CN101227506A

CN101227506A - Equipment, system and method for identifying subscriber terminal

Info

Publication number: CN101227506A
Application number: CN200710305536.4A
Authority: CN
Inventors: 文楷; 彭世强
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2007-01-01
Filing date: 2007-12-24
Publication date: 2008-07-23
Anticipated expiration: 2027-12-24
Also published as: CN101227506B; WO2008080341A1

Abstract

The invention discloses an identification method of a user terminal in the network, a system and a device. The method links the user identification of an access layer in the network with the user identification of a business layer, wherein the linkage principle is that the user terminal address and the domain identification are used as the access layer identification of the user terminal, and are utilized to identify the user terminal. Additionally, the identification process of the domain identification and the application range can be expanded through arranging the relative relationship between the domain identification and the device address in the network. The scheme of the invention can conduct the effective interaction between the business layer and the access layer, and can inquire the relative information of the user terminal for the access layer through different business demands. The terminal device is not required with special requests, which can switch in terminals with different models, and the scheme can be simply realized without the signaling expansion demand basically. The domain identification which is expanded can be applied in more complicated networking scenes.

Description

A kind of method of identifying subscriber terminal, system and equipment

Technical field

The present invention relates to network communications technology, relate in particular to identification method, system and the equipment of user terminal in following NGN network.

Background technology

Present ITU-T (International Telecommunication Union, standardization department of international telecommunication union telecommunication) and TISPAN (The Telecoms; Internet converged Services ﹠amp; Protocolsfor Advanced Networks, Dian Xin ﹠amp; The Internet converges service ﹠amp; High-level network protocol) organize all in the network architecture of formulating following NGN (Next Generation Network, next generation network) as telecommunication standard international and Europe respectively, its framework is divided into following several sections:

Professional control and application subsystem, comprise IMS (Internet Protocol MultimediaSubsystem, IP Multimedia System), PSTN (Public Switched Telephone Network, public switch telephone network)/ISDN (Integrated Service Digital Network, integrated services digital network) emulation, Streaming Media etc. are finished the service control function of various application and miscellaneous service are provided; RACS (Resource and Admission Control Subsystem, resource and accommodation control subsystem): finish control, distribution, the management function of bearer network resource based on business demand, guarantee professional service quality; NASS (Network Attachment Sub-System, Network Attachment Subsystem): the configuration feature of finishing Certificate Authority, address assignment, position information of user's terminal and the terminal of network access layer; Transmit subsystem: the transmitting function of under the control of above-mentioned subsystem, finishing the diverse network message.

NGN network architecture involvement aspect is very wide, and wherein, the functional entity of the NASS that Network Attachment Subsystem NASS defines in the TISPAN normal structure as shown in Figure 1.Network Attachment Subsystem NASS comprises following several functional entity: AMF (Access Management Function, access management function), NACF (Network Access Configuration Function, network access configuration function), CLF (Connect Language Function, connectivity session positioning function), UAAF (User AccessAuthorization Function, the user access authorization function), PDBF (Profile Database Function, the user-subscribed database function) and CPECF/CDCF (CPE Configuration Function/CPEDevice Configuration Function, subscriber terminal equipment configuration feature).

The external interface of Network Attachment Subsystem NASS shown in Figure 1 is as follows:

The interface e1 of AMF and UE (User Equipment, user terminal): user terminal initiates to insert request by this interface to network;

The interface e2:NASS subsystem of CLF and professional control and application subsystem provides the information such as on-position (access device sign and line identification), access authentication result of user terminal to business control and application subsystem by this interface;

The interface e3:NASS subsystem of CPECF/CDCF and user terminal is finished configuration management function to user terminal by this interface, as initial configuration, software upgrading etc.;

The interface e4:NASS subsystem of CLF and RACS provides the accessing position information of user terminal to the RACS subsystem, be used for the RACS subsystem according to the user accessing terminal and whether the method for salary distribution and the resource allocation of access way decision resource satisfy professional demand.

RACS is between core key-course and the Access Layer, has both had part key-course function and has also had a part of Access Layer function.As shown in Figure 2, the structure of RACS comprises: ARACF (Access Resource andAdmission Control Function, access network resource and accommodating control function) and SPDF (Service-based Policy Decision Function, business game decision function), associated entity has access node, IP edge and boundary node.User terminal is linked into the IMS network by transport layer wherein.Transport layer comprises and concrete relevant access node, L2T Point equipment, boundary node, RCEF (the Resource Control Enforcement Function of access technology, function is implemented in resource control) equipment and BGF (Border Gateway Function, Border Gateway Function) equipment.BGF finishes the gate to information flow, and in the physical operator networking, the IMS signaling of user terminal can be passed through BGF, also can be without BGF.

Relevant criterion tissues such as TISPAN and ITU-T have defined above-mentioned functions physical model and interface model at present, and interaction flow roughly between NASS subsystem internal entity, also carried out the definition on the function for the interface between NASS subsystem and external subsystems in addition.For example, the e2 of CLF entity and professional control subsystem, professional control subsystem is by the accessing position information of e2 to CLF inquiry specific user terminal, as user terminal at the line information of Access Network etc.; Based on the accessing position information of user terminal, professional control subsystem can provide relevant business, for example urgent call to the user.Equally, by the e4 interface between CLF and RACS, positional information and access carrier that RACS can obtain specific user terminal are the QoS Profile (Quality of Service Profile, quality of service configuration file) of specific user terminal configuration.Based on this, RACS carries out session admittance control again in conjunction with the access network resource situation to the session that specific user terminal is initiated.

Professional control subsystem will be inquired about the relevant information of specific user terminal to NASS, and to be both be consistent to the identification means of user terminal precondition.NASS belongs to Access Layer, and professional control subsystem belongs to operation layer, and this causes NASS and professional control subsystem may adhere to different operators separately, and NASS can use (other application except that IMS) for multiple business the user terminal location inquiry service is provided.Ordinary business practice layer and Access Layer have separately the definition to user ID respectively, for example the user has ADSL (Asymmetric Digital Subscriber Line, ADSL (Asymmetric Digital Subscriber Line)) account number has been opened the IMS business simultaneously, and then this user also has the IMS user ID.If to CLF inquiring user terminal positional information, CLF can cause corresponding information can't be provided because of not being familiar with this sign the IMS service sub-system by the IMS user ID.Therefore how carrying out related at Access Layer and operation layer user ID is a problem that needs to be resolved hurrily, and only after addressing this problem, operation layer and Access Layer just might carry out effectively mutual.

Summary of the invention

The present invention seeks at the problems referred to above, provide between professional control subsystem and the NASS subsystem, between RACS and the NASS subsystem, the solution of user information correlation.

For achieving the above object, embodiments of the invention propose a kind of method of identifying subscriber terminal, are applied to comprise at least the system of connectivity session positioning function CLF equipment and Proxy Call Session Control Function PCSCF equipment, comprise the steps:

Described CLF equipment obtains the Internet Protocol IP address and the PCSCF domain identifier of user terminal;

Described PCSCF equipment receives the teleservice request, obtains the IP address and the PCSCF domain identifier of described user terminal;

Described PCSCF equipment and CLF equipment carry out service message when mutual, utilize the PCSCF domain identifier and the IP address designation user terminal of described user terminal.

Embodiments of the invention also propose a kind of system of identifying subscriber terminal, comprise PCSCF equipment, CLF equipment and NACF equipment,

Described CLF equipment obtains the PCSCF domain identifier of described user terminal according to the NACF domain identifier of the user terminal of described NACF equipment generation, with the IP address of described user terminal and the PCSCF domain identifier sign as described user terminal, and it is mutual to carry out business information according to the sign of described user terminal and described PCSCF equipment;

Described PCSCF equipment is provided with the corresponding relation in service request source address scope and PCSCF territory, obtain the IP address of user terminal and PCSCF domain identifier sign, and it is mutual to carry out business information according to the sign of described user terminal and described CLF equipment as described user terminal;

Described NACF equipment is user terminal distributing IP, the NACF domain identifier that generates user terminal and the NACF domain identifier of described user terminal is sent to described CLF equipment.

Embodiments of the invention also propose a kind of CLF equipment, comprise correspondence relation storage and CLF domain service interaction unit,

Described correspondence relation storage, the corresponding relation in storage NACF territory and PCSCF territory, and the sign that the IP address and the PCSCF domain identifier of described user terminal is stored as described user terminal;

Described CLF domain service interaction unit, obtain the IP address and the NACF domain identifier of user terminal, content according to the storage of described correspondence relation storage is obtained the PCSCF domain identifier of user terminal, and it is mutual to utilize the sign of described user terminal and described PCSCF equipment to carry out business information.

Embodiments of the invention also propose a kind of PCSCF equipment, comprise PCSCF territory memory cell and PCSCF domain service interaction unit,

Described PCSCF territory memory cell, the corresponding relation and the user terminal IP in storage service request source address realm and PCSCF territory; And the sign that the IP address and the PCSCF domain identifier of described user terminal is stored as described user terminal;

Described PCSCF domain service interaction unit, obtain the IP address of user terminal, and obtain the PCSCF domain identifier of user terminal according to the corresponding relation in the service request source address scope of described PCSCF territory cell stores and PCSCF territory, it is mutual to utilize the sign of described user terminal and described CLF equipment to carry out business information.

Compared with prior art, embodiments of the invention have the following advantages:

Embodiments of the invention can carry out effectively alternately the operation layer of network and Access Layer, and inquire about relevant user terminal relevant information according to the demand of different business to Access Layer.Embodiments of the invention do not have specific (special) requirements to user terminal, can insert dissimilar user terminals; And scheme realizes simply not having signaling expansion demand substantially.Domain identifier after the expansion can be applied in the networking scene of more complexity.

Description of drawings

Fig. 1 is the network architecture diagram of NASS system in the prior art;

Fig. 2 is a RACS functional frame composition in the prior art;

Fig. 3 is the networking situation schematic diagram that a plurality of NACF are connected with a CLF;

Fig. 4 is a kind of networking situation schematic diagram of BGF when being NAT;

Fig. 5 is the another kind of networking situation schematic diagram of BGF when being NAT;

Fig. 6 is the networking situation schematic diagram of BRAS when being NAT;

Fig. 7 is the annexation schematic diagram of signaling plane terminal to PCSCF;

Fig. 8 is the concrete signaling process figure of embodiments of the invention;

Networking situation schematic diagram when Fig. 9 is two BRAS CLF that correspondence is different respectively;

Figure 10 is the positional information signaling process figure of the user terminal trade mark enquiries CLF of the embodiment of the invention;

Figure 11 is that the PCSCF inquiry CLF of the embodiment of the invention does not have the data need be to NACF information inquiring signaling process figure;

Figure 12 is that the RACS inquiry CLF of the embodiment of the invention does not have the data need be to NACF information inquiring signaling process figure;

Figure 13 is that the pure PPPoE of the embodiment of the invention inserts, and CLF is to the information signaling process figure of RACS propelling data;

Figure 14 is the information signaling process figure of the CLF of the embodiment of the invention to the RACS propelling data;

Figure 15 is the information signaling process figure of the CLF active of the embodiment of the invention to the UAAF request msg;

Figure 16 is that the home domain of the embodiment of the invention provides professional e2 Query Information schematic diagram;

Figure 17 is that the RACS of the embodiment of the invention initiatively obtains access information signaling process figure.

Embodiment

Obtain access network resource behind the authentication of user terminal by NASS, NACF has distributed the IP address for this user terminal.CLF identifies as the user terminal Access Layer with the IP address of user terminal.When user terminal initiation IMS service request, PCSCF (Proxy-Call Session Control Function, agent call State Control function) obtains the IP address of user terminal according to the source IP address of the business request information of receiving.PCSCF is according to this user terminal Access Layer sign, and promptly user terminal IP address is inquired about the positional information that obtains user terminal to CLF.

Above method is only applicable to all user terminals all at same address field.In actual conditions, user terminal is distributed in different IP address fields usually, and the IP address that belongs to the user terminal in different IP addresses territory may be repeated, and therefore except that the IP address of user terminal, also need add domain information, could the unique identification user terminal.Wherein, the method that CLF determines the territory as shown in Figure 3, NACF is user terminal distributing IP address, then by the accessing position information of interface to CLF report of user terminal.In the PUSH request, NACF need carry user terminal IP address and input field, and wherein, NACF can generate input field by the following method.

1, NACF is that the user terminal distribution has the address pool of not overlapping IP address.NACF can be divided into same territory with all user terminals under it.In addition, be that managerial sign is convenient, also can distribute different domain identifiers for pond, location differently.For example, address pool 1 is that the access of the A of enterprise distributes the address, and address pool 2 is distributed the address for enterprise B, and NACF can divide address pool 1 corresponding user terminal into input field A, divides address pool 2 corresponding user terminal into input field B.

2, NACF is that user terminal distributes different address pool; Because have the overlapped situation in address between the different address pool, therefore, for the address pool that the IP address overlap is arranged, NACF must distinguish mutually with different domain identifiers.

As Fig. 3, the situation that exists a plurality of NACF equipment to be connected in the actual networking with a CLF.The domain identifier that this moment, NACF equipment sent is generated by each NACF, and is only unique in a specific NACF scope.For the domain identifier of avoiding different N ACF equipment to send up repeats the situation that causes CLF to distinguish mutually, also need increase the NACF device identification in the domain identifier of in CLF, preserving.

Therefore the domain identifier form among the CLF is: NACF domain identifier+NACF device identification, represent the IP territory by NACF domain identifier+NACF device identification, and can guarantee that the user terminal IP address between the same area can not repeat each other.Adopt user terminal IP address to add such domain identifier, can unique definite user terminal.After NACF was user terminal distributing IP address, to CLF report of user IP address of terminal, so CLF preserved the information of its user terminal IP address and above domain identifier for each user terminal.

In addition, also a kind of possible scheme is that the domain identifier that NACF equipment sends can be unique in all NACF scopes, at this moment, the domain identifier of preserving in CLF can include only the NACF domain identifier, and represent the IP territory by the NACF domain identifier, can guarantee that like this, also the user terminal IP address between the same area can not repeat each other.Equally, adopt user terminal IP address to add such domain identifier, can unique definite user terminal.After NACF was user terminal distributing IP address, to CLF report of user IP address of terminal, so CLF preserved the information of its user terminal IP address and above domain identifier for each user terminal.In the practical application, specifically adopt which kind of mode to decide according to the configuration of operator.

User terminal inserts IMS by fixed access network, has following several networking situation in the deployment:

1, there is not NAT between user terminal and PCSCF

User terminal and PCSCF are in same IP address field, do not have NAT (NetworkAddress Translation, network address translation) equipment between the two.The source IP address of the service request that PCSCF receives promptly is the IP address of user terminal.

2, BGF is NAT

As Fig. 4, all user terminals under the BGF belong to same address field, but different with PCSCF address territory, at this moment are NAT by BGF and finish address transition.After the NAT conversion, the source address of the service request of the user terminal that PCSCF receives is the address of BGF.PCSCF can be according to the source IP address of service request, and promptly the address of BGF1 still is the address of BGF2, and the territory of judging the user terminal place is private network 1 or private network 2.

As Fig. 5, a BRAS (Broadband Remote Access Server, Broadband Remote Access Server) user terminal of band is an IP address field down, being NAT by two different BGF finishes network address translation and is connected with PCSCF, at this moment, user terminal for private network 1, the source IP of the service request that PCSCF receives is respectively the IP address of BGF1 and BGF2, user terminal for private network 2, the source IP of the service request that PCSCF receives is respectively the IP address of BGF3 and BGF4, and PCSCF can determine the input field at user terminal place in view of the above.

3, BRAS is NAT

As Fig. 6, exist BRAS to do the situation of NAT, BRAS with user terminal may be distributed in the different IP addresses territory, all be and be connected with PCSCF after NAT finishes network address translation by BRAS.The source address of the service request that PCSCF receives is IP address and the port after BRAS does the NAT conversion.PCSCF can be according to the source address and the port of the service request of receiving, promptly according to the IP address of BRAS and port range come the differentiated service request from different input fields.

4, other networking situations

The above BGF is NAT or BRAS, and to be NAT be two kinds of common networking situations, also has the situation of being done network address translation by other independent NAT device certainly.This moment, PCSCF still distinguished territory under the user terminal according to the source IP address of service request and port.In a word, no matter above which kind of networking situation, PCSCF can determine user terminal territory of living in according to the source IP address and the corresponding port of the service request of receiving.

Above PCSCF determines the concrete grammar in territory, and determines that with NACF input field sign+NACF device identification the method for domain identifier compares among the aforementioned CLF, and there is not direct corresponding relation in two kinds of methods and inconsistent between two domain identifiers.Need between PCSCF and CLF the consistent of territory understood, therefore on the basis of aforementioned CLF identification field, CLF also need increase the PCSCF domain identifier, and promptly CLF need be to determine the PCSCF domain identifier with the similar mode of PCSCF.

Aforementioned CLF can obtain to be the user terminal IP address allocated by NACF.Have NAT when between user terminal and PCSCF, the source IP of the service request that PCSCF receives is the address after the NAT conversion, and PCSCF can't directly obtain the IP address of user terminal.At this situation, also need to solve the problem how PCSCF can obtain user terminal IP address.

Below at first illustrate the concrete grammar that PCSCF and CLF obtain the PCSCF domain identifier respectively.

Fig. 7 is the annexation schematic diagram of signaling plane terminal to PCSCF; According to network environment shown in Figure 7, the concrete application of the above method of the present invention is described.Wherein, PCSCF supports a plurality of IP physical interfaces.

ABGF is signaling plane NAT in the networking, as shown in FIG. ABGF1 and ABGF2.After ABGF had done the NAT conversion, Interface2 received SIP (Session InitiationProtocol, the session initiation protocol) message that user terminal sends.ABGF1 with user terminal and ABGF2 with user terminal belong to different IP territories, the IP address may be repeated.

No signaling plane NAT in the networking, the SIP signaling that PCSCF receives is without the NAT conversion, and in Fig. 7 networking, the IP interface Interfacel of PCSCF and corresponding terminal belong to same IP territory.

PCSCF determines the domain identifier that user terminal is affiliated according to the source IP address of receiving the SIP request.For this reason, PCSCF need preserve table 1.Set up the source address scope of PCSCF IP interface, service request and the corresponding relation of domain identifier, PCSCF determines the domain identifier that user terminal is affiliated according to the source IP address of receiving the SIP request;

Table 1 PCSCF domain identifier allocation list

PCSCF IP interface	The source address scope of service request	Domain identifier
PCSCF IP interface	The source address scope of service request	Domain identifier	INTERFACE1	IP address mask presentation address scope	PCSCF territory	1
INTERFACE2	The ABGF1 address	PCSCF territory 2	INTERFACE1	IP address mask presentation address scope	PCSCF territory	1
INTERFACE2	The ABGF1 address	PCSCF territory 2	INTERFACE2	The ABGF2 address	PCSCF territory 3

When PCSCF supports a plurality of IP interfaces simultaneously, from the service request that the different IP interface is received, source IP address may be identical, and in this case, the residing IP of user terminal territory may be different.Among Fig. 7, the user terminal IP address in PCSCF territory 1 may be identical with the ABGF1 address, but in the PCSCF territory 1 user terminal and ABGF1 with user terminal belong to the different IP territory, need differentiation.Therefore go up table and preserve PCSCF IP interface.PCSCF at first needs the differentiated service request from which IP interface to receive.

Afterwards, PCSCF reaches the source address scope of the service request that goes up the table preservation according to the source IP address and the port of service request, judges service request is from which territory.The source address scope of service request can be passed through IP address and port list, or represents by the mode of IP address mask.

Domain identifier can be a character string, is determined when networking is planned by operator.

Accordingly, CLF need determine the PCSCF domain identifier.

User terminal is in the Attachment process, and NACF need determine the NACF domain identifier for user terminal.NACF can preserve the configuration as table 2.

Table 2

DHCP Relay address realm	The NACF domain identifier
DHCP Relay address realm	The NACF domain identifier	The BRAS1 address	NACF territory	1
The BRAS2 address	NACF territory 2	The BRAS1 address	NACF territory	1
The BRAS2 address	NACF territory 2	The BRAS3 address	NACF territory 3
The BRAS4 address	NACF territory 4	The BRAS3 address	NACF territory 3
The BRAS4 address	NACF territory 4	The BRAS5 address	NACF territory 5

Fig. 7 do not draw NACF and CLF suppose that all user terminals distribute the address by same NACF, then in the data of NACF configuration as table 2.

When NACF is user terminal distributing IP address, always can be judged as the IP address which address pool this user terminal distributes, concrete judgment mode has multiple, for example judges (as table 2) according to DHCP Relay address.By configuration, NACF distributes a NACF domain identifier for each address pool.

Carry the NACF domain identifier of self during NACF and CLF are mutual, CLF disposes as table 3, determines the PCSCF domain identifier according to the NACF domain identifier.This table is disposed according to the networking situation by operator.Content in the table is an example with Fig. 7 networking.

Table 3

NACF territory 1	PCSCF territory 1
NACF territory 1	PCSCF territory 1	NACF territory 2	PCSCF territory 2
NACF territory 3	PCSCF territory 2	NACF territory 2	PCSCF territory 2
NACF territory 3	PCSCF territory 2	NACF territory 4	PCSCF territory 3
NACF territory 5	PCSCF territory 3	NACF territory 4	PCSCF territory 3

The concrete signaling process explanation of the embodiment of the invention as shown in Figure 8, wherein:

Step s801-s802, UE (User Equipment, user terminal) and NASS are mutual.CLF determines PCSCF domain identifier under the UE according to preceding method.CLF with PCSCF domain identifier+IP address of terminal sign UE, and writes down corresponding physics line attachment information in terminal location database.

Step s803-s804, UE initiates the IMS registration process.The Register request arrives PCSCF after ABGF does the NAT conversion.PCSCF is according to the IP that receives bag source address, and look-up table 1 is determined the PCSCF domain identifier of UE.

Step s805-s806, PCSCF finishes application layer authentication to Register request, PCSCF and ABGF alternately from ABGF obtain UE without NAT conversion IP address before.

Also a kind of possible implementation is: CLF identifies UE with NACF domain identifier+IP address of terminal in terminal location database, and writes down corresponding physics line attachment information.When CLF receives Query Information from PCSCF, according to the mapping relations of table 3 and the information of in terminal location database, preserving, find corresponding line attachment positional information, s808 returns to PCSCF in step.

Step s807-s808, PCSCF are by the accessing position information of step s807 to CLF inquiry UE, wherein with PCSCF domain identifier and user terminal IP address sign UE.CLF finds corresponding line attachment positional information according to location database, and s808 returns to PCSCF in step.PCSCF is with the part of records of user terminal physical location information as the UE log-on message.The positional information of this UE can be used in the follow-up Business Processing.

Step s809-s810, PCSCF returns 200 responses at Register.

Step s811-s812, the follow-up service request Invite that sends of UE, PCSCF is routed to SCSCF (Serving CSCF, service call conversation control function) with it.At this moment, in the Business Processing that the positional information of UE can be used for being correlated with, as emergence call service.

Step s813-s814, PCSCF is to SPDF (Service Policy Decision Function, the safety policy decision making function) issue QoS and admit control request, wherein carry UE sign (domain identifier+user terminal IP address), and the positional information of the previous UE that preserves.RACS can carry out the judgement that QoS admits control according to the positional information of UE, and RACS is identified by UE, also can be mutual by e4 interface and NASS, for example obtain the QoS Profile of user terminal.

Step s815-s816, SPDF and ABGF are mutual, and requiring ABGF is terminal media flow distribution port binding.The source IP and the port that wherein have Media Stream, same because the overlapping problem of address field is carried the PCSCF domain identifier in the order that BGF issues, this moment, BGF can distinguish different UEs, for different UE distributes different port mapping.

The s805-s806 of step described in the flow process, PCSCF and ABGF obtain UE alternately in the IP address before the NAT conversion, and the method has certain limitation in networking, require to finish nat feature by ABGF, and do not support far-end NAT.In the embodiments of the invention, except obtain the IP address of UE before the NAT conversion by this mode, also can reach identical purpose by another kind of method, promptly PCSCF can use the Contact address of UE as the IP address of UE before the NAT conversion.

At present, in the user terminal initial registration procedure, need on registrar, set up user's a AOR (Address-Of-Record, recording address) and a binding relationship between the relative users terminal, so that make follow-up request can be routed to relevant user terminals to this user terminal.Carry Contact header field in the Register request, Contact header field can comprise FQDN (Fully Qualified Domain Name, fully qualified domain name), finally navigates to user terminal thereby this FQDN is resolved for the IP address.Because of most of user terminals all do not have domain name (no FQDN), therefore common Contact header field directly comprises the IP address of user terminal.

With Fig. 8 is example, in the user terminal registration process, PCSCF is after step s804 receives the Register request message, the content that comprises according to the entrained Contact header field of Register request, be generally the IP address, even FQDN, PCSCF also can pass through DNS (Domain Name System, domain name server) resolves acquisition IP address, as the IP address of user terminal.Except that the processing of step s805-806 by this place describe substitute, other handling processes are as hereinbefore.

In addition, the IP address of the Contact header field content in utilizing Register as user terminal, PCSCF also can use the Contact header field content of carrying among the conversation request Invite of the reception IP address as user terminal.

Except can being used from the sign of user terminal with user terminal IP address one, the PCSCF domain identifier after through expansion, can also be in the networking scene of more complexity identifying subscriber terminal.

Expansion embodiment one: by the e2 of Fig. 1, when PCSCF obtains the positional information of user terminal from CLF, the situation of a plurality of CLF equipment that may have a PCSCF correspondence.At this moment, when the user terminal registration, when PCSCF need obtain position information of user's terminal, PCSCF still can find corresponding CLF equipment by the PCSCF domain identifier.In the PCSCF of aforementioned table 1 domain identifier allocation list, increase CLF device identification (or allocation list), the corresponding relation of record PCSCF domain identifier and CLF device identification by increasing newly.When PCSCF receives the teleservice request, according to the source address of service request, obtain the PCSCF domain identifier by table 1, also obtain corresponding CLF device identification simultaneously, PCSCF knows the positional information which CLF equipment to remove to obtain user terminal to thus.

Under this scene situation, operator the IP address of the user terminal in guaranteeing same territory is not overlapping, also needs to guarantee the corresponding CLF equipment of a PCSCF domain identifier when planning PCSCF domain identifier.As the networking situation of Fig. 9, two BRAS equipment belong to same IP territory in the IP address of the user terminal of band down, originally can be divided into same PCSCF territory.But in this scene, because two CLF (corresponding two the CLF equipment of PCSCF) that BRAS is corresponding different respectively, so the user terminal under two BRAS need be divided into two different PCSCF territories.PCSCF is according to the source address of teleservice request, and can distinguish from PCSCF territory 1 still is PCSCF territory 2, determines which CLF equipment to obtain position information of user's terminal alternately with thus.

Under this scene situation, in the user terminal registration process, PCSCF receives after the teleservice request with mutual process such as the signaling process of CLF shown in Figure 10, may further comprise the steps: (PCSCF registers a plurality of CLF)

Step s1001, UE sends Register message to PCSCF.

Step s1002, PCSCF obtain the source IP address of UE, find UE corresponding address territory by PCSCF territory mapping table, and (this step supposes that corresponding CLF is designated CLF1 in describing to find corresponding CLF sign simultaneously; When the corresponding CLF of hypothesis was designated CLF2, process was identical).PCSCF structure UDR (User Data Request, user's request) message comprises the parameters such as source IP address, SubscriberID, PCSCF ID and a request tabulation of Register message to the positional information of CLF1 inquiry UE in the message.Wherein, a request tabulation is optional parameters.

Step s1003, CLF1 is according to parameters such as source IP addresss, the inquiry local data base, if find corresponding record, then return UDA (User Data Answer, user data response) message, comprise parameters such as cause value, SubscriberID, positional information, RACS tie point, access network type and terminal type in the message to PCSCF, wherein, SubscriberID, positional information, RACS tie point, access network type and terminal type are optional parameters.

Step s1004, PCSCF adds the UE positional information that inquires in the Access Network information header field of Register message to, sends next to and jumps network element ICSCF (Interrogating CSCF, consultant call conversation control function).

Step s1005, after ICSCF receives Register message, send UAR (User AuthorizationRequest, user-authorization-request) message and give the login state of HSS (Home Subscriber Server, home subscriber server) inquiry UE and the capability set of SCSCF.

Step s1006, HSS return UAA (User Authorization Answer, subscriber authorisation response) message and give ICSCF, comprise the essential capability set of SCSCF of distributing to UE in the message, make ICSCF can select a SCSCF.

Step s1007, ICSCF selects a SCSCF based on the capability set that returns, and sends Register message to SCSCF, comprises the positional information of UE in the Access Network information header field of Register message.

Step s1008, SCSCF sends MAR (Message Authentication Block, message authentication code group) message and obtains corresponding verify data to HSS.

Step s1009, HSS are the title that UE preserves SCSCF, and return response message MAA (Message Authentication Algorithm, message identification algorithm), may carry the signatory positional information of UE in the message, are used for authenticating according to the UE positional information.

UE positional information that step s1010, SCSCF relatively obtain from HSS and the UE positional information the Register message if identical then authentication is passed through, are returned 200 OK message to ICSCF.

Step s101 1, and ICSCF returns 200 OK message to PCSCF.

Step s1012, PCSCF returns 200 OK message to UE, and registration is finished.

Expansion embodiment two: by the a2 of Fig. 1, NACF can report CLF with positional information of user terminal etc., but under a lot of scenes, such as CLF restart, NACF initiatively do not send Bind when request, need may there be the situation of the corresponding a plurality of NACF of a CLF in CLF to the positional information of NACF active inquiry user terminal.

This moment, CLF can find corresponding NACF equipment by the NACF domain identifier.Scene and RACS in user terminal registration PCSCF active inquiry initiatively obtain in the scene of user terminal QoS information, and PCSCF and RACS can pass to CLF with the PCSCF domain identifier.CLF disposes the corresponding relation of NACF domain identifier and NACF device address again according to allocation list 3.CLF can be converted into the NACF domain identifier with the PCSCF domain identifier by table 1, finds corresponding NACF device address by the NACF domain identifier then.

In this scene, operator need guarantee that the PCSCF territory is consistent with NACF territory create-rule, and same NACF domain identifier can not be configured on two NACF equipment, i.e. the corresponding NACF equipment of NACF domain identifier.

In this scene, PCSCF is when CLF inquiring position information, and CLF does not have positional information, and to the reciprocal process of NACF active inquiry as shown in figure 11, may further comprise the steps:

Step s1101, PCSCF sends UDR message to CLF;

Step s1102, CLF obtain user terminal source IP address and PCSCF domain identifier in the message after receiving the UDR message of PCSCF transmission.CLF finds the mapping in PCSCF territory and NACF territory by table 3, finds the address (this step describe in the NACF equipment that finds of hypothesis CLF be NACF1) of corresponding NACF equipment again.The source IP address that comprises Register message in the UDR message of PCSCF, Subscriber ID, parameters such as a request tabulation, wherein a request tabulation is optional parameters.Then, CLF initiates the position data query requests according to parameters such as IP addresses to NACF1;

Step s1103, NACF1 home position information inquiry response;

Step s1104, CLF returns UDA message to PCSCF, comprises parameters such as cause value, SubscriberID, positional information, RACS tie point, access network type and terminal type in the message.Wherein, SubscriberID, positional information, RACS tie point, access network type and terminal type are optional parameters.

PCSCF is when CLF inquiring position information, and CLF is identical to the reciprocal process of NACF1 active inquiry with above-mentioned CLF to the reciprocal process of NACF2 active inquiry.

As RACS during to CLF inquiry QoS information, CLF does not have positional information, and to the reciprocal process of NACF active inquiry as shown in figure 12, may further comprise the steps:

Step s1201, RACS sends UDR message to CLF, and message content is with Access Profile Pull definition corresponding in the e4 interface standard, request access information;

Step s1202, CLF find the address (this step supposes that the NACF equipment that CLF finds is NACF1 in describing) of corresponding NACF equipment according to parameters such as IP addresses.Initiate the position data query requests to NACF1 then;

Step s1203, NACF1 home position information inquiry response;

Step s1204, CLF returns UDA message to RACS, and message content returns user terminal IP address, positional information, QoS template and initial gate information with Access Profile Push definition corresponding in the standard, carries out relevant treatment by RACS.

RACS is when CLF inquiry QoS information, and CLF is identical to the reciprocal process of NACF1 active inquiry with above-mentioned CLF to the reciprocal process of NACF2 active inquiry.

Expansion embodiment three: by the e4 interface of Fig. 1, CLF can report RACS with information such as the positional information of user terminal and Profile data, may have the scene of the corresponding a plurality of RACS of a CLF.

Wherein, CLF need comprise to the scene that RACS pushes IP address and Profile data:

1, user terminal is by PPPoE (Point-to-Point Protocol over Ethernet, point-to-point protocol on the Ethernet) behind access authentication and the distributing IP address, AAA (Authentication/Authorization/Accounting, discriminating/mandate/charging system) IP address and the Profile data with user terminal are pushed on the CLF, and CLF need push the IP and the Profile data of user terminal to RACS;

2, user terminal DHCP (Dynamic Host Configuration Protocol, the server DHCP) inserts, after the aaa authentication success, AAA is pushed to the Profile data of user terminal on the CLF, then by NACF distributing IP address, after NACF was tied to IP address and position data CLF and goes up, CLF need push the IP and the Profile data of user terminal to RACS;

3, similar and the 2nd kind of mode of the access way of 802.1x;

4, user terminal inserts by PPPoE, by aaa authentication, AAA is pushed to the Profile data on the CLF, then by NACF distributing IP address, after NACF was tied to IP address and position data CLF and goes up, CLF need push the IP and the Profile data of user terminal to RACS;

5, user terminal is by accesses such as PPPoE/DHCP/802.1x, by aaa authentication, AAA not active push Profile data is pushed on the CLF, then by NACF distributing IP address, this moment, CLF was initiatively to the AAA request msg, after asking successfully, CLF need push the IP and the Profile data of user terminal to RACS with the related binding with the Profile data in IP address;

This moment, CLF can find corresponding RACS equipment by the PCSCF domain identifier.In the process of user terminal access authentication and distributing IP address, NACF can pass to CLF with the NACF domain identifier of user terminal correspondence.CLF allocation list 3 disposes the corresponding relation of PCSCF domain identifier and RACS device address again.CLF can be converted into the PCSCF domain identifier with the NACF domain identifier by table 1, finds the address of corresponding RACS equipment then by the PCSCF domain identifier.

In this scene, operator need guarantee the PCSCF territory on the CLF and the mapping of RACS equipment, and is consistent with the mapping of PCSCF territory on the PCSCF and RACS equipment.Guarantee the corresponding RACS equipment of a PCSCF domain identifier simultaneously.

In the scene of pure PPPoE, access authentication and address assignment are all finished by UAAF, this moment CLF push to RACS user terminal the Profile data message interaction process as shown in figure 13, may further comprise the steps:

Step s1301, UE initiates PPP Setup request to AMF, request distributing IP address;

Step s1302, AMF will send RadiusAccess Request to UAAF according to information such as the port of UE, types, and request UAAF carries out authentication to UE;

Step s1303, UAAF carries out authentication to inserting request, if success then be UE distributing IP address, and would return success response; Otherwise return failure;

Step s1304, when UE behind authentication success on the UAAF, UAAF sends Access Profile Push message to CLF, comprises in the message that user ID, user terminal IP address, Logical Access ID, hiding sign, QoS Template Information, initial gate are provided with parameter; Wherein, parameter is set is optional parameters for QoS Template Information and initial gate.

Step s1305, the information such as IP that AMF distributes are converted into the PPPoE agreement and are handed down to UE;

Step s1306 is to step s1307, and CLF pushes Access Profile Push message to RACS, comprises information such as user terminal IP address, positional information, QoS template and initial gate.

Step s1308, CLF sends Access Profile Push Response message to UAAF.

User terminal inserts, authentication success back UAAF initiatively pushes the Profile data to CLF, and to CLF binding Bind position data, the reciprocal process that this moment, CLF pushed the PUSH data to RACS may further comprise the steps as shown in figure 14 after the NACF distributing IP:

Step s1401, UE initiates PPP Setup request to AMF, request distributing IP address;

Step s1402, AMF will send RadiusAccess Request to UAAF according to information such as the port of UE, types, and request UAAF carries out authentication to UE;

Step s1403, UAAF carries out authentication to inserting request, if success then return success response continues to handle, otherwise returns failure;

Step s1404, when UE behind authentication success on the UAAF, UAAF sends Access Profile Push message to CLF, comprises in the message that user ID, user terminal IP address, Logical Access ID, hiding sign, QoS Template Information and initial gate are provided with parameter; Wherein, parameter is set is option for QoS Template Information and initial gate.

Step s1405, CLF sends Access Profile Push Response message to UAAF.

Step s1406, after the authentication success, AMF will send DHCP DISCOVER request to UAAF, and NACF is to being UE distributing IP address in request; AMF should carry Option 82 to the DHCP message that NACF transmits;

Step s1407, NACF for UE distributing IP address, if be allocated successfully, return DHCP OFFER according to address allocation policy, carry IP address and other DHCP option parameters of distributing to UE in the message; If distribute failure, discard processing;

Step s1408, AMF send DHCP REQUEST request, are used for confirming the IP address of DHCP OFFER; NACF must do the judgement and the legal inspection of purposes;

After step s1409, NACF receive the DHCP REQUEST request of AMF, upload the information of user terminal IP address, physics access ID, logic access ID and terminal type to CLF; CLF is responsible for by user terminal IP and logic ID etc. the configuration data of UE being bound, and issues the server info of IMS;

Step s1410, CLF issue the data such as address of CNGCF (Customer Network GatewayConfiguration Function, user gateway configuration feature), physical positioning information, PCSCF to NACF;

Step s1411, server address and parameter among the DHCP REQUEST of NACF affirmation UE are handed down to AMF by DHCP ACK with Option 43 (CNGCF address)/Option 120 (PCSCF address)/Option123 additional parameters (optional) such as (UE geographical location information);

Step s1412, information such as server address such as IP that AMF distributes and PCSCF are converted into the PPPoE agreement and are handed down to UE;

Step s1413, CLF pushes Access Profile Push message to RACS, comprises information such as user terminal IP address, positional information, QoS template and initial gate;

Step s1414, RACS return Access Profile Push response.

Expansion embodiment four: by aforesaid a4 interface, UAAF can report CLF with the Profile information of user terminal etc., and CLF also can inquire about (Pull) data to UAAF.User terminal insert by DHCP and the distributing IP address after NACF initiatively obtain in the scene of user terminal QoS information to the scene of CLF request binding (Bind), the scene and the RACS of user terminal registration PCSCF active inquiry, if there are not the Profile data of user terminal, need when the UAAF request msg, relate to the problem how CLF finds corresponding UAAF equipment.This moment, CLF can find corresponding UAAF equipment by the NACF domain identifier.

Binding in the scene of (Bind) to the CLF request behind the NACF distributing IP address, NACF can pass to CLF with the NACF domain identifier.Need to dispose the corresponding relation of the address of NACF domain identifier and UAAF equipment above the CLF.CLF can find corresponding UAAF device address by NACF domain identifier in the mapping relations table.

Scene and RACS in user terminal registration PCSCF active inquiry initiatively obtain in the scene of user terminal QoS information, and PCSCF and RACS can pass to CLF with the PCSCF domain identifier.CLF allocation list 3 disposes the corresponding relation of the address of NACF domain identifier and UAAF equipment again; CLF is converted into the NACF domain identifier by table 1 with the PCSCF domain identifier, finds corresponding UAAF device address by the NACF domain identifier then.

In this scene, operator need guarantee that the PCSCF territory is consistent with NACF territory create-rule, guarantees the corresponding UAAF equipment of a NACF domain identifier.

User terminal insert by DHCP and the distributing IP address after, NACF need send bind request to CLF, if UAAF is not pushed to the Profile data of user terminal on the CLF, then CLF need may further comprise the steps to the reciprocal process of UAAF active request data as shown in figure 15:

Step s1501, UE initiate DHCP DISCOVER broadcasting, request distributing IP address; ARF (Access link Relay Function access link signaling transfer point) carries out DHCP Relay, and inserts Option 82 in message, sign UE positional information;

Step s1502, AMF will initiate implicit authentication according to the port of UE, send RadiusAccess Request to UAAF, and request UAAF carries out authentication to UE;

Step s1503, UAAF carries out authentication to inserting request, if success then return success response continues the processing of L1, L2, otherwise returns failure;

Step s1504, when UE behind authentication success on the UAAF, UAAF sends Access Profile Push message to CLF, comprises in the message that user ID, user terminal IP address, Logical Access ID, hiding sign, QoS Template Information and initial gate are provided with parameter; Wherein, parameter is set is option for QoS Template Information and initial gate.

Step s1505, after the authentication success, AMF will send DHCP DISCOVER request to UAAF, and request NACF is UE distributing IP address; AMF should carry Option 82 to the DHCP message that NACF transmits;

Step s1506, NACF for UE distributing IP address, if be allocated successfully, return DHCP OFFER according to address allocation policy, carry IP address and other DHCP option parameters of distributing to UE in the message; If distribute failure, discard processing;

Step s1507, UE send DHCP REQUEST request, are used for confirming the IP address of DHCP OFFER, perhaps prolong lease time; NACF must do the judgement and the legal inspection of purposes;

After step s1508, NACF receive the DHCP REQUEST request of UE, upload the information of user terminal IP address, physics access ID, logic access ID and terminal type to CLF; CLF is responsible for by User IP and logic ID etc. the configuration data of UE being bound, and issues the server info of IMS;

Step s1509 if CLF does not have the configuration data of configuration UE or the configuration data that UAAF does not report UE, then needs to download to UAAF by Access Profile Pull message the configuration data of UE;

Step s1510, UAAF return the Pull inquiry response, comprise information such as CNGCF address, PCSCF address, QoS template, initial gate;

Step s1511, CLF issue the data such as address of CNGCF, physical positioning information, PCSCF to NACF;

Step s1512, server address and parameter among the DHCP REQUEST of NACF affirmation UE are handed down to UE by DHCP ACK with Option 43 (CNGCF address)/Option 120 (PCSCF address)/Option123 additional parameters such as (UE geographical location information).

For above-mentioned steps s1504, when UE behind authentication success on the UAAF, UAAF also can send Access Profile Push message to CLF, comprises in the message that user ID, user terminal IP address, LogicalAccess ID, hiding sign, QoS Template Information and initial gate are provided with parameter; Wherein, parameter is set is option for QoS Template Information and initial gate.Step s1509, s1510 will no longer exist at this moment.

Expansion embodiment five: in nomadic scene, the user's 1 to the B of operator of the A of operator Access Network NASS authentication and distributing IP address, but enjoy the core net business by being routed to home domain A, such as IMS.At this moment, user 1 access information is stored in the Access Network NASS system of the visit territory B of operator, and business is carried out at home domain operator A place.By the e2 of Fig. 1, the visit territory CLF request user position information that home domain CLF can insert under the nomadic situation of user.

In the networking of reality, may there be the scene of the corresponding a plurality of visits territory CLF of a home domain CLF.User terminal initiatively obtains in the scene of user terminal QoS information by the scene and the RACS of registration PCSCF active inquiry, if there are not the on-position data of user terminal, need be when visiting the CLF request msg in territory, home domain CLF can find corresponding visit territory CLF equipment by the PCSCF domain identifier.

Scene and RACS in user terminal registration PCSCF active inquiry initiatively obtain in the scene of user terminal QoS information, and PCSCF and RACS can pass to the PCSCF domain identifier home domain CLF.Home domain CLF allocation list 3 disposes NACF domain identifier and the corresponding relation of visiting CLF device address, territory again; Home domain CLF is converted into the NACF domain identifier by table 1 with the PCSCF domain identifier, finds the address of corresponding visit territory CLF equipment then by the NACF domain identifier.

In this scene, operator need guarantee that the PCSCF territory is consistent with NACF territory create-rule, guarantees the corresponding visit territory CLF equipment of a NACF domain identifier.

Below signal Figure 16 is under nomadic situation, the AAA service authentication success of user terminal by the visit territory (AAA in visit territory can to the AAA of home domain request authentication user terminal), pass through the NACF distributing IP address in visit territory then, and the access information and the Profile data of user terminal are pushed to upward preservation of CLF.The CLF in angelica territory after receiving the Query Information of PCSCF, if find it is not the IP and the input field of one's own access network, the schematic diagram by CLF (promptly visit territory) the inquiring position information of e2 under this IP then.

Expansion embodiment six: by the Gq ' interface of Fig. 3, PCSCF can be to RACS down distributing resource control strategy, the situation of a plurality of RACS equipment that may have a PCSCF correspondence.At this moment, PCSCF still can find corresponding RACS equipment by the PCSCF domain identifier.Increase RACS device identification (or allocation list) at aforementioned table 1 PCSCF domain identifier allocation list, the corresponding relation of record PCSCF domain identifier and RACS device identification by increasing newly.When PCSCF receives the teleservice request, according to the source address of service request, obtain the PCSCF domain identifier by table 1, also obtain corresponding RACS device identification simultaneously, PCSCF knows the positional information which RACS equipment to remove to obtain user terminal to thus.

Under this scene situation, operator the IP address of the user terminal in guaranteeing same territory is not overlapping, also needs to guarantee the corresponding RACS equipment of a PCSCF domain identifier when planning PCSCF domain identifier.The PCSCF domain identifier of PCSCF configuration and RACS device map relation go up being consistent of configuration with CLF.

When Figure 17 is the user terminal initiation session, PCSCF down distributing resource control strategy, and RACS does not have under the user terminal Profile data conditions, to the message interaction process of CLF request Profile data.

Step s1701, PCSCF be to SPDF request resource control strategy, and SPDF sends the resource control strategy to RACS, such as resource reservation request etc.;

Step s1702, RACS sends UDR message to CLF, and message content is with Access Profile Pull definition corresponding in the standard, request access information;

Step s1703, CLF sends UDR message to UAAF, and message content is asked user terminal QoS template and initial gate information with Access Profile Pull definition corresponding in the standard;

Step s1704, UAAF returns UDA message to CLF, and message content returns user terminal QoS template and initial gate information with Access Profile Push definition corresponding in the standard;

Step s1705, CLF returns UDA message to RACS, and message content returns user terminal IP address, positional information, QoS template and initial gate information with Access Profile Push definition corresponding in the standard, and RACS carries out relevant treatment.

Embodiments of the invention also provide a kind of system of identifying subscriber terminal, comprise PCSCF equipment, CLF equipment and NACF equipment, wherein applied identical in the annexation of above-mentioned each equipment and the prior art, just expand, realized sign user terminal by function to these equipment.

Wherein, CLF equipment comprises correspondence relation storage and CLF domain service interaction unit, correspondence relation storage, storage NACF territory and the corresponding relation in PCSCF territory, NACF domain identifier, IP address and the PCSCF domain identifier of user terminal, and the sign that the IP address and the PCSCF domain identifier of described user terminal is stored as described user terminal; CLF domain service interaction unit, obtain the IP address and the NACF domain identifier of user terminal, obtain the PCSCF domain identifier of user terminal according to the content of described correspondence relation storage storage, and it is mutual to carry out business information according to the sign of the described user terminal of described correspondence relation storage storage and described PCSCF equipment.

When existing a CLF equipment corresponding in the system with a plurality of NACF equipment, correspondence relation storage is also stored the corresponding relation of NACF domain identifier and NACF device address, and CLF domain service interaction unit obtains the NACF domain identifier of described user terminal from corresponding N ACF equipment according to the corresponding relation of this NACF domain identifier and NACF device address.

In system, exist a CLF equipment and a plurality of RACS equipment at once, correspondence relation storage is also stored the corresponding relation of PCSCF domain identifier and RACS device address, and CLF domain service interaction unit sends the IP address and the information of described user terminal to corresponding RACS equipment according to the corresponding relation of this PCSCF domain identifier and RACS device address.

In system, exist a CLF equipment and a plurality of UAAF equipment at once, correspondence relation storage is also stored the corresponding relation of NACF domain identifier and UAAF device address, and CLF domain service interaction unit is according to the corresponding relation of this NACF domain identifier and the UAAF device address information to the described user terminal of corresponding UAAF equipment query.

When CLF equipment be home domain CLF equipment and and a plurality of visits territory CLF equipment at once, correspondence relation storage is also stored the corresponding relation of NACF domain identifier and visit CLF device address, territory, CLF domain service interaction unit according to this NACF domain identifier and visit CLF device address, territory corresponding relation to corresponding visit territory CLF equipment query and obtain the information of described user terminal.

PCSCF equipment comprises PCSCF territory memory cell and PCSCF domain service interaction unit, PCSCF territory memory cell, the corresponding relation in storage service request source address realm and PCSCF territory; Also store the corresponding relation of PCSCF domain identifier and CLF device identification or PCSCF domain identifier and RACS device identification; PCSCF domain service interaction unit, to carry out business information mutual with CLF equipment.

When existing a PCSCF equipment corresponding in the system with a plurality of CLF equipment, PCSCF territory memory cell is also stored the corresponding relation of PCSCF domain identifier and CLF device identification, and PCSCF domain service interaction unit sends business information according to the corresponding relation of this PCSCF domain identifier and CLF device identification to corresponding C LF equipment.

In system, exist a PCSCF equipment and a plurality of RACS equipment at once, PCSCF territory memory cell is also stored the corresponding relation of PCSCF domain identifier and RACS device identification, and PCSCF domain service interaction unit sends the resource control strategy according to the corresponding relation of this PCSCF domain identifier and RACS device identification to corresponding RACS equipment.

NACF equipment comprises NACF territory allocation units and NACF territory memory cell; Described NACF territory allocation units are for the user terminal distributing IP, generate the NACF domain identifier of user terminal and the IP and the NACF domain identifier of described user terminal are provided to CLF equipment; Described NACF territory memory cell, the IP and the NACF domain identifier of storage user terminal.

More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.

Claims

1. the method for an identifying subscriber terminal is applied to comprise at least the system of connectivity session positioning function CLF equipment and Proxy Call Session Control Function PCSCF equipment, it is characterized in that, comprises the steps:

2. the method for identifying subscriber terminal according to claim 1 is characterized in that the step that described CLF equipment obtains the PCSCF domain identifier of user terminal specifically comprises:

Network access configuration function NACF equipment is provided with the NACF domain identifier for the IP address pool of its management;

Described CLF equipment obtains the NACF domain identifier of described user terminal;

The NACF territory that described CLF equipment query sets in advance and the corresponding relation in PCSCF territory;

Described CLF equipment obtains the PCSCF domain identifier of described user terminal according to the corresponding relation in described NACF territory and PCSCF territory.

3. as the method for identifying subscriber terminal as described in the claim 2, it is characterized in that described CLF equipment obtains the NACF domain identifier of described user terminal according to the IP address pool at the place, IP address of NACF equipment under the described user terminal and described user terminal.

4. the method for identifying subscriber terminal according to claim 1 is characterized in that the step that described PCSCF equipment obtains the PCSCF domain identifier of described user terminal specifically comprises:

Described PCSCF equipment sets in advance scope and/or the scope of source port and the corresponding relation in PCSCF territory of described service request source address;

Described PCSCF equipment is inquired about scope and/or the scope of source port and the corresponding relation in PCSCF territory of the described source address that sets in advance according to the source address or the source port of the described service request of receiving, obtains the PCSCF domain identifier of described user terminal.

5. the method for identifying subscriber terminal according to claim 1 is characterized in that the step that described PCSCF equipment obtains the IP address of described user terminal specifically comprises:

Described PCSCF equipment and Border Gateway Function BGF equipment carry out alternately, obtain the source IP address or the contact Contact field of the user terminal that sends described service request;

Described PCSCF equipment obtains described user terminal IP address according to the header field of described source IP address or described Contact field.

6. as the method for identifying subscriber terminal as described in the claim 5, it is characterized in that described PCSCF equipment specifically comprises according to the step that the header field of described Contact field obtains the IP address of user terminal:

When the header field of described Contact field is the IP address, described PCSCF equipment directly with it as described user terminal IP address;

When the header field of described Contact field was fully qualified domain name FQDN, described PCSCF equipment obtained described user terminal IP address by the domain name server dns resolution.

7. the method for identifying subscriber terminal according to claim 1 is characterized in that, when having the corresponding a plurality of CLF equipment of a PCSCF equipment in the network, described PCSCF equipment and CLF equipment carry out the mutual step of service message and specifically comprises:

The PCSCF domain identifier that described PCSCF equipment query sets in advance and the corresponding relation of CLF device identification;

Described PCSCF equipment sends service message according to the PCSCF domain identifier of described user terminal to the CLF of correspondence equipment.

8. the method for identifying subscriber terminal according to claim 1 is characterized in that, when having the corresponding a plurality of NACF equipment of a CLF equipment in the network, the step that described CLF equipment obtains the NACF domain identifier of described user terminal specifically comprises:

Different NACF equipment is provided with different NACF domain identifiers for the IP address pool of its management;

Described CLF equipment sets in advance the corresponding relation of NACF domain identifier and NACF device address;

The corresponding relation of described NACF domain identifier that sets in advance of described CLF equipment query and NACF device address;

Described CLF equipment obtains and stores the NACF domain identifier of described user terminal from the NACF equipment of correspondence.

9. the method for identifying subscriber terminal according to claim 1 is characterized in that, also comprises: described CLF equipment sends the information of user terminal to accommodation control subsystem RACS equipment; When having the corresponding a plurality of RACS equipment of a CLF equipment in the network, described CLF equipment specifically comprises to the step that RACS equipment sends the information of user terminal:

The corresponding relation of PCSCF domain identifier that described CLF equipment query sets in advance and described RACS device address;

Described CLF equipment sends the IP address and the information of described user terminal to the RACS of correspondence equipment.

10. the method for identifying subscriber terminal according to claim 1 is characterized in that also comprise: described CLF equipment is to the information of user access authorization function UAAF equipment query user terminal; When having the corresponding a plurality of UAAF equipment of a CLF equipment in the network, described CLF equipment specifically comprises to the step of the information of UAAF equipment query user terminal:

NACF equipment in the network is provided with the NACF domain identifier for the IP address pool of its management;

The NACF domain identifier that described CLF equipment query sets in advance and the corresponding relation of UAAF device address;

Described CLF equipment is to the information of the described user terminal of the UAAF of correspondence equipment query.

11. the method for identifying subscriber terminal is characterized in that according to claim 1, also comprises: home domain CLF equipment obtains the accessing position information of user terminal to visit territory CLF equipment; When having the corresponding a plurality of visits of home domain CLF equipment territory CLF equipment in the network, described home domain CLF equipment specifically comprises to the step that visit territory CLF equipment obtains the accessing position information of user terminal:

NACF domain identifier that home domain CLF equipment query sets in advance and the corresponding relation of visiting CLF device address, territory;

Described home domain CLF equipment is to the visit territory of correspondence CLF equipment query and obtain the accessing position information of described user terminal.

12. the method for identifying subscriber terminal is characterized in that according to claim 1, also comprises: PCSCF equipment sends the resource control strategy to RACS equipment; When having the corresponding a plurality of RACS equipment of a PCSCF equipment in the network, described PCSCF equipment specifically comprises to the step that RACS equipment sends the resource control strategy:

The PCSCF domain identifier that described PCSCF equipment query sets in advance and the corresponding relation of RACS device identification;

Described PCSCF equipment sends the resource control strategy to the RACS of correspondence equipment.

13. the system of an identifying subscriber terminal comprises PCSCF equipment, CLF equipment and NACF equipment, it is characterized in that,

Described CLF equipment obtains the PCSCF domain identifier of described user terminal according to the NACF domain identifier of the user terminal of described NACF equipment generation, with the IP address of described user terminal and the PCSCF domain identifier sign as described user terminal, and it is mutual to utilize the sign of described user terminal and described PCSCF equipment to carry out business information;

Described PCSCF equipment is provided with the corresponding relation in service request source address scope and PCSCF territory, obtain the IP address of user terminal and PCSCF domain identifier sign, and it is mutual to utilize the sign of described user terminal and described CLF equipment to carry out business information as described user terminal;

14. the system as identifying subscriber terminal as described in the claim 13 is characterized in that described CLF equipment comprises correspondence relation storage and CLF domain service interaction unit,

Described correspondence relation storage, storage NACF territory and the corresponding relation in PCSCF territory, NACF domain identifier, IP address and the PCSCF domain identifier of user terminal, and the sign that the IP address and the PCSCF domain identifier of described user terminal is stored as described user terminal;

Described CLF domain service interaction unit, obtain the IP address and the NACF domain identifier of user terminal, obtain the PCSCF domain identifier of described user terminal according to described NACF domain identifier, and it is mutual to carry out business information according to the sign of the described user terminal of described correspondence relation storage storage and described PCSCF equipment.

15. system as identifying subscriber terminal as described in the claim 14, it is characterized in that, when existing a CLF equipment corresponding in the system with a plurality of NACF equipment, described correspondence relation storage is also stored the corresponding relation of NACF domain identifier and NACF device address, and described CLF domain service interaction unit obtains the NACF domain identifier of described user terminal from corresponding N ACF equipment according to described corresponding relation.

16. system as identifying subscriber terminal as described in the claim 14, it is characterized in that, in system, exist a CLF equipment and a plurality of RACS equipment at once, described correspondence relation storage is also stored the corresponding relation of PCSCF domain identifier and RACS device address, and described CLF domain service interaction unit sends the IP address and the information of described user terminal to corresponding RACS equipment according to described corresponding relation.

17. system as identifying subscriber terminal as described in the claim 14, it is characterized in that, in system, exist a CLF equipment and a plurality of UAAF equipment at once, described correspondence relation storage is also stored the corresponding relation of NACF domain identifier and UAAF device address, and described CLF domain service interaction unit is according to the information of described corresponding relation to the described user terminal of corresponding UAAF equipment query.

18. system as identifying subscriber terminal as described in the claim 14, it is characterized in that, when described CLF equipment be home domain CLF equipment and and a plurality of visits territory CLF equipment at once, described correspondence relation storage is also stored the corresponding relation of NACF domain identifier and visit CLF device address, territory, described CLF domain service interaction unit according to described corresponding relation to corresponding visit territory CLF equipment query and obtain the information of described user terminal.

19. the system as identifying subscriber terminal as described in the claim 13 is characterized in that described PCSCF equipment comprises PCSCF territory memory cell and PCSCF domain service interaction unit,

Described PCSCF territory memory cell, the corresponding relation in storage service request source address realm and PCSCF territory, the PCSCF domain identifier of user terminal and IP address; And the sign that the IP address and the PCSCF domain identifier of described user terminal is stored as described user terminal;

Described PCSCF domain service interaction unit, obtain the IP address of user terminal, obtain the PCSCF domain identifier of user terminal according to the service request source address scope of described PCSCF territory cell stores and the corresponding relation in PCSCF territory, and it is mutual to utilize the sign of described user terminal of described PCSCF territory cell stores and described CLF equipment to carry out business information.

20. system as identifying subscriber terminal as described in the claim 19, it is characterized in that, when existing a PCSCF equipment corresponding in the system with a plurality of CLF equipment, described PCSCF territory memory cell is also stored the corresponding relation of PCSCF domain identifier and CLF device identification, and described PCSCF domain service interaction unit sends business information according to described corresponding relation to corresponding C LF equipment.

21. system as identifying subscriber terminal as described in the claim 19, it is characterized in that, in system, exist a PCSCF equipment and a plurality of RACS equipment at once, described PCSCF territory memory cell is also stored the corresponding relation of PCSCF domain identifier and RACS device identification, and described PCSCF domain service interaction unit sends the resource control strategy according to described corresponding relation to corresponding RACS equipment.

22. the system as identifying subscriber terminal as described in the claim 13 is characterized in that described NACF equipment comprises NACF territory allocation units and NACF territory memory cell;

Described NACF territory allocation units are for user terminal distributing IP address, generate the NACF domain identifier of user terminal and the IP address and the NACF domain identifier of the user terminal of described NACF territory cell stores are provided to CLF equipment;

Described NACF territory memory cell, the IP and the NACF domain identifier of storage user terminal.

23. a CLF equipment is characterized in that, comprises correspondence relation storage and CLF domain service interaction unit,

24. as CLF equipment as described in the claim 23, it is characterized in that, when existing a CLF equipment corresponding in the system with a plurality of NACF equipment, described correspondence relation storage is also stored the corresponding relation of NACF domain identifier and NACF device address, and described CLF domain service interaction unit obtains the NACF domain identifier of described user terminal from the NACF equipment of correspondence according to described corresponding relation.

25. as CLF equipment as described in the claim 23, it is characterized in that, in system, exist a CLF equipment and a plurality of RACS equipment at once, described correspondence relation storage is also stored the corresponding relation of PCSCF domain identifier and RACS device address, and described CLF domain service interaction unit sends the IP address and the information of described user terminal to corresponding RACS equipment according to described corresponding relation.

26. as CLF equipment as described in the claim 23, it is characterized in that, in system, exist a CLF equipment and a plurality of UAAF equipment at once, described correspondence relation storage is also stored the corresponding relation of NACF domain identifier and UAAF device address, and described CLF domain service interaction unit is according to the information of described corresponding relation to the described user terminal of corresponding UAAF equipment query.

27. as CLF equipment as described in the claim 23, it is characterized in that, when described CLF equipment be home domain CLF equipment and and a plurality of visits territory CLF equipment at once, described correspondence relation storage is also stored the corresponding relation of NACF domain identifier and visit CLF device address, territory, described CLF domain service interaction unit according to described corresponding relation to corresponding visit territory CLF equipment query and obtain the information of described user terminal.

28. a PCSCF equipment is characterized in that, comprises PCSCF territory memory cell and PCSCF domain service interaction unit,

Described PCSCF domain service interaction unit, obtain the IP address of user terminal, and the corresponding relation that utilizes the service request source address scope of described PCSCF territory cell stores and PCSCF territory obtains the PCSCF domain identifier of user terminal, and it is mutual to utilize the sign of described user terminal and described CLF equipment to carry out business information.

29. as PCSCF equipment as described in the claim 28, it is characterized in that, when existing a PCSCF equipment corresponding in the system with a plurality of CLF equipment, described PCSCF territory memory cell is also stored the corresponding relation of PCSCF domain identifier and CLF device identification, and described PCSCF domain service interaction unit sends business information according to described corresponding relation to corresponding C LF equipment.

30. as PCSCF equipment as described in the claim 28, it is characterized in that, in system, exist a PCSCF equipment and a plurality of RACS equipment at once, described PCSCF territory memory cell is also stored the corresponding relation of PCSCF domain identifier and RACS device identification, and described PCSCF domain service interaction unit sends the resource control strategy according to described corresponding relation to corresponding RACS equipment.