WO2016086359A1

WO2016086359A1 - Method for keeping service continuity, base station and system

Info

Publication number: WO2016086359A1
Application number: PCT/CN2014/092812
Authority: WO
Inventors: 曹龙雨; 戴明增; 张艳平
Original assignee: 华为技术有限公司
Priority date: 2014-12-02
Filing date: 2014-12-02
Publication date: 2016-06-09
Also published as: CN105850160A

Abstract

The present invention provides a method for keeping service continuity, a base station and a system. The method comprises: a first base station serving a first multicast-broadcast single-frequency network (MBSFN) area broadcasts a first multimedia broadcast/multicast service (MBMS) to a user equipment; the first base station receives indication information sent by a second base station serving a second MBSFN area, the indication information being used for indicating that a service currently broadcast in the second MBSFN area is the first MBMS; and when the user equipment leaves the first MBSFN area, the first base station hands over the user equipment from the base station in the current MBSFN area to the second MBSFN area according to the indication information, so that the user equipment receives the first MBMS in the second MBSFN area. By means of the method provided in embodiments of the present invention, a UE can continuously receive an MBMS when the UE moves, thereby ensuring service continuity.

Description

Method, base station and system for maintaining business continuity

Technical field

The present invention relates to communication technologies, and in particular, to a method, a base station, and a system for maintaining service continuity.

Background technique

With the continuous development of communication technologies, users are increasingly demanding continuity of communication services. In the scenario of the Multimedia Broadcast/Multicast Service (MBMS) service broadcast, in order to ensure that the UE can still receive the MBMS service during the mobile process and maintain the continuity of the MBMS service, the prior art adopts the following scheme. :

Referring to FIG. 1, it is assumed that the base station 1 serves the MBSFN area 1, the system frequency of the MBSFN area 1 is f1, and the corresponding MBMS service area identifier (SAI) is SAI1, and both the base station 2 and the base station 3 are The neighboring base stations of the base station 1 serve the MBSFN area 2 and the MBSFN area 3, respectively, and the system frequencies of the MBSFN area 2 and the MBSFN area 3 are f2 and f3, respectively, and the UE is currently located in the MBSFN area 1 and is served by the base station 1. The base station 1 not only broadcasts the SAI1 and the system frequency f1 corresponding to the MBSFN area 1 but also the SAI corresponding to the MBSFN area 2 and the MBSFN area 3 and its system frequency, that is, the SIB15, in the System Information Block (SIB) 15. It may include: SAI list = {SAI1, SAI2, SAI3}, frequency list = {f1, f2, f3}, and the correspondence between SAI and frequency = {SAI1--f1; SAI2--f2; SAI3--f3} .

When the UE is not moving, the UE receives the SIB15 message broadcasted by the base station 1 and determines the SAI corresponding to the MBMS service that the UE is interested in in the User Service Description (hereinafter referred to as USD) saved by itself (assuming that the service of the UE is interested in the service) The SAI is SAI1 and SAI2, but the optional UE will preferentially select the SAI corresponding to the current cell, that is, SAI1, how the UE is selected depends on the internal implementation of the UE, and whether it matches the SAI in the SAI list of the SIB15 broadcast (in USD) Includes multiple SAIs). If the match is made, the UE determines that the system frequency corresponding to the SAI1 is f1 according to the correspondence between the SAI and the system frequency in the SIB15, and carries the f1 in the MBMS interest indication message and sends the signal to the base station 1. After receiving the f1 reported by the UE, the base station 1 determines the SAI1 corresponding to the f1, that is, determines that the base station of the MBMS service that the broadcast UE is interested in is the base station 1 of the MBSFN area, and the base station 1 Broadcasting the MBMS service on the f1; if the UE determines that the SAI corresponding to the service of interest in the saved USD is SAI3 (ie, the base station 1 currently serving the UE does not broadcast the MBMS service that the UE is interested in, but broadcasts in other base stations) The UE is currently interested in the MBMS service. The UE transmits the system frequency f3 corresponding to the SAI3 in the MBMS interest indication message to the base station 1 according to the above determining process. The base station 1 determines that the f3 corresponds to the SAI3, and the base station 3 corresponding to the SAI3. Then, the UE is handed over from the base station 1 to the base station 3, so that the UE receives the MBMS service delivered by the base station 3 on the f3. The method enables the UE to select which frequency to receive before the start of the MBMS service, because the MBMS service interruption of the UE is not caused.

Figure 1 is directed to scenarios in which different MBSFN areas broadcast different MBMS services, and the SAIs corresponding to these MBSFNs are also different, but in actual scenarios, different MBSFN areas can also broadcast the same MBMS service, and different MBSFN areas. The same SAI may be corresponding. For example, the SAI corresponding to the MBSFN area 1 and the MBSFN area 2 in FIG. 1 is SAI1, and the MBSFN area 1 and the MBSFN area 2 are broadcasting the first MBMS service on f1 and f2, respectively; The first MBMS service delivered by the base station 1 is received. When the UE moves to a certain location (assuming that the location is a location jointly covered by the base station 2 and the base station 3), the UE does not receive the information at f1 due to signal attenuation or other reasons. The signal strength of the first MBMS service broadcasted by the base station 1 or the base station 1 receiving the first MBMS service is weak (while the first MBMS service is still the service required by the UE), the base station 1 cannot know its neighbor. Which base station is broadcasting the first MBMS service, and therefore cannot switch the UE to the correct target cell, thereby causing the first MBMS service interruption of the UE, that is, the same MBMS service is being performed on a different base station. When sowing, due to broadcast the MBMS service in the MBSFN area changes, resulting in UE can not switch to the correct target cell, resulting in an MBMS suspension.

Summary of the invention

The embodiments of the present invention provide a method, a base station, and a system for maintaining service continuity, which are used to solve the problem that when the MBSFN area of the MBMS service is changed, the UE is broadcasted when the same MBMS service is being broadcasted on a different base station. Unable to switch to the correct target cell, causing technical problems with MBMS service interruption.

In a first aspect, an embodiment of the present invention provides a base station, including:

a sending module, configured to broadcast, to the user equipment, the first multimedia broadcast multicast MBMS service;

a receiving module, configured to receive the indication information that is sent by the second base station that serves the second MBSFN area, where the indication information is used to indicate that the service currently broadcasted by the second MBSFN area is the first MBMS service;

a processing module, configured to: when the user equipment leaves the first MBSFN area, switch the user equipment from a base station of a current MBSFN area to the second MBSFN area according to the indication information, so that the user equipment Receiving the first MBMS service on the second MBSFN area.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the processing module is further configured to: before switching the user equipment from a current MBSFN area to the second MBSFN area, according to the Instructing information selection to switch the user equipment to the second MBSFN area.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the receiving module is configured to receive a base station configuration update sent by the second base station The request message, the base station configuration update request message carries the indication information, or is specifically configured to receive an X2 interface modification request message sent by the second base station, where the X2 interface modification request message carries the indication information, Or specifically, it is used to receive indication information that is sent by the second base station by using the network element device.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, if the network element device is a multi-cell multicast coordination entity (MCE), the receiving module is specifically used. Receiving the MBMS scheduling information that is sent by the second base station by using the MCE, where the MBMS scheduling information is sent by the MCE to the base station according to the received M2 interface setup request message sent by the second base station. The indication information is carried in both the M2 interface setup request message and the MBMS scheduling information.

With reference to the second possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, if the network element device includes the first multi-cell multicast coordination entity MCE, the second MCE, and the first mobility And the receiving module is configured to receive the MBMS scheduling information that is sent by the second base station by using the first MCE, where the MBMS scheduling information is the first MCE according to the first MCE. The received M3 interface reset message sent by the first MME is sent to the base station, and the M3 interface reset message is sent by the first MME according to the received information sent by the second MME. The indication information that is sent to the first MCE is an M3 interface setup request sent by the second MME according to the received second MCE. Sending the message to the first MME, the M3 interface setup request message is sent by the second MCE to the second MME according to the received M2 interface setup request message sent by the second base station; The indication information is carried in the M2 interface setup request message, the M3 interface setup request message, the M3 interface reset message, and the MBMS scheduling information.

In conjunction with the first aspect, the fourth possible implementation manner of the first aspect, in the fifth possible implementation manner of the first aspect, the indication information includes that the second MBSFN area is currently broadcast The service information of the service, and the identity of the second base station or the second system frequency of the second base station.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the indication information is service information of the service currently broadcasted by the second MBSFN area, and the second The processing module is configured to: when the user equipment leaves the first MBSFN area, switch the user equipment to the second base station according to the indication information; or

When the indication information is the service information of the service currently broadcasted by the second MBSFN area and the second system frequency of the second base station, the processing module is specifically configured to leave the first MBSFN at the user equipment. In the case of the area, the user equipment is switched to the target base station in the second MBSFN area according to the indication information and the configuration information of the first base station.

In a second aspect, an embodiment of the present invention provides a base station, where the base station serves an MBSFN area of a second multicast broadcast single frequency network, where the base station includes:

a sending module, configured to send indication information to a first base station serving the first MBSFN area, where the first base station currently broadcasts the first multimedia broadcast multicast MBMS service to the user equipment, where the indication information is used And indicating that the service currently broadcasted by the second MBSFN area is the first MBMS service.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the sending module is configured to send a base station configuration update request message to the first base station, where the base station configuration update request message carries The indication information is used to send an X2 interface request message to the first base station, where the X2 interface request message carries the indication information, or is specifically used to send to the first base station by using a network element device. Instructions.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, if the network element device is a multi-cell multicast coordination entity MCE, the sending module is specific The MBMS scheduling information is sent to the first base station by using the MCE, where the MBMS scheduling information is sent by the MCE to the first base station according to the received M2 interface setup request message sent by the base station. The indication information is carried in both the M2 interface setup request message and the MBMS scheduling information.

With reference to the first possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, if the network element device includes the first multi-cell multicast coordination entity MCE, the second MCE, and the first mobility And the sending module is configured to send the MBMS scheduling information to the first base station by using the first MCE, where the MBMS scheduling information is the first MCE according to the receiving The M3 interface reset message sent by the first MME is sent to the first base station, and the M3 interface reset message is the indication sent by the first MME according to the received second MME. The information is sent to the first MCE, and the indication information is sent by the second MME to the first MME according to the received M3 interface setup request message sent by the second MCE, and the M3 interface is established. The request message is sent by the second MCE to the second MME according to the received M2 interface setup request message sent by the base station; the M2 interface setup request message, the M3 interface setup request message, and the M3 Interface reset message and the MBMS schedule The indication information is carried in the information.

With reference to any one of the second aspect to the third possible implementation manner of the second aspect, in the fourth possible implementation manner of the second aspect, the indication information includes that the second MBSFN area is currently broadcast The service information of the service, and the identity of the base station or the second system frequency of the base station.

With reference to the fourth possible implementation of the second aspect, in a fifth possible implementation of the second aspect, the identifier of the base station is used to enable the first base station to determine that the user equipment leaves the Switching the user equipment to the base station when the first MBSFN area is used;

The second system frequency of the base station is configured to enable the first base station to switch the user equipment to a target base station in the second MBSFN area when determining that the user equipment leaves the first MBSFN area.

In a third aspect, an embodiment of the present invention provides a method for maintaining service continuity, including:

Serving the first multimedia broadcast multicast MBMS service to the user equipment by the first base station serving the first multicast broadcast single frequency network MBSFN area;

The first base station receives the indication information sent by the second base station serving the second MBSFN area, where The indication information is used to indicate that the service currently broadcast by the second MBSFN area is the first MBMS service;

When the user equipment leaves the first MBSFN area, the first base station switches the user equipment from a base station of a current MBSFN area to the second MBSFN area according to the indication information, so that the user equipment Receiving the first MBMS service on the second MBSFN area.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the first base station, before the user equipment is switched from the base station of the current MBSFN area to the second MBSFN area, according to the indication information Including, including:

The first base station selects to switch the user equipment to the second MBSFN area according to the indication information.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the first base station receives the indication information sent by the second base station serving the second MBSFN area ,include:

Receiving, by the first base station, a base station configuration update request message sent by the second base station, where the base station configuration update request message carries the indication information, or

The first base station receives the X2 interface modification request message sent by the second base station, where the X2 interface modification request message carries the indication information, or

The first base station receives indication information that is sent by the second base station by using the network element device.

With reference to the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, if the network element device is a multi-cell multicast coordination entity (MCE), the first base station receives the service The indication information sent by the second base station of the second MBSFN area by the network element device includes:

The first base station receives the MBMS scheduling information that is sent by the second base station by using the MCE, where the MBMS scheduling information is sent by the MCE according to the received M2 interface setup request message sent by the second base station to The indication information is carried in both the M2 interface setup request message and the MBMS scheduling information of the first base station.

With reference to the second possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, if the network element device includes the first multi-cell multicast coordination entity MCE, the second MCE, and the first mobility And the first base station receives the indication information that is sent by the second base station that serves the second MBSFN area by using the network element device, and includes:

The first base station receives the MBMS scheduling information that is sent by the second base station by using the first MCE, where the MBMS scheduling information is that the first MCE is based on the received M3 interface sent by the first MME. Sending the message to the first base station, the M3 interface reset message is sent by the first MME to the first MCE according to the received indication information sent by the second MME, The indication information is sent by the second MME to the first MME according to the received M3 interface setup request message sent by the second MCE, where the M3 interface setup request message is received by the second MCE according to the received The M2 interface setup request message sent by the second base station is sent to the second MME; the M2 interface setup request message, the M3 interface setup request message, the M3 interface reset message, and the MBMS scheduling information The indication information is carried in both.

With reference to any one of the third aspect to the fourth possible implementation manner of the third aspect, in the fifth possible implementation manner of the third aspect, the indication information includes that the second MBSFN area is currently broadcast The service information of the service, and the identity of the second base station or the second system frequency of the second base station.

With reference to the fifth possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the indication information is service information of the service currently broadcasted by the second MBSFN area, and the second When the user equipment leaves the first MBSFN area, the first base station switches the user equipment to the second base station according to the indication information; or

When the indication information is the service information of the service currently broadcasted by the second MBSFN area and the second system frequency of the second MBSFN area, the first base station leaves the first MBSFN area at the user equipment And the user equipment is switched to the target base station in the second MBSFN area according to the indication information and the configuration information of the first base station.

In a fourth aspect, an embodiment of the present invention provides a method for maintaining service continuity, including:

The second base station serving the second multicast broadcast single frequency network MBSFN area sends the indication information to the first base station serving the first MBSFN area; wherein the first base station currently broadcasts the first multimedia broadcast to the user equipment. The MBMS service is broadcasted, and the indication information is used to indicate that the service currently broadcasted by the second MBSFN area is the first MBMS service.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the second base station serving the MBSFN area of the second multicast broadcast single frequency network to the first base serving the first MBSFN area The station sends instructions, including:

The second base station sends a base station configuration update request message to the first base station, where the base station configuration update request message carries the indication information, or

The second base station sends an X2 interface request message to the first base station, where the X2 interface request message carries the indication information, or

The second base station sends the indication information to the first base station by using the network element device.

With reference to the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, if the network element device is a multi-cell multicast coordination entity MCE, the second base station passes the network element device Sending the indication information to the first base station, including:

The second base station sends the MBMS scheduling information to the first base station by using the MCE, where the MBMS scheduling information is sent by the MCE according to the received M2 interface setup request message sent by the second base station. The first base station is configured to be included in the M2 interface setup request message and the MBMS scheduling information.

With reference to the first possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, if the network element device includes the first multi-cell multicast coordination entity MCE, the second MCE, and the first mobility And the second base station sends the indication information to the first base station by using the network element device, where

The second base station sends the MBMS scheduling information to the first base station by using the first MCE, where the MBMS scheduling information is that the first MCE resets according to the received M3 interface sent by the first MME. Sending the message to the first base station, the M3 interface reset message is sent by the first MME to the first MCE according to the received indication information sent by the second MME, The information is sent by the second MME to the first MME according to the received M3 interface setup request message sent by the second MCE, where the M3 interface setup request message is the second MCE according to the received The M2 interface setup request message sent by the second base station is sent to the second MME; the M2 interface setup request message, the M3 interface setup request message, the M3 interface reset message, and the MBMS scheduling information. Both carry the indication information.

With reference to any one of the fourth aspect to the third possible implementation manner of the fourth aspect, in the fourth possible implementation manner of the fourth aspect, the indication information includes that the second MBSFN area is currently broadcast Service information of the service, and the identifier of the second base station or the second base station Two system frequencies.

With reference to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the identifier of the second base station is configured to enable the first base station to determine that the user equipment is leaving Switching the user equipment to the second base station when the first MBSFN area is used;

The second system frequency of the second base station is configured to enable the first base station to switch the user equipment to a target in the second MBSFN area when determining that the user equipment leaves the first MBSFN area Base station.

The fifth aspect, the embodiment of the present invention provides a system for maintaining service continuity, including a user equipment, and the base station according to any one of the first aspect to the sixth aspect of the first aspect, and The base station according to any one of the second possible aspect of the second aspect.

The method, the base station, and the system for maintaining service continuity according to the embodiment of the present invention receive, by the first base station, indication information that is sent by the second base station to indicate that the service currently broadcast by the second base station is the first MBMS service, if the first base station determines When the UE leaves the first MBSFN area served by the first base station, the first base station switches the user equipment from the base station of the current MBSFN area to the second base station according to the indication information, so that the UE continues to receive the first MBMS service on the second base station. Therefore, the UE can continuously receive the MBMS service during the mobile process, thereby ensuring the continuity of the service.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

FIG. 1 is a schematic diagram of a scenario in which different MBSFN areas broadcast different MBMS services according to the prior art provided by the present invention;

2 is a schematic diagram of a scenario in which different MBSFN areas broadcast the same MBMS service according to the present invention;

3 is a schematic structural diagram of Embodiment 1 of a base station according to the present invention;

4 is a schematic diagram 1 of a network topology provided by the present invention;

FIG. 5 is a schematic diagram 2 of a network topology provided by the present invention; FIG.

FIG. 6 is a schematic flowchart diagram of Embodiment 1 of a method for maintaining service continuity according to the present invention;

FIG. 7 is a signaling flowchart of Embodiment 3 of a method for maintaining service continuity according to the present invention;

FIG. 8 is a signaling flowchart of Embodiment 4 of a method for maintaining service continuity according to the present invention;

FIG. 9 is a signaling flowchart of Embodiment 5 of a method for maintaining service continuity according to the present invention;

10 is a signaling flowchart of Embodiment 6 of a method for maintaining service continuity according to the present invention;

11 is a schematic structural diagram of Embodiment 3 of a base station according to the present invention;

FIG. 12 is a schematic structural diagram of a system embodiment for maintaining service continuity according to the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The user equipment, that is, the terminal involved in the present application, may be a wireless terminal or a wired terminal, and the wireless terminal may be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connection function, or is connected to Other processing devices for wireless modems. The wireless terminal can communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and with a mobile terminal The computers, for example, can be portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile devices that exchange language and/or data with the wireless access network. For example, personal communication service (PCS, Personal Communication Service) telephone, cordless telephone, Session Initiation Protocol (SIP) telephone, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA, Personal Digital Assistant), etc. . A wireless terminal may also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, or an access point. Remote Terminal, Access Terminal, User Terminal, User Agent, User Device, or User Equipment.

A base station (e.g., an access point) referred to in this application may refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface. The base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network. The base station can also coordinate attribute management of the air interface. For example, the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), this application is not limited.

The embodiment of the present invention can be applied to a scenario in which a user equipment receives a service broadcast by a base station in an MBSFN area in a process of moving between multicast broadcast single frequency networks (MBSFN). Optionally, the service here may be an MBMS service, where the MBMS service may be a data service, or may be a voice service, or may be another multimedia service. It should be noted that one MBSFN area may include multiple cells, and one MBSFN area may be served by multiple base stations, but the system frequencies used by all base stations in one MBSFN area to broadcast MBMS services are the same, different. The frequencies used by the base stations in the MBSFN area to broadcast MBMS services are different; and different MBSFN areas can broadcast the same MBMS service, and these different MBSFN areas can correspond to the same SAI. The scenario involved in the embodiment of the present invention may be that the different MBSFN areas broadcast the same MBMS service, and the different MBSFN areas correspond to the same SAI scenario, as shown in FIG. 2 .

FIG. 3 is a schematic structural diagram of Embodiment 1 of a base station according to the present invention. As shown in FIG. 3, the base station serves the first MBSNN area, and the base station may be the first base station in the following method embodiments, where the base station includes: a sending module 10, a receiving module 11, and a processing module 12.

The sending module 10 is configured to broadcast the first MBMS service to the user equipment, and the receiving module 11 is configured to receive the indication information sent by the second base station serving the second MBSFN area, where the indication information is used to indicate the The service currently broadcasted by the two MBSFN areas is the first MBMS service, and the processing module 12 is configured to, when the user equipment leaves the first MBSFN area, use the user equipment from the current MBSFN area according to the indication information. The base station switches to the second MBSFN area, so that the user equipment receives the first MBMS service on the second MBSFN area.

Specifically, the sending module 10 is currently broadcasting the first MBMS service to the user equipment. When the second MBSFN area starts to broadcast the first MBMS service, the second MBSFN area sends the indication information to the first base station by using the second base station, that is, the indication is passed. The information indicates to the first base station that the service currently broadcast by the second MBSFN area is the first MBMS service. It should be noted that the base station in the second MBSFN area broadcasts the first MBMS service, and the second base station in the second MBSFN area may broadcast the first MBMS service, or may be other than the second base station in the second MBSFN area. The base station broadcasts the first MBMS service; that is, as long as the MBMS service starts broadcasting in the second MBSFN area, the second MBSFN area sends the indication information to the first base station by using the second base station to indicate to the first base station that the second MBSFN area is currently The type of MBMS service broadcast. In addition, the second base station is a neighboring base station of the first base station, and the second base station may be one or more. Therefore, the indication information may be one or multiple, that is, the first base station. There may be multiple different neighbor base stations.

After the receiving module 11 of the first base station receives the indication information sent by the second base station, the processing module 12 determines, according to the indication information, that the second MBSFN area is currently broadcasting the first MBMS service, and the processing module 12 performs the indication information. Record or stage. When the UE in the first MBSFN area leaves the first MBSFN area (where the leaving the first MBSFN area may move the UE to any MBSFN area except the first MBSFN area, the UE may also move to the first MBSFN area. In the edge area, the UE is unable to receive the first MBMS service broadcasted by the sending module 10 or the signal strength of the first MBMS service is very weak, and the processing module 12 switches the UE to the first broadcast according to the indication information. The second MBSFN area of the MBMS service is used to ensure that the UE receives the first MBMS service continuously. It should be noted that, here, the UE is switched to the second MBSFN area, and actually the user equipment is switched to the base station in the second MBSFN area. Optionally, when the second base station is currently broadcasting the first MBMS service, the processing module 12 may switch the UE to the second base station according to the indication information. Optionally, when other base stations in the second MBSFN area are currently broadcasting, For the first MBMS service, the processing module 12 may switch the UE to other base stations in the second MBSFN area that are broadcasting the first MBMS service according to the indication information sent by the second base station.

Referring to FIG. 2, the UE is currently in the first MBSFN area, and the UE is receiving the first MBMS service broadcasted by the sending module 10 on the first system frequency. When the UE moves from the first MBSFN area to other MBSFN areas, it is assumed that the UE moves to the edge of the first MBSFN area shown in FIG. 2, The third MBSFN area is about to enter. At this time, the UE does not receive the first MBMS service broadcast by the sending module 10 on the first system frequency or the signal strength of receiving the first MBMS service is weak (while the first MBMS service remains at this time). If the UE is interested in the service, the UE reports the current communication quality to the first base station, for example, by reporting the report feedback, or by reporting the information to the first base station by using other information. After the processing module 12 of the first base station learns that the current communication quality of the UE is poor, the service that is currently being broadcast in the second MBSFN area is the first MBMS service according to the indication information sent by the second base station. Therefore, in order to ensure that the UE receives the continuity of the first MBMS service, the processing module 12 switches the UE from the base station of the current third MBSFN area to the second MBSFN area. Optionally, the processing module 12 may notify, by using a corresponding handshake protocol or signaling, that the UE should currently establish communication with the base station that broadcasts the first MBMS service in the second MBSFN area, thereby switching the UE to the second MBSFN area, thereby enabling The UE may continue to receive the first MBMS service on the second MBSFN area, ensuring that the UE receives the continuity of the first MBMS service. It should be noted that, if the processing module 12 finally determines that the UE can be handed over to multiple base stations in the second MBSFN area, the processing module 12 may select one base station to switch the UE from the current base station of the third MBSFN area to the base station. Base station.

In the prior art, when the UE moves from the first MBSFN area to another MBSFN area, and the UE is still interested in the first MBMS service broadcast by the first base station, but the UE cannot be in the first place due to the movement of the UE. The signal strength of the first base station that receives the first MBMS service or receives the first MBMS service broadcast is weak on the broadcast frequency of the MBSFN area, but the first base station in the prior art cannot know other base stations except itself. Which of the current base stations is currently broadcasting the first MBMS service, and therefore cannot handover the UE to the correct target base station, thereby causing the UE to receive the first MBMS service interruption; however, in the present invention, since the second base station will be the second MBSFN The service currently broadcasted by the area is notified to the first base station by the indication information. Therefore, when the UE cannot receive the first MBMS service during the mobile process or the signal strength of the first base station that receives the first MBMS service is weak, the processing module 12 The UE may be switched from the base station of the currently located MBSFN area to the second MBSFN area according to the indication information, and continue to receive the first MBMS service on the second MBSFN area. So that the UE can receive the first MBMS service without interruption, ensuring that the UE receives the continuity of the first MBMS service.

The base station provided by the embodiment of the present invention broadcasts the first MBMS service to the user equipment by using the sending module, and receives the indication information sent by the second base station serving the second MBSFN area by the receiving module, When the processing module determines that the user equipment leaves the first MBSFN area, the user equipment may be switched from the base station of the current MBSFN area to the second MBSFN area according to the indication information, so that the user equipment receives the first MBMS on the second MBSFN area. The service enables the UE to continuously receive the MBMS service during the mobile process, thereby ensuring the continuity of the service.

On the basis of the foregoing embodiment, the processing module 12 is further configured to: before the user equipment is switched from the current MBSFN area to the second MBSFN area, select to switch the UE to the second MBSFN area according to the indication information. That is, when the UE leaves the first MBSFN area, the processing module 12 informs the UE that the second MBSFN area should be selected according to the indication information, and establishes communication with the base station in the second MBSFN area, thereby continuing to receive the second MBSFN area. An MBMS service.

Further, the indication information may include service information of a service currently broadcast by the second MBSFN area, and an identifier of the second base station or a second system frequency of the second base station.

Optionally, when the foregoing indication information is the service information of the service currently broadcasted by the second MBSFN area and the identifier of the second base station, the processing module 12, when determining that the UE leaves the first MBSFN area, switches the UE according to the indication information. To the second base station, that is to say the second base station in the second MBSFN area is currently broadcasting the first MBMS service. It should be noted that, even if other base stations in the second MBSFN area are currently broadcasting the first MBMS service, the processing module 12 still switches the UE to the second base station according to the identifier of the second base station. The identifier of the second base station may be the SAI corresponding to the second base station, and may be other identifiers of the second base station, as long as the first base station can identify the second base station according to the identifier.

Optionally, when the foregoing indication information is the service information of the service currently broadcasted by the second MBSFN area and the second system frequency of the second base station, the processing module 12 determines, according to the indication information, that the UE leaves the first MBSFN area. The configuration information of a base station (for example, the first system frequency of the first base station) selects a suitable target base station in the second MBSFN area (the target base station is currently broadcasting the first MBMS service), and switches the UE to the target in the second MBSFN area. Base station. It should be noted that even if the first MBSFN service is being broadcasted on the current second base station, the processing module 12 still selects a suitable target base station to perform handover. Of course, if the target base station determined by the processing module 12 is the second base station, the processing module 12 switches the UE to the second base station.

It should be noted that the service information of the service currently broadcasted by the second MBSFN area included in the foregoing indication information may be a temporary mobile group identifier of the service (Temporary Mobile Group) Identity, hereinafter referred to as TMGI, may also be attribute information of the service, and may be other identifiers of the service, as long as the processing module 12 can identify the service type of the service according to the service information.

On the basis of the foregoing embodiment, as a possible implementation manner of the embodiment of the present invention, the embodiment relates to a process in which the processing module 12 obtains the indication information from a base station configuration update request message sent by the second base station. Further, the receiving module 11 is configured to receive a base station configuration update request message sent by the second base station, where the base station configuration update request message carries the indication information.

Specifically, the second base station communicates with the base station by using the X2 interface, that is, the second base station sends an eNB configuration update request message to the first base station by using the X2 interface, where the base station configuration update request message carries the indication information. .

After receiving the base station configuration update request message sent by the second base station, the receiving module 11 sends a base station configuration update response message (eNB configuration update) to the second base station by using the sending module 10. When the UE moves from the first MBSFN area to the other MBSFN area, the processing module 12 determines that the current UE cannot receive the first MBMS service on the broadcast frequency of the first MBSFN area or receives the broadcast first MBMS service. When the signal strength of the first base station is weak, the processing module 12 learns that the service currently broadcasted by the second MBSFN area is the first MBMS service according to the foregoing indication information, and the processing module 12 can locate the UE from the current location of the UE according to the indication information. The base station of the MBSFN area is handed over to the base station in the second MBSFN area, so that the UE continues to receive the first MBMS service on the second MBSFN area, so that the UE can continuously receive the first MBMS service during the mobile process.

On the basis of the foregoing embodiment, as another possible implementation manner of the embodiment of the present invention, the embodiment relates to a process in which the processing module 12 obtains the indication information from the X2 interface modification request message sent by the second base station. Further, the receiving module 11 is specifically configured to receive an X2 interface modification request message sent by the second base station.

Specifically, the second base station communicates with the first base station by using the X2 interface, that is, the second base station sends an X2 interface modification request message (X2modify request) to the first base station by using the X2 interface, where the X2 interface modification request message carries the indication information. .

After receiving the X2 interface modification request message sent by the second base station, the receiving module 11 sends an X2 modification response message (X2modify response) to the second base station by using the sending module 10. When the UE moves from the first MBSFN area to the other MBSFN area, the processing module 12 determines that the current UE cannot receive the first MBMS service on the broadcast frequency of the first MBSFN area or receives the broadcast first MBMS service. When the signal strength of the first base station is weak, the processing module 12 learns that the service currently broadcasted by the second MBSFN area is the first MBMS service according to the foregoing indication information, and the processing module 12 can locate the UE from the current location of the UE according to the indication information. The base station of the MBSFN area is handed over to the second MBSFN area, so that the UE continues to receive the first MBMS service on the second MBSFN area, so that the UE can continuously receive the first MBMS service during the mobile process.

On the basis of the foregoing embodiment, as a third possible implementation manner of the embodiment of the present invention, the embodiment relates to a specific process of the receiving module 11 receiving the indication information sent by the second base station by using the network element device, where the network element For the MCE, refer to the network topology diagram shown in Figure 4. In Figure 4, the first base station and the second base station are scheduled and managed by a common MCE. Further, the receiving module 11 is configured to receive MBMS scheduling information that is sent by the second base station by using the MCE, where the MBMS scheduling information is that the MCE sends the M2 according to the received second base station. The interface setup request message is sent to the base station, and the indication information is carried in both the M2 interface setup request message and the MBMS scheduling information.

Specifically, when the first base station and the second base station are scheduled and managed by the same MCE, the first base station and the second base station can communicate with each other through the MCE, that is, the M2 interface between the base station and the MCE can communicate with each other.

The second base station sends an M2 interface setup request message (M2setup request) to the MCE through the M2 interface, where the M2 interface setup request message carries the indication information. After receiving the M2 interface setup request message sent by the second base station, the MCE sends an M2 interface setup response message (M2setup response) to the second base station, and carries the indication information in the M2 interface setup request message in the MBMS scheduling information (MBMS scheduling). Information) is sent to the first base station. After receiving the MBMS scheduling information, the receiving module 11 reads the indication information in the MBMS scheduling information by the processing module 12 to learn the service type currently being broadcast in the second MBSFN area, and sends the MBMS scheduling to the MCE through the sending module 10. Information response (MBMS scheduling Information response).

When the UE moves from the first MBSFN area to the other MBSFN area, the processing module 12 determines that the current UE cannot receive the first MBMS service on the broadcast frequency of the first MBSFN area or receives the broadcast first MBMS service. When the signal strength of the first base station is weak, the processing module 12 learns that the service currently broadcasted by the second MBSFN area is the first MBMS service according to the foregoing indication information, and the processing module 12 can locate the UE from the current location of the UE according to the indication information. The base station of the MBSFN area is handed over to the base station in the second MBSFN area, so that the UE continues to receive the first MBMS service on the second MBSFN area, so that the UE can continuously receive the first MBMS service during the mobile process.

On the basis of the foregoing embodiment, as a fourth possible implementation manner of the embodiment of the present invention, the embodiment relates to another specific process of the receiving module 11 receiving the indication information sent by the second base station by using the network element device, where The network element device includes a first MCE, a second MCE, a first MME, and a second MME. Referring to the network topology diagram shown in FIG. 5, in FIG. 5, the first MCE scheduling management first base station, and the second MCE scheduling management Two base stations, and the first MME manages the first MCE, and the second MME manages the second MCE. Optionally, the first MME and the second MME in FIG. 5 may also be the same MME, that is, the embodiment is also applicable to a scenario in which the first MCE and the second MCE are managed by the same MME. The following technical solution is described by taking a scenario in which the first MME manages the first MCE and the second MME manages the second MCE.

Further, the receiving module 11 is specifically configured to receive MBMS scheduling information that is sent by the second base station by using the first MCE, where the MBMS scheduling information is the first MCE according to the received first The M3 interface reset message sent by the MME is sent to the base station, and the M3 interface reset message is sent by the first MME to the first MCE according to the received indication information sent by the second MME. The indication information is sent by the second MME to the first MME according to the received M3 interface setup request message sent by the second MCE, where the M3 interface setup request message is the second MCE. And sending, by the received M2 interface setup request message, the M2 interface setup request message, the M3 interface setup request message, the M3 interface reset message, and the The indication information is carried in the MBMS scheduling information.

Specifically, when the first base station and the second base station are scheduled and managed by different MCEs, the first base The station and the second base station can communicate with each other through different MCEs. When two MCEs are managed by different MMEs, two different MCEs can communicate with each other through the MME. In this embodiment, the MeNB can interact with the MCE through the M2 interface, and the MCE and the MME can interact with each other through the M3 interface. The two different MMEs can interact with each other through the S10 interface.

The second base station sends the M2 interface setup request message (M2setup request) to the second MCE through the M2 interface, where the M2 interface setup request message carries the indication information. After receiving the M2 interface setup request message sent by the second base station, the second MCE sends an M2 interface setup response message (M2setup response) to the second base station, and carries the indication information in the M2 interface setup request message to the M3 interface setup request. The message is sent to the second MME in the message (M3setup request).

After receiving the M3 interface setup request message sent by the second MCE, the second MME reads the indication information therein, and sends an M3 interface setup response message (M3setup response) to the second MCE. The second MME sends the read indication information to the first MME through an S10 interface with the first MME.

The first MME sends the received indication information to the first MCE in the M3 interface reset message (M3RESET), and after receiving the M3 interface reset message, the first MCE sends an M3 interface reset confirmation message to the first MME. (M3RESET ACKNOWLEDGE). The first MCE reads the indication information in the M3 interface reset message, and carries the indication information in the MBMS scheduling information and sends the indication information to the first base station.

After receiving the MBMS scheduling information, the receiving module 11 reads the indication information in the MBMS scheduling information by the processing module 12 to learn the service type of the service currently being broadcast in the second MBSFN area, and the first The MCE sends an MBMS scheduling information response.

When the UE moves from the first MBSFN area to the other MBSFN area, the processing module 12 determines that the current UE cannot receive the first MBMS service on the broadcast frequency of the first MBSFN area or receives the broadcast first MBMS service. When the signal strength of the first base station is weak, the processing module 12 learns that the service currently broadcasted by the second MBSFN area is the first MBMS service according to the foregoing indication information, and the processing module 12 can locate the UE from the current location of the UE according to the indication information. The base station of the MBSFN area switches to the base station in the second MBSFN area, so that the UE continues to receive the first MBMS service on the second base station, so that the UE can continuously receive the first MBMS service during the mobile process.

The base station provided by the embodiment of the present invention broadcasts the first MBMS service to the user equipment by using the sending module, and receives the indication information sent by the second base station serving the second MBSFN area by the receiving module, so that the processing module determines that the user equipment leaves the first MBSFN. In the area, the user equipment is switched from the base station of the current MBSFN area to the second MBSFN area according to the indication information, so that the user equipment receives the first MBMS service on the second MBSFN area, so that the UE can continuously receive during the mobile process. The MBMS service guarantees the continuity of the business.

Embodiment 2 of the present invention provides a base station. The base station serves a second MBSFN area, which may be the second base station in the method embodiment. The base station includes: a sending module, configured to send the indication information to the first base station serving the first MBSFN area, where the first base station currently broadcasts the first MBMS service to the user equipment, where the indication information is used to indicate The service currently broadcast in the second MBSFN area is the first MBMS service.

Specifically, when the serving the second MBSFN area starts to broadcast the first MBMSN area, the second MBSFN area sends the indication information to the first base station by using the sending module of the second base station, that is, the second MBSFN area is indicated to the first base station by using the indication information. The current broadcast service is the first MBMS service. It should be noted that the base station in the second MBSFN area broadcasts the first MBMS service, and the second base station in the second MBSFN area may broadcast the first MBMS service, or may be other than the second base station in the second MBSFN area. The base station broadcasts the first MBMS service; that is, as long as the MBMS service starts broadcasting in the second MBSFN area, the second MBSFN area sends the indication information to the first base station through the sending module of the second base station to indicate the second to the first base station. The MBMS service type currently broadcast in the MBSFN area. In addition, the second base station where the sending module is located is a neighboring base station of the first base station, and the second base station may be one or more. Therefore, the indication information may be one or multiple. That is, the first base station may have multiple different neighbor base stations.

After receiving the indication information sent by the sending module, the first base station determines, according to the indication information, that the second MBSFN area is currently broadcasting the first MBMS service, and the first base station records or temporarily stores the indication information. When the UE in the first MBSFN area leaves the first MBSFN area (where the leaving the first MBSFN area may move the UE to any MBSFN area except the first MBSFN area, the UE may also move to the first MBSFN area. Edge area), at this time, the UE cannot receive the first MBMS service broadcasted by the first base station or the first broadcast received The signal strength of the first base station of the MBMS service is weak. The first base station switches the UE to the second MBSFN area that is currently broadcasting the first MBMS service according to the indication information, so as to ensure that the UE receives the first MBMS service continuously. Optionally, when the second base station is currently broadcasting the first MBMS service, the first base station may switch the UE to the second base station according to the indication information; optionally, when other base stations in the second MBSFN area are currently broadcasting, For the first MBMS service, the first base station may switch the UE to other base stations in the second MBSFN area that are broadcasting the first MBMS service according to the indication information sent by the second base station. For details, refer to the description of the embodiment shown in FIG. 3 above, and details are not described herein again.

The base station provided by the embodiment of the present invention sends, by the sending module, the indication information indicating that the service currently broadcasted in the second MBSFN area is the first MBMS service, and the first base station determines that the UE leaves the first base station service. In the MBSFN area, the first base station switches the user equipment from the base station of the current MBSFN area to the second MBSFN area according to the indication information, so that the UE continues to receive the first MBMS service on the second MBSFN area, thereby enabling the UE to The first MBMS service can be continuously received during the mobile process to ensure continuity of the service.

Further, the indication information may include service information of a service currently broadcast by the second MBSFN area, and an identifier of the base station (ie, the second base station) or a second system frequency of the second base station.

Optionally, when the indication information is the service information of the service currently broadcasted by the second MBSFN area and the identifier of the second base station, the first base station, when determining that the UE leaves the first MBSFN area, switches the UE according to the indication information. To the second base station, that is to say the transmitting module of the second base station in the second MBSFN area is currently broadcasting the first MBMS service. It should be noted that, even if other base stations in the second MBSFN area are currently broadcasting the first MBMS service, the first base station still switches the UE to the second base station according to the identifier of the second base station. The identifier of the second base station may be the SAI corresponding to the second base station, and may be other identifiers of the second base station, as long as the first base station can identify the second base station according to the identifier.

Optionally, when the indication information is the service information of the service currently broadcasted by the second MBSFN area and the second system frequency of the second base station, when the first base station determines that the UE leaves the first MBSFN area, according to the indication information and the The configuration information of a base station (for example, the first system frequency of the first base station) selects a suitable target base station in the second MBSFN area (the target base station is currently broadcasting the first MBMS service), and switches the UE to the target in the second MBSFN area. Base station. It should be noted that even if the first MBSFN service is being broadcasted on the current second base station, the first base station will still The appropriate target base station will be selected for handover. Of course, if the target base station determined by the first base station is the second base station, the first base station switches the UE to the second base station.

It should be noted that the service information of the service currently broadcasted by the second MBSFN area included in the foregoing indication information may be the TMGI of the service, the attribute information of the service, or other identifiers of the service, as long as the A base station can identify the service type of the service according to the service information.

On the basis of the foregoing embodiments, as a possible implementation manner of the embodiment of the present invention, the embodiment relates to a process in which the sending module carries the indication information in the base station configuration update request message and sends the information to the first base station. Further, the sending module is configured to send a base station configuration update request message to the first base station, where the base station configuration update request message carries the indication information.

Specifically, the second base station communicates with the first base station by using the X2 interface, that is, the sending module of the second base station sends a base station configuration update request message (eNB configuration update request) to the first base station by using the X2 interface, where the base station configures the update request message. Carry the above instructions.

After receiving the base station configuration update request message sent by the second base station, the first base station sends a base station configuration update response message (eNB configuration update) to the second base station. When the UE moves from the first MBSFN area to another MBSFN area, if the first base station determines that the current UE cannot receive the first MBMS service on the broadcast frequency of the first MBSFN area or receives the broadcast first MBMS service When the signal strength of the first base station is weak, and the first base station learns that the service currently broadcasted by the second MBSFN area is the first MBMS service, the first base station may present the UE from the UE according to the indication information. The base station of the MBSFN area is handed over to the base station in the second MBSFN area, so that the UE continues to receive the first MBMS service on the second MBSFN area, so that the UE can continuously receive the first MBMS service during the mobile process.

On the basis of the foregoing embodiments, as another possible implementation manner of the embodiment of the present invention, the embodiment relates to a process in which the sending module carries the indication information in the X2 interface modification request message and sends the information to the first base station. Further, the sending module is specifically configured to send an X2 interface request message to the first base station, where the X2 interface request message carries the indication information.

Specifically, the second base station communicates with the first base station through the X2 interface, that is, the second base station sends the second base station The sending module sends the X2 interface modification request message (X2modify request) to the first base station by using the X2 interface, where the X2 interface modification request message carries the indication information.

After receiving the X2 interface modification request message sent by the second base station, the first base station sends an X2 modify response message to the second base station. When the UE moves from the first MBSFN area to another MBSFN area, if the first base station determines that the current UE cannot receive the first MBMS service on the broadcast frequency of the first MBSFN area or receives the broadcast first MBMS service When the signal strength of the first base station is weak, and the first base station learns that the service currently broadcasted by the second MBSFN area is the first MBMS service, the first base station may present the UE from the UE according to the indication information. The base station of the MBSFN area is handed over to the second MBSFN area, so that the UE continues to receive the first MBMS service on the second MBSFN area, so that the UE can continuously receive the first MBMS service during the mobile process.

On the basis of the foregoing embodiment, as a third possible implementation manner of the embodiment of the present invention, the embodiment relates to a specific process in which the sending module sends the indication information to the first base station by using the network element device. The network element device may be an MCE that jointly manages the first base station and the second base station. For example, refer to the network topology diagram shown in FIG. 4. Further, the foregoing sending module is configured to send the MBMS scheduling information to the first base station by using the MCE, where the MBMS scheduling information is that the MCE is configured according to the received M2 interface setup request message sent by the base station. The information is sent to the first base station, where the indication information is carried in both the M2 interface setup request message and the MBMS scheduling information.

The sending module sends an M2 interface setup request message (M2setup request) to the MCE through the M2 interface, where the M2 interface setup request message carries the indication information. After receiving the M2 interface setup request message sent by the second base station, the MCE sends an M2 interface setup response message (M2setup response) to the second base station, and carries the indication information in the M2 interface setup request message in the MBMS scheduling information (MBMS scheduling). Information) is sent to the first base station. After receiving the MBMS scheduling information, the first base station reads the indication information in the MBMS scheduling information to learn the service type currently being broadcast in the second MBSFN area, and sends the MBMS to the MCE. MBMS scheduling information response.

When the UE moves from the first MBSFN area to another MBSFN area, if the first base station determines that the first MBMS service cannot be received on the broadcast frequency of the first MBSFN area or receives the first MBMS service, When the signal strength of the first base station is weak, and the first base station learns that the service currently broadcasted by the second MBSFN area is the first MBMS service according to the indication information, the first base station may, according to the indication information, the UE is currently located by the UE. The base station of the MBSFN area is handed over to the base station in the second MBSFN area, so that the UE continues to receive the first MBMS service on the second MBSFN area, so that the UE can continuously receive the first MBMS service during the mobile process.

On the basis of the foregoing embodiment, as a fourth possible implementation manner of the embodiment of the present invention, the embodiment relates to another specific process in which the sending module sends the indication information to the first base station by using the network element device. The network element device includes a first MCE, a second MCE, a first MME, and a second MME. Referring to the network topology diagram shown in FIG. 5, in FIG. 5, the first MCE scheduling management first base station, and the second MCE scheduling management The second base station, and the first MME manages the first MCE, and the second MME manages the second MCE. Optionally, the first MME and the second MME in FIG. 5 may also be the same MME, that is, the embodiment is also applicable to a scenario in which the first MCE and the second MCE are managed by the same MME. The following technical solution is described by taking a scenario in which the first MME manages the first MCE and the second MME manages the second MCE.

Further, the sending module is configured to send the MBMS scheduling information to the first base station by using the first MCE, where the MBMS scheduling information is sent by the first MCE according to the received first MME. The M3 interface reset message is sent to the first base station, and the M3 interface reset message is sent by the first MME to the first MCE according to the received indication information sent by the second MME. The indication information is sent by the second MME to the first MME according to the received M3 interface setup request message sent by the second MCE, where the M3 interface setup request message is the second MCE. The M2 interface setup request message sent by the received base station (ie, the second base station) is sent to the second MME; the M2 interface setup request message, the M3 interface setup request message, and the M3 interface are heavy The indication information is carried in both the message and the MBMS scheduling information.

The sending module sends the M2 interface setup request message (M2setup request) to the second MCE through the M2 interface, where the M2 interface setup request message carries the indication information. After receiving the M2 interface setup request message sent by the sending module, the second MCE sends an M2 interface setup response message (M2setup response) to the second base station, and carries the indication information in the M2 interface setup request message in the M3 interface setup request message. (M3setup request) is sent to the second MME.

After receiving the MBMS scheduling information, the first base station reads the indication information in the MBMS scheduling information to learn the service type currently being broadcast in the second MBSFN area, and sends an MBMS scheduling information response to the MCE. .

When the UE moves from the first MBSFN area to another MBSFN area, if the first base station determines that the current UE cannot receive the first MBMS service on the broadcast frequency of the first MBSFN area or receives the broadcast first MBMS service When the signal strength of the first base station is weak, and the first base station learns that the service currently broadcasted by the second MBSFN area is the first MBMS service, the first base station may present the UE from the UE according to the indication information. The base station of the MBSFN area is handed over to the base station in the second MBSFN area, so that the UE continues to receive the first MBMS service on the second MBSFN area, so that the UE can continuously receive the first MBMS service during the mobile process.

The base station provided by the embodiment of the present invention sends a second base station to the first base station to indicate the second The service currently broadcasted by the MBSFN area is the indication information of the first MBMS service. If the first base station determines that the UE leaves the first MBSFN area served by the first base station, the first base station switches the user equipment from the base station of the current MBSFN area according to the indication information. Up to the second MBSFN area, so that the UE continues to receive the first MBMS service on the second MBSFN area, so that the UE can continuously receive the first MBMS service during the mobile process, ensuring continuity of the service.

FIG. 6 is a schematic flowchart diagram of Embodiment 1 of a method for maintaining service continuity according to the present invention. As shown in FIG. 6, the method includes:

S101: The first base station serving the first MBSFN area broadcasts the first MBMS service to the user equipment.

S102: The first base station receives the indication information that is sent by the second base station that serves the second MBSFN area, where the indication information is used to indicate that the service currently broadcasted by the second MBSFN area is the first MBMS service.

Specifically, when the second MBSFN area starts to broadcast the first MBMS service, the second MBSFN area sends the indication information to the first base station by using the second base station, that is, the first base station is indicated by the indication information to the current broadcast service of the second MBSFN area. It is the first MBMS service. It should be noted that the base station in the second MBSFN area broadcasts the first MBMS service, and the second base station in the second MBSFN area may broadcast the first MBMS service, or may be other than the second base station in the second MBSFN area. The base station broadcasts the first MBMS service; that is, as long as the MBMS service starts broadcasting in the second MBSFN area, the second MBSFN area sends the indication information to the first base station by using the second base station to indicate to the first base station that the second MBSFN area is currently The type of MBMS service broadcast. In addition, the second base station is a neighboring base station of the first base station, and the second base station may be one or more. Therefore, the indication information may be one or multiple, that is, the first base station. There may be multiple different neighbor base stations.

S103: When the user equipment leaves the first MBSFN area, the first base station switches the user equipment from a base station of a current MBSFN area to the second MBSFN area according to the indication information, so that the The user equipment receives the first MBMS service on the second MBSFN area.

Specifically, after receiving the indication information sent by the second base station, the first base station determines, according to the indication information, that the second MBSFN area currently broadcasts the first MBMS service, and the first base station The station records or temporarily stores the indication information. When the UE in the first MBSFN area leaves the first MBSFN area (where the leaving the first MBSFN area may move the UE to any MBSFN area except the first MBSFN area, the UE may also move to the first MBSFN area. The edge region is that the UE cannot receive the first MBMS service broadcast by the first base station or the first base station that receives the first MBMS service is weak, and the first base station switches the UE to the current according to the indication information. The second MBSFN area of the first MBMS service is being broadcasted to ensure that the UE receives the first MBMS service continuity. It should be noted that, here, the UE is switched to the second MBSFN area, and actually the user equipment is switched to the base station in the second MBSFN area. Optionally, when the second base station is currently broadcasting the first MBMS service, the first base station may switch the UE to the second base station according to the indication information; optionally, when other base stations in the second MBSFN area are currently broadcasting, For the first MBMS service, the first base station may switch the UE to other base stations in the second MBSFN area that are broadcasting the first MBMS service according to the indication information sent by the second base station.

Referring to FIG. 2, the UE is currently in the first MBSFN area, and the UE is receiving the first MBMS service broadcast by the first base station on the first system frequency. When the UE moves from the first MBSFN area to the other MBSFN area, it is assumed that the UE moves to the edge of the first MBSFN area shown in FIG. 2, and is about to enter the third MBSFN area, and the UE does not receive the first system frequency. If the signal strength of the first MBMS service broadcasted by a base station or the first base station that receives the first MBMS service is weak (while the first MBMS service is still the service of interest to the UE), the UE reports itself to the first base station. The current communication quality, for example, may be reported by measurement report, or may be reported to the first base station by other information. After the first base station learns that the current communication quality of the UE is poor, the first base station learns, according to the indication information sent by the second base station, that the service currently being broadcast in the second MBSFN area is the first MBMS service. Therefore, in order to ensure that the UE receives the continuity of the first MBMS service, the first base station switches the UE from the base station of the current third MBSFN area to the second MBSFN area. Optionally, the first base station may notify, by using a corresponding handshake protocol or signaling, that the UE should currently establish communication with the base station that broadcasts the first MBMS service in the second MBSFN area, thereby switching the UE to the second MBSFN area, thereby enabling The UE may continue to receive the first MBMS service on the second MBSFN area, ensuring that the UE receives the continuity of the first MBMS service. It should be noted that, if the first base station finally determines that the UE can switch to multiple base stations in the second MBSFN area, the first base station may select one base station and the UE from the current third. The base station of the MBSFN area switches to the base station.

In the prior art, when the UE moves from the first MBSFN area to another MBSFN area, and the UE is still interested in the first MBMS service broadcast by the first base station, but the UE cannot be in the first place due to the movement of the UE. The signal strength of the first base station that receives the first MBMS service or receives the first MBMS service broadcast is weak on the broadcast frequency of the MBSFN area, but the first base station in the prior art cannot know other base stations except itself. Which of the current base stations is currently broadcasting the first MBMS service, and therefore cannot handover the UE to the correct target base station, thereby causing the UE to receive the first MBMS service interruption; however, in the present invention, since the second base station will be the second MBSFN The service currently broadcasted by the area is notified to the first base station by the indication information. Therefore, when the UE cannot receive the first MBMS service during the mobile process or the signal strength of the first base station that receives the first MBMS service is weak, the first base station The UE may be switched from the base station of the currently located MBSFN area to the second MBSFN area according to the indication information, and continue to receive the first MBMS service on the second MBSFN area. So that the UE may not receive the first MBMS service interruption, to ensure continuity of the first UE receiving the MBMS service.

The method for maintaining the continuity of the service provided by the embodiment of the present invention, the first base station receives the indication information that is sent by the second base station to indicate that the service currently broadcasted in the second MBSFN area is the first MBMS service, and if the first base station determines that the UE leaves the When the first MBSFN area is served by the base station, the first base station switches the user equipment from the base station of the current MBSFN area to the second MBSFN area according to the indication information, so that the UE continues to receive the first MBMS service on the second MBSFN area, thereby The UE can continuously receive the MBMS service during the mobile process, ensuring the continuity of the service.

Further, on the basis of the foregoing embodiment, before the first base station switches the user equipment from the current MBSFN area to the second MBSFN area, the first base station further selects to switch the UE to the second MBSFN area according to the indication information. That is, when the UE leaves the first MBSFN area, the first base station informs the UE that the second MBSFN area should be selected according to the indication information, and establishes communication with the base station in the second MBSFN area, thereby continuing to receive the second MBSFN area. An MBMS service.

Optionally, when the indication information is the service information of the service currently broadcasted by the second MBSFN area and the identifier of the second base station, when the first base station determines that the UE leaves the first MBSFN area, The UE is handed over to the second base station according to the indication information, that is, the second base station in the second MBSFN area is currently broadcasting the first MBMS service. It should be noted that, even if other base stations in the second MBSFN area are currently broadcasting the first MBMS service, the first base station still switches the UE to the second base station according to the identifier of the second base station. The identifier of the second base station may be the SAI corresponding to the second base station, and may be other identifiers of the second base station, as long as the first base station can identify the second base station according to the identifier.

Optionally, when the indication information is the service information of the service currently broadcasted by the second MBSFN area and the second system frequency of the second base station, when the first base station determines that the UE leaves the first MBSFN area, according to the indication information and the The configuration information of a base station (for example, the first system frequency of the first base station) selects a suitable target base station in the second MBSFN area (the target base station is currently broadcasting the first MBMS service), and switches the UE to the target in the second MBSFN area. Base station. It should be noted that even if the first MBSFN service is being broadcasted on the current second base station, the first base station will still select the appropriate target base station to perform handover. Of course, if the target base station determined by the first base station is the second base station, the first base station switches the UE to the second base station.

It should be noted that the service information of the service currently broadcasted by the second MBSFN area included in the foregoing indication information may be a Temporary Mobile Group Identity (TMGI) of the service, and may also be an attribute of the service. The information may also be other identifiers of the service, as long as the first base station can identify the service type of the service according to the service information.

On the basis of the foregoing embodiment, as a possible implementation manner of the embodiment of the present invention, the embodiment relates to a process in which the first base station obtains the indication information from a base station configuration update request message sent by the second base station. Further, the above S101 is specifically: the first base station receives the base station configuration update request message sent by the second base station, and the base station configuration update request message carries the indication information.

Specifically, the second base station communicates with the first base station by using the X2 interface, that is, the second base station sends an eNB configuration update request message to the first base station by using the X2 interface, where the base station configuration update request message carries the foregoing Instructions.

After receiving the base station configuration update request message sent by the second base station, the first base station sends a base station configuration update response message (eNB configuration update) to the second base station. When the UE moves from the first MBSFN area to another MBSFN area, if the first base station determines the current UE When the first MBMS service is not received on the broadcast frequency of the first MBSFN area or the signal strength of the first base station that receives the first MBMS service is weak, the first base station learns the second MBSFN area according to the indication information. The currently broadcasted service is the first MBMS service, and the first base station may switch the UE from the base station of the MBSFN area where the UE is currently located to the base station in the second MBSFN area according to the foregoing indication information, so that the UE is in the second The first MBMS service continues to be received on the MBSFN area, so that the UE can continuously receive the first MBMS service during the mobile process.

Optionally, the first base station may determine, by using a TMGI of the service currently broadcasted by the second MBSFN area that is carried in the information, whether the current broadcast service of the second MBSFN area is the first MBMS service, that is, the first base station may The TMGI of the service is compared with the TMGI of the first MBMS service broadcasted by itself, and the service currently broadcasted in the second MBSFN area is determined to be the first MBMS service.

On the basis of the foregoing embodiment, as another possible implementation manner of the embodiment of the present invention, the embodiment relates to a process in which the first base station obtains the indication information from an X2 interface modification request message sent by the second base station. Further, the foregoing S101 is specifically: the first base station receives the X2 interface modification request message sent by the second base station, and the X2 interface modification request message carries the indication information.

After receiving the X2 interface modification request message sent by the second base station, the first base station sends an X2 modify response message to the second base station. When the UE moves from the first MBSFN area to another MBSFN area, if the first base station determines that the current UE cannot receive the first MBMS service on the broadcast frequency of the first MBSFN area or receives the broadcast first MBMS service When the signal strength of the first base station is weak, and the first base station learns that the service currently broadcasted by the second MBSFN area is the first MBMS service, the first base station may present the UE from the UE according to the indication information. The base station of the MBSFN area is handed over to the base station in the second MBSFN area, so that the UE continues to receive the first MBMS service on the second MBSFN area, so that the UE can continuously receive the first MBMS service during the mobile process.

On the basis of the foregoing embodiment, as a third possible implementation manner of the embodiment of the present invention, the embodiment relates to a specific process for the first base station to receive the indication information sent by the second base station by using the network element device, where the network element The device is a Multi-cell/Multicast Coordination Entity (MCE). For details, see the network topology shown in Figure 4. In Figure 4, the first base station and the second base station are scheduled and managed by a common MCE. . Further, the foregoing S101 includes: the first base station receives the MBMS scheduling information that is sent by the second base station by using the MCE, where the MBMS scheduling information is that the MCE sends the M2 according to the received second base station. The interface setup request message is sent to the first base station, and the indication information is carried in both the M2 interface setup request message and the MBMS scheduling information.

The second base station sends an M2 interface setup request message (M2setup request) to the MCE through the M2 interface, where the M2 interface setup request message carries the indication information.

After receiving the M2 interface setup request message sent by the second base station, the MCE sends an M2 interface setup response message (M2setup response) to the second base station, and carries the indication information in the M2 interface setup request message in the MBMS scheduling information (MBMS scheduling). Information) is sent to the first base station. After receiving the MBMS scheduling information, the first base station reads the indication information in the MBMS scheduling information to learn the service type currently being broadcast in the second MBSFN area, and sends an MBMS scheduling information response to the MCE. .

When the UE moves from the first MBSFN area to another MBSFN area, if the first base station determines that the current UE cannot receive the first MBMS service on the broadcast frequency of the first MBSFN area or receives the broadcast first MBMS service When the signal strength of the first base station is weak, the first base station learns that the service currently broadcast in the second MBSFN area is the first according to the indication information. The MBMS service, the first base station may switch the UE from the base station of the MBSFN area where the UE is currently located to the base station in the second MBSFN area according to the foregoing indication information, so that the UE continues to receive the first on the second MBSFN area. The MBMS service enables the UE to continuously receive the first MBMS service during the mobile process.

On the basis of the foregoing embodiment, as a fourth possible implementation manner of the embodiment of the present invention, the embodiment relates to a specific process for the first base station to receive the indication information sent by the second base station by using the network element device, where the network element The device includes a first MCE, a second MCE, a first Mobility Management Entity (MME), and a second MME. See the network topology diagram shown in FIG. 5, and the first MCE scheduling management in FIG. The first base station, the second MCE schedules management of the second base station, and the first MME manages the first MCE, and the second MME manages the second MCE. Optionally, the first MME and the second MME in FIG. 5 may also be the same MME, that is, the embodiment is also applicable to a scenario in which the first MCE and the second MCE are managed by the same MME. The following technical solution is described by taking a scenario in which the first MME manages the first MCE and the second MME manages the second MCE.

Further, the foregoing S101 specifically includes: the first base station receives the MBMS scheduling information that is sent by the second base station by using the first MCE, where the MBMS scheduling information is the first MCE according to the received first The M3 interface reset message sent by the MME is sent to the first base station, and the M3 interface reset message is sent by the first MME according to the received indication information sent by the second MME to the first MME. In the MCE, the indication information is sent by the second MME to the first MME according to the received M3 interface setup request message sent by the second MCE, where the M3 interface setup request message is the And sending, by the second MCE, the M2 interface setup request message sent by the second base station to the second MME, the M2 interface setup request message, the M3 interface setup request message, and the M3 interface reset message. And the indication information is carried in both the MBMS scheduling information.

After receiving the MBMS scheduling information, the first base station reads the indication information in the MBMS scheduling information to learn the service type of the service currently being broadcast in the second MBSFN area, and sends an MBMS scheduling information response (MBMS) to the first MCE. Scheduling information response).

Optionally, the first base station may determine, by using a TMGI of the service currently broadcasted by the second MBSFN area that is carried in the information, whether the current broadcast service of the second MBSFN area is the first MBMS service, that is, the first base station may The TMGI of the service is compared with the TMGI of the first MBMS service broadcasted by itself, and the service currently broadcasted in the second MBSFN area is determined to be the first MBMS service. .

Embodiment 2 of the present invention provides a method for maintaining business continuity. The embodiment of the invention relates to a specific process for the first base station to ensure that the UE receives the continuity of the first MBMS service during the MBSFN inter-area movement. The method includes: transmitting, by the second base station serving the second multicast broadcast single frequency network MBSFN area, the indication information to the first base station serving the first MBSFN area; wherein the first base station currently broadcasts the first MBMS to the user equipment The service, the indication information is used to indicate that the service currently broadcast by the second MBSFN area is the first MBMS service.

Specifically, when the second MBSFN area starts to broadcast the first MBMS service, the second MBSFN area sends the indication information to the first base station by using the second base station, that is, the indication information is used to indicate to the first base station that the current broadcast service of the MBSFN area is the first An MBMS service. It should be noted that the base station in the second MBSFN area broadcasts the first MBMS service, and the second base station in the second MBSFN area may broadcast the first MBMS service, or may be other than the second base station in the second MBSFN area. The base station broadcasts the first MBMS service; that is, as long as the MBMS service starts broadcasting in the second MBSFN area, the second MBSFN area sends the indication information to the first base station by using the second base station to indicate to the first base station that the second MBSFN area is currently The type of MBMS service broadcast. In addition, the second base station is a neighboring base station of the first base station, and the second base station may be one or more. Therefore, the indication information may be one or multiple. That is, the first base station may have multiple different neighbor base stations.

After receiving the indication information sent by the second base station, the first base station according to the indication signal It is determined that the second MBSFN area currently broadcasts the first MBMS service, and the first base station records or temporarily stores the indication information. When the UE in the first MBSFN area leaves the first MBSFN area (where the leaving the first MBSFN area may move the UE to any MBSFN area except the first MBSFN area, the UE may also move to the first MBSFN area. In the edge area, the UE may not receive the first MBMS service broadcast by the first base station or the first base station that broadcasts the first MBMS service is weak, and the first base station may switch the UE to the indication according to the indication information. The second MBSFN area of the first MBMS service is currently being broadcasted to ensure that the UE receives the first MBMS service continuity. Optionally, when the second base station is currently broadcasting the first MBMS service, the first base station may switch the UE to the second base station according to the indication information; optionally, when other base stations in the second MBSFN area are currently broadcasting, For the first MBMS service, the first base station may switch the UE to other base stations in the second MBSFN area that are broadcasting the first MBMS service according to the indication information sent by the second base station. For details, refer to the description of the embodiment shown in FIG. 6 above, and details are not described herein again.

The method for maintaining the continuity of the service provided by the embodiment of the present invention, the second base station sends, to the first base station, indication information for indicating that the service currently broadcasted by the second MBSFN area is the first MBMS service, if the first base station determines that the UE leaves the first When the first MBSFN area is served by the base station, the first base station switches the user equipment from the base station of the current MBSFN area to the second MBSFN area according to the indication information, so that the UE continues to receive the first MBMS service on the second MBSFN area. Therefore, the UE can continuously receive the first MBMS service during the mobile process, thereby ensuring continuity of the service.

Further, the foregoing indication information may include service information of a service currently broadcast by the second MBSFN area, and an identifier of the second base station or a second system frequency of the second base station.

Optionally, when the indication information is the service information of the service currently broadcasted by the second MBSFN area and the identifier of the second base station, the first base station, when determining that the UE leaves the first MBSFN area, switches the UE according to the indication information. To the second base station, that is to say the second base station in the second MBSFN area is currently broadcasting the first MBMS service. It should be noted that, even if other base stations in the second MBSFN area are currently broadcasting the first MBMS service, the first base station still switches the UE to the second base station according to the identifier of the second base station. The identifier of the second base station may be the SAI corresponding to the second base station, and may be other identifiers of the second base station, as long as the first base station can identify the second base station according to the identifier.

Optionally, when the foregoing indication information is a service letter of a service currently broadcast in the second MBSFN area And the second base station frequency of the second base station, when determining that the UE leaves the first MBSFN area, according to the indication information and configuration information of the first base station (for example, the first system frequency of the first base station) is in the second Selecting a suitable target base station in the MBSFN area (the target base station is currently broadcasting the first MBMS service) switches the UE to the target base station in the second MBSFN area. It should be noted that even if the first MBSFN service is being broadcasted on the current second base station, the first base station will still select the appropriate target base station to perform handover. Of course, if the target base station determined by the first base station is the second base station, the first base station switches the UE to the second base station.

On the basis of the above-mentioned embodiments, as a possible implementation manner of the embodiment of the present invention, the embodiment relates to a process in which the second base station carries the indication information in the base station configuration update request message and sends the information to the first base station. Further, the sending, by the second base station, the indication information to the first base station may include: the second base station sending a base station configuration update request message to the first base station, where the base station configuration update request message carries the indication information.

On the basis of the foregoing embodiment, as another possible implementation manner of the embodiment of the present invention, the embodiment relates to a process in which the second base station carries the indication information in the X2 interface modification request message and sends the information to the first base station. Further, the sending, by the second base station, the indication information to the first base station may include: the second base station sending an X2 interface request message to the first base station, where the X2 interface request message carries the indication information.

On the basis of the foregoing embodiment, as a third possible implementation manner of the embodiment of the present invention, the embodiment relates to a specific process in which the second base station sends the indication information to the first base station by using the network element device. The network element device may be an MCE that jointly manages the first base station and the second base station. For example, refer to the network topology diagram shown in FIG. 4. Further, the sending, by the second base station, the indication information to the first base station may include: the second base station sending the MBMS scheduling information to the first base station by using the MCE, where the MBMS scheduling information is the MCE according to the receiving And sending, by the second base station, an M2 interface setup request message to the first base station, where the M2 interface setup request message and the MBMS scheduling information both carry the indication information.

The second base station sends an M2 interface setup request message (M2setup request) to the MCE through the M2 interface, where the M2 interface setup request message carries the indication information. After receiving the M2 interface setup request message sent by the second base station, the MCE sends an M2 interface setup response message (M2setup response) to the second base station, and carries the indication information in the M2 interface setup request message in the MBMS scheduling information (MBMS scheduling). Information) is sent to the first base station. After receiving the MBMS scheduling information, the first base station reads the indication information in the MBMS scheduling information to learn the service type currently being broadcast in the second MBSFN area, and sends an MBMS scheduling information response to the MCE. .

On the basis of the foregoing embodiment, as a fourth possible implementation manner of the embodiment of the present invention, the embodiment relates to a specific process in which the second base station sends the indication information to the first base station by using the network element device. The network element device includes a first MCE, a second MCE, a first MME, and a second MME. For example, refer to the network topology diagram shown in FIG. 5 above. The following technical solution is described by taking a scenario in which the first MME manages the first MCE and the second MME manages the second MCE.

Further, the sending, by the second base station, the indication information to the first base station may include: sending, by the second base station, the MBMS scheduling information to the first base station by using the first MCE, where the MBMS scheduling information is the An MCE sends the M3 interface reset message sent by the first MME to the first base station, where the M3 interface reset message is sent by the first MME according to the received second MME. The indication information is sent to the first MCE, and the indication information is sent by the second MME to the first MME according to the received M3 interface setup request message sent by the second MCE. The M3 interface setup request message is sent by the second MCE according to the received M2 interface setup request message sent by the second base station. The M2 interface setup request message, the M3 interface setup request message, the M3 interface reset message, and the MBMS scheduling information are all sent to the second MME.

Specifically, when the first base station and the second base station are scheduled and managed by different MCEs, the first base station and the second base station can communicate with each other through different MCEs; when two MCEs are managed by different MMEs, two different The MCE can communicate with each other through the MME. In this embodiment, the MeNB can interact with the MCE through the M2 interface, and the MCE and the MME can interact with each other through the M3 interface. The two different MMEs can interact with each other through the S10 interface.

When the UE moves from the first MBSFN area to another MBSFN area, if the first base station determines that the current UE cannot receive the first MBMS service on the broadcast frequency of the first MBSFN area or receives the broadcast first MBMS service When the signal strength of the first base station is weak, and the first base station learns that the service currently broadcasted by the second MBSFN area is the first MBMS service, the first base station may present the UE from the UE according to the indication information. of The base station of the MBSFN area is handed over to the base station in the second MBSFN area, so that the UE continues to receive the first MBMS service on the second MBSFN area, so that the UE can continuously receive the first MBMS service during the mobile process.

The method for maintaining the continuity of the service provided by the embodiment of the present invention, the second base station sends, to the second base station, indication information indicating that the service currently broadcasted by the second MBSFN area is the first MBMS service, if the first base station determines that the UE leaves the first When the first MBSFN area is served by the base station, the first base station switches the user equipment from the base station of the current MBSFN area to the second MBSFN area according to the indication information, so that the UE continues to receive the first MBMS service on the second MBSFN area. Therefore, the UE can continuously receive the first MBMS service during the mobile process, thereby ensuring continuity of the service.

FIG. 7 is a signaling flowchart of Embodiment 3 of a method for maintaining service continuity according to the present invention. As shown in FIG. 7, the method includes:

S201: The first base station broadcasts the first MBMS service to the user equipment.

S202. The second base station sends a base station configuration update request message to the first base station, where the base station configuration update request message carries the indication information, where the indication information is used to indicate that the service currently broadcasted by the second MBSFN area is the first MBMS business.

S203: The first base station sends a base station configuration update response message to the second base station.

S204: When the user equipment leaves the first MBSFN area, the first base station switches the user equipment from the base station of the current MBSFN area to the second MBSFN area according to the indication information, so that the user equipment Receiving the first MBMS service on the second MBSFN area.

For the specific implementation of the method provided by the embodiment of the present invention, refer to the first possible implementation manner of the foregoing embodiment shown in FIG. 6 , and details are not described herein again.

FIG. 8 is a signaling flowchart of Embodiment 4 of a method for maintaining service continuity according to the present invention. As shown in Figure 8, the method includes:

S301: The first base station broadcasts the first MBMS service to the user equipment.

S302: The second base station sends an X2 interface modification request message to the first base station, where the X2 interface modification request message carries the indication information, where the indication information is used to indicate that the service currently broadcasted by the second MBSFN area is the first MBMS business.

S303: The first base station sends an X2 modification response message to the second base station.

S304: When the user equipment leaves the first MBSFN area, the first base station switches the user equipment from the base station of the current MBSFN area to the second MBSFN area according to the indication information, so that the user equipment Receiving the first MBMS service on the second MBSFN area.

For the specific implementation of the method provided by the embodiment of the present invention, refer to the second possible implementation manner of the foregoing embodiment shown in FIG. 6 , and details are not described herein again.

FIG. 9 is a signaling flowchart of Embodiment 5 of a method for maintaining service continuity according to the present invention. The embodiment is related to the specific process of the first base station receiving the indication information sent by the second base station by using the network element device. The network element device is an MCE, and the network topology diagram shown in FIG. 4 can be referred to. As shown in FIG. 9, the method includes:

S401: The first base station broadcasts the first MBMS service to the user equipment.

S402: The second base station sends an M2 interface setup request message to the MCE, where the M2 interface setup request message carries the indication information, where the indication information is used to indicate that the service currently broadcasted by the second MBSFN area is the first MBMS. business.

S403: The MCE sends an M2 interface setup response message to the second base station.

S404: The MCE sends the MBMS scheduling information that carries the indication information to the first base station, where the indication information is carried in the MBMS scheduling information.

S405: The first base station sends an MBMS scheduling information response to the MCE.

S406: When the user equipment leaves the first MBSFN area, the first base station switches the user equipment from the base station of the current MBSFN area to the second MBSFN area according to the indication information, so that the user equipment Receiving the first MBMS service on the second MBSFN area.

For the specific implementation of the method provided by the embodiment of the present invention, refer to the third possible implementation manner of the foregoing embodiment shown in FIG. 6 , and details are not described herein again.

FIG. 10 is a signaling flowchart of Embodiment 6 of a method for maintaining service continuity according to the present invention. The embodiment relates to a specific process of the first base station receiving the indication information sent by the second base station by using the network element device, where the network element device includes a first MCE, a second MCE, a first MME, and a second MME, where See the network topology diagram shown in Figure 5. As shown in FIG. 10, the method includes:

S501: The first base station broadcasts the first MBMS service to the user equipment.

S502: The second base station sends an M2 interface setup request message to the second MCE, where the M2 interface setup request message carries the indication information, where the indication information is used to indicate that the service currently broadcasted by the second MBSFN area is the first MBMS business.

S503: The second MCE sends an M2 interface setup response message to the second base station.

S504: The second MCE sends an M3 interface setup request message to the second MME, where the M3 interface setup request message carries the indication information.

S505: The second MME sends an M3 interface setup response message to the second MCE.

S506: The second MME sends the indication information to the first MME.

S507: The first MME sends an M3 interface reset message that carries the indication information to the first MCE.

S508: The first MCE sends an M3 interface reset confirmation message to the first MME.

S509: The first MCE sends MBMS scheduling information to the first base station, where the MBMS scheduling information carries the indication information.

S510: The first base station sends an MBMS scheduling information response to the first MCE.

S511: When the user equipment leaves the first MBSFN area, the first base station switches the user equipment from the base station of the current MBSFN area to the second MBSFN area according to the indication information, so that the user equipment Receiving the first MBMS service on the second MBSFN area.

For the implementation of the method provided by the embodiment of the present invention, refer to the fourth possible implementation manner of the foregoing embodiment shown in FIG. 6 , and details are not described herein again.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

FIG. 11 is a schematic structural diagram of Embodiment 3 of a base station according to the present invention. The base station may be the first base station in the method embodiment, and the base station may include: a transmitter 20, a receiver 21, and a processor 22.

The transmitter 20 is configured to broadcast the first multimedia broadcast multicast MBMS service to the user equipment. The receiver 21 is configured to receive the indication information that is sent by the second base station that serves the second MBSFN area, where the indication information is used to indicate that the service currently broadcasted by the second MBSFN area is the first MBMS service; The processor 22 is configured to, when the user equipment leaves the first MBSFN area, switch the user equipment from a base station of a current MBSFN area to the second MBSFN area according to the indication information, so that the user The device receives the first MBMS service on the second MBSFN area.

The base station provided by the embodiment of the present invention may perform the foregoing method embodiments, and the implementation principle and technical effects are similar, and details are not described herein again.

Further, the processor 22 is further configured to: switch the user equipment to the second MBSFN area according to the indication information, before the user equipment is switched from the current MBSFN area to the second MBSFN area. .

Further, the receiver 21 is configured to receive a base station configuration update request message sent by the second base station, where the base station configuration update request message carries the indication information, or is specifically used to receive the second base station. The sent X2 interface modifies the request message, where the X2 interface modification request message carries the indication information, or is specifically used to receive the indication information sent by the second base station by using the network element device.

Optionally, if the network element device is a multi-cell multicast coordination entity (MCE), the receiver 21 is configured to receive MBMS scheduling information sent by the second base station by using the MCE, where the MBMS scheduling is performed. The information is sent by the MCE to the base station according to the received M2 interface setup request message sent by the second base station, where the M2 interface setup request message and the MBMS scheduling information both carry the indication information.

Optionally, if the network element device includes the first multi-cell multicast coordination entity MCE, the second MCE, the first mobility management network element MME, and the second MME, the receiver 21 is specifically configured to receive the second The MBMS scheduling information sent by the base station by the first MCE, where the MBMS scheduling information is sent by the first MCE to the base station according to the received M3 interface reset message sent by the first MME. The M3 interface reset message is sent by the first MME to the first MCE according to the received indication information sent by the second MME, and the indication information is received by the second MME according to the received The M3 interface setup request message sent by the second MCE is sent to the first MME, and the M3 interface setup request message is sent by the second MCE according to the received M2 interface setup request message sent by the second base station. Sent to the second The indication information is carried in the M2 interface setup request message, the M3 interface setup request message, the M3 interface reset message, and the MBMS scheduling information.

Further, the indication information includes service information of a service currently broadcast by the second MBSFN area, and an identifier of the second base station or a second system frequency of the second base station.

Optionally, when the indication information is the service information of the service currently broadcasted by the second MBSFN area and the identifier of the second base station, the processor 22 is specifically configured to leave the user equipment When an MBSFN area is used, the user equipment is switched to the second base station according to the indication information.

Optionally, when the indication information is the service information of the service currently broadcasted by the second MBSFN area and the second system frequency of the second base station, the processor 22 is specifically configured to leave in the user equipment. In the first MBSFN area, the user equipment is switched to the target base station in the second MBSFN area according to the indication information and the configuration information of the first base station.

The fourth embodiment of the present invention provides a base station, where the base station serves the second MBSFN area, and the base station may be the second base station in the foregoing method embodiment, where the base station may include: a transmitter, configured to serve the first MBSFN area. The base station sends the indication information, where the first base station currently broadcasts the first MBMS service to the user equipment, and the indication information is used to indicate that the service currently broadcasted by the second MBSFN area is the first MBMS service.

Further, the transmitter is specifically configured to send a base station configuration update request message to the first base station, where the base station configuration update request message carries the indication information, or is specifically used to send the X2 to the first base station. An interface request message, where the X2 interface request message carries the indication information, or is specifically used to send indication information to the first base station by using a network element device.

Optionally, if the network element device is a multi-cell multicast coordination entity (MCE), the transmitter is configured to send MBMS scheduling information to the first base station by using the MCE, where the MBMS scheduling information is The MCE sends the M2 interface setup request message sent by the base station to the first base station, where the M2 interface setup request message and the MBMS scheduling information both carry the indication information.

Optionally, if the network element device includes the first multi-cell multicast coordination entity MCE, the second MCE, the first mobility management network element MME, and the second MME, the transmitter is specifically configured to pass the first MCE. Transmitting the MBMS scheduling information to the first base station, where the MBMS scheduling information is sent by the first MCE to the first base station according to the received M3 interface reset message sent by the first MME. The M3 interface reset message is sent by the first MME to the first MCE according to the received indication information sent by the second MME, and the indication information is received by the second MME according to the received The M3 interface setup request message sent by the second MCE is sent to the first MME, and the M3 interface setup request message is sent by the second MCE according to the received M2 interface setup request message sent by the base station. The indication information is carried in the M2 interface setup request message, the M3 interface setup request message, the M3 interface reset message, and the MBMS scheduling information of the second MME.

Further, the indication information includes service information of a service currently broadcast by the second MBSFN area, and an identifier of the base station or a second system frequency of the base station. The identifier of the base station is used to enable the first base station to switch the user equipment to the base station when determining that the user equipment leaves the first MBSFN area; the second system frequency of the base station is used by And causing the first base station to switch the user equipment to a target base station in the second MBSFN area when determining that the user equipment leaves the first MBSFN area.

FIG. 12 is a schematic structural diagram of a system embodiment for maintaining service continuity according to the present invention. As shown in FIG. 12, the system includes a user equipment 30, and further includes the first base station 31 described in the above embodiment and the second base station 32 described in the above embodiment. The user equipment, the first base station, and the second base station can establish a communication connection with each other through a wireless air interface.

The system for maintaining service continuity provided by the embodiment of the present invention may perform the foregoing method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A base station, comprising:

a sending module, configured to broadcast, to the user equipment, the first multimedia broadcast multicast MBMS service;

a receiving module, configured to receive the indication information that is sent by the second base station that serves the second MBSFN area, where the indication information is used to indicate that the service currently broadcasted by the second MBSFN area is the first MBMS service;

a processing module, configured to: when the user equipment leaves the first MBSFN area, switch the user equipment from a base station of a current MBSFN area to the second MBSFN area according to the indication information, so that the user equipment Receiving the first MBMS service on the second MBSFN area.
The base station according to claim 1, wherein the processing module is further configured to: select, according to the indication information, the user equipment before switching the user equipment from a current MBSFN area to the second MBSFN area The user equipment switches to the second MBSFN area.
The base station according to claim 1 or 2, wherein the receiving module is configured to receive a base station configuration update request message sent by the second base station, where the base station configuration update request message carries the indication information Or, specifically, for receiving the X2 interface modification request message sent by the second base station, where the X2 interface modification request message carries the indication information, or is specifically used for receiving, by the second base station, by using a network element device. Instructions.
The base station according to claim 3, wherein the receiving module is configured to receive the MBMS sent by the second base station by using the MCE, if the network element device is a multi-cell multicast coordination entity (MCE) Scheduling information, wherein the MBMS scheduling information is sent by the MCE to the base station according to the received M2 interface setup request message sent by the second base station, the M2 interface setup request message and the MBMS scheduling information. The indication information is carried in both.
The base station according to claim 3, wherein if the network element device comprises a first multi-cell multicast coordination entity MCE, a second MCE, a first mobility management network element MME, and a second MME, the receiving module Specifically, the MBMS scheduling information that is sent by the second base station by using the first MCE is received, where the MBMS scheduling information is that the first MCE resets according to the received M3 interface sent by the first MME. Sending the message to the base station, the M3 interface reset message is sent by the first MME to the first MCE according to the received indication information sent by the second MME, where the indication information is The second MME is based on the received location The M3 interface setup request message sent by the second MCE is sent to the first MME, and the M3 interface setup request message is sent by the second MCE according to the received M2 interface setup request message sent by the second base station. The indication information is carried in the M2 interface setup request message, the M3 interface setup request message, the M3 interface reset message, and the MBMS scheduling information of the second MME.
The base station according to any one of claims 1 to 5, wherein the indication information includes service information of a service currently broadcasted by the second MBSFN area, and an identifier of the second base station or the The second system frequency of the two base stations.
The base station according to claim 6, wherein when the indication information is the service information of the service currently broadcasted by the second MBSFN area and the identifier of the second base station, the processing module is specifically configured to be used in the When the user equipment leaves the first MBSFN area, the user equipment is switched to the second base station according to the indication information; or

When the indication information is the service information of the service currently broadcasted by the second MBSFN area and the second system frequency of the second base station, the processing module is specifically configured to leave the first MBSFN at the user equipment. In the case of the area, the user equipment is switched to the target base station in the second MBSFN area according to the indication information and the configuration information of the first base station.
A base station, wherein the base station serves a second multicast broadcast single frequency network MBSFN area, and the base station includes:

a sending module, configured to send indication information to a first base station serving the first MBSFN area, where the first base station currently broadcasts the first multimedia broadcast multicast MBMS service to the user equipment, where the indication information is used And indicating that the service currently broadcasted by the second MBSFN area is the first MBMS service.
The base station according to claim 8, wherein the sending module is configured to send a base station configuration update request message to the first base station, where the base station configuration update request message carries the indication information, or Specifically, the method is configured to send an X2 interface request message to the first base station, where the X2 interface request message carries the indication information, or is specifically used to send indication information to the first base station by using a network element device.
The base station according to claim 9, wherein, if the network element device is a multi-cell multicast coordination entity MCE, the sending module is specifically configured to send MBMS scheduling information to the first base station by using the MCE, The MBMS scheduling information is received by the MCE according to the And the M2 interface setup request message sent by the base station is sent to the first base station, where the indication information is carried in both the M2 interface setup request message and the MBMS scheduling information.
The base station according to claim 9, wherein if the network element device comprises a first multi-cell multicast coordination entity MCE, a second MCE, a first mobility management network element MME, and a second MME, the sending module Specifically, the MBMS scheduling information is sent to the first base station by using the first MCE, where the MBMS scheduling information is an M3 interface reset message sent by the first MCE according to the received first MME. The M3 interface reset message sent to the first base station is sent by the first MME to the first MCE according to the received indication information sent by the second MME. And sending, by the second MME, the M3 interface setup request message sent by the second MCE to the first MME, where the M3 interface setup request message is sent by the second MCE according to the received The M2 interface setup request message sent by the base station is sent to the second MME; the M2 interface setup request message, the M3 interface setup request message, the M3 interface reset message, and the MBMS scheduling information are carried in the M2 interface setup request message. Indicate the indication information.
The base station according to any one of claims 8 to 11, wherein the indication information includes service information of a service currently broadcasted by the second MBSFN area, and an identifier of the base station or a number of the base station. Two system frequencies.
The base station according to claim 12, wherein the identifier of the base station is used to enable the first base station to switch the user equipment to the user equipment when determining that the user equipment leaves the first MBSFN area Base station

The second system frequency of the base station is configured to enable the first base station to switch the user equipment to a target base station in the second MBSFN area when determining that the user equipment leaves the first MBSFN area.
A method for maintaining business continuity, characterized by comprising:

Serving the first multimedia broadcast multicast MBMS service to the user equipment by the first base station serving the first multicast broadcast single frequency network MBSFN area;

The first base station receives the indication information that is sent by the second base station that serves the second MBSFN area, where the indication information is used to indicate that the service currently broadcasted by the second MBSFN area is the first MBMS service;

When the user equipment leaves the first MBSFN area, the first base station according to the The indication information switches the user equipment from the base station of the current MBSFN area to the second MBSFN area, so that the user equipment receives the first MBMS service on the second MBSFN area.
The method according to claim 14, wherein the first base station further includes, before the first base station switches the user equipment from the base station of the current MBSFN area to the second MBSFN area, according to the indication information, including:

The first base station selects to switch the user equipment to the second MBSFN area according to the indication information.
The method according to claim 14 or 15, wherein the first base station receives the indication information sent by the second base station serving the second MBSFN area, including:

Receiving, by the first base station, a base station configuration update request message sent by the second base station, where the base station configuration update request message carries the indication information, or

The first base station receives the X2 interface modification request message sent by the second base station, where the X2 interface modification request message carries the indication information, or

The first base station receives indication information that is sent by the second base station by using the network element device.
The method according to claim 16, wherein if the network element device is a multi-cell multicast coordination entity MCE, the first base station receives, by the second base station serving the second MBSFN area, the device sent by the network element device. Instructions, including:

The first base station receives the MBMS scheduling information that is sent by the second base station by using the MCE, where the MBMS scheduling information is sent by the MCE according to the received M2 interface setup request message sent by the second base station to The indication information is carried in both the M2 interface setup request message and the MBMS scheduling information of the first base station.
The method according to claim 16, wherein if the network element device comprises a first multi-cell multicast coordination entity MCE, a second MCE, a first mobility management network element MME, and a second MME, the first And receiving, by the base station, indication information that is sent by the second base station serving the second MBSFN area by the network element device, including:

The first base station receives the MBMS scheduling information that is sent by the second base station by using the first MCE, where the MBMS scheduling information is that the first MCE is based on the received M3 interface sent by the first MME. Sending a message to the first base station, the M3 interface reset message is sent by the first MME according to the received indication information sent by the second MME For the first MCE, the indication information is sent by the second MME to the first MME according to the received M3 interface setup request message sent by the second MCE, the M3 interface setup request message. And sending, by the second MCE, the M2 interface setup request message sent by the second base station to the second MME; the M2 interface setup request message, the M3 interface setup request message, and the M3 The indication information is carried in both the interface reset message and the MBMS scheduling information.
The method according to any one of claims 14 to 18, wherein the indication information comprises service information of a service currently broadcast by the second MBSFN area, and an identifier of the second base station or the The second system frequency of the two base stations.
The method according to claim 19, wherein when the indication information is service information of a service currently broadcasted by the second MBSFN area and an identifier of the second base station, the first base station is in the user When the device leaves the first MBSFN area, the user equipment is switched to the second base station according to the indication information; or

When the indication information is the service information of the service currently broadcasted by the second MBSFN area and the second system frequency of the second MBSFN area, the first base station leaves the first MBSFN area at the user equipment And the user equipment is switched to the target base station in the second MBSFN area according to the indication information and the configuration information of the first base station.
A method for maintaining business continuity, characterized by comprising:

The second base station serving the second multicast broadcast single frequency network MBSFN area sends the indication information to the first base station serving the first MBSFN area; wherein the first base station currently broadcasts the first multimedia broadcast to the user equipment. The MBMS service is broadcasted, and the indication information is used to indicate that the service currently broadcasted by the second MBSFN area is the first MBMS service.
The method according to claim 21, wherein the second base station serving the second multicast broadcast single frequency network MBSFN area sends the indication information to the first base station serving the first MBSFN area, including:

The second base station sends a base station configuration update request message to the first base station, where the base station configuration update request message carries the indication information, or

The second base station sends an X2 interface request message to the first base station, where the X2 interface request message carries the indication information, or

The second base station sends the indication information to the first base station by using the network element device.
The method according to claim 22, wherein, if the network element device is a multi-cell multicast coordination entity MCE, the second base station sends the indication information to the first base station by using the network element device, including:

The second base station sends the MBMS scheduling information to the first base station by using the MCE, where the MBMS scheduling information is sent by the MCE according to the received M2 interface setup request message sent by the second base station. The first base station is configured to be included in the M2 interface setup request message and the MBMS scheduling information.
The method according to claim 22, wherein if the network element device comprises a first multi-cell multicast coordination entity MCE, a second MCE, a first mobility management network element MME, and a second MME, the second The sending, by the network element device, the indication information to the first base station by using the network element device, including:

The second base station sends the MBMS scheduling information to the first base station by using the first MCE, where the MBMS scheduling information is that the first MCE resets according to the received M3 interface sent by the first MME. Sending the message to the first base station, the M3 interface reset message is sent by the first MME to the first MCE according to the received indication information sent by the second MME, The information is sent by the second MME to the first MME according to the received M3 interface setup request message sent by the second MCE, where the M3 interface setup request message is the second MCE according to the received The M2 interface setup request message sent by the second base station is sent to the second MME; the M2 interface setup request message, the M3 interface setup request message, the M3 interface reset message, and the MBMS scheduling information. Both carry the indication information.
The method according to any one of claims 21 to 24, wherein the indication information comprises service information of a service currently broadcast by the second MBSFN area, and an identifier of the second base station or the The second system frequency of the two base stations.
The method according to claim 25, wherein the identifier of the second base station is configured to enable the first base station to switch the user equipment when determining that the user equipment leaves the first MBSFN area To the second base station;

The second system frequency of the second base station is configured to enable the first base station to switch the user equipment to a target in the second MBSFN area when determining that the user equipment leaves the first MBSFN area Base station.
A system for maintaining business continuity, including user equipment, characterized in that it also includes The base station according to any one of claims 1 to 7, and the base station according to any one of claims 8 to 13.