CN101132629A

CN101132629A - Method and system for discovering entrance of call control system

Info

Publication number: CN101132629A
Application number: CNA2007100066047A
Authority: CN
Inventors: 赵元魁; 杜汉美; 庄宏成; 钟琼; 谭拥军; 曾可
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-08-25
Filing date: 2007-01-18
Publication date: 2008-02-27
Anticipated expiration: 2027-01-18
Also published as: CN101132629B

Abstract

This invention discloses a method for finding entrance of call control system including: an authentication grant charge server distributes an address of an entrance point of a call control system for a terminal and sends it to the terminal. This invention also discloses another method for finding entrance of call control system and two kinds of control systems, in which, the authentication grant charge server or HA distributes entrance point addresses of a call control system for terminals and sends the addresses to them not neding the DHCP process or DHCP server interaction terminals.

Description

Find the method and system of entrance of calling control system

Technical field

The present invention relates to the call control system technical field, especially relate to two kinds of method and two kinds of systems that find entrance of calling control system that find entrance of calling control system.

Background technology

The subsystem of IP Multimedia System (IMS) the support IP multimedia service that to be third generation collaborative project (3GPP) propose at Release 5 versions, its outstanding feature be adopted initial session protocol (SIP) and with the independence that inserts.The frame structure of the IMS of 3GPP definition comprises Call Control Functional Entity (Call Server Control Function, CSCF), MGCF entity (Media Gateway Control Function, MGCF), IP Multimedia System media gateway (IMS-Media Gateway, IMS-MGW), Multimedia Resource Function controlled entity (MultimediaResource Function Controller, MRFC), Multimedia resource function processor (MRFP) (MultimediaResource Function Processor, MRFP) and breakthrough gateway control function entity (BreakoutGateway Control Function, BGCF) etc.Wherein, CSCF is whole server, supports SIP treatment S IP session; P-CSCF is the inlet of terminal access to IMS system, has realized agency among the SIP (Proxy) and user agent (User Agent) function.In IMS system or other call control system, system entry also can be a sip agent.Below be the IMS system with the call control system, enter the mouth for P-CSCF be that example describes.

Figure 1 shows that Access Network is the network architecture under user's roaming condition of WiMAX, wherein P-CSCF is unique inlet that the calling party terminal sends all sip messages.Therefore before sending sip message, terminal must be known the address of P-CSCF.

In the prior art, the terminal address that obtains P-CSCF alternately by DHCP (DHCP) and Dynamic Host Configuration Protocol server.Idiographic flow comprises the steps: as shown in Figure 2

In step 201, terminal sends DHCP to DHCP relay (DHCP Relay) and finds (DHCPDiscover) message, in step 202, DHCP relay is transmitted to Dynamic Host Configuration Protocol server with dhcp discover message, then in step 203 and step 204, Dynamic Host Configuration Protocol server sends to DHCP relay with the address setting of P-CSCF in dhcp response message loyalty, and DHCP relay provides (DHCP Offer) message to send to terminal by DHCP the P-CSCF address of the dhcp response message loyalty of reception.

In the WiMAX system, the network insertion of terminal and mobile management are realized by client mobile IP (CMIP) and proxy-mobile IP (PMIP) dual mode.Adopt under the PMIP scene in terminal, when the PMIP client was exercised relay function, the registration of mobile IP and dhcp process were independent respectively, so terminal can be obtained the P-CSCF address by the flow process of above-mentioned prior art; And when the PMIP client was exercised agent functionality, registration and the dhcp process of mobile IP combined, and do not relate to Dynamic Host Configuration Protocol server, therefore can't obtain the P-CSCF address by above-mentioned prior art.In CMIP, do not comprise dhcp process, therefore can't obtain the P-CSCF address yet by above-mentioned prior art.

Summary of the invention

In view of this, main purpose of the present invention is to provide two kinds to find the method for entrance of calling control system and the systems of two kinds of discovery entrance of calling control system, can make the discovery of entrance of calling control system more flexible.

First aspect for achieving the above object the invention provides a kind of method of finding entrance of calling control system, and this method comprises:

The authentication and authorization charging aaa server is a terminal distribution entrance of calling control system dot address, and will be handed down to described terminal for the entrance of calling control system dot address of terminal distribution.

Preferably, pre-configured entrance of calling control system dot address in the described aaa server, and be terminal distribution entrance of calling control system dot address according to the entrance of calling control system dot address that disposes in self.

Described aaa server will be handed down to described terminal and can comprise for the entrance of calling control system dot address of terminal distribution:

Aaa server will be handed down to described terminal for the entrance of calling control system dot address of terminal distribution by intermediate NE.

Described aaa server can will be handed down to described terminal for the entrance of calling control system dot address of terminal distribution according to the entrance of calling control system dot address request indication that comprises in the message from described intermediate NE.

Described aaa server will be handed down to described terminal by intermediate NE and can comprise for the entrance of calling control system dot address of terminal distribution:

A11, aaa server is a terminal distribution entrance of calling control system dot address in Extensible Authentication Protocol EAP verification process, and will be handed down to the authenticator for the entrance of calling control system dot address of terminal distribution;

A12, the dynamic host configuration protocol DHCP entity that is in the same physical entity with described authenticator are handed down to described terminal with described entrance of calling control system dot address from aaa server.

Described aaa server is the ownership aaa server of terminal, or is the visit aaa server of terminal.

In the steps A 12, described DHCP entity can be handed down to terminal with described entrance of calling control system dot address from aaa server according to the request of terminal.

Described terminal can be passed through dhcp discover message, or the DHCP request message is to authenticator's acquisition request entrance of calling control system dot address;

Then described authenticator's correspondence gives information by DHCP, or dhcp response message is handed down to this terminal with the entrance of calling control system dot address of this terminal.

Described aaa server will be handed down to described terminal by intermediate NE and also comprise for the entrance of calling control system dot address of terminal distribution:

A21, in the EAP verification process, aaa server is a terminal distribution entrance of calling control system dot address, and will be handed down to the authenticator for the entrance of calling control system dot address of terminal distribution;

A22, Access Network gateway obtain the entrance of calling control system dot address of the terminal of authenticator's reception, and this entrance of calling control system dot address is handed down to described terminal by broadcast.

External agent's broadcast that described broadcast can send for: external agent, or the advertising of route message of couple in router broadcasting.

If described terminal adopts client mobile Internet Protocol CMIP, then described aaa server will be handed down to described terminal by intermediate NE and can comprise for the entrance of calling control system dot address of terminal distribution:

A31, in the mobile IP registration process, aaa server is a terminal distribution entrance of calling control system dot address, and will be handed down to the home agent of terminal for the entrance of calling control system dot address of terminal distribution;

The home agent of A32, terminal is handed down to terminal with described entrance of calling control system dot address by the mobile IP registration response message.

If described terminal adopts and acts on behalf of mobile Internet Protocol PMIP, then described aaa server will be handed down to described terminal by intermediate NE and can comprise for the entrance of calling control system dot address of terminal distribution:

A41, in the mobile IP registration process, aaa server is a terminal distribution entrance of calling control system dot address, and will send to the PMIP client of terminal for the entrance of calling control system dot address of terminal distribution by the home agent of terminal;

A42, be in DHCP proxy in the same physical entity with the PMIP client and described entrance of calling control system dot address is given information by DHCP be handed down to terminal.

A51, aaa server is a terminal distribution entrance of calling control system dot address in the initial access authentication process, and will be handed down to the Access Network gateway for the entrance of calling control system dot address of terminal distribution;

A52, described Access Network gateway are handed down to described terminal with the entrance of calling control system dot address that receives.

Preferably, in the described steps A 52, specifically provide the entrance of calling control system dot address that the Access Network gateway is received of receiveing the response to be handed down to described terminal by information by the couple in router on the Access Network gateway.

Described call control system can be IP Multimedia System; Described entrance of calling control system point is: proxy-call session control function entity P-CSCF or initial session protocol sip agent.

Described entrance of calling control system dot address can for: call out the IP address list of entrance, perhaps be: call out the domain name tabulation of entrance and the IP address of address analyzing server DNS.

Second aspect for achieving the above object the invention provides a kind of system that finds entrance of calling control system, and this system comprises: terminal and aaa server;

Wherein, aaa server is a terminal distribution entrance of calling control system dot address, and will be handed down to described terminal for the entrance of calling control system dot address of terminal distribution.

Further can comprise in the described system: intermediate NE;

Then described aaa server will be handed down to described terminal for the entrance of calling control system dot address of terminal distribution by described intermediate NE; Perhaps described aaa server will be handed down to described terminal according to the request of indicating from the entrance of calling control system dot address request of carrying of described intermediate NE for the entrance of calling control system dot address of terminal distribution by described intermediate NE.

Described intermediate NE comprises: authenticator and DHCP entity; Perhaps comprise: authenticator and Access Network gateway; Perhaps comprise: home agent; Perhaps comprise: home agent, PMIP client and DHCP proxy; Perhaps comprise: the Access Network gateway.

Described call control system can be IP Multimedia System.

The 3rd aspect for achieving the above object the invention provides a kind of method of finding entrance of calling control system, and this method comprises:

Home agent is a terminal distribution entrance of calling control system dot address, and will be handed down to described terminal for the entrance of calling control system dot address of terminal distribution.

Can pre-configured entrance of calling control system dot address in the described home agent, then described home agent is a terminal distribution entrance of calling control system dot address according to entrance of calling control system dot address pre-configured in self.

If described terminal adopts CMIP, then can be in the mobile IP registration process, home agent is according to the entrance of calling control system dot address request indication that carries in the mobile IP login request message of self terminal, be terminal distribution entrance of calling control system dot address, and will be handed down to terminal by the mobile IP registration response message for the entrance of calling control system dot address of terminal distribution.

If described terminal adopts PMIP, then can be in the mobile IP registration process, home agent is according to the entrance of calling control system dot address request indication of carrying in the mobile IP login request message from the PMIP client, be terminal distribution entrance of calling control system dot address, and will be the entrance of calling control system dot address of terminal distribution, send to the PMIP client of terminal by the mobile IP registration response message;

Then being in DHCP proxy in the same physical entity with the PMIP client gives information described entrance of calling control system dot address and is handed down to terminal by DHCP.

The 4th aspect for achieving the above object the invention provides a kind of system that finds entrance of calling control system, and this system comprises:

Terminal and home agent; Wherein, home agent is a terminal distribution entrance of calling control system dot address, and will be handed down to described terminal for the entrance of calling control system dot address of terminal distribution.

Further can comprise in the described system: PMIP client and be arranged in the DHCP proxy of same physical entity with the PMIP client;

Then described home agent is according to the entrance of calling control system dot address request indication of carrying in the mobile IP login request message from the PMIP client, be terminal distribution entrance of calling control system dot address, and will be the entrance of calling control system dot address of terminal distribution, send to the PMIP client of terminal by the mobile IP registration response message;

The entrance of calling control system dot address that DHCP proxy receives described PMIP client gives information by DHCP and is handed down to terminal.

From such scheme as can be seen, among the present invention, by authentication and authorization charging server or home agent is terminal distribution entrance of calling control system dot address, and will be handed down to terminal for the entrance of calling control system dot address of terminal distribution, make and need not to carry out dhcp process and the Dynamic Host Configuration Protocol server interactive terminal also can obtain the entrance of calling control system dot address, realized that thereby terminal obtains the address of calling out the entrance more neatly and find to call out inlet, and because aaa server or home agent unified management and distribution entrance of calling control system dot address are more convenient for to the centralized management of entrance of calling control system point.

Description of drawings

Fig. 1 for IMS system institute based on Access Network be WiMAX network of network composition schematic diagram;

Fig. 2 is the flow chart of terminal to obtain P-CSCF address in the prior art;

Fig. 3 is that the system of first embodiment of the invention forms schematic diagram;

Fig. 4 is the flow chart of terminal to obtain P-CSCF address in the first embodiment of the invention;

Fig. 5 is that the system of second embodiment of the invention forms schematic diagram;

Fig. 6 is the flow chart of terminal to obtain P-CSCF address in the second embodiment of the invention;

Fig. 7 is that the system of third embodiment of the invention forms schematic diagram;

Fig. 8 is the flow chart of terminal to obtain P-CSCF address in the third embodiment of the invention;

Fig. 9 is that the system of fourth embodiment of the invention forms schematic diagram;

Figure 10 is the flow chart of terminal to obtain P-CSCF address in the fourth embodiment of the invention;

Figure 11 is that the system of fifth embodiment of the invention forms schematic diagram;

Figure 12 is the flow chart of terminal to obtain P-CSCF address in the fifth embodiment of the invention;

Figure 13 is that the system of sixth embodiment of the invention forms schematic diagram;

Figure 14 is the flow chart of terminal to obtain P-CSCF address in the sixth embodiment of the invention;

Figure 15 is that the system of seventh embodiment of the invention forms schematic diagram;

Figure 16 is the flow chart of terminal to obtain P-CSCF address in the seventh embodiment of the invention.

Figure 17 is that the system of eighth embodiment of the invention forms schematic diagram;

Figure 18 is the flow chart of terminal to obtain P-CSCF address in the eighth embodiment of the invention.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.

Main thought of the present invention is, is terminal distribution entrance of calling control system dot address by aaa server or HA, and will be handed down to terminal for terminal distribution entrance of calling control system dot address.

Aaa server or HA can directly be handed down to terminal with the entrance of calling control system dot address that disposes in self among the present invention, also the entrance of calling control system dot address that disposes in self can be handed down to other network elements after, be handed down to terminal by other network elements; Perhaps initiate request, the entrance of calling control system dot address is handed down to terminal by aaa server, HA or other network elements by terminal request.Make terminal obtain the entrance of calling control system dot address in this way, make the discovery flexibility more of entrance of calling control system, be convenient to centralized control, and be applicable to and do not adopt DHCP mechanism to obtain the network of IP address.

Above-mentioned entrance of calling control system point can be P-CSCF, also can be sip agent (SIPPROXY).Below be that P-CSCF is that example describes with the entrance of calling control system point.

The present invention can be applied in the various application scenarios, below by the present invention is described in more detail as specific embodiment in several different scenes that are applied in the WiMAX system.

The present invention be applied in terminal adopt under the PMIP scene and terminal to obtain the P-CSCF address by dhcp process be the first embodiment of the present invention.Present embodiment is in Extensible Authentication Protocol (EAP) verification process, aaa server is handed down to authenticator (Authenticator) with the address of the P-CSCF that disposes in self, in dhcp process terminal is handed down in the P-CSCF address from aaa server among the authenticator by the PMIP client again.

Present embodiment based on system as shown in Figure 3, comprise terminal, DHCP entity, authenticator and aaa server, the DHCP entity here can be DHCP proxy or DHCP relay, below is written as DHCP proxy/relaying.Wherein, terminal is used for initiating the EAP identifying procedure by the authenticator to aaa server, and after the EAP authentication is finished, obtains the P-CSCF address by the DHCP flow process to DHCP proxy/relay request; DHCP proxy/relaying is used for obtaining the P-CSCF address according to the request of terminal from the authenticator and sends to terminal; The authenticator is used for alternately terminal being authenticated with aaa server, and obtains the P-CSCF address from aaa server; Aaa server is used for terminal is authenticated, and distributes P-CSCF according to the P-CSCF address information that disposes in self for the user, and the authenticator is handed down in the P-CSCF address of distributing.

Under roaming scence, present embodiment based on system in comprise ownership AAA (H-AAA) server and visit AAA (V-AAA) server, then according to the agreement between operator, if distribute the P-CSCF address by home network, be that the user distributes P-CSCF according to the P-CSCF address information that disposes in self then, and the authenticator is handed down to by the V-AAA server in the P-CSCF address of distributing by the H-AAA server; If distribute the P-CSCF address, be that the user distributes P-CSCF according to the P-CSCF address information that disposes in self then, and the authenticator is handed down in the P-CSCF address of distributing by the V-AAA server by visited network.

To be example under roaming scence, the flow process of terminal discovery P-CSCF address comprises the steps: as shown in Figure 4 in the present embodiment

Step 401～step 402, in the EAP verification process, terminal sends the EAP authentication message to the authenticator, the authenticator is according to the EAP authentication message of coming self terminal, sends the EAP authentication request by the V-AAA server to the H-AAA of terminal server.

Step 403, H-AAA server authenticate terminal, and send the authentication relevant parameter by the V-AAA server to the authenticator.Here, according to the agreement between operator, if distribute P-CSCF, be that the user distributes P-CSCF according to the P-CSCF address information that disposes in self then, and the authenticator is handed down to by the V-AAA server in the P-CSCF address of distributing by the H-AAA server by home network; If distribute the P-CSCF address by visited network, be that the user distributes P-CSCF according to the P-CSCF address information that disposes in self then by the V-AAA server, and when transmitting the authentication relevant parameter, this V-AAA server together is handed down to the authenticator for the P-CSCF address that the user distributes.

Step 404, behind the EAP authentication success, the authenticator sends EAP authentication success message to terminal.

Step 405, in dhcp process, terminal is provided with in the request message that sends to DHCP proxy/relaying and comprises the indication of P-CSCF Address requests, acquisition request P-CSCF address information.The request message here can be the dhcp discover message in the DHCP discovery procedure, also can be the DHCP request message in the DHCP request process.

Step 406, DHCP proxy/relaying are handed down to terminal by corresponding response message with the P-CSCF address that the authenticator obtains after receiving the request message that comprises the indication of P-CSCF Address requests.Here, if the request message in the step 405 is a dhcp discover message, then the response message here is that DHCP gives information; If the request message in the step 405 is DHCP request (Request) message, then the response message here is dhcp response (Ack) message.

In the present embodiment, terminal can not carried the indication of P-CSCF Address requests in the dhcp process in the request message that DHCP proxy/relaying sends, and then DHCP proxy/relay straight connected that DHCP gives information or dhcp response message initiatively is handed down to terminal with the P-CSCF address that the authenticator obtains.

In the present embodiment, content included in the EAP message with carrying P-CSCF address between H-AAA, V-AAA and Access Network is as shown in table 1, as can be seen from Table 1, EAP message in the present embodiment has increased last two on existing EAP message basis: P-CSCF and DNS, wherein P-CSCF is IP address list or the domain name addresses tabulation that sends to authenticator's P-CSCF, when DNS is used for being domain name addresses in P-CSCF item address, the IP address of DNS is provided, obtains the IP address to be used for the domain name addresses of P-CSCF resolved.

Attribute (Attribute)	Describe (Description)
Attribute (Attribute)	Describe (Description)	EAP-Message	EAP message
Message-Authenticator	Authenticated domain	EAP-Message	EAP message
Message-Authenticator	Authenticated domain	WiMAX-Capability	The certain capabilities of WiMAX
MN-HA-KEY	The encryption key of MN and HA	WiMAX-Capability	The certain capabilities of WiMAX
MN-HA-KEY	The encryption key of MN and HA	MN-FA-KEY	The encryption key of MN and FA
FA-HA-KEY	The encryption key of MN and FA	MN-FA-KEY	The encryption key of MN and FA
FA-HA-KEY	The encryption key of MN and FA	MN-HA-IP	The address of HA
MN-HOA	The home address of MS	MN-HA-IP	The address of HA
MN-HOA	The home address of MS	MSK	Master key
DHCP	The Dynamic Host Configuration Protocol server address	MSK	Master key
DHCP	The Dynamic Host Configuration Protocol server address	P-CSCF	The IP address list of P-CSCF or domain name addresses tabulation
DNS	If the address of P-CSCF is a domain name addresses, need the IP address of DNS so	P-CSCF

Table 1

In above-mentioned first embodiment, aaa server is handed down to the authenticator by the EAP verification process with the P-CSCF address that disposes in self, and terminal is obtained the P-CSCF address by dhcp process again.In the second embodiment of the present invention, aaa server still is handed down to the authenticator by the EAP verification process with the P-CSCF address that disposes in self, but after this sends the P-CSCF address by broadcast to terminal.

Be illustrated in figure 5 as present embodiment based on system form schematic diagram, wherein on the basis of system shown in Figure 3, increase the Access Network gateway and do not comprise DHCP proxy/relaying.The Access Network gateway that increases is used for the information structuring routing broadcast message according to authenticator, and increases the P-CSCF address information that authenticator obtains in routing broadcast message from aaa server; Then terminal is obtained the P-CSCF address information from the broadcast that the Access Network gateway sends except that carrying out the EAP identifying procedure; The authenticator performed with mutual and first embodiment other entities in identical.The Access Network gateway here can be that the external agent among the IPv4 also can be the couple in router among the IPv6, and then Dui Ying routing broadcast message is external agent's broadcast or advertising of route message.

In the present embodiment, increase as the scaling option cell in the table 2 in routing broadcast message, wherein option type (Option type) field can take 8 bit space; Option (Option length) field can take 8 bit space, is used to identify the length of P-CSCF address field; P-CSCF address (P-CSCF Address) field can take 128 byte spaces.

Option type

Option length

P-CSCF Address

Table 2

The flow process of present embodiment as shown in Figure 6, wherein the included step 601 of EAP verification process is identical to step 404 with step 401 among Fig. 4 to step 604, in step 605, Access Network gateway structure comprises the routing broadcast message of P-CSCF address, and this message broadcasted, then terminal receives this broadcast and can obtain the P-CSCF address.

The present invention is applied under the terminal employing CMIP scene and is terminal distribution and is issued the P-CSCF address by aaa server, is the third embodiment of the present invention.In the present embodiment, the P-CSCF address that aaa server disposes in self in mobile IP request flow process sends to terminal by home agent.

Present embodiment based on system as shown in Figure 7, comprise terminal, home agent and aaa server.Wherein, terminal is used for sending the mobile IP login request of carrying the indication of P-CSCF Address requests to home agent, and the mobile IP registration response message that carries the P-CSCF address that receives from home agent obtains the P-CSCF address; Home agent is used to receive the MIP register requirement of self terminal, and initiates request to authentification of user to aaa server, and aaa server is sent to terminal by the P-CSCF address that authentication response issues by the MIP registration reply message; The request to authentification of user that aaa server is used to receive from home agent authenticates the user, and the P-CSCF address that disposes in self is sent to home agent by authentication response.

Under roaming scence, the Foreign Agent that further comprises terminal in the system of present embodiment and connected, then Foreign Agent is used for transmitting request and response message between terminal and home agent.

To be example under roaming scence, the flow process of terminal discovery P-CSCF address comprises the steps: as shown in Figure 8 in the present embodiment

Step 801, Foreign Agent to terminal advertisement, make terminal obtain the address (CoA) of Foreign Agent by MIP advertisement (Adv) message.

Step 802, terminal are outwards acted on behalf of and are sent the MIP register requirement, carry network identity NAI, hometown-agent-address (HoA), CoA and P-CSCF Address requests indication information in this request.

Step 803, Foreign Agent are initiated the MIP register requirement to home agent, carry network identity NAI, the HoA, CoA and the P-CSCF Address requests indication information that carry in the MIP login request message in the step 802 in the message.

After step 804, home agent receive the MIP register requirement, send the aaa authentication request to aaa server, the request aaa server authenticates and requires to obtain relevant information to the user.Can comprise the indication of P-CSCF Address requests in this request.

Step 805, aaa server return the aaa authentication response message to home agent after receiving MIP register requirement from home agent, comprise the P-CSCF address that disposes in this aaa server self in this message.

The mobile IP login information that step 806, home agent response Foreign Agent are initiated comprises the P-CSCF address of being distributed in the MIP registration reply message.

Step 807, Foreign Agent return the MIP response message to the MIP register requirement that terminal is initiated, and comprise the P-CSCF address that aaa server distributes in the message.

In the present embodiment, in the mentioned MIP login request message of step 802 and step 803, can increase a cell (IE) respectively, as the indication of P-CSCF Address requests, marking terminal requires to obtain the P-CSCF address.The cell format that increases can be as shown in table 3, type (Type) value representation P-CSCF Address requests wherein, and data (data) territory be a sky, length (length) field is used to refer to the shared space size in data territory.Then in the MIP registration reply message that step 806 is mentioned to the step 807, increase cell accordingly and carry the P-CSCF address message, the cell that increases is identical with table 3 structure, Type value wherein is the same with the Type value of the request message of correspondence, the data territory is the IP address list of the P-CSCF that distributes, perhaps tabulates (domain name list) for domain name and the IP address of DNS.

Type

length

data

Table 3

In the present embodiment, to the expansion of AAA request message and AAA response message can with first embodiment in identical, on existing EAP message basis, increase the P-CSCF attribute, or further increase the DNS attribute.

The present invention is applied under the terminal employing CMIP scene and is terminal distribution and is issued the P-CSCF address by HA, is the fourth embodiment of the present invention.In the present embodiment, the P-CSCF address that the HA of terminal disposes in self in mobile IP request flow process sends to terminal.

Present embodiment based on system as shown in Figure 9, comprise terminal and home agent.Wherein, terminal is used for sending the mobile IP login request of carrying the indication of P-CSCF Address requests to home agent, and the mobile IP registration response message that carries the P-CSCF address that receives from home agent obtains the P-CSCF address; The P-CSCF address that home agent is used for receiving the MIP register requirement of self terminal to dispose according to self, and will send to terminal by the MIP registration reply message for the P-CSCF address of terminal distribution.

Being example under roaming scence, the flow process of terminal discovery P-CSCF address as shown in figure 10 in the present embodiment, wherein, step 1001 is identical to step 803 with step 801 among Fig. 8 to step 1003, in step 1004, after home agent receives the MIP register requirement, according to the P-CSCF address that disposes in self is terminal distribution P-CSCF address, and will send to Foreign Agent by the MIP registration reply message for the P-CSCF address of terminal distribution, in step 1005, Foreign Agent returns the MIP response message at the MIP register requirement that terminal is initiated, and comprising HA in the message is the P-CSCF address of terminal distribution.

In the present embodiment, the form of MIP login request message and MIP response message can with the 3rd embodiment in identical.

The present invention be applied in terminal adopt under the PMIP scene and terminal by being combined in dhcp process and the mobile IP registration process in the same flow process, obtaining aaa server is the fifth embodiment of the present invention for its distribution P-CSCF address.In the present embodiment, by the mobile IP request flow process that combines with dhcp process, aaa server sends to terminal with the P-CSCF address that disposes in self by home agent.

Present embodiment based on system as shown in figure 11, comprise terminal, DHCP proxy, PMIP client, home agent and aaa server.Wherein, terminal is used for sending the DHCP that carries P-CSCF Address requests indication information to DHCP proxy and finds request, and the DHCP that carries the P-CSCF address information that the reception DHCP proxy returns gives information; DHCP proxy is used for finding that according to the DHCP of terminal request triggers the PMIP client and sends the mobile IP login request of carrying the indication of P-CSCF Address requests to home agent, and the P-CSCF address that the PMIP client provides given information by DHCP sends to terminal; The PMIP client is used for sending the mobile IP login request of carrying P-CSCF Address requests indication information to home agent, and receive the mobile IP registration response message that carries the P-CSCF address, and P-CSCF address is wherein offered DHCP proxy from home agent; Home agent is used to receive the MIP register requirement from the PMIP client, and initiates request to authentification of user to aaa server, and aaa server is sent to the PMIP client by the P-CSCF address that authentication response issues by the MIP response; The request to authentification of user that aaa server is used to receive from home agent authenticates the user, and the P-CSCF address that disposes in self is sent to home agent by authentication response.

Under roaming scence, the Foreign Agent that further comprises terminal in the system of present embodiment and connected, then Foreign Agent is used for transmitting request and response message between PMIP client and home agent.

To be example under roaming scence, the flow process of terminal discovery P-CSCF address comprises the steps: as shown in figure 12 in the present embodiment

Step 1201, terminal send the dhcp discover message that has request P-CSCF indication information to DHCP proxy.

Step 1202, DHCP proxy trigger the PMIP client and carry out mobile IP registration, and outwards the agency sends mobile IP login request, comprises P-CSCF Address requests indication information in this request.

Step 1203, Foreign Agent are initiated mobile IP login request to home agent, comprising P-CSCF Address requests indication information.

Step 1204, home agent request aaa server authenticate and require to obtain relevant information to the user, can comprise P-CSCF Address requests indication information in this authentication request.

Step 1205, aaa server authenticate the user after receiving authentication request from home agent, and to home agent return authentication response message, are included as the P-CSCF address that the user distributes in this message.

The mobile IP login information that step 1206, home agent response Foreign Agent are initiated outwards comprises the P-CSCF address that aaa server distributes in the MIP registration reply message that the agency sends

The MIP register requirement that step 1207, Foreign Agent are initiated the PMIP client responds, and comprises the P-CSCF address that aaa server distributes in the MIP registration reply message that the PMIP client sends

Step 1208, PMIP client trigger DHCP proxy transmission DHCP and give information to terminal, and wherein comprising aaa server is the P-CSCF address of terminal distribution.

In the present embodiment, during giving information, dhcp discover message and DHCP can not comprise the DHCP relevant information, then the PMIP client can be carried P-CSCF Address requests indication information voluntarily in the MIP register requirement, thereby obtains the P-CSCF address that aaa server is a terminal distribution.Then terminal can be carried P-CSCF Address requests indication by the DHCP request message, and DHCP proxy is that terminal is handed down in the P-CSCF address of terminal distribution by dhcp response message with aaa server.

In addition, also can not comprise P-CSCF Address requests indication information in above-mentioned each request message, then aaa server initiatively will be handed down to terminal by other network elements in home agent and the native system for the P-CSCF address that this user distributes after to authentification of user.

The present invention be applied in terminal adopt under the PMIP scene and terminal by being combined in dhcp process and the mobile IP registration process in the same flow process, obtaining HA is the sixth embodiment of the present invention for its distribution P-CSCF address.In the present embodiment, by the mobile IP request flow process that combines with dhcp process, HA sends to terminal with the P-CSCF address that disposes in self by home agent.

Present embodiment based on system as shown in figure 13, comprise terminal, DHCP proxy, PMIP client and home agent.Wherein, terminal is used for sending the DHCP that carries P-CSCF Address requests indication information to DHCP proxy and finds request, and the DHCP that carries the P-CSCF address information that the reception DHCP proxy returns gives information; DHCP proxy is used for finding that according to the DHCP of terminal request triggers the PMIP client and sends the mobile IP login request of carrying the indication of P-CSCF Address requests to home agent, and the P-CSCF address that the PMIP client provides given information by DHCP sends to terminal; The PMIP client is used for sending the mobile IP login request of carrying P-CSCF Address requests indication information to home agent, and receive the mobile IP registration response message that carries the P-CSCF address, and P-CSCF address is wherein offered DHCP proxy from home agent; Home agent is used to receive the MIP register requirement from the PMIP client, and is terminal distribution P-CSCF address according to the P-CSCF address that disposes in self, and will for terminal distribution the P-CSCF address send to the PMIP client by the MIP response.

Being example under roaming scence, the flow process of terminal discovery P-CSCF address as shown in figure 14 in the present embodiment, wherein, step 1401 is identical to step 1203 with step 1201 among Figure 12 to step 1403, in step 1404, home agent is terminal distribution P-CSCF address according to the P-CSCF address that disposes in self, and will for terminal distribution the P-CSCF address send to Foreign Agent by the MIP registration reply message.In step 1405, the MIP register requirement that Foreign Agent is initiated the PMIP client responds, send the MIP registration reply message to the PMIP client, comprising HA in this response message is the P-CSCF address of terminal distribution, after this in step 1406, the PMIP client triggers DHCP proxy transmission DHCP and gives information to terminal, and wherein comprising HA is the P-CSCF address of terminal distribution.

In the present embodiment, can not comprise the DHCP relevant information during dhcp discover message and DHCP give information, then the PMIP client can be carried P-CSCF Address requests indication information voluntarily in the MIP register requirement, thereby obtains the P-CSCF address that HA is a terminal distribution.Then terminal can be carried the indication of P-CSCF Address requests by the DHCP request message, and DHCP proxy is handed down to terminal with HA for the P-CSCF address that the user distributes by dhcp response message.

In addition, also can not comprise P-CSCF Address requests indication information in above-mentioned each request message, then HA initiatively will be handed down to terminal by other network elements such as Foreign Agents for the P-CSCF address of terminal distribution in the MIP registration reply message.

Among the present invention, aaa server can also be for the user distributes the P-CSCF address in initial authentication process, and addresses distributed is handed down to terminal by the couple in router in the Access Network gateway.Below by the 7th embodiment this mode of terminal to obtain P-CSCF address that makes is elaborated.

As shown in figure 15, for seventh embodiment of the invention based on system's composition diagram, comprising: terminal (MN), Access Network gateway and H-AAA server.Wherein, terminal is used for carrying out initial access authentication alternately with the Access Network gateway, and after finishing initial access authentication, obtain information request to the transmission of Access Network gateway, and the P-CSCF address is obtained in the information of the obtaining response that comprises the P-CSCF address information that reception Access Network gateway returns; The Access Network gateway is used for carrying out initial access authentication with terminal interaction, send the request of access to H-AAA, and message is accepted in the access of carrying the P-CSCF address that reception H-AAA server returns, store this access and accept information such as P-CSCF address in the message, and receive the response and be handed down to terminal by obtaining information according to the information that information request will comprise the P-CSCF address obtained of terminal; The H-AAA server is used to receive the access request from the Access Network gateway, comprises the relevant information of P-CSCF address for the user distributes according to this request, and the information of distributing is accepted message by access sends to the Access Network gateway.Comprise couple in router in the above-mentioned Access Network gateway, wherein Access Network gateway and terminal interaction obtain information request, the information of obtaining is receiveed the response, specifically by couple in router and terminal interaction.

The flow process of terminal discovery P-CSCF address comprises the steps: as shown in figure 16 in the present embodiment

Step 1601, terminal and Access Network gateway carry out initial access authentication (BeginAccess-Auth) alternately.

Step 1602, Access Network gateway send the request of inserting (Access Request) to H-AAA, and request distributes relevant information.

Step 1603, H-AAA insert request and distribute corresponding information such as HA, HL, and are terminal distribution P-CSCF address information.

Step 1604, H-AAA send to the Access Network gateway by inserting information such as accepting HA, HL that (Access Accept) message will distribute for the user and P-CSCF address.

Information such as HA, HL that step 1605, Access Network gateway stores receive and P-CSCF address.

Step 1606, Access Network gateway and terminal interaction are finished initial access authentication.

Step 1607, the terminal couple in router on the Access Network gateway sends and obtains information request (Information Request), acquisition request relevant information.

Step 1608, couple in router send to terminal with P-CSCF address information and other relevant informations of Access Network gateway stores by obtaining information response (Information Reply) message.

Among the present invention, aaa server can also be for the user distributes the P-CSCF address in initial authentication process, and addresses distributed received the corresponding back of mobile IP registration that home agent returns and will issue portable terminal by the external agent in the Access Network gateway in the mobile IP registration process that portable terminal is initiated before with correspondence obtain or portable terminal is handed down in the address of the P-CSCF of pre-configured this terminal.Below by the 8th embodiment this mode of terminal to obtain P-CSCF address that makes is elaborated.

As shown in figure 17, for eighth embodiment of the invention based on system's composition diagram, comprising: terminal (MN), Access Network gateway and H-AAA server.Wherein, terminal is used for carrying out initial access authentication alternately with the Access Network gateway, and after finishing initial access authentication, obtain information request to the transmission of Access Network gateway, and the P-CSCF address is obtained in the information of the obtaining response that comprises the P-CSCF address information that reception Access Network gateway returns; The Access Network gateway is used for carrying out initial access authentication with terminal interaction, send the request of access to H-AAA, and message is accepted in the access of carrying the P-CSCF address that reception H-AAA server returns, store this access and accept information such as P-CSCF address in the message, and receive the response and be handed down to terminal by obtaining information according to the information that information request will comprise the P-CSCF address obtained of terminal; The H-AAA server is used to receive the access request from the Access Network gateway, comprises the relevant information of P-CSCF address for the user distributes according to this request, and the information of distributing is accepted message by access sends to the Access Network gateway.Comprise couple in router in the above-mentioned Access Network gateway, wherein Access Network gateway and terminal interaction obtain information request, the information of obtaining is receiveed the response, specifically by couple in router and terminal interaction.

The flow process of terminal discovery P-CSCF address comprises the steps: as shown in figure 18 in the present embodiment

Step 1801, external agent by pre-configured or portable terminal go in the network process obtain its P-CSCF address by AAA by its initial authentication process after, Foreign Agent to terminal advertisement, makes terminal obtain the address (CoA) of Foreign Agent by MIP advertisement (Adv) message.

Step 1802, terminal are outwards acted on behalf of and are sent the MIP register requirement, carry network identity NAI, hometown-agent-address (HoA), CoA in this request.

Step 1803, Foreign Agent are initiated the MIP register requirement to home agent, carry network identity NAI, the HoA, the CoA that carry in the MIP login request message in the step 802 in the message.

After step 1804, home agent receive the MIP register requirement, send the aaa authentication request to aaa server, the request aaa server authenticates and requires to obtain relevant information to the user.

Step 1805, aaa server return the aaa authentication response message to home agent after receiving MIP register requirement from home agent.

The mobile IP login information that step 1806, home agent response Foreign Agent are initiated.

Step 1807, Foreign Agent return the MIP response message to the MIP register requirement that terminal is initiated, and comprise the P-CSCF address that aaa server distributes in the message.

More than be explanation, in concrete implementation process, can carry out suitable improvement, to adapt to the concrete needs of concrete condition method of the present invention to the specific embodiment of the invention.Therefore be appreciated that according to the specific embodiment of the present invention just to play an exemplary role, not in order to restriction protection scope of the present invention.

Claims

1. a method of finding entrance of calling control system is characterized in that, this method comprises:

2. method according to claim 1 is characterized in that, pre-configured entrance of calling control system dot address in the aaa server, and be terminal distribution entrance of calling control system dot address according to the entrance of calling control system dot address that disposes in self.

3. method according to claim 1 is characterized in that, described aaa server will be handed down to described terminal and comprise for the entrance of calling control system dot address of terminal distribution:

4. method according to claim 3, it is characterized in that, described aaa server will be handed down to described terminal for the entrance of calling control system dot address of terminal distribution according to the entrance of calling control system dot address request indication that comprises in the message from described intermediate NE.

5. method according to claim 3 is characterized in that, described aaa server will be handed down to described terminal by intermediate NE and comprise for the entrance of calling control system dot address of terminal distribution:

6. method according to claim 5 is characterized in that, described aaa server is the ownership aaa server of terminal, or is the visit aaa server of terminal.

7. method according to claim 5 is characterized in that, in the steps A 12, described DHCP entity is handed down to terminal according to the request of terminal with described entrance of calling control system dot address from aaa server.

8. method according to claim 7 is characterized in that, described terminal is by dhcp discover message, or the DHCP request message is to authenticator's acquisition request entrance of calling control system dot address;

9. method according to claim 3 is characterized in that, described aaa server will be handed down to described terminal by intermediate NE and comprise for the entrance of calling control system dot address of terminal distribution:

10. method according to claim 9 is characterized in that, described broadcast is: external agent's broadcast that the external agent sends, or the advertising of route message of couple in router broadcasting.

11. method according to claim 3 is characterized in that, described terminal adopts client mobile Internet Protocol CMIP, and then described aaa server will be handed down to described terminal by intermediate NE and comprise for the entrance of calling control system dot address of terminal distribution:

12. method according to claim 3 is characterized in that, described terminal adopts and acts on behalf of mobile Internet Protocol PMIP, and then described aaa server will be handed down to described terminal by intermediate NE and comprise for the entrance of calling control system dot address of terminal distribution:

13. method according to claim 3 is characterized in that, described aaa server will be handed down to described terminal by intermediate NE and comprise for the entrance of calling control system dot address of terminal distribution:

14. method according to claim 13 is characterized in that, in the described steps A 52, specifically provides the entrance of calling control system dot address that the Access Network gateway is received of receiveing the response to be handed down to described terminal by the couple in router on the Access Network gateway by information.

15. method according to claim 3 is characterized in that, described terminal adopts client mobile Internet Protocol CMIP, and then described aaa server will be handed down to described terminal by intermediate NE and comprise for the entrance of calling control system dot address of terminal distribution:

A61, in the mobile IP registration process, aaa server is a terminal distribution entrance of calling control system dot address, and will be handed down to authenticator or IAD or external agent in the Access Network for the entrance of calling control system dot address of terminal distribution;

A62, described authenticator or IAD or external agent are handed down to terminal with described entrance of calling control system dot address by the mobile IP registration response message.

16., it is characterized in that described call control system is an IP Multimedia System according to arbitrary described method in the claim 1 to 15; Described entrance of calling control system point is: proxy-call session control function entity P-CSCF or initial session protocol sip agent.

17. according to arbitrary described method in the claim 1 to 15, it is characterized in that, described entrance of calling control system dot address is: call out the IP address list of entrance, perhaps be: call out the domain name tabulation of entrance and the IP address of address analyzing server DNS.

18. a system that finds entrance of calling control system is characterized in that, this system comprises: terminal and aaa server; Wherein, aaa server is a terminal distribution entrance of calling control system dot address, and will be handed down to described terminal for the entrance of calling control system dot address of terminal distribution.

19. system according to claim 18 is characterized in that, further comprises in the described system: intermediate NE;

20. system according to claim 19 is characterized in that, described intermediate NE comprises: authenticator and DHCP entity; Perhaps comprise: authenticator and Access Network gateway; Perhaps comprise: home agent; Perhaps comprise: home agent, PMIP client and DHCP proxy; Perhaps comprise: the Access Network gateway; Perhaps comprise: authenticator and external agent; Perhaps comprise the external agent.

21., it is characterized in that described call control system is an IP Multimedia System according to arbitrary described system in the claim 18 to 20.

22. a method of finding entrance of calling control system is characterized in that, this method comprises:

23. method according to claim 22, it is characterized in that, pre-configured entrance of calling control system dot address in the described home agent, then described home agent is a terminal distribution entrance of calling control system dot address according to entrance of calling control system dot address pre-configured in self.

24. method according to claim 22, it is characterized in that, described terminal adopts CMIP, then in the mobile IP registration process, home agent is according to the entrance of calling control system dot address request indication that carries in the mobile IP login request message of self terminal, be terminal distribution entrance of calling control system dot address, and will be handed down to terminal by the mobile IP registration response message for the entrance of calling control system dot address of terminal distribution.

25. method according to claim 22, it is characterized in that, described terminal adopts PMIP, then in the mobile IP registration process, home agent is according to the entrance of calling control system dot address request indication of carrying in the mobile IP login request message from the PMIP client, be terminal distribution entrance of calling control system dot address, and will be the entrance of calling control system dot address of terminal distribution, send to the PMIP client of terminal by the mobile IP registration response message;

26. a system that finds entrance of calling control system is characterized in that, this system comprises: terminal and home agent; Wherein, home agent is a terminal distribution entrance of calling control system dot address, and will be handed down to described terminal for the entrance of calling control system dot address of terminal distribution.

27. system according to claim 25 is characterized in that, further comprises in the described system: PMIP client and be arranged in the DHCP proxy of same physical entity with the PMIP client;