CN1719799A - Method for fusing wireless local area network and 3GPP network - Google Patents

Abstract

This invention relates to a combination method for a WLAN and 3GPP network. When a user accesses a WLAN, it applies an eap-ake standard system band on 802.1 x and takes GGSN as the accessed controller, this time GGSN gets the PDP related to the user WLAN access via the PDP related to the user WLAN access via the PDP context or new PDP context and finishes certification and authorization process by interacting with HLR and ISP Radius server to access, collect and generate the charge information in conformity with 3GPP standard for the user WLAN. It's not necessary for users to use two access ways for signing two account numbers and paying separately, they can use one device to continue 3GPP service at the same time when using WLAN high data rate property.

Description

The fusion method of WLAN and 3GPP net

Technical field

The present invention relates to the fusion method of WLAN (wireless local area network) and 3GPP net in a kind of moving communicating field.

Background technology

With 802.11 wireless local area network technologies for representative can provide the among a small circle business of High Data Rate for the user, the 3gpp net then provides relatively low data rate traffic on a large scale, in addition, wireless local area network technology can only have the access digital network for the business that the user provides, and the business that the 3GPP net can provide for the user is except inserting digital network (referring generally to internet or intranet), supplementary service such as SMS (short message service) and so on can also be provided, for mobile operator, if WLAN and 3GPP net organically can be combined, take full advantage of the extensive covering power of 3GPP network, can guarantee user's continual little deficiency of WLAN coverage that remedies simultaneously connected to the network; Then utilize the high data transmission rate of WLAN to remedy the low shortcoming of 3GPP network data transmission rate at hot zones, can guarantee the unbroken use of user 3GPP business simultaneously.

Also not have at present WLAN and the 3GPP net of the fusion in the operation, but WLAN in the operation and the UNE of GPRS net are arranged, the technology of wherein using can be used as the reference of WLAN and the fusion of 3GPP net.

The scheme of WLAN and GPRS net fusion mainly contains two kinds at present: loose coupling and close coupling.

The Access Network of the Access Network of WLAN and GPRS net is fully independent in the loose coupling scheme, the Access Network of WLAN replenishes as the Access Network of GPRS, only unify at customer data base, the advantage of doing like this is: WLAN and GPRS are separate, and embodiment is comparatively flexible; Need not do big transformation to existing equipment, shortcoming is: be unfavorable for network management and professional fusion: be difficult to the supporting business intercommunication, seamless switching that can't supporting business.

In the close coupling scheme, the Access Network of WLAN is the same with the Access Network of GPRS net, directly inserts the GPRS core net by Gb Interface, will pass through core net from the data of WLAN before arriving the external packet data net.Core net provides service manner and provides service manner the same for WLAN (wireless local area network) inserts for GPRS inserts, WLAN (wireless local area network) realizes closely integrated with GPRS network by adaption function that add to support GPRS at Access Network, and the advantage of doing like this is: can multiplexing GPRS network resource; Easier realization is chargeed and the unification that authenticates; Can realize business intercommunication; Can realize professional seamless switching, the shortcoming of doing like this is: the implementation cost of WLAN (wireless local area network) improves, and the flexibility of enforcement descends; Technical difficulty is bigger; Also influential to the GPRS core net.

Goal of the invention

The object of the present invention is to provide the fusion method of a kind of WLAN and 3GPP network, use this method can realize by existing WLAN devices authentication and the charging unification of two kinds of networks, business is shared and is kept successional business to switch.

Technical scheme:

The WLAN (wireless local area network) that the present invention proposes and the fusion method of 3GPP network may further comprise the steps:

a。The user adopts the eap-aka mechanism based on 802.1x of standard, take GGSN as access controller when accessing WLAN; This moment, GGSN obtained inserting relevant PDP Context with user's WLAN by multiplexing existing PDP Context or newly-built PDP Context; GGSN finishes the authentication and authorization process alternately by the Radius server with HLR and ISP, and after authentication and authorization was passed through, GGSN inserted collection and generates the charge information that meets the 3GPP standard for user's WLAN: GCDR and Radius charge information;

b。Subscriber equipment shows the coverage condition of 3GPP network and WLAN to the user: only be under the 3GPP network coverage, only be in WLAN and cover lower or be in simultaneously the 3GPP network and WLAN covers lower; The interface that the user provides by subscriber equipment is selected: only by WLAN, and 3GPP network or simultaneously by two kinds of network insertion outer data networks only;

c。When the user deactivates in any network, notified this kind deactivation of GGSN meeting, and relevant route and the PDP Context information of change.

Beneficial effect:

The invention has the beneficial effects as follows:

a。The user needn't be for using two kinds of access waies contract two account numbers and defrayment respectively.

b。The user can not interrupted by an equipment business of 3GPP network in the high-data rate feature of using WLAN.

C。Can keep certain business continuance when switching between two nets.

D. compatible with the logical architecture of existing network basically.

Description of drawings:

Fig. 1 is a network structure of the present invention.

Fig. 2 is the connection status figure of subscriber equipment and two kinds of networks.

Fig. 3 is the authentication when inserting by WLAN (wireless local area network) and the flow chart of address assignment.

Fig. 4 is from only being activated to simultaneously flow path switch figure based on WLAN (wireless local area network) and 3GPP network activation based on WLAN.

Fig. 5 is collection and the transmission flow figure of charge information.

Concrete embodiment:

Embodiments of the invention such as Fig. 1 are to shown in Figure 5

The connection of each node of representing among Fig. 1 can exist simultaneously.

Fig. 2 is the state machine diagram of PDP Context in the subscriber equipment, wherein un-activation and only be the 3GPP process of standard based on the state exchange between the 3GPP network activation.

Situation about inserting from WLAN (wireless local area network) as the user comprises the process that two states is changed, the first only never is activated to and activates based on WLAN (wireless local area network), it two is from only being activated to simultaneously based on WLAN (wireless local area network) and 3GPP network activation based on the 3GPP net, and the both needs authentication and authorization (Fig. 3).

Concrete process is as follows:

1. subscriber equipment sends the beginning authentication message to GGSN (being the Access Control unit in the WLAN).

2.GGSN obtain user's IMSI, APN and PDPADDR information by the NAI attribute in the EAP mechanism.

3.GGSN pass through IMSI, the PDP Context tabulation that APN and PDPADDR search have activated, if do not find corresponding PDP Context, then can be judged as the PDP un-activation, carry out and never be activated to the conversion that only activates based on WLAN, for this reason the user this time insert a newly-built PDP Context, state is un-activation; If found would carry out from based on the 3GPP network activation to simultaneously based on the conversion of WLAN and 3GPP network activation, multiplexing this PDP Context.Below 4,5, be the common step of two kinds of conversions, 7 only to from based on the 3GPP network activation to simultaneously effective based on the conversion of WLAN and 3GPP network activation, 8,9 only to from unactivated state to only effective based on the conversion of WLAN state of activation.

Obtain user's authentication five-tuple 4.GGSN utilize IMSI information to call MAP stack function from HLR, this five-tuple is that the 3GPP network authenticates the standard mode of (being AKA mechanism) to the user who possesses the USIM function.

Call MAP stack function obtains the user from HLR CAMEL-Subscription-Information 5.GGSN utilize IMSI information, utilize CAMEL-Subscription-Information to judge whether this user can be inserted by WLAN (wireless local area network), if could would carry out following steps, as cannot then interrupting verification process, and discharge related resource.

6.GGSN and between the user by finishing mutual authentication and key generative process based on the AKA mechanism of EAP.

7. if be that the PDP Context of multiplexing previous activation then PDP state are transformed into based on WLAN and 3GPP network activation in the front 3, subscriber equipment can be be simultaneously received and dispatched the protocol Data Unit relevant with this PDP in 3GPP network and WLAN.

If nontransparent access outer data network then GGSN will start the radius/diameter verification process, if authentication by may with to the distributing IP address to the user.

9. if the distributing IP address is not to the user in 6, then subscriber equipment can be initiated a dhcp process and be obtained the IP address.After the success of this process, this PDP Context only enters based on the WLAN state of activation, and subscriber equipment can be received and dispatched the protocol Data Unit relevant with this PDP in WLAN.

From only be connected to WLAN to simultaneously with the state flow path switch (Fig. 4) of WLAN and 3GPP network connection: when PDP Context from only being activated to simultaneously when changing based on WLAN and 3GPP network activation based on WLAN, two kinds of situations of activation that the activation that subscriber equipment starts and network side require, the activation step that subscriber equipment starts is (Fig. 4):

1. the activation among the 3GPP of operative norm is at first sent out the PDP Context request of creating up to SGSN to GGSN.

2. be not empty such as PDPADDR, the APN of GGSN by receiving then, the PDP Context table is only activated based on WLAN in MSISDN and PDPADDR search this locality, if existing corresponding PDP Context, multiplexing this PDP Context then, and beam back accordingly and create the PDP Context response.After finishing, the activation process of this PDP Context in the 3GPP network enter simultaneously based on WLAN and 3GPP net state of activation.

GGSN timing acquiring user's flow and online hours information, when must sending G-CDR, also should under the situation of nontransparent access, report charging message (Fig. 5) to AAA Server by radius/diameter mechanism to the charging gateway (CGF) of 3GPP.

Claims (1)

1, the fusion method of WLAN (wireless local area network) and 3GPP network is characterized in that may further comprise the steps:

a。The user adopts the eap-aka mechanism based on 802.1x of standard, take GGSN as access controller when accessing WLAN; This moment, GGSN obtained inserting relevant PDP Context with user's WLAN by multiplexing existing PDP Context or newly-built PDP Context; GGSN finishes the authentication and authorization process alternately by the Radius server with HLR and ISP, and after authentication and authorization was passed through, GGSN inserted collection and generates the charge information that meets the 3GPP standard for user's WLAN: GCDR and Radius charge information;

b。Subscriber equipment shows the coverage condition of 3GPP network and WLAN to the user: only be under the 3GPP network coverage, only be in WLAN and cover lower or be in simultaneously the 3GPP network and WLAN covers lower; The interface that the user provides by subscriber equipment is selected: only by WLAN, and 3GPP network or simultaneously by two kinds of network insertion outer data networks only;

c。When the user deactivates in any network, notified this kind deactivation of GGSN meeting, and relevant route and the PDP Context information of change.

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