CN1716965A

CN1716965A - Multimedia system

Info

Publication number: CN1716965A
Application number: CN 200410048253
Authority: CN
Inventors: 王洁
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2004-06-14
Filing date: 2004-06-14
Publication date: 2006-01-04
Anticipated expiration: 2024-06-14
Also published as: CN100496053C

Abstract

This invention discloses an IP multimedia system including an IP multimedia process unit for processing user network acc control, call/session control and service process, an attribute user server being a functional entity independent of load networks including IP process interface relating to said IP multimedia process unit used to record related user and service information needed by the multimedia process unit and support the IP system functions to match with the IP unit to finish the network acc control, call/session control and service process of users. The HSS in IMS of this invention only includes IMS function and the non-IMS function is not included, which can provide general IMS to access different load networks.

Description

The IP multimedia system

Technical field

The present invention relates to communication technical field, refer to a kind of IP multimedia system that can be applicable in the various communication carrier networks especially.

Background technology

Along with the development of mobile communication technology, traditional voice communication service can not satisfy people's communication requirement, and people press for and experience brand-new multimedia service.Described multimedia service is not only simple video and audio communication business, also comprises instant message, with the business that browses the location, collaborative work, Streaming Media or the like business, particularly new traffic mode and conventional voice communications merge.

At present, trend in view of the Internet and telecommunications network fusion, third generation partner program (the 3GPP of International Standards Organization, The 3rd Generation Partnership Project) on the basis of packet carrying network, introduced the IP Multimedia System (IMS that supports the all-IP business network framework of multimedia service, IPMultimedia Subsystem), the target of IMS is the user data according to personalization, the shielding user mode access, the degree of opening of control professional ability provides brand-new multimedia communication experiences.

With reference to shown in Figure 1, IMS entity and interface schematic diagram for 3GPP definition at present, topmost functional entity is controlling call entity (CSCF, Call Session Control Function) and home subscriber server (HSS, Home Subscriber Server) among the IMS.

Wherein, CSCF has three types: serving CSCF (S-CSCF, Serving-Call SessionControl Function), proxy CSCF (P-CSCF, Proxy-Call Session Control Function), inquiry CSCF (I-CSCF, Interrogating-Call Session Control Function).P-CSCF is subscriber equipment (UE, User Equipment) at first contact point of IMS system, finish agency (Proxy) function, accept initial session protocol (SIP, Session Initiation Protocol) message also may be carried out respective handling, then with its forwarding.I-CSCF finishes network concealed function, and I-CSCF was to HSS inquiry and determine the S-CSCF that the user serves when the user registered.The call state of S-CSCF recording user is finished CCF, is topmost operation controlling entity.Different S-CSCF is because the application server AS difference that is connected can be finished different business functions.

In addition, HSS writes down each IMS user's user profile and business datum, cooperates CSCF to finish most important routing function, roaming function, and HSS provides authentication, mandate, IMSI/IP map addresses, position location functionality or the like simultaneously.Wherein user profile comprises: Subscriber Number, address information; The security information that is used for authentication and authorization; Support the positional information between user's registration, record different system; User characteristic data etc., business datum then comprise service trigger criteria and the professional logic etc. that triggers.

In addition, in the IMS system, also comprise borde gateway controlled function entity (BGCF, BorderGateway Control Function), MGCF entity (MGCF, Media GatewayControl Function) and IP multimedia domain, MMD media gateway (IM-MGW, IP Multimedia system-Media GateWay) finishes IMS and other internetwork intercommunication, and media resource function point (MRFP, Media Resource Function Point) and media resource controlled function entity (MRFC, MediaResource Function Control) realizes media resource function, playback promptly is provided, resources such as meeting.

In the definition of current 3GPP network frame and each functional entity, HSS also realizes the function of non-IMS except that finishing the IMS function, the IMS function refers to provide the IP multimedia function to support the IMS controlled function, makes the user can use the IMS business, and this IP multimedia function is independent of the Access Network that is used for inserting IMS; Non-IMS function comprises circuit switching (CS, Circuit Switched) territory and packet switching (PS, Packet Switched) the needed attaching position register (HLR in territory, Home Location Register) function, HLR can think the subclass of HSS, support PS territory entity such as GPRS Support Node (GSN, GPRS Support Node), make the user insert PS territory business; Support CS territory entity as (G) MSC/ (G) MSC server simultaneously, make the user insert CS territory business, support and the internetwork roaming in traditional GSM/UMTS CS territory.

With reference to figure 2, be the logic function schematic diagram of prior art HSS, the HSS logic function is not divided according to IMS function and non-IMS function, and promptly IMS function and non-IMS function all comprise these logic functions.From interface, C interface is HSS and GMSC interface, D interface is HSS and MSC interface, Gr interface is HSS and SGSN interface, the Gc interface is HSS and GGSN interface, Sh interface is HSS and SIP AS interface, and the Si interface is HSS and IM-SSF interface, and Cx interface is HSS and CSCF interface.Wherein Sh, Si, Cx interface are IMS function relevant interfaces, and all the other interfaces are non-IMS function relevant interface, and promptly the HLR relevant interface is responsible for CS and PS territory correlation function.

Along with development of Communication Technique, IMS will be applied to Universal Mobile Telecommunications System (UMTS, UniversalMobile Telecommunications Systems) other network outside the network, comprise wired or wireless, mobile network or fixed network, for example cdma2000 network and fixed network next generation network (NGN, NextGeneration Network).HSS is as the functional entity of the IMS of 3GPP definition, IMS function and non-IMS function have been comprised at present, for networks of different type, IMS function and non-IMS function are bundled, flexibility is very poor, for example, and for the next generation network NGN of fixed network, the access of user terminal may be by fixedly netting twine connection, and at this moment HSS just only needs the IMS function; For the cdma2000 network, HSS then needs IMS function and non-IMS function, but because the network type difference, its non-IMS funtion part is different, promptly needs the user profile of recording different types network, and needs the distinct interface of setting and different type network entity.

Because non-IMS function (being the HLR part among the HSS) is different at networks of different type, for example for WCDMA network and CDMA2000 network, just need to adopt corresponding network interface and user profile, and some carrying access network not necessarily needs the HLR function, and only need IMS function among the HSS, as the NGN network.In a HSS equipment, will make this HSS equipment not have versatility IMS function and non-IMS function synthesized, and then network construction cost is increased dissimilar bearer networks.

Summary of the invention

The technical problem that the present invention solves provides a kind of general IP multimedia system, with the development of further adaptation future network.

For addressing the above problem, IP multimedia system of the present invention comprises the IP multimedia processing unit that is used for process user network insertion control, call/session control and Business Processing, also comprises in addition:

Home subscriber server, described home subscriber server is the functional entity that is independent of bearer network, comprise and the relevant IP Processing Interface of described IP multimedia processing unit, be used to write down described IP multimedia processing unit processes relevant user information and business information required, that support IP multimedia system function, finish user's network insertion control, call/session control and Business Processing to cooperate described IP multimedia processing unit.

Wherein, the relevant user information of described support IP multimedia system function comprises: the service quality information of positional information, IP media user between IP Multimedia Private Identity, IP media user public identify, IP media user security information, IP media user system.

Wherein, the related service information of described support IP multimedia system function comprises: IP multimedia service CAMEL-Subscription-Information, IN service CAMEL-Subscription-Information, business processing logic.

Wherein, described IP multimedia system function comprises: the mobile management of IP multimedia system, IP multimedia system identification process produces IP multimedia system user security information, supports the mandate of IP multimedia system business, support the fail safe of IP multimedia system user, IP multimedia system insertion authority supports the IP multimedia system business to provide, and supports IP multimedia system applied business, support the session of IP multimedia system to set up, and support IN service.

Wherein, described IP multimedia processing unit comprises:

Call Control Unit is used to realize fail safe processing, the call/session control of the encrypting and decrypting of the mobile management of IP multimedia system, user's access authentication, customer service mandate, information;

The initial session protocol application server element is used to realize various applied business processing;

IP multimedia system business exchange functional unit is used for external service control point to realize IN service;

Described IP Processing Interface comprises:

With the interface of described Call Control Unit, be used for described home subscriber server and transmit user security parameters, user service information to described Call Control Unit; Be used for described Call Control Unit transmits ability information from described Call Control Unit to described home subscriber server, session signaling transmission parameter simultaneously;

With the interface of described initial session protocol application server element, be used for described home subscriber server to described initial session protocol application server business transferring relevant information and user related information; And

With the interface of described IP multimedia system business exchange functional unit, be used for described home subscriber server and transmit the IN service CAMEL-Subscription-Information to described IP multimedia system business exchange functional unit.

Compared with prior art, the present invention has following beneficial effect:

At first, HSS only comprises the IMS function in the IMS multimedia system provided by the invention, and non-IMS function is divided away, can provide general IMS to insert different bearer networks, for example, and mobile communications network and fixed network NGN.

Further, utilize the present invention only need build unified IMS network, the network institute that can be different access styles is public, the attaching position register function relevant with carrying then can be provided with according to the concrete needs of access network type, need the attaching position register function as the UMTS mobile network, fix N GN network can be with or without independently attaching position register function, wireless local access network (WLAN, Wireless Local Access Network) network does not then need the attaching position register function.

Description of drawings

Fig. 1 is the composition schematic diagram of prior art IP multimedia system;

Fig. 2 is the home subscriber server logic function schematic diagram that Fig. 1 illustrates;

Fig. 3 is the composition schematic diagram of IP multimedia system of the present invention;

Fig. 4 is that the logic function that the prior art home subscriber server is divided according to IMS function and non-IMS function is formed schematic diagram;

Fig. 5 is the logic function schematic diagram of the home subscriber server of the present invention illustrated of Fig. 3;

Fig. 6 is the integrated attaching position register logic function schematic diagram of prior art home subscriber server;

Fig. 7 is the Principles of Network schematic diagram that the present invention realizes IMS;

Fig. 8 is that the IP multimedia system that UMTS of the present invention inserts is formed and the interface schematic diagram;

Fig. 9 is that the IP multimedia system that CDMA2000 of the present invention inserts is formed and the interface schematic diagram.

Embodiment

Prior art IMS is owing to be integrated in IMS function and non-IMS function among the HSS together, be unfavorable for the expansion of network in the future, therefore, core of the present invention is to provide a kind of general IMS system, the IMS function is separated with bearer network, can insert different bearer networks,, support following complete IP network carrying to adapt to the development of future network.

With reference to figure 3, be the composition schematic diagram of IMS of the present invention, only keep the relevant entity of IMS function among the IMS of the present invention, as shown, IMS of the present invention only comprises IP multimedia processing unit 31 and only comprises the home subscriber server 32 of IMS function, is respectively described below:

IP multimedia processing unit, its function is same as the prior art, be mainly used in the IP multimedia processing unit of process user network insertion control and calling/assorted words control and Business Processing, concrete, described multimedia processing unit can be handled resource by Call Control Unit, initial session protocol application server element, IP operation exchange functional unit and some other multimedias and form.

Wherein said Call Control Unit, its function is same as the prior art, is mainly used in fail safe processing, the call/session control of the encrypting and decrypting of realizing the mobile management of IP multimedia system, user's access authentication, customer service mandate, information;

The initial session protocol application server element, its function is same as the prior art, is mainly used in to realize various applied business processing;

The IP operation exchange functional unit, its function is same as the prior art, is mainly used in external service control point and realizes IN service.

And the home subscriber server 32 that the present invention realizes, for being independent of the functional entity of bearer network, comprise relevant IP Processing Interface with described IP multimedia processing unit 31, be used to write down IP multimedia processing unit processes relevant user information and service data information required, that support IP multimedia system function, finish associated user's network insertion control and call/session control and treatment and Business Processing to support described IP multimedia processing unit 31.

Wherein, described home subscriber server is provided with the interface with described Call Control Unit, be used for described home subscriber server and transmit user security parameters, user service information, be used for described Call Control Unit transmits ability information from described Call Control Unit to described home subscriber server, session signaling transmission parameter simultaneously to described Call Control Unit.

In addition, described home subscriber server also is provided with the interface with described initial session protocol application server element, be used for described home subscriber server and transmit transparent data, comprise service related information and user related information to described initial session protocol application server.

In addition, described home subscriber server also is provided with the interface with described IP operation exchange functional unit, is used for described home subscriber server and transmits the IN service CAMEL-Subscription-Information to described IP operation exchange functional unit.

Because home subscriber server 42 of the present invention is only realized the IP multimedia and is handled relevant IMS function, and the non-IMS function that other are relevant with access way and bearer network is separated, realize the relevant non-IMS function of IMS separately by each bearer network, therefore, IMS of the present invention will have versatility, the IMS function is separated with carrying, can insert various IP bearer network.

Contrast DESCRIPTION OF THE PRIOR ART improvement of the present invention below, at first please refer to Fig. 4, for prior art is divided home subscriber server according to IMS function and non-IMS function logic function is formed schematic diagram, as can be seen from the figure prior art comprises for realizing the indispensable IMS function of multimedia service, this kind IMS function and bearer network are irrelevant, it is the Core Feature of IMS, in addition, also comprise the non-IMS function relevant in the prior art with bearer network, promptly relevant attaching position register function with bearer network, for different bearer networks, provider location and the interface of realizing this non-IMS function are all inequality, even do not need the non-IMS function of this kind for some bearer network, therefore, cause the IMS of prior art to be unfavorable for inserting different IP bearer networks.

The following describes improvement of the present invention, with reference to figure 5, Fig. 6, the logic function schematic diagram that Fig. 5 supports for the home subscriber server that the present invention realizes, Fig. 6 is the logic function schematic diagram of the non-IMS function of dividing away from existing home subscriber server, for realizing the access independence of IMS, be IMS and the separating of bearer network, need redefine the HSS functional entity and the interface of IMS system, with former HSS entity division is two logical functional entities, one is retained among the IMS, finishes the IMS function among the former HSS; From IMS, peel off away for one, become the part of bearer network, finish non-IMS function among the former HSS.Two functional entitys after the separation are called HSS ' and HLR '.

Please contrast in the lump with reference to figure 4, Fig. 5, IMS of the present invention only realizes the logic function that IMS is relevant, and the IMS systemic-function of its support mainly comprises: IMS mobile management, IMS identification process, produce the IMS user security information, support the IMS service authorization, support the IMS user security, the IMS insertion authority, support the IMS business to provide, support the IMS applied business, support the IMS session to set up, and support IN service etc.

Please contrast in the lump with reference to figure 4, Fig. 6, the present invention is separated to the non-IMS function of existing techniques in realizing in the bearer network and realizes that its function in the bearer network support mainly comprises: mobile management, identification process, generation user security information, supporting business mandate, support user security, insertion authority, supporting business to provide, support applied business, support session to set up and support IN service etc.

Because HSS ' writes down each IMS user's user profile and business datum, cooperate CSCF to finish most important routing function, roaming function.Comprise that specifically the IMS user related information is as follows: user ID, number and address information; User security information, i.e. the network insertion control information of authentication and mandate; Customer position information supports that promptly the user registers, positional information etc. between saved system; User service information or the like.

HLR ' is arranged in the bearer network of IMS, is not that any bearer network all needs, and only meaningful to the mobile network, as GSM/UMTS and cdma2000 network, HLR ' is exactly the HLR that defines among these mobile networks.HLR ' supports that the user inserts PS territory business; Support the user to insert CS territory business simultaneously, support and the internetwork roaming in traditional C territory.Because the entity and the function of different mobile network's definition are variant, the user related information of HLR ' storage is specifically determined with the standard that interface meets the bearer network (being different mobile networks) of IMS.

Interrelated logic function to above-mentioned HLR ' is separated in the bearer network, realize by bearer network in requisition for described logic function, also different for different bearer network HSS ' and HLR ' position and interface, for example for UMTS network and cdma2000 network, HSS ' is different with interface with the position of HLR ' in network.And for fix N GN network, or by wlan network, then there is not HLR ' in IMS by the carrying of IP bearer network.

With reference to figure 7, the network diagram of the IMS system being separated with bearer network for the present invention, as shown, the invention provides an IMS who has nothing to do with access way and network type, be that user terminal can be linked among the general IMS by multiple wireless or wired mode, the entity of this IMS system separates with bearer network, for example described IMS can UMTS PS territory bearer network insert the IMS user terminal, PS territory bearer network that also can CDMA2000 inserts the IMS user terminal, perhaps the IP bearer network of WLAN inserts the IMS user terminal, can also insert the IMS user terminal by the IP bearer network of fixed network NGN.

Because IMS of the present invention only provides IMS relevant function, irrelevant with the access network type, therefore, all be suitable for for the bearer network of various different access waies, help in the future various IP bearer networks and insert, realize the network development trend that complete IP network carries.

Describe with specific embodiment below, with reference to figure 8, network diagram for the carrying of UMTS network, only illustrate among the figure with the present invention and improve relevant provider location and relevant interface, as shown, only provide the interface between the HSS ' of IMS function and SIP AS, IM-SSF, the CSCF to be respectively Sh interface, Si interface and Cx interface.Interface between HLR ' and MSC (Server), the GMSC (Server) is respectively D interface and C interface, and the interface between HLR ' and SGSN, the GGSN is respectively Gr interface and Gc interface.The existing interface of these interfaces and 3GPP agreement is consistent fully among the figure, and unique difference is that HSS ' and HLR ' are two functional entitys independently, have different address informations.Having in these network entities of interface with HSS ' and HLR ', or among the Signalling Transfer Point STP in the Signaling System Number 7 net (Signalling Transfer Point), domain name server (DNS) equipment such as (Domain Name Server), need configuration or resolve the HLR ' address information different with HSS '.

With reference to figure 9, network diagram for the cdma2000 network carrying, same, only illustrate among the figure with the present invention and improve relevant provider location and relevant interface, as shown, only provide the interface between the HSS ' of IMS function and SIPAS, IM-SSF, the CSCF to be respectively Sh interface, Si interface and Cx interface.Interface between HLR ' and MSC (Server), the GMSC (Server) is the ANSI-41 interface.The existing interface of these interfaces and cdma2000 network is consistent fully among the figure, and unique difference is that HSS ' and HLR ' are two functional entitys independently, have different address informations.Having in these network entities of interface with HSS ' and HLR ', or the Signalling Transfer Point (STP in the Signaling System Number 7 net, Signalling Transfer Point), name server (DNS, Domain Name Server) etc. in the equipment, need configuration or resolve the HLR ' address information different with HSS '.

To sum up, the present invention thoroughly separates IMS with bearer network by the HSS ' entity of independent IMS function among the definition IMS, thereby IMS is had and the irrelevant versatility of access, can be applicable to the IMS user terminal of all access waies.For the operator that a plurality of access networks are arranged, can build the IMS of a fusion, insert wireless or wired IMS user terminal simultaneously, in IMS, not necessarily to distinguish this user and which kind of access way to insert IMS by.

For example: certain operator has UMTS mobile network, fix N GN network and wlan network simultaneously, this network of three types is all supported IMS, at this moment just need in three kinds of networks, not set up independently IMS network respectively, the IMS network comprises equipment such as HSS ', CSCF, IM-SSF, SIP AS, build unified IMS network, mean HSS ' can with other IMS network equipment together, by the network of different access styles public.HLR ' then is provided with according to the concrete needs of access network type, needs HLR ' as the UMTS mobile network, and fix N GN network can be with or without independently HLR ', and wlan network does not then need HLR '.

The above only is a preferred implementation of the present invention, does not constitute the qualification to protection range of the present invention.Any any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.

Claims

1, a kind of IP multimedia system comprises the IP multimedia processing unit that is used for process user network insertion control, call/session control and Business Processing, it is characterized in that, also comprises:

2, IP multimedia system as claimed in claim 1, it is characterized in that the relevant user information of described support IP multimedia system function comprises: the service quality information of positional information, IP media user between IP Multimedia Private Identity, IP media user public identify, IP media user security information, IP media user system.

3, IP multimedia system as claimed in claim 1 is characterized in that, the related service information of described support IP multimedia system function comprises: IP multimedia service CAMEL-Subscription-Information, IN service CAMEL-Subscription-Information, business processing logic.

4, as each described IP multimedia system of claim 1-3, it is characterized in that, described IP multimedia system function comprises: the mobile management of IP multimedia system, IP multimedia system identification process, produce IP multimedia system user security information, support the mandate of IP multimedia system business, support the fail safe of IP multimedia system user, IP multimedia system insertion authority, support the IP multimedia system business to provide, support IP multimedia system applied business, support the session of IP multimedia system to set up, and support IN service.

5, IP multimedia system as claimed in claim 4 is characterized in that, described IP multimedia processing unit comprises:

Described IP Processing Interface comprises: