CN1177446C

CN1177446C - Method for realizing grouping business from single information source to multiple receive point

Info

Publication number: CN1177446C
Application number: CNB02100756XA
Authority: CN
Inventors: ��Ǿ�; 武亚娟; 赵建国
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2002-01-23
Filing date: 2002-01-23
Publication date: 2004-11-24
Anticipated expiration: 2022-01-23
Also published as: CN1434612A

Abstract

The present invention discloses a packet data service implementation method for a single information source to multiple receiving points. Firstly, a user requests a service through a packet date protocol (PDP) context activated process; then an application service server transmits service data to the user through GGSN, SGSN and RNC in turn; in the PDP context activated process, mapping tables which comprise a service data source GGSN, service RNC and an access point name APN are filled in each SGSN; mapping tables which comprise service SGSN and APN are filled in each GGSN; in the process of transmitting service data to the user, according to the mapping tables, only one GPRS tunnel GTP is selected for each APN in the connection of the GGSN with each SGSN and the connection of the SGSN with each RNC to transmit to notably enhance the availability of resources for loading networks.

Description

A kind of single information source is to the Packet data service implementation method of multi-destination

Technical field

The present invention relates to the packet data network technology, relate in particular to the Packet data service implementation method of a kind of single information source to multi-destination.

Background technology

Rapid growth along with data service, more and more can't satisfy user's demand based on GSM (global system for mobile communications) mobile communication system of circuit switching, therefore having occurred is GPRS (GPRS) network of feature with the packet switching, circuit domain core network and packet domain core network network further merge and become UMTS (universal mobile telecommunications system) network, realize the packetizing structure of core network.Network based on packet switching can be that unit realizes dynamic routing with the packet, will set up special-purpose the connection with circuit switching and compare, and has improved utilization rate of network resource greatly.

Packet switching network can also provide bearer service as the bearing bed of other application except various packet switched data services can be provided, therefore can introduce diversified applied business in packet switching network.Among these applied business, the business that has a type is to send same message to a plurality of users simultaneously from a message source, and typical case's representative of this class business is broadcasting service and multicast service.

Existing cell broadcaste service uses circuit exchange mode or block exchange mode to transmit data, is used in GSM network, GPRS network and the UMTS network.Cell broadcast messages is organized by the form of page or leaf at CBC, every page of cell broadcast messages is made up of 82 bytes, be encoded to 93 characters by 7 of ascii characters, also needing to do some headers in the process that is mail to UE (subscriber equipment) or MS (travelling carriage) by CBC (CBC) handles, therefore the realization mechanism of Cell Broadcast CB has been doomed message based type of service can only be provided, can't carry out the transfer of data of two-forties such as audio frequency, video, Streaming Media, and adopt store-and-forward mode to manage business, can not guarantee real-time.

In mobile communications network, realize the networking of IP (Internet protocol) multicast service and protocol stack as shown in Figure 1, wherein subscriber equipment refers to various portable terminals, subscriber equipment is connected to by the ip multicast application protocol on the ip multicast application server that is positioned at external network, and external network is connected by Gi (GGSN and ip multicast application server) interface with GGSN (GGSN).Externally have an agent entity to link to each other with GGSN in the GPRS network in the network, this agent entity and GGSN constitute peer layer, all will realize PIM (with the multicast of protocol-independent) agreement or other multicast protocols.GGSN serves as ip multicast agency's role between subscriber equipment and ip multicast application server, SGSN is as the part of packet domain carrying, and is invisible at the IP layer.In addition, in order to control the ip multicast application protocol, also to realize IGMP (IGMP) agreement on subscriber equipment and the GGSN.

In above-mentioned protocol stack, portable terminal is equivalent to add the main frame of multicast group, GGSN has realized IGMP and PIM Routing Protocol, be equivalent to support the router of multicast function, the air interface part and the core net part of mobile communications network are common as the packet domain bearing part among Fig. 1, carrying IP agreement.In realization, GGSN is from ip multicast application server receiving multicast traffic message, and going out according to the IP Address Recognition is cast service data, sends to a plurality of subscriber equipmenies place with the IP agreement after duplicating.But when in the packet domain bearer network, transmitting, SGSN that conductively-closed is fallen and wireless access mesh portions do not know that these data are cast service datas, therefore, as shown in Figure 2, wherein, band arrow solid line is represented the business datum transmission, as seen, even the subscriber equipment that receives data is all by same SGSN service, be positioned at same sub-district, also to use a paging channel to come the paging portable terminal separately, make that the resource utilization of bearer network is lower for each user sets up a data transmission channel separately.

Summary of the invention

The object of the present invention is to provide a kind of optimization packet domain core network network resource, to realize the method for single information source to the Packet data service of multi-destination.

For achieving the above object, the technical solution used in the present invention is: a kind of single information source is to the Packet data service implementation method of multi-destination, at first pass through packet data protocol pdp context activation requested service by the user, again by the applied business server successively through general packet radio service gprs gateway support node GGSN, GPRS serving GPRS support node SGSN, radio network controller (RNC) is given the user with business data transmission, in described pdp context activation, fill in the mapping table that comprises following information in each SGSN: (1) provides the GGSN in business datum source; (2) RNC that serves for the activating service user; (3) sign connects concrete professional Access Point Name APN; Fill in the mapping table that comprises following information in each GGSN: (1) is for activating the SGSN of multicast service user service; (2) sign connects concrete professional Access Point Name APN; In described business data transmission is given user's process,, in being connected of GGSN and each SGSN, each APN is only chosen a GPRS tunnel GTP and transmit according to above-mentioned mapping table; In being connected of SGSN and each RNC, each APN is only chosen a GTP tunnel transmission.

Owing to adopt above technical scheme, in pdp context activation, by filling in mapping table, with between GGSN and SGSN, SGSN and RNC about broadcasting and the parameter of multicast service record in addition, give in user's the process in business data transmission, can reflect that by mapping table the subscriber equipment of which reception data is by same SGSN service, is positioned at same sub-district, this is set up a data transmission channel, make the resource utilization of bearer network significantly improve.

Description of drawings

Fig. 1 is the protocol stack schematic diagram of Internet Protocol Multicast;

Fig. 2 is broadcasting and a multicast service process of transmitting diagrammatic sketch in the prior art;

Fig. 3 is broadcasting and a multicast service process of transmitting diagrammatic sketch in the inventive method;

Fig. 4 is the pdp context activation figure of requested service;

Figure 5 shows that the list item of mapping table in the inventive method;

Figure 6 shows that the foundation of mapping table in the inventive method and fill in detailed annotation.

Embodiment

Single information source to typical case's application of multi-destination data service is multicast service and broadcasting service.

The inventive method for multicast service, in pdp context activation, is filled in the mapping table that comprises following information in each SGSN in concrete enforcement: (1) provides the GGSN in multi-case data source; (2) for activating the RNC of multicast service user service; (3) the Access Point Name APN of concrete multicast service that sign connects; (4) the multicast service user who is served; Fill in the mapping table that comprises following information in each GGSN: (1) is for activating the SGSN of multicast service user service; (2) sign connects concrete professional Access Point Name APN; (3) the multicast service user who is served;

In described business data transmission is given user's process,, in being connected of GGSN and each SGSN, each APN is only chosen a GTP tunnel and transmit according to above-mentioned mapping table; In being connected of SGSN and each RNC, each APN is only chosen a GTP tunnel transmission;

For broadcasting service, give in user's the process in described business data transmission, GGSN only needs the SGSN that current all existence activate PDP Context is all chosen a GTP tunnel transmission, SGSN only need to current all exist the RNC that activates PDP Contexts all choose a GTP tunnel transmission, need not in mapping table record in addition to all users.

Below with the concrete enforcement of multicast service, the foundation of mapping table is described, we can be provided with a mapping table in GGSN inside, this mapping table shows which the user who has activated at present the reception of multicast service has, which SGSN current all be for these users service, GGSN is according to certain principle, in one or more of connection of it and each SGSN, choose wherein GTP tunnel, the IP datagram of receiving directly is encapsulated in this GTP packet data package, sends to the SGSN that each is receiving multi-case data then.In each SGSN, two mapping tables can be set, a table is used for the GGSN side, shows the multi-case data that is receiving at present from which GGSN, and which the multicast users of oneself serving has, and the table among this table and the GGSN is corresponding to be existed; Another table is used for the RNC side, and the information correspondence of preservation the user who has activated multicast service, and be all RNC of these users service, this table be with RNC in corresponding existence of table.SGSN has just write down the information of these RNC when activating PDP Context, receive after the multi-case data from GGSN, equally, SGSN searches and the corresponding mapping table that exists of RNC side, in the one or more of GTP tunnels of it and each RNC, choose wherein one, after GTP-U (the user plane part agreement of the GPRS Tunnel Protocol) packet of receiving sealed off and reset, send to the RNC that each is receiving multi-case data, realize that SGSN finishes the transmission of multi-case data to a RNC with a link, finishes the data transmission procedure in the core net.

Fig. 4 is the pdp context activation figure of requested service, in the concrete enforcement of the inventive method, fills in mapping table when this process is carried out, and its operation comprises the steps:

1) user sends and has the activation PDP Context request Activate PDPContext Request message of parameter A PN to SGSN;

2) carry out the RAB assigning process;

3) SGSN receives after the Activate PDP Context Request message, and the result who resolves according to APN selects a GGSN.Distribute tunnel end node TEID for this GGSN, if in the configuration of APN be the Packet data service of single information source to multi-destination, the relevant entries that just existing parameter is filled in mapping table, transmission has the PDP Context request of the setting up Create PDP Context Request message of parameter TEID to GGSN then;

4) GGSN receives after the Create PDP Context Request message, corresponding business in the applied business server of activation APN correspondence, and to SGSN distribution other end tunnel end node TEID ', if in the configuration of APN be the Packet data service of single information source to multi-destination, the relevant entries that just existing parameter is filled in mapping table is returned the PDP Context of setting up that has parameter TEID ' then and is replied Create PDP Context Request message to SGSN;

5) SGSN fills in mapping table according to the parameter of returning in the Create PDP Context Request message, and returns and activate PDP Context approval Activate PDP Context Accept message to the user.

Figure 5 shows that the list item structure of the inventive method a kind of SGSN and corresponding mapping table of GGSN one side in the concrete enforcement of multicast service, the execution in step that relates to below in conjunction with Fig. 6 and Fig. 4 describes the foundation of this mapping table in detail and fills in process.

1) user A sends Activate PDP Context Request message to SGSN1, wherein has Access Point Name APN1, and the configuration of APN1 shows selection is certain multicast applied business in the external network;

2) carry out the RAB assigning process;

3) SGSN receives after the Activate PDP Context Request message, and the result who resolves according to APN1 selects a GGSN1.What SGSN1 learnt user A request from the configuration of APN1 is multicast service, set up a mapping table in the GGSN of inside side, i.e. table 1, (the tunnel construction sections node is that SGSN1 distributes to GGSN1 a) to TEIDa wherein, send CreatePDP Context Request message then to GGSN1, have TEIDa in the message.

4) GGSN1 receives after the Create PDP Context Request message, corresponding business in the multicast service server of activation APN1 correspondence, because what GGSN1 learnt from APN1 configuration that the user asks is multicast service, then set up a mapping table in inside, i.e. table 2, TEIDa ' wherein is that GGSN1 distributes to SGSN1, and GGSN1 returns TEIDa ' in Create PDP ContextResponse message.TEIDa is corresponding with TEIDa ', constitutes the transmission channel of user A between SGSN1 and GGSN1.

5) SGSN1 returns Activate PDP Context Accept message and gives user A, at this moment SGSN1 just can be between GGSN1 and user A route PDP packet data package, and begin charging.

If at this moment the user B that is in same sub-district with user A also initiates the registration of multicast service, then carry out following process:

1) user B sends Activate PDP Context Request message to SGSN1, and wherein the configuration among the APN1 shows selection, and what be that multicast applied business in the external network and user A select is same multicast service server;

2) use the RAB assigning process to set up RAB;

3) SGSN1 receives after the Activate PDP Context Request message, what learn user B request from the configuration of APN1 is multicast service, in the mapping table that inside has been set up, increase the record of user B, see Table 3, TEIDb wherein is that SGSN1 distributes to GGSN1, send Create PDP Context Request message then to GGSN1, for the inventive method being described with exemplary embodiments, suppose that promptly APN1 returns among all GGSN of SGSN1 after resolving, the GGSN of selection is identical with the GGSN1 that user A uses.

4) GGSN1 receives after the Create PDP Context Request message, what learn user B request from the APN1 configuration is same class multicast service, in the table that inside is set up, increase the record of user B so, this table points out to have now two users at the multi-case data that receives from same multicast service server, see Table 4, TEIDb ' wherein is that GGSN1 distributes to SGSN1, in Create PDP Context Response message, return then, wherein TEIDb and TEIDb ' corresponding the transmission channel of user B between SGSN1 and GGSN1.

5) SGSN1 returns Activate PDP Context Accept message and gives user B, then SGSN just can be between GGSN1 and user B route PDP packet data package, and begin charging.The list item structure and the foundation of SGSN and the corresponding mapping table of RNC one side and fill in process similarly.

Broadcasting service and multicast service are similar, and its user's number is more than multicast users, and the user that each can receiving broadcast service in the SGSN service area carried out attaching process in SGSN, so needn't carry out the particular user record of mapping table.

During the inventive method is implemented, the RAB assigning process is to be initiated by SGSN, when the RAB allocation request message is used to set up RAB, SGSN uses it for TEID number of receiving data and is placed on RAB and sets up and send to RNC in the request message, sets up SGSN in the response at the RAB that RNC returns and obtains RNC and be used to receive TEID number of data; If the tunnel between RNC and the SGSN changes, promptly distribute and revise corresponding mapping table by RAB, solved a transfer problem that has just moved to another RNC from current Serving RNC the user of receiving multicast traffic.

Choosing a GTP tunnel that is used to transmit data in the inventive method also can realize by a plurality of TEID being corresponded to a method on the actual TEID that uses.

Claims

1, a kind of single information source is to the Packet data service implementation method of multi-destination, it is characterized in that: at first pass through packet data protocol pdp context activation requested service by the user, give the user through general packet radio service gprs gateway support node GGSN, GPRS serving GPRS support node SGSN, radio network controller (RNC) with business data transmission successively by the applied business server again, in described pdp context activation, fill in the mapping table that comprises following information in each SGSN: (1) provides the GGSN in business datum source; (2) RNC that serves for the activating service user; (3) sign connects concrete professional Access Point Name APN; (4) if multicast service also should comprise the multicast service user who is served in this mapping table, if broadcasting service then need not recording user information; Fill in the mapping table that comprises following information in each GGSN: (1) is for activating the SGSN of multicast service user service; (2) sign connects concrete professional Access Point Name APN; (3) if multicast service also should comprise the multicast service user who is served in this mapping table, if broadcasting service then need not recording user information; In described business data transmission is given user's process,, in being connected of GGSN and each SGSN, each APN is only chosen a GPRS tunnel GTP and transmit according to above-mentioned mapping table; In being connected of SGSN and each RNC, each APN is only chosen a GTP tunnel transmission.

2, single information source as claimed in claim 1 is characterized in that to the Packet data service implementation method of multi-destination: in pdp context activation, and the operation of filling in mapping table comprises the steps:

2) carry out the RAB assigning process;

3, single information source as claimed in claim 2 is to the Packet data service implementation method of multi-destination, it is characterized in that: described RAB assigning process is initiated by SGSN, when the RAB allocation request message is used to set up RAB, SGSN uses it for TEID number of receiving data and is placed on RAB and sets up and send to RNC in the request message, sets up SGSN in the response at the RAB that RNC returns and obtains RNC and be used to receive TEID number of data; If the tunnel between RNC and the SGSN changes, promptly distribute and revise corresponding mapping table by RAB.

4, single information source as claimed in claim 2 is characterized in that to the Packet data service implementation method of multi-destination: realize choosing a GTP tunnel that is used to transmit data by a plurality of TEID being corresponded to a method on the actual TEID that uses.