CN102123387A

CN102123387A - Method, device and system for accessing packet data network

Info

Publication number: CN102123387A
Application number: CN2010100034014A
Authority: CN
Inventors: 赵洁; 刘继兴
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2010-01-11
Filing date: 2010-01-11
Publication date: 2011-07-13

Abstract

The embodiment of the invention discloses a method, device and system for accessing a packet data network, wherein the method comprises the following steps: a packet data serving node (PDSN) receives a request message sent by user equipment (UE), and the request message carries an identification of the packet data network needing to be accessed by the UE; according to the identification of the packet data network, a corresponding PDN Gateway (P-GW) is requested to distribute an IP address to the UE; and a response message sent by the P-GW is received and carries the IP address distributed for the UE by the P-GW. By applying the technical scheme provided by the embodiment of the invention, when the UE is initially positioned at a HRPD (high rate packet data) network or is switched to the HRPD network from an LTE (long term evolution) network, the corresponding P-GW can be found by a PDSN in the HRPD network according to different PDN identifications, and a plurality of PDNs of the UE access the HRPD network simultaneously, so that normal operation of services is guaranteed.

Description

The method of accessing group data network, Apparatus and system

Technical field

The present invention relates to the mobile communication technology field, more particularly, relate to method, the Apparatus and system of accessing group data network.

Background technology

LTE (Long Term Evolution, Long Term Evolution) is 3GPP network UMTS (UniversalMobile Telecommunications System, universal mobile telecommunications system) evolvement network, it improves and has strengthened the aerial access technology of 3G, adopt OFDM (Orthogonal Frequency DivisionMultiplexing, OFDM) and MIMO (Multiple-Input Multiple-Output, multiple-input and multiple-output) as the technology of its wireless network evolution.Improved the performance of Cell Edge User, improved cell capacity and reduce system delay.E-UTRAN in the LTE network (Evolved UniversalTerrestrial Radio Access Network, the Universal Terrestrial Radio Access Network of evolution) is radio open after the evolution, evolution base station eNB (evolved Node B, evolution base station), be responsible for the dynamic assignment of Radio Resource, the modulation of data etc.S-GW (Serving Gateway, gateway) and P-GW (PDNGateway, grouped data network gateway) are the gateways after the evolution, are responsible for carrying foundation and control that network is surveyed.MME is the signaling controlled entity of evolution system, is responsible for functions such as authentication, mobile management.This network support UE (User Equipment, subscriber equipment) sets up a plurality of PDN (Packet DataNetwork, packet data network) simultaneously and connect, promptly can connect with a plurality of P-GW, each PDN connection identifies with an APN (Access Point Name, Access Point Name).

HRPD (High Rate Packet Data, HRPD (high rate packet data)) is a kind of third generation data radio communication system, and the phonetic function of legacy circuit-switched is not provided, and the high data rate bearer service only is provided.The HRPD network is the evolvement network of CDMA2000 1x, wireless access network in this network comprises AN (AccessNetwork, Access Network) and PCF (Packet Control Function, the Packet Control Function entity), wherein AN is equivalent to base station and base station controller, functions such as the modulation of responsible data and switching.PDSN (Packet Data Serving Node, packet data serving node) is a data gateway, is responsible for functions such as data forwarding, authentication and charging.

The intercommunication that much-talked-about topic is 3GPP evolvement network and non-3GPP network that current standardization body is discussed.Wherein of greatest concern is the intercommunication of LTE and HRPD network.In the prior art, can realize the intercommunication of LTE and HRPD network, when UE is positioned at the HRPD network, can pass through the P-GW in the PDSN connection LTE network in the HRPD network, and then realize visit PDN in the LTE network.But, because existing P DSN only sets up corresponding relation with a P-GW, therefore when UE is positioned at the HRPD network, can only be connected to P-GW in the LTE network by the PDSN in the HRPD network, that is to say that UE can only give tacit consent to a PDN who inserts in the LTE network in the HRPD network, cause professional limited; On the other hand, can insert a plurality of PDN simultaneously when UE is positioned at the LTE network, and when UE switched to the HRPD network by the LTE network, the PDN that has only an acquiescence that can keep connected, PDN connection for non-acquiescence all will be interrupted, thereby the continuity of business is impacted.

Summary of the invention

For solving the problems of the technologies described above, the embodiment of the invention provides method, the Apparatus and system of accessing group data network, and to realize that UE inserts a plurality of PDN simultaneously in the HRPD network, technical scheme is as follows:

The embodiment of the invention provides a kind of method of accessing group data network, comprising:

Packet data serving node PDSN receives the request message that user equipment (UE) sends, and in the described request message, carries the sign of the packet data network that UE need insert;

According to the sign of described packet data network, asking corresponding packet data gateway P-GW is described UE distributing IP address;

Receive the response message that described P-GW sends, carrying described P-GW in the described response message is described UE IP address allocated.

The embodiment of the invention provides the method for another kind of accessing group data network, comprising:

User equipment (UE) obtains the address information of the packet data gateway P-GW that described UE need insert from packet data serving node PDSN;

According to the address information of described P-GW, send a request message to corresponding P-GW;

Receive the response message that described P-GW sends, in the described response message, carrying described P-GW is the home address HoA that described UE distributes.

The embodiment of the invention also provides a kind of packet data serving node, comprising:

The request message receiving element is used to receive the request message that user equipment (UE) sends, and in the described request message, carries the sign of the packet data network that UE need insert;

The Address requests unit is used for the sign of the described packet data network that carries according to the request message that the request message receiving element receives, and asking corresponding packet data gateway P-GW is described UE distributing IP address;

The response message receiving element is used to receive the response message that described P-GW sends, and carrying described P-GW in the described response message is described UE IP address allocated.

The embodiment of the invention also provides a kind of user equipment (UE), comprising:

P-GW address information acquiring unit is used for obtaining from packet data serving node PDSN the address information of the packet data gateway P-GW that described UE need insert;

The request message transmitting element is used for the address information of the P-GW that obtains according to P-GW address information acquiring unit, sends a request message to corresponding P-GW;

The response message receiving element is used to receive the response message that described P-GW sends, and in the described response message, carrying described P-GW is the home address HoA that described UE distributes.

Use the technical scheme that the embodiment of the invention provided, when UE initially is positioned at the HRPD network or when the LTE network switches to the HRPD network, can be according to different PDN signs, find corresponding P-GW by the PDSN in the HRPD network, realize that UE inserts a plurality of PDN simultaneously in the HRPD network, guarantee professional normally carrying out.

Description of drawings

Fig. 1 is for realizing the flow chart of the inventive method specific embodiment one;

Fig. 2 is for realizing the flow chart of the inventive method specific embodiment two;

Fig. 3 is for realizing the flow chart of the inventive method specific embodiment three;

Fig. 4 is for realizing the flow chart of the inventive method specific embodiment four;

Fig. 5 is for realizing the flow chart of the inventive method specific embodiment five;

Fig. 6 is for realizing the flow chart of the inventive method specific embodiment six;

Fig. 7 is a kind of structural representation of the packet data serving node of the embodiment of the invention;

Fig. 8 is the another kind of structural representation of the packet data serving node of the embodiment of the invention;

Fig. 9 is a kind of structural representation of the subscriber equipment of the embodiment of the invention;

Figure 10 is the another kind of structural representation of the subscriber equipment of the embodiment of the invention.

Embodiment

Below will be presented in the method for the realization network interworking under the different application sight by embodiment one to embodiment six respectively, the embodiment of the invention mainly is at 3GPP LTE network and non-3GPP HRPD network, realizes the intercommunication of LTE network and HRPD network.

For different UE, the mobile IP capability of its support may be different, below will support the situation of mobile IPv 4, simple IP, mobile IP v 6 respectively at UE, and the technical scheme of the embodiment of the invention is described.

Embodiment one:

In the mobile IP technology, MN (Mobile Node, mobile node) has two kinds of addresses, and a kind of is HoA (Home Address, home address), a kind of CoA (Care-of Address, Care-of Address) that is called.HoA remains unchanged always, therefore when MN moves to field network, still uses this address to keep communication continuity and accessibility.And CoA is distributed to MN by field network, when MN obtains new CoA, binding need be done in this address and HoA on HA (Home Agent, home agent), sets up the tunnel between MN and HA, so that message forwarding.

In the present embodiment, UE initially inserts the HRPD network, supports mobile IPv 4.PDSN transmits mobile IP login request as the P-GW of FA (Foreign Agent, Foreign Agent) in the LTE network of UE, sets up data tunnel with P-GW.P-GW in the LTE network is similar to the HA in the HRPD network, carries out the address binding of HoA and CoA.

Present embodiment provides UE to set up the method that two PDN connect simultaneously according to two different APN, comprises step as shown in Figure 1.Wherein, P-GW1 and P-GW2 are respectively the gateway of two PDN, and the Access Network name of two PDN is respectively APN1 and APN2.

S101:UE and AN consult to eat dishes without rice or wine session, set up and eat dishes without rice or wine to connect.

S102:AN and PDSN are used to transmit signaling and user data for this UE sets up main A10 is connected.

S103:UE and PDSN begin to set up PPP (Point to Point, point-to-point) session.

S104:PDSN carries out authentication process, finish authentication to UE, this step belongs to the part of PPP session, PDSN can be from AAA (authentication authorization andaccounting in this step, authentication, authorize, charge) in the server or obtain APN and the corresponding P-GW address information of UE among the HSS (Home Subscriber Server, home subscriber server).

S105:UE sends mobile IP login request to PDSN.

When UE supports mobile IPv 4, can be by sending mobile IP login request to PDSN, request is set up PDN and is connected.Suppose that the PDN corresponding identification that UE need insert is APN1, in the message body of mobile IP login request message, need to carry APN1 and original parameters needed.Original parameters needed can comprise CoA, NAI (Network Access Identifier network access Identifier), lifetime etc.APN can also can be increased in the existing field, as the part as NAI with the field transmission of new expansion.For example, existing NAI field list is shown: Mike@domainname.com, so APN is increased to the NAI field after, the NAI field can be expressed as Mike@APN.domainname.com, also can be expressed as Mike.APN@domainname.com.

After S106:PDSN receives mobile IP login request message as FA, select corresponding P-GW1 according to APN1, and obtain the address of P-GW1, then PDSN sends to the corresponding P-GW1 of APN1 with mobile IP login request message.

PDSN can be when authentication obtains the address of P-GW1 from AAA or HSS, and address that also can static configuration P-GW1 perhaps according to the domain name of P-GW1, obtains the address of P-GW1 by DNS.

Because PDSN has selected corresponding with it P-GW1 according to the APN1 in the mobile IP login request message that receives, thus PDSN in the message body of the mobile IP login request message that the P-GW1 of APN1 correspondence sends, APN1 is an Optional Field.

After S107:P-GW1 receives mobile IP login request, be UE distribution HoA1, and carry out the address binding operation of mobile IP.P-GW1 sends to PDSN with the mobile IP registration response message, carries the HoA1 that distributes for UE in this message body.At this moment, as setting up data tunnel between the PDSN of FA and the P-GW1.

S108:PDSN is transmitted to UE with the mobile IP registration response message, carries HoA1 in this message body.

PDSN after obtaining the HoA that P-GW is the UE distribution, can preserve the mapping relations between this HoA and the PDN as FA.After PDSN was sent to UE with the HoA that is distributed, UE can insert PDN1 and carry out business.

S109:UE sends another mobile IP login request message to PDSN, carries APN2 in this message body.

To send another mobile IP login request message be to connect in order to set up another PDN to UE in this step.

S110:PDSN selects corresponding P-GW2 according to APN2, obtains the address of P-GW2, and transmits the P-GW2 that mobile IP login request message is given the APN2 correspondence.This step and step S106 are similar.

After S111:P-GW2 receives mobile IP login request, be UE distribution HoA2, and carry out the address binding operation of mobile IP.P-GW2 sends to PDSN with the mobile IP registration response message, carries the HoA2 that is distributed in this message body.At this moment, as setting up data tunnel between the PDSN of FA and the P-GW2.

S112:PDSN receives after the mobile IP registration response message, can check that whether the HoA2 in this message is that HoA1 exists situation about repeating with the IP address of distributing to UE before, if repeat, then re-executes step S110 and S111; If do not repeat, then PDSN preserves the mapping relations that HoA is connected with PDN.Need to prove that this step is an optional step, when having situation about repeating between HoA1 and the HoA2, the concrete reason of repetition situation can take place to the P-GW2 indication in PDSN, also can not indicate.

S113:PDSN transmits the mobile IP registration response message and gives UE, carries HoA2 in this message body.

To step S113, UE connects by two PDN in PDSN in the HRPD network and the LTE network, and this moment, UE can insert PDN1 respectively and PDN2 carries out business.

S114:UE sends upstream data to PDSN.

S115:PDSN checks upstream data, according to the HoA that the upstream data source address was distributed promptly, finds the P-GW of this HoA correspondence.

S116:PDSN is transmitted to corresponding P-GW with data tunnel between the P-GW with upstream data by the PDSN that sets up before, and P-GW is transmitted to upstream data other entities in the network more then.

Present embodiment provides and set up the method that a plurality of PDN connect when UE is positioned at the HRPD network.UE sends and includes the mobile IP login request message of APN field to PDSN, PDSN selects the P-GW corresponding with this APN according to the APN in the message, and obtain the address of P-GW by certain mode, afterwards mobile IP login request message is issued the P-GW of APN correspondence, P-GW receives after the mobile IP login request message, for UE distributes HoA, carry out the address binding operation of mobile IP, the mobile IP registration response message that has carried HoA is sent to PDSN, data tunnel between PDSN and the P-GW is established, and UE can set up PDN by PDSN and connect.Use the present embodiment technical scheme, UE can select to finish a plurality of PDN establishment of connections with the corresponding P-GW of APN when the HRPD network according to different APN, realizes HRPD network insertion LTE server net, and the intercommunication of HRPD network and LTE network.

P-GW1 in the present embodiment and P-GW2 only are used to schematically illustrate, it will be appreciated by those skilled in the art that, UE can connect by a plurality of PDN in PDSN in the HRPD network and the LTE network, and UE can carry out to the step (for example aforesaid S105 and S109) that PDSN sends mobile IP login request simultaneously at different P-GW.

Embodiment two:

Among the embodiment one, introduced when UE supports mobile IPv 4, UE inserts the implementation method of a plurality of PDN.In the present embodiment, will support the situation of simple IP to describe at UE.

In order also to provide the mobile management service, the proxy-mobile IP technology has been proposed on the basis of mobile IP to the terminal of not supporting mobile IP.Main entity has two in the network of proxy-mobile IP, mobile IP agent and HA.Mobile IP agent is a functional entity, and it is usually located on the access entity of portable terminal place wireless network, replaces portable terminal to carry out mobile IP signaling, therefore can provide service for the terminal of not supporting mobile IP.HA is identical with HA function among traditional mobile IP.In MS moved to the scope of certain mobile IP agent, mobile IP agent can replace MS to send mobile IP signaling to HA, sets up data tunnel between mobile IP agent and HA.

At the characteristics of simple IP, present embodiment provides a kind of UE to set up the method that a plurality of PDN connect simultaneously according to different APN when the HRPD network.In the present embodiment, UE initially inserts the HRPD network, supports simple IP.PDSN is as the mobile IP agent of UE, and what receive that UE sends sets up the PDN connection message, selects corresponding P-GW according to the APN in the message, and the P-GW in the LTE network sends the proxy-mobile IP request, sets up data tunnel with P-GW.P-GW in the LTE network is similar to the HA in the HRPD network, carries out the address binding operation of mobile IP.

Present embodiment provides UE to set up the method that two PDN connect simultaneously according to two different APN, comprises step as shown in Figure 2.Wherein, P-GW1 and P-GW2 are respectively the gateway of two PDN, and the APN of two PDN is respectively APN1 and APN2.

S201:UE and AN consult to eat dishes without rice or wine session, set up and eat dishes without rice or wine to connect.

S202:AN and PDSN are used to transmit signaling and user data for this UE sets up main A10 is connected.

S203:UE and PDSN begin to set up the PPP session.

S204:PDSN carries out authentication process, finishes the authentication to UE, and this step belongs to the part of PPP session, and PDSN can obtain relevant APN and corresponding P-GW address information from aaa server or among the HSS in this step.

S205:UE sends to PDSN and sets up PDN connection request message, and the APN of this PDN correspondence is APN1.

UE carries APN1 in the message body of setting up PDN connection request message that PDSN sends.This message can be by the existing ppp protocol of expansion, and as LCP, IPCP message realizes, also can use new message or agreement to finish.

S206:PDSN sends a request message to P-GW1.

After PDSN receives and sets up PDN connection request message, select corresponding with it P-GW1, and the address that obtains P-GW1 according to the APN1 that carries in the message, wherein, the method that PDSN obtains the P-GW1 address with can be described identical with embodiment one.

Support at UE under the situation of simple IP, PDSN can send a request message to P-GW by the proxy-mobile IP request, because PDSN has selected corresponding with it P-GW1 according to the APN1 that sets up in the PDN connection request message that receives, so the APN1 information that PDSN sends in the message body of proxy-mobile IP request message of P-GW1 is Optional Field.The message that this proxy-mobile IP request message can be proxy-mobile IP v4 (PMIP RRQ) also can be the message (PBU) of proxy mobile IPv 6.

S207:P-GW1 receives after the proxy-mobile IP request message, for UE distributes HoA1, carries out the address binding operation of mobile IP, and the proxy-mobile IP response message is sent to PDSN.Data tunnel between PDSN and the P-GW1 is established at this moment.

Carry HoA1 in the message body of the proxy-mobile IP response message that P-GW1 sends, this proxy-mobile IP response message can be proxy-mobile IP v4 response message (PMIP RRP), also can be proxy mobile IPv 6 response message (PBA).

S208:PDSN sends to UE and sets up PDN connection response message, and the HoA1 that PDSN distributes P-GW1 is carried on and sends to UE in the message, and this HoA1 is as the IP address of the simple IP of distributing to UE.

PDSN preserves the mapping relations between this HoA and the PDN.When UE supports simple IP, PDSN carries out mobile IP signaling as mobile IP agent, UE can insert PDN1 by PDSN and carried out business this moment, this PDN connects response message can be by the existing protocol of expansion ppp protocol, as LCP, IPCP message realizes, also can use new message or agreement to finish.

S209:UE sends another and sets up PDN connection request message, carries APN2 in the message.

UE sends another to set up PDN connection request message is to connect in order to set up another PDN in this step.

S210: S206 is similar with step, and PDSN selects corresponding P-GW2 according to APN2, and sends the proxy-mobile IP request message to P-GW2.

S211:P-GW2 sends the proxy-mobile IP response message to PDSN, carries the HoA2 that distributes to UE in this message.Set up the data tunnel between PDSN and the P-GW2 this moment.

S212:PDSN receives after the proxy-mobile IP response message of P-GW2 transmission, check whether the HoA2 in the message exists situation about repeating with the HoA1 that distributes to UE before, if repeat, then re-execute step S210 and S211, request P-GW2 is the UE deallocation; If do not repeat, then PDSN preserves the mapping relations that HoA is connected with PDN.

Be similar to S112, this step also is an optional step.When there was situation about repeating in the HoA2 in the message with the HoA1 that distributes to UE before, PDSN can indicate concrete reason to P-GW2, also can not indicate.

S213:PDSN sends and sets up PDN connection response message to UE, has carried HoA2 in the message, as the IP address of the simple IP of distributing for UE.

To step S213, UE has finished the foundation of two PDN by the PDSN in the HRPD network, and this moment, UE can insert PDN1 respectively and PDN2 carries out business.

S214:UE sends upstream data to PDSN, and the upstream data source IP address is exactly the IP address of distributing to UE before.

S215:PDSN checks upstream data, and (HoA that P-GW distributes) finds corresponding P-GW according to the upstream data source IP address.

S216:PDSN is transmitted to the P-GW that has found with upstream data by the data tunnel between PDSN and the P-GW, and then P-GW is transmitted to this upstream data other entities in the network again.

Present embodiment provides and set up the method that a plurality of PDN connect when UE is positioned at the HRPD network, be that with the difference of embodiment one in the present embodiment, UE supports simple IP, so PDSN can be by the proxy-mobile IP request message for to send a request message to P-GW.In addition, after P-GW was UE distributing IP address, PDSN carried out mobile IP signaling as mobile IP agent, had preserved the IP address and had connected corresponding relation with PDN.

P-GW1 in the present embodiment and P-GW2 only are used to schematically illustrate, it will be appreciated by those skilled in the art that, UE can connect by a plurality of PDN in PDSN in the HRPD network and the LTE network, and UE can carry out to the step (for example aforesaid 205 and 209) that PDSN sends the PDN connection request simultaneously at different P-GW.

Embodiment three:

In the present embodiment, in the time of will supporting mobile IP v 6 at UE, the implementation method that UE inserts a plurality of PDN is introduced.

When UE supports mobile IP v 6, can send the mobile IP v 6 Binding Update to P-GW by UE, receive the mobile IP v 6 binding acknowledgement that P-GW sends.Set up data tunnel between UE and the P-GW, this data tunnel is transparent for PDSN, and PDSN does not need HoA is checked.

Characteristics at mobile IP v 6, present embodiment provides UE can set up the method that a plurality of PDN connect simultaneously according to different APN at the HRPD network, wherein UE initially is arranged in the HRPD network, and P-GW1 and P-GW2 are respectively the gateway of two PDN, and the APN of two PDN is respectively APN1 and APN2.Referring to shown in Figure 3, may further comprise the steps:

S301:UE and AN consult to eat dishes without rice or wine session, set up and eat dishes without rice or wine to connect.

S302:AN is connected for this UE sets up main A10 with PDSN.

S303:UE and PDSN begin to set up the PPP session.

S304:PDSN carries out authentication process, finish authentication to UE, this step belongs to the part of PPP session, and PDSN can obtain relevant APN and corresponding P-GW address information from aaa server or among the HSS in this step, and PDSN distributes the address of a mobile IP v 6 for this UE.This address can be used as the address of simple IP v6, also can be used as the CoA of mobile IP v 6.

S305:UE asks the message of relevant APN1, sends the DHCP information request message to PDSN.

UE can carry the parameter that original needs comprise in APN1 and the message in the message body of the DHCP information request message that PDSN sends, for example NAI etc.APN can also can be increased among existing field such as the NAI with new field transmission.The step S105 of the form of NAI in can reference example one.

After S306:PDSN receives the DHCP information request message, according to the APN1 in the message, search corresponding P-GW1 information, and send DHCP information answer, the address information of carrying P-GW1 in this message body to UE.

S307:UE sends the mobile IP v 6 binding update messages to P-GW1 according to the address information of the P-GW1 that obtains.

UE comprises parameters such as NAI, CoA1 in the message body of the mobile IP v 6 binding update messages that P-GW1 sends.Owing to selected corresponding with it P-GW1 according to the APN1 in the mobile IP registration response message that receives before the UE, the APN1 of UE in the mobile IP v 6 updating message that P-GW1 sends is Optional Field.

S308:P-GW1 receives after the mobile IP v 6 binding update messages, is UE distributing IP v6 address, and promptly HoA1 carries out the binding of HoA1 and CoA1, then sends mobile IP v 6 binding acknowledgement message to UE.Set up data tunnel between P-GW1 and the UE this moment.

P-GW1 sends in the mobile IP v 6 binding acknowledgement message body of UE and carries HoA1.

S309-S312:UE sets up another PDN and connects, and the P-GW of this PDN correspondence is P-GW2, and step and S305-S308 are similar.

Because in mobile IP v 6, data tunnel is between the P-GW that directly is based upon in UE and the LTE network, and is transparent for the PDSN in the HRPD network, so PDSN does not need to carry out and the similar step of S112.

So far, UE has set up two PDN and has connected, and can insert PDN1 respectively and PDN2 carries out business.

S313:UE sends the IP that belongs to PDN1 by the UE that sets up before and the data tunnel between the P-GW1 and wraps to P-GW1, sends to other entities in the network afterwards again.

S314:UE sends the IP that belongs to PDN2 by the UE that sets up before and the data tunnel between the P-GW2 and wraps to P-GW2, then sends to other entities in the network again.

When UE supported mobile IP v 6, the DHCP information request message that the UE transmission includes the APN field was to PDSN, and PDSN selects the P-GW corresponding with this APN according to the APN in the message, and obtains the address of P-GW and inform UE by certain mode.UE sends out IPv6 according to this address and binds more message and newly give P-GW, P-GW receives after the mobile IP v 6 binding update messages, for UE distributes HoA, carry out the address binding operation of HoA and CoA, the mobile IP v 6 binding acknowledgement message of having carried HoA is sent to UE, set up the data tunnel between UE and the P-GW this moment.

P-GW1 in the present embodiment and P-GW2 only are used to schematically illustrate, it will be appreciated by those skilled in the art that, UE can connect with a plurality of P-GW in the LTE network, promptly setting up a plurality of PDN simultaneously connects, and UE can carry out to the step (for example aforementioned S305 and S309) that PDSN sends the DHCP information request simultaneously at different P-GW.

Embodiment one to three supports the situation of mobile IPv 4, simple IP, mobile IP v 6 respectively at UE, when having introduced UE and initially being positioned at the HRPD network, set up a plurality of PDN simultaneously according to different APN and connect.In the time of will introducing UE below and initially be positioned at the LTE network, when the LTE network switches to the HRPD network, how in the HRPD network, to set up the PDN corresponding and connect, and guarantee the continuity of business with LTE.Wherein, embodiment four to six will support the situation of mobile IPv 4, simple IP, mobile IP v 6 to describe at UE respectively.

Embodiment four:

In order to guarantee the continuity of UE business when the LTE network switches to the HRPD network, present embodiment provides UE when the LTE network switches to the HRPD network, sets up the method that a plurality of PDN connect.Wherein, UE supports mobile IPv 4, initially is arranged in the LTE network, and P-GW1 and P-GW2 are respectively the gateways of two PDN, and the APN of two PDN is respectively APN1 and APN2.Referring to shown in Figure 4, may further comprise the steps:

S401:UE finishes the pre-registration based on layer 3 at HRPD, and the switching of HRPD is carried out in decision.

Wherein, pre-registration comprises that the session negotiation of eating dishes without rice or wine, authentication, PPP connect foundation etc.

S402:UE send to connect set up by layer 3 tunnel (IP tunnel) and the routing update request to the simplification AN (AN lite) of HRPD network.

S403: according to the measurement report that carries in the UE message, simplify AN and select UE to wish the AN that connects, and initiate the A16 switching, the session of consulting is before transferred on the target AN.

Wherein, the measurement report that carries in the UE message is prepared to finish before the HRPD network switches at the LTE network.

The data that S404: target AN is established to PDSN connect, and promptly set up main A10 and connect, and target AN is that UE distributes interface-free resources.

S405: simplify AN and obtain the interface-free resources that target AN is the UE distribution, simplify AN and send traffic-channel assignment message to UE, the interface-free resources of distributing is passed to UE according to resulting interface-free resources information by the A16 switching.

S406:UE leaves before the LTE network, sends mobile IP login request message in layer 3 tunnel to PDSN, carries APN in this message.

The APN information that S407:PDSN obtains from AAA/HSS according to the pre-registration process finds corresponding P-GW, and transmits the P-GW of the mobile IP login request message of UE to the APN correspondence.

Because PDSN has selected corresponding with it P-GW1 according to the APN1 in the mobile IP login request message that receives, so the APN in the mobile IP login request message body that PDSN sends is an Optional Field.

S408-S409: similar with S406-S407.S408-S409 connects in order to set up another PDN.When UE had a plurality of PDN simultaneously and connects in the LTE network, S408 can carry out simultaneously with S406.

S410:UE sets up with HRPD and eats dishes without rice or wine to be connected.

S411:AN sends A11 message to PDSN, and indication UE has been connected to the HRPD network, PDSN return response message.

S412:P-GW1 is that UE distributes HoA1, and carries out the address binding operation of mobile IP.P-GW1 sends to PDSN with the mobile IP registration response message, carries the HoA1 that is distributed in this message body.At this moment, set up data tunnel between PDSN and the P-GW1.

S413: after UE inserted the HRPD network, PDSN received the mobile IP registration response message, gave UE with this forwards.Carry HoA1 in this message body.

S414:P-GW2 is that UE distributes HoA2, and carries out the address binding operation of mobile IP.P-GW2 sends to PDSN with the mobile IP registration response message, carries the HoA2 that is distributed in this message body.At this moment, set up data tunnel between PDSN and the P-GW2.This step can be carried out simultaneously with S412.

S415: after UE inserts the HRPD network, PDSN receives the mobile IP registration response message that P-GW2 sends, check that whether the HoA2 in this message is that HoA1 exists situation about repeating with the IP address of distributing to UE before,, then re-execute step S409 and S414 if repeat; If do not repeat, then PDSN preserves the mapping relations that HoA is connected with PDN.

When having situation about repeating between HoA1 and the HoA2, the concrete reason of repetition situation can take place to the P-GW2 indication in PDSN, also can not indicate.

S416:PDSN transmits the mobile IP registration response message and gives UE, carries HoA2 in this message body.

To step S416, UE connects by two PDN in PDSN in the HRPD network and the LTE network.

S417:UE sends upstream data to PDSN.

S418:PDSN checks upstream data, according to the HoA that the upstream data source address was distributed promptly, finds the P-GW of this HoA correspondence.

S419:PDSN is transmitted to corresponding P-GW with data tunnel between the P-GW with upstream data by the PDSN that sets up before, and P-GW is transmitted to upstream data other entities in the network more then.

Present embodiment provides as UE and has supported mobile IPv 4, when the LTE network switches to the HRPD network, sets up the method that a plurality of PDN connect.UE before leaving the LTE network, send include the APN field mobile IP login request message to PDSN, afterwards mobile IP login request message is issued the P-GW of APN correspondence.After UE inserts the HRPD network,, carry out the address binding operation of mobile IP for UE distributes HoA.

Embodiment five:

When present embodiment will be supported simple IP at UE, when UE switched to the HRPD network from the LTE network, the method for setting up a plurality of PDN connections was introduced.Wherein, UE initially is positioned at the LTE network, and P-GW1 and P-GW2 are respectively the gateways of two PDN, and the APN of two PDN is respectively APN1 and APN2.Referring to shown in Figure 5, may further comprise the steps:

S501:UE and HRPD secure network are set up secure tunnel, and AN consults to eat dishes without rice or wine session with simplification.

S502: simplification AN sets up main A10 with PDSN and is connected, and finishes the foundation from simplification AN to the carrying of PDSN at this UE.

S503:UE sets up PPP with PDSN and is connected, and carries out the authentication to UE.

Therefore the S504:UE request sends to PDSN and sets up PDN connection request message at the connection request of APN1, carries APN1 in the message.

The S505:PDSN transmission is set up the PDN connection and is replied to UE.

Because this moment, UE was still at the LTE network, so after PDSN receives the message of setting up the PDN connection request of UE, not directly and corresponding P-GW connect.

S506-S507: similar with S504-S505, the APN in the message is APN2.

S508-S511: similar with S402-S405.

S512:UE switches to HRPD, sets up with HRPD and eats dishes without rice or wine to be connected.

S513:AN sends A11 message to PDSN, and indication UE has been connected to the HRPD network, PDSN return response message.

After S514-S515:UE was connected to the HRPD network, PDSN sent a request message to P-GW1, and P-GW1 is that UE distributes HoA1.

After S516-S518:UE was connected to the HRPD network, PDSN sent a request message to P-GW2, and P-GW2 is that UE distributes HoA2

Wherein, the concrete steps of S514-S515, S516-S518, similar with S206-S207, S210-S212 respectively, no longer repeat specification here.

S519-S521: similar with S214-S216.

Present embodiment provides when UE supports simple IP, when the LTE network switches to the HRPD network, sets up the method that a plurality of PDN connect.Support the difference of mobile IPv 4 to be with UE, PDSN receives that UE sends set up the PDN connection request after, the P-GW in the LTE network does not send the proxy-mobile IP request at once, but after UE switches to the HRPD network, the PDSN just P-GW in the LTE network sends the proxy-mobile IP request, to guarantee that data correctly change the HRPD network over to by the LTE network.

Embodiment six:

In the present embodiment, in the time of will supporting mobile IP v 6 at UE, the implementation method that UE inserts a plurality of PDN is introduced, wherein, UE supports mobile IP v 6, initially is positioned at the LTE network, P-GW1 and P-GW2 are respectively the gateways of two PDN, and the APN of two PDN is respectively APN1 and APN2.Concrete steps are as shown in Figure 6:

S601-S605: similar with S401-S405.

S606:UE switches to the HRPD network, sets up with HRPD and eats dishes without rice or wine to be connected.

S607:AN sends A11 message to PDSN, and indication UE has been connected to the HRPD network, PDSN return response message.

S608-S611: similar with S305-S308, so far UE sets up a PDN connection, and the P-GW of this PDN correspondence is P-GW1.

S612-S615:UE sets up another PDN and connects, and the P-GW of this PDN correspondence is P-GW2, and step and S305-S308 are similar.

S616:UE sends the IP that belongs to PDN1 by the UE that sets up before and the data tunnel between the P-GW1 and wraps to P-GW1, sends to other entities in the network afterwards again.

S617:UE sends the IP that belongs to PDN2 by the UE that sets up before and the data tunnel between the P-GW2 and wraps to P-GW2, then sends to other entities in the network again.

Present embodiment provides when UE support mobile IP v 6, when switching to the HRPD network by the LTE network, sets up the method that a plurality of PDN connect.Compare with embodiment four, UE is after switching to the HRPD network in the present embodiment, and just the DHCP information request message that sends to PDSN obtains the address information of P-GW, and then carries out the operation of mobile IP v 6.

Above embodiment one to six has introduced the method for the accessing group data network of UE under the different application sight respectively, during at LTE network in the prior art and HRPD network interworking, can't realize that a plurality of PDN connect the problem of setting up, in the embodiment of the invention, when UE initially is positioned at the HRPD network or when the LTE network switches to the HRPD network, can be according to different PDN signs, find corresponding P-GW by the PDSN in the HRPD network, realize that UE inserts a plurality of PDN simultaneously in the HRPD network, guarantee professional normally carrying out.

Each embodiment in this specification all adopts the mode of going forward one by one to describe, and identical similar part is mutually referring to getting final product between each embodiment, and each embodiment stresses all is difference with other embodiment.Description by above method embodiment, the those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out all or part of step of the described method of each embodiment of the present invention.And aforesaid storage medium comprises: various media that can be program code stored such as read-only memory (ROM), random-access memory (ram), magnetic disc or CD.

Corresponding to top method embodiment, the embodiment of the invention also provides a kind of packet data serving node, referring to shown in Figure 7, comprising:

Request message receiving element 701 is used to receive the request message that user equipment (UE) sends, and in the described request message, carries the sign of the packet data network that UE need insert;

Address requests unit 702 is used for the sign of the described packet data network that carries according to the request message that the request message receiving element receives, and asking corresponding packet data gateway P-GW is described UE distributing IP address;

Response message receiving element 703 is used to receive the response message that described P-GW sends, and carrying described P-GW in the described response message is described UE IP address allocated.

Use above packet data serving node, UE can set up a plurality of PDN simultaneously with the HRPD network and be connected, and realizes HRPD network insertion LTE server net, realizes the intercommunication of HRPD network and LTE network.

Referring to shown in Figure 8, above-mentioned packet data serving node can also comprise:

Corresponding relation acquiring unit 704 is used for the authentication process at UE, obtains the corresponding relation of APN and P-GW address information from authentication and authorization charging server AAA or home subscriber server HSS.

Address check unit 705, be used for after response message receiving element 703 receives the response message of P-GW transmission, check P-GW is whether the UE IP address allocated repeats for the UE IP address allocated with other P-GW, if then ask P-GW to be UE distributing IP address again.

Mapping relations are preserved unit 706, are used for after described response message receiving element 703 receives the response message that P-GW send, save as the mapping relations that are connected with packet data network of described UE IP address allocated.

When UE supported different agreement, each functional unit difference to some extent on the implementation of concrete function in the packet data serving node below was introduced respectively:

1) when UE supports mobile IPv 4:

Described request message sink unit 701 is used to receive the mobile IP login request message that UE sends, and in the described request message, carries the sign of the packet data network that UE need insert;

Described Address requests unit 702 is used for the described packet data network identification that carries according to the request message that the request message receiving element receives, sends described mobile IP login request message to corresponding P-GW.

Wherein, when UE when Long Term Evolution LTE network switches to HRPD (high rate packet data) HRPD network,

Described request message sink unit 701, being used at the HRPD network is after UE assigns Traffic Channel, to receive the mobile IP login request message that UE sends;

Described Address requests unit 702 is used for after described request message sink unit receives mobile IP login request message, sends described mobile IP login request message to corresponding P-GW;

Described response message receiving element 703 is used for after UE is connected to the HRPD network, receives the response message that described P-GW sends.

2) when UE supports simple IP:

Described request message sink unit 701 is used to receive that UE sends sets up packet data network connection request message, in the described request message, carries the sign of the packet data network that UE need insert;

Described Address requests unit 702 is used for the described packet data network identification that carries according to the request message that the request message receiving element receives, sends the proxy-mobile IP request message to corresponding P-GW.

Described request message sink unit 701 is used for after to the UE authentication, and what receive that UE sends sets up packet data network connection request message;

Described Address requests unit 702 is used for after UE is connected to the HRPD network, and the described packet data network identification that carries in the request message according to the reception of request message receiving element sends the proxy-mobile IP request message to corresponding P-GW.

Use above-mentioned packet data serving node, can be when UE supports mobile IPv 4 or simple IP, when UE initially is positioned at the HRPD network or when the LTE network switches to the HRPD network, according to different PDN signs, find corresponding P-GW by the PDSN in the HRPD network, realize that UE inserts a plurality of PDN simultaneously in the HRPD network, guarantee professional normally carrying out.

Corresponding to top method embodiment, the embodiment of the invention also provides a kind of UE, referring to shown in Figure 9, comprising:

P-GW address information acquiring unit 901 is used for obtaining from packet data serving node PDSN the address information of the packet data gateway P-GW that described UE need insert;

Request message transmitting element 902 is used for the address information of the P-GW that obtains according to P-GW address information acquiring unit, sends a request message to corresponding P-GW;

Response message receiving element 903 is used to receive the response message that described P-GW sends, and in the described response message, carrying described P-GW is the home address HoA that described UE distributes.

Referring to shown in Figure 10, the UE that the invention process provided can also comprise:

Corresponding relation acquiring unit 904 is used for the authentication process at UE, obtains the corresponding relation of APN and P-GW address information from authentication and authorization charging server AAA or home subscriber server HSS.。

When UE supported mobile IP v 6, described P-GW address information acquiring unit 901 can comprise:

The DHCP information request sends subelement, is used for sending the DHCP information request to PDSN, carries the sign of the packet data network that UE need insert in the described DHCP information request;

The DHCP information answer receives subelement, is used to receive the DHCP information answer that PDSN sends, and in the described DHCP information answer, carries the address information with the corresponding packet data gateway P-GW of described packet data network identification.

Described request message sending unit 902 is used for the address information of the P-GW that obtains according to described P-GW address information acquiring unit, sends the mobile IP v 6 binding update messages to corresponding P-GW;

Described response message receiving element 903 is used to receive the mobile IP v 6 binding acknowledgement message that P-GW sends, and in the described mobile IP v 6 binding acknowledgement message, carrying described P-GW is the HoA that described UE distributes.

Described P-GW address information acquiring unit 901 is used for after UE is connected to the HRPD network, obtains the address information of the packet data gateway P-GW that described UE need insert from PDSN.

Use the UE that the embodiment of the invention provided, can be when supporting mobile IP v 6, when UE initially is positioned at the HRPD network or when the LTE network switches to the HRPD network, according to different PDN signs, find corresponding P-GW by the PDSN in the HRPD network, realize that UE inserts a plurality of PDN simultaneously in the HRPD network, guarantee professional normally carrying out.

For device embodiment, because it is substantially corresponding to method embodiment, so relevant part gets final product referring to the part explanation of method embodiment.Device embodiment described above only is schematic, wherein said unit as the separating component explanation can or can not be physically to separate also, the parts that show as the unit can be or can not be physical locations also, promptly can be positioned at a place, perhaps also can be distributed on a plurality of network element.Can select wherein some or all of module to realize the purpose of present embodiment scheme according to the actual needs.Those of ordinary skills promptly can understand and implement under the situation of not paying creative work.

In several embodiment that the application provided, should be understood that disclosed apparatus and method not surpassing in the application's the spirit and scope, can realize in other way.Current embodiment is a kind of exemplary example, should be as restriction, and given particular content should in no way limit the application's purpose.For example, the division of described unit or subelement only is that a kind of logic function is divided, and during actual the realization other dividing mode can be arranged, and for example a plurality of unit or a plurality of subelement combine.In addition, a plurality of unit can or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.

The above only is the specific embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims

1. the method for an accessing group data network is characterized in that, comprising:

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

Being designated of described packet data network: the Access Point Name APN of described packet data network;

Described PDSN obtains APN and the corresponding P-GW address information of this UE from authentication and authorization charging server AAA or home subscriber server HSS in the UE authentication process.

3. method according to claim 1 is characterized in that, after the response message that receives the P-GW transmission, also comprises:

Check that described P-GW is whether described UE IP address allocated is that described UE IP address allocated repeats with other P-GW, if then ask described P-GW to be described UE distributing IP address again.

4. method according to claim 1 is characterized in that, after the response message that receives the P-GW transmission, also comprises:

Save as the mapping relations that described UE IP address allocated is connected with packet data network.

5. according to each described method of claim 1 to 4, it is characterized in that, when described UE supports mobile IPv 4,

The request message that described UE sends is: mobile IP login request message;

The corresponding P-GW of described request is described UE distributing IP address, comprising: described mobile IP request message is forwarded to corresponding packet data gateway P-GW.

6. method according to claim 5 is characterized in that, when UE switches to HRPD (high rate packet data) HRPD network from Long Term Evolution LTE network,

At the HRPD network is that PDSN received the mobile IP login request message that UE sends, and further described mobile IP request message is forwarded to corresponding packet data gateway P-GW after UE assigned Traffic Channel;

After UE was connected to the HRPD network, PDSN received the response message that described P-GW sends, and further the HoA that carries in the described response message is sent to described UE.

7. according to each described method of claim 1 to 4, it is characterized in that, when described UE supports simple IP,

The request message that described UE sends is: set up packet data network PDN connection request message;

The corresponding P-GW of described request is described UE distributing IP address, comprising: send the proxy-mobile IP request message to corresponding P-GW.

8. method according to claim 7 is characterized in that, when UE switches to HRPD (high rate packet data) HRPD network from Long Term Evolution LTE network,

PDSN is after to the UE authentication, and what receive that UE sends sets up packet data network PDN connection request message;

After UE was connected to the HRPD network, PDSN sent the proxy-mobile IP request message to corresponding P-GW.

9. the method for an accessing group data network is characterized in that, comprising:

10. method according to claim 9 is characterized in that,

11., it is characterized in that when described UE supported mobile IP v 6, described UE comprised from the address information that PDSN obtains the packet data gateway P-GW that this UE need insert according to claim 9 or 10 described methods:

UE sends the DHCP information request to PDSN, carries the sign of the packet data network that UE need insert in the described DHCP information request;

Receive the DHCP information answer that PDSN sends, in the described DHCP information answer, carry address information with the corresponding packet data gateway P-GW of described packet data network identification.

12. method according to claim 11 is characterized in that,

Describedly send a request message, comprising: send the mobile IP v 6 binding update messages to corresponding P-GW to corresponding P-GW;

The response message that described reception P-GW sends comprises: receive the mobile IP v 6 binding acknowledgement message that P-GW sends.

13. method according to claim 12 is characterized in that, when UE switches to HRPD (high rate packet data) HRPD network from Long Term Evolution LTE network,

After UE was connected to the HRPD network, UE obtained the address information of the packet data gateway P-GW that described UE need insert from PDSN.

14. a packet data serving node is characterized in that, comprising:

15. packet data serving node according to claim 14 is characterized in that,

Described packet data serving node also comprises: the corresponding relation acquiring unit, be used for authentication process at UE, and from authentication and authorization charging server AAA or home subscriber server HSS, obtain APN and corresponding P-GW address information.

16. packet data serving node according to claim 14 is characterized in that, described packet data serving node also comprises:

The address check unit, be used for after described response message receiving element receives the response message of P-GW transmission, check that described P-GW is whether described UE IP address allocated is that described UE IP address allocated repeats with other P-GW, if then ask described P-GW to be described UE distributing IP address again.

17. packet data serving node according to claim 14 is characterized in that, described packet data serving node also comprises:

Mapping relations are preserved the unit, are used for after described response message receiving element receives the response message that P-GW sends, save as the mapping relations that are connected with packet data network of described UE IP address allocated.

18. according to each described packet data serving node of claim 14 to 17, it is characterized in that, when described UE supports mobile IPv 4,

Described request message sink unit is used to receive the mobile IP login request message that UE sends, and in the described request message, carries the sign of the packet data network that UE need insert;

Described Address requests unit is used for the described packet data network identification that carries according to the request message that the request message receiving element receives, sends described mobile IP login request message to corresponding P-GW.

19. packet data serving node according to claim 18 is characterized in that, when UE switches to HRPD (high rate packet data) HRPD network from Long Term Evolution LTE network,

Described request message sink unit, being used at the HRPD network is after UE assigns Traffic Channel, to receive the mobile IP login request message that UE sends;

Described Address requests unit is used for after described request message sink unit receives mobile IP login request message, sends described mobile IP login request message to corresponding P-GW;

Described response message receiving element is used for after UE is connected to the HRPD network, receives the response message that described P-GW sends.

20. according to each described packet data serving node of claim 14 to 17, it is characterized in that, when described UE supports simple IP,

Described request message sink unit is used to receive that UE sends sets up packet data network connection request message, in the described request message, carries the sign of the packet data network that UE need insert;

Described Address requests unit is used for the described packet data network identification that carries according to the request message that the request message receiving element receives, sends the proxy-mobile IP request message to corresponding P-GW.

21. packet data serving node according to claim 20 is characterized in that, when UE switches to HRPD (high rate packet data) HRPD network from Long Term Evolution LTE network,

Described request message sink unit is used for after to the UE authentication, and what receive that UE sends sets up packet data network connection request message;

Described Address requests unit is used for after UE is connected to the HRPD network, and the described packet data network identification that carries in the request message according to the reception of request message receiving element sends the proxy-mobile IP request message to corresponding P-GW.

22. a user equipment (UE) is characterized in that, comprising:

23. subscriber equipment according to claim 22 is characterized in that,

Described subscriber equipment also comprises: the corresponding relation acquiring unit, be used for authentication process at UE, and from authentication and authorization charging server AAA or home subscriber server HSS, obtain APN and the corresponding P-GW address information of this UE.

24., it is characterized in that when described UE supported mobile IP v 6, described P-GW address information acquiring unit comprised according to claim 22 or 23 described subscriber equipmenies:

25. subscriber equipment according to claim 23 is characterized in that,

The described request message sending unit is used for the address information of the P-GW that obtains according to described P-GW address information acquiring unit, sends the mobile IP v 6 binding update messages to corresponding P-GW;

Described response message receiving element is used to receive the mobile IP v 6 binding acknowledgement message that P-GW sends, and in the described mobile IP v 6 binding acknowledgement message, carrying described P-GW is the HoA that described UE distributes.

26. subscriber equipment according to claim 25 is characterized in that, when UE switches to HRPD (high rate packet data) HRPD network from Long Term Evolution LTE network,

Described P-GW address information acquiring unit is used for after UE is connected to the HRPD network, obtains the address information of the packet data gateway P-GW that described UE need insert from PDSN.