mobility management node (MME) through the S1 interface, and then forwarded by the MME to the S1 interface between the target network element and the target network element.
  • MME mobility management node
  • the network element of the target cell, or the network element of the source cell sends a message carrying the current MBMS receiving status information of the UE to other neighboring network elements through the X2 interface, and then the neighboring network element sends the message through the X2 interface.
  • the network element of the target cell or the network element of the source cell, sends a message carrying the current MBMS reception status information of the UE to the multi-cell/multicast cooperative entity (MCE) through the M2 interface, and then the MCE forwards the message to the target cell network.
  • MCE multi-cell/multicast cooperative entity
  • the present invention further provides a system for a network element to obtain the receiving status information of the user equipment, where the system includes: a UE, a network element of the target cell, where
  • the UE when it is used to start the handover to the target cell, sends the current MBMS reception status information to the network element of the target cell;
  • the network element of the target cell is configured to receive the current MBMS receiving status information sent by the UE.
  • the UE is a UE that has an MBMS receiving capability and/or is receiving an MBMS or is interested in receiving an MBMS and is in an RRC connected state;
  • the current MBMS reception status information of the UE is information of an MBMS that the UE is currently receiving or interested in receiving;
  • the information of the MBMS that the UE is currently receiving or interested in receiving includes whether the current UE is receiving the MBMS, and/or the MBMS being received, and/or the MBSFN area of the MBMS, and/or the configuration information of the transmitted MBMS.
  • the present invention further provides a system for acquiring, by a network element, the receiving status information of the user equipment, where the system includes: a network element of the source cell, and a network element of the target cell;
  • the network element of the source cell is used to send the current MBMS reception status information of the UE to the network element of the target cell when the UE starts to switch to the target cell.
  • the network element of the target cell is configured to receive the current MBMS receiving status information sent by the network element of the source cell.
  • the UE is a UE that has an MBMS receiving capability and/or is receiving an MBMS or is interested in receiving an MBMS and is in an RRC connected state;
  • the current MBMS reception status information of the UE is information of an MBMS that the UE is currently receiving or interested in receiving;
  • the MBMS information that the UE is currently receiving or interested in receiving includes whether the current UE is receiving the MBMS, and/or the MBMS being received, and/or the MBSFN area of the MBMS, and/or the configuration information of the transmitted MBMS.
  • the method and system for acquiring the receiving status information of the user equipment by the network element provided by the present invention, when the UE starts to switch to the target cell, the current MBMS receiving status information is sent to the network element of the target cell; or the UE starts from the source cell.
  • the network element of the source cell sends the current MBMS reception status information of the UE to the network element of the target cell, and the network element can timely know the current MBMS reception status information of the UE in the connected state in the cell controlled by itself.
  • the network element of the UE or the source cell reports the MBMS information that the UE is receiving or interested in receiving, by the network element of the target cell, so that the network element of the target cell obtains the current MBMS of the UE.
  • the UE may be preferentially selected to maintain the continuity of the service, and the measurement interval may be configured on the non-MBMS service frame according to the current MBMS reception status information of the UE, thereby avoiding the UE.
  • the measurement interval conflicts with the reception of the MBMS, so that the UE can be avoided.
  • the interruption of the received MBMS thereby improving the continuity of the UE receiving service, and bringing a good user experience.
  • 1 is a schematic diagram of distribution of measurement intervals and MBSFN subframes in the prior art
  • Embodiment 2 is a schematic flowchart of Embodiment 1 of a method for implementing a network element to obtain receiving status information of a user equipment according to the present invention
  • Embodiment 3 is a schematic flowchart of Embodiment 2 of a method for implementing a method for a network element to acquire receiving status information of a user equipment according to the present invention
  • FIG. 4 is a schematic structural diagram of a system for acquiring a receiving status information of a user equipment by a network element according to the present invention
  • FIG. 5 is a schematic structural diagram of a system for acquiring a receiving status information of a user equipment by the network element of the present invention.
  • the basic idea of the present invention is: when the UE starts to switch to the target cell, the current MBMS reception status information is sent to the network element of the target cell; or when the UE starts to switch to the target cell, the source cell's network element will The current MBMS reception status information of the UE is sent to the network element of the target cell.
  • FIG. 2 is a schematic flowchart of the first embodiment of the method for the network element to obtain the receiving status information of the user equipment, as shown in FIG. Includes the following steps:
  • Step 201 The UE starts to switch to the target cell.
  • the UE refers to a UE that has an MBMS receiving capability and/or is receiving an MBMS or is interested in receiving an MBMS, and is in an RRC connected state.
  • the target cell refers to a new cell where the UE is switched. The UE starts to switch to the target cell, which means that the network element of the target cell sends a measurement control command for handover to the UE, and the preparation process of starting the handover; the target cell
  • the network element refers to a network element that controls the target cell after the UE is switched, and is also referred to as a target network element, such as a base station.
  • the UE starts to handover to the target cell, including the UE switching from the source cell to the target cell, or the UE accessing the cell for the first time (for convenience of description, the cell is also referred to as the target cell in this case);
  • the first time the UE searches for and accesses the target cell the UE synchronizes with the target network element for the first time and reports its own receiving status information, for example, when the UE is turned off, the mobile device is turned on, the UE is powered on, or the UE enters the target without the signal.
  • the cell, and receiving the system broadcast message in the target cell for the first time also needs to report its MBMS reception status information to the target network element.
  • Step 202 The UE sends the current MBMS receiving status information to the network element of the target cell.
  • the UE sends the current MBMS reception status information to the target network element by using a message, where the message is an existing RRC message, for example, an RRC Connection Recon figuration Complete message or an RRC connection re-establishment.
  • Requesting RRC Connection Reestablishment Request
  • RRC Connection Reestablishment Complete RRC Connection Reestablishment Complete
  • the message is a new RRC message
  • the UE uses the foregoing message to carry the receiving status information of the UE; After the message sent by the UE, determining whether to send the feedback information according to the type of the message, if the UE does not receive the feedback information, the message may be resent;
  • the current MBMS reception status information of the UE is sent to the target network element as a new information element (IE, Information Element) in the existing RRC message, and the current MBMS reception status information of the UE.
  • IE Information Element
  • the information about the MBMS that the UE is currently receiving or interested in receiving when the message is a new RRC message, the newly added RRC message is only used to carry the current MBMS receiving status information of the UE; the UE is currently receiving or interested.
  • the received MBMS information refers to whether the current UE is receiving the MBMS, and/or the MBMS being received, and/or the MBSFN area i of the MBMS, and/or the configuration information of the transmitted MBMS, etc.; for example, the UE is currently receiving Or the information of the MBMS that is of interest to receive may include One or more of the following information: MBMS Service ID, MBMS Session ID, MBSFN area ID, MBSFN Area Configuration, MBMS point-to-multipoint Wireless carrier configuration (MBMS PTM radio bearer configuration);
  • the target network element refers to the network element where the cell currently camped by the UE is located, for example, when the UE is powered off, moves to the target cell, then powers on again, and camps on the target cell.
  • the MME saves the context information of the UE for the first time. If the UE is receiving the MBMS or is interested in receiving the MBMS, the UE may also report its own receiving status information.
  • the target network element stores the received receiving status information, which is used as the reference information used by the target network element to switch or configure the measurement interval for the UE next time.
  • the target network element controls the UE to switch to the new cell, it first queries the UE to receive the current receiving. Or the information about the received MBMS, according to the information, try to control the UE to switch to the cell that can continue to provide the MBMS, or when the target network element configures the measurement interval for the UE, the measurement interval can be configured in the non-MBMS as much as possible.
  • the UE's measurement interval is avoided to collide with the MBMS that the UE is currently receiving or interested in receiving, so as to improve the UE's ability to continuously receive services.
  • the UE reports the MBMS information that is being received or is of interest to the target network element, so that the target network element obtains the current MBMS reception status information of the UE, and thus
  • the UE may preferentially select a cell that can maintain service continuity in a handover process; and when the cell is configured with the measurement interval, the measurement interval may be configured in a non-MBMS service frame according to the current MBMS reception status information of the UE.
  • the collision between the measurement interval of the UE and the reception of the MBMS is avoided.
  • the interruption of the MBMS that the UE is receiving can be avoided by the method provided in this embodiment, so as to improve the continuity of the UE receiving service and bring the user the continuity. Good experience.
  • FIG. 3 is a schematic diagram of a method for implementing a network element to obtain receiving status information of a user equipment according to the present invention
  • Step 301 The UE starts to switch from the source cell to the target cell.
  • the UE refers to a UE that has an MBMS receiving capability and/or is receiving an MBMS or is interested in receiving an MBMS, and is in an RRC connected state;
  • the source cell refers to a cell in which the UE is before the handover, and the target cell Refers to the new cell where the UE is switched after the UE is switched.
  • the UE starts to switch to the target cell from the source cell.
  • the base station of the source cell sends a measurement control command to the UE to control the UE to switch to the target cell.
  • the triggering condition for example, the signal quality of the base station of the source cell is lower than a certain level, or the signal quality of the base station of the source cell is lower than the signal quality of the base station of the neighboring cell.
  • Step 302 The network element of the source cell sends the current MBMS receiving status information of the UE to the network element of the target cell.
  • the network element of the source cell sends the current MBMS reception status information of the UE to the network element of the target cell by using the message on the X2 interface or by using the forwarding mode.
  • the source cell that is, the source network element, refers to the UE handover.
  • the network element of the cell in the previous cell such as a base station (eNB), a Mobility Management Entity (MME), or a multi-cell/Multicast Coordination Entity (MCE), the network element of the target cell
  • the target network element refers to the network element of the target cell after the UE is switched, such as a base station (eNB), an MME, or an MCE;
  • the current MBMS reception status information of the UE is a newly added IE, specifically the information of the MBMS that the UE is currently receiving or interested in receiving; the MBMS information that the UE is currently receiving or interested in receiving refers to whether the current UE is receiving the MBMS.
  • the information of the MBMS that the UE is currently receiving or interested in receiving may include one of the following information: Or multiple: MBMS Service ID, MBMS session ID, MBSFN area ID, MBSFN Area Configuration, MBMS point-to-multipoint radio bearer configuration (MBMS) PTM radio Bearer configuration )
  • the message on the X2 interface may be an existing message or a new message, where the existing message may be a Handover Request message, or an Setup Request message of the X2 interface, or a base station configuration update (eNB Configuration) Update) message, or Mobility Change Reques message, etc.; the new message may be an MBMS Service Reception Status Report message; the target network element may determine whether the message is received according to the type of the received message Give feedback;
  • the existing message may be a Handover Request message, or an Setup Request message of the X2 interface, or a base station configuration update (eNB Configuration) Update) message, or Mobility Change Reques message, etc.
  • the new message may be an MBMS Service Reception Status Report message
  • the target network element may determine whether the message is received according to the type of the received message Give feedback;
  • the source NE sends the message to the target NE through the X2 interface.
  • the message can be sent to the destination network through forwarding.
  • the forwarding mode is that the source network element sends the message of the current MBMS receiving status information of the UE to the MME through the S1 interface, and then forwards the message to the target network element, or source, by the MME through the S1 interface with the target network element.
  • the network element sends the message carrying the current MBMS receiving status information of the UE to other neighboring network elements through the X2 interface, and then the neighboring network element sends the message to the target network element through the X2 interface, or the source network element also
  • the message carrying the current MBMS receiving status information of the UE may be sent to the MCE through the M2 interface, and then forwarded by the MCE to the target network element; where the source network element and the target network element are respectively the MME and/or the MCE,
  • the message is transmitted between the MME and the MME, and/or between the MCE and the MCE, and/or between the MME and the MCE; in addition to the existing message using the above interface, the message carrying the current MBMS reception status information of the UE New messages can be utilized.
  • the new messages are new messages on some interfaces involved in the forwarding mode, such as messages on the S1 interface, or messages on the X2 interface of multiple adjacent network elements, or M2. a message on the interface or the M3 interface; the target network element stores the received status information of the current MBMS of the UE, and notifies the source network element to release information related to the UE; when the target network element needs to control the UE to switch to the new The network element first queries the MBMS receiving status information stored by the UE, and then selects the target network element for the UE according to the receiving status information, and ensures that the MBMS that the UE is receiving is not interrupted; In addition, when the target network element configures the measurement interval for the UE, the measurement interval can be configured as far as possible.
  • the MBMS is on the service frame to ensure that the MBMS being received by the UE is not interrupted.
  • the source network element notifies the target network element of the information of the MBMS that the UE is currently receiving or interested to receive through the X2 interface or the forwarding mode, so that the target network element can obtain the current MBMS of the UE.
  • the receiving status information may be used to preferentially select a target network element that can maintain service continuity for the UE in the next handover.
  • the target network element may configure the measurement interval for the UE according to the current MBMS receiving status information of the UE.
  • the measurement interval is configured on a non-MBMS service frame to avoid collision between the measurement interval of the UE and the reception of the MBMS.
  • the present invention further provides a system for acquiring a receiving status information of a user equipment by using a network element
  • FIG. 4 is a schematic structural diagram of a system for acquiring a receiving status information of a user equipment by the network element of the present invention, which is the method of the first embodiment.
  • the system includes: a UE 41, a network element 42 of a target cell, where
  • the UE 41 is configured to send its current MBMS receiving status information to the network element 42 of the target cell when it starts to switch to the target cell;
  • the network element 42 of the target cell is configured to receive the current MBMS reception status information sent by the UE 41.
  • the UE 41 is a UE that has an MBMS receiving capability and/or is receiving an MBMS or is interested in receiving an MBMS and is in an RRC connected state;
  • the receiving status information of the current MBMS of the UE 41 is information of the MBMS that the UE is currently receiving or interested in receiving;
  • the information of the MBMS that the UE 41 is currently receiving or interested in receiving includes whether the current UE is receiving the MBMS, and/or the MBMS being received, and/or the MBSFN area in which the MBMS is transmitted, and/or the configuration information of the transmitted MBMS.
  • the network element 42 that sends the current MBMS reception status information to the target cell is: when the UE 41 is switched from the source cell to the target cell, or when the UE 41 first accesses the target cell.
  • the UE 41 uses the message to send its current MBMS reception status information to the network element 42 of the target cell;
  • the message is an RRC Connection Reconfiguration Complete message or an RRC Connection Reestablishment Request message or
  • the RRC connection reestablishment completion message or a new RRC message is a new RRC message.
  • FIG. 5 is a schematic structural diagram of a system for acquiring a receiving status information of a user equipment by a network element of the present invention, and is a system corresponding to the method of the second embodiment.
  • the system includes: a network element 51 of a source cell, and a target cell.
  • Network element 52 wherein
  • the network element 51 of the source cell is used to send the current MBMS reception status information of the UE to the network element 52 of the target cell when the UE starts to switch to the target cell.
  • the network element 52 of the target cell is configured to receive the current MBMS receiving status information sent by the network element 51 of the source cell.
  • the UE is a UE that has an MBMS receiving capability and/or is receiving an MBMS or is interested in receiving an MBMS and is in an RRC connected state;
  • the current MBMS reception status information of the UE is information of an MBMS that the UE is currently receiving or interested in receiving;
  • the MBMS information that the UE is currently receiving or interested in receiving includes whether the current UE is receiving the MBMS, and/or the MBMS being received, and/or the MBSFN area of the MBMS, and/or the configuration information of the transmitted MBMS.
  • the network element 51 of the source cell sends the current MBMS reception status information of the UE to the network element 52 of the target cell.
  • the network element 51 of the source cell passes the message on the X2 interface or uses the forwarding mode to forward the current MBMS of the UE.
  • the reception status information is sent to the network element 52 of the target cell.
  • the message on the X2 interface is a handover request message, an establishment request message of the X2 interface, a base station configuration update message, a mobility change request message, and an MBMS service reception status report message;
  • the forwarding mode is that the network element of the source cell sends the message of the current MBMS receiving status information of the UE to the MME through the S1 interface, and then the MME forwards the message to the target cell through the S1 interface with the target network element.
  • the NE, or the network element of the source cell sends the message of the current MBMS receiving status information of the UE to the other neighboring network element through the X2 interface, and then the neighboring network element sends the message to the target cell through the X2 interface.
  • the network element, or the network element of the source cell sends a message carrying the current MBMS receiving status information of the UE to the MCE through the M2 interface, and then the MCE forwards the message to the network element of the target cell.

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  • Mobile Radio Communication Systems (AREA)

Abstract

本发明公开一种网元获取用户设备的接收状况信息的方法，包括：用户设备（UE）开始向目标小区切换时，将自身当前的多媒体广播多播业务（MBMS）的接收状况信息发送给目标小区的网元；或UE由源小区开始向目标小区切换时，源小区的网元将UE当前的MBMS的接收状况信息发送给目标小区的网元；本发明还提供一种网元获取用户设备的接收状况信息的系统。根据本发明的技术方案，网元可以及时获知自身控制的小区内处于连接态的UE当前的MBMS的接收状况信息。

Description

一种网元获取用户设备的接收状况信息的方法及系统 技术领域
本发明涉及移动多媒体通讯领域， 尤其涉及一种网元获取用户设备的 接收状况信息的方法及系统。 背景技术
随着 Internet的迅猛发展和大屏幕多功能的移动终端的迅速普及， 出现 了大量移动数据多媒体业务和各种高带宽多媒体业务， 如视频会议、 电视 广播、 视频点播、 广告、 网上教育、 互动游戏等， 一方面满足了移动用户 对多业务的需求， 同时也为移动运营商带来了新的业务增长点。 这些移动 数据多媒体业务要求多个用户能够同时接收相同数据， 与一般的数据业务 相比， 具有数据量大、 持续时间长、 时延敏感等特点。
为了有效地利用移动网络资源， 第三代合作伙伴计划 （3GPP , 3rd Generation Partnership Project ) 提出了多媒体广播多播业务 （MBMS , Multimedia Broadcast Multicast Service ), MBMS是一种从一个数据源向多 个目标移动终端传送数据的技术， 实现了网络资源（包括核心网和接入网 ) 的共享， 提高了网络资源（尤其是空中接口资源）的利用率。 3GPP定义的 MBMS不仅能够实现纯文本低速率的消息类广播和组播， 而且还能够实现 高速多媒体业务的广播和组播， 提供多种丰富的视频、 音频和多媒体业务， 这无疑顺应了未来移动数据发展的趋势，为 3G的发展提供了更好的业务前 景。
目前， 在 R9版本的 LTE中引入了 MBMS技术， 并在 R10版本中对其 进行了力。强。 LTE中的 MBMS的控制面和用户面分离，控制面传输 MBMS 的控制信令，用户面传输 MBMS的数据。具体的，演进型基站（ eNB, evolved Node B ) (后面简称基站）通过广播控制信道（BCCH, Broadcast Control Channel )将 MBMS的控制信息发送给用户设备（UE, User Equipment ), UE根据从 BCCH上接收到的 MBMS 的控制信息在 MBMS 的控制信道 ( MCCH, Multicast Control Channel )上接收 MBMS的配置信息， 然后根 据 MCCH上的 MBMS的配置信息，UE可以从 MBMS的业务信道（ MTCH, Multicast Traffic Channel )上读取基站发送的 MBMS。 MCCH和 MTCH最 终复用到多播信道 （MCH, Multicast Channel ) 上进行点到多点 （ PTM, Point-to-Multipoint )传输。其中， MCH的调度周期最小为 80ms,并以 MBMS 单频网 （ MBSFN , MBMS Single Frequency Network )子帧的方式传送。
接收 MBMS的 UE或终端可以处于两种状态， 一种状态为无线资源控 制协议（RRC, Radio Resource Control )连接态 （简称为连接态）， 另一种 为 RRC空闲态 （简称为空闲态）。 根据 UE或终端是否正在接收单播业务， 可以判断正在接收 MBMS的 UE是处于连接态还是处于空闲态。 当 UE在 接收单播业务时， UE处于连接态， 处于空闲态的 UE, 没有与网络侧建立 RRC连接， 处于连接态的 UE则与网络侧建立了 RRC连接。 当 UE处于连 接态时， 基站将为 UE配置测量间隔 （ measurement gap ), 该测量间隔长度 为 6ms, 周期为 80ms。
当处于连接态的 UE正在接收 MBMS时， 基站可能同时为其配置测量 间隔， 这样， 则基站发送的 MBSFN子帧将可能与为 UE配置的测量间隔冲 突，图 1是现有技术中测量间隔和 MBSFN子帧的分布示意图，如图 1所示， 斜线阴影表示 MBSFN无线帧， 网格阴影表示 MBSFN无线子帧， 无线帧 2 和无线帧 4为 MBSFN无线帧， 其中， 在无线帧 #2中， 包含 0到 9共 10个 子帧，子帧 1、子帧 3、子帧 5和子帧 6为发送 MBMS业务的 MBSFN子帧。 此时， 由于基站并不知道该 UE是否正在接收 MBMS, 因此配置测量间隔 时， 可能将测量间隔配置到发送 MBMS的无线帧上。 例如， 基站将子帧 0 到子帧 5共 6个子帧配置为该 UE的测量间隔， 则该 UE无法接收子帧 1、 子帧 3和子帧 5上的 MBMS(这里默认测量间隔的优先级高于 MBMS的接 收， 因为基站要首先确保单播业务不被影响）。 因此， 基站必需了解该 UE 的 MBMS的接收状况，确保在配置测量间隔时考虑到 UE对 MBMS的接收， 尽量避免两者的冲突。
此外， 处于连接态的 UE的切换是由基站控制的。 目前的切换原则是： 基站控制 UE测量，然后根据 UE的测量结果综合考虑相邻小区的信号质量 和业务负载情况， 将 UE切换到合适的小区。 但是， 对于正在接收 MBMS 的 UE, 基站并不知道该 UE对 MBMS的接收状况。 因此， 基站为 UE选择 的小区可能无法提供该 UE正在接收的 MBMS。 当 UE被基站切换到不能 提供 MBMS的小区后，UE将不能继续接收该 MBMS。从而 UE接收 MBMS 的连续性无法保证， UE的用户体验也将受到极大的影响。
因此， 现有技术的研究和实践过程中存在的以下问题： 第一， 基站不 知道 UE 目前的 MBMS 的接收状况， 可能会将测量间隔配置在正在发送 MBMS业务的子帧上， 导致 UE接收该 MBMS中断； 第二， UE釆用单播 的小区切换流程选择目标小区时， 基站不知道 UE目前的 MBMS的接收状 况， 无法确保正在接收 MBMS的 UE优先切换到正在发送该业务的小区， 使得 UE接收 MBMS的连续性得不到很好的保证。 针对这两个问题， 有必 要寻找这样一种方法： 基站能尽快的获知 UE当前的 MBMS的接收状况信 息， 从而在为该 UE配置测量间隔和确定目标小区时， 能考虑到 UE当前正 在接收的 MBMS , 尽量确保该 UE对 MBMS的连续接收， 以提高 MBMS 的连续性和 UE的用户体验。 发明内容
有鉴于此， 本发明的主要目的在于提供一种网元获取用户设备的接收 状况信息的方法及系统， 网元可以及时获知自身控制的小区内处于连接态 的 UE当前的 MBMS的接收状况信息。
为达到上述目的， 本发明的技术方案是这样实现的：
本发明提供一种网元获取用户设备的接收状况信息的方法， 该方法包 括：
用户设备（UE )开始向目标小区切换时， 将自身当前的多媒体广播多 播业务（MBMS ) 的接收状况信息发送给目标小区的网元；
或 UE 由源小区开始向目标小区切换时， 源小区的网元将 UE 当前的 MBMS的接收状况信息发送给目标小区的网元。
上述方法中，所述 UE为具有 MBMS接收能力的和 /或正在接收 MBMS 或感兴趣接收 MBMS的， 且处于无线资源控制协议（ RRC )连接态的 UE。
上述方法中，
所述 UE当前的 MBMS的接收状况信息为 UE当前正在接收或感兴趣 接收的 MBMS的信息；
所述 UE当前正在接收或感兴趣接收的 MBMS的信息包括当前 UE是 否正在接收 MBMS,和 /或正在接收的 MBMS,和 /或发送 MBMS的 MBSFN 区域， 和 /或发送的 MBMS的配置信息。
上述方法中， 所述 UE开始向目标小区切换时， 将自身当前的 MBMS 的接收状况信息发送给目标小区的网元为：
UE由源小区向目标小区切换时， 或 UE初次接入目标小区时， UE利 用消息将自身当前的 MBMS的接收状况信息发送给目标小区的网元；
所述消息为 RRC连接重配置完成消息或 RRC连接重建立请求消息或 RRC连接重建立完成消息或新增的 RRC消息。
上述方法中， 所述源小区的网元将 UE当前的 MBMS的接收状况信息 发送给目标小区的网元为：
源小区的网元通过 X2接口上的消息或利用转发方式， 将 UE 当前的 MBMS的接收状况信息发送给目标小区的网元。
上述方法中，
所述 X2接口上的消息为切换请求消息、 或 X2接口的建立请求消息、 基站配置更新消息、 或移动性改变请求消息、 或 MBMS服务接收现状报告 消息；
所述转发方式为源小区的网元将承载 UE当前的 MBMS的接收状况信 息的消息通过 S1接口发送到移动性管理节点 （ MME ), 再由 MME通过与 目标网元之间的 S1 接口转发给目标小区的网元， 或源小区的网元将承载 UE当前的 MBMS的接收状况信息的消息通过 X2接口发送到其他相邻的网 元， 再由该相邻的网元通过 X2接口将消息发送给目标小区的网元， 或源小 区的网元通过 M2接口将承载 UE当前的 MBMS的接收状况信息的消息发 送给多小区 /多播协作实体（MCE ), 再由 MCE转发给目标小区的网元。
本发明还提供一种网元获取用户设备的接收状况信息的系统， 该系统 包括： UE、 目标小区的网元； 其中，
UE,用于自身开始向目标小区切换时，将自身当前的 MBMS的接收状 况信息发送给目标小区的网元；
目标小区的网元，用于接收 UE发送的当前的 MBMS的接收状况信息。 上述系统中，
所述 UE为具有 MBMS接收能力的和 /或正在接收 MBMS或感兴趣接 收 MBMS的， 且处于 RRC连接态的 UE;
所述 UE当前的 MBMS的接收状况信息为 UE当前正在接收或感兴趣 接收的 MBMS的信息；
所述 UE当前正在接收或感兴趣接收的 MBMS的信息包括当前 UE是 否正在接收 MBMS,和 /或正在接收的 MBMS,和 /或发送 MBMS的 MBSFN 区域， 和 /或发送的 MBMS的配置信息。 本发明还提供一种网元获取用户设备的接收状况信息的系统， 其特征 在于， 该系统包括： 源小区的网元、 目标小区的网元； 其中，
源小区的网元， 用于 UE由源小区开始向目标小区切换时， 将 UE当前 的 MBMS的接收状况信息发送给目标小区的网元；
目标小区的网元， 用于接收源小区的网元发送的当前的 MBMS的接收 状况信息。
上述系统中，
所述 UE为具有 MBMS接收能力的和 /或正在接收 MBMS或感兴趣接 收 MBMS的， 且处于 RRC连接态的 UE;
所述 UE当前的 MBMS的接收状况信息为 UE当前正在接收或感兴趣 接收的 MBMS的信息；
所述 UE当前正在接收或感兴趣接收的 MBMS的信息包括当前 UE是 否正在接收 MBMS,和 /或正在接收的 MBMS,和 /或发送 MBMS的 MBSFN 区域， 和 /或发送的 MBMS的配置信息。
本发明提供的网元获取用户设备的接收状况信息的方法及系统， UE开 始向目标小区切换时，将自身当前的 MBMS的接收状况信息发送给目标 小区的网元； 或 UE 由源小区开始向目标小区切换时， 源小区的网元将 UE当前的 MBMS的接收状况信息发送给目标小区的网元， 网元可以及 时获知自身控制的小区内处于连接态的 UE 当前的 MBMS 的接收状况信 息， 从而可以实现在 UE的切换过程中， UE或源小区的网元通过向目标小 区的网元上报 UE正在接收或感兴趣接收的 MBMS的信息， 使得该目标小 区的网元获得 UE当前的 MBMS的接收状况信息， 在下一次切换过程中可 以为该 UE优先选择可以保持业务连续性的小区， 还可以根据 UE 当前的 MBMS的接收状况信息，将测量间隔配置在非 MBMS的业务帧上，从而避 免 UE的测量间隔和 MBMS的接收的发生冲突， 因此可以避免 UE正在接 收的 MBMS的中断， 进而提高 UE接收业务的连续性， 且给用户带来良好 的使用体验。 附图说明
图 1是现有技术中测量间隔和 MBSFN子帧的分布示意图；
图 2是本发明实现网元获取用户设备的接收状况信息的方法的实施例 一的流程示意图；
图 3是本发明实现网元获取用户设备的接收状况信息的方法的实施例 二的流程示意图；
图 4是本发明网元获取用户设备的接收状况信息的系统的结构示意图； 图 5是本发明网元获取用户设备的接收状况信息的系统的结构示意图。 具体实施方式
本发明的基本思想是： UE 开始向目标小区切换时， 将自身当前的 MBMS的接收状况信息发送给目标小区的网元； 或 UE由源小区开始向目 标小区切换时， 源小区的网元将 UE当前的 MBMS的接收状况信息发送给 目标小区的网元。
下面通过附图及具体实施例对本发明再做进一步的详细说明。
本发明提供一种网元获取用户设备的接收状况信息的方法， 图 2是本 发明实现网元获取用户设备的接收状况信息的方法的实施例一的流程示意 图， 如图 2所示， 该方法包括以下步骤：
步骤 201 , UE开始向目标小区切换；
具体的， 本发明实施例中， UE是指具有 MBMS接收能力的和 /或正在 接收 MBMS或感兴趣接收 MBMS的， 且处于 RRC连接态的 UE; 目标小 区是指 UE切换后所在的新小区， UE开始向目标小区切换是指目标小区的 网元向 UE发送用于切换的测量控制命令，开始切换的准备过程； 目标小区 的网元是指控制 UE切换后的目标小区的网元，也称为目标网元，例如基站
( eNB );这里，UE开始向目标小区切换包括 UE由源小区向目标小区切换， 或 UE初次接入小区， （为了叙述的简便， 在此情况下也称该小区为目标小 区）； 对于 UE初次搜索并接入到目标小区， 则 UE初次与目标网元同步并 上报自身的接收状况信息，例如当 UE关机后进行了移动，在目标小区中开 机，或 UE在无信号的状态下进入目标小区， 并第一次在该目标小区中接收 系统广播消息， 也需要向目标网元上报自身的 MBMS的接收状况信息。
步骤 202 , UE将自身当前的 MBMS的接收状况信息发送给目标小区的 网元；
具体的， UE利用消息将自身当前的 MBMS的接收状况信息发送给目 标网元， 该消息为现有的 RRC 消息， 例如， RRC连接重配置完成（RRC Connection Recon figuration Complete ) 消息或 RRC连接重建立请求 ( RRC Connection Reestablishment Request ) 消息或 RRC 连接重建立完成（ RRC Connection Reestablishment Complete )消息， 或该消息为新增的 RRC消息， UE利用上述消息来承载所述 UE的接收状况信息； 目标网元收到 UE发送 的消息后，根据消息的类型确定是否发送反馈信息，如果 UE没有接收到反 馈信息， 则可以重新发送消息；
当消息为现有的 RRC消息时， UE当前的 MBMS的接收状况信息作为 现有的 RRC消息中的新增信息元素（ IE, Information Element )发送给目标 网元， UE当前的 MBMS的接收状况信息具体为 UE当前正在接收或感兴 趣接收的 MBMS的信息； 当消息为新增的 RRC消息时 , 该新增的 RRC消 息仅用来承载 UE当前 MBMS的接收状况信息； UE当前正在接收或感兴 趣接收的 MBMS的信息是指当前 UE是否正在接收 MBMS,和 /或正在接收 的 MBMS, 和 /或发送 MBMS的 MBSFN区 i或， 和 /或发送的 MBMS的配置 信息等； 例如， UE当前正在接收或感兴趣接收的 MBMS的信息可以包括 以下信息中的一个或多个： MBMS业务 ID ( MBMS Service ID )、 MBMS 会话 ID ( MBMS session ID )、 MBSFN区域 ID ( MBSFN area ID )、 MBSFN 区域配置 （MBSFN Area Configuration ), MBMS 点到多点无线 载配置 ( MBMS PTM radio bearer configuration )等；
当 UE第一次驻留于目标网元（这里， 目标网元指 UE当前驻留的小区 所在的网元， 例如当 UE关机后移动到目标小区， 然后再开机， 并驻留到该 目标小区的网元 ) 时， MME第一次保存 UE的上下文信息， 此时如果 UE 正在接收 MBMS或感兴趣接收 MBMS , 则 UE也可以上报自身的接收状况 信息；
目标网元存储收到的接收状况信息，作为目标网元下一次为 UE切换或 配置测量间隔时利用的参考信息； 目标网元在控制 UE切换到新的小区时， 先查询自身 UE当前正在接收或感兴趣接收的 MBMS的信息，根据该信息， 尽量控制所述 UE切换到能继续提供该 MBMS的小区， 或当目标网元为该 UE配置测量间隔时， 可以尽量将测量间隔配置在非 MBMS的业务帧上， 以避免 UE的测量间隔和 UE当前正在接收或感兴趣接收的 MBMS发生冲 突， 以提高 UE连续接收业务的能力。
可以发现， 本实施例中， 在切换过程中， UE通过向目标网元上报自身 正在接收或感兴趣接收的 MBMS的信息， 使得该目标网元获得该 UE当前 的 MBMS的接收状况信息， 从而在下一次切换过程中可以为该 UE优先选 择可以保持业务连续性的小区； 而且， 当该小区在配置测量间隔时， 可以 根据 UE当前的 MBMS的接收状况信息，将测量间隔配置在非 MBMS的业 务帧上， 从而避免 UE的测量间隔和 MBMS的接收的发生冲突； 总之， 通 过本实施例中提供的方法， 可以避免 UE正在接收的 MBMS的中断， 以提 高 UE接收业务的连续性和给用户带来良好体验。
图 3是本发明实现网元获取用户设备的接收状况信息的方法的实施例 二的流程示意图， 如图 3所示， 该方法包括以下步骤：
步骤 301 , UE由源小区开始向目标小区切换；
具体的， 本发明实施例中， UE是指具有 MBMS接收能力的和 /或正在 接收 MBMS或感兴趣接收 MBMS的， 且处于 RRC连接态的 UE; 源小区 指 UE切换前所在的小区， 目标小区是指 UE切换后所在的新小区； UE由 源小区开始向目标小区切换是指当满足规范中规定的一些触发条件时， 源 小区的基站向 UE发送测量控制命令， 控制 UE向目标小区切换， 其中， 所 述触发条件例如源小区的基站的信号质量低于一定水平， 或源小区的基站 的信号质量低于其邻小区的基站的信号质量。
步骤 302 , 源小区的网元将 UE当前的 MBMS的接收状况信息发送给 目标小区的网元；
具体的， 源小区的网元通过 X2接口上的消息或利用转发方式， 将 UE 当前的 MBMS的接收状况信息发送给目标小区的网元； 源小区的网元即源 网元， 是指 UE切换前所在的小区的网元， 例如基站（eNB )、 移动性管理 节点（ MME, Mobility Management Entity )或多小区 /多播协作实体（ MCE , Multi-cell/Multicast Coordination Entity ), 目标小区的网元即目标网元， 是指 UE切换后的目标小区的网元， 例如基站（ eNB )、 MME或 MCE；
UE当前的 MBMS的接收状况信息为新增 IE, 具体为 UE当前正在接 收或感兴趣接收的 MBMS的信息； 所述 UE当前正在接收或感兴趣接收的 MBMS的信息是指当前 UE是否正在接收 MBMS ,和 /或正在接收的 MBMS, 和 /或发送 MBMS的 MBSFN区域， 和 /或发送的 MBMS的配置信息等； 例 如， UE当前正在接收或感兴趣接收的 MBMS的信息可以包括以下信息中 的一个或多个： MBMS业务 ID( MBMS Service ID )、 MBMS会话 ID( MBMS session ID )、 MBSFN区域 ID ( MBSFN area ID )、 MBSFN区域配置（ MBSFN Area Configuration ), MBMS 点到多点无线承载配置 （MBMS PTM radio bearer configuration )等；
X2接口上的消息可以是利用现有消息或新的消息， 其中， 现有消息可 以是切换请求 （Handover Request ) 消息、 或 X2接口的建立请求 （Setup Request ) 消息、 或基站配置更新 ( eNB Configuration Update ) 消息、 或移 动性改变请求（ Mobility Change Reques ) 消息等； 新的消息可以是 MBMS 业务接收状态报告（ MBMS Service Reception Status Report ) 消息； 目标网 元可以根据接收到的消息的类型， 确定是否进行反馈；
一般情况下， 源网元通过 X2接口将消息发送给目标网元， 但是当源网 元与目标网元之间没有直接的 X2接口或 X2接口不可用时， 可以通过转发 方式将消息发送给目标网元；转发方式是指源网元将承载 UE当前的 MBMS 的接收状况信息的消息通过 S1接口发送到 MME, 然后再由 MME通过与 目标网元之间的 S1 接口转发给目标网元， 或源网元将承载 UE 当前的 MBMS的接收状况信息的消息通过 X2接口发送到其他相邻的网元， 再由 该相邻的网元通过 X2接口将消息发送给目标网元， 或源网元也可以通过 M2接口将承载 UE当前的 MBMS的接收状况信息的消息发送给 MCE , 再 由 MCE转发给目标网元； 这里， 当源网元和目标网元分别为 MME和 /或 MCE时，可通过 MME与 MME之间、和 /或 MCE与 MCE之间、和 /或 MME 和 MCE之间的接口传输消息； 除了利用上述的接口的现有消息， 承载 UE 当前的 MBMS的接收状况信息的消息也可以利用新的消息， 新的消息是所 述转发方式中涉及到的一些接口上的新的消息， 例如 S1接口上的消息， 或 多个相邻的网元的 X2接口上的消息， 或 M2接口或 M3接口上的消息； 目标网元存储收到的 UE当前的 MBMS的接收状况信息， 并通知源网 元释放与该 UE有关的信息； 当该目标网元需要控制所述 UE切换到新的网 元时， 首先查询自身存储的所述 MBMS接收状况信息， 然后根据该接收状 况信息为 UE选择目标网元，尽量确保该 UE正在接收的 MBMS不会中断； 此外， 当该目标网元为 UE配置测量间隔时，可以尽量将测量间隔配置在非
MBMS的业务帧上， 以保证 UE正在接收的 MBMS不中断。
可以发现， 本实施例中， 在切换过程中， 源网元通过 X2接口或转发方 式将 UE当前正在接收或感兴趣接收的 MBMS的信息通知目标网元， 使得 目标网元可以获得 UE当前的 MBMS的接收状况信息， 在下次切换中可以 为该 UE优先选择可以保持业务连续性的目标网元； 此外， 目标网元在为该 UE配置测量间隔时， 可以根据 UE当前的 MBMS的接收状况信息， 将测 量间隔配置在非 MBMS 的业务帧上， 从而避免 UE的测量间隔和 MBMS 的接收的发生冲突。 通过本实施例中的方法， 提高 UE接收 MBMS的连续 性且给用户带来了良好的业务体验。
为实现上述方法， 本发明还提供一种网元获取用户设备的接收状况信 息的系统， 图 4是本发明网元获取用户设备的接收状况信息的系统的结构 示意图，是与实施例一的方法对应的系统，如图 4所示，该系统包括： UE 41、 目标小区的网元 42; 其中，
UE 41 , 用于自身开始向目标小区切换时， 将自身当前的 MBMS的接 收状况信息发送给目标小区的网元 42;
目标小区的网元 42 ,用于接收 UE 41发送的当前的 MBMS的接收状况 信息。
所述 UE 41为具有 MBMS接收能力的和 /或正在接收 MBMS或感兴趣 接收 MBMS的， 且处于 RRC连接态的 UE;
所述 UE 41当前的 MBMS的接收状况信息为 UE当前正在接收或感兴 趣接收的 MBMS的信息；
所述 UE 41当前正在接收或感兴趣接收的 MBMS的信息包括当前 UE 是否正在接收 MBMS , 和 /或正在接收的 MBMS , 和 /或发送 MBMS 的 MBSFN区域， 和 /或发送的 MBMS的配置信息。 所述 UE 41开始向目标小区切换时，将自身当前的 MBMS的接收状况 信息发送给目标小区的网元 42为： UE 41由源小区向目标小区切换时， 或 UE 41初次接入目标小区时， UE 41利用消息将自身当前的 MBMS的接收 状况信息发送给目标小区的网元 42;
所述消息为 RRC连接重配置完成消息或 RRC连接重建立请求消息或
RRC连接重建立完成消息或新增的 RRC消息。
图 5是本发明网元获取用户设备的接收状况信息的系统的结构示意图， 是与实施例二的方法对应的系统， 如图 5 所示， 该系统包括： 源小区的网 元 51、 目标小区的网元 52; 其中，
源小区的网元 51 , 用于 UE 由源小区开始向目标小区切换时， 将 UE 当前的 MBMS的接收状况信息发送给目标小区的网元 52;
目标小区的网元 52, 用于接收源小区的网元 51发送的当前的 MBMS 的接收状况信息。
所述 UE为具有 MBMS接收能力的和 /或正在接收 MBMS或感兴趣接 收 MBMS的， 且处于 RRC连接态的 UE;
所述 UE当前的 MBMS的接收状况信息为 UE当前正在接收或感兴趣 接收的 MBMS的信息；
所述 UE当前正在接收或感兴趣接收的 MBMS的信息包括当前 UE是 否正在接收 MBMS,和 /或正在接收的 MBMS,和 /或发送 MBMS的 MBSFN 区域， 和 /或发送的 MBMS的配置信息。
所述源小区的网元 51将 UE当前的 MBMS的接收状况信息发送给目标 小区的网元 52为：源小区的网元 51通过 X2接口上的消息或利用转发方式， 将 UE当前的 MBMS的接收状况信息发送给目标小区的网元 52。
所述 X2接口上的消息为切换请求消息、 X2接口的建立请求消息、 基 站配置更新消息、 移动性改变请求消息、 MBMS服务接收现状报告消息； 所述转发方式为源小区的网元将承载 UE当前的 MBMS的接收状况信 息的消息通过 S 1接口发送到 MME , 再由 MME通过与目标网元之间的 S 1 接口转发给目标小区的网元， 或源小区的网元将承载 UE当前的 MBMS的 接收状况信息的消息通过 X2接口发送到其他相邻的网元，再由该相邻的网 元通过 X2接口将消息发送给目标小区的网元，或源小区的网元通过 M2接 口将承载 UE当前的 MBMS的接收状况信息的消息发送给 MCE,再由 MCE 转发给目标小区的网元。
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， 凡在本发明的精神和原则之内所作的任何修改、 等同替换和改进 等， 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种网元获取用户设备的接收状况信息的方法， 其特征在于， 该方 法包括：
用户设备（UE )开始向目标小区切换时， 将自身当前的多媒体广播多 播业务（MBMS ) 的接收状况信息发送给目标小区的网元；
或 UE 由源小区开始向目标小区切换时， 源小区的网元将 UE 当前的 MBMS的接收状况信息发送给目标小区的网元。
2、 根据权利要求 1所述的方法， 其特征在于， 所述 UE为具有 MBMS 接收能力的和 /或正在接收 MBMS或感兴趣接收 MBMS的 , 且处于无线资 源控制协议（ RRC )连接态的 UE。
3、 根据权利要求 1所述的方法， 其特征在于，
所述 UE当前的 MBMS的接收状况信息为 UE当前正在接收或感兴趣 接收的 MBMS的信息；
所述 UE当前正在接收或感兴趣接收的 MBMS的信息包括当前 UE是 否正在接收 MBMS,和 /或正在接收的 MBMS,和 /或发送 MBMS的 MBSFN 区域， 和 /或发送的 MBMS的配置信息。
4、 根据权利要求 1所述的方法， 其特征在于， 所述 UE开始向目标小 区切换时，将自身当前的 MBMS的接收状况信息发送给目标小区的网元为：
UE由源小区向目标小区切换时， 或 UE初次接入目标小区时， UE利 用消息将自身当前的 MBMS的接收状况信息发送给目标小区的网元；
所述消息为 RRC连接重配置完成消息或 RRC连接重建立请求消息或 RRC连接重建立完成消息或新增的 RRC消息。
5、 根据权利要求 1 所述的方法， 其特征在于， 所述源小区的网元将 UE当前的 MBMS的接收状况信息发送给目标小区的网元为：
源小区的网元通过 X2接口上的消息或利用转发方式， 将 UE 当前的 MBMS的接收状况信息发送给目标小区的网元。
6、 根据权利要求 5所述的方法， 其特征在于，
所述 X2接口上的消息为切换请求消息、 或 X2接口的建立请求消息、 或基站配置更新消息、 或移动性改变请求消息、 或 MBMS服务接收现状报 告消息；
所述转发方式为源小区的网元将承载 UE当前的 MBMS的接收状况信 息的消息通过 S1接口发送到移动性管理节点（MME ) , 再由 MME通过与 目标网元之间的 S1 接口转发给目标小区的网元， 或源小区的网元将承载 UE当前的 MBMS的接收状况信息的消息通过 X2接口发送到其他相邻的网 元， 再由该相邻的网元通过 X2接口将消息发送给目标小区的网元， 或源小 区的网元通过 M2接口将承载 UE当前的 MBMS的接收状况信息的消息发 送给多小区 /多播协作实体（MCE ) , 再由 MCE转发给目标小区的网元。
7、 一种网元获取用户设备的接收状况信息的系统， 其特征在于， 该系 统包括： UE、 目标小区的网元； 其中，
UE,用于自身开始向目标小区切换时，将自身当前的 MBMS的接收状 况信息发送给目标小区的网元；
目标小区的网元，用于接收 UE发送的当前的 MBMS的接收状况信息。
8、 根据权利要求 7所述的系统， 其特征在于，
所述 UE为具有 MBMS接收能力的和 /或正在接收 MBMS或感兴趣接 收 MBMS的， 且处于 RRC连接态的 UE;
所述 UE当前的 MBMS的接收状况信息为 UE当前正在接收或感兴趣 接收的 MBMS的信息；
所述 UE当前正在接收或感兴趣接收的 MBMS的信息包括当前 UE是 否正在接收 MBMS,和 /或正在接收的 MBMS,和 /或发送 MBMS的 MBSFN 区域， 和 /或发送的 MBMS的配置信息。
9、 一种网元获取用户设备的接收状况信息的系统， 其特征在于， 该系 统包括： 源小区的网元、 目标小区的网元； 其中，
源小区的网元， 用于 UE由源小区开始向目标小区切换时， 将 UE当前 的 MBMS的接收状况信息发送给目标小区的网元；
目标小区的网元， 用于接收源小区的网元发送的当前的 MBMS的接收 状况信息。
10、 根据权利要求 9所述的系统， 其特征在于，
所述 UE为具有 MBMS接收能力的和 /或正在接收 MBMS或感兴趣接 收 MBMS的， 且处于 RRC连接态的 UE;
所述 UE当前的 MBMS的接收状况信息为 UE当前正在接收或感兴趣 接收的 MBMS的信息；
所述 UE当前正在接收或感兴趣接收的 MBMS的信息包括当前 UE是 否正在接收 MBMS,和 /或正在接收的 MBMS,和 /或发送 MBMS的 MBSFN 区域， 和 /或发送的 MBMS的配置信息。
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