CN102740401A - Method and system for accessing to mobile core network through trusted fixed network - Google Patents
Method and system for accessing to mobile core network through trusted fixed network Download PDFInfo
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- CN102740401A CN102740401A CN2011100358821A CN201110035882A CN102740401A CN 102740401 A CN102740401 A CN 102740401A CN 2011100358821 A CN2011100358821 A CN 2011100358821A CN 201110035882 A CN201110035882 A CN 201110035882A CN 102740401 A CN102740401 A CN 102740401A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W8/26—Network addressing or numbering for mobility support
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Abstract
The invention discloses a method and a system for accessing to a mobile core network through a trusted fixed network. The method and the system are used to solve a technical problem that user equipment (UE) can not access business provided by a mobile operator caused by the fact that the UE can not trigger the mobile core network to assign IP addresses for the UE. In the method, after interaction of existing messages between the mobile UE and the fixed network, a routing gateway (RG) sends messages to broadband network gateway/broadband remote access server (BNG/BRAS), to trigger the message interaction between the fixed network and the mobile core network and request the mobile core network to assign IP addresses for the UE. And then the RG obtains the IP addresses, and provides the IP addresses to the UE after corresponding processing of IP address mapping relationships. The UE using the IP addresses provided by the RG accesses the business through the mobile network or directly through the fixed network. The method and the system enhance the messages between the UE and network elements of the fixed network (including the RG and the BNG/BRAS), so that the UE can access the mobile core network through a trusted WLAN network and access the business provided by the mobile network.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of portable terminal through fixed network access mobile core network trusty, the method and system of the business that visit mobile operator or fixed network operator provide.
Background technology
Third generation partner program (3rd Generation Partnership Project; The grouping system of evolution 3GPP) (Evolved Packet System; EPS) by Universal Terrestrial Radio Access Network (the Evolved Universal Terrestrial Radio Access Network of evolution; E-UTRAN), mobile management unit (Mobility Management Entity, MME), gateway (Serving Gateway, S-GW), grouped data network gateway (Packet Data Network Gateway; P-GW) and home subscriber server (Home Subscriber Server HSS) forms.
EPS supports the intercommunication with non-3 GPP system, wherein, passes through the S2a/b/c interface with the intercommunication of non-3 GPP system and realizes that P-GW is as the anchor point between 3GPP and non-3 GPP system.In the system architecture diagram of EPS, non-3 GPP system inserts and is divided into trustless non-3GPP access and the non-3GPP access of trusted; Wherein, (Evolved Packet Data Gateway's packet data gateway of trustless non-3GPP access need process evolution ePDG) links to each other with P-GW, and the interface between ePDG and P-GW is S2b; The non-3GPP of trusted inserts and can directly be connected with P-GW through the S2a interface, and the S2a interface adopts the PMIP agreement to carry out information interaction; In addition; The S2c interface provides subscriber equipment (User Equipment; UE) with P-GW between relevant control and the mobility support of user plane; The mobility management protocol of its support is that (Moblie IPv6 Support for Dual Stack Hosts and Routers, DSMIPv6), it can be used for trustless non-3GPP and the non-3GPP of trusted inserts for the mobile IP v 6 of supporting two stacks.
Wlan network can be used as the non-3GPP of trusted and inserts EPS.Because wlan network itself has two kinds of networking models; Comprise routing gateway or home gateway (Routing Gateway or Residential Gateway; RG), RG is that bridge mode and RG are route pattern, so; When WLAN and EPS intercommunication, need consider the specification requirement of different networking models and EPS intercommunication respectively.
Wherein, when RG is bridge mode, during UE visit fixed network services; Fixed network distributes local IP for it; And (Broadband Network Gateway/Broadband Remote Access Server BNG/BRAS) initiates proxy-mobile IP (Proxy Mobile IP, PMIP) tunnel foundation to mobile core network can to trigger broadband gateway/broadband remote access servers; These needs BNG/BRAS supports the PMIP agreement, and can return to the terminal to the mobile network for the address of terminal distribution.
And RG is when being route pattern (like Fig. 1, shown in 2), and during UE visit fixed network services, the concrete steps of flow process are: at first; BNG/BRAS is that RG distributes local IP (such as the ustomer premises access equipment address, Customer Premises Equipment IP is called for short CPE IP); RG is as Dynamic Host Configuration Protocol server (Dynamic Host Configuration Protocol Server then; DHCP Server), through dhcp message, for UE distributes an IP address (being generally privately owned address); UE obtains after this IP address, promptly can be through BNG/BRAS visit fixed network services; But; If UE is through wlan network access mobile core network; The existing message mechanism (as shown in Figure 2) of route pattern can't trigger BNG/BRAS and send PMIP message through the S2a interface to mobile core network, to obtain the IP address that it is a terminal distribution from mobile core network; And adopt this IP address, visit the business that mobile operator provides.
Summary of the invention
In view of this; Main purpose of the present invention is to provide a kind of method and system through fixed network access mobile core network trusty; When being used to solve fixed network as non-3GPP network trusty; Existing message mechanism UE can't trigger core net and be its distributing IP address, causes UE can't visit the technical problem of the business that mobile operator provides.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of UE is through the method for fixed network access mobile core network trusty; This method is applied to mobile subscriber terminal (UE) through trusting fixed network access mobile core network; And the home gateway in the fixed network (RG) is in the scene of route pattern, and after mobile UE inserted RG, RG sent message to broadband gateway (BNG)/broadband remote access servers (BRAS); Trigger the interacting message between fixed network and the mobile core network, the request mobile core network is this UE distributing IP address;
It is said mobile UE IP address allocated that RG obtains mobile core network, and carries out after the processing of corresponding IP address mapping relations the IP address being offered said mobile UE;
The IP address that said mobile UE adopts RG to provide is through the mobile network or directly through the fixed network access service.
Further, said " RG sends message to BNG/BRAS " before, also comprise:
Carry out point-to-point protocol LCP (PPP LCP) between said mobile UE and the RG and consult, and accomplish point-to-point protocol expansion authentication protocol (PPP EAP) identifying procedure, and carry out point-to-point IP control protocol (PPP IPCP) and consult.
Further; If said mobile UE supports two IP address coexistences; Then between said mobile UE and RG, carrying out PPP LCP consults also to comprise before: said mobile UE sends DHCP (DHCP) message to RG; After said mobile UE and RG completion DHCP negotiation, RG is that said mobile UE distributes an address; If said mobile UE only supports an IP address, then said mobile UE directly and carry out PPP LCP between the RG and consult.
Further, said RG judges according to the user totem information that carries in expansion authentication protocol (EAP) authentication message whether current be to move UE to insert.
Further; Said RG is for triggering the interacting message between fixed network and the mobile core network; To the message that BNG/BRAS sent is dhcp message or proxy-mobile IP (PMIP) message, comprises international mobile subscriber identity (IMSI) and APN (APN) information in said dhcp message or the PMIP message.
After BNG/BRAS receives the dhcp message or PMIP message that said RG sends, send PMIP message and give grouped data network gateway (P-GW), to accomplish the flow process relevant with the mobile network; The said flow process relevant with the mobile network comprises: foundation of PMIP tunnel and IP address assignment, IP-CAN session are set up and P-GW identification renewal flow process.
Further, to obtain mobile core network be said mobile UE IP address allocated for the dhcp message that sends through BNG of said RG or PMIP message.
Further, network is that said mobile UE distributes two IP addresses or an IP address; Said two IP addresses comprise that fixed network is that UE IP address allocated and mobile network are the UE IP address allocated; Said IP address mapping relation is that fixed network is that UE IP address allocated and mobile network are the mapping relations between its IP address allocated.
The IP address that said mobile UE adopts RG to provide, the data message is carried out corresponding encapsulation process comprise:
Preserving two IP addresses or preserve a mobile core network at said mobile UE is its IP address allocated, and needs through under the situation of mobile network's access service, and said mobile UE is that message packaged source address is that mobile core network is its IP address allocated;
When fixed network of said mobile UE preservation was its IP address allocated, said mobile UE was that message packaged source address is that fixed network is its IP address allocated.
Said mobile UE need be through in the process of mobile network's access service, and said RG carries out the map addresses processing to the data message and comprises according to the IP address mapping relation of this locality:
Preserve two IP addresses or preserve a mobile core network at said mobile UE and be its IP address allocated, and when needing through mobile network's access service, RG is responsible for message and transmits;
When fixed network of said mobile UE preservation is its IP address allocated; RG is according to the IP address mapping relation; With fixed network in the heading is that to change to mobile core network be said mobile UE IP address allocated to said mobile UE IP address allocated; With through mobile network's access service, perhaps carry out corresponding tactful route based on service feature.
Based on said method, the present invention also proposes a kind of system through fixed network access mobile core network trusty, and this system comprises:
Address acquisition module is used between UE, RG, BNG/BRAS and mobile core network, carrying out interacting message, to obtain mobile core network for moving the UE IP address allocated; In this module, RG sends message to BNG/BRAS, triggers the interacting message between fixed network and the mobile core network, and asking and obtaining mobile core network is to move UE distributing IP address;
Address processing module is used for after RG acquisition mobile core network is the UE IP address allocated, carries out the corresponding IP address mapping relations and handling, and the IP address is offered UE;
The Operational Visit module is used for the IP address that UE adopts RG to provide, through the mobile network or directly through the fixed network access service.
Further, this system also comprises:
The ppp negotiation module; Be used at RG before BNG/BRAS sends message; Carrying out point-to-point protocol LCP (PPP LCP) between said mobile UE and the RG consults; And accomplish point-to-point protocol expansion authentication protocol (PPP EAP) identifying procedure, and carry out point-to-point IP control protocol (PPP IPCP) and consult.
(comprising: RG, the message between BNG) strengthens, and guarantees that UE can pass through wlan network access mobile core network trusty, and visits the business that the mobile network provides to UE and fixed network network element in the present invention.
Description of drawings
Fig. 1 is the Organization Chart of UE through non-3GPP network insertion mobile core network trusty;
Fig. 2 is the flow chart of UE through non-3GPP network insertion mobile core network trusty;
Fig. 3 is the scheme one of UE of the present invention through non-3GPP network insertion mobile core network trusty;
Fig. 4 is the scheme two of UE of the present invention through non-3GPP network insertion mobile core network trusty;
Fig. 5 is the scheme three of UE of the present invention through non-3GPP network insertion mobile core network trusty;
Fig. 6 is the scheme four of UE of the present invention through non-3GPP network insertion mobile core network trusty.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below lift embodiment and with reference to accompanying drawing, to further explain of the present invention.
This flow process is that RG is under the route pattern, and WLAN is as non 3GPP network trusty.Mobile terminal UE is through S2a interface access mobile core net.Wherein, fixed network and mobile network are respectively UE and distribute an IP address, in UE, preserve two IP addresses.Adopt the DHCP agreement between RG and the BNG/BRAS, solve and to transmit the problem of mobile network between RG and the BNG/BRAS for the terminal UE IP address allocated.As shown in Figure 3, comprising:
(in the ppp negotiation process, BNG/BRAS is that RG distributes local ip address, i.e. CPE IP for Point to Point Protocol, PPP) negotiation and verification process to carry out peer-peer protocol between step 301:RG and the BNG/BRAS.
Carry out the DHCP negotiations process between step 302:UE and the RG, in the DHCP negotiations process, RG is that UE distributes an IP address, is generally private network IP, is called IP2.
Step 303: if this UE is a portable terminal, promptly move UE, then and carry out ppp link control protocol (PPP Link Control Protocol, PPP LCP) between the RG and consult.
After step 304:RG receives the PPP LCP request message of UE; As the authenticator, can initiate authentication protocol (Extensible Authentication Protocol, the EAP) authentication request message of PPP expansion to UE; Thereby accomplish UE to the 3GPP certificate server (such as: authorize; Authentication and accounting server, Authorization Authentication and Accounting Server, AAA Server) the EAP identifying procedure.In the EAP identifying procedure, it is mobile phone users that RG can discern this UE.
Step 305:BNG/BRAS receives after the EAP authentication request message; Can initiate and broadband policy controlled function (Broadband Policy Control Function; The foundation of the fixed network strategy session BPCF); BPCF and then can trigger and strategy and charging rule functions (Policy and Charging Rules Function, the foundation of the strategy session between PCRF); Through the strategy session of setting up, can the unified coordination and administration Policies Resource between mobile network and the fixed network.
Step 306: after accomplishing the EAP authentication, UE initiates point-to-point IP control protocol (PPP IP Control Protocol, PPP IPCP) request message to RG.
Step 307:RG receives after the PPP IPCP request message; Judgement based on step 304; If this UE is a mobile phone users, then local structure DHCP discover message comprises in this message: APN (Access Point Name; APN), international mobile subscriber identity (International Mobile Subscriber Identification Number, the information that IMSI) waits the mobile network to need.
Step 308:BNG/BRAS receives after the dhcp discover message that (Proxy Binding Update, PBU) message comprises in this message: APN, information such as IMSI are to ask IP address assignment to P-GW can to initiate agent binding update to P-GW.
Step 309:P-GW receives after the PBU message, carries out IP connected reference network (IP-Connectivity Access Network, IP-CAN) foundation of session between meeting and the PCRF.
Step 310:, then carry out the renewal of P-GW sign to HSS if P-GW changes.
Step 311:P-GW receives after the PBU message, can reply agent binding to BNG/BRAS and confirm that (Proxy Binding Acknowledgement, PBA) message are carried the IP address into terminal distribution in this message, be called IP1.
Step 312-313:BNG/BRAS receives and from message, obtains after the IP1 after the PBA message, fills out during DHCP gives information, and replies to RG.RG obtains IP1 after receiving that DHCP gives information, and sends DHCP request/dhcp response message with the BNG/BRAS that replys response, confirms the IP1 that is assigned with.
Step 314:RG receives after the dhcp response message, can send PPP IPCP negative acknowledgment message to UE, and this message is carried the IP1 address and given UE.
Alternatively, RG receives after the dhcp response message, obtains after the IP1, can locally distribute an IP address, is called IP3, and local mapping relations of preserving IP1 and IP3; Send the PPPIPCP negative acknowledgment message to UE then, this message is carried the IP3 address and is given UE.
Step 314a:UE receives and replys through PPPIPCP request/PPP IPCP between meeting and the RG after the PPP IPCP negative acknowledgment message, with IP1 or IP3 address (IP that specifically carries with the PPPIPCP negative acknowledgment message is as the criterion of confirming to RG to distribute).
Step 315: if the updating strategy of needs is arranged, then PCRF can trigger and can carry out the policy update operation between itself and BPCF, BNG/BRAS and the BPCF.
Step 316:UE can carry out transfer of data according to from the distributing strategy that network side/this locality configuration is obtained, and concrete operations are following:
A) streamed data (seeing step 316a): when UE judged that this business datum need be shunted, then UE can fill out the IP source address of service message and be that IP2, destination address are the real purpose address of message; When this message sent to RG, RG can change the IP source address of this message into CPE IP, and sends to BNG/BRAS; BNG/BRAS receives after the message, promptly through outside IP network, sends message to real destination.
The data (seeing step 316b) of B) visiting from the mobile network: need visit through the mobile network when UE judges this business datum, then UE can fill out the IP source address of this service message and be that IP1, destination address are the real purpose address of message; RG, BNG/BRAS and mobile network's equipment all carries out routing forwarding to data and gets final product.
Alternatively, if UE obtains is IP3, then UE can fill out the IP source address of this service message and be that IP3, destination address are the real purpose address of message; RG is after receiving this message, and according to the IP1 of this locality preservation and the mapping table of IP3, the IP source address of revising message is IP1, carries out routing forwarding then.
The encapsulation mechanism of uplink message below only is described, the purpose IP map addresses operation that the encapsulation mechanism of downlink message carries out in the heading gets final product, and does not specify at this.
In addition, between BNG/BRAS and P-GW except adopting the PMIP agreement, can also adopt GPRS Tunnel Protocol (GPRS Tunnelling Protocol, GTP); If adopt the GTP agreement, then PBU message is corresponding changes the establishment conversation request message into, and conversational response message is created in changing into that PBA message is corresponding.
Explain:
1) there is not sequencing between the step 309-311.
2) step 315 can take place any time after step 305.
Embodiment 2
This flow process is that RG is under the route pattern, and WLAN is as non 3GPP network trusty.Mobile terminal UE is through S2a interface access mobile core net.Wherein, fixed network and mobile network are respectively UE and distribute an IP address, in UE, preserve two IP addresses.And the difference of embodiment 1 is: adopt the PMIP agreement between RG and the BNG/BRAS, solve and can't transmit the problem of mobile network for the terminal UE IP address allocated between RG and the BNG/BRAS.As shown in Figure 4, comprising:
Carry out ppp negotiation and verification process between step 401:RG and the BNG/BRAS, in the ppp negotiation process, BNG/BRAS is that RG distributes local ip address, i.e. CPE IP.
Carry out the DHCP negotiations process between step 402:UE and the RG, in the DHCP negotiations process, RG is that UE distributes an IP address, is generally private network IP, is called IP2.
Step 403:, then carry out PPP LCP between UE and the RG and consult if this UE is a portable terminal.
After step 404:RG receives the PPP LCP request message of UE,, can initiate PPP EAP authentication request message to UE as the authenticator; In the EAP identifying procedure, it is mobile phone users that RG can discern this UE, accomplish UE to the 3GPP certificate server (such as EAP identifying procedure AAA Server).
Step 405:BNG/BRAS receives after the EAP authentication request message, can initiate and BPCF between the foundation of fixed network strategy session, BPCF so can trigger and PCRF between the foundation of strategy session; Through the strategy session of setting up, can the unified coordination and administration Policies Resource between mobile network and the fixed network.
Step 406: after accomplishing the EAP authentication, UE initiates PPP IPCP request message to RG.
Step 407:RG receives after the PPP IPCP request message that based on the judgement of step 404, if this UE is a mobile phone users, then local structure PBU message comprises in this message: the information of mobile network's needs such as APN, IMSI.
BNG/BRAS receives after the PBU message, can transmit PBU message to P-GW, comprises in this message: APN, information such as IMSI are to ask IP address assignment to P-GW.
Step 408:P-GW receives after the PBU message, carries out the foundation of IP-CAN session between meeting and the PCRF, and can reply PBA message to BNG/BRAS, carries the IP address into terminal distribution in this message, is called IP1.
Step 409:, then carry out the renewal of P-GW sign to HSS if P-GW changes.
Step 410:BNG/BRAS transmits PBA message and gives RG.
Step 411:RG receives after the PBA message, can send PPP IPCP negative acknowledgment message to UE, and this message is carried the IP1 address and given UE.
Alternatively, RG receives after the PBA message, obtains after the IP1, can locally distribute an IP address, is called IP3, and local mapping relations of preserving IP1 and IP3; Send PPP IPCP negative acknowledgment message to UE then, this message is carried the IP3 address and is given UE.
Step 411a:UE receives and replys through PPPIPCP request/PPP IPCP between meeting and the RG after the PPP IPCP negative acknowledgment message, with IP1 or IP3 address (IP that specifically carries with the PPPIPCP negative acknowledgment message is as the criterion of confirming to RG to distribute).
Step 412: if the updating strategy of needs is arranged, then PCRF can trigger and can carry out the policy update operation between itself and BPCF, BNG/BRAS and the BPCF.
Step 413:UE can carry out transfer of data according to from the distributing strategy that network side/this locality configuration is obtained, and concrete operations are following:
A) streamed data (seeing step 413a): when UE judged that this business datum need be shunted, then UE can fill out the IP source address of service message and be that IP2, destination address are the real purpose address of message; When this message sent to RG, RG can change the IP source address of this message into CPE IP, and sends to BNG/BRAS; BNG/BRAS receives after the message, promptly through outside IP network, sends message to real destination.
The data (seeing step 413b) of B) visiting from the mobile network: need visit through the mobile network when UE judges this business datum, then UE can fill out the IP source address of this service message and be that IP1, destination address are the real purpose address of message; RG, BNG/BRAS and mobile network's equipment all carries out routing forwarding to data and gets final product.
Alternatively, if UE obtains is IP3, then UE can fill out the IP source address of this service message and be that IP3, destination address are the real purpose address of message; RG is after receiving this message, and according to the IP1 of this locality preservation and the mapping table of IP3, the IP source address of revising message is IP1, carries out routing forwarding then.
The encapsulation mechanism of uplink message below only is described, the purpose IP map addresses operation that the encapsulation mechanism of downlink message carries out in the heading gets final product, and does not specify at this.
In addition, between BNG/BRAS and P-GW,, can also adopt the GTP agreement except adopting the PMIP agreement; If adopt the GTP agreement, then PBU message changes the establishment conversation request message into, and PBA message changes into creates conversational response message.
Explain:
1) there is not sequencing between the step 408-410.
2) step 412 can take place any time after step 405.
Embodiment 3
This flow process is similar with embodiment 1, and the main distinction is that the address that UE obtains is an IP address, such as: mobile network be its distribution or fixed network for its distribution, as shown in Figure 5, comprising:
Carry out ppp negotiation and verification process between step 501:RG and the BNG/BRAS, in the ppp negotiation process, BNG/BRAS is that RG distributes local ip address, i.e. CPE IP.
Step 502: if this UE is a portable terminal, then and carry out PPP LCP between the RG and consult.
After step 503:RG receives the PPP LCP request message of UE,, can initiate PPP EAP authentication request message to UE as the authenticator; In the EAP identifying procedure, it is mobile phone users that RG can discern this UE, accomplish UE to the 3GPP certificate server (such as EAP identifying procedure AAA Server).
Step 504:BNG/BRAS receives after the EAP authentication request message, can initiate and BPCF between the foundation of fixed network strategy session, BPCF so can trigger and PCRF between the foundation of strategy session; Through the strategy session of setting up, can the unified coordination and administration Policies Resource between mobile network and the fixed network.
Step 505: after accomplishing the EAP authentication, UE initiates PPP IPCP request message to RG.
Step 506:RG receives after the PPP IPCP request message that based on the judgement of step 303, if this UE is a mobile phone users, then local structure dhcp discover message comprises in this message: the information of mobile network's needs such as APN, IMSI.
Step 507:BNG/BRAS receives after the dhcp discover message, can initiate PBU message to P-GW, comprises in this message: APN, information such as IMSI are to ask IP address assignment to P-GW.
Step 508:P-GW receives after the PBU message, carries out the foundation of IP-CAN session between meeting and the PCRF.
Step 509:, then carry out the renewal of P-GW sign to HSS if P-GW changes.
Step 510:P-GW receives after the PBU message, can reply PBA message to BNG/BRAS, carries the IP address into terminal distribution in this message, is called IP1
Step 511-512:BNG/BRAS receives and from message, obtains after the IP1 after the PBA message, fills out during DHCP gives information, and replies to RG.RG obtains IP1 after receiving that DHCP gives information, and sends DHCP request/dhcp response message with the BNG/BRAS that replys response, confirms the IP1 that is assigned with.
RG receives that the mobile network is after the IP1 of terminal distribution, may adopt one of following dual mode to carry out corresponding data message transmission.
Mode one (step 513a, 513a ', 514,515a):
Step 513a:RG receives after the dhcp response message, can send PPP IPCP negative acknowledgment message to UE, and this message is carried the IP1 address and given UE.
Step 513a ': UE receives after the PPP IPCP negative acknowledgment message, replys through PPP IPCP request/PPP IPCP between meeting and the RG, with the IP1 address of confirming to RG to distribute.
Step 514: if the updating strategy of needs is arranged, then PCRF can trigger and can carry out the policy update operation between itself and BPCF, BNG/BRAS and the BPCF.
Step 515a:UE is encapsulated as IP1 to the source address of the data message IP head of transmission, and destination address is the destination address of message; Then, transmit, be routed to mobile core network, to visit the business that mobile operator provides through the message of RG, BNG/BRAS etc.
Mode two (step 513b, 513b ', 514,515b):
Step 513b:RG receives after the dhcp response message, sends PPP IPCP negative acknowledgment message to UE, and this message is carried the IP2 address and given UE, and the local mapping relations that can preserve IP1 and IP2.
Step 513b ': UE receives and replys through PPPIPCP request/PPP IPCP between meeting and the RG after the PPP IPCP negative acknowledgment message, with the IP2 address of confirming to RG to distribute.
Step 514: if the updating strategy of needs is arranged, then PCRF can trigger and can carry out the policy update operation between itself and BPCF, BNG/BRAS and the BPCF.
Step 515b:UE is encapsulated as IP2 to the source address of the data message IP head of transmission, and destination address is the destination address of message; RG receives and can change to IP1 to source address, and send after this message; Then,, be routed to mobile core network, to visit the business that mobile operator provides through device forwards such as BNG/BRAS.
In addition; If this scheme need realize service distributing, through the direct access service of fixed network, then need RG can based on concrete service feature (such as: professional five-tuple information); Carry out corresponding tactful route, such as: directly through the fixed network visit or through mobile network's access service.
The encapsulation mechanism of uplink message below only is described, the purpose IP map addresses operation that the encapsulation mechanism of downlink message carries out in the heading gets final product, and does not specify at this.
Explain:
1) there is not sequencing between the step 508-510.
2) step 514 can take place any time after step 504.
Embodiment 4
This flow process is similar with embodiment 1, and the main distinction is that the address that UE obtains is an IP address, such as: mobile network be its distribution or fixed network for its distribution, as shown in Figure 6, comprising:
Carry out ppp negotiation and verification process between step 601:RG and the BNG/BRAS, in the ppp negotiation process, BNG/BRAS is that RG distributes local ip address, i.e. CPE IP.
Step 602: if this UE is a portable terminal, then and carry out PPP LCP between the RG and consult.
After step 603:RG receives the PPP LCP request message of UE,, can initiate PPP EAP authentication request message to UE as the authenticator; In the EAP identifying procedure, it is mobile phone users that RG can discern this UE, accomplish UE to the 3GPP certificate server (such as EAP identifying procedure AAA Server).
Step 604:BNG/BRAS after receiving the EAP authentication request message, can initiate and BPCF between the foundation of fixed network strategy session, BPCF so can trigger and PCRF between the foundation of strategy session; Through the strategy session of setting up, can the unified coordination and administration Policies Resource between mobile network and the fixed network.
Step 605: after accomplishing the EAP authentication, UE initiates PPP IPCP request message to RG.
Step 606:RG receives after the PPP IPCP request message that based on the judgement of step 403, if this UE is a mobile phone users, then local structure PBU message comprises in this message: the information of mobile network's needs such as APN, IMSI.
BNG/BRAS receives after the PBU message, can transmit PBU message to P-GW, comprises in this message: APN, information such as IMSI are to ask IP address assignment to P-GW.
Step 607:P-GW receives after the PBU message, carries out the foundation of IP-CAN session between meeting and the PCRF.
Step 608:, then carry out the renewal of P-GW sign to HSS if P-GW changes.
Step 609:P-GW receives after the PBU message, can reply PBA message to BNG/BRAS, carries the IP address into terminal distribution in this message, is called IP1.BNG/BRAS transmits PBA message and gives RG.
RG receives that the mobile network is after the IP1 of terminal distribution, may adopt one of following dual mode to carry out different data message encapsulation.
Mode one (step 610a, 610a ', 611,612a):
Step 610a:RG receives after the dhcp response message, can send PPP IPCP negative acknowledgment message to UE, and this message is carried the IP1 address and given UE.
Step 610a ': UE receives and replys through PPPIPCP request/PPP IPCP between meeting and the RG after the PPP IPCP negative acknowledgment message, confirms the IP1 address of distributing to RG.
Step 611: if the updating strategy of needs is arranged, then PCRF can trigger and can carry out the policy update operation between itself and BPCF, BNG/BRAS and the BPCF.
Step 612a:UE is encapsulated as IP1 to the source address of the data message IP head of transmission, and destination address is the destination address of message; Then, transmit, be routed to mobile core network, to visit the business that mobile operator provides through the message of RG, BNG/BRAS etc.
Mode two (step 610b, 610b ', 611,612b):
Step 610b:RG receives after the dhcp response message, sends PPP IPCP negative acknowledgment message to UE, and this message is carried the IP2 address and given UE, and the local mapping relations that can preserve IP1 and IP2.
Step 610b ': UE receives and replys through PPPIPCP request/PPP IPCP between meeting and the RG after the PPP IPCP negative acknowledgment message, with the IP2 address of confirming to RG to distribute.
Step 611: if the updating strategy of needs is arranged, then PCRF can trigger and can carry out the policy update operation between itself and BPCF, BNG/BRAS and the BPCF.
Step 612b:UE is encapsulated as IP2 to the source address of the data message IP head of transmission, and destination address is the destination address of message; RG receives and can change to IP1 to source address, and send after this message; Then,, be routed to mobile core network, to visit the business that mobile operator provides through device forwards such as BNG/BRAS.
In addition; If this scheme need realize service distributing, through the direct access service of fixed network, then need RG can based on concrete service feature (such as: professional five-tuple information); Carry out corresponding tactful route, such as: directly through the fixed network visit or through mobile network's access service.
The encapsulation mechanism of uplink message below only is described, the encapsulation mechanism of downlink message carries out purpose IP in the heading and carries out map operation and get final product, and does not specify at this.
In addition, between BNG/BRAS and P-GW,, can also adopt the GTP agreement except adopting the PMIP agreement; If adopt the GTP agreement, then PBU message changes the establishment conversation request message into, and PBA message changes into creates conversational response message.
Explain:
1) there is not sequencing between the step 607-609.
2) step 611 can take place any time after step 604.
Based on said method embodiment, the present invention proposes the system that passes through fixed network access mobile core network trusty based on said method embodiment, and this system comprises:
Address acquisition module is used between UE, RG, BNG/BRAS and mobile core network, carrying out interacting message, to obtain mobile core network for moving the UE IP address allocated; In this module, RG sends message to BNG/BRAS, triggers the interacting message between fixed network and the mobile core network, and asking and obtaining mobile core network is to move UE distributing IP address;
Address processing module is used for after RG acquisition mobile core network is the UE IP address allocated, carries out the corresponding IP address mapping relations and handling, and the IP address is offered UE;
The Operational Visit module is used for the IP address that UE adopts RG to provide, through the mobile network or directly through the fixed network access service.
Further, said system also comprises: the ppp negotiation module is used at RG before BNG/BRAS sends message, carrying out PPP LCP between said mobile UE and the RG and consulting, and accomplishes PPP EAP identifying procedure, and carries out the PPP ipcp negotiation.
Because this system realizes based on said method embodiment; Therefore, each module that is comprised in the said system all is for realizing that the corresponding step flow process is established among above-mentioned each method embodiment, further; Also can carry out refinement or pass through additional new module system embodiment of the present invention; To accomplish the function that each steps flow chart corresponding with each method embodiment accomplished,, repeat no more for saving space here.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, 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 merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.
Claims (12)
1. method through fixed network access mobile core network trusty, this method are applied to mobile subscriber terminal (UE) through trusting fixed network access mobile core network, and the home gateway in the fixed network (RG) is in the scene of route pattern, it is characterized in that,
After moving UE access RG, RG sends message to broadband gateway (BNG)/broadband remote access servers (BRAS), triggers the interacting message between fixed network and the mobile core network, and the request mobile core network is this UE distributing IP address;
It is said mobile UE IP address allocated that RG obtains mobile core network, and carries out after the processing of corresponding IP address mapping relations the IP address being offered said mobile UE;
The IP address that said mobile UE adopts RG to provide is through the mobile network or directly through the fixed network access service.
2. method according to claim 1 is characterized in that, said " RG sends message to BNG/BRAS " before, also comprises:
Carry out point-to-point protocol LCP (PPP LCP) between said mobile UE and the RG and consult, and accomplish point-to-point protocol expansion authentication protocol (PPP EAP) identifying procedure, and carry out point-to-point IP control protocol (PPP IPCP) and consult.
3. method according to claim 1 is characterized in that,
If said mobile UE supports two IP address coexistences; Then between said mobile UE and RG, carrying out PPP LCP consults also to comprise before: said mobile UE sends DHCP (DHCP) message to RG; After said mobile UE and RG completion DHCP negotiation, RG is that said mobile UE distributes an address;
If said mobile UE only supports an IP address, then said mobile UE directly and carry out PPP LCP between the RG and consult.
4. method according to claim 1 is characterized in that, said RG judges according to the user totem information that carries in expansion authentication protocol (EAP) authentication message whether current be to move UE to insert.
5. method according to claim 1; It is characterized in that; Said RG is for triggering the interacting message between fixed network and the mobile core network; To the message that BNG/BRAS sent is dhcp message or proxy-mobile IP (PMIP) message, comprises international mobile subscriber identity (IMSI) and APN (APN) information in said dhcp message or the PMIP message.
6. method according to claim 5 is characterized in that,
After BNG/BRAS receives the dhcp message or PMIP message that said RG sends, send PMIP message and give grouped data network gateway (P-GW), to accomplish the flow process relevant with the mobile network; The said flow process relevant with the mobile network comprises: foundation of PMIP tunnel and IP address assignment, IP-CAN session are set up and P-GW identification renewal flow process.
7. method according to claim 1 is characterized in that,
It is said mobile UE IP address allocated that dhcp message that said RG sends through BNG or PMIP message are obtained mobile core network.
8. method according to claim 1 is characterized in that,
Network is that said mobile UE distributes two IP addresses or an IP address; Said two IP addresses comprise that fixed network is that UE IP address allocated and mobile network are the UE IP address allocated;
Said IP address mapping relation is that fixed network is that UE IP address allocated and mobile network are the mapping relations between its IP address allocated.
9. method according to claim 8 is characterized in that, corresponding encapsulation process is carried out to the data message in the IP address that said mobile UE adopts RG to provide;
Preserving two IP addresses or preserve a mobile core network at said mobile UE is its IP address allocated, and needs through under the situation of mobile network's access service, and said mobile UE is that message packaged source address is that mobile core network is its IP address allocated;
When fixed network of said mobile UE preservation was its IP address allocated, said mobile UE was that message packaged source address is that fixed network is its IP address allocated.
10. method according to claim 8 is characterized in that, said mobile UE need be through in the process of mobile network's access service, and said RG carries out map addresses to the data message and handles according to the IP address mapping relation of this locality:
Preserve two IP addresses or preserve a mobile core network at said mobile UE and be its IP address allocated, and when needing through mobile network's access service, RG is responsible for message and transmits;
When fixed network of said mobile UE preservation is its IP address allocated; RG is according to the IP address mapping relation; With fixed network in the heading is that to change to mobile core network be said mobile UE IP address allocated to said mobile UE IP address allocated; With through mobile network's access service, perhaps carry out corresponding tactful route based on service feature.
11. the system through fixed network access mobile core network trusty is characterized in that this system comprises:
Address acquisition module is used between UE, RG, BNG/BRAS and mobile core network, carrying out interacting message, to obtain mobile core network for moving the UE IP address allocated; In this module, RG sends message to BNG/BRAS, triggers the interacting message between fixed network and the mobile core network, and asking and obtaining mobile core network is to move UE distributing IP address;
Address processing module is used for after RG acquisition mobile core network is the UE IP address allocated, carries out the corresponding IP address mapping relations and handling, and the IP address is offered UE;
The Operational Visit module is used for the IP address that UE adopts RG to provide, through the mobile network or directly through the fixed network access service.
12. system according to claim 11 is characterized in that, this system also comprises:
The ppp negotiation module; Be used at RG before BNG/BRAS sends message; Carrying out point-to-point protocol LCP (PPP LCP) between said mobile UE and the RG consults; And accomplish point-to-point protocol expansion authentication protocol (PPP EAP) identifying procedure, and carry out point-to-point IP control protocol (PPP IPCP) and consult.
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| CN201110035882.1A CN102740401B (en) | 2011-02-10 | A kind of method and system by fixed network access mobile core network trusty | |
| PCT/CN2012/070492 WO2012106984A1 (en) | 2011-02-10 | 2012-01-17 | Method and system for accessing mobile core network through trustworthy fixed network |
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| CN201110035882.1A CN102740401B (en) | 2011-02-10 | A kind of method and system by fixed network access mobile core network trusty |
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