CN101217795A - A settlement method of the local transferring of the terminal in IP multimedia subsystem - Google Patents
A settlement method of the local transferring of the terminal in IP multimedia subsystem Download PDFInfo
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- CN101217795A CN101217795A CNA2008100015656A CN200810001565A CN101217795A CN 101217795 A CN101217795 A CN 101217795A CN A2008100015656 A CNA2008100015656 A CN A2008100015656A CN 200810001565 A CN200810001565 A CN 200810001565A CN 101217795 A CN101217795 A CN 101217795A
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Abstract
The invention discloses a resolvent of local transfer with a terminal in an IP multimedia sub-system IMS, comprising that when a subscriber terminal UE is registered or registered again, the registering/reregistering requirement is added by a UE which owns more than one IP address and supports the flag of local transfer which is sent to an IMS network; the IMS network judges whether the UE can use a dual IP addresses and the local transfer achieves a session; if the UE can use the dual IP addresses, the IMS network adds a flag of system support dual IP and local transfer in a register response message; the IMS network stores the information whether the UE supports the dual IP addresses and the UE has local transfer session capability. The invention can lead the terminal to support a local transfer function when roaming, changes existing IMS network technique little, affects existing frame little and is convenient for updating the existing IMS network technique.
Description
Technical field
The present invention relates to communication field, relate in particular to a kind of terminal local solution that produces in IP Multimedia System.
Background technology
IMS (IP Multimedia Subsystem, IP Multimedia System) is a third generation affiliate tissue (3
RdGeneration Partnership Project, abbreviation 3GPP) standard of the next generation network of definition, its distinguishing feature is to have adopted Session initiation Protocol (Session Initiation Protocol, be called for short SIP) system, communication is irrelevant with access, can possess multiple media business controlled function separates with bearing capacity, calling separates with session, application separates with service, business and network detach, and multiple abilities such as mobile network and internet integrated services, the trend of communication network fusion development has been complied with in the proposition of IMS.
Major function entity in the IMS system comprises: call conversation control function entity (the Call Session Control Function that functions such as user's registration management, session control are provided, be called for short CSCF), home subscriber server (the Home Subscriber Server of centralized management user contracting data function is provided, be called for short HSS), the application server (Application Server is called for short AS) of miscellaneous service logic control function is provided.
Fig. 1 is the Media Stream schematic diagram that the user calls out the visit ground user that coexists in the prior art on visit ground, relate generally to following network element and equipment: user terminal 1 (User Equipment 1, be called for short UE1), gateway (Serving Gateway, be called for short SGW), user terminal 2 (User Equipment 2 is called for short UE2), public data network gateway (Public Data Networks Gateway is called for short PGW).When UE1 registers in network 1, after this network has distributed an IP address to UE1, the IMS netsurfing of this users from networks 1 is to the IMS network of network 2, according to prior art, if when this moment, UE1 called out the user terminal UE2 of the network 2 that coexists, medium need return the PGW of network 1 from network 2 routes, and then by the PGW route network 2 of network 1, just can reach UE2, as shown in Figure 1.UE1 calls out UE2, after the connection, medium will be from UE1, path 105 between UE1 and SGW, path 106 between SGW and the PGW, path 107 between PWG and the UE2 arrives UE2, the path between SGW and the PGW 106 in most of the cases, path 107 between PGW and the UE2 all is distant path between network 1 and the network 2, route is circuitous serious, cause a large amount of waste of network resources, and for the user, because the difference of this twice routing mode charging policy also may be for the user brings extra huge telephone expenses, in like manner, when visited network receives calls, also there is identical detour problem.And if behind the medium arrival SGW, directly the path 108 between process SGW and the UE2 is routed to UE2, will save a large amount of Internet resources, solve aforesaid network route detour problem.The mode that medium in this case are routed directly to UE2 is called this locality and produces.
At present 3GPP organizes also being devoted to this locality and produces important function for of research, solve medium detour problem under the roaming state, and the solution of two IP address has been proposed: under the condition that ability of user terminal, carrier policy and network condition all allow, can have respectively the IP address allocated IP-1 of operator simultaneously by network 1; And the IP address allocated IP-2 of operator of network 2, these two IP addresses can be carried out signaling plane, the communication of medium face as required respectively.
Fig. 2 is the configuration diagram of two IP addresses solution, relate generally to following network element and equipment: user terminal (User Equipment, be called for short UE), gateway (Serving Gateway, be called for short SGW), public data network gateway 2 (PDN Gateway 2, be called for short PGW-2), policy control and charging rule functions 2 (Policy Control and Charging Rules Function 2, be called for short PCRF-2), public data network gateway 1 (PDN Gateway 1, be called for short PGW-1), policy control and charging rule functions 1 (Policy Control and Charging Rules Function 1 is called for short PCRF-1), Proxy Call Session Control Function (Proxy Call Session Control Function, be called for short P-CSCF), service call conversation control function (Serving Call Session Control Function is called for short S-CSCF), application server (Application Server is called for short AS).
Its main thought is: use IP-1 to send signaling, IP-2 sends medium, signaling is through after the SGW, to mail to the PGW (PGW-1) of network 1 by the path between SGW and the PGW-1 210, and medium directly mail to the PGW (PGW-2) of network 2 through after the SGW by the path between SGW and the PGW-2 211.
The user must the successful execution registration process before using the IMS business, and the IMS network uses the registration process of Session Initiation Protocol, realizes that the user inserts the IMS network.User registration success will be set up relation between public user identity and this user's current location at home domain S-CSCF.Terminal may further comprise the steps at IMS network success register flow path as shown in Figure 3 in the prior art:
S301, UE sends register requirement to P-CSCF;
S302 when P-CSCF receives register requirement, finds the I-CSCF (Interrogating CSCF, consultant call conversation control function) of user attaching Network Access Point by DNS inquiry or other method, and register requirement is forwarded to I-CSCF;
S303, I-CSCF sends a request message to HSS, and request distributes S-CSCF;
S304, HSS return the ability of the S-CSCF name or the S-CSCF of distribution to I-CSCF;
S305, I-CSCF sends to selected S-CSCF with login request message;
S306～S316, if S-CSCF need carry out authentication to the user, need so to obtain the authentification of user vector to HSS, and according to the Ciphering Key that returns in the S307 message, structure challenge request (401Unauthorized message) is after this challenge request is forwarded to UE, UE constructs challenge responses, after S-CSCF receives S115 challenge responses message, judge user's legitimacy, finish authentication, authentication the user; If do not need authentication, can directly carry out S317;
S317, S-CSCF sends the request of user's configuration data to HSS;
S318, HSS stores S-CSCF information, and user contracting data, charging address information are returned S-CSCF;
S319, the S-CSCF storing subscriber information comprises user contracting data, charging address etc.;
S320～S322, S-CSCF makes up the response of succeeding in registration, and response forwards UE to behind I-CSCF and P-CSCF, and so far UE successfully registers at the IMS network.
Wherein also need to carry out flow processs such as state subscription, third-party registration,, it is omitted at Fig. 3 owing to do not have direct relation with the present invention.Register flow path of the prior art can not be suitable for the situation of two IP address shown in Figure 2 fully, can't use two IP addresses to support this locality to produce function.
Summary of the invention
The technical problem to be solved in the present invention is exactly to propose a kind of terminal local solution that produces in IP Multimedia System, overcome and to use two IP addresses to support the local defective that produces function in the prior art, make terminal when roaming, support this locality to produce function.
In order to solve the problems of the technologies described above, the invention provides a kind of terminal local solution that produces in IP Multimedia System IMS, comprise the steps:
(1) user terminal UE sends to the IMS network in registration/when heavily registering, add UE and have more than an IP address in registration/heavy register requirement, and support the mark that this locality is produced;
(2) the IMS network judges whether this UE can use two IP addresses, and this locality produces and carry out session, if judge and can use, and then two IP of IMS network adding system support in registration reply message and the local mark that produces; The IMS network is preserved this UE and whether is supported two IP addresses and whether possess the ability information that session is produced in this locality.
Further, whether described step (1) UE sends before the registration/weight register requirement, confirm self to support two IP and this locality to produce, if support then whether inspection has pair IP addresses at present, and distinguish these two IP addresses respectively by which network allocation, whether support this to produce.
Further, in the described step (1), when UE has more than an IP address, and wherein there is the corresponding this locality of supporting of IP to produce service, in the information header of register requirement, adds and support two IP marks; Described mark adds label by expansion Session initiation Protocol SIP header or in existing SIP header to be realized.
Further, in the described step (1), when UE supports that this locality is produced, in the information header of register requirement, add and support this locality to produce mark; Described mark adds label by expansion SIP header or in existing SIP header to be realized.
Further, in the described step (2), can not use two IP addresses, and this locality produces and carry out session, then in the registration response, add and do not support two IP and the local mark that produces if the IMS network is judged this UE.
Further, in the described step (2), the network based operator of IMS local policy, user of current roaming situation, roaming place and the local operator situation of contracting, and the signatory state information of this user judges whether this UE can use two IP addresses, and this locality is produced and is carried out session.
Further, in the described step (2), carry out described judgement by P-CSCF in the IMS network or S-CSCF, it obtains basis for estimation is from this locality acquisition or from other network element, comprises that policy control and charging rule functions, Certificate Authority statistical server obtain.
Further, in the described step (2), the P-CSCF in the IMS network transmits when succeeding in registration response, and perhaps S-CSCF sends before the response of succeeding in registration, and adds at the success response header and supports this locality to produce and two IP mark; Described mark adds label by expansion SIP header or in existing SIP header to be realized.
Further, in the described step (2), after S-CSCF finishes authentication to UE in the IMS network, whether support two IP addresses and whether possess the ability information that session is produced in this locality at this UE of local record; And/or whether P-CSCF supports two IP addresses and whether possesses the ability information that session is produced in this locality at this UE of local record when response is succeeded in registration in forwarding.
Further, in the described step (2), using an application server to store UE supports two IP addresses and possesses the ability information that session is produced in this locality: when UE in the registration of IMS network, S-CSCF finds that UE supports two IP addresses or possess this locality to produce ability, just carry out third-party registration, support two IP addresses and possess the ability information that session is produced in this locality by this application server for storage UE at this application server.
Further, rise at UE and to exhale or when eventually exhaling session, whether the UE of storage supports two IP addresses and whether possesses this locality to produce the ability information of session and judge that can this session carry out this locality and produce during the network based registration of IMS.
Further, judge that by the P-CSCF in the IMS network of the described information of storage or S-CSCF or application server can carry out this locality produces.
Further, support this locality to produce when the IMS network has this UE, and have the information of two IP, then carry out whether can carrying out the judgement that this locality is produced, otherwise do not need to judge.
Further,, then judge currently whether also have other IP address to can be used for session,, then use other IP to initiate new call request if having if described UE receives by the local response of producing of IMS network refusal.
The present invention makes terminal support this locality to produce function when roaming, and change little to existing IMS network technology, only relate to the modification of indivedual network elements, the interpolation of local flow process, and the suitable modification of header field, little to existing framework influence, if upgrade from existing IMS network technology, cost, risk are all very little.
Description of drawings
Fig. 1 is the Media Stream schematic diagram that the user calls out visit ground user in the prior art on visit ground;
Fig. 2 is the configuration diagram of two IP addresses solution in the prior art;
Fig. 3 is the schematic flow sheet that UE successfully registers at the IMS network in the prior art;
Fig. 4 is the register flow path schematic diagram of the embodiment of the invention;
Fig. 5 is the embodiment schematic flow sheet that UE that the two IP of support of the present invention, this locality are produced successfully registers at the IMS network;
Fig. 6 is another embodiment schematic flow sheet that UE that the two IP of support of the present invention, this locality are produced successfully registers at the IMS network;
Fig. 7 is UE that the two IP of support of the present invention, this locality are produced successfully registered and carried out third-party registration on AS at the IMS network an embodiment schematic flow sheet;
Fig. 8 is the embodiment schematic flow sheet of exhaling the successfully registration of the present invention back UE beginning;
Fig. 9 is the embodiment schematic flow sheet that successfully registration back UE of the present invention exhales eventually.
Embodiment
Core concept of the present invention is: UE sends to the IMS network in registration/when heavily registering, add UE and have more than an IP address in registration/heavy register requirement, and support the mark that this locality is produced; The IMS network judges whether this UE can use two IP addresses, and this locality produces and carry out session, if judge and can use, and then two IP of IMS network adding system support in registration reply message and the local mark that produces; And the IMS network is preserved this UE and whether is supported two IP addresses and possess the ability information that session is produced in this locality.
The present invention is described in detail below in conjunction with drawings and the specific embodiments.
As shown in Figure 4, the register flow path of the embodiment of the invention comprises the steps:
S401, UE sends in registration/when heavily registering, add UE and have more than an IP address in registration/heavy register requirement, and support the mark that this locality is produced;
Wherein, before UE initiates registration/weight register requirement, confirm self whether to support two IP and this locality to produce earlier, if support then whether inspection has pair IP addresses at present, and distinguish these two IP addresses respectively by which network allocation, whether support this to produce;
When UE has more than an IP address, and wherein there is the corresponding this locality of supporting of IP to produce service, in REGISTER (registration) information requested header, adds and support two IP marks; Mark can also can add label and finish by expansion SIP header in existing SIP header;
When UE supports that this locality is produced, in REGISTER information requested header, add and support this locality to produce mark; Mark can also can add label and finish by expansion SIP header in existing SIP header;
Here it also can be to represent both to support two IP with a mark that the two IP marks of the support of indication, this locality produce mark, also supports this locality to produce, or supports this locality of two IP types to produce;
S402, P-CSCF/S-CSCF will be according to the signatory situations of operator's local policy, user of current roaming situation, roaming place and local operator, and information such as the signatory state of this user judges whether this UE can use two IP addresses, and this locality is produced and carried out session;
Described P-CSCF/S-CSCF obtains basis for estimation and can obtain from this locality, also may obtain from other network element, as PCRF, Certificate Authority statistical server (Authentication AuthorizationAccounting is called for short AAA) etc.;
Wherein, finish authentication, the tissue response of succeeding in registration to UE by S-CSCF;
S403, if judge that the user can use, two IP of P-CSCF/S-CSCF adding system support in registration reply message and the local mark that produces; If judge and cannot use, P-CSCF/S-CSCF adds in the registration response and does not support two IP and the local mark that produces, and can ignore the mark that UE carries with P-CSCF/S-CSCF like this and distinguish; If judge and never can use, the mark that this locality is produced is not supported in P-CSCF/S-CSCF interpolation in the registration response;
P-CSCF transmits when succeeding in registration response, perhaps S-CSCF sends before the response of succeeding in registration, adding support this locality at the success response header produces and two IP mark, described mark can be represented with a mark, also can represent with two marks respectively, can also can in existing SIP header, add label and finish by expansion SIP header;
S404, P-CSCF/S-CSCF preserve the information that UE supports that two IP addresses, this locality are produced.
Step S404 and step S403 can executed in parallel, or first execution in step S404, and execution in step S403 promptly can preserve the information that UE supports that two IP addresses, this locality are produced earlier again, carries out and transmits the response of step that succeeds in registration; That is:
After S-CSCF finishes authentication to UE, whether support two IP addresses, whether possess the ability information that session is produced in this locality at this UE of local record; When P-CSCF succeeds in registration response in forwarding, whether support two IP addresses, whether possess the ability information that session is produced in this locality at this UE of local record;
Wherein, can preserve UE respectively by P-CSCF and S-CSCF and whether support two IP and this locality to produce information, can all preserve, also can have only an entity to preserve; In a register requirement, can all carry out, also can only carry out one; Even can support two IP information, and produce information with support this locality and be kept on the different entities, preserve as P-CSCF and support two IP, and S-CSCF preservation support this locality is produced;
Also can add an application server, add function on the perhaps existing application server, store UE and support two IP addresses and possess the ability information that session is produced in this locality at the home domain network; When UE in the registration of IMS network, S-CSCF finds that UE supports two IP addresses or possess this locality to produce ability, just carry out third-party registration, support two IP addresses and possess the ability information that session is produced in this locality by application server for storage UE at this application server.
As shown in Figure 5, the embodiment flow process successfully registered at the IMS network of the UE that produces of the two IP of support of the present invention, this locality comprises the steps:
S501, when UE enters network 2, network 1 has distributed an IP address ip-1 to give this UE to UE, and network 2 has distributed the IP-2 address to give this UE, and this UE has had two IP addresses simultaneously;
S502, UE are when organizing the REGISTER request message, and UE adds two IP and the local sign that produces in the REGISTER message, and this request are sent to the PGW (PGW-1) of network 1 by IP-1;
S503, PGW-1 is transmitted to P-CSCF with the REGISTER request;
S504, P-CSCF is transmitted to I-CSCF with the REGISTER request;
S505, I-CSCF sends a request message to HSS, and request distributes S-CSCF, and HSS returns the ability of the S-CSCF name or the S-CSCF of distribution to I-CSCF;
S506, I-CSCF issues selected S-CSCF with the REGISTER request;
S507 if S-CSCF need carry out authentication to the user, needs to obtain the authentification of user vector to HSS so;
S508, S-CSCF are according to the Ciphering Key that returns in the S507 message, and structure challenge request (401Unauthorized message) if do not need authentication, can directly be carried out S520;
S509, S-CSCF will challenge request (401 message) and issue I-CSCF;
S510, the I-CSCF request of will challenging is transmitted to P-CSCF;
S511, the P-CSCF request of will challenging is transmitted to PGW-1;
UE is issued in S512, the PGW-1 request of will challenging, and UE constructs challenge responses, and adds two IP and the local sign that produces in challenge responses;
S513, UE issues PGW-1 with challenge responses;
S514, PGW-1 is transmitted to P-CSCF with challenge responses;
S515, P-CSCF issues I-CSCF with challenge responses;
S516, I-CSCF sends a request message to HSS, and request distributes S-CSCF, and HSS returns the ability of the S-CSCF name or the S-CSCF of distribution to I-CSCF;
S517, I-CSCF issues selected S-CSCF with challenge responses;
S518, S-CSCF obtains the authentification of user vector to HSS;
S519, S-CSCF judge user's legitimacy according to the Ciphering Key that obtains from HSS, finish authentication, authentication, finish after the authentication, except preserving other user terminal information that need preserve the user, also preserve user terminal and support two IP, support the local information that produces; S-CSCF makes up the response (200 OK) of succeeding in registration, if the S-CSCF support to two IP End of Address, will support the information of two IP to add in the success response; S-CSCF according to the local policy in the operation, with visit territory operator between agreement, and terminal unit contractual information etc. judges whether this terminal can use this locality to produce, as can, can use this locality to produce and identify and add in the success response;
S520, S-CSCF will succeed in registration to respond and issue I-CSCF;
S521, I-CSCF will succeed in registration to respond and be transmitted to P-CSCF;
S522, P-CSCF receive after the response of succeeding in registration, and, also preserve user terminal and support two IP except preserving other user terminal information that need preserve in this locality, support the local information that produces;
S523, P-CSCF will succeed in registration to respond and be transmitted to PGW-1;
S524, PGW-1 will succeed in registration to respond and be transmitted to UE, and UE has completed successfully registration in the IMS network.
In above registration process, UE is except bind authentication, authentication, the contact address of finishing common registration at the IMS network, also allow the IMS core network of home network know UE and had second IP address that visited network distributes, UE has the ability that session is produced in this locality of carrying out, allow UE know the IMS network and can serve and have two IP End of Address, be provided as the ability that this locality is produced provides service.
In above registration process, preserve UE by P-CSCF and S-CSCF in the IMS network and have the information that ability is produced in this locality, also can preserve these information by any one network element among P-CSCF and the S-CSCF, certainly adding network support this locality in response produces mark and can also can be carried out by P-CSCF as shown in Figure 6 by being carried out by S-CSCF (among the S519) as shown above.
As shown in Figure 6, be another embodiment flow process that UE that the two IP of support of the present invention, this locality are produced successfully registers at the IMS network, comprise the steps:
The flow process of same sequence number is described among the same S501～S518 of S601～S618;
S619, S-CSCF judge user's legitimacy according to the Ciphering Key that obtains from HSS, finish authentication, authentication, finish after the authentication, except preserving other user terminal information that need preserve the user, also preserve user terminal and support two IP, support the local information that produces; S-CSCF makes up the response (200 OK) of succeeding in registration;
S620, S-CSCF will succeed in registration to respond and issue I-CSCF;
S621, I-CSCF will succeed in registration to respond and be transmitted to P-CSCF;
S622, P-CSCF receives after the response of succeeding in registration, and, also preserves user terminal and supports two IP except preserving other user terminal information that need preserve in this locality, if P-CSCF supports two IP End of Address, will support the information of two IP to add in the success response; P-CSCF according to operator's local policy, and visit territory operator between agreement, and terminal use's CAMEL-Subscription-Information etc. judges whether this terminal can use this locality to produce, as can, can use this locality to produce and identify and add in the success response;
S623, P-CSCF is transmitted to PGW-1 with success response;
S624, PGW-1 is transmitted to UE with success response, and UE has completed successfully registration in the IMS network.
Certainly, also can add an application server in the IMS network and come special disposal this locality to produce service, its flow process as shown in Figure 7.To be the UE that produces of the two IP of support of the present invention, this locality successfully register and carry out the flow process of third-party registration at the IMS network to Fig. 7 on AS, comprises the steps:
The flow process of same sequence number is described among the same S501～S518 of S701～S718;
S719, S-CSCF is according to the Ciphering Key that obtains from HSS, judge user's legitimacy, finish authentication, authentication to the user, finish after the authentication, whether will support two IP, this locality to produce decision and whether carry out third-party registration on AS according to UE, S-CSCF makes up the response (200 OK) of succeeding in registration;
S720, S-CSCF will succeed in registration to respond and issue I-CSCF;
S721, I-CSCF will succeed in registration to respond and be transmitted to P-CSCF;
S722, P-CSCF will succeed in registration to respond and be transmitted to PGW-1;
S723, PGW-1 will succeed in registration to respond and be transmitted to UE, and UE has completed successfully registration in the IMS network;
S724, in S719, S-CSCF finds that UE supports two IP, this locality to produce, and then S-CSCF sends REGISTER to AS, carries out third-party registration, and this REGISTER information comprises the mark that UE supports that two IP, this locality are produced;
S725, AS receive after the third-party registration that there is this locality in the information of supporting two IP, this locality to produce UE, the session that UE participated in after this information will be used for;
S726, AS sends third-party registration to S-CSCF and successfully responds.
UE after one of method of using above three examples to provide is finished registration, just might session afterwards in use this locality produce and served, can adopt this locality to produce specific to each session, must rely on the decision-making of each conversation procedure IMS network.Below two examples will store that UE supports locally to produce with P-CSCF, the situation explanation UE of two IP address informations is respectively as the flow process of calling and called.
Fig. 8 is the embodiment flow process of exhaling the successfully registration of the present invention back UE beginning, comprises the steps:
S801, the user terminal UE that can support to produce function more than an IP address and this locality is after completing successfully registration, and UE attempts to use one of them IP, has initiated an INVITE request that comprises this IP information;
S802, PWG-1 receive after the INVITE, and INVITE is transmitted to corresponding P-CSCF;
S803, P-CSCF judge that UE has shown and support this locality to produce service when registration, then carry out strategy consulting to PCRF-1, if UE does not support this locality to produce service, then jump to S813 and carry out, otherwise continue execution S804;
S804, P-CSCF carries out strategy request to PCRF-1, obtains the policy information that PCRF-1 returns;
S805, the policy information that P-CSCF returns according to PCRF-1, whether decision UE this can adopt this locality to produce service, and the possibility of result of decision has: can adopt this locality to produce, must adopt this locality to produce, can not adopt this locality to produce; And judge according to the result and can adopt the IP among this INVITE to carry out this session, if can, S813 is carried out in redirect, otherwise carries out S806;
S806～S807, P-CSCF have refused this request, will refuse to be dealt into UE after response is transmitted by PGW-1;
S808, UE receive the refusal response that IMS sends, and find that another one IP also can be used for session, then adopt another IP to initiate a session request, if UE does not have other IP to adopt, following steps are no longer carried out in then this conversation failure;
S809, PWG-1 issues P-CSCF with new INVITE request;
S810, P-CSCF judge that UE has shown and support this locality to produce service when registration, then carry out strategy consulting to PCRF-1, if UE does not support this locality to produce service, then jump to S813 and carry out, otherwise continue execution S811;
S811, P-CSCF carries out strategy request to PCRF-1, obtains the policy information that PCRF-1 returns;
S812, the policy information that P-CSCF returns according to PCRF-1, whether decision UE this can adopt this locality to produce service, the possibility of result of decision has: can adopt this locality to produce, must adopt this locality to produce, can not adopt this locality to produce, and judge according to the result and can adopt the IP among this INVITE to carry out this session, if of course, continue to carry out S813, otherwise S806 is carried out in redirect;
S813～S814, P-CSCF is forwarded to opposite end UE (terminal that is about to carry out with UE session among the present invention is called opposite end UE) with INVITE request by S-CSCF;
S815～S822, opposite end UE return Offer and respond, and are delivered to UE by IMS, and UE successfully carries out flow processs such as resource reservation after receiving that Offer responds.
Opposite end UE has answered session after ring, between UE and opposite end UE, one is used the local media session that produces service just can set up like this, and this session is set up by PGW-2.
Fig. 9 is the embodiment flow process that successfully registration back UE of the present invention exhales eventually, comprises the steps:
S901～S902, opposite end UE calls out UE, and the INVITE request is sent to the IMS network, after being transmitted by S-CSCF, arrives the P-CSCF that service is provided for UE;
S903, P-CSCF judge that UE has shown and support this locality to produce service when registration, then carry out strategy consulting to PCRF-1, if UE does not support this locality to produce service, then jump to S906 and carry out, otherwise continue execution S904;
S904, P-CSCF carries out strategy request to PCRF-1, obtains the policy information that PCRF-1 returns;
S905, the policy information that P-CSCF returns according to PCRF-1, whether this can adopt this locality to produce service to judge UE, and the possibility of result of judgement has: can adopt this locality to produce, must adopt this locality to produce, can not adopt this locality to produce; And use sign to join in the INVITE request result of determination;
S906～S907, P-CSCF sends to UE with the INVITE request by PGW-1;
S908, UE receives after the INVITE request, to use which IP and opposite end UE to carry out session according to the rule decision, its decision rule is: if added the sign described in the S905 among the INVITE, the IP that selects for use can not conflict mutually with the content of sign, if do not find sign among the INVITE, then be defaulted as and adopt this locality to produce service; Produce Offer thus and respond, send to the IMS network;
S909～S919, IMS network respond Offer and issue opposite end UE, and UE successfully carries out flow processs such as resource reservation.
Opposite end UE has answered session after ring, between UE and opposite end UE, one is used the local media session that produces service just can set up like this, and this session is set up by PGW-2.
Above-mentioned two examples are that P-CSCF has stored that UE supports locally to produce, the situation of two IP address informations, if S-CSCF or certain application server for storage UE support that this locality is produced, two IP address information, catch up with then that to state flow process similar, just judge that by the network element of preserving described information whether described UE supports this locality to produce service, repeats no more herein.
This shows that method provided by the invention is changed little to existing IMS network technology, only relate to the modification of indivedual network elements, the interpolation of local flow process, and the suitable modification of header field, little to existing framework influence, if upgrade from existing IMS network technology, cost, risk are all very little.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (14)
1. a terminal local solution that produces in IP Multimedia System IMS comprises the steps:
(1) user terminal UE sends to the IMS network in registration/when heavily registering, add UE and have more than an IP address in registration/heavy register requirement, and support the mark that this locality is produced;
(2) the IMS network judges whether this UE can use two IP addresses, and this locality produces and carry out session, if judge and can use, and then two IP of IMS network adding system support in registration reply message and the local mark that produces; The IMS network is preserved this UE and whether is supported two IP addresses and whether possess the ability information that session is produced in this locality.
2. the method for claim 1, it is characterized in that, described step (1) UE sends before the registration/weight register requirement, confirm self whether to support two IP and this locality to produce, if support then check whether have two IP addresses at present, and distinguish these two IP addresses respectively by which network allocation, whether support this to produce.
3. the method for claim 1 is characterized in that, in the described step (1), when UE has more than an IP address, and wherein has the corresponding this locality of supporting of IP to produce service, adds in the information header of register requirement and supports two IP marks; Described mark adds label by expansion Session initiation Protocol SIP header or in existing SIP header to be realized.
4. the method for claim 1 is characterized in that, in the described step (1), when UE supports that this locality is produced, adds in the information header of register requirement and supports this locality to produce mark; Described mark adds label by expansion SIP header or in existing SIP header to be realized.
5. the method for claim 1 is characterized in that, in the described step (2), can not use two IP addresses if the IMS network is judged this UE, and this locality produces and carry out session, then adds in the registration response and does not support two IP and the local mark that produces.
6. the method for claim 1, it is characterized in that, in the described step (2), the network based operator of IMS local policy, user of current roaming situation, roaming place and the local operator situation of contracting, and the signatory state information of this user judges whether this UE can use two IP addresses, and this locality is produced and carried out session.
7. method as claimed in claim 6, it is characterized in that, in the described step (2), carry out described judgement by P-CSCF in the IMS network or S-CSCF, it obtains basis for estimation is from this locality acquisition or from other network element, comprises that policy control and charging rule functions, Certificate Authority statistical server obtain.
8. the method for claim 1, it is characterized in that in the described step (2), the P-CSCF in the IMS network transmits when succeeding in registration response, perhaps S-CSCF sends before the response of succeeding in registration, and adds at the success response header and supports this locality to produce and two IP mark; Described mark adds label by expansion SIP header or in existing SIP header to be realized.
9. the method for claim 1 is characterized in that, in the described step (2), after S-CSCF finishes authentication to UE in the IMS network, whether supports two IP addresses and whether possesses the ability information that session is produced in this locality at this UE of local record; And/or whether P-CSCF supports two IP addresses and whether possesses the ability information that session is produced in this locality at this UE of local record when response is succeeded in registration in forwarding.
10. the method for claim 1, it is characterized in that, in the described step (2), using an application server to store UE supports two IP addresses and possesses the ability information that session is produced in this locality: when UE in the registration of IMS network, S-CSCF finds that UE supports two IP addresses or possess this locality to produce ability, just carry out third-party registration, support two IP addresses and possess the ability information that session is produced in this locality by this application server for storage UE at this application server.
11. the method for claim 1, it is characterized in that, rise at UE and to exhale or when eventually exhaling session, whether the UE of storage supports two IP addresses and whether possesses this locality to produce the ability information of session and judge that can this session carry out this locality and produce during the network based registration of IMS.
12. method as claimed in claim 11 is characterized in that, judges that by the P-CSCF in the IMS network of the described information of storage or S-CSCF or application server can carry out this locality produces.
13. method as claimed in claim 11 is characterized in that, supports this locality to produce when the IMS network has this UE, and has the information of two IP, then carries out whether can carrying out the judgement that this locality is produced, otherwise does not need to judge.
14. method as claimed in claim 11 is characterized in that, if described UE receives by the local response of producing of IMS network refusal, then judges currently whether also have other IP address to can be used for session, if having, then uses other IP to initiate new call request.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102970303A (en) * | 2012-12-04 | 2013-03-13 | 北京开元智信通软件有限公司 | Singlechip microcomputer double-IP (Internet Protocol) communication method |
| CN104426764A (en) * | 2013-09-05 | 2015-03-18 | 国际商业机器公司 | Method and system for double-IP-address recovery |
| CN106550000A (en) * | 2015-09-23 | 2017-03-29 | 中国电信股份有限公司 | Policy control method and system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107567027B (en) * | 2016-06-30 | 2021-04-20 | 中兴通讯股份有限公司 | RCS terminal network switching processing method, device, equipment and mobile terminal |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372338C (en) * | 2003-10-23 | 2008-02-27 | 华为技术有限公司 | Method for realizing local business in IP multimedia sub-system |
| CN100353808C (en) * | 2004-06-07 | 2007-12-05 | 华为技术有限公司 | Method for processing local service in mobile network IP multimedia sub-system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102970303A (en) * | 2012-12-04 | 2013-03-13 | 北京开元智信通软件有限公司 | Singlechip microcomputer double-IP (Internet Protocol) communication method |
| CN104426764A (en) * | 2013-09-05 | 2015-03-18 | 国际商业机器公司 | Method and system for double-IP-address recovery |
| CN104426764B (en) * | 2013-09-05 | 2017-12-05 | 国际商业机器公司 | The method and system recovered for dual IP address |
| CN106550000A (en) * | 2015-09-23 | 2017-03-29 | 中国电信股份有限公司 | Policy control method and system |
| CN106550000B (en) * | 2015-09-23 | 2019-04-16 | 中国电信股份有限公司 | Policy control method and system |
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