CN1968451B - A method and system for determining the time to use multicast/broadcast services - Google Patents

Abstract

The invention discloses a method for determining the time for using the multicast/broadcast service MBMS service. The steps of the method are: when a user terminal joins and leaves the MBMS service, the network controller sends the carrying The message of user terminal identification and MBMS service identification information; BM-SC respectively determines that the user terminal with the user terminal identification joins and leaves the MBMS service with the service identification according to the received message carrying the user terminal identification and MBMS service identification information time, the time difference between joining and leaving the MBMS service of the user terminal is taken as the time of using the MBMS service. The invention also discloses a system for determining the time to use the MBMS service. The system includes user terminals, network controllers and BM-SC. The invention can conveniently and quickly determine the time to use the MBMS service, and is convenient for developing the MBMS service.

Description

A method and system for determining the time to use multicast/broadcast services

technical field

The present invention relates to the field of mobile communication, in particular to a method and system for determining the time to use Multimedia Broadcast/Multicast Service (MBMS).

Background technique

Multicast/Broadcast Service (MBMS) is a service proposed by the Global Standardization Organization 3rd Generation Partnership Project (3GPP) to transmit data from one data source to multiple users. A broadcast service is a service that transmits data to all users. In broadcast mode, users can receive broadcast data without registering. The multicast service is a service that transmits data independently to users who have joined the multicast group. Typically, a multicast group is a group of users interested in a certain content. In multicast mode, only registered users can receive multicast data.

From the business characteristics of MBMS, it can be seen that MBMS can send the same data to multiple users at the same time through a shared transmission link, which can effectively save network resources, including core network and access network resources, especially the air interface. resource.

MBMS can be realized based on the packet network of Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access)/Global System for Mobile Communication (GSM, Global System for Mobile communication), by adding some new functional entities such as broadcast multicast service center ( BM-SC: Broadcast Multicast Service Centre), and for existing packet domain functional entities such as GPRS Serving GPRS Supporting Node (SGSN, Serving GPRS Supporting Node), GPRS Gateway Supporting Node (GGSN, Gateway GPRS Supporting Node), general ground wireless access The radio network controller (RNC, Radio Network Controller) in the access network (UTRAN, Universal Terrestril Radio Access Network) or the base station controller (BSC, Base Station Controller) in the GSM/EDGE radio access network (GERAN, GSM/EDGE Radio Access Network) ) and user equipment (UE, User Equipment), etc., add the function of supporting MBMS, and at the same time define a new logical shared channel to realize air interface resource sharing. The schematic diagram of the network structure of MBMS is shown in Fig. 1 .

BM-SC160 is a newly added mobile network functional entity, which is the entrance of the content provider, used to authorize and initiate MBMS bearer service in the core network, and transmit MBMS content according to the predetermined schedule. Its functions include: (1) authentication, authorization and billing of third-party content providers; (2) providing parameters related to MBMS transmission, such as QoS, multicast broadcast area; initiating and terminating MBMS transmission resources; (3) from External data sources receive and transmit MBMS content, arrange MBMS session transmission and notify users, session retransmission, etc.; (4) Service statement, including media description, session description such as multicast service identification, address, transmission time, etc.

BM-SC160 connects and communicates with GGSN150. GGSN150, as the IP multicast service node of MBMS data, establishes or releases the user plane bearer for broadcast or multicast service transmission according to the notification request of BM-SC160; receives the IP group broadcast sent by BM-SC160 In addition, it also has functions such as message notification, billing data mobile phone, and service quality (QoS) negotiation.

SGSN140 is used for network control of users, supports MBMS user movement among SGSNs, performs multicast service charging, including post-paid and pre-paid users, and establishes or releases Iu and Gn bearers according to the notification sent by GGSN150.

The UTRAN120 in the WCDMA system structure is composed of one or more radio network subsystems (RNS, Radio Network System). An RNS is composed of an RNC121 and one or more base stations 122 (Node B). GERAN130 in the system structure of GSM is made up of one or more base station subsystems (BSS, Base Station System). A BSS consists of a BSC131 and one or more base transceiver stations 132 (BTS, Base Transceiver Station).

Among them, RNC121/BSC131 transmits MBMS data in a predetermined multicast or broadcast service area; in multicast mode, select a suitable radio bearer according to the number of current service users in the cell and available radio resources, that is, select a shared channel or a dedicated channel to realize Point-to-multipoint (P-T-M, Point-to-Multipoint) or point-to-point (P-T-P, Point-to-Point) data transmission mode; support the core network to initiate and terminate MBMS transmission; support MBMS user mobility between RNCs; support Transmission of MBMS service announcements, paging information, and MBMS parallel services, such as voice calls and message services while receiving MBMS video content.

UE110 supports join/leave (join/leave) MBMS services; MBMS security-related functions, such as encryption and consistency protection for content; receive MBMS service announcements, paging information or support synchronization services; decide whether to ignore MBMS sessions according to MBMS session identifiers . UE has two basic modes of operation: idle mode and connected mode. After power-on, the UE stays in the IDLE state in the idle mode and supports the periodic location update mechanism. In the connected mode, the UE has four states in total, namely cell_forward access channel (CELL_FACH) state, cell_paging channel (CELL_PCH) state, user registration_paging channel (URA_PCH) state and cell_dedicated Channel (CELL_DCH) status. The CELL_FACH and CELL_PCH states support the periodic cell update mechanism; the URA_PCH state supports the periodic UTRAN Registration Area (URA, UTRAN Registration Area) update mechanism; the CELL_DCH state supports the air interface synchronization mechanism.

Currently, the working process of MBMS multicast includes the following eight stages:

1. Service declaration stage: provide basic information of the MBMS service to be sent to the UE.

2. Registration stage: establish the connection between UE and MBMS service provider.

3. UE joining stage: Based on the service information provided in the service declaration stage, the UE becomes a multicast group member of an MBMS service through operations in this stage. After the UE joins, the UE needs to pay for the received MBMS service, so the operation at this stage requires authentication between the UE and the MBMS service provider.

4. Session start phase: UTRAN allocates resources for MBMS services, establishes service bearers, and BM-SC prepares to send MBMS services.

5. MBMS notification stage: notify the UE to make preparations for receiving MBMS services.

6. Data transmission stage: the MBMS service is sent to the UE. In the multicast mode, the data of the MBMS service is encrypted.

7. Session end phase: MBMS service transmission ends, and resources allocated for MBMS service transmission are released.

8. UE leaving stage: the UE cancels the registration of the multicast service, and no longer receives the multicast service.

Therefore, if the core network wants to determine the time to use the MBMS service, in the standard multicast mode, it can be implemented according to the join/leave mechanism supported by the UE, that is, the time when the user terminal joins the service is recorded during the UE join phase. Similarly, In the leaving stage, the time when the user terminal leaves the service is recorded, and the time difference between joining and leaving is the time when the user uses the service.

However, in the standard multicast mode, the join/leave process supported by the UE requires multiple interactions between the UE and the core network to complete. Taking the joining process as an example, firstly, the UE sends a service request to join the session to the core network according to the service statement provided by the core network. After the core network responds, the UE becomes a member of this MBMS service and can receive data sent by multicast. The interaction process between the UE and the core network is shown in FIG. 2 .

Specifically, using the situation of UTRAN to illustrate, in the standard multicast mode, the core network needs to perform the following steps to determine the UE joining time:

Step 201: The UE exchanges PDP context activation messages with the SGSN through the UTRAN.

Step 202: UE sends a request to join Internet Group Management Protocol (IMGP) to GGSN through UTRAN and SGSN.

Step 203: GGSN sends MBMS authentication request to BM-SC.

Step 204: BM-SC sends MBMS authentication response to GGSN.

Step 205: the GGSN sends an MBMS notification request to the SGSN.

Step 206: SGSN sends a request to activate MBMS context to UE through UTRAN.

Step 207: UE sends a request message of requesting MBMS context activation to SGSN through UTRAN.

Step 208: SGSN sends MBMS notification response to GGSN.

Step 209: UE realizes security function between UTRAN and SGSN.

Step 210: SGSN sends an MBMS context creation request to GGSN.

Step 211: GGSN sends MBMS authentication request to BM-SC.

Step 212: BM-SC sends MBMS authentication response to GGSN.

Step 213: the GGSN sends a registration request to the BM-SC.

The BM-SC regards the time when the MBMS registration request is received as the time when the UE joins the MBMS service.

Step 214: BM-SC sends MBMS registration response to GGSN.

Step 215: GGSN sends MBMS context creation response to SGSN.

Step 216: SGSN sends MBMS registration request to GGSN.

Step 217: GGSN sends MBMS registration response to SGSN.

Step 218: The SGSN sends an acceptance MBMS context activation to the UE.

Similarly, when the user terminal leaves, the UE also needs to initiate a leave session request to the network to end the MBMS service. Therefore, it is also necessary to complete the leave process through multiple interactions between the UE and the core network, and the BM-SC will receive the MBMS deregistration request. The requested time point is taken as the time when the UE leaves the MBMS service, and the time to use the MBMS service can be determined according to the time difference between the UE's joining and leaving time. It can be seen that when the MBMS standard multicast method is adopted, the time for the UE to wait for the response from the core network is prolonged, thus bringing a relatively large access/channel switching delay for the UE.

Another scheme for implementing MBMS is the MBMS enhanced broadcast scheme. The basic idea is to introduce the UE counting (COUNTING) mechanism on the basis of the MBMS broadcast scheme to realize flexible selection of the MBMS wireless bearer mode according to the number of users. When there are too few data users, a point-to-point (P-T-P, Point-to-Point) wireless bearer mode can be selected to send data, saving system power resources.

In this enhanced broadcast solution, the performance of the RNC on the radio side is greatly improved, and at the same time, because there is no interaction with the core network, the UE access/channel switching delay is greatly reduced. However, in this enhanced broadcast solution, the process of user terminal joining/leaving is the same as that of broadcasting, there is no need for registration, joining and leaving stages, and the user terminal can simply switch to the relevant channel to receive The broadcast data, therefore, does not need to inform the core network of the joining/leaving of user terminals. The core network cannot determine the usage time of the MBMS service, cannot implement billing according to the duration, and cannot accurately grasp the operation status of the service, the duration of the user's on-demand program, and the peak time of the service. Advertisers also cannot obtain accurate audience rating data, and the above defects are quite unfavorable to business development.

To sum up, the current technology cannot conveniently and quickly determine the time to use the MBMS service, which is not conducive to the development of the MBMS service.

Contents of the invention

In view of this, the embodiment of the present invention provides a method for determining the time for using the MBMS service, which can conveniently and quickly determine the time for using the MBMS service.

The embodiment of the present invention provides a system for determining the time for using the MBMS service, which can conveniently and quickly determine the time for using the MBMS service.

In order to achieve the above-mentioned first object, the technical solution proposed by the present invention is: a method for determining the time of using multicast/broadcast service MBMS, the method comprising:

When the user terminal joins and leaves the MBMS service, the network controller sends the message carrying the user terminal identification and MBMS service identification information sent by the user terminal to the broadcast multicast service center BM-SC;

BM-SC respectively determines the time when the user terminal with the user terminal ID joins and leaves the MBMS service with the service ID according to the received message carrying the information of the user terminal ID and the MBMS service ID, and joins and leaves the user terminal with the MBMS service The time difference of the MBMS service is used as the time of using the MBMS service.

In order to achieve the above-mentioned second purpose, the technical solution proposed by the present invention is: a system for determining the time to use multicast/broadcast service MBMS service, the system includes: user terminal, network controller and broadcast multicast service center BM- SC;

The user terminal is used for sending a message carrying user terminal identification and MBMS service identification information to the broadcast multicast service center BM-SC through the network controller when the user terminal joins and leaves the MBMS service;

The network controller is configured to forward the message carrying the user terminal identifier and MBMS service identifier information sent by the user terminal to the BM-SC;

The BM-SC is configured to respectively determine the time when the user terminal with the user terminal ID joins and leaves the MBMS service with the service ID according to the received message carrying the user terminal ID and the MBMS service ID information, and The time difference between the user terminal joining and leaving is taken as the time of using the MBMS service.

It can be seen from the technical solutions of the embodiments of the present invention that the network controller forwards to the BM-SC the message carrying the user terminal identification and the MBMS service identification information sent by the user terminal, and the BM-SC determines respectively that the user terminal with the user terminal identification joins and The time of leaving the MBMS service with the service identifier and the time of using the MBMS service can conveniently and quickly determine the time of using the MBMS service.

Description of drawings

FIG. 1 is a schematic diagram of a network structure of an MBMS in the prior art;

FIG. 2 is a schematic diagram of a process in which a UE joins or leaves an MBMS service multicast group in the prior art;

FIG. 3 is a flow chart of the process of establishing a P-T-P bearer while the user terminal joins the MBMS service in the first embodiment of the present invention;

Fig. 4 is the flow chart of the process of user terminal joining MBMS service in the second embodiment of the present invention;

Fig. 5 is the flow chart of the process that the user terminal joins the MBMS service and triggers the conversion to P-T-M according to the third embodiment of the present invention;

FIG. 6 is a flow chart of the process of UE normally leaving the MBMS service in the idle state according to the fourth embodiment of the present invention;

FIG. 7 is a flowchart of a UE keep-alive process in an idle state according to a fifth embodiment of the present invention;

FIG. 8 is a flow chart of the keep-alive process of the UE in the CELL_DCH state according to the sixth embodiment of the present invention;

Fig. 9 is a schematic diagram of the system of the seventh embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

The technical solution of the embodiment of the present invention is: when the user terminal joins and leaves the MBMS service, the network controller sends messages carrying the user terminal identification and MBMS service identification information to the BM-SC respectively, and the BM-SC carries the user terminal identification information according to the received information. identification and MBMS service identification information, respectively determine the time when the user terminal with the user terminal identification joins and leaves the MBMS service with the service identification, and the time difference between the user terminal joining and leaving the MBMS service is used as the time for using the MBMS service. The embodiment of the invention also includes a keep-alive process for judging whether the user terminal can leave normally.

In this embodiment of the present invention, the network controller is an RNC and the user terminal is a UE. In the following, the method for determining the joining time will be specifically described by taking the case where UE joins the MBMS service under different MBMS service states in the existing enhanced broadcast mode as an example.

Embodiment one

Fig. 3 is a flow chart of determining the joining time when the user terminal joins the MBMS service and establishes a P-T-P bearer in the first embodiment of the present invention. Include the following steps:

Step 301: UE joins MBMS service.

Step 302: The UE sends an RRC connection request to the RNC, and the message includes the information that the user terminal joins the MBMS service.

In this embodiment, the wireless connection is not established, therefore, the UE sends an RRC connection request to the RNC, and the initial UE identity (Initial UE Identity) information element in the RRC connection request message contains the user terminal identity information, and the MBMS Selected Services (MBMS Selected Services ) information element contains MBMS service identification information, and user terminal action identification information is included in the MBMS UE action information element in the RRC connection request message. Among them, the MBMS UE Action (MBMS UE Action) cell list is defined as shown in Table 1:

cell name Is it necessary Type and reference value Cell Description MBMS UE action yes {00, 01, 10, 11} 00 means leave 01 means join 10 means no action 11 keep

Assuming that in this embodiment, the UE joins the weather forecast service for a fixed time period in the selected MBMS service, the initial UE identification information element contains the UE identification, and the MBMS selection service information element contains the service identification of the service. At the same time, in The location corresponding to the MBMS UE action information element, and its information element value is 01, indicating that the UE joins the MBMS service.

Step 303: RNC extracts user terminal identifier and MBMS service identifier information from the received message.

In this embodiment, the RNC can obtain the MBMS service identification information selected by the user and the UE action identification information from the received RRC connection request.

Step 304: the RNC sends an RRC connection establishment message to the UE.

Step 305: The UE responds to the RNC with an RRC connection establishment complete message.

After the UE responds to the RNC with the RRC connection establishment complete message, it indicates that the MBMS service information exchange process between the UE and the RNC is over. Next, the RNC will interact with the core network to report MBMS service information.

Step 306: RNC sends UE join MBMS service message to BM-SC.

In this embodiment, the BM-SC determines that the user with the UE ID chooses to join the MBMS service for a fixed period of time in the weather forecast service according to the received UE ID, MBMS service ID, and UE action ID, and sends the received message The time is used as the time when the UE joins the MBMS service.

Step 307: the RNC sends a radio bearer establishment message to the UE.

In this embodiment, when the user terminal joins the MBMS service, a P-T-P bearer needs to be established, so the RNC notifies the UE to establish a radio bearer.

Step 308: The BM-SC sends a UE join MBMS service message response to the RNC.

Embodiment two

Fig. 4 is another flow chart of a user terminal joining an MBMS service according to the second embodiment of the present invention, and the service has not started yet. At this time, after the RRC connection is established, the RNC will release the RRC connection in order to reduce the delay.

Step 401: UE joins MBMS service.

Step 402: UE sends RRC connection request to RNC.

The UE sends an RRC connection request to the RNC. The initial UE identification information element in the RRC connection request message contains user identification information. When the UE joins the MBMS service, the MBMS selection service information element contains the MBMS service identification information.

Step 403-step 405 are the same as step 303-step 305, and will not be repeated here.

Step 406: RNC sends a message including UE ID and MBMS service ID information to BM-SC.

The BM-SC stores the UE identity list for selecting MBMS services and its MBMS service identity information. After receiving the message of the UE identity and MBMS service identity information, the BM-SC first compares whether the received UE identity is included in the stored UE identity list, and if not Include, all the services with the MBMS service ID will be regarded as the MBMS services joined by the UE, and when receiving this message as the time to join these services, the BM-SC will add the UE ID and the selected MBMS service ID information to the UE ID list and MBMS service ID status information list;

If the UE ID is included, then by comparing the received service ID information with the stored service ID information, it can be known whether the UE has joined the MBMS service. The time point to this message is taken as the joining time. When the service identifier changes from yes to no, the service is left, and the time point of receiving this message is taken as the time of departure. If the service ID does not change, it means no action. In the embodiment of the present invention, if the MBMS selection service information element contains the MBMS service identification information, and the stored user service identification information is none, it means that the UE joins the MBMS service.

Step 407: RNC sends an RRC connection release message to UE.

In this embodiment, since the service has not started yet, there is no need to establish a radio bearer, so the RNC sends an RRC connection release message to the UE.

Step 408: BM-SC sends UE join MBMS service message response to RNC.

If the user is using the bearer in P-T-M mode when joining, there is no need to establish a radio bearer, therefore, the steps to be executed are similar to those in the above-mentioned embodiment.

Embodiment Three

FIG. 5 is a flow chart of a process in which a user terminal joins an MBMS service and triggers conversion to P-T-M according to the third embodiment of the present invention.

Step 501-step 503 are the same as step 401-step 403, and will not be repeated here.

Step 504: The RNC switches to the P-T-M radio bearer mode.

In this embodiment, the RNC decides to switch from P-T-P to P-T-M radio bearer mode after selecting the radio bearer mode according to the number of currently serving users in the cell and the available radio resources.

Step 505-step 507 are the same as step 304-step 306.

Step 508: RNC sends an RRC connection release message to UE.

In the embodiment of the present invention, since the P-T-M radio bearer mode does not need to establish a radio bearer, the RNC sends an RRC connection release message to the UE.

Step 509: The BM-SC sends a UE join MBMS service message response to the RNC.

By analyzing the steps of Embodiments 1, 2 and 3 of the present invention, it can be seen that when the UE joins the MBMS service, the RNC sends a message including the user terminal identifier and the MBMS service identifier information to the BM-SC. Therefore, the core network can determine the The time when the UE joins the MBMS service.

Compared with the standard multicast service, it avoids multiple interaction processes between the UE and the core network, solves the delay problem caused by UE access/channel switching, and introduces a small system delay, so it can be convenient Quickly determine the time when the UE joins the MBMS service. The following is a specific embodiment of determining the departure time of the UE.

Fig. 6 is a flow chart of the process of the UE normally leaving the MBMS service in the idle state according to the fourth embodiment of the present invention.

Step 601: UE leaves MBMS service.

Step 602: The UE sends an RRC connection request to the RNC, and the message includes the information that the user terminal leaves the MBMS service.

This embodiment is implemented by modifying the information elements in the RRC connection request, that is, the initial UE identification information element in the RRC connection request message contains UE identification information, the MBMS selection service information element contains MBMS service identification information, and the UE action identification The information is included in the MBMS UE Action IE in the RRC Connection Request message, and its value is set to 00.

Step 603: RNC extracts user terminal identifier and MBMS service identifier information from the received message.

Step 604: the RNC sends an RRC connection establishment message to the UE.

Step 605: The UE responds to the RNC with an RRC connection establishment complete message.

Step 606: RNC sends UE leaving MBMS service message to BM-SC.

In this embodiment, the BM-SC determines that the user with the UE identity leaves the MBMS service with the MBMS service identity according to the received UE identity, MBMS service identity and UE action identity, and the BM-SC takes the time of receiving this message as The time when the UE leaves the MBMS service.

Step 607: RNC sends an RRC connection release message to UE.

Step 608: BM-SC sends UE leaving MBMS service message response to RNC.

In this embodiment, the BM-SC can determine the leaving action of the UE according to the UE leaving the MBMS service message, so as to obtain the time when the UE leaves the MBMS service. The BM-SC can also compare the received service identification information with the stored service identification information according to the stored MBMS service identification information. When the service identification changes from yes to no, it means that the UE leaves the MBMS service and will receive this message point as the departure time. The time to use the MBMS service is determined according to the time difference between joining and leaving the MBMS service.

From the above embodiments of the invention, it can be seen that since the time for using the MBMS service can be determined, the embodiments of the present invention can realize the functions of billing the MBMS service according to the duration and counting the operation status, so that the MBMS service can be better developed.

When abnormal conditions such as power failure and out-of-service area occur in the UE, the normal MBMS service leaving process cannot be carried out at this time. In view of this situation, the system needs to add a keep-alive process to judge whether the UE can leave normally. The following describes how to determine whether the UE can leave normally by taking the UE in different states to implement the keep-alive process.

For the UE in the IDLE state, using its periodic location update mechanism, when the service starts, the RRC connection establishment request message that the UE initiates a periodic location update will contain the UE's MBMS service information. If the BM-SC can receive the periodic keep-alive message, it considers that the current UE is working normally and can leave normally. When the BM-SC has not received the keep-alive message after one location update period, it considers The UE is working abnormally and cannot leave normally. FIG. 7 is a flowchart of a UE keeping alive process in IDLE state according to the fifth embodiment of the present invention.

Step 701: UE in idle state decides to initiate periodic location update.

Step 702: The UE sends an RRC connection establishment request for periodic location registration to the RNC, and the message carries MBMS service identification information.

In this embodiment, the RNC can periodically receive the RRC connection establishment request for periodic location registration sent by the UE, and the RNC determines that the UE is running normally.

Step 703: RNC sends UE MBMS service keep-alive message to BM-SC.

In the embodiment of the present invention, the BM-SC determines that the user can leave normally according to the periodic keep-alive message sent by the RNC.

In the CELL_DCH state, the synchronization mechanism of its air interface is used to carry out the keep-alive process.

FIG. 8 is a flowchart of a UE keep-alive process in a CELL_DCH state according to the sixth embodiment of the present invention. For the user in the CELL_DCH state, use the synchronization mechanism of its air interface, when the synchronization of the air interface is normal, the user is considered normal.

Step 801: UE is in CELL_DCH state.

Step 802: Air interface synchronization process between UE and access network.

Step 803: The RNC judges whether the user is abnormal through the air interface connection, and initiates a keep-alive process.

In this embodiment, the RNC initiates the keep-alive process, that is, judges whether the UE can run normally by judging whether the air interface is synchronized. Assuming that in this embodiment, it is determined that the UE is working abnormally, no keep-alive message is sent.

The BM-SC judges that the keep-alive message sent by the RNC has timed out, determines that the user cannot leave normally, and performs abnormal processing, for example, the BM-SC determines the time point when the UE cannot normally leave the MBMS service or the time point before the BM-SC receives the message. The time point of the second keep-alive message is used as the leaving time, or the time of joining and leaving the MBMS service of the user terminal is not recorded, or other processing methods selected by the operator.

For UEs in CELL_FACH, CELL_PCH, and URA_PCH states, use their periodic cell and periodic URA update mechanisms. When the periodic update of the user is normal, the UE is considered normal. I won't go into details here.

In this embodiment, on the basis of determining the time for using the MBMS service, a keep-alive mechanism for abnormal users is further proposed, which is beneficial to enhancing the robustness and stability of the system.

FIG. 9 is a schematic diagram of a system according to a seventh embodiment of the present invention, including UE910, RNC920 and BM-SC930.

When the user terminal joins and leaves the MBMS service, UE910 sends messages carrying UE ID and MBMS service ID information to BM-SC930 through RNC920 respectively;

Next, the RNC920 forwards the message carrying the UE ID and the MBMS service ID information sent by the UE910 to the BM-SC930;

BM-SC930 determines the time when UE910 with the UE ID joins and leaves the MBMS service with the service ID according to the received message carrying the UE ID and MBMS service ID information, and takes the time difference between UE910 joining and leaving as the time for using the MBMS service time.

Wherein, the BM-SC930 may include a storage unit 933, an action judgment unit 931 and a time determination unit 932;

The storage unit 933 in the BM-SC930 stores a list of UE identities that select MBMS services and the information of the MBMS service identities selected by the UE;

After the BM-SC receives the message of the UE ID and the MBMS service ID information, the action judging unit 931 in the BM-SC930 reads the UE ID and the MBMS service ID information in the storage unit 933, and compares whether the stored UE ID list contains If the received UE ID does not contain it, use all the services with the MBMS service ID as the MBMS services that the UE joins, obtain the result that the UE with the UE ID joins all the MBMS services with the service ID, and use the obtained result Input to the time determination unit 932, the time point of the received message carrying the UE identification and MBMS service identification information is used by the time determination unit 932 in the BM-SC930 as the time when the user joins the MBMS service;

If it contains the UE ID, then by comparing the received service ID information with the stored service ID information, it can be known whether the UE has joined the MBMS service. The result that the UE with the UE ID joins the MBMS service with the service ID, and the obtained result is input to the time determination unit 932; when the service ID changes from having to not, then it is to leave the service, and the UE with the UE ID is obtained to leave the service with the UE ID The result of the MBMS service identified by the service, and the obtained result is input to the time determination unit 932; if the service identifier remains unchanged, no action is taken, and no judgment result is output.

The time determining unit 932 in the BM-SC 930, according to the result input by the action judging unit 931, takes the time point of the received message carrying the UE ID and MBMS service ID information as the time when the UE joins and leaves the MBMS service, and The time difference between UE joining and leaving the MBMS service is used as the time of using the MBMS service.

The BM-SC may also only include an action determination unit and a time determination unit; at this time, the message carrying UE identification and MBMS service identification information also includes UE action identification information; in this embodiment, the action determination unit in BM-SC930 According to the received carrying UE identification, MBMS service identification information and UE identification information, respectively determine that the UE with the UE identification joins and leaves the MBMS service with the MBMS service identification, and inputs the obtained results into the time determination unit; time determination The units are the same as those in the above-mentioned embodiments, and will not be repeated here.

From the analysis of the above embodiments, it can be seen that, compared to the enhanced broadcast solution, the embodiment of the present invention can forward the message carrying the user terminal identifier and MBMS service identifier information sent by the user terminal to the BM-SC through the network controller, Notify the core network of the joining/leaving of the user terminal, so the core network can determine the usage time of the MBMS service.

Compared with the standard multicast mode, the embodiment of the present invention can avoid the problem that the user terminal waits for the response of the core network during the interaction process with the core network, thereby greatly reducing the user terminal access/channel switching delay, which can facilitate Quickly determine the service time of using MBMS.

The above are only preferred embodiments of the embodiments of the present invention, and are not intended to limit the protection scope of the embodiments of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the embodiments of the present invention shall be included in the protection scope of the embodiments of the present invention.

Claims (11)

1. determine to use the professional MBMS time method of multicast/broadcast for one kind, it is characterized in that this method comprises:

User terminal adds and leaves MBMS when professional, sends the message of carrying user terminal identification and MBMS service identification information that user terminal is sent by network controller to broadcast multicast service center BM-SC;

BM-SC is according to the message of carrying user terminal identification and MBMS service identification information that receives, the time of determining to have the user terminal adding of this user terminal identification respectively and leaving MBMS business, this user terminal is added and the time of the time difference of leaving this MBMS business as this MBMS business of use with this service identification.

2. method according to claim 1, it is characterized in that, described network controller further comprised before the message of user terminal identification and MBMS service identification information is carried in the BM-SC transmission: user terminal sends to network controller and carries the wireless connections request message of user terminal identification and MBMS service identification information.

3. method according to claim 1 and 2 is characterized in that, described BM-SC determines to have the user terminal adding of this user terminal identification respectively and leaves the method for the MBMS business hours with this service identification is:

The tabulation of the user terminal identification of BM-SC storage selection MBMS business and the MBMS service identification information of user terminal selecting are judged the user terminal identification that whether comprises reception in the user terminals stored identification list,

If do not comprise, BM-SC will receive the time point of the message of carrying user terminal identification and MBMS service identification information, add the time that all have the MBMS business of service identification as the user terminal with this user terminal identification;

If comprise, whether the service identification information of judging this user terminal that receives again is identical with the service identification information of storage, if, this user terminal does not add and leaves the MBMS business with this service identification, otherwise, determine the user terminal adding respectively and leave the MBMS business, BM-SC will receive the time point of the message of carrying user terminal identification and MBMS service identification information, add and leave the time of the MBMS business with this service identification as the user terminal with this user terminal identification.

4. method according to claim 1 and 2 is characterized in that, also comprises the user terminal action identification information in the described message of carrying user terminal identification and MBMS service identification information;

Described BM-SC determines that respectively user terminal adds and the time method of leaving the MBMS business with this service identification is:

BM-SC is according to adding and leave message in user terminal identification, MBMS service identification and the user terminal action identification information, determine respectively to have the user terminal adding of this user terminal identification and leave MBMS business with this service identification, BM-SC is received the time point of the message of carrying user terminal identification, MBMS service identification and user terminal action identification information, add and leave the time of MBMS business as user terminal with this service identification with this user terminal identification.

5. method according to claim 4, it is characterized in that, network controller is a radio network controller (RNC), when user terminal is user equipment (UE), described network controller is before the message of user terminal identification and MBMS service identification information is carried in the BM-SC transmission, further comprise: user terminal sends the radio resource control RRC connection request message of carrying user terminal identification and MBMS service identification information to network controller

The MBMS that the information of described MBMS service identification is included in the RRC connection request message selects in the professional cell;

Described user terminal action identification information is included in the MBMS UE action cell in the RRC connection request message.

6. method according to claim 1 is characterized in that, before the user terminal of determining to have this user terminal identification left the time of the MBMS business with this service identification, this method further comprised the process of judging that can user terminal normally leave:

Can whether network controller periodically update normal according to user terminal or be air interface synchronous, judge whether user terminal moves normally, if then network controller periodically sends keep-alive message to BM-SC, otherwise network controller does not send the user terminal keep-alive message to BM-SC;

BM-SC judges whether the keep-alive message that network controller sends is overtime; if; BM-SC determines that the user terminal with this user terminal identification can not normally leave the MBMS business; carry out abnormality processing; otherwise BM-SC determines the user terminal with this user terminal identification and can normally leave the MBMS business, carries out the step that the user terminal of determining to have this user terminal identification leaves the time of the MBMS business with this service identification.

7. method according to claim 6; it is characterized in that; described abnormality processing for the time point BM-SC being determined user terminal and can not normally leave the time point of MBMS business or BM-SC is received keep-alive message last time as time departure, perhaps do not write down the adding of this user terminal and leave time of MBMS business.

8. determine to use the multicast/broadcast system of professional MBMS business hours for one kind, it is characterized in that this system comprises: user terminal, network controller and broadcast multicast service center BM-SC;

Described user terminal when being used for adding and leaving the MBMS business, sends by network controller the message of carrying user terminal identification and MBMS service identification information to broadcast multicast service center BM-SC;

Described network controller, the forwards of carrying user terminal identification and MBMS service identification information that is used for user terminal is sent is given BM-SC;

Described BM-SC, be used for according to the message of carrying user terminal identification and MBMS service identification information that receives, the time of determining to have the user terminal adding of this user terminal identification respectively and leaving MBMS business with this service identification, and with this user terminal adding and the time of the time difference of leaving this MBMS business as this MBMS business of use.

9. system according to claim 8 is characterized in that, described network controller is radio network controller (RNC) or base station controller BSC.

10. system according to claim 8 is characterized in that, described BM-SC comprises action determining unit and time determining unit;

Described action determining unit, be used for adding and leave message according to the user terminal identification, MBMS service identification and the user terminal action identification information that receive, determine respectively to have the user terminal adding of this user terminal identification and leave MBMS business, the definite result who obtains is input to the time determining unit with this MBMS service identification;

Described time determining unit, be used for definite result according to the input of action determining unit, the time point of the message of carrying user terminal identification, MBMS service identification and user terminal action sign that receives as the time that this user adds and leave this MBMS business, is added this user terminal and the time of the time difference of leaving this MBMS business as this MBMS business of use.

11. system according to claim 8 is characterized in that, described BM-SC comprises memory cell, action judging unit and time determining unit;

Described memory cell is used to store the tabulation of the user terminal identification of selecting the MBMS business and the MBMS service identification information of user terminal selecting;

Described action judging unit, be used for according to the tabulation of the user terminal identification of the memory cell of carrying user terminal identification and MBMS service identification information and reading that receives and the MBMS service identification information of user terminal selecting, judge the user terminal identification that whether comprises reception in the user terminals stored identification list, if do not comprise, the user terminal that obtains having this user terminal identification adds the result that all have the MBMS business of service identification, and the result who obtains is input to the time determining unit; If comprise, whether the service identification information of judging this user terminal that receives again is identical with the service identification information of storage, if, do not export judged result, otherwise, determine respectively to have the user terminal adding of this user terminal identification and leave MBMS business, the result who obtains is input to the time determining unit with this MBMS service identification;

Described time determining unit, be used for result according to the input of action judging unit, the time point of the message of carrying user terminal identification and MBMS service identification information that receives as the time that this user adds and leave this MBMS business, is added this user terminal and the time of the time difference of leaving this MBMS business as this MBMS business of use.

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