WO2016101268A1 - 一种多媒体广播/多播业务mbms的通信方法、基站及用户设备 - Google Patents

一种多媒体广播/多播业务mbms的通信方法、基站及用户设备 Download PDF

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Publication number
WO2016101268A1
WO2016101268A1 PCT/CN2014/095144 CN2014095144W WO2016101268A1 WO 2016101268 A1 WO2016101268 A1 WO 2016101268A1 CN 2014095144 W CN2014095144 W CN 2014095144W WO 2016101268 A1 WO2016101268 A1 WO 2016101268A1
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base station
information
service
mbms
request message
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PCT/CN2014/095144
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English (en)
French (fr)
Inventor
曹龙雨
李志明
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华为技术有限公司
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Priority to CN201480083781.3A priority Critical patent/CN107005815A/zh
Priority to PCT/CN2014/095144 priority patent/WO2016101268A1/zh
Publication of WO2016101268A1 publication Critical patent/WO2016101268A1/zh

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    • 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
    • H04W36/00—Hand-off or reselection arrangements

Definitions

  • the present invention relates to the field of communications, and in particular, to a communication method, a base station, and a user equipment of a multimedia broadcast/multicast service MBMS.
  • Multimedia Broadcast/Multicast Service is a feature introduced in the 3GPP Release 6 release and is the cornerstone of the mobile TV service.
  • MBMS supports two modes: multimedia broadcast service and multicast service. It can broadcast multimedia video information directly to all users or to a group of paid subscription users. It can help operators to carry out multimedia advertisements, free and paid TV channels. And a variety of commercial applications such as MMS, so that operators can carry out mobile TV services with lower network deployment costs.
  • Step 1 The Evolved Universal Terrestrial Radio Access Network (E-UTRAN) broadcasts the MBMS Service Area Identity (SAI) information of the E-UTRAN corresponding cell in the system broadcast message SIB15. It corresponds to the system frequency of the cell, and also broadcasts the MBMS SAI information of the E-UTRAN neighboring cell and the system frequency of the neighboring cell through the SIB15. That is to say, the SIB 15 broadcasts a SAI list, a frequency list, and a correspondence between SAI and Frequency.
  • SAI Service Area Identity
  • Step 2 The UE listens to the SIB 15 of the E-UTRAN broadcast, and determines whether the SAI in the User Service Description (USD) saved by the UE is the SAI in the SAI list broadcast by the SIB 15. If yes, the UE reads the system frequency corresponding to the SAI in the SIB15, and sends an MBMS Interest Indication message to the E-UTRAN, where the message includes the system frequency corresponding to the SAI that the UE is interested in. Based on this, the E-UTRAN determines the SAI corresponding to the system frequency, and switches the UE to the neighboring E-UTRAN corresponding to the SAI.
  • USD User Service Description
  • the E-UTRAN when the E-UTRAN switches the UE according to the frequency point, the UE may be switched to the UE at the frequency point.
  • the base station of the service of interest which causes the service of interest to the UE to be interrupted, affecting the user experience.
  • the embodiments of the present invention provide a communication method, a base station, and a communication system for an MBMS, which can ensure the continuity of the MBMS that is of interest to the UE and improve the user experience.
  • a method for communicating MBMS comprising:
  • the first base station acquires the first information reported by the user equipment UE, where the first information includes a correspondence between the service information of the MBMS that is of interest to the UE and the frequency of broadcasting the service, where the MBMS service information is used. Representing the type of the MBMS service;
  • the first base station acquires the second information reported by the multiple neighboring base stations of the first base station, and the second information reported by each neighboring base station includes the MBMS service information broadcasted by the neighboring base station and the broadcast Correspondence between frequency points of the service;
  • the first base station selects a second base station from the plurality of neighboring base stations according to the first information and the second information, and switches the UE to the second base station.
  • the second base station broadcasts a first quantity of MBMSs that are of interest to the UE, where the first quantity is not less than the multiple neighboring base stations. Any other neighboring cell base station outside the second base station broadcasts the number of MBMSs that the UE is interested in.
  • a method for communicating MBMS comprising:
  • the user equipment UE reports the first information to the first base station, so that the first base station selects the second base station from the multiple neighboring base stations according to the first information and the second information reported by the multiple neighboring base stations. ;and
  • the first information includes a correspondence between the service information of the MBMS that is of interest to the UE and the frequency of broadcasting the service, where the service information is used to indicate the The type of the service;
  • the second information reported by each neighboring cell base station includes a correspondence between the MBMS service information broadcast by the neighboring cell base station and the frequency of broadcasting the service.
  • the second base station broadcasts a first quantity of MBMSs that are of interest to the UE, where the first quantity is not less than the multiple neighboring base stations. Any other neighboring cell base station outside the second base station broadcasts the number of MBMSs that the UE is interested in.
  • a method for communicating MBMS comprising:
  • the second base station sends a request message carrying the second information to the first base station of the serving user equipment UE, so that the first base station selects a target service for the handover according to the first information and the second information reported by the UE.
  • Base station and
  • the first information includes a correspondence between the service information of the MBMS that is of interest to the UE and the frequency of broadcasting the service, where the service information is used to indicate the type of the service; And including a correspondence between the MBMS service information broadcast by the second base station and the frequency of broadcasting the service.
  • a method for communicating an MBMS comprising:
  • the second base station receives the X2 interface switching request message sent by the first base station of the serving user equipment UE, where the handover request message includes indication information for instructing the second base station to report the second information to the first base station;
  • the second base station Transmitting, by the second base station, the handover response message carrying the second information to the first base station, according to the indication information, so that the first base station is configured according to the first information and the second information reported by the UE Selecting a target serving base station for handover for the UE;
  • the first information includes a correspondence between the service information of the MBMS that is of interest to the UE and the frequency of broadcasting the service, where the service information is used to indicate the type of the service; And including a correspondence between the MBMS service information broadcast by the second base station and the frequency of broadcasting the service.
  • a base station including:
  • a receiver configured to acquire first information reported by the user equipment UE, where the first information is Corresponding relationship between the service information of the multimedia broadcast/multicast service MBMS that is of interest to the UE and the frequency of broadcasting the service, where the service information is used to indicate the type of the service;
  • the receiver is further configured to acquire the second information reported by the multiple neighboring base stations of the base station, where the second information reported by each neighboring base station includes the MBMS service information broadcasted by the neighboring base station and the broadcast Correspondence between frequency points of the service;
  • a processor configured to select, according to the first information and the second information, a second base station from the multiple neighboring base stations, and switch the UE to the second base station.
  • the second base station broadcasts a first quantity of MBMSs that are interested in the UE, where the first quantity is not less than the multiple neighboring base stations Any other neighboring cell base station outside the second base station broadcasts the number of MBMSs that the UE is interested in.
  • a UE including:
  • a transmitter configured to report the first information to the first base station, so that the first base station selects the first neighboring base station according to the first information and the second information reported by the multiple neighboring base stations Two base stations;
  • a receiver configured to receive a handover instruction sent by the first base station, to switch to the second base station according to the handover instruction
  • the first information includes a correspondence between the service information of the multimedia broadcast/multicast service MBMS that is of interest to the UE and the frequency of broadcasting the service, where the service information is used to indicate the type of the service.
  • the second information reported by each neighboring cell base station includes a correspondence between the MBMS service information broadcast by the neighboring cell base station and the frequency of broadcasting the service.
  • the second base station broadcasts a first quantity of MBMSs that are of interest to the UE, where the first quantity is not less than the multiple neighboring base stations. Any other neighboring cell base station outside the second base station broadcasts the number of MBMSs that the UE is interested in.
  • a base station including:
  • a transmitter configured to send a request message carrying the second information to the first base station of the serving user equipment UE, so that the first base station according to the first information reported by the UE and the The second information is a target serving base station that the UE selects to switch;
  • a receiver configured to receive a response message sent by the first base station according to the request message
  • the first information includes a correspondence between the service information of the multimedia broadcast/multicast service MBMS that is of interest to the UE and the frequency of broadcasting the service, where the service information is used to indicate the type of the service.
  • the second information includes a correspondence between MBMS service information broadcast by the base station and a frequency point of broadcasting the service.
  • a base station including:
  • a receiver configured to receive an X2 interface switching request message sent by the first base station serving the user equipment UE, where the handover request message includes indication information for instructing the base station to report the second information to the first base station;
  • a transmitter configured to send, according to the indication information, a handover response message carrying the second information to the first base station, so that the first base station is configured according to the first information and the second information reported by the UE Selecting a target serving base station for handover for the UE;
  • the first information includes a correspondence between the service information of the multimedia broadcast/multicast service MBMS that is of interest to the UE and the frequency of broadcasting the service, where the service information is used to indicate the type of the service.
  • the second information includes a correspondence between MBMS service information broadcast by the base station and a frequency point of broadcasting the service.
  • the present invention provides a communication method of a MBMS, a base station, and a UE, where the first base station acquires first information reported by the UE, where the first information includes a correspondence between the service information of the MBMS that the UE is interested in and the frequency of the broadcast service. Acquiring the second information reported by the neighboring cell base station, where the second information reported by each neighboring cell base station includes a correspondence between the MBMS service information broadcast by the neighboring cell base station and the frequency of the broadcast service; according to the first information and the second information A second base station is selected from the neighboring base stations, and the UE is handed over to the second base station.
  • the correspondence between the service information of the MBMS service that the UE is interested in and the frequency of broadcasting the service needs to be considered, and the service broadcast by the neighboring cell eNB needs to be considered.
  • the corresponding frequency point information, and the UE is switched to the appropriate target serving eNB according to the result of the matching between the two, thereby ensuring the continuity of the MBMS service that the UE is interested in during the handover process, and improving the user experience.
  • FIG. 1 is a schematic diagram of a prior art MBMS communication method
  • FIG. 2 is a logical architecture diagram of an MBMS in an LTE network
  • FIG. 3A is a schematic diagram of an E-UTRAN according to an embodiment of the present invention.
  • FIG. 3B is a schematic diagram of signaling interaction of an MBMS communication method according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a method performed by a serving base station according to an MBMS communication method according to an embodiment of the present invention
  • FIG. 5A to FIG. 5E are schematic diagrams of acquiring second information from a neighboring cell base station according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of a method performed by a UE according to an MBMS communication method according to an embodiment of the present invention
  • FIG. 7A and FIG. 7B are flowcharts executed by a neighboring cell base station according to an MBMS communication method according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of a serving base station according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a UE according to an embodiment of the present invention.
  • FIGS. 10A and 10B are schematic diagrams showing a neighboring cell base station according to the present invention.
  • 11A and 11B are schematic views of a communication system provided in accordance with the present invention.
  • FIG. 2 shows the logical architecture of MBMS in a long term evolution (LTE) network.
  • the MBMS framework 200 includes the following network elements: a Broadcast-Multicast Service Centre (BM-SC) 201, an MBMS Gateway (MBMS Gateway, MBMS-GW) 202, and a mobility management network element ( Mobility Management Entity (MME) 203, Multi-cell/Multicast Coordination Entity (MCE) 204, and Evolved Universal Terrestrial Radio Access Network (E-UTRAN) 205 .
  • BM-SC Broadcast-Multicast Service Centre
  • MME Mobility Management Entity
  • MCE Multi-cell/Multicast Coordination Entity
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • the BM-SC 201 belongs to the service layer network element and is an entry of the content provider, and is used for providing aggregation and transmission of services, authorization of users (gene generation and transmission of keys), establishment and initiation of MBMS bearers, session control, and the like. .
  • the BM-SC 201 can also achieve synchronization with the E-UTRAN 205 at the same time.
  • the MBMS-GW 202 as a node between the BM-SC 201 and the E-UTRAN 205, is an access gateway of the network and is responsible for processing user data related messages and session related signaling.
  • the MME 203 is a control plane network element node and mainly participates in session control management of the MBMS.
  • the MCE 204 is mainly used for scheduling services, that is, allocating appropriate resources (including parameters such as frequency and time) to perform Multicast Broadcast Single Frequency Network (MBSFN) transmission.
  • MBSFN Multicast Broadcast Single Frequency Network
  • the MCE 204 needs to coordinate its corresponding multiple MBSFN transmissions, including the size of the MBSFN area, the use of radio resources, and the like, so that resources can be used reasonably and efficiently.
  • MBSFN transmission is a synchronous transmission mode of MBMS.
  • Each MBMS service area may cover multiple MBSFN areas, and each MBMS service area corresponds to one SAI.
  • Each MBSFN area may in turn cover multiple eNBs, and thus each eNB may correspond to one or more SAIs.
  • each eNB since each eNB can also be covered by multiple MBSFN areas at the same time, each MBSFN area uses one frequency to synchronously transmit data, that is, each MBSFN area corresponds to one system frequency point. Therefore, each eNB can correspond to one or more frequency points.
  • the E-UTRAN 205 includes a serving base station eNB1 and a neighboring area.
  • Base stations for example, eNB2 and eNB3.
  • eNB1 is covered by the MBSFN first area (MBSFN area 1)
  • eNB2 is covered by the MBSFN second area (MBSFN area 2)
  • eNB3 is covered by the MBSFN third area (MBSFN area 3).
  • MBSFN area 1 MBSFN first area
  • MBSFN area 2 MBSFN second area
  • MBSFN area 3 MBSFN third area
  • the present invention is not limited thereto, and in other embodiments, any eNB may be covered by multiple MBSFN areas.
  • the eNB1 is configured with configuration information of the local station and configuration information of the neighboring base station, where the configuration information includes the SAI and the frequency point corresponding to the base station.
  • the configuration information of the eNB1 or the configuration information of the neighboring base station may be any of the following forms: ⁇ SAI1—f1 ⁇ , ⁇ SAI1, SAI2—f1 ⁇ , ⁇ SAI1—f1, f1 ⁇ , or ⁇ SAI1, SAI2—f1, f1 ⁇ .
  • ⁇ SAI1—f1 ⁇ indicates that the base station corresponds to one SAI (ie, SAI1) and corresponds to one frequency point (ie, f1);
  • ⁇ SAI1, SAI2—f1 ⁇ indicates that the base station corresponds to multiple SAIs (ie, SAI1 and SAI2).
  • ⁇ SAI1 - f1, f1 ⁇ indicates that the base station corresponds to one SAI (ie, SAI1) and corresponds to multiple frequency points (ie, f1 and f2);
  • ⁇ SAI1, SAI2-f1 , f1 ⁇ indicates that the base station corresponds to a plurality of SAIs (ie, SAI1 and SAI2), and corresponds to a plurality of frequency points (ie, f1 and f2).
  • FIG. 3B is a signaling interaction diagram of an MBMS communication method according to an embodiment of the present invention.
  • FIG. 3B will be described in conjunction with FIG. 3A.
  • the method is applicable to the handover process of the UE 206, and specifically includes the following steps:
  • the serving base station eNB1 of the current cell broadcasts the configuration information of the base station and the neighboring base station to the UE 206 through the system broadcast message SIB15.
  • Configuration information includes eNB1, eNB2
  • eNB1 corresponds to SAI1 and f1
  • eNB2 corresponds to SAI2 and f2
  • eNB3 corresponds to SAI3 and f2.
  • the eNB1 broadcasts the SAI column to the UE 206 through the system broadcast message SIB15.
  • Table ⁇ SAI1, SAI2, SAI3 ⁇ , frequency point list ⁇ f1, f2 ⁇ , and the correspondence between SAI and frequency points is ⁇ SAI1 - f1; SAI2 - f2; SAI3 - f2 ⁇ .
  • the UE 206 determines whether the saved SAI belongs to the SAI in the frequency list broadcast by the eNB1.
  • the USD saved by the UE 206 includes a correspondence between a Temporary Mobile Group Identity (TMGI) and one or more SAIs.
  • TMGI Temporary Mobile Group Identity
  • the UE 206 listens to the SIB15 message of the E-UTRAN broadcast and determines whether the SAI in the USD saved by itself is the SAI in the frequency list of the SIB15 broadcast. If so, the UE 206 reads the frequency point corresponding to the SAI in the SIB15 message.
  • the SAI belonging to the SAI list only corresponds to one frequency point.
  • the UE 206 reads a corresponding frequency point. For example, suppose the UE is interested in an MBMS service, and the corresponding relationship stored in the USD is ⁇ TMGI1 - SAI2 ⁇ . After the UE listens to the broadcast message SIB15, it determines that the SAI2 is in the frequency list of the SIB15, and according to the correspondence, it is learned that the frequency point corresponding to the SAI2 is f2.
  • the present invention is not limited thereto.
  • the UE 206 needs to read. Take all the frequency points corresponding to the SAI in the SIB15 message.
  • the UE 206 reports the first information to the eNB1 by using the MBMS interest indication message, where the first information includes a correspondence between the service information of the MBMS service that the UE is interested in and the frequency of broadcasting the service. That is to say, the MBMS interest indication message reported by the UE 206 includes the frequency point corresponding to the SAI, and the MBMS interest indication message further includes the service information of the MBMS service that the UE is interested in.
  • the service information is used to indicate the type of MBMS service that the UE is interested in, for example, the service information includes TMGI, or other identifier that can identify the MBMS service type.
  • the UE 206 determines that the frequency point corresponding to SAI2 is f2, it reports ⁇ TMGI1-f2 ⁇ to eNB1.
  • the eNB1 currently serving the UE can know which MBMS services are interested in each UE and at which frequency points the services of interest are broadcast.
  • the neighboring cell base station (for example, eNB2 and eNB3) reports the second information to the serving base station eNB1, where the second information includes the MBMS service information broadcast by the neighboring cell eNB and its corresponding frequency point information.
  • both eNB2 and eNB3 broadcast MBMS traffic at frequency f2.
  • eNB2 broadcasts MBMS service with TMGI1 on frequency f2
  • eNB3 broadcasts MBMS service with TMGI2 on frequency f2. Therefore, the self-broadcast service reported by the eNB2 and its corresponding frequency point information is ⁇ TMGI1-f2 ⁇ , and the self-broadcast service reported by the eNB3 and its corresponding frequency point information is ⁇ TMGI2-f2 ⁇ .
  • the eNB1 selects a target serving eNB for the UE according to the first information reported by the UE and the second information reported by the neighboring eNB, and switches the UE to the target serving eNB.
  • the first information reported by the UE includes ⁇ TMGI1-f2 ⁇
  • the second information reported by the eNB2 includes ⁇ TMGI1-f2 ⁇
  • the second information reported by the eNB2 includes ⁇ TMGI2-f2 ⁇ . Therefore, eNB1 determines that eNB2 can broadcast the MBMS service with TMGI1 of interest to UE 206 at frequency f2, and accordingly switches UE 206 to eNB2.
  • the UE when different base stations broadcast different services at the same frequency point, in the prior art, the UE only reports the frequency point corresponding to the SAI belonging to the SAI list, for example, the frequency point f2. Since both eNB2 and eNB3 broadcast the MBMS service at frequency f2, only eNB2 broadcasts the service of interest to the UE at frequency f2. If the eNB1 switches the UE to the eNB3, the eNB3 does not broadcast the service of the UE at the frequency f2, which may cause the service of the UE to be interrupted, which affects the user experience.
  • the present invention provides a method of maintaining the business continuity of an MBMS.
  • the correspondence between the service information of the MBMS service that the UE is interested in and the frequency of broadcasting the service needs to be considered, and the service broadcast by the neighboring cell eNB needs to be considered.
  • the corresponding frequency point information, and the UE is switched to the appropriate target eNB according to the result of the matching of the two, thereby ensuring the continuity of the MBMS service that the UE is interested in during the handover process.
  • the eNB1 may preferentially select an eNB capable of broadcasting as many services as possible by the UE as the target eNB according to the first information reported by the UE and the second information reported by the neighboring eNB, and switch the UE to the target eNB.
  • the selected target eNB broadcasts the first number of MBMS services that are of interest to the UE, and the first number is not less than any neighboring base stations of the plurality of neighboring base stations except the target base station, and the UE is interested in broadcasting.
  • the number of MBMS is not less than any neighboring base stations of the plurality of neighboring base stations except the target base station.
  • the UE 206 may determine a plurality of frequency points based on the SAI belonging to the SAI list.
  • the UE 206 reports the correspondence between the service information of the MBMS service of interest and the multiple frequency points of the broadcast service to the eNB1, for example, ⁇ TMGI1-f2, f3 ⁇ .
  • the UE 206 is interested in a plurality of MBMS services, and the UE 206 reports the correspondence between the service information of each of the MBMS services of interest and the frequency of broadcasting the service to the eNB1.
  • UE 206 is interested in two MBMS services.
  • the two MBMS services respectively have TMGI1 and TMGI2, and according to the SAI, the TMGI1 corresponds to the frequency point f1, and the TMGI2 corresponds to the frequency point f2. Therefore, the UE 206 reports ⁇ TMGI1-f1 ⁇ and ⁇ TMGI2-f2 ⁇ to the eNB1.
  • eNB2 and eNB3 broadcast traffic on frequencies f1 and f2, for example, eNB2 broadcasts traffic with TMGI1 on frequency f1, and broadcasts traffic with TMGI2 on frequency f2, while eNB3 is at frequencies f1 and f2 Broadcast the service with TMGI2.
  • Existing technology The eNB1 only broadcasts the frequency points f1 and f2, and the eNB3 broadcasts only a part of the MBMS service that the UE is interested in at the frequencies f1 and f2, which destroys the service continuity with TMGI1.
  • eNB2 and eNB3 report the second information ⁇ TMGI1-f1, TMGI2-f2 ⁇ and ⁇ TMGI2-f1, f2 ⁇ , respectively. Therefore, the eNB1 can determine that the eNB2 is broadcasting all the services of interest to the UE according to the information reported by the UE and the neighboring base station, and accordingly, the UE is handed over to the eNB2 to ensure the continuity of all the services of interest of the UE.
  • FIG. 4 is a flowchart of a method for communicating an MBMS according to an embodiment of the present invention, which is performed by a base station (such as eNB1) of a current cell.
  • a base station such as eNB1
  • Figure 4 will be described in conjunction with Figures 3A and 3B.
  • the first base station acquires the first information reported by the UE, where the first information includes a correspondence between the service information of the MBMS that is interested in the UE and the frequency of broadcasting the service.
  • the first base station acquires the second information reported by the multiple neighboring base stations of the first base station, and the second information reported by each neighboring base station includes the MBMS service information broadcasted by the neighboring base station and the broadcast The correspondence between the frequency of the service.
  • the first base station selects a second base station from the multiple neighboring base stations according to the first information and the second information, and switches the UE to the second base station.
  • the second base station broadcasts a first quantity of MBMSs that are of interest to the UE, where the first quantity is not less than any other neighbors of the multiple neighboring base stations except the second base station.
  • the zone base station broadcasts the number of MBMSs of interest to the UE.
  • the serving base station selects a target base station that can broadcast the service of interest to the UE according to the first information reported by the UE and the second information reported by the neighboring base station, and ensures continuity of the MBMS service that the UE is interested in during the handover process. Sex.
  • FIG. 5A to FIG. 5E illustrate a specific manner in which a neighboring cell base station (eg, eNB 2) reports second information according to an embodiment of the present invention.
  • a neighboring cell base station eg, eNB 2
  • information interworking between neighboring eNBs is implemented by enhancing an eNB configuration update procedure of an existing X2 interface.
  • the eNB configuration update request message sent by the eNB2 to the eNB1 carries the second information, that is, the eNB configuration update request message carries the service broadcast by the neighboring cell eNB and its corresponding frequency point message. interest.
  • the eNB1 replies with an eNB configuration update response (eNB configuration update response) message to the eNB2.
  • information interworking between adjacent eNBs is implemented by defining a new X2 interface modification procedure (X2modify procedure).
  • X2modify procedure For example, the X2 modify request message sent by the eNB2 to the eNB1 carries the second information, that is, the X2 modification request message carries the service broadcast by the neighboring cell eNB and its corresponding frequency point information.
  • the eNB1 replies to the eNB2 with an X2 update response (X2update response) message.
  • related information between neighboring eNBs is indirectly interacted by scheduling MCEs of the eNB.
  • the base stations of the neighboring cells such as eNB1 and eNB2
  • the eNB2 and the MCE can implement the neighboring process through an M2 interface process, such as an M2 interface setup procedure.
  • Information exchange between eNBs is not limited thereto, and other specific procedures of the M2 interface may be employed to implement information interworking between eNBs.
  • the M2 interface setup request (M2setup request) message sent by the eNB2 to the MCE carries the second information, that is, the M2 interface setup request message carries the service broadcast by the neighboring cell eNB and its corresponding frequency point information.
  • the MCE replies to the eNB2 with an M2 interface setup response (M2setup response) message.
  • the MCE can send the second information to the eNB1 through the MBMS scheduling information flow.
  • the MBMS scheduling information (MBMS scheduling information) sent by the MCE to the eNB1 carries the second information.
  • the eNB1 replies to the MCE with an MBMS scheduling information response message.
  • the base stations of the neighboring cells (such as eNB1 and eNB2) are in different areas, and therefore are managed by different MCEs, and the eNBs can indirectly implement the eNB by the interaction between different MCEs. Inter-information. Since there is no direct interface connection between the MCEs, the interaction between the MCEs needs to be forwarded indirectly through the MME that connects the MCEs.
  • the M2 interface setup request message sent by the eNB2 to the MCE2 carries the second information, that is, the M2 interface setup request message carries the service broadcast by the neighboring cell eNB and its corresponding frequency point information.
  • MCE2 confirms that the M2 interface is established. After the request message, the M2 interface setup response message is replied to the eNB2.
  • the information interaction between the MCE2 and the MME can adopt an M3 interface process, for example, an M3 interface setup procedure.
  • the MCE2 sends an M3 setup request (M3setup request) message to the MME, where the M3 setup request message carries the second information.
  • M3 setup request message carries the second information.
  • the MME After confirming that the M3 setup request message is received, the MME returns an M3 setup response (M3setup response) message to the MCE2.
  • the information exchange between the MME and the MCE1 may adopt a reset procedure initiated by the MME.
  • the MME sends a reset message to the MCE1 through the M3 interface, where the reset message carries the second information.
  • MCE1 replies with an M3 reset acknowledge message to the MME.
  • the MCE1 can send the second information to the eNB1 through the MBMS scheduling information flow.
  • the MBMS scheduling information sent by the MCE1 to the eNB1 carries the second information.
  • the eNB1 replies to the MCE with an MBMS scheduling information response message.
  • the second information needs to be forwarded between the MMEs through the S10 interface between the MMEs, and details are not described herein.
  • information exchange between adjacent eNBs is implemented through a handover procedure of the X2 interface.
  • the eNB1 sends a handover request message to the eNB2 through the X2 interface, where the handover request message includes indication information for instructing the eNB2 to report the second information to the eNB1.
  • the eNB2 replies to the eNB1 with a handover response message according to the indication information, where the handover response message includes the second information, that is, the service that the eNB2 broadcasts by itself through the handover response message and its corresponding The frequency information is reported to the eNB1.
  • FIG. 6 is a flowchart of a method performed by a UE according to an MBMS communication method according to an embodiment of the present invention. Figure 6 will be described in conjunction with Figures 3A and 3B.
  • the UE reports the first information to the first base station, so that the first base station selects the second base station from the multiple neighboring base stations according to the first information and the second information reported by the multiple neighboring base stations. .
  • the UE transmits an MBMS interest indication message carrying the first information to the eNB1.
  • the first information includes a correspondence between the service information of the MBMS that is interested in the UE and the frequency of broadcasting the service.
  • each The second information reported by the neighboring cell base station includes a correspondence between the MBMS service information broadcast by the neighboring cell base station and the frequency of broadcasting the service. Therefore, the eNB1 selects a second base station, such as eNB2, from the plurality of neighboring base stations according to the first information and the second information reported by the plurality of neighboring base stations.
  • the UE receives a handover instruction sent by the first base station, to switch to the second base station according to the handover instruction.
  • the second base station broadcasts a first quantity of MBMSs that are of interest to the UE, where the first quantity is not less than any other neighbors of the multiple neighboring base stations except the second base station.
  • the zone base station broadcasts the number of MBMSs of interest to the UE.
  • the eNB1 determines, by using the first information and the second information, that the eNB2 can broadcast all MBMSs of interest to the UE, and then switches the UE to the eNB2.
  • the serving base station selects a target base station that can broadcast the service of interest to the UE according to the first information reported by the UE and the second information reported by the neighboring base station, and ensures continuity of the MBMS service that the UE is interested in during the handover process. Sex.
  • FIG. 7A and FIG. 7B are flowcharts executed by a neighboring cell base station (such as eNB2) according to an MBMS communication method according to an embodiment of the present invention.
  • a neighboring cell base station such as eNB2
  • FIG. 7A will be described in conjunction with FIG. 5A to FIG. 5D
  • FIG. 7B will be described in conjunction with FIG. 5E, and details are not described herein again.
  • the method includes:
  • the second base station sends a request message carrying the second information to the first base station serving the UE, so that the first base station selects a target service for the handover according to the first information and the second information reported by the UE.
  • Base station
  • the first information includes a correspondence between the service information of the MBMS that the UE is interested in and the frequency of broadcasting the service; the second information includes the MBMS service information and the broadcast broadcast by the second base station. The correspondence between the frequency points of the service.
  • the request message includes a base station configuration update request message, as shown in FIG. 5A.
  • the request message includes an X2 interface modification request message, as shown in Figure 5B.
  • the S701a specifically includes: the second base station sends the bearer to the MCE.
  • the M2 setup request message with the second information so that the MCE sends an MBMS scheduling information message to the first base station according to the M2 setup request message, as shown in FIG. 5C or FIG. 5D.
  • the MBMS scheduling information message carries the second information.
  • the second base station receives a response message that is sent by the first base station according to the request message.
  • the method includes:
  • the second base station receives the X2 interface switching request message sent by the first base station of the serving user equipment UE, where the handover request message includes indication information for indicating that the second base station reports the second information to the first base station.
  • the second base station sends, according to the indication information, a handover response message carrying the second information to the first base station, so that the first base station is configured according to the first information and the second information reported by the UE.
  • the target serving base station for handover is selected for the UE.
  • the first information includes a correspondence between the service information of the MBMS that the UE is interested in and the frequency of broadcasting the service; the second information includes the MBMS service information and the broadcast broadcast by the second base station. The correspondence between the frequency points of the service.
  • the serving base station selects a target base station that can broadcast the service of interest to the UE according to the first information reported by the UE and the second information reported by the neighboring base station, and ensures continuity of the MBMS service that the UE is interested in during the handover process. Sex.
  • FIG. 8 is a schematic diagram of a serving base station 800 according to an embodiment of the present invention.
  • the serving base station 800 in Figure 8 can be used to perform the functions of eNB1 in Figures 3A through 5E.
  • base station 800 includes a receiver 802 and a processor 804.
  • the receiver 802 is configured to acquire the first information reported by the UE, where the first information includes a correspondence between the service information of the MBMS that is of interest to the UE and the frequency of broadcasting the service, where the service information is used to indicate The type of business.
  • the receiver 802 is further configured to acquire second information reported by the neighboring base stations of the base station, where the second information reported by each neighboring base station includes MBMS service information and a broadcast station broadcast by the neighboring base station. The correspondence between the frequency points of the service.
  • the processor 804 is configured to select a second base station from the multiple neighboring base stations according to the first information and the second information, and switch the UE to the second base station.
  • the serving base station selects a target base station that can broadcast the service of interest to the UE according to the first information reported by the UE and the second information reported by the neighboring base station, and ensures continuity of the MBMS service that the UE is interested in during the handover process. Sex.
  • the second base station broadcasts a first quantity of MBMSs that are of interest to the UE, where the first quantity is not less than any other neighbors of the multiple neighboring base stations except the second base station.
  • the zone base station broadcasts the number of MBMSs of interest to the UE.
  • the receiver 802 is configured to receive an MBMS interest indication message sent by the UE, where the MBMS interest indication message carries the first information.
  • the receiver 802 is configured to receive a base station configuration update request message sent by each neighboring base station, where the base station configuration update request message carries the second information; or, the receiver 802 is configured to receive, sent by each neighboring base station.
  • the X2 interface modification request message carries the second information; or the receiver 802 is configured to receive the MBMS scheduling information message sent by the MCE, where the MBMS scheduling information message carries the second information.
  • the MBMS scheduling information message is sent by the MCE to the base station according to an M2 interface setup request message received from a neighboring cell base station, where the M2 interface setup request message carries the second information; or
  • the MBMS scheduling information message is sent by the MCE to the base station according to the M3 interface reset message received from the MME, and the M3 interface reset message carries the second information.
  • the base station 800 further includes a transmitter, where the transmitter is configured to send an X2 interface switching request message to each neighboring base station.
  • the handover request message includes indication information for indicating that the neighboring base station reports the second information to the base station.
  • the receiver 802 is configured to receive a handover response message that is sent by each neighboring cell base station according to the indication information, where the handover response message carries the second information.
  • FIG. 9 is a schematic diagram of a UE 900 according to an embodiment of the present invention.
  • the UE 900 of Figure 9 can be used to perform the functions of the UE 206 of Figures 3A-6.
  • the UE 900 includes a transmitter 902 and a receiver 904.
  • the transmitter 902 is configured to report the first information to the first base station, so that the first base station selects the first neighboring base station according to the first information and the second information reported by the multiple neighboring base stations. Two base stations.
  • the receiver 904 is configured to receive a handover instruction sent by the first base station to switch to the second base station according to the handover instruction.
  • the first information includes a correspondence between the service information of the MBMS that is of interest to the UE and the frequency of broadcasting the service, where the service information is used to indicate the type of the service; each neighboring base station
  • the reported second information includes a correspondence between the MBMS service information broadcast by the neighboring base station and the frequency of broadcasting the service.
  • the serving base station selects a target base station that can broadcast the service of interest to the UE according to the first information reported by the UE and the second information reported by the neighboring base station, and ensures continuity of the MBMS service that the UE is interested in during the handover process. Sex.
  • the second base station broadcasts a first quantity of MBMSs that are of interest to the UE, where the first quantity is not less than any other neighbors of the multiple neighboring base stations except the second base station.
  • the zone base station broadcasts the number of MBMSs of interest to the UE.
  • the transmitter 902 is configured to send an MBMS interest indication message to the first base station, where the MBMS interest indication message carries the first information.
  • FIGS. 5A through 5D and FIG. 7A are schematic diagrams of a neighbor cell base station provided in accordance with the present invention.
  • the neighbor base station 1000 in FIG. 10A can be used to perform the functions of the second base station (e.g., eNB2) in FIGS. 5A through 5D and FIG. 7A.
  • the second base station 1000 includes a transmitter 1002 and a receiver 1004.
  • the transmitter 1002 is configured to send, to the first base station serving the UE, a request message that carries the second information, so that the first base station selects a target service for the handover according to the first information and the second information reported by the UE. Base station.
  • the receiver 1004 is configured to receive a response message that is sent by the first base station according to the request message, where the first information includes a service information between an MBMS that is of interest to the UE and a frequency of broadcasting the service.
  • the service information is used to indicate a type of the service;
  • the second information includes a correspondence between MBMS service information broadcasted by the base station and a frequency point of broadcasting the service.
  • the request message includes a base station configuration update request message; or the request message includes an X2 interface modification request message.
  • the transmitter 1002 is configured to send, to the MCE, an M2 setup request message that carries the second information, so that the MCE sends an MBMS scheduling information message to the first base station according to the M2 setup request message, where The MBMS scheduling information message carries the second information.
  • the neighbor base station 1001 in FIG. 10B can be used to perform the second base station in FIG. 5E and FIG. 7B.
  • the second base station 1001 includes a receiver 1003 and a transmitter 1005.
  • the receiver 1003 is configured to receive an X2 interface switching request message sent by the first base station of the serving user equipment UE, where the handover request message includes indication information for instructing the base station to report the second information to the first base station.
  • the transmitter 1005 is configured to send, according to the indication information, a handover response message carrying the second information to the first base station, so that the first base station is configured according to the first information and the second information reported by the UE.
  • the target serving base station for handover is selected for the UE.
  • the first information includes a correspondence between the service information of the multimedia broadcast/multicast service MBMS that is of interest to the UE and the frequency of broadcasting the service, where the service information is used to indicate the type of the service.
  • the second information includes a correspondence between MBMS service information broadcast by the base station and a frequency point of broadcasting the service.
  • the serving base station selects a target base station that can broadcast the service of interest to the UE according to the first information reported by the UE and the second information reported by the neighboring base station, and ensures continuity of the MBMS service that the UE is interested in during the handover process. Sex.
  • FIG. 11A and 11B are schematic views of a communication system provided in accordance with the present invention.
  • communication system 1100 includes a serving base station 800, a UE 900, and a neighbor base station 1000.
  • the communication system 1101 includes a serving base station 800, a UE 900, and a neighbor base station 1001. The operations of the base stations 800, 1000, 1001 and the UE 900 are not described herein.
  • the disclosed method and apparatus may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of cells is only a logical function division.
  • multiple units or components may be combined or integrated. Go to another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the software functional units described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform portions of the steps of various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, and the program code can be stored. Medium.

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Abstract

本发明提供一种MBMS的通信方法、基站、UE和系统。该方法包括：第一基站获取UE上报的第一信息，该第一信息包括UE感兴趣的MBMS的业务信息与广播业务的频点之间的对应关系；获取邻区基站上报的第二信息，每个邻区基站上报的第二信息包括邻区基站广播的MBMS业务信息与广播业务的频点之间的对应关系；根据第一信息和第二信息从邻区基站中选出第二基站，将UE切换至第二基站。本发明保证了UE感兴趣的MBMS的连续性。

Description

一种多媒体广播/多播业务MBMS的通信方法、基站及用户设备 技术领域
本发明涉及通信领域，尤其涉及一种多媒体广播/多播业务MBMS的通信方法、基站及用户设备。
背景技术
多媒体广播/多播业务(Multimedia Broadcast/Multicast Service，MBMS)是3GPP Release 6版本中引入的一项功能，是手机电视业务的基石。MBMS支持多媒体广播业务和组播业务两种模式，既可以将多媒体视频信息直接向所有用户广播，也可以发送给一组收费的签约用户收看，可以帮助运营商开展多媒体广告、免费和收费电视频道、彩信群发等多种商业应用，从而使得运营商以较低的网络部署成本就可开展手机电视业务。
现有技术中，当用户设备(User Equipment，UE)在组播广播单频网(Multicast Broadcast Single Frequency Network，MBSFN)区域间或区域内移动过程中，为了保证UE能够正常接收MBMS业务，执行如下步骤，如图1所示：
步骤1：演进型通用陆地无线接入网(Evolved Universal Terrestrial Radio Access Network，E-UTRAN)在系统广播消息SIB15中广播该E-UTRAN对应小区的MBMS服务区标识(Service Area Identity，SAI)信息及其对应小区的系统频率，同时还通过SIB15广播该E-UTRAN相邻小区的MBMS SAI信息及其相邻小区的系统频率。也就是说，SIB15中广播的是SAI列表(SAI list)、频率列表(Frequency list)以及SAI和Frequency的对应关系。
步骤2：UE收听E-UTRAN广播的SIB15，并判断UE自己保存的用户业务描述(User Service Description，USD)中的SAI是否是SIB15广播的SAI list中的SAI。如果是，则UE读取SIB15中该SAI对应的系统频率，并向E-UTRAN发送MBMS兴趣指示消息(MBMS Interest Indication)，该消息中包含上述的UE感兴趣的SAI对应的系统频率。E-UTRAN据此判断该系统频率对应的SAI，并将该UE切换到该SAI对应的邻区E-UTRAN。
然而，由于不同的基站会在同一频点(即相同的系统频率)上广播不同的MBMS业务，E-UTRAN根据频点切换UE时，可能将UE切换到在该频点上并不广播UE感兴趣的业务的基站，从而导致UE感兴趣的业务会被中断，影响了用户体验。
发明内容
本发明的实施例提供一种MBMS的通信方法、基站及通信系统，能够保证UE感兴趣的MBMS的连续性，提高用户体验。
第一方面，提供一种MBMS的通信方法，所述方法包括：
第一基站获取用户设备UE上报的第一信息，所述第一信息包括所述UE感兴趣的MBMS的业务信息与广播所述业务的频点之间的对应关系，所述MBMS业务信息用于表示所述MBMS业务的类型；
所述第一基站获取所述第一基站的多个邻区基站上报的第二信息，每个邻区基站上报的所述第二信息包括所述邻区基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系；及
所述第一基站根据所述第一信息和所述第二信息从所述多个邻区基站中选出第二基站，将所述UE切换至所述第二基站。
结合第一方面，在第一种可能的实现方式中，所述第二基站广播第一数量的所述UE感兴趣的MBMS，所述第一数量不少于所述多个邻区基站中除所述第二基站外的其他任一邻区基站广播所述UE感兴趣的MBMS的数量。
第二方面，提供了一种MBMS的通信方法，所述方法包括：
用户设备UE向第一基站上报第一信息，以使所述第一基站根据所述第一信息和多个邻区基站上报的第二信息从所述多个邻区基站中选出第二基站；及
所述UE接收所述第一基站发送的切换指令，以根据所述切换指令切换至所述第二基站；
其中，所述第一信息包括所述UE感兴趣的MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述 业务的类型；每个邻区基站上报的所述第二信息包括所述邻区基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
结合第二方面，在第一种可能的实现方式中，所述第二基站广播第一数量的所述UE感兴趣的MBMS，所述第一数量不少于所述多个邻区基站中除所述第二基站外的其他任一邻区基站广播所述UE感兴趣的MBMS的数量。
第三方面，提供了一种MBMS的通信方法，所述方法包括：
第二基站向服务用户设备UE的第一基站发送携带第二信息的请求消息，以使所述第一基站根据所述UE上报的第一信息和所述第二信息为UE选择切换的目标服务基站；及
所述第二基站接收所述第一基站根据所述请求消息发送的响应消息；
其中，所述第一信息包括所述UE感兴趣的MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述业务的类型；所述第二信息包括所述第二基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
第四方面，提供了一种MBMS的通信方法，所述方法包括：
第二基站接收服务用户设备UE的第一基站发送的X2接口切换请求消息，所述切换请求消息中包括用于指示所述第二基站上报第二信息至所述第一基站的指示信息；及
所述第二基站根据所述指示信息向所述第一基站发送携带所述第二信息的切换响应消息，以使所述第一基站根据所述UE上报的第一信息和所述第二信息为UE选择切换的目标服务基站；
其中，所述第一信息包括所述UE感兴趣的MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述业务的类型；所述第二信息包括所述第二基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
第五方面，提供了一种基站，包括：
接收器，用于获取用户设备UE上报的第一信息，所述第一信息 包括所述UE感兴趣的多媒体广播/多播业务MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述业务的类型；
所述接收器还用于获取所述基站的多个邻区基站上报的第二信息，每个邻区基站上报的所述第二信息包括所述邻区基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系；及
处理器，用于根据所述第一信息和所述第二信息从所述多个邻区基站中选出第二基站，将所述UE切换至所述第二基站。
结合第五方面，在第一种可能的实现方式中，所述第二基站广播第一数量的所述UE感兴趣的MBMS，所述第一数量不少于所述多个邻区基站中除所述第二基站外的其他任一邻区基站广播所述UE感兴趣的MBMS的数量。
第六方面，提供了一种UE，包括：
发送器，用于向第一基站上报第一信息，以使所述第一基站根据所述第一信息和多个邻区基站上报的第二信息从所述多个邻区基站中选出第二基站；及
接收器，用于接收所述第一基站发送的切换指令，以根据所述切换指令切换至所述第二基站；
其中，所述第一信息包括所述UE感兴趣的多媒体广播/多播业务MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述业务的类型；每个邻区基站上报的所述第二信息包括所述邻区基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
结合第六方面，在第一种可能的实现方式中，所述第二基站广播第一数量的所述UE感兴趣的MBMS，所述第一数量不少于所述多个邻区基站中除所述第二基站外的其他任一邻区基站广播所述UE感兴趣的MBMS的数量。
第七方面，提供了一种基站，包括：
发送器，用于向服务用户设备UE的第一基站发送携带第二信息的请求消息，以使所述第一基站根据所述UE上报的第一信息和所述 第二信息为UE选择切换的目标服务基站；及
接收器，用于接收所述第一基站根据所述请求消息发送的响应消息；
其中，所述第一信息包括所述UE感兴趣的多媒体广播/多播业务MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述业务的类型；所述第二信息包括所述基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
第八方面，提供了一种基站，包括：
接收器，用于接收服务用户设备UE的第一基站发送的X2接口切换请求消息，所述切换请求消息中包括用于指示所述基站上报第二信息至所述第一基站的指示信息；及
发送器，用于根据所述指示信息向所述第一基站发送携带所述第二信息的切换响应消息，以使所述第一基站根据所述UE上报的第一信息和所述第二信息为UE选择切换的目标服务基站；
其中，所述第一信息包括所述UE感兴趣的多媒体广播/多播业务MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述业务的类型；所述第二信息包括所述基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
本发明提供一种MBMS的通信方法、基站及UE，第一基站获取UE上报的第一信息，该第一信息包括UE感兴趣的MBMS的业务信息与广播业务的频点之间的对应关系；获取邻区基站上报的第二信息，每个邻区基站上报的第二信息包括邻区基站广播的MBMS业务信息与广播业务的频点之间的对应关系；根据第一信息和第二信息从邻区基站中选出第二基站，将UE切换至第二基站。通过该方法，在为UE服务的eNB做切换选择前，需要考虑UE感兴趣的MBMS业务的业务信息与广播所述业务的频点之间的对应关系，同时需要考虑邻区eNB自己广播的业务及其对应的频点信息，并根据两者匹配的结果将UE切换至合适的目标服务eNB，从而保证了UE在切换过程中感兴趣的MBMS业务的连续性，提高用户体验。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1所示为现有技术中MBMS通信方法的示意图；
图2为LTE网络中MBMS的逻辑架构图；
图3A为根据本发明实施例提供的E-UTRAN的示意图；
图3B为根据本发明实施例提供的一种MBMS通信方法的信令交互示意图；
图4所示为根据本发明实施例提供的一种MBMS通信方法的由服务基站执行的流程图；
图5A至图5E为根据本发明实施例提供的从邻区基站获取第二信息的示意图；
图6所示为根据本发明实施例提供的一种MBMS通信方法的由UE执行的流程图；
图7A和图7B所示为根据本发明实施例提供的一种MBMS通信方法的由邻区基站执行的流程图；
图8所示为根据本发明实施例提供的服务基站的示意图；
图9所示为根据本发明实施例提供的UE的示意图；
图10A和图10B所示为根据本发明提供的邻区基站的示意图；及
图11A和11B图所示为根据本发明提供的通信系统的示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部 分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
图2所示为长期演进(long term evolution，LTE)网络中MBMS的逻辑架构图。如图2所示，MBMS框架200包括如下网元：广播多播业务中心(Broadcast-Multicast Service Centre，BM-SC)201、MBMS网关(MBMS Gateway，MBMS-GW)202、移动性管理网元(Mobility Management Entity，MME)203、多小区/多播协调功能实体(Multi-cell/multicast Coordination Entity，MCE)204以及演进型通用陆地无线接入网(Evolved Universal Terrestrial Radio Access Network，E-UTRAN)205。
其中，BM-SC 201属于业务层网元，是内容提供者的入口，用于提供业务的汇聚和发送、用户的授权(密钥的产生和发送)、MBMS承载的建立和发起、会话控制等。BM-SC 201同时还可以实现与E-UTRAN205之间的同步。
MBMS-GW 202作为BM-SC 201和E-UTRAN 205之间的一个节点，是网络的接入网关，用于负责处理用户数据相关的报文和会话相关的信令。
MME 203是控制面网元节点，主要参与MBMS的会话控制管理。
对于单个MBMS，MCE 204主要用于业务的调度，即分配合适的资源(包括频率、时间等参数)，进行多媒体广播多播单频网(Multicast Broadcast Single Frequency Network，MBSFN)传输。对于多个MBMS业务，MCE 204需要协调其相应的多个MBSFN传输，包括MBSFN区域的大小、无线资源的使用等，以便能够合理的、高效的使用资源。
其中，MBSFN传输是MBMS的一种同步传输方式。每个MBMS服务区可覆盖多个MBSFN区域，每个MBMS服务区对应一个SAI。每个MBSFN区域又可覆盖多个eNB，因此，每个eNB可对应一个或多个SAI。此外，由于每个eNB也可同时被多个MBSFN区域覆盖，而每个MBSFN area采用一个频率来同步传输数据，即，每个MBSFN area对应一个系统频点。因此，每个eNB可对应一个或多个频点。
在图3A的实施例中，E-UTRAN 205包括服务基站eNB1以及邻区 基站，例如，eNB2和eNB3。其中，eNB1被MBSFN第一区域(MBSFN area 1)覆盖，eNB2被MBSFN第二区域(MBSFN area 2)覆盖，eNB3被MBSFN第三区域(MBSFN area 3)覆盖。然而，本发明并不限于此，在其他实施例中，任意eNB可被多个MBSFN区域覆盖。
其中，eNB1内配置有本站的配置信息及邻区基站的配置信息，该配置信息包括基站对应的的SAI与频点。例如，eNB1的配置信息或邻区基站的配置信息可如以下形式任一：{SAI1—f1}、{SAI1,SAI2—f1}、{SAI1—f1,f1}或{SAI1,SAI2—f1,f1}。{SAI1—f1}表示该基站与一个SAI(即SAI1)对应，并与一个频点(即f1)对应；{SAI1,SAI2—f1}表示该基站与多个SAI(即SAI1和SAI2)对应，并与一个频点(即f1)对应；{SAI1—f1,f1}表示该基站与一个SAI(即SAI1)对应，并与多个频点(即f1和f2)对应；{SAI1,SAI2—f1,f1}表示该基站与多个SAI(即SAI1和SAI2)对应，并与多个频点(即f1和f2)对应。
图3B所示为根据本发明一个实施例的MBMS通信方法的信令交互图。图3B将结合图3A进行描述。该方法适用于UE 206的切换过程，具体包括如下步骤：
S301，当前小区的服务基站eNB1通过系统广播消息SIB15向UE206广播该基站及邻区基站的配置信息。配置信息包括eNB1、eNB2
和eNB3的SAI列表、频点列表以及各基站的SAI与频点之间的对应关系。例如，eNB1对应SAI1和f1，eNB2对应SAI2和f2，eNB3对应SAI3和f2。eNB1通过系统广播消息SIB15向UE 206广播SAI列
表{SAI1，SAI2，SAI3}、频点列表{f1，f2}，且SAI和频点的对应关系为{SAI1—f1；SAI2—f2；SAI3—f2}。
S302，UE 206判断其保存的SAI是否属于eNB1广播的频率列表中的SAI。
例如，UE 206保存的USD包括有临时移动群组标识(Temporary Mobile Group Identity，TMGI)和一个或多个SAI的对应关系。TMGI用于指示UE感兴趣的业务的类型。UE 206收听E-UTRAN广播的SIB15消息，并判断自己保存的USD中的SAI是否是SIB15广播的频率列表中的SAI。如果是，则UE 206读取SIB15消息中该SAI对应的频点。
具体的，在本实施例中，假设属于SAI列表的SAI只对应一个频点， UE206读取对应的一个频点。举例来说，假设UE对一个MBMS业务感兴趣，其USD中保存的对应关系是{TMGI1—SAI2}。UE收听到广播消息SIB15后，判断SAI2在SIB15的频率列表中，并根据对应关系获知SAI2对应的频点是f2。然而，本发明并不限于此，在其他实施例中，若属于SAI列表的SAI对应多个频点，或者，若UE 206保存的USD中的多个SAI属于频点列表，则UE 206需要读取SIB15消息中与SAI对应的所有频点。
S303，UE 206通过MBMS兴趣指示消息向eNB1上报第一信息，第一信息包括UE感兴趣的MBMS业务的业务信息与广播所述业务的频点之间的对应关系。也就是说，UE 206上报的MBMS兴趣指示消息中包含上述的SAI对应的频点，除此之外，MBMS兴趣指示消息中还包含UE感兴趣的MBMS业务的业务信息。业务信息用于指示UE感兴趣的MBMS业务的类型，例如，业务信息包括TMGI，或其他可以标识MBMS业务类型的标识。
例如，当UE 206确定SAI2对应的频点是f2后，向eNB1上报{TMGI1-f2}。这样，当前正在为UE服务的eNB1收到UE上报的MBMS兴趣指示消息后，就可以获知每个UE对哪些MBMS业务感兴趣以及这些感兴趣的业务会在哪些频点上广播。
S304，邻区基站(例如，eNB2和eNB3)向服务基站eNB1上报第二信息，第二信息包括邻区eNB自己广播的MBMS业务信息及其对应的频点信息。
例如，eNB2和eNB3都在频点f2上广播MBMS业务。具体来说，eNB2在频点f2上广播具有TMGI1的MBMS业务，而eNB3在频点f2上广播具有TMGI2的MBMS业务。因此，eNB2上报的自己广播的业务及其对应的频点信息是{TMGI1-f2}，而eNB3上报的自己广播的业务及其对应的频点信息是{TMGI2-f2}。
S305，eNB1根据UE上报的第一信息和邻区eNB上报的第二信息，为UE选择切换的目标服务eNB，并将UE切换至该目标服务eNB。
举例来说，UE上报的第一信息包括{TMGI1-f2}，eNB2上报的第二信息包括{TMGI1-f2}，eNB2上报的第二信息包括{TMGI2-f2}。因此，eNB1确定eNB2能够在频点f2上广播UE 206感兴趣的具有TMGI1的MBMS业务，并据此将UE 206切换至eNB2。
因此，当不同基站在同一频点上广播不同的业务时，现有技术中，UE仅上报属于SAI列表的SAI所对应的频点，例如频点f2。由于eNB2和eNB3都在频点f2上广播MBMS业务，而只有eNB2在频点f2上广播UE感兴趣的业务。若eNB1将UE切换至eNB3，由于eNB3在频点f2上并不广播UE感兴趣的业务，会导致UE感兴趣的业务被中断，影响用户体验。也就是说，若UE仅上报属于SAI列表的SAI所对应的频点，并不能保证将UE切换至广播UE感兴趣的业务的基站。本发明提供了一种保持MBMS的业务连续性的方法。通过该方法，在为UE服务的eNB做切换选择前，需要考虑UE感兴趣的MBMS业务的业务信息与广播所述业务的频点之间的对应关系，同时需要考虑邻区eNB自己广播的业务及其对应的频点信息，并根据两者匹配的结果将UE切换至合适的目标eNB，从而保证了UE在切换过程中感兴趣的MBMS业务的连续性。
可选地，eNB1可根据UE上报的第一信息和邻区eNB上报的第二信息，优先选择能够广播尽可能多的UE感兴趣的业务的eNB作为目标eNB，并将UE切换至该目标eNB。换句话说，选出的目标eNB广播第一数量的UE感兴趣的MBMS业务，该第一数量不少于多个邻区基站中除目标基站外的其他任一邻区基站广播UE感兴趣的MBMS的数量。
在另一个实施例中，UE206可根据属于SAI列表的SAI确定多个频点。UE 206将感兴趣的MBMS业务的业务信息与广播所述业务的多个频点之间的对应关系都上报给eNB1，例如{TMGI1-f2，f3}。
在又一个实施例中，UE206对多个MBMS业务感兴趣，UE 206将感兴趣的MBMS业务中每一个业务的业务信息与广播所述业务的频点之间的对应关系都上报给eNB1。例如，UE206对两个MBMS业务感兴趣。这两个MBMS业务分别具有TMGI1和TMGI2，根据SAI确定TMGI1对应频点f1，TMGI2对应频点f2。因此，UE 206向eNB1上报{TMGI1-f1}和{TMGI2-f2}。
当eNB2和eNB3都在频点f1和f2上广播业务时，例如，eNB2在频点f1上广播具有TMGI1的业务，并在频点f2上广播具有TMGI2的业务，而eNB3在频点f1和f2上广播具有TMGI2的业务。现有技 术，由于eNB1仅上报频点f1和f2，而eNB3仅在频点f1和f2上广播UE感兴趣的一部分MBMS业务，破坏了具有TMGI1的业务连续性。然而，采用本发明的方法，eNB2和eNB3分别上报第二信息{TMGI1-f1,TMGI2-f2}和{TMGI2-f1,f2}。因此，eNB1可根据UE和邻区基站上报的信息，确定eNB2正在广播UE所有感兴趣的业务，并据此将UE切换至eNB2，保证了UE所有感兴趣的业务的连续性。
图4所示为根据本发明实施例的MBMS的通信方法流程图，该方法由当前小区的基站(如eNB1)执行。图4将结合图3A和图3B进行描述。
S401，第一基站获取UE上报的第一信息，所述第一信息包括所述UE感兴趣的MBMS的业务信息与广播所述业务的频点之间的对应关系。
S402，第一基站获取所述第一基站的多个邻区基站上报的第二信息，每个邻区基站上报的所述第二信息包括所述邻区基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
S403，第一基站根据所述第一信息和所述第二信息从所述多个邻区基站中选出第二基站，将所述UE切换至所述第二基站。
可选地，所述第二基站广播第一数量的所述UE感兴趣的MBMS，所述第一数量不少于所述多个邻区基站中除所述第二基站外的其他任一邻区基站广播所述UE感兴趣的MBMS的数量。
因此，服务基站根据UE上报第一信息和邻区基站上报的第二信息为UE选出了一个能广播UE感兴趣的业务的目标基站，保证了UE在切换过程中感兴趣的MBMS业务的连续性。
图5A至图5E示出了根据本发明实施例的邻区基站(如，eNB2)上报第二信息的具体方式。
在图5A的实施例中，通过增强现有的X2接口的eNB配置更新步骤(Configuration Update procedure)来实现相邻eNB之间的信息互通。例如，eNB2向eNB1发送的eNB配置更新请求(eNB configuration update request)消息中携带上述第二信息，即eNB配置更新请求消息中携带邻区eNB自己广播的业务及其对应的频点信 息。eNB1确认收到配置更新请求消息后，向eNB2回复eNB配置更新响应(eNB configuration update response)消息。
在图5B的实施例中，通过定义新的X2接口修改流程(X2modify procedure)来实现相邻eNB之间的信息互通。例如，eNB2向eNB1发送的X2修改请求(X2modify request)消息中携带上述第二信息，即X2修改请求消息中携带邻区eNB自己广播的业务及其对应的频点信息。eNB1确认收到X2修改请求消息后，向eNB2回复X2修改响应(X2update response)消息。
在另一个实施例中，通过调度eNB的MCE来间接交互相邻eNB之间的相关信息。在图5C的实施例中，相邻小区的基站(如eNB1和eNB2)由相同的MCE调度管理，则eNB2和MCE可通过M2接口流程，如M2接口建立流程(M2setup procedure)，来实现相邻eNB之间的信息互通。然而，本发明并不限于此，也可采用M2接口的其他具体流程来实现eNB之间的信息互通。
在图5C的例子中，eNB2向MCE发送的M2接口建立请求(M2setup request)消息中携带上述第二信息，即M2接口建立请求消息中携带邻区eNB自己广播的业务及其对应的频点信息。MCE确认收到M2接口建立请求消息后，向eNB2回复M2接口建立响应(M2setup response)消息。
然后，MCE可通过MBMS调度信息流程将第二信息下发给eNB1。例如，MCE向eNB1发送的MBMS调度信息(MBMS scheduling information)中携带上述第二信息。eNB1确认收到MBMS调度信息后，向MCE回复MBMS调度信息响应消息。
在图5D的实施例中，相邻小区的基站(如eNB1和eNB2)在不同的区域，因此由不同的MCE调度管理，则eNB之间可间接通过不同的MCE之间的交互来实现eNB之间的信息互通。由于MCE之间没有直接的接口连接，因此MCE之间的交互需要通过连接MCE的MME来间接进行交互信息的转发。
在图5D中，同理，eNB2向MCE2发送的M2接口建立请求消息中携带上述第二信息，即M2接口建立请求消息中携带邻区eNB自己广播的业务及其对应的频点信息。MCE2确认收到M2接口建立 请求消息后，向eNB2回复M2接口建立响应消息。
MCE2和MME之间的信息交互可采用M3接口流程，例如，M3接口建立流程(M3setup procedure)。例如，MCE2向MME发送M3建立请求(M3setup request)消息，该M3建立请求消息携带上述第二信息。MME确认收到M3建立请求消息后，向MCE2回复M3建立响应(M3setup response)消息。
MME和MCE1之间的信息交互可采用MME发起的重置流程(reset procedure)。例如，MME通过M3接口向MCE1发送重置(reset)消息，该重置消息携带上述第二信息。MCE1确认收到重置消息后，向MME回复M3重置确认(reset acknowledge)消息。
最后，类似地，MCE1可通过MBMS调度信息流程将第二信息下发给eNB1。例如，MCE1向eNB1发送的MBMS调度信息中携带上述第二信息。eNB1确认收到MBMS调度信息后，向MCE回复MBMS调度信息响应消息。
在其他实施例中，若MCE1和MCE连接在不同的MME上，则需要通过MME之间的S10接口来在MME之间转发上述第二信息，在此不再赘述。
在图5E的实施例中，通过X2接口的切换流程来实现相邻eNB之间的信息互通。例如，eNB1通过X2接口向eNB2发送切换请求(handover request)消息，该切换请求消息中包括用于指示eNB2上报所述第二信息至eNB1的指示信息。eNB2确认收到切换请求消息后，根据该指示信息向eNB1回复切换响应(handover response)消息，该切换响应消息包括上述第二信息，即，eNB2通过切换响应消息将自己广播的业务及其对应的频点信息上报给eNB1。
图6所示为根据本发明实施例提供的一种MBMS通信方法的由UE执行的流程图。图6将结合图3A和图3B进行描述。
S601，UE向第一基站上报第一信息，以使所述第一基站根据所述第一信息和多个邻区基站上报的第二信息从所述多个邻区基站中选出第二基站。例如，UE通过向eNB1发送携带所述第一信息的MBMS兴趣指示消息。其中，所述第一信息包括所述UE感兴趣的MBMS的业务信息与广播所述业务的频点之间的对应关系。而每个 邻区基站上报的所述第二信息包括所述邻区基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。因此，eNB1根据所述第一信息和多个邻区基站上报的第二信息从所述多个邻区基站中选出第二基站，如eNB2。
S602，UE接收所述第一基站发送的切换指令，以根据所述切换指令切换至所述第二基站。
可选的，所述第二基站广播第一数量的所述UE感兴趣的MBMS，所述第一数量不少于所述多个邻区基站中除所述第二基站外的其他任一邻区基站广播所述UE感兴趣的MBMS的数量。例如，eNB1通过第一信息和第二信息确定eNB2能够广播UE感兴趣的所有MBMS，则将该UE切换至eNB2。
因此，服务基站根据UE上报第一信息和邻区基站上报的第二信息为UE选出了一个能广播UE感兴趣的业务的目标基站，保证了UE在切换过程中感兴趣的MBMS业务的连续性。
图7A和图7B所示为根据本发明实施例提供的一种MBMS通信方法的由邻区基站(如eNB2)执行的流程图。图7A将结合图5A至图5D来描述；图7B将结合图5E来描述，在此不再赘述。
在图7A的例子中，该方法包括：
S701a，第二基站向服务UE的第一基站发送携带第二信息的请求消息，以使所述第一基站根据所述UE上报的第一信息和所述第二信息为UE选择切换的目标服务基站。
其中，所述第一信息包括所述UE感兴趣的MBMS的业务信息与广播所述业务的频点之间的对应关系；所述第二信息包括所述第二基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
可选的，在一个实施例中，所述请求消息包括基站配置更新请求消息，如图5A所示。
在另一个实施例中，所述请求消息包括X2接口修改请求消息，如图5B所示。
在又一个实施例中，S701a具体包括：第二基站向MCE发送携 带所述第二信息的M2建立请求消息，以使所述MCE根据所述M2建立请求消息向所述第一基站发送MBMS调度信息消息，如图5C或图5D所示。所述MBMS调度信息消息携带所述第二信息。
S702a，第二基站接收所述第一基站根据所述请求消息发送的响应消息。
在图7B的例子中，该方法包括：
S701b，第二基站接收服务用户设备UE的第一基站发送的X2接口切换请求消息，所述切换请求消息中包括用于指示所述第二基站上报第二信息至所述第一基站的指示信息。
S702b，第二基站根据所述指示信息向所述第一基站发送携带所述第二信息的切换响应消息，以使所述第一基站根据所述UE上报的第一信息和所述第二信息为UE选择切换的目标服务基站。
其中，所述第一信息包括所述UE感兴趣的MBMS的业务信息与广播所述业务的频点之间的对应关系；所述第二信息包括所述第二基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
因此，服务基站根据UE上报第一信息和邻区基站上报的第二信息为UE选出了一个能广播UE感兴趣的业务的目标基站，保证了UE在切换过程中感兴趣的MBMS业务的连续性。
图8所示为根据本发明实施例提供的服务基站800的示意图。图8中的服务基站800可用于执行图3A至图5E中eNB1的功能。例如，基站800包括接收器802和处理器804。
接收器802用于获取UE上报的第一信息，所述第一信息包括所述UE感兴趣的MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述业务的类型。
所述接收器802还用于获取所述基站的多个邻区基站上报的第二信息，每个邻区基站上报的所述第二信息包括所述邻区基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
处理器804用于根据所述第一信息和所述第二信息从所述多个邻区基站中选出第二基站，将所述UE切换至所述第二基站。
因此，服务基站根据UE上报第一信息和邻区基站上报的第二信息为UE选出了一个能广播UE感兴趣的业务的目标基站，保证了UE在切换过程中感兴趣的MBMS业务的连续性。
可选的，所述第二基站广播第一数量的所述UE感兴趣的MBMS，所述第一数量不少于所述多个邻区基站中除所述第二基站外的其他任一邻区基站广播所述UE感兴趣的MBMS的数量。
例如，接收器802用于接收所述UE发送的MBMS兴趣指示消息，所述MBMS兴趣指示消息携带所述第一信息。
例如，接收器802用于接收每个邻区基站发送的基站配置更新请求消息，所述基站配置更新请求消息携带所述第二信息；或者，接收器802用于接收每个邻区基站发送的X2接口修改请求消息，所述X2接口修改请求消息携带所述第二信息；或者，接收器802用于接收MCE发送的MBMS调度信息消息，所述MBMS调度信息消息携带所述第二信息。其中，所述MBMS调度信息消息是所述MCE根据从邻区基站接收到的M2接口建立请求消息向所述基站发送的，所述M2接口建立请求消息携带所述第二信息；或者，所述MBMS调度信息消息是所述MCE根据从MME接收到的M3接口重置消息向所述基站发送的，所述M3接口重置消息携带所述第二信息。
可选的，基站800还包括发送器，所述发送器用于向每个邻区基站发送X2接口切换请求消息。所述切换请求消息中包括用于指示邻区基站上报所述第二信息至所述基站的指示信息。接收器802用于接收每个邻区基站根据所述指示信息发送的切换响应消息，所述切换响应消息携带所述第二信息。
图9所示为根据本发明实施例提供的UE 900的示意图。图9中的UE 900可用于执行图3A至图6中UE 206的功能。例如，UE 900包括发送器902和接收器904。
发送器902用于向第一基站上报第一信息，以使所述第一基站根据所述第一信息和多个邻区基站上报的第二信息从所述多个邻区基站中选出第二基站。
接收器904用于接收所述第一基站发送的切换指令，以根据所述切换指令切换至所述第二基站。
其中，所述第一信息包括所述UE感兴趣的MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述业务的类型；每个邻区基站上报的所述第二信息包括所述邻区基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
因此，服务基站根据UE上报第一信息和邻区基站上报的第二信息为UE选出了一个能广播UE感兴趣的业务的目标基站，保证了UE在切换过程中感兴趣的MBMS业务的连续性。
可选的，所述第二基站广播第一数量的所述UE感兴趣的MBMS，所述第一数量不少于所述多个邻区基站中除所述第二基站外的其他任一邻区基站广播所述UE感兴趣的MBMS的数量。
例如，发送器902用于向所述第一基站发送MBMS兴趣指示消息，所述MBMS兴趣指示消息携带所述第一信息。
图10A和图10B所示为根据本发明提供的邻区基站的示意图。图10A中的邻区基站1000可用于执行图5A至图5D及图7A中第二基站(如eNB2)的功能。例如，第二基站1000包括发送器1002和接收器1004。
发送器1002用于向服务UE的第一基站发送携带第二信息的请求消息，以使所述第一基站根据所述UE上报的第一信息和所述第二信息为UE选择切换的目标服务基站。
接收器1004用于接收所述第一基站根据所述请求消息发送的响应消息；其中，所述第一信息包括所述UE感兴趣的MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述业务的类型；所述第二信息包括所述基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
例如，所述请求消息包括基站配置更新请求消息；或者，所述请求消息包括X2接口修改请求消息。或者，所述发送器1002用于向MCE发送携带所述第二信息的M2建立请求消息，以使所述MCE根据所述M2建立请求消息向所述第一基站发送MBMS调度信息消息，所述MBMS调度信息消息携带所述第二信息。
图10B中的邻区基站1001可用于执行图5E及图7B中第二基站 的功能。例如，第二基站1001包括接收器1003和发送器1005。
接收器1003用于接收服务用户设备UE的第一基站发送的X2接口切换请求消息，所述切换请求消息中包括用于指示所述基站上报第二信息至所述第一基站的指示信息。
发送器1005用于根据所述指示信息向所述第一基站发送携带所述第二信息的切换响应消息，以使所述第一基站根据所述UE上报的第一信息和所述第二信息为UE选择切换的目标服务基站。
其中，所述第一信息包括所述UE感兴趣的多媒体广播/多播业务MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述业务的类型；所述第二信息包括所述基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
因此，服务基站根据UE上报第一信息和邻区基站上报的第二信息为UE选出了一个能广播UE感兴趣的业务的目标基站，保证了UE在切换过程中感兴趣的MBMS业务的连续性。
图11A和11B图为根据本发明提供的通信系统的示意图。在图11A中，通信系统1100包括服务基站800、UE900和邻区基站1000。在图11B中，通信系统1101包括服务基站800、UE900和邻区基站1001。其中，基站800、1000、1001及UE900的操作不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的方法和设备，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理包括，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元，可以存储在一个计算机可读取存储介质中。上述软件功能单元存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例方法的部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，简称ROM)、随机存取存储器(Random Access Memory，简称RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (42)

  1. 一种多媒体广播/多播业务MBMS的通信方法，其特征在于，包括：
    第一基站获取用户设备UE上报的第一信息，所述第一信息包括所述UE感兴趣的MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述业务的类型；
    所述第一基站获取所述第一基站的多个邻区基站上报的第二信息，每个邻区基站上报的所述第二信息包括所述邻区基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系；及
    所述第一基站根据所述第一信息和所述第二信息从所述多个邻区基站中选出第二基站，将所述UE切换至所述第二基站。
  2. 根据权利要求1所述的方法，其特征在于，所述第二基站广播第一数量的所述UE感兴趣的MBMS，所述第一数量不少于所述多个邻区基站中除所述第二基站外的其他任一邻区基站广播所述UE感兴趣的MBMS的数量。
  3. 根据权利要求1或2所述的方法，其特征在于，所述，第一基站获取用户设备UE上报的第一信息，包括：
    所述第一基站接收所述UE发送的MBMS兴趣指示消息，所述MBMS兴趣指示消息携带所述第一信息。
  4. 根据权利要求1至3任一所述的方法，其特征在于，所述业务信息包括临时移动群组标识TMGI。
  5. 根据权利要求1至4任一所述的方法，其特征在于，所述第一基站获取所述第一基站的多个邻区基站上报的第二信息，包括：
    所述第一基站接收每个邻区基站发送的基站配置更新请求消息，所述基站配置更新请求消息携带所述第二信息。
  6. 根据权利要求1至4任一所述的方法，其特征在于，所述第一基站获取所述第一基站的多个邻区基站上报的第二信息，包括：
    所述第一基站接收每个邻区基站发送的X2接口修改请求消息，所述X2接口修改请求消息携带所述第二信息。
  7. 根据权利要求1至4任一所述的方法，其特征在于，所述第一基站获取所述第一基站的多个邻区基站上报的第二信息，包括：
    所述第一基站接收多小区/多播协同节点MCE发送的MBMS调度信息消息，所述MBMS调度信息消息携带所述第二信息。
  8. 根据权利要求7所述的方法，其特征在于，所述MBMS调度信息消息是所述MCE根据从邻区基站接收到的M2接口建立请求消息向所述第一基站发送的，所述M2接口建立请求消息携带所述第二信息。
  9. 根据权利要求7所述的方法，其特征在于，所述MBMS调度信息消息是所述MCE根据从MME接收到的M3接口重置消息向所述第一基站发送的，所述M3接口重置消息携带所述第二信息。
  10. 根据权利要求1至4任一所述的方法，其特征在于，所述第一基站获取所述第一基站的多个邻区基站上报的第二信息，包括：
    所述第一基站向每个邻区基站发送X2接口切换请求消息，所述切换请求消息中包括用于指示邻区基站上报所述第二信息至所述第一基站的指示信息；
    所述第一基站接收每个邻区基站根据所述指示信息发送的切换响应消息，所述切换响应消息携带所述第二信息。
  11. 一种多媒体广播/多播业务MBMS的通信方法，其特征在于，包括：
    用户设备UE向第一基站上报第一信息，以使所述第一基站根据所述第一信息和多个邻区基站上报的第二信息从所述多个邻区基站中选出第二基站；及
    所述UE接收所述第一基站发送的切换指令，以根据所述切换指令切换至所述第二基站；
    其中，所述第一信息包括所述UE感兴趣的MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述业务的类型；每个邻区基站上报的所述第二信息包括所述邻区基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
  12. 根据权利要求11所述的方法，其特征在于，所述第二基站广播第一数量的所述UE感兴趣的MBMS，所述第一数量不少于所述多个邻区基站中除所述第二基站外的其他任一邻区基站广播所述UE感兴趣的MBMS的数量。
  13. 根据权利要求11或12所述的方法，其特征在于，所述，用户设备UE向第一基站上报第一信息，包括：
    所述UE向所述第一基站发送MBMS兴趣指示消息，所述MBMS兴趣指示消息携带所述第一信息。
  14. 根据权利要求11至13任一所述的方法，其特征在于，所述业务信息包括临时移动群组标识TMGI。
  15. 一种多媒体广播/多播业务MBMS的通信方法，其特征在于，包括：
    第二基站向服务用户设备UE的第一基站发送携带第二信息的请求消息，以使所述第一基站根据所述UE上报的第一信息和所述第二信息为UE选择切换的目标服务基站；及
    所述第二基站接收所述第一基站根据所述请求消息发送的响应消息；
    其中，所述第一信息包括所述UE感兴趣的MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述业务的类型；所述第二信息包括所述第二基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
  16. 根据权利要求15所述的方法，其特征在于，所述业务信息包括临时移动群组标识TMGI。
  17. 根据权利要求15或16所述的方法，其特征在于，所述请求消息包括基站配置更新请求消息。
  18. 根据权利要求15或16所述的方法，其特征在于，所述请求消息包括X2接口修改请求消息。
  19. 根据权利要求15或16所述的方法，其特征在于，所述，第二基站向服务用户设备UE的第一基站发送携带第二信息的请求消 息，包括：
    所述第二基站向多小区/多播协同节点MCE发送携带所述第二信息的M2建立请求消息，以使所述MCE根据所述M2建立请求消息向所述第一基站发送MBMS调度信息消息，所述MBMS调度信息消息携带所述第二信息。
  20. 一种多媒体广播/多播业务MBMS的通信方法，其特征在于，包括：
    第二基站接收服务用户设备UE的第一基站发送的X2接口切换请求消息，所述切换请求消息中包括用于指示所述第二基站上报第二信息至所述第一基站的指示信息；及
    所述第二基站根据所述指示信息向所述第一基站发送携带所述第二信息的切换响应消息，以使所述第一基站根据所述UE上报的第一信息和所述第二信息为UE选择切换的目标服务基站；
    其中，所述第一信息包括所述UE感兴趣的MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述业务的类型；所述第二信息包括所述第二基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
  21. 一种基站，其特征在于，包括：
    接收器，用于获取用户设备UE上报的第一信息，所述第一信息包括所述UE感兴趣的多媒体广播/多播业务MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述业务的类型；
    所述接收器还用于获取所述基站的多个邻区基站上报的第二信息，每个邻区基站上报的所述第二信息包括所述邻区基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系；及
    处理器，用于根据所述第一信息和所述第二信息从所述多个邻区基站中选出第二基站，将所述UE切换至所述第二基站。
  22. 根据权利要求21所述的基站，其特征在于，所述第二基站广播第一数量的所述UE感兴趣的MBMS，所述第一数量不少于所述多个邻区基站中除所述第二基站外的其他任一邻区基站广播所述UE 感兴趣的MBMS的数量。
  23. 根据权利要求21或22所述的基站，其特征在于，所述接收器用于接收所述UE发送的MBMS兴趣指示消息，所述MBMS兴趣指示消息携带所述第一信息。
  24. 根据权利要求21至23任一所述的基站，其特征在于，所述业务信息包括临时移动群组标识TMGI。
  25. 根据权利要求21至24任一所述的基站，其特征在于，所述接收器用于接收每个邻区基站发送的基站配置更新请求消息，所述基站配置更新请求消息携带所述第二信息。
  26. 根据权利要求21至24任一所述的基站，其特征在于，所述接收器用于接收每个邻区基站发送的X2接口修改请求消息，所述X2接口修改请求消息携带所述第二信息。
  27. 根据权利要求21至24任一所述的基站，其特征在于，所述接收器用于接收多小区/多播协同节点MCE发送的MBMS调度信息消息，所述MBMS调度信息消息携带所述第二信息。
  28. 根据权利要求27所述的基站，其特征在于，所述MBMS调度信息消息是所述MCE根据从邻区基站接收到的M2接口建立请求消息向所述基站发送的，所述M2接口建立请求消息携带所述第二信息。
  29. 根据权利要求27所述的基站，其特征在于，所述MBMS调度信息消息是所述MCE根据从MME接收到的M3接口重置消息向所述基站发送的，所述M3接口重置消息携带所述第二信息。
  30. 根据权利要求21至24任一所述的基站，其特征在于，所述基站还包括发送器，所述发送器用于向每个邻区基站发送X2接口切换请求消息，所述切换请求消息中包括用于指示邻区基站上报所述第二信息至所述基站的指示信息；
    所述接收器用于接收每个邻区基站根据所述指示信息发送的切换响应消息，所述切换响应消息携带所述第二信息。
  31. 一种用户设备UE，其特征在于，包括：
    发送器，用于向第一基站上报第一信息，以使所述第一基站根据所述第一信息和多个邻区基站上报的第二信息从所述多个邻区基站中选出第二基站；及
    接收器，用于接收所述第一基站发送的切换指令，以根据所述切换指令切换至所述第二基站；
    其中，所述第一信息包括所述UE感兴趣的多媒体广播/多播业务MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述业务的类型；每个邻区基站上报的所述第二信息包括所述邻区基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
  32. 根据权利要求31所述的UE，其特征在于，所述第二基站广播第一数量的所述UE感兴趣的MBMS，所述第一数量不少于所述多个邻区基站中除所述第二基站外的其他任一邻区基站广播所述UE感兴趣的MBMS的数量。
  33. 根据权利要求31或32所述的UE，其特征在于，所述发送器用于向所述第一基站发送MBMS兴趣指示消息，所述MBMS兴趣指示消息携带所述第一信息。
  34. 根据权利要求31至33任一所述的UE，其特征在于，所述业务信息包括临时移动群组标识TMGI。
  35. 一种基站，其特征在于，包括：
    发送器，用于向服务用户设备UE的第一基站发送携带第二信息的请求消息，以使所述第一基站根据所述UE上报的第一信息和所述第二信息为UE选择切换的目标服务基站；及
    接收器，用于接收所述第一基站根据所述请求消息发送的响应消息；
    其中，所述第一信息包括所述UE感兴趣的多媒体广播/多播业务MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述业务的类型；所述第二信息包括所述基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
  36. 根据权利要求35所述的基站，其特征在于，所述业务信息 包括临时移动群组标识TMGI。
  37. 根据权利要求35或36所述的基站，其特征在于，所述请求消息包括基站配置更新请求消息。
  38. 根据权利要求35或36所述的基站，其特征在于，所述请求消息包括X2接口修改请求消息。
  39. 根据权利要求35或36所述的基站，其特征在于，所述发送器用于向多小区/多播协同节点MCE发送携带所述第二信息的M2建立请求消息，以使所述MCE根据所述M2建立请求消息向所述第一基站发送MBMS调度信息消息，所述MBMS调度信息消息携带所述第二信息。
  40. 一种基站，其特征在于，包括：
    接收器，用于接收服务用户设备UE的第一基站发送的X2接口切换请求消息，所述切换请求消息中包括用于指示所述基站上报第二信息至所述第一基站的指示信息；及
    发送器，用于根据所述指示信息向所述第一基站发送携带所述第二信息的切换响应消息，以使所述第一基站根据所述UE上报的第一信息和所述第二信息为UE选择切换的目标服务基站；
    其中，所述第一信息包括所述UE感兴趣的多媒体广播/多播业务MBMS的业务信息与广播所述业务的频点之间的对应关系，所述业务信息用于表示所述业务的类型；所述第二信息包括所述基站广播的MBMS业务信息与广播所述业务的频点之间的对应关系。
  41. 一种通信系统，其特征在于，包括如权利要求21至30任一所述的第一基站、如权利要求31至34任一所述的用户设备UE以及如权利要求35至39任一所述的第二基站。
  42. 一种通信系统，其特征在于，包括如权利要求21至30任一所述的第一基站、如权利要求31至34任一所述的用户设备UE以及如权利要求40所述的第二基站。
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