CN101287292B - Method and terminal for discovering entrance of calling control system - Google Patents
Method and terminal for discovering entrance of calling control system Download PDFInfo
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- CN101287292B CN101287292B CN200810092570.2A CN200810092570A CN101287292B CN 101287292 B CN101287292 B CN 101287292B CN 200810092570 A CN200810092570 A CN 200810092570A CN 101287292 B CN101287292 B CN 101287292B
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Abstract
The embodiment of the invention discloses a method for discovering an entry of a call control system and a terminal thereof. The method of the invention comprises the steps that the terminal receives the address of the entry point of the call control system, which is distributed and issued by an authentication, authorization and accounting (AAA) server; the terminal then can find the entry of the call control system according to the address of the entry point of a call. Therefore, the terminal can obtain the address of the entry point of the call control system without the exchange of a DHCP process and a DHCP server, which results in that the terminal can obtain the address of the energy point of the call so as to discover the entry of the call more flexibly.
Description
The application is that China formerly applies for a patent dividing an application of " method and system of finding entrance of calling control system ", and the application number of formerly applying for a patent is CN 200710006604.7, and the applying date is on January 18th, 2007.
Technical field
The present invention relates to the call control system technical field, especially relate to two kinds of method and terminals of finding 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 WMG (IMS-Media Gateway; IMS-MGW), Multimedia Resource Function controlled entity (MultimediaResource Function Controller; MRFC), Multimedia resource function processor (MRFP) (MultimediaResource Function Processor, MRFP) with 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.
Shown in Figure 1 is the network architecture under user's roaming condition of WiMAX for Access Network, and wherein P-CSCF is unique inlet that all sip messages are sent at the MPTY terminal.Therefore before sending sip message, the address of P-CSCF must be known in the terminal.
In the prior art, the address that obtains P-CSCF alternately through DHCP (DHCP) and Dynamic Host Configuration Protocol server, terminal.Idiographic flow is as shown in Figure 2, comprises the steps:
In step 201; The terminal is sent DHCP to DHCP relay (DHCP Relay) and is found (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 the DHCP relay P-CSCF address that the dhcp response message that receives is loyal provides (DHCP Offer) message to send to the terminal through DHCP.
In the WiMAX system, the network insertion at terminal and mobile management are realized through client mobile IP (CMIP) and proxy-mobile IP (PMIP) dual mode.Adopt under the PMIP scene at the terminal, when the PMIP client was exercised relay function, the registration and the dhcp process that move IP were independent respectively, so the terminal can obtain the P-CSCF address through the flow process of above-mentioned prior art; And when the PMIP client was exercised agent functionality, the registration and the dhcp process that move IP combined, and did not relate to Dynamic Host Configuration Protocol server, therefore can't obtain the P-CSCF address through above-mentioned prior art.In CMIP, do not comprise dhcp process, therefore can't obtain the P-CSCF address yet through above-mentioned prior art.
Summary of the invention
In view of this, main purpose of the present invention is to provide the method and the terminal of two kinds of discovery entrance of calling control system, can make the discovery of entrance of calling control system more flexible.
An aspect the invention provides a kind of method of finding entrance of calling control system, and this method comprises: it is said terminal distribution and the entrance of calling control system dot address that issues that the terminal receives the authentication and authorization charging aaa server; According to the address of calling out the entrance, call control system calling inlet is found at the terminal.
On the other hand, the invention provides a kind of method of finding entrance of calling control system, this method comprises: the terminal receives that to recognize home agent be said terminal distribution and the entrance of calling control system dot address that issues; According to the address of calling out the entrance, call control system calling inlet is found at the terminal.
Again on the one hand, the invention provides a kind of terminal, this terminal comprises: the entry point address receiving equipment is used to receive the entrance of calling control system dot address that authentication and authorization charging aaa server or home agent send.
Can find out from such scheme; In the embodiment of the invention; Through being terminal distribution entrance of calling control system dot address; Make to need not to carry out dhcp process, thereby realized that the terminal obtains the address of calling out the entrance more neatly and finds to call out and enter the mouth with the Dynamic Host Configuration Protocol server interactive terminal also can obtain the entrance of calling control system dot address.
Description of drawings
Fig. 1 for IMS system institute based on Access Network be WiMAX network of network composition sketch map;
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 sketch map;
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 sketch map;
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 sketch map;
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 sketch map;
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 sketch map;
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 sketch map;
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 sketch map;
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 sketch map;
Figure 18 is the flow chart of terminal to obtain P-CSCF address in the eighth embodiment of the invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, the present invention is made further detailed description 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 the terminal for terminal distribution entrance of calling control system dot address.
Aaa server or HA can directly be handed down to the terminal with the entrance of calling control system dot address that disposes in self among the present invention, also can the entrance of calling control system dot address that dispose in self be handed down to other network elements after, be handed down to the terminal by other network elements; Perhaps, the entrance of calling control system dot address is handed down to the terminal by aaa server, HA or other network elements by the terminal request initiation request.Make the 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 through in several kinds of different scenes that are applied in the WiMAX system as specific embodiment to further explain of the present invention.
The present invention is applied in the terminal and adopts under the PMIP scene and to obtain the P-CSCF address through dhcp process be the first embodiment of the present invention at the terminal.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, the 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, the terminal is used for initiating the EAP identifying procedure through the authenticator to aaa server, and after the EAP authentication is accomplished, obtains the P-CSCF address through the DHCP flow process to DHCP proxy/relay request; DHCP proxy/relaying is used for obtaining the P-CSCF address according to the request at terminal from the authenticator and sends to the terminal; The authenticator is used for alternately authentication being carried out at the terminal with aaa server, and obtains the P-CSCF address from aaa server; Aaa server is used for authentication is carried out at the terminal, 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, 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 through 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, 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.
Under roaming scence, to be example, the terminal finds that the flow process of P-CSCF address is as shown in Figure 4 in the present embodiment, comprises the steps:
Step 401～step 402, in the EAP verification process, the EAP authentication message is sent to the authenticator in the terminal, the authenticator is according to the EAP authentication message of coming self terminal, sends the EAP authentication request through the V-AAA server to the H-AAA at terminal server.
Step 403, H-AAA server carry out authentication to the terminal, and send the authentication relevant parameter through 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 through 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 the terminal.
Step 405, in dhcp process, the 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 the terminal through 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; The indication of P-CSCF Address requests can not be carried at the terminal 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 the terminal with the P-CSCF address that the authenticator obtains.
In the present embodiment; As shown in table 1 with carrying content included in the EAP message of P-CSCF address between H-AAA, V-AAA and Access Network; From table 1, can find out; EAP message in the present embodiment has increased last two on existing EAP message basis: P-CSCF and DNS, and 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) |
| 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 |
| 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 |
| 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 |
Table 1
In above-mentioned first embodiment, aaa server is handed down to the authenticator through the EAP verification process with the P-CSCF address that disposes in self, and the terminal obtains the P-CSCF address through dhcp process again.In the second embodiment of the present invention, aaa server still is handed down to the authenticator through the EAP verification process with the P-CSCF address that disposes in self, but after this sends the P-CSCF address through broadcast to the terminal.
Be illustrated in figure 5 as present embodiment based on system form sketch map, 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 in routing broadcast message, increases the P-CSCF address information that authenticator obtains from aaa server; Then the terminal obtains 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 corresponding routing broadcast message is external agent's broadcast or advertising of route message.
In the present embodiment, in routing broadcast message, increase like the scaling option cell in the table 2, 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 is as shown in Figure 6; Wherein included step 601 to the step 604 of EAP verification process is identical with step 401 to step 404 among Fig. 4; In step 605; Access Network gateway structure comprises the routing broadcast message of P-CSCF address, and this message is broadcasted, and then the 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 moving IP request flow process sends to the terminal through home agent.
Present embodiment based on system as shown in Figure 7, comprise terminal, home agent and aaa server.Wherein, the 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 the request to authentification of user to aaa server, and aaa server is sent to the terminal through the P-CSCF address that authentication response issues through the MIP registration reply message; The request to authentification of user that aaa server is used to receive from home agent is carried out authentication to the user, and the P-CSCF address that disposes in self is sent to home agent through authentication response.
Under roaming scence, the Foreign Agent that further comprises the terminal in the system of present embodiment and connected, then Foreign Agent is used between terminal and home agent, transmitting request and response message.
Under roaming scence, to be example, the terminal finds that the flow process of P-CSCF address is as shown in Figure 8 in the present embodiment, comprises the steps:
Step 801, Foreign Agent to terminal advertisement, make the terminal obtain the address (CoA) of Foreign Agent through 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 the network identity NAI, 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 carries out authentication and requires to obtain relevant information 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 the 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 initiate at the terminal, 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 empty, length (length) field is used for indicating shared space, data territory big or small.In the MIP registration reply message of then in step 806 to step 807, mentioning; Increase cell accordingly and carry the P-CSCF address message; The cell that increases is identical with table 3 structure; The Type value of Type value wherein and corresponding request message is the same, and the data territory is the IP address list of the P-CSCF of distribution, perhaps tabulates (domain name list) for domain name and the IP address of DNS.
| Type | lengih | 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 at terminal disposes in self in moving IP request flow process sends to the terminal.
Present embodiment based on system as shown in Figure 9, comprise terminal and home agent.Wherein, the 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 the terminal through the MIP registration reply message for the P-CSCF address of terminal distribution.
Under roaming scence, the Foreign Agent that further comprises the terminal in the system of present embodiment and connected, then Foreign Agent is used between terminal and home agent, transmitting request and response message.
Under roaming scence, to be example, the terminal finds that the flow process of P-CSCF address is shown in figure 10 in the present embodiment, wherein; Step 1001 to step 1003 is identical with step 801 to step 803 among Fig. 8; In step 1004, after home agent receives the MIP register requirement, be terminal distribution P-CSCF address according to the P-CSCF address that disposes in self; And will send to Foreign Agent through the MIP registration reply message for the P-CSCF address of terminal distribution; In step 1005, Foreign Agent returns the MIP response message to the MIP register requirement that initiate at the terminal, 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 the terminal adopt under the PMIP scene and the terminal through 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, through the mobile IP request flow process that combines with dhcp process, aaa server sends to the terminal with the P-CSCF address that disposes in self through home agent.
Present embodiment based on system shown in figure 11, comprise terminal, DHCP proxy, PMIP client, home agent and aaa server.Wherein, the 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 at terminal request trigger PMIP client 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 through DHCP sends to the 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 the request to authentification of user to aaa server, and aaa server is sent to the PMIP client through the P-CSCF address that authentication response issues through the MIP response; The request to authentification of user that aaa server is used to receive from home agent is carried out authentication to the user, and the P-CSCF address that disposes in self is sent to home agent through authentication response.
Under roaming scence, the Foreign Agent that further comprises the terminal in the system of present embodiment and connected, then Foreign Agent is used between PMIP client and home agent, transmitting request and response message.
Under roaming scence, to be example, the terminal finds that the flow process of P-CSCF address is shown in figure 12 in the present embodiment, comprises the steps:
The dhcp discover message that has request P-CSCF indication information is sent at step 1201, terminal 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 carry out authentication and require obtaining relevant information to the user, can comprise P-CSCF Address requests indication information in this authentication request.
After step 1205, aaa server receive the authentication request from home agent, the user is carried out authentication, and, be included as the P-CSCF address that the user distributes in this message to home agent return authentication response message.
The mobile IP login information that step 1206, home agent response Foreign Agent are initiated comprises the P-CSCF address that aaa server distributes in the MIP registration reply message that outwards agency sends
The MIP register requirement that step 1207, Foreign Agent are initiated the PMIP client responds, and in the MIP registration reply message that the PMIP client is sent, comprises the P-CSCF address that aaa server distributes
Step 1208, PMIP client trigger DHCP proxy transmission DHCP and give information to the 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 P-CSCF Address requests indication can be carried through the DHCP request message in the terminal, and DHCP proxy is that the terminal is handed down in the P-CSCF address of terminal distribution through 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 the terminal through 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 the terminal adopt under the PMIP scene and the terminal through 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, through the mobile IP request flow process that combines with dhcp process, HA sends to the terminal with the P-CSCF address that disposes in self through home agent.
Present embodiment based on system shown in figure 13, comprise terminal, DHCP proxy, PMIP client and home agent.Wherein, the 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 at terminal request trigger PMIP client 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 through DHCP sends to the 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 through the MIP response.
Under roaming scence, the Foreign Agent that further comprises the terminal in the system of present embodiment and connected, then Foreign Agent is used between PMIP client and home agent, transmitting request and response message.
Being example under roaming scence; The terminal finds that the flow process of P-CSCF address is shown in figure 14 in the present embodiment; Wherein, step 1401 to step 1403 is identical with step 1201 to step 1203 among Figure 12, 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 through 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 the 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 the indication of P-CSCF Address requests can be carried through the DHCP request message in the terminal, and DHCP proxy is handed down to terminal with HA for the P-CSCF address that the user distributes through 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 the terminal through 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 the terminal through the couple in router in the Access Network gateway.Below through the 7th embodiment this mode of terminal to obtain P-CSCF address that makes is elaborated.
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, The terminal is used for carrying out initial access authentication alternately with the Access Network gateway; And after accomplishing 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 the information such as P-CSCF address in the message, and receive the response and be handed down to the terminal through obtaining information according to the information that information request will comprise the P-CSCF address obtained at 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 through 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 terminal finds that the flow process of P-CSCF address is shown in figure 16 in the present embodiment, comprises the steps:
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 information such as corresponding HA, HL, and are terminal distribution P-CSCF address information.
Step 1604, H-AAA will send to the Access Network gateway for the information such as HA, HL and P-CSCF address that the user distributes through inserting acceptance (Access Accept) message.
Information such as the HA that step 1605, Access Network gateway stores receive, HL and P-CSCF address.
Step 1606, Access Network gateway and terminal interaction are accomplished 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 the terminal with P-CSCF address information and other relevant informations of Access Network gateway stores through 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 through 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 at pre-configured this terminal.Below through the 8th embodiment this mode of terminal to obtain P-CSCF address that makes is elaborated.
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, The terminal is used for carrying out initial access authentication alternately with the Access Network gateway; And after accomplishing 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 the information such as P-CSCF address in the message, and receive the response and be handed down to the terminal through obtaining information according to the information that information request will comprise the P-CSCF address obtained at 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 through 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 terminal finds that the flow process of P-CSCF address is shown in figure 18 in the present embodiment, comprises the steps:
Step 1801, external agent through pre-configured or portable terminal go in the network process obtain its P-CSCF address through its initial authentication process through AAA after; Foreign Agent to terminal advertisement, makes the terminal obtain the address (CoA) of Foreign Agent through 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 the network identity NAI, 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 carries out authentication and requires to obtain relevant information the user.
Step 1805, aaa server return the aaa authentication response message to home agent after receiving the 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 initiate at the terminal, 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 empty, length (length) field is used for indicating shared space, data territory big or small.In the MIP registration reply message of then in step 806 to step 807, mentioning; Increase cell accordingly and carry the P-CSCF address message; The cell that increases is identical with table 3 structure; The Type value of Type value wherein and corresponding request message is the same, and the data territory is the IP address list of the P-CSCF of distribution, perhaps tabulates (domain name list) for domain name and the IP address of DNS.
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.
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 embodiment according to the present invention just plays an exemplary role, not in order to restriction protection scope of the present invention.
Claims (6)
1. a method of finding entrance of calling control system is characterized in that, this method comprises:
It is said terminal distribution and the entrance of calling control system dot address that issues that the terminal receives the authentication and authorization charging aaa server;
According to the address of said entrance of calling control system point, call control system calling inlet is found at the terminal;
Wherein, it is said terminal distribution and the entrance of calling control system dot address that issues that said terminal receives the authentication and authorization charging aaa server, comprising:
In Extensible Authentication Protocol EAP verification process; Said terminal receives the said entrance of calling control system dot address that the dynamic host configuration protocol DHCP entity issues; Wherein, Said entrance of calling control system dot address is said terminal distribution by said authentication and authorization charging aaa server, and is handed down to the authenticator by said authentication and authorization charging aaa server, and is obtained from said authenticator by the said DHCP entity that is in the same physical entity with said authenticator.
2. method according to claim 1 is characterized in that, said control system entry point address is pre-configured by aaa server, and is terminal distribution according to the entrance of calling control system dot address that disposes in the aaa server.
3. method according to claim 1 is characterized in that, the said DHCP entity of said terminal request is handed down to said terminal with said entrance of calling control system dot address from aaa server.
4. method according to claim 3 is characterized in that, said terminal is through dhcp discover message, or the DHCP request message is to authenticator's acquisition request entrance of calling control system dot address.
5. according to arbitrary described method in the claim 1 to 4, it is characterized in that said call control system is an IP Multimedia System; Said entrance of calling control system point is: proxy-call session control function entity P-CSCF or initial session protocol sip agent.
6. according to arbitrary described method in the claim 1 to 4, 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.
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| CN200810092570.2A CN101287292B (en) | 2007-01-18 | 2007-01-18 | Method and terminal for discovering entrance of calling control system |
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