CN101455052A - S-cscf selection for application server originated requests - Google Patents
S-cscf selection for application server originated requests Download PDFInfo
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Abstract
A server includes a sending unit configured to send a location information request to a home server for querying a default server name and capabilities of a unregistered subscriber for whom the server is originating the location information request. The server also includes a processing unit, if the default server name is provided in a location information answer, configured to route the location information request to the default server name provided in the location information answer or configured to select a suitable function and the supported capabilities of the selected function. The server further includes an indicating unit configured to indicate in the location information request that the function should serve the location information request as an originating request.
Description
The cross reference of related application
The sequence number that the application requires on April 28th, 2006 to submit to is that 60/795,582 U.S. Provisional Patent Application and the sequence number submitted on August 21st, 2006 are the priority of 60/838,899 U.S. Provisional Patent Application.The theme of application cited above is included in as a reference.
Technical field
The present invention relates to service request and handle, and more particularly, relate to such scene, promptly in this scene, the application server representative does not start request to the user of IP subsystem register.
Background technology
The IP system, IP Multimedia System (IMS) for example utilizes SIP (SIP) to start and controls service request.Current, for example in 3GPP TS 23.228 and 24.229 standards, define and described the process that is used for the request of handling at IMS.Particularly, 5.65 clauses of 3GPP TS 23.228 (7.2.0 version) standard have defined when the current scene that does not start request to the user of IMS registration of application server representative.An important example that uses this scene is the voice call continuity call setup (voice call continuity call setup) described in 3GPP TR23.806 (7.0.0 version) and TS 23.206 (0.3.0 version) standard.In the voice call continuity scene, when from circuit commutative field startup call setup, call continuity function (its angle from IMS is an application server) be fixed (anchor) is in this calling, and its representative can to or can be come to send session initiation request to IMS to the calling party of IMS registration.
The 5.7.3 clause of 3GPP TS 24.229 (7.2.0 version) standard has been described and be used for the process that representative of consumer sends request in application server.According to current process, application server sends request to service-call service controlled function (S-CSCF).S-CSCF is the IMS element that the session control service is provided for mobile node, and it makes Virtual network operator can support this service.The function that is provided by S-CSCF comprises the mobile registration of management, maintain sessions, carries out alternately with other service, charge and fail safe.If the user registers to IMS, application server is known the address (under the situation that the user is registered) of S-CSCF from the third-party registration process or by inquiring about home subscriber server so.Yet, for the situation that the user does not register in IMS, the current solution that do not provide.
According to the 5.6.5 clause of 3GPP TS 23.228 standards, under the situation of unregistered procedures that starts, the S-CSCF in the home subscriber server will follow with current to stopping the principle of identity that non-registered users is stipulated.Yet as current defined, in order to stop the calling to non-registered users, S-CSCF is necessary to have unregistered termination service (unregistered terminating service).Otherwise home subscriber server will can not return the ability that is used for position enquiring, and thereby inquiry-call service controlled function (I-CSCF) will be refused this request rather than it is forwarded to stops S-CSCF (terminating S-CSCF).Therefore, although even the user does not have the unregistered services that starts, also can carry out the calling of representative of consumer and start, and, have unregistered termination service and be necessary in order to stop calling to non-registered users.
Summary of the invention
Embodiments of the invention relate to a kind of server that comprises transmitting element, described transmitting element is configured so that send location information request to attribution server, be used to inquire about the default server name and the ability of non-registered users, wherein, described server is that described non-registered users is initiated described location information request.Described server also comprises processing unit, if described default server name is provided in location information answer, then described processing unit is configured perhaps to be configured so that select the ability of being supported of appropriate functional and selected function so that the described default server name that provides in described location information answer is provided described location information request.Described server further comprises indicating member, and it is configured so that indicate in described location information request: described function should be used as described location information request origination request (originating request) and serve.
Another embodiment of the present invention relates to a kind of inquiry-CSCF that comprises receiving element, described receiving element is configured so that receive the location information request of the common identity that comprises non-registered users, and described location information request is used to indicate origination request.Described inquiry-CSCF also comprises processing unit and transmitting element, described processing unit is configured so that inquire about the user's who is associated with described common identity ability information to attribution server, and described transmitting element is configured so that when described attribution server receives location information answer, the information that is provided in the described location information answer in response to described location information request is provided, sends described location information request to default service function or selected service function.
Another embodiment of the present invention relates to a kind of method, and described method is used for: send location information request by the inquiry server to attribution server, so that inquire about the default server name and the ability of non-registered users; Reply from described attribution server receiving position information by described inquiry server; If described default server name is provided,, described location information request is routed to the default server name that in described location information answer, provides then by described inquiry server in described location information answer; And if in described location information answer, do not provide described default server name, then by described inquiry server, select the suitable function of the described user's of support described ability, wherein, described inquiry server is indicated in described location information request: described function should be used as origination request with described location information request and serve.
Another embodiment of the present invention relates to a kind of method, and described method is used for: receive the location information request of the common identity comprise the user by the inquiry function from application server, described location information request is used to indicate origination request; Inquire about the user's who is associated with described common identity ability information to service function; And depend on and the information that in location information answer, is provided send described location information request to default service function or selected service function in response to described location information request.
Another embodiment of the present invention relates to a kind of equipment, and described equipment comprises: dispensing device, and it is used for sending location information request by the inquiry server to attribution server, so that inquire about the default server name and the ability of non-registered users; Receiving system, it is used for replying from described attribution server receiving position information by described inquiry server; Route device, it is used for described location information request being routed to the described default server name that provides by described inquiry server in described location information answer when described default server name is provided in described location information answer; And choice device, it is used for when described default server name is not provided in described location information answer, select the suitable function of the described user's of support ability, wherein, described inquiry server is indicated in described location information request: described function should be used as origination request with described location information request and serve.
Another embodiment of the present invention relates to a kind of equipment, and described equipment comprises: receiving system, and it is used for receiving the location information request of the common identity comprise the user by the inquiry function from application server, and described location information request is used to indicate origination request; Inquiry unit, it is used for by described inquiry function, inquires about the user's who is associated with described common identity ability information to service function; And dispensing device, it is used for depending on the information that is provided by described inquiry function in the location information answer in response to described location information request, sends described location information request to default service function or selected service function.
Description of drawings
Accompanying drawing is comprised to be provided further understanding of the present invention, and is included into and constitutes the part of this specification, description of drawings embodiments of the invention, described embodiment is used for explaining principle of the present invention with describing, in the accompanying drawings:
Fig. 1 has illustrated the embodiment of IP Multimedia System;
Fig. 2 has illustrated the step that is realized by the server of realizing embodiments of the invention; And
Fig. 3 has illustrated by the step that I-CSCF realized that realizes embodiments of the invention.
Embodiment
Now with reference to the preferred embodiments of the present invention, the example of described embodiment has been described in the accompanying drawings.
Fig. 1 has illustrated the embodiment of IP Multimedia System 100, can realize embodiments of the invention in this IP Multimedia System 100.Subsystem 100 comprises application-server layer 102, session control layer 104, and transmission and endpoint layer (transport and endpoint layer) 106.Subsystem 100 is unified architectures, and it supports the service of the wide scope of being enabled by the flexibility of SIP (SIP).Go out as shown in fig. 1, subsystem 100 can be supported a plurality of application servers, and it provides conventional telephone service 108 and non-telephone service 110, for example, and instant message transrecieving, PTT (push-to-talk) and video flowing.Transmission and endpoint layer 106 start and stop the SIP signaling, so that set up session and the carrying service is provided, for example, use real-time transport protocol (rtp) that speech is become Internet protocol (IP) grouping from the analog or digital format conversion.Session control layer 104 comprises CSCF (CSCF) 112, and it provides the registration of end points and the SIP signaling message is routed to suitable application server.CSCF 112 interacts with transmission and endpoint layer 106, thereby guarantees to stride the service quality of all services.Session control layer 104 also is included as home subscriber server (HSS) database 114 that each terminal use safeguards the unique service profile.Terminal use's service profile has been stored information on services and the preference of all users in middle position, comprise terminal use's current log-on message, roaming information, such as the telephone service of call forward information, such as the instant message transrecieving information on services of buddy list, and voice mail option.Application-server layer 102 comprises the application server that terminal use's service logic is provided.
According to the first embodiment of the present invention, when on behalf of unregistered IMS user, application server initiate to ask, application server sends location information request message by existing Sh interface to home subscriber server, is used to inquire about default server name and this user's ability.Should be noted in the discussion above that this ability can be compulsory or optional.If default server name is provided in the information answer/response of position, route requests to this default server name so, otherwise, the ability that application server is selected service call conversation control function suitable in the network (S-CSCF) and supported based on the ability that is received in location information answer.This information is configured to application server.Place the ORIG parameter by the URI to this S-CSCF, application server is indicated S-CSCF this request should be used as " starting " request in sip message and is served.
3GPP 29.228 (7.0.0 version) standard discloses the process that is used for the response position information request in home subscriber server.According to current process, if the user does not register in IMS, so only when when the user supplies unregistered services, home subscriber server just sends in location information answer messages as selects desired server-ability property value to (AVP) for S-CSCF.This makes the origination request of application server lose efficacy to such user, and promptly this user is without any the service that should move in unregistered state.So, in first solution that is realized in the first embodiment of the present invention, I-CSCF indicates to home subscriber server in location information request message: origination request is carried out place information inquiry.In this embodiment, if the user does not register to IMS, so for this location information request message that comprises the indication of the scene that starts, home subscriber server provides server-ability AVP in location information response message, do not have " starting " unregistered services even this user is current.In second solution that in the first embodiment of the present invention, is realized, if the user does not register to IMS, home subscriber server always provides server-ability AVP in location information response message so, even this user does not have current unregistered services.
In the second embodiment of the present invention, application server sends request to I-CSCF, and inserts user's common identity in P-Asserted-Identity (identity that P-asserts) header, and is desired as disclosing of the 5.7.3 clause of 3GPP24.229 standard.It is origination request that application server is indicated this to I-CSCF.I-CSCF (it is just serviced that it identifies this origination request) is to home subscriber server inquiry indicated user's in the P-Asserted-Identity header of SIP request ability information.That is to say, use is from the identity of P-Asserted-Identity header, rather than as the Request-URI in the termination situation (request-URI), by the Cx interface at the Public-IdentityAVP (public-identity AVP) of Cx message, I-CSCF sends location information request message to home subscriber server.When I-CSCF when home subscriber server receives response location information answer messages, I-CSCF or send request to default S-CSCF perhaps selects S-CSCF according to normal processes based on ability.Place the ORIG parameter by the URI to this S-CSCF, I-CSCF indicates in sip message: S-CSCF should be used as this request " starting " request and serve.Alternatively, when application server when I-CSCF sends the SIP request, application service is added the ORIG parameter URI of I-CSCF to, it is added to the route header of sip message as top.
Even in the second embodiment of the present invention, I-CSCF indicates to home subscriber server in location information request message: origination request is carried out place information inquiry.In this embodiment, if the user does not register to IMS, in first solution that is realized so in a second embodiment, for this location information request message that comprises the indication of the scene that starts, home subscriber server provides server-ability AVP in location information response message, even this user does not have " starting " unregistered services.In second solution that is realized in the second embodiment of the present invention, if the user does not register to IMS, home subscriber server always provides server-ability AVP in location information response message so, even this user does not have unregistered services.In order to realize second solution, do not need to expand Cx message, because only change is in the behavior of home subscriber server.In the I-CSCF process of handling location information answer messages, also do not need to change, thereby this solution is a backward compatibility for I-CSCF.
Be used to realize a kind of possible method of the second embodiment of the present invention:, come to indicate the scene that starts to I-CSCF by the URI parameter among the Request-URI that the ORIG sign is changed to sip message for application server.The Request-URI of sip message is resolved according to normal I-CSCF process by I-CSCF.If use this method, I-CSCF removes the ORIG sign from the Request-URI of sip message so.
In a second embodiment, operator can define special-purpose I-CSCF (disposing) in application server, and this special-purpose I-CSCF only serves the origination request to unregistered services, and it does not have the ability of selecting based on S-CSCF.In application server, must guarantee that I-CSCF supports that this is functional.
The another kind of possible implementation method of second embodiment is: define the new parameter that new SIP header or definition are used for the P-Asserted-Identity header, it comprises user's identifier.Whether if select this method, as the part of its normal processes, I-CSCF must resolve additional SIP header so, judge just in the service origination request for use in it.Should utilize new AVP to expand the location information request message of Cx interface, whether this new AVP comprises for being the indication that origination request is carried out location information request.New AVP can choose wantonly, thereby does not support the I-CSCF of the expansion of Cx interface still can work under this solution.Whether another alternative is to utilize about being that origination request has asked the information of place information inquiry to expand existing P ublic-IdentityAVP.
First embodiment requires the S-CSCF address and is configured to by the ability that those S-CSCF supported to be ready that representative of consumer initiates each application server of request.In addition, identical S-CSCF selects logic to be implemented in each application server, has been available in I-CSCF in other mode perhaps.Under the situation of first embodiment, in processing, relate to few role, and do not need SIP is made amendment origination request.Yet because trust problem, application server configuration S-CSCF information may not be preferred concerning operator.
Second embodiment depends on the existing force of the I-CSCF that is used for the S-CSCF selection.Application server does not need the configuration that adds, does not need capability-based S-CSCF to select in application server, although require to change in Session Initiation Protocol and in the I-CSCF behavior.First solution requirement of being realized in first and second embodiment is introduced new AVP or is changed existing P ublic-Identity AVP to position information request Cx message.In this solution, in I-CSCF and home subscriber server realization, all require to change, thereby this solution is not a backward compatibility for I-CSCF and home subscriber server.Second solution that is realized in first and second embodiment does not require the change in Cx message; It is only required in the change in the realization of home subscriber server; Thereby this solution is a backward compatibility for I-CSCF.
Fig. 2 has illustrated the step that is realized in realizing server of the present invention.In step 2010, I-CSCF sends location information request to home subscriber server, is used to inquire about the default server name and the ability of non-registered users.In step 2020, I-CSCF replys from the attribution server receiving position information.In step 2030, if default server name is provided in location information answer, I-CSCF default server name that location information request is routed in location information answer to be provided then.In step 2040, if default server name is not provided in location information answer, then I-CSCF selects the suitable function of this user's of support ability, and wherein, the inquiry server is indicated in location information request: this function should be used as origination request with location information request and serve.
Fig. 3 has illustrated by the step that realizes that I-CSCF of the present invention realized.In step 3010, I-CSCF receives the location information request of the common identity comprise the user from application server, and this location information request is used to indicate origination request.In step 3020, I-CSCF inquires about the user's who is associated with this common identity ability information to service function.In step 3030, the information that is provided in the location information answer in response to this location information request is provided, I-CSCF sends this location information request to default service function or selected service function.
It will be understood by those of skill in the art that and in any equipment of realizing network availability information described above, to utilize the present invention.Aforementioned description at be specific embodiment of the present invention.Yet, it is evident that, can carry out other variants and modifications to described embodiment, and reach its advantage part or all.Therefore, the purpose of claims is to contain all such variants and modifications that are in true spirit of the present invention and the scope.
Claims (27)
1. server, it comprises:
Transmitting element, it is configured to be used to inquire about the default server name and the ability of non-registered users so that send location information request to attribution server, and wherein, described server is that described non-registered users is initiated described location information request;
Processing unit, if described default server name is provided in location information answer, then described processing unit is configured perhaps to be configured so that select the ability of being supported of appropriate functional and selected function so that the default server name that provides in described location information answer is provided described location information request; And
Indicating member, it is configured so that indicate in described location information request: described function should be used as origination request with described location information request and serve.
2. according to the server of claim 1, wherein, described transmitting element is configured so that send location information message by existing interface.
3. according to the server of claim 1, wherein, described processing unit is configured so that select suitable service call conversation control function.
4. according to the server of claim 3, wherein, described indicating member be configured so that: by placing the parameter that starts in the URI of described service call conversation control function, the described function of indication should be used as origination request with described location information request and serve in described location information request.
5. according to the server of claim 1, wherein, if described location information request is indicated described function described location information request should be used as origination request and is served, then described processing unit is configured so that the property value that is received in the described location information answer is right, even described user does not have the unregistered services that starts.
6. according to the server of claim 1, wherein, described processing unit is configured so that the property value that is received in the described location information answer is right.
7. inquiry CSCF, it comprises:
Receiving element, it is configured so that receive the location information request of the common identity that comprises non-registered users, and described location information request is used to indicate origination request;
Acquiring unit, it is configured so that obtain described common identity from described location information request;
Processing unit, it is configured so that inquire about the user's who is associated with described common identity ability information to attribution server; And
Transmitting element, it is configured so that when described attribution server receives location information answer, the information that is provided in the location information answer in response to described location information request is provided, sends described location information request to default service function or selected service function.
8. according to the inquiry CSCF of claim 7, wherein, described processing unit be configured so that: use described user's common identity, send described location information request to described attribution server.
9. according to the inquiry CSCF of claim 7, wherein, described transmitting element be configured so that: based on the ability in the described location information answer, send described location information request to selected service function.
10. according to the inquiry CSCF of claim 7, wherein, by place the parameter that starts in the URI of service call conversation control function, described location information request is used to indicate origination request.
11. inquiry CSCF according to claim 7, wherein, described receiving element is configured so that receive described location information request, wherein, the described location information request parameter that will start is included in the URI of described inquiry CSCF, and it is added to described location information request and is in the route header of top.
12. inquiry CSCF according to claim 7, wherein, if described location information request is indicated described function described location information request should be used as origination request and is served, then described processing unit is configured so that the property value that is received in the described location information answer is right, even described user does not have the unregistered services that starts.
13. according to the inquiry CSCF of claim 7, wherein, described processing unit is configured so that the property value that is received in the described location information answer is right.
14. a method, it comprises:
By the inquiry server, send location information request to attribution server, be used to inquire about the default server name and the ability of non-registered users;
Reply from described attribution server receiving position information by described inquiry server;
If described default server name is provided,, described location information request is routed to the described default server name that in described location information answer, provides then by described inquiry server in described location information answer; And
If described default server name is not provided in described location information answer, then by described inquiry server, select the suitable function of the described user's of support ability, wherein, described inquiry server is indicated in described location information request: described function should be used as origination request with described location information request and serve.
15., wherein send described location information request and comprise: send described location information request by existing interface according to the method for claim 14.
16. according to the method for claim 14, wherein select appropriate functional to comprise: to select suitable service call conversation control function.
17. according to the method for claim 16, wherein the described function of indication should be used as described location information request origination request and serve and comprise in described location information request: place the parameter that starts in the URI of described service call conversation control function.
18. method according to claim 14, wherein receiving position information is replied and is comprised: serve if described location information request indicates described function described location information request should be used as origination request, the property value that then is received in the described location information answer is right, even described user does not have the unregistered services that starts.
19. according to the method for claim 14, wherein receiving position information is replied and comprised: the property value that is received in the described location information answer is right.
20. a method, it comprises:
Receive the location information request of the common identity comprise the user by the inquiry function from application server, described location information request is used to indicate origination request;
Inquire about the user's who is associated with described common identity ability information to attribution server; And
The information that is provided in the location information answer in response to described location information request is provided, sends described location information request to default service function or selected service function.
21. according to the method for claim 20, wherein the inquiry service function comprises: use described user's common identity, send described location information request to attribution server.
22. according to the method for claim 20, it further comprises:, use described location information request to indicate origination request by in the URI of service call conversation control function, placing the parameter that starts.
23. according to the method for claim 20, it further comprises:, use described location information request to indicate origination request by in the route header of inquiry CSCF, placing the parameter that starts.
24. method according to claim 20, it further comprises: serve if described location information request indicates described function described location information request should be used as origination request, the property value that then is received in the described location information answer is right, even described user does not have the unregistered services that starts.
25. according to the method for claim 20, it further comprises: the property value that is received in the described location information answer is right.
26. an equipment, it comprises:
Dispensing device, it is used for sending location information request by the inquiry server to attribution server, is used to inquire about the default server name and the ability of non-registered users;
Receiving system, it is used for replying from described attribution server receiving position information by described inquiry server;
Route device, it is used for described location information request being routed to the described default server name that provides by described inquiry server in described location information answer when described default server name is provided in described location information answer; And
Choice device, it is used for when described default server name is not provided in described location information answer, select the suitable function of the described user's of support ability, wherein, described inquiry server indicates described function described location information request should be used as origination request in described location information request to serve.
27. an equipment, it comprises:
Receiving system, it is used for receiving the location information request of the common identity comprise the user by the inquiry function from application server, and described location information request is used to indicate origination request;
Inquiry unit, it is used for inquiring about to attribution server by described inquiry function the user's who is associated with described common identity ability information; And
Dispensing device, it is used for depending on the information that is provided by described inquiry function in the location information answer in response to described location information request, sends described location information request to default service function or selected service function.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US79558206P | 2006-04-28 | 2006-04-28 | |
| US60/795,582 | 2006-04-28 | ||
| US60/838,899 | 2006-08-21 |
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| Publication Number | Publication Date |
|---|---|
| CN101455052A true CN101455052A (en) | 2009-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007800196284A Pending CN101455052A (en) | 2006-04-28 | 2007-04-24 | S-cscf selection for application server originated requests |
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| Country | Link |
|---|---|
| CN (1) | CN101455052A (en) |
| ZA (1) | ZA200810044B (en) |
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