CN100546251C - Method and system for developing MBMS service in network - Google Patents

Abstract

The invention relates to a method and system for developing MBMS service in a network. The present invention mainly includes: the RNC (Radio Network Controller) under the MBMS (Broadcast Multicast Service) service area performs information interaction with the serving RNC of the user equipment, and the serving RNC receives the MBMS message sent by the RNC under the MBMS service area. service; and the serving RNC sends the received MBMS service to the user equipment. Therefore, the present invention exchanges information between the SRNC outside the MBMS service area and the DRNC inside the MBMS service area, so that the SRNC outside the MBMS service area can correctly process the service request message of the UE, thereby providing UE with service authority Normal MBMS business.

Description

Method and system for developing MBMS service in network

technical field

The invention relates to the technical field of network communication, in particular to a method and system for developing MBMS services in a network.

Background technique

In third generation telecommunication systems, higher bit rates and better possibilities for sending variable bit rate traffic are provided, which opens the way for new types of services. Multimedia Broadcast Multicast Service (MBMS, Multimedia Broadcast Multicast Service), the symbol service of the third generation mobile communication partnership project (3GPP), is the representative of these new services.

As a supplement to the unicast solution of the mobile network, MBMS is transmitted through a point-to-multipoint connection, so that network resources and capacity can be used more effectively, so that an unlimited number of users can simultaneously watch the same mobile broadcast in the same area. multimedia business.

In MBMS, the broadcasting service is mainly applied to services that deliver content to all users, such as radio broadcasting and television services, and these services are transmitted through the air, artificial satellite or cable network.

In the MBMS network architecture shown in Figure 1, the corresponding broadcast service flow is shown in Figure 2, specifically including:

Step 11: The network side sends a service announcement (service announcement) message, which is used to notify the user of the MBMS service content provided by the current network, and the relevant information of each MBMS service, such as the service identifier, the description of the service content, and the IP multicast address of the bearer service , start playing time, etc.

Step 12: The broadcast multicast service center (BM-SC) sends a session start (Session start) message to notify the gateway GPRS support node (GGSN), serving GPRS support node (SGSN) and 3G wireless access network (UTRAN) MBMS The service is about to start playing, and each network entity needs to establish a point-to-multipoint transmission bearer from the BM-SC to each serving cell.

Step 13: The BM-SC sends an MBMS notification (MBMS notification) message to notify each user equipment (UE) in the service area that the MBMS service is about to start playing, so that each user equipment is ready to receive.

Step 14: Execute a data transfer (Data transfer) process, which is used to transmit actual service data from the content provider to each UE.

Step 15: BM-SC sends a session stop (Session stop) message to notify GGSN, SGSN and UTRAN that the MBMS service stops playing, and each network entity needs to remove the point-to-multipoint transmission bearer from BM-SC to each serving cell .

In the process shown in FIG. 2, the MBMS service request processing flow is also included between the network side providing the UE with the MBMS multicast service request, as shown in FIG. 3, specifically including:

Step 31: When the UE is in the radio resource idle (RRC-Idle) state, the UE that needs to carry out the broadcast service needs to send an RRC connection request message to the RNC, and the RNC returns the RRC connection to the UE after receiving the request message and establishing the RRC connection build message;

Step 32: UE sends a service request message to SGSN;

Step 33: SGSN executes the security command process and starts the data encryption function;

Step 34: The UE sends an MBMS service request message to the RNC, and the message carries the MBMS service key obtained by the UE;

Specifically: the UE provides the service identifier, service key identifier and specific service key of each MBMS service that the UE wishes to receive to the RNC through an MBMS service request message (MBMS Service Request);

For the same MBMS service, the RNC will compare the MBMS service key from the BM-SC with the MBMS service key from the UE; if the comparison results are consistent, then the UE is considered to have the right to receive the MBMS service, and perform the steps 35; otherwise, it is considered that the UE does not have the authority, and an MBMS Service Reject message (MBMS Service Reject) is sent.

Step 35: The RNC notifies the UE to initiate the MBMS radio resource establishment process, that is, to establish the point-to-point (PTP) or point-to-multipoint (PTM) air interface data transmission bearer required by the UE to receive the broadcast service.

In the above process, if the RNC to which the UE belongs, that is, the UE serving RNC (SRNC), is outside the MBMS service area, the UE cannot obtain the MBMS service provided by the MBMS service area because the SRNC cannot obtain the MBMS services provided by the MBMS service area. MBMS business.

Contents of the invention

The purpose of the present invention is to provide a method and system for developing MBMS service in the network, so that RNC outside the MBMS service area can still provide MBMS service to UE.

The purpose of the present invention is achieved through the following technical solutions:

The present invention provides a method for developing MBMS services in a network, including providing MBMS services for user equipment through a radio network controller RNC under a broadcast multicast MBMS service area, including:

The RNC under the MBMS service area exchanges information with the serving RNC of the user equipment, and the serving RNC receives the MBMS service sent by the RNC under the MBMS service area;

The serving RNC sends the received MBMS service to the user equipment;

Wherein, the process of information exchange includes: after the serving RNC receives the MBMS service request sent by the user equipment, it sends the key information sent by the user equipment to the RNC under the MBMS service area; The RNC verifies the user equipment according to the key information, and returns the verification result to the serving RNC;

In addition, the serving RNC is an RNC outside the MBMS service area, and the user equipment is under the RNC under the MBMS service area.

The method also includes:

After the serving RNC receives the MBMS service request message sent by the user equipment, it triggers the process of information exchange between the RNC under the MBMS service area and the serving RNC of the user equipment.

Specifically, the RNC under the MBMS service area may verify the key information provided by the user equipment according to the service key obtained from the broadcast multicast service center through the MBMS service session start process.

The method also includes:

When the serving RNC confirms that the user equipment has not passed the authentication according to the verification result sent by the RNC under the MBMS service area, it sends an MBMS service rejection message to the user equipment.

In the present invention, the processing procedure that realizes that described serving RNC receives the MBMS service that the RNC under the MBMS service area sends specifically includes:

If the serving RNC determines that the user equipment has passed the verification according to the verification result sent by the RNC under the MBMS service area, and the serving RNC has not obtained the corresponding MBMS service from the RNC under the MBMS service area, then the serving RNC will go to the MBMS service area The RNC sends a session start request message, which includes the MBMS service identifier and the tunnel endpoint identifier TEID that need to obtain the service key information;

The RNC under the MBMS service area returns a session start response message to the serving RNC, and uses the TEID to send the MBMS service to the serving RNC;

The serving RNC receives the MBMS service sent by the RNC under the MBMS service area.

The method of the present invention also includes:

After the serving RNC receives the verification result sent by the RNC under the MBMS service area and determines that the user equipment has passed the verification, if the serving RNC has obtained the corresponding MBMS service from the RNC under the MBMS service area, it will directly provide the user equipment with the MBMS business.

The method of the present invention also includes:

When the serving RNC no longer needs to forward the MBMS data to the user equipment, the serving RNC sends an MBMS session stop request to the RNC under the MBMS service area;

After the RNC in the MBMS service area receives the MBMS session stop request, it stops forwarding the corresponding MBMS service data to the serving RNC, and triggers the removal of the data bearer between the serving RNC and the RNC in the MBMS service area.

The method of the present invention also includes:

When the RNC under the MBMS service area determines to no longer send MBMS data to the serving RNC, it sends an MBMS session stop request to the serving RNC;

After receiving the MBMS session stop request, the serving RNC removes the data bearer between the serving RNC and the RNC under the MBMS service area.

The method of the present invention also includes:

When the RNC under the MBMS service area receives the session stop request from the SGSN, it determines that it no longer needs to send MBMS data to the serving RNC.

The present invention also provides a system for developing MBMS services in the network, including:

An information interaction processing device, used for information exchange between the RNC under the MBMS service area and the serving RNC;

The MBMS service sending unit is arranged in the RNC under the MBMS service area, and is used to send the MBMS service to the serving RNC;

The MBMS service reception processing unit is arranged in the serving RNC, and is used for sending the received MBMS service to the user equipment after receiving the MBMS service sent by the RNC under the MBMS service area;

Wherein, the information interaction processing device specifically includes:

The user equipment key sending unit is arranged in the serving RNC and is used to send the key information provided by the user equipment to the RNC under the MBMS service area;

The verification processing unit is arranged in the RNC under the MBMS service area, and is used to verify the user equipment according to the key information of the user equipment, and obtain a verification result;

The verification result sending unit is arranged in the RNC under the MBMS service area, and is used to send the verification result obtained by the verification processing unit to the serving RNC;

The verification result receiving unit is set in the serving RNC, and is used to receive the verification result information for the user equipment sent by the verification result sending unit, and trigger the MBMS service sending unit according to the verification result;

In addition, the serving RNC is an RNC outside the MBMS service area, and the user equipment is under the RNC under the MBMS service area.

The information interaction processing device also includes:

The session start request initiation unit is arranged in the serving RNC, and is used to send a session start request message to the RNC under the MBMS service area after the user equipment is authenticated;

The session start processing unit is set in the RNC under the MBMS service area, and is used to trigger the MBMS service sending unit according to the received session start request.

The system of the present invention also includes:

The session stop processing unit is set in the serving RNC or the RNC under the MBMS service area, and is used for initiating the MBMS service stop processing process, and triggering the removal of the corresponding data bearer between the serving RNC and the RNC under the MBMS service area.

The system of the present invention also includes:

The service trigger processing unit is set in the serving RNC, and is used to trigger the information interaction processing device after receiving the MBMS service request message sent by the user equipment.

As can be seen from the technical solution provided by the present invention above, the present invention performs information interaction with the RNC (ie DRNC) in the MBMS service area through the SRNC outside the MBMS service area, such as the attachment process initiated by the SRNC to the DRNC and the session start process procedures, etc., so that the SRNC outside the MBMS service area can correctly process the UE's service request message, so as to provide normal MBMS services for UEs with service rights.

Moreover, the implementation solution provided by the present invention does not involve entities in the core network during the entire implementation process, that is, does not require the participation of entities in the core network, thus making the entire implementation process relatively simple.

Description of drawings

FIG. 1 is a schematic diagram of an MBMS service bearer architecture;

FIG. 2 is a schematic diagram of an MBMS service processing flow;

FIG. 3 is a schematic diagram of an MBMS service request processing flow in the prior art;

FIG. 4 is a schematic diagram of a specific implementation process flow of the method of the present invention;

Fig. 5 is the second schematic diagram of the specific implementation process of the method of the present invention;

FIG. 6 is a schematic diagram of a specific implementation processing flow of the session stop process in the present invention;

FIG. 7 is a second schematic diagram of a specific implementation processing flow of the session stop process in the present invention;

FIG. 8 is a schematic structural diagram of a specific implementation of the system of the present invention.

Detailed ways

The main purpose of the present invention is to solve the problem that the SRNC cannot handle the corresponding service request when the SRNC (serving RNC) is outside the MBMS service area and the UE initiates a service request under the DRNC (drift RNC) during the MBMS service development process.

The concrete implementation scheme that the present invention can adopt comprises:

First, when the UE initiates the MBMS Service Request process, the SRNC will forward the UE context to the DRNC through the Attach process;

After that, DRNC will verify the key reported by UE after receiving the UE context sent by SRNC. When it is determined that the key reported by UE is incorrect, DRNC needs to notify SRNC, and SRNC will reject the service request of UE;

Specifically, the DRNC verifies the key reported by the UE through the MBMS service key obtained from the BM-SC, so as to determine whether the key reported by the UE is correct.

For this reason, the present invention needs to increase new information element " Not ProvidedUE " in IE " MBMS ChannelType Information (MBMS channel type information) " in Iur mouth (being the interface between RNC) message " DIRECTINFORMATION TRANSFER (transmission indication information) " List (list of UEs that do not provide services)", the list of UEs that have not passed the verification at the DRNC place is passed to the SRNC through this new information element, as shown in Table 1:

Table 1

IE/Group Name Presence Range IE Type and Reference SemanticsDescription

TMGI Temporary Mobile Group Identity m 9.2.1.80 PTM Cell List point-to-multipoint cell list 0..<maxnoofCells> ＞C-ID cell identification m 9.2.1.6 ＞Affected UEInformation forMBMSMBMS affected UE information 0..<maxnoofUEs> ＞＞S-RNTI serving RNC wireless network temporary identification m 9.2.1.53 PTP Cell List point-to-point cell list 0..<maxnoofCells> ＞C-ID cell identification m 9.2.1.6 ＞Affected UEInformation forMBMSMBMS affected UE information 0..<maxnoofUEs> ＞＞S-RNTI serving RNC wireless network temporary identification m 9.2.1.53 Not Provided CellList A list of cells that do not provide services 0..<maxnoofCells> ＞C-ID cell identification m 9.2.1.6 ＞Affected UEInformation forMBMSMBMS affected UE information 0..<maxnoofUEs> ＞＞S-RNTI serving RNC wireless network temporary identification m 9.2.1.53 Not Provided UEList UE list that does not provide services ＞＞S-RNTI serving RNC wireless network temporary identification m 0..<maxnoofUEs> 9.2.1.53

in,

PTM Cell List, that is, the point-to-multipoint cell list, is used to bear the cells that need to send MBMS service data through point-to-multipoint;

PTP Cell List, that is, a point-to-point cell list, is used to carry cells that need to send MBMS service data in a point-to-point manner;

Not Provided UE List, that is, the list of UEs that do not provide services, is used to record the information of UEs that have not passed the authentication.

Specifically, after the DRNC obtains the MBMS service key from the BM-SC through the Session Start process, and compares it with the key reported by the UE obtained from the SRNC through the Attach (attach) process, the DRNC lists the UE with the incorrect key In the "Not Provided UE List" list, pass the DIRECT INFORMATION TRANSFER message to the SRNC, and finally, the SRNC sends the MBMS Service Reject message to the UE.

The specific implementation process of the present invention will be described below in conjunction with the accompanying drawings.

The processing process of the MBMS Service Request (MBMS service request) across the corresponding Iur port is as shown in Figure 4, and specifically includes the following steps:

Step 41: UE sends MBMS service request message to SRNC, reports MBMS service key;

Step 42: Execute the Attach (attach) process, the DRNC obtains the key reported by the UE from the SRNC, and the DRNC also obtains the service key from the BM-SC through the MBMS Session Start (MBMS Session Start) process;

In this step, the Attach process and the MBMS Session Start process are independent of each other, and the timing relationship between the two processes is not limited, that is, the Attach process may occur before, after or at the same time as the MBMS Session Start process;

Step 43: The DRNC sends a Direct Information Transfer message to the SRNC, and notifies the SRNC of the verification result of the UE by the DRNC and the data transmission mode and other information;

This step specifically includes: DRNC starts the Counting (counting) process after receiving the MBMS Session Start, and determines each cell in the MBMS service area under it through the UE context that has been obtained and/or the UE context that responds to Counting in the cell under it MBMS data transmission mode, that is, determined as PTP mode or PTM mode; wherein, the Counting process includes: comparing whether the key reported by the UE is the same as the key from the BM-SC, and if they are the same, record the UE into the Among the total number of received users in the cell;

Before the Counting ends, the DRNC can first send a Direct Information Transfer message to the SRNC, which contains the list of UEs that the DRNC has checked out and served by the SRNC without the correct key, so as to notify the SRNC of the UE information that has not passed the verification, so that The SRNC sends a rejection message to the corresponding UE;

After the Counting is over, the DRNC sends a Direct Information Transfer message to the SRNC, which contains the list of cells and UEs served by the SRNC in the cell that are sent by PTM, the list of cells that are sent by PTP and the UEs served by the SRNC in the cell, and List of UEs served by SRNC without correct keys.

In the present invention, it also includes: after the DRNC receives the MBMS Session Start, each Attach process initiated by the SRNC will trigger the DRNC to update the MBMS UE context, determine whether the UE reported key is correct, and whether it is necessary to adjust the transmission mode of the cell, and Pass the result to SRNC through DirectInformation Transfer message.

Step 44: After receiving the Direct Information Transfer message sent by the DRNC, the SRNC performs subsequent MBMS service processing according to the information carried in the message;

The specific treatments used in this step include:

(1) Send an MBMS Service Reject (MBMS service rejection) message to each UE encapsulated in the "Not Provided UElist" in the Direct Information Transfer message, to reject the service request of the UE;

(2) Send an MBMS Modified Services Information (MBMS modified service information) message to each UE encapsulated in the "PTM Cell List" of the Direct Information Transfer message, indicating that the UE service is sent in a PTM manner;

(3) Initiate the PTP radio bearer establishment process to each UE encapsulated in the "PTP Cell List" of the Direct Information Transfer message, and allocate the dedicated resources required for MBMS data transmission, so as to transfer MBMS to the corresponding UE through PTP business.

The present invention also provides an MBMS session start process across the Iur port. When the SRNC is outside the MBMS service area and the DRNC is in the MBMS service area, and the SRNC receives the DirectInformation Transfer message from the DRNC, the message contains "PTP Cell List", and When the SRNC has not received the corresponding MBMS service data from other RNCs, the SRNC will initiate an MBMS session start process to the DRNC.

The specific implementation of the process is shown in Figure 5, which specifically includes the following steps:

Step 61: The DRNC sends a Direct Information Transfer message to the SRNC, and the message includes "PTP Cell List", that is, the message includes cell information that can receive MBMS service data through PTP through authentication;

The SRNC receives the Direct Information Transfer message from the DRNC, and according to the "PTP Cell List" contained in the message, determines that some cells under the DRNC will use PTP to send MBMS services; moreover, some UEs served by the SRNC are located in these In the cell, the SRNC needs to perform step 62;

Step 62: SRNC sends an MBMS session start request message to DRNC;

This step is specifically: after the SRNC receives the Direct Information Transfer message, if it does not currently receive the corresponding MBMS service data from any RNC (such as DRNC), that is, the SRNC has not obtained the corresponding MBMS service data, then the SRNC needs to send the message to the DRNC. MBMS session start request message, in order to obtain corresponding MBMS service data from DRNC, the service identification of MBMS service and the TEID (tunnel end point identification) that is used for Iur bearing plane are carried in the described MBMS session start request message, DRNC uses this TEID To forward MBMS data to SRNC;

In order to facilitate DRNC to transmit MBMS service data to SRNC, specifically, an Iu-PS (packet switching Iu interface) user plane protocol stack can be introduced at the Iur interface, so that the Iur interface also provides a permanent IP channel, and then the corresponding Iu-PS user interface can be used The communication between RNCs can be implemented on the user plane, or other user plane protocol stacks can also be used to implement the communication between RNCs.

Step 63: After receiving the MBMS session start request message, the DRNC will return the MBMS session start response message to the SRNC, and forward the MBMS service data to the SRNC;

Step 64: After receiving the MBMS session start response message, the SRNC establishes necessary radio resources for the UE's MBMS data transmission;

Step 65: The DRNC sends the MBMS service to the SRNC, and the SRNC sends it to the UE.

In the present invention, if the SRNC receives the verification result for the UE returned by the DRNC as passing the verification, and the SRNC has obtained the MBMS service data that needs to be sent to the UE, it does not need to perform steps 62 and 63, and directly transfers the corresponding MBMS service data to the UE. Data is sent to UE.

In the present invention, also comprise the MBMS Session Stop (MBMS session stop) process of crossing Iur mouth, described MBMS Session Stop process of crossing Iur mouth is divided into SRNC initiates and DRNC initiates two kinds of situations, will explain respectively below.

The corresponding SRNC-initiated session stop processing process is shown in Figure 6, specifically including:

Step 71: SRNC sends MBMS session stop request message to DRNC, promptly sends MBMSSession Stop Request message;

Specifically: when an RNC is outside a certain MBMS service area, and no longer serves as any UE's SRNC to forward MBMS data to the UE or after a certain period of delay, the RNC sends an MBMS session stop request message to its previously registered DRNC, The message contains the corresponding MBMS service identifier;

Step 72: After the DRNC receives the MBMS session stop request message, it stops forwarding the service data to the SRNC, and returns the MBMS session stop response message, i.e. the MBMS Session Stop Response message, to the SRNC;

The SRNC removes the corresponding Iur port data bearer after receiving the MBMS session stop response message.

The corresponding DRNC-initiated session stop processing process is shown in Figure 7, specifically including:

Step 81: the DRNC stops forwarding the corresponding MBMS service data to the SRNC, and sends an MBMS session stop request message to the SRNC, and the message includes the corresponding MBMS service identifier;

Specifically: when the DRNC receives the Session Stop Request message from the SGSN, if the DRNC is forwarding the corresponding MBMS service data to other RNCs (that is, each SRNC), the DRNC initiates the MBMS session stop process to these RNCs, that is, to the corresponding SRNC Send MBMS SessionStop Request message;

Step 82: After receiving the MBMS session stop request message, the SRNC removes the corresponding Iur data bearer, and responds to the DRNC with a MBMS session stop response message, ie, an MBMS SessionStop Response message.

The present invention also provides a system for carrying out MBMS services in a network, the specific implementation structure of which is shown in Figure 8, including the following processing units:

(1) Information interaction processing device

The unit is set in the RNC under the MBMS service area and the serving RNC of the user equipment, and is responsible for information exchange between the RNC under the MBMS service area and the serving RNC;

In the system of the present invention, the corresponding information interaction processing device may specifically include:

The user equipment key sending unit is arranged in the serving RNC and is used to send the key information provided by the user equipment to the RNC under the MBMS service area;

The verification processing unit is arranged in the RNC under the MBMS service area, and is used to verify the user equipment according to the key information of the user equipment, and obtain a verification result;

The verification result sending unit is arranged in the RNC under the MBMS service area, and is used to send the verification result obtained by the verification processing unit to the serving RNC;

The verification result receiving unit is set in the serving RNC, and is used for receiving the verification result information for the user equipment sent by the verification result sending unit, and triggering the MBMS service sending unit according to the verification result.

Wherein, in order to realize the triggering of the MBMS service sending unit according to the verification result, the information interaction processing device further includes:

The session start request initiation unit is arranged in the serving RNC, and is used to send a session start request message to the RNC under the MBMS service area after the user equipment is authenticated;

The session start processing unit is set in the RNC under the MBMS service area, and is used to trigger the MBMS service sending unit according to the received session start request.

(2) MBMS service sending unit

The unit is set in the RNC under the MBMS service area, and is used to send MBMS services to the serving RNC, which may be triggered by a session start request message sent by the serving RNC.

(3) MBMS service reception processing unit

The unit is set in the serving RNC, and is used for sending the received MBMS service to the user equipment after receiving the MBMS service from the RNC under the MBMS service area.

The system of the present invention also includes a session stop processing unit, which is set in the serving RNC or the RNC under the MBMS service area, and is used for initiating the MBMS service stop processing process, and triggering the dismantling of the communication between the serving RNC and the RNC under the MBMS service area. Corresponding to the data bearer; specifically, through the session stop request and response message exchanged between the serving RNC and the RNC under the MBMS service area, MBMS service stop processing is realized, and corresponding radio bearer resources are reclaimed.

The system of the present invention may further include a service trigger processing unit, which is set in the serving RNC, and is used to trigger the information interaction processing device after receiving the MBMS service request message sent by the user equipment.

To sum up, the present invention can enable the SRNC outside the MBMS service area to correctly process the UE's service request message, and provide normal MBMS service for the UE with service authority. At the same time, the invention also simplifies the RNC registration process in the standard MBMS solution, so that the registration process does not involve the core network and simplifies the signaling process.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (13)

1. A method for carrying out MBMS services in a network, comprising providing MBMS services for user equipment through a radio network controller RNC under a broadcast multicast MBMS service area, characterized in that, comprising: The RNC under the MBMS service area exchanges information with the serving RNC of the user equipment, and the serving RNC receives the MBMS service sent by the RNC under the MBMS service area; The serving RNC sends the received MBMS service to the user equipment; Wherein, the process of information exchange includes: after the serving RNC receives the MBMS service request sent by the user equipment, it sends the key information sent by the user equipment to the RNC under the MBMS service area; The RNC verifies the user equipment according to the key information, and returns the verification result to the serving RNC; In addition, the serving RNC is an RNC outside the MBMS service area, and the user equipment is under the RNC under the MBMS service area. 2. The method according to claim 1, further comprising: After the serving RNC receives the MBMS service request message sent by the user equipment, it triggers the process of information exchange between the RNC under the MBMS service area and the serving RNC of the user equipment. 3. The method according to claim 1, characterized in that, the RNC under the MBMS service area specifically provides the user equipment with the service key obtained from the broadcast multicast service center through the MBMS service session initiation process. The key information is verified. 4. The method according to claim 1, further comprising: When the serving RNC confirms that the user equipment has not passed the authentication according to the verification result sent by the RNC under the MBMS service area, it sends an MBMS service rejection message to the user equipment. 5. The method according to claim 1, characterized in that, the process for realizing that the serving RNC receives the MBMS service sent by the RNC under the MBMS service area specifically includes: If the serving RNC determines that the user equipment has passed the verification according to the verification result sent by the RNC under the MBMS service area, and the serving RNC has not obtained the corresponding MBMS service from the RNC under the MBMS service area, then the serving RNC will go to the MBMS service area The RNC sends a session start request message, which includes the MBMS service identifier and the tunnel endpoint identifier TEID that need to obtain the service key information; The RNC under the MBMS service area returns a session start response message to the serving RNC, and uses the TEID to send the MBMS service to the serving RNC; The serving RNC receives the MBMS service sent by the RNC under the MBMS service area. 6. The method according to claim 1, further comprising: After the serving RNC receives the verification result sent by the RNC under the MBMS service area and determines that the user equipment has passed the verification, if the serving RNC has obtained the corresponding MBMS service from the RNC under the MBMS service area, it will directly provide the user equipment with the MBMS business. 7. The method according to claim 1, further comprising: When the serving RNC no longer needs to forward the MBMS data to the user equipment, the serving RNC sends an MBMS session stop request to the RNC under the MBMS service area; After the RNC in the MBMS service area receives the MBMS session stop request, it stops forwarding the corresponding MBMS service data to the serving RNC, and triggers the removal of the data bearer between the serving RNC and the RNC in the MBMS service area. 8. The method according to claim 1, further comprising: When the RNC under the MBMS service area determines to no longer send MBMS data to the serving RNC, it sends an MBMS session stop request to the serving RNC; After receiving the MBMS session stop request, the serving RNC removes the data bearer between the serving RNC and the RNC under the MBMS service area. 9. The method according to claim 1, further comprising: When the RNC under the MBMS service area receives the session stop request from the SGSN, it determines that it no longer needs to send MBMS data to the serving RNC. 10. A system for carrying out MBMS services in a network, characterized in that it includes: An information interaction processing device, used for information exchange between the RNC under the MBMS service area and the serving RNC; The MBMS service sending unit is arranged in the RNC under the MBMS service area, and is used to send the MBMS service to the serving RNC; The MBMS service reception processing unit is arranged in the serving RNC, and is used for sending the received MBMS service to the user equipment after receiving the MBMS service sent by the RNC under the MBMS service area; Wherein, the information interaction processing device specifically includes: The user equipment key sending unit is arranged in the serving RNC and is used to send the key information provided by the user equipment to the RNC under the MBMS service area; The verification processing unit is arranged in the RNC under the MBMS service area, and is used to verify the user equipment according to the key information of the user equipment, and obtain a verification result; The verification result sending unit is arranged in the RNC under the MBMS service area, and is used to send the verification result obtained by the verification processing unit to the serving RNC; The verification result receiving unit is set in the serving RNC, and is used to receive the verification result information for the user equipment sent by the verification result sending unit, and trigger the MBMS service sending unit according to the verification result; In addition, the serving RNC is an RNC outside the MBMS service area, and the user equipment is under the RNC under the MBMS service area. 11. The system according to claim 10, wherein the information interaction processing device further comprises: The session start request initiating unit is arranged in the serving RNC, and is used to send a session start request message to the RNC under the MBMS service area after the user equipment passes the authentication; The session start processing unit is set in the RNC under the MBMS service area, and is used to trigger the MBMS service sending unit according to the received session start request. 12. The system according to claim 11, further comprising: The session stop processing unit is set in the serving RNC or the RNC under the MBMS service area, and is used for initiating the MBMS service stop processing process, and triggering the removal of the corresponding data bearer between the serving RNC and the RNC under the MBMS service area. 13. The system according to claim 10, further comprising: The service trigger processing unit is set in the serving RNC, and is used to trigger the information interaction processing device after receiving the MBMS service request message sent by the user equipment.

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