CN102868999A

CN102868999A - Method and system for establishing packet data network connection

Info

Publication number: CN102868999A
Application number: CN201110185466XA
Authority: CN
Inventors: 霍玉臻; 周娜; 王静
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2011-07-04
Filing date: 2011-07-04
Publication date: 2013-01-09

Abstract

The invention discloses a method and a system for establishing packet data network (PDN) connection. The method comprises the following steps: after acquiring establishment information of the PDN connection, UE (User Equipment) utilizes an APN (Access Point Name) which has already established PDN connection to carry out the PDN connection establishment operation when new business stream needs to be started; a mobility management entity reselects a gateway for the PDN connection corresponding to the operation after receiving the PDN connection establishment operation carried out by the UE, wherein the gateway includes one of P-GW (Packet Data Network Gateway), GGSN (Gateway GPRS (General Packet Radio Service) Support Node) and local gateway. The flexibility and performance of the system can be improved through the method.

Description

Packet data network establishment of connection method and system

Technical field

The present invention relates to the communications field, relate in particular to a kind of packet data network (Packet Data Network is referred to as PDN) establishment of connection method and system.

Background technology

Third generation partner program (3rd Generation Partnership Project, referred to as 3GPP) grouping system (the Evolved Packet System of evolution, referred to as EPS) by universal mobile telecommunications system land radio access web (the Evolved Universal Terrestrial Radio Access Network of evolution, referred to as E-UTRAN), mobile management entity (Mobility Management Entity, referred to as MME), gateway (Serving Gateway, referred to as SGW), grouped data network gateway (Packet Data Network Gateway, referred to as PGW), home subscriber server (Home Subscriber Server, referred to as HSS), authentication and authorization charging (the Authentication of 3GPP, Authorization andAccounting, referred to as AAA) server, "Policy and Charging Rules Function (Policy and Charging Rules Function is referred to as PCRF) entity and other support nodes form.Wherein, P-GW is also referred to as grouped data network gateway (Packet Data Network Gateway is referred to as PDN GW).

Fig. 1 a is the schematic diagram that cordless communication network according to correlation technique connects, and as shown in Figure 1a, Mobility Management Entity is responsible for the related work of the chains of command such as the processing of mobile management, Non-Access Stratum signaling and the contextual management of user's mobile management; The core net gateway comprises core net SGW and core net IAD (PGW), and the Authentication Authorization server comprises HSS and 3GPPAAA server.Wherein, SGW is the accessing gateway equipment that links to each other with E-UTRAN, forwarding data between E-UTRAN and PGW, and be responsible for the pending datas such as paging are carried out buffer memory; PGW is the borde gateway of EPS and PDN network, is responsible for the access of PDN and the function such as forwarding data between EPS and PDN.

Base station from home is a kind of small-sized, lower powered base station, be deployed in the indoor places such as family and office, Main Function is in order higher service rate to be provided to the user and to reduce and use the needed expense of high rate services, remedying simultaneously the deficiency that existing distributed cellular radio communication system covers.The advantage of base station from home is economical, convenient, low-power output, plug and play etc.

As shown in Figure 1a, base station from home can be directly connected to core network, also can be linked into core network (shown in Fig. 1 b or Fig. 1 c) by this logical ne of home base-station gateway, and in the family expenses base station system, the wireless side network element refers to Home eNodeB.Wherein, the major function of home base-station gateway is: the fail safe of checking base station from home, process base station from home registration, to base station from home carry out operation maintenance management, according to Carrier Requirements configuration and control base station from home, be responsible for the data of exchcange core net and base station from home.In Fig. 1 a, Fig. 1 b or Fig. 1 c, the core net gateway can be SGW, PGW, Serving GPRS Support Node (Serving GPRS SupportNode, referred to as SGSN), Gateway GPRS Support Node (Gateway GPRS Support Node, referred to as GGSN), wherein, GPRS refers to GPRS.

Except the access of supporting mobile core network, mobile communication system (comprising home base station system) also can be supported the IP diverter function, this function comprises local IP access (Local IPAccess, referred to as LIPA) and selectivity IP transmission shunting (Selected IP Traffic Offload is referred to as SIPTO).Possess at the wireless side network element under the condition of IP shunting ability and the signatory IP of the permission shunting of user, realize that terminal is to this locality access of the IP device in other IP devices of home network, the enterprise network or internet.In order to realize the IP diverter function, set up local gateway, shown in Fig. 1 a, Fig. 1 b, Fig. 1 c.

Setting up of local gateway can provide providing powerful support for the IP dividing technology, local gateway (for example is linked into external network as this locality, Internet) gateway, address assignment is provided, charging, the grouping packet filtering, policy control, the data distribution function, NAS/S1-AP/ wireless access network applying portion (Radios Access Network Application Part, referred to as RANAP)/GTP (General Tunneling Protocol, general tunnel protocol)/proxy mobile IP protocol (Proxy Mobile IP, referred to as PMIP)/mobile IP protocol (Mobile IP, referred to as MIP) message parse, network address translation (Network Address Translation is referred to as NAT), the functions such as IP distributing strategy route and execution.Local gateway can close with the wireless side network element and establish or be arranged near the wireless side network element in external mode, also can close with home base-station gateway and establish or be arranged near the home base-station gateway in external mode.Local gateway can be local SGW (Local SGW, referred to as L-SGW), local PGW (Local PGW, referred to as L-PGW), virtual SGW (Virtual SGW, referred to as V-SGW), virtual PGW (Virtual PSGW, referred to as V-PGW), local GGSN (Local GGSN is referred to as L-GGSN), external shunting gateway, can also be the data distribution functional entity.

Fig. 2 a is the schematic diagram according to a wireless communication system IP streamed data of correlation technique, Fig. 2 b is the schematic diagram according to another wireless communication system IP streamed data of correlation technique, shown in Fig. 2 a, Fig. 2 b, shown in the mobile communications network framework, IP shunts and connects and the data flow path that is connected the IP core network connection.For the user who supports that the IP shunting connects, can set up traditional IP core network connection data path and IP shunting connection data path.Wherein, IP streamed data path is: from terminal to the wireless side network element and/or home base-station gateway until local gateway, data transfer is without core net.In order to realize terminal to this locality access of other IP devices of home network or internet, can set up two connection: article one IP shunting connection data paths and directly access the Internet, that is, the Internet local IP access connects; Second IP shunting connected reference data path is directly accessed other IP devices of home network, that is, the home network local IP access connects.IP shunting also can realize by setting up the NAT address translation feature at wireless side network element or home base-station gateway or local gateway, be not limited to connect the access function that realizes simultaneously core net access and IP shunting by difference.

At present, in order to keep business continuance, no matter whether the user moves, and user's PDN connects must anchor to original P-GW/ local gateway.After the user moves, even there is more suitably the P-GW/ local gateway to serve for the user, can not reselect the P-GW/ local gateway.Therefore, existing mobility management mechanism can cause the circuitous problem of route, has increased simultaneously transmission cost, has increased service delay, has reduced user's experience.This problem is especially outstanding in the system that realizes the IP dividing technology.In the IP separate system, the local gateway position moves down, and service range is dwindled, and the mobile appearance of spanning gateway is more frequent, and therefore, the problem that route is made a circulation is more outstanding.

In order to address this problem, proposed after the user moves, it is that the user can set up new PDN and connects that the new Business Stream of user can be selected new anchor point, by this method, can be so that the path optimization of the new Business Stream of user.New PDN connects can use new APN (Access Point Name, referred to as APN), also can use and originally set up the APN that PDN connects, if each mobile, user's new business is all used new APN, then need operator to provide quantity a lot of APN for the user, meeting is so that operator safeguards complexity, and the user configures complexity; If each mobile, user's new business is all used original APN.But in correlation technique, many PDN connections all can only be selected same P-GW/ local gateway to single APN, can not satisfy the demand of routing optimality.

Summary of the invention

Main purpose of the present invention is to provide a kind of PDN establishment of connection scheme, to solve at least the problem that can't satisfy the requirement of client's routing optimality in the above-mentioned correlation technique.

To achieve these goals, according to an aspect of the present invention, provide a kind of PDN establishment of connection method.

According to PDN establishment of connection method of the present invention, may further comprise the steps: UE obtain PDN connect set up information after, if when needing to initiate new Business Stream, use and set up APN that PDN connects and initiate PDN and connect and set up operation; Mobility Management Entity receive the PDN that initiates from UE connect set up operation after, reselect gateway for the PDN of this operational correspondence connects, it is one of following that gateway comprises: P-GW, GGSN, local gateway.

Preferably, Mobility Management Entity reselects gateway for the PDN of this operational correspondence connects and comprises: Mobility Management Entity is connected in the situation that the IP shunting connects at the PDN that determines this operational correspondence, reselects gateway for this IP shunting connects.

Preferably, in the flow process of Mobility Management Entity one of below at least PDN connected and set up information and send to UE: tracing section updating flow process, Routing Area Update flow process, service request flow process, PDN connection building process, PDP context activation flow process, attachment flow.

Preferably, Mobility Management Entity connects the information of setting up with PDN and sends to UE and comprise: Mobility Management Entity determines whether that needs send the PDN connection and set up information to UE; If, then Mobility Management Entity is set up information with the PDN connection and is sent to UE, and UE preserves the PDN connection from Mobility Management Entity that receives and sets up information or connect the PDN connection opening relationships information that the information of setting up is newly-built or preserve renewal this locality according to PDN.

Preferably, use set up APN that PDN connects initiate PDN connect set up operation before, UE connects opening relationships information according to PDN and is defined as new Business Stream and uses and set up APN that PDN connects and set up and be connected with the PDN of this operational correspondence.

Preferably, PDN connects opening relationships information and comprises one of following at least: the local PDN that preserves of UE connects the information of setting up, PDN and connects the collocation strategy information of setting up tabulation, UE self, carries out PDN from ANDSF being used for of obtaining and connect and set up the policy information of judging.

Preferably, Mobility Management Entity determines whether need to send PDN and connects the information of setting up and comprise to UE: Mobility Management Entity determines according to user signing contract information and/or carrier policy user's IP shunting connects whether support mobility; If support, then Mobility Management Entity sends the PDN connection and sets up information to UE.

Preferably, support mobility to comprise that the IP shunting connects needs and supports the continuity new position that is connected with UE can set up IP shunting connection.

Preferably, Mobility Management Entity sends PDN and connects the information of setting up and comprise to UE: mobile management entity connects the information of setting up with PDN and is carried at NAS message and sends to UE; Perhaps, mobile management entity connects PDN by S1 or Iu message to be set up information and sends the wireless side network element to, by the wireless side network element PDN is connected the information of setting up again and is carried in the RRC message and sends to UE.

Preferably, PDN connects the information of setting up and comprises one of following at least: the connection type of the built vertical connection of user, APN and corresponding relation, the network of its connection type determine to set up policy information and/or the IP that the IP shunting is connected and shunt the CAMEL-Subscription-Information of connection; Wherein, the connection type of the built vertical connection of user is for one of following at least: existing connection is that the IP shunting connects, existing connection is not that the IP shunting connects, the existing connection be the APN that core net connects; APN and the corresponding relation of connection type comprise can set up APN that the IP shunting is connected and/or the APN of core net connection.

Preferably, Mobility Management Entity is one of following: MME, MSC, SGSN.

To achieve these goals, according to a further aspect in the invention, also provide a kind of PDN establishment of connection system.

According to PDN establishment of connection of the present invention system, comprise UE and Mobility Management Entity, wherein, UE comprises: initiation module, be used for when needs are initiated new Business Stream, the APN that uses built vertical PDN to connect initiates PDN and connects and set up operation; Mobility Management Entity comprises: select module, be used for receive the PDN that initiates from UE connect set up operation after, reselect gateway for the PDN of this operational correspondence connects, it is one of following that gateway comprises: P-GW, GGSN, local gateway.

Preferably, Mobility Management Entity also comprises: determination module, be used for according to user signing contract information and/or carrier policy, and determine whether that needing to send the PDN connection sets up information to UE; UE also comprises: receiver module, be used in the situation that determination module determines that needing to send PDN connects the information of setting up, and the PDN that receives from Mobility Management Entity connects the information of setting up; And update module, set up information or connect the PDN connection opening relationships information that the information of setting up is newly-built or preserve renewal this locality according to PDN for preserving the PDN connection.

Preferably, UE also comprises: determination module, be used for use set up APN that PDN connects initiate PDN connect set up operation before, connect opening relationships information according to PDN and be defined as new Business Stream and use and set up APN that PDN connects and set up and be connected with the PDN of this operational correspondence.

By the present invention, adopt Mobility Management Entity to connect the mode that reselects P-GW or local gateway for using already present APN to initiate PDN, solved the problem that can't satisfy the requirement of client's routing optimality in the correlation technique, improved flexibility and the performance of system.

Description of drawings

Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:

Fig. 1 a is the schematic diagram according to a cordless communication network connection of correlation technique;

Fig. 1 b is the schematic diagram according to another cordless communication network connection of correlation technique;

Fig. 1 c is the schematic diagram according to the again cordless communication network connection of correlation technique;

Fig. 2 a is the schematic diagram according to a wireless communication system IP streamed data of correlation technique;

Fig. 2 b is the schematic diagram according to another wireless communication system IP streamed data of correlation technique;

Fig. 3 is the flow chart according to the PDN establishment of connection method of the embodiment of the invention;

Fig. 4 is the structured flowchart according to the PDN establishment of connection system of the embodiment of the invention;

Fig. 5 is the structured flowchart of PDN establishment of connection system according to the preferred embodiment of the invention;

Fig. 6 is the schematic diagram according to the wireless communication system IP streamed data of the embodiment of the invention one;

Fig. 7 is the flow chart according to the tracing section updating of the embodiment of the invention two;

Fig. 8 is the flow chart that connects foundation according to the PDN of the embodiment of the invention three;

Fig. 9 is the flow chart that the user according to the embodiment of the invention four adheres to.

Embodiment

Hereinafter also describe in conjunction with the embodiments the present invention in detail with reference to accompanying drawing.Need to prove, in the situation that do not conflict, embodiment and the feature among the embodiment among the application can make up mutually.

According to the embodiment of the invention, provide a kind of PDN establishment of connection method.Fig. 3 is that as shown in Figure 3, the method may further comprise the steps according to the flow chart of the PDN establishment of connection method of the embodiment of the invention:

Step S302, user terminal (User Equipment is referred to as UE) obtain PDN connect set up information after, if when needing to initiate new Business Stream, use the APN that has set up the PDN connection to initiate PDN and connect foundation operation (that is, initiate the many PDN connections of single APN and set up operation);

Step S304, Mobility Management Entity receive the PDN that initiates from UE connect set up operation after, reselect gateway for the PDN of this operational correspondence connects, wherein, it is one of following that this gateway comprises: P-GW, GGSN, local gateway.

Pass through above-mentioned steps, adopt Mobility Management Entity to connect the mode that reselects gateway for using the APN that has set up the PDN connection to set up PDN, solve the problem that can't satisfy the requirement of client's routing optimality in the correlation technique, improved flexibility and the performance of system.

Preferably, in step S304, Mobility Management Entity is connected in the situation of IP shunting connection at the PDN that determines to have used this APN to set up PDN connection and this operational correspondence, reselects gateway for this IP shunting connects.

Preferably, in step S302, in the flow process that Mobility Management Entity one of can be below at least PDN connected and set up information and send to UE: tracing section updating flow process, Routing Area Update flow process, service request flow process, PDN connection building process, PDP context activation flow process, attachment flow.

Preferably, in step S302, Mobility Management Entity can determine whether that needing to send the PDN connection sets up information to UE; If, then Mobility Management Entity is set up information with the PDN connection and is sent to UE, and UE preserves the PDN connection from Mobility Management Entity that receives and sets up information or connect the PDN connection opening relationships information that the information of setting up is newly-built or preserve renewal this locality according to PDN.The method can improve validity and the accuracy of system.

Preferably, in step S302, UE can connect opening relationships information according to PDN and be defined as new Business Stream and use and set up APN that PDN connects and set up and be connected with the PDN of this operational correspondence.

Preferably, Mobility Management Entity determines whether need to send PDN and connects the information of setting up and comprise to UE: Mobility Management Entity determines according to user signing contract information and/or carrier policy user's IP shunting connects whether support mobility; If support, then Mobility Management Entity sends the PDN connection and sets up information to UE.The method can improve the adaptive capacity of system.

Preferably, in step S302, mobile management entity can connect PDN the information of setting up and be carried at NAS message and send to UE; Perhaps, mobile management entity connects PDN by S1 or Iu message to be set up information and sends the wireless side network element to, by the wireless side network element PDN is connected the information of setting up again and is carried in the RRC message and sends to UE.The method can improve the flexibility of system.

Preferably, PDN connects the information of setting up and comprises one of following at least: the connection type of the built vertical connection of user, APN and corresponding relation, the network of its connection type determine to set up policy information and/or the IP that the IP shunting is connected and shunt the CAMEL-Subscription-Information of connection; Wherein, the connection type of the built vertical connection of user is for one of following at least: existing connection is that the IP shunting connects, existing connection is not that the IP shunting connects, the existing connection be the APN that core net connects; APN and the corresponding relation of connection type comprise can set up APN that the IP shunting is connected and/or the APN of core net connection.The method is simple and practical, workable.

Preferably, above-mentioned PDN connects opening relationships information and comprises one of following at least: the local PDN that preserves of UE connects the information of setting up, PDN and connects the collocation strategy information of setting up tabulation, UE self, carries out PDN from ANDSF being used for of obtaining and connect and set up the policy information of judging.The method is simple and practical, workable.

Preferably, Mobility Management Entity can be for one of following: MME, MSC, SGSN.

Need to prove, the PDN establishment of connection method that the embodiment of the invention provides is applicable to one of following at least system: UTRAN system, E-UTRAN system, EDGE wireless access system, EPS connecting system, home base station system.

Corresponding to said method, the embodiment of the invention also provides a kind of PDN establishment of connection system.Fig. 4 is the structured flowchart according to the PDN establishment of connection system of the embodiment of the invention, as shown in Figure 4, this PDN establishment of connection system comprises, UE 42 and Mobility Management Entity 44, wherein, UE 42 comprises: initiation module 422, be used for obtain PDN connect set up information after, if when needing to initiate new Business Stream, the APN that uses built vertical PDN to connect initiates the PDN connection and sets up operation; Mobility Management Entity 44 comprises: select module 442, be coupled to initiation module 422, be used for receive the PDN that initiates from UE 42 connect set up operation after, reselect gateway for the PDN of this operational correspondence connects, it is one of following that this gateway comprises: P-GW, GGSN, local gateway.

By above-mentioned PDN establishment of connection system, adopt Mobility Management Entity 44 to connect the mode that reselects gateway for using the APN that has set up the PDN connection to set up PDN, solve the problem that can't satisfy the requirement of client's routing optimality in the correlation technique, improved flexibility and the performance of system.

Fig. 5 is the structured flowchart of PDN establishment of connection system according to the preferred embodiment of the invention, as shown in Figure 5, Mobility Management Entity 44 also comprises: determination module 444, be used for according to user signing contract information and/or carrier policy, and determine whether that needing to send the PDN connection sets up information to UE 42; UE 42 also comprises: receiver module 424, be coupled to determination module 444, and be used in the situation that determination module 444 determines that needing to send PDN connects the information of setting up, the PDN that receives from Mobility Management Entity 44 connects the information of setting up; And update module 426, be coupled to receiver module 424, set up information or connect the PDN connection opening relationships information that the information of setting up is newly-built or preserve renewal this locality according to PDN for preserving the PDN connection.

Preferably, UE 42 also comprises: determination module 428, be coupled to update module 426 and initiation module 422, for before using the APN initiation PDN connection foundation operation of having set up the PDN connection, be defined as new Business Stream according to PDN connection opening relationships information and set up the many PDN connections of single APN.

Be elaborated below in conjunction with the implementation procedure of preferred embodiments and drawings to above-described embodiment.

Embodiment one

The present embodiment is described in the communication system that realizes IP shunting interconnection technique take the E-UTRAN system as example, for the many PDN of single APN connect the related procedure of selecting different P-GW/ local gateways.

Particularly, when being moved the sexual behavior part, after Mobility Management Entity obtained CAMEL-Subscription-Information, shunting connected and carries out the access control judgement and mobility is judged to IP, supported mobile then PDN the connection to set up information and send to UE if the IP shunting connects; UE preserves the PDN connection that obtains and sets up information, so that the follow-up judgement that connects foundation.When UE need to initiate new Business Stream, UE connected the information of setting up based on PDN and judges whether to set up the many PDN connections of single APN, if need, then uses former APN to initiate the PDN connection and sets up.Set up in the process in the PDN connection, Mobility Management Entity detects finds that this APN has set up the PDN connection, reselects the P-GW/ local gateway for this PDN connects.

Need to prove, all embodiment of the present invention all are applicable to UTRAN/GERAN access network and home base station system.If access UTRAN system, then the core net gateway is GGSN, if access E-UTRAN system, then the core net gateway refers to core net gateway (S-GW) and core net IAD (P-GW).The system of access is different, and message is different, but acts on similarly, and the flow process of local gateway being obtained distributing strategy is similar to following embodiment, can not impact elaboration the present invention.

Preferably, the wireless side network element can be base station, base station from home, RNC, shunting gateway, diverter function entity, home base-station gateway; Mobility Management Entity can be MME, MSC, SGSN.

Preferably, the IP shunting can be the triage operator of local IP access subscriber's local network, local IP access company local network, local IP access the Internet, Internet service, specific IP data distribution.

In implementation process, the PDN establishment of connection method of the present embodiment can may further comprise the steps:

Step 1, terminal need to be obtained PDN from Mobility Management Entity and connect the information of setting up, and terminal connects the information of setting up according to the PDN that obtains, and can connect at local maintenance PDN to set up tabulation.Wherein, PDN connects and to set up information and can include but are not limited to following information: the connection type of the connection that (1) user has set up: existing connection is that the IP shunting connects and/or existing connection is not that the IP shunting connects and/or existing the connection is that core net connects; (2) corresponding relation of APN and connection type: can set up the APN that the IP shunting is connected and/or the APN that can set up the core net connection; (3) network determines that the strategy and/or the IP that set up IP shunting connection shunt connect signatory.For example, it can be (1) and (2) that information is set up in the PDN connection that terminal obtains, perhaps (1) and (3).Behind fast mobile terminal, this PDN connection is set up information and may be lost efficacy, and Mobility Management Entity need to judge whether to resend this information to terminal.

Preferably, terminal receive PDN connect set up information after, can set up, maintenance class connects like PDN as shown in table 1 and set up tabulation.

Table 1

APN1	IP shunts connection	Can set up the IP shunting connects
			APN1	Non-IP shunting connects	Can set up the IP shunting connects
APN1	Non-IP shunting connects	Can set up the IP shunting connects
			APN2	Non-IP shunting connects	Can not set up the IP shunting connects

Behind fast mobile terminal, this PDN connects and sets up tabulation and may lose efficacy, and terminal need to connect according to the PDN of the renewal of Mobility Management Entity indication to be set up information and rebuild this tabulation.

Step 2, when needs are initiated new Business Stream, terminal can connect the information of setting up according to PDN, perhaps PDN connects the foundation tabulation, perhaps PDN connects the information of setting up/PDN and connects collocation strategy/information of setting up tabulation and terminal self, perhaps PDN connects the information of setting up/PDN and connects collocation strategy/information of setting up tabulation, terminal self and be connected ANDSF acquisition strategy/information, carry out PDN and connect to set up and judge, connect in order to determine whether to set up the many PDN of single APN, or Business Stream is carried in the PDN connection of having set up.

For example, tabulation is as shown in table 1 if PDN connects foundation, when terminal initiates to use the new Business Stream of APN1, according to table 1, then terminal does not use APN1 to initiate many PDN connection foundation, connect and new Business Stream is carried on existing IP shunting, at this moment, it is still as shown in table 1 that PDN connects the foundation table.

If it is as described in Table 2 that PDN connect to set up tabulation, when terminal initiated to use the new Business Stream of APN1, according to table 2, terminal can be used APN1 to initiate many PDN to connect and set up, PDN connect set up finish after, PDN connects that to set up tabulation as shown in table 3.

Table 2

APN1	Non-IP shunting connects	Can set up the IP shunting connects
			APN2	Non-IP shunting connects	Can not set up the IP shunting connects

Table 3

APN1	Non-IP shunting connects	Can set up the IP shunting connects
			APN1	IP shunts connection	Can set up the IP shunting connects
APN2	Non-IP shunting connects	Can not set up the IP shunting connects

Preferably, if consider simultaneously the collocation strategy/information of terminal self, if then collocation strategy/the information of terminal self is that APN1 does not allow to set up the many PDN connections of single APN.

When terminal initiates to use the new Business Stream of APN1, according to the collocation strategy/information of table 2 and terminal self, then terminal does not use APN1 to initiate many PDN connection foundation, connects and new Business Stream is carried on existing non-IP shunting, at this moment, it is still as shown in table 2 that PDN connects the foundation table.

Fig. 6 is the schematic diagram according to the wireless communication system IP streamed data of the embodiment of the invention one, and as shown in Figure 6, terminal at first accesses from wireless side network element 1, and uses APN1 to set up IP shunting PDN connection 1, and this connection is take local gateway 1 as anchor point.When fast mobile terminal behind wireless side network element 2 times, former IP shunting PDN connects 1, becomes IP and connects 1, still take local gateway 1 as anchor point, and simultaneously, terminal is used APN1 to rebulid IP shunting connections-IP shunting PDN to connect 2, selection local gateway 2 is new anchor point.

Embodiment two

The present embodiment is applicable to EPS connecting system Routing Area Update flow process, and Mobility Management Entity is set up information with the PDN connection and sent to terminal in this flow process.Fig. 7 is the flow chart according to the tracing section updating of the embodiment of the invention two, and as shown in Figure 7, this flow process can may further comprise the steps:

Step S701 has the IP shunting and connects behind the terminal access to wireless communication system, after this terminal enters Idle state.The zone of fast mobile terminal outside the tabulation of Route Area or tracking area, the reason such as perhaps cycle timer is overtime all can trigger terminal Routing Area Update request message.That is, to give current be the wireless side network element of Terminal Service in the tracing section updating request.

Need to prove, behind fast mobile terminal, this wireless side network element may be different from the wireless side network element that terminal enters before the Idle state.Wherein, terminal send the tracing section updating request to current be the wireless side network element of Terminal Service, the wireless side network element here is referred to as Target Wireless side network element; Terminal enters the wireless side network element before the Idle state, and the wireless side network element here is referred to as former wireless side network element.

Preferably, the wireless side network element be the user selection current service Mobility Management Entity (namely, be referred to as target mobility management entity), and the tracing section updating request is included in initial user message/issue target mobility management entity in the transmission of messages message up and down.The Mobility Management Entity (that is, being referred to as former Mobility Management Entity) that target mobility management entity and terminal enter before the Idle state may be identical.

Step S702, when target mobility management entity and former Mobility Management Entity were not identical, target mobility management entity was initiated to ask up and down to old Mobility Management Entity and is obtained flow process.Here, shunting connects if there is IP in the user, needs to carry the beared information that the IP shunting connects in the message.

Step S703, target mobility management entity may be initiated the authentication flow process to the user.

Step S704, target mobility management entity is that the IP shunting connects selection core net gateway (being target S-GW), and sends the session establishment request to target S-GW.

Step S705, target S-GW initiates the bearer update flow process to local gateway.

Step S706, the target core network gateway sends the session establishment response to target mobility management entity.

Step S707, target mobility management entity is to Authentication Authorization server launch position new technological process more.

Step S708, the Authentication Authorization server is to former Mobility Management Entity launch position deletion flow process.

Step S709, former Mobility Management Entity may initiate the session deletion flow process that core net connects.

Step S710, access control judgement and mobility that the IP shunting connects are judged.In the implementation of step S707, target mobility management entity can obtain user's CAMEL-Subscription-Information.Begin to carry out this step behind target mobility management entity acquisition CAMEL-Subscription-Information, this step may be parallel with step S708, S709.

For example, target mobility management entity is carried out following judgement according to IP shunting is connected: (1) access control is judged: judge whether still can set up in new position the IP shunting and connect according to carrier policy and/or user are signatory etc.; (2) continuity is judged: connect according to carrier policy and/or IP shunting that continuity is signatory judges that whether the IP shunting connects needs support continuity; (3) judge whether optimum local gateway of former local gateway, that is, whether do not exist the local gateway of more close wireless side network element can be Terminal Service.If (1), (2) judge to be to be that then this IP shunting connects and needs to support mobility.

Step S711, target mobility management entity sends Routing Area Update and accepts to terminal, carries PDN in the message and connects the information of setting up.According to the judged result of step S710, if connecting, the IP shunting do not need to support mobility, then continue the Routing Area Update flow process according to prior art, otherwise, carry out this step.If connecting, the IP shunting needs to support mobility, and (3) the determination result is NO among the step S710, and the local gateway that namely has new optimum is Terminal Service, at this moment, the PDN link information that sends before the target mobility management entity lost efficacy, and needed notification terminal to upgrade this information.Perhaps, support mobility as long as the IP shunting connects, no matter whether there is the local gateway of new optimum, target mobility management entity all notification terminal is upgraded this information, and this moment, target mobility management entity can not carried out the judgement of (3).

Preferably, Mobility Management Entity can be set up information band to UE with the PDN connection in NAS message, also can pass to the wireless side network element by S1 message, brings UE by the wireless side network element in RRC message again.

Step S712, after terminal was received the PDN link information, this information of buffer memory, terminal need to safeguard that PDN connects the foundation tabulation, rebuilds/upgrade this tabulation.

Step S713, former Mobility Management Entity initiate carrying to former S-GW and discharge flow process.

Step S714, terminal may be responded Routing Area Update and finish message.

As seen, only described the processing of in the TAU process the original IP of user being shunted in the present embodiment, do not affected the processing that core net connects, the processing that core net connects adopts prior art namely can realize.

Need to prove, (1) although the present embodiment is changed into example with being moved property management entity in the TAU process, but this flow process is equally applicable to not have the TAU flow process of Mobility Management Entity change, at this moment, Mobility Management Entity is receiving that any time after the TAU request can carry out the operation of step S710, S711.(2) the present embodiment is described the flow process that the wireless side network element obtains mobility judgement information and carries out the mobility judgement according to this information in the TAU process as an example of the EPS connecting system example, and the Routing Area Update flow process in the UTRAN/GERAN access also can use the present embodiment to realize obtaining and ambulant judgement of mobility judgement information.(3) when the terminal of connected state switches, after switching flow finishes, terminal can be initiated the TAU process, in this process, after Mobility Management Entity obtains CAMEL-Subscription-Information, also need to carry out such as the described operation of step S710, S711, terminal also can be upgraded PDN according to the indication of network and connect the information of setting up.(4) when the terminal originating service request flow process, if movement has occured terminal, then Mobility Management Entity also needs the described operation of execution in step S710, S711, and terminal also can be upgraded PDN according to the indication of network and connect the information of setting up.

Embodiment three

The present embodiment is applicable to EPS connecting system PDN connection building process, and terminal connects according to PDN setting up tabulates determines whether to set up the many PDN connections of single APN in this flow process, and Mobility Management Entity reselects the P-GW/ local gateway for these many PDN connect.Fig. 8 is the flow chart that connects foundation according to the PDN of the embodiment of the invention three, and as shown in Figure 8, this flow process may further comprise the steps:

Step S801, user have been attached to network, have PDN and connect.When needs are initiated new Business Stream, terminal can connect the information of setting up according to PDN, perhaps PDN connects the foundation tabulation, perhaps PDN connects the information of setting up/PDN and connects collocation strategy/information of setting up tabulation and terminal self, perhaps PDN connects the information of setting up/PDN and connects collocation strategy/information of setting up tabulation, terminal self and be connected ANDSF acquisition strategy/information, carry out PDN and connect to set up and judge, connect in order to determine whether to set up the many PDN of single APN, or Business Stream is carried in the PDN connection of having set up.

Step S802 according to the judgement of step S801, connects if terminal determines to set up the many PDN of single APN, and then terminal transmission PDN connection request carries out PDN connection foundation operation.

Step S803, wireless side network element transmit the PDN connection request to Mobility Management Entity.

Step S804, Mobility Management Entity check whether this APN has set up the PDN connection.If, carry out subsequent step, otherwise, finish PDN according to prior art and connect foundation.

Step S805, whether newly-built PDN is connected to IP shunting connection in the Mobility Management Entity inspection, if then reselect local gateway for this newly-built IP shunting connects.If the local gateway that reselects still is former local gateway, then this IP shunting connection still is anchored on former local gateway.Need to prove, only also can not limit in this step and shunt connection gravity treatment local gateway for this locality, also can connect gravity treatment P-GW by many PDN to all single APN.

Step S806, Mobility Management Entity sends the session establishment request to the core net gateway.In the LTE system, the core net gateway refers to core net S-GW herein.

Step S807, core net gateway are to local gateway initiation session Establishing process, and local gateway creates user's context.

Step S808, the core net gateway sends the session establishment response to Mobility Management Entity.

Step S809, Mobility Management Entity sends carrying to the wireless side network element and sets up request.

Step S810 carries out RRC and connects layoutprocedure.

Step S811, wireless side network element reply the Mobility Management Entity carrying and set up response.

Step S812, terminal sends direct-sending message to the wireless side network element, comprises the PDN connection and finishes message.

Step S813, the wireless side network element sends the PDN connection to Mobility Management Entity and finishes message.

Step S814, Mobility Management Entity is to core net gateway request new bearer more.After finishing the PDN connection building process, terminal is upgraded the PDN connection and is set up information, sets up tabulation if exist PDN to connect, and then upgrades PDN and connects the foundation tabulation.

Preferably, in this implementation process, Mobility Management Entity can be in step S809, S810 connects PDN be set up information and send to terminal, and terminal is upgraded PDN according to the indication of network and connected the information of setting up, PDN and connect and set up tabulation.

As seen, only described IP shunting establishment of connection in the present embodiment, do not affect the core net establishment of connection, and the core net establishment of connection has adopted prior art namely can realize.In addition, the present embodiment describes as an example of the EPS connecting system example, and the PDP context activation flow process in the UTRAN/GERAN access also can be used the method in the present embodiment.

Embodiment three

The present embodiment is applicable to EPS connecting system attachment flow, and in this flow process, Mobility Management Entity connects PDN to be set up information and send to terminal, and terminal is upgraded PDN according to the indication of network and connected the information of setting up, PDN and connect and set up tabulation.The present embodiment is take EPS as example, and the PDP context activation flow process in the UTRAN/E-UTRAN system access also is suitable for the present embodiment.

Fig. 9 is the flow chart that the user according to the embodiment of the invention four adheres to, and as shown in Figure 9, this flow process may further comprise the steps:

Step S901, user need to set up Radio Resource control (Radio Resource Control is referred to as RRC) connection as the carrying of signaling message or business datum before communicating.The user sends initialization Non-Access Stratum (Non-Access-Stratum is referred to as NAS) message attachment request and carries out attach operation.

Step S902, the wireless side network element is issued Mobility Management Entity with initial user message, and transmits Attach Request message to Mobility Management Entity.

Step S903, Mobility Management Entity is opened authentication and safe procedures, and the user is verified.

Step S904, Mobility Management Entity is selected the core net gateway, and sends the session establishment request to the core net gateway.In the LTE system, the core net gateway refers to core net S-GW herein.

Step S905, core net gateway are to local gateway initiation session Establishing process, and local gateway creates user's context.

Step S906, the core net gateway sends the session establishment response to Mobility Management Entity.

Step S907, Mobility Management Entity is initiated initial context foundation to the wireless side network element and is asked/adhere to acceptance.When setting up IP shunting connection, carry PDN in the message and connect the information of setting up.Perhaps, connect no matter which kind of is set up, all in message, carry PDN and connect the information of setting up.

Step S908 carries out RRC and connects layoutprocedure.

Step S909, after terminal was received the PDN link information, this information of buffer memory, terminal need to safeguard that PDN connects the foundation tabulation, rebuilds/upgrade this tabulation.

Step S910, the wireless side network element is replied the Mobility Management Entity initial context and is set up response.

Step S911, terminal sends direct-sending message to the wireless side network element, comprises and adheres to the information of finishing.

Step S912, wireless side network element send to adhere to Mobility Management Entity and finish message.

Step S913, Mobility Management Entity is to core net gateway request new bearer more.

In sum, the embodiment of the invention provides a kind of single many PDN of APN establishment of connection method, that is, use single APN to set up when many PDN connect and select a plurality of P-GW/ local gateways, thereby realize the purpose of the routing optimality of new Business Stream.

Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, carried out by calculation element thereby they can be stored in the storage device, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. a packet data network PDN establishment of connection method is characterized in that, may further comprise the steps:

User terminal UE obtain PDN connect set up information after, if when needing to initiate new Business Stream, use and set up APN APN that PDN connects and initiate PDN and connect and set up operation;

Mobility Management Entity receive the described PDN that initiates from described UE connect set up operation after, reselect gateway for the PDN of this operational correspondence connects, it is one of following that described gateway comprises: grouped data network gateway P-GW, GGSN, local gateway.

2. method according to claim 1 is characterized in that, described Mobility Management Entity reselects described gateway for the PDN of this operational correspondence connects and comprises:

Described Mobility Management Entity is connected at the PDN that determines this operational correspondence in the situation of IP shunting connection, reselects described gateway for this IP shunting connects.

3. method according to claim 1, it is characterized in that, in the flow process of described Mobility Management Entity one of below at least described PDN connected and set up information and send to described UE: tracing section updating flow process, Routing Area Update flow process, service request flow process, PDN connection building process, PDP context activation flow process, attachment flow.

4. method according to claim 1 is characterized in that, described user terminal UE obtains PDN and connects and to set up information and comprise:

Described Mobility Management Entity determines whether that needing to send described PDN connects the information of setting up to described UE;

If, then described Mobility Management Entity is set up information with described PDN connection and is sent to described UE, and described UE preserves the described PDN connection from described Mobility Management Entity that receives and sets up information or connect the PDN connection opening relationships information that the information of setting up is newly-built or preserve renewal this locality according to described PDN.

5. method according to claim 4, it is characterized in that, use set up APN that PDN connects initiate described PDN connect set up operation before, described UE connects opening relationships information according to described PDN and is defined as described new Business Stream and uses and set up APN that PDN connects and set up and be connected with the PDN of this operational correspondence.

6. the method for stating according to claim 4, it is characterized in that, described PDN connects opening relationships information and comprises one of following at least: the local PDN that preserves of described UE connects the information of setting up, PDN and connects the collocation strategy information of setting up tabulation, described UE self, carries out PDN from ANDSF being used for of obtaining and connect and set up the policy information of judging.

7. method according to claim 4 is characterized in that, described Mobility Management Entity determines whether need to send described PDN and connects the information of setting up and comprise to described UE:

Described Mobility Management Entity determines according to user signing contract information and/or carrier policy user's IP shunting connects whether support mobility;

If support, then described Mobility Management Entity sends described PDN connection and sets up information to described UE.

8. method according to claim 7 is characterized in that, described support mobility comprises that described IP shunting connects needs and supports continuity and be connected UE and can set up IP shunting connection in new position.

9. method according to claim 7 is characterized in that, described Mobility Management Entity sends described PDN and connects the information of setting up and comprise to described UE:

Described mobile management entity connects the information of setting up with described PDN and is carried at NAS message and sends to described UE; Perhaps,

Described mobile management entity connects described PDN by S1 or Iu message to be set up information and sends the wireless side network element to, by described wireless side network element described PDN is connected the information of setting up again and is carried at and sends to described UE in the RRC message.

10. method according to claim 1 is characterized in that,

Described PDN connects the information of setting up and comprises one of following at least: the connection type of the built vertical connection of user, APN and corresponding relation, the network of its connection type determine to set up policy information and/or the IP that the IP shunting is connected and shunt the CAMEL-Subscription-Information of connection;

Wherein, the connection type of the built vertical connection of described user is for one of following at least: existing connection is that the IP shunting connects, existing connection is not that the IP shunting connects, the existing connection be the APN that core net connects;

Described APN and the corresponding relation of connection type comprise can set up APN that the IP shunting is connected and/or the APN of core net connection.

11. each described method in 10 is characterized in that according to claim 1, described Mobility Management Entity is one of following: MME, MSC, SGSN.

12. a packet data network PDN establishment of connection system is characterized in that, comprises user terminal UE and Mobility Management Entity, wherein,

Described UE comprises: initiation module, be used for when needs are initiated new Business Stream, and the APN APN that uses built vertical PDN to connect initiates described PDN and connects the foundation operation;

Described Mobility Management Entity comprises: select module, be used for after receiving the PDN connection foundation operation of initiating from described UE, reselect gateway for the PDN of this operational correspondence connects, it is one of following that described gateway comprises: grouped data network gateway P-GW, GGSN, local gateway.

13. system according to claim 12 is characterized in that,

Described Mobility Management Entity also comprises: determination module, be used for according to user signing contract information and/or carrier policy, and determine whether that needing to send PDN connects the information of setting up to described UE;

Described UE also comprises: receiver module, be used in the situation that described determination module determines that needing to send described PDN connects the information of setting up, and the described PDN that receives from described Mobility Management Entity connects the information of setting up; And update module, be used for preserving described PDN connection and set up information or connect the described PDN connection opening relationships information that the information of setting up is newly-built or preserve renewal this locality according to described PDN.

14. system according to claim 13 is characterized in that, described UE also comprises:

Determination module, be used for use set up APN that PDN connects initiate described PDN connect set up operation before, connect opening relationships information according to described PDN and be defined as described new Business Stream and use and set up APN that PDN connects and set up and be connected with the PDN of this operational correspondence.