CN1303793C

CN1303793C - Method for realizing application server communication

Info

Publication number: CN1303793C
Application number: CNB2005101035719A
Authority: CN
Inventors: 罗龙
Original assignee: Huawei Technologies Co Ltd
Current assignee: Yingweite SPE limited liability company
Priority date: 2004-09-21
Filing date: 2005-09-21
Publication date: 2007-03-07
Anticipated expiration: 2025-09-21
Also published as: CN1764140A

Abstract

The present invention discloses a method for realizing application server (AS) communication. The method comprises the following step: a first AS establishes a route to a second AS which can be at least one AS through an information management system (IMS) function entity for information interaction with the second AS. The method of the present invention can be used for realizing the information interaction between the ASes by using the route function of the IMS so as to realize information share and cooperation among multiple ASes. The method simplifies the network structure of a service layer and strengthens the service providing capability of an OSE. The present invention makes the information interaction among the ASes effective and compact, decreases the complexity of the information interaction among the ASes, avoids a complex searching and determining process, saves network resources and simultaneously strengthens the network capability of the IMS; besides, the present invention is favorable to smarter network disposition by an operator.

Description

A kind of method that realizes application server communication

Technical field

The present invention relates to the information tranmission techniques, be meant a kind of method that realizes application server communication especially.

Background technology

Development along with broadband network, mobile communication will not only be confined to traditional voice communication, multimedia service in conjunction with multiple medium types such as audio frequency, video, picture and texts will be carried out gradually, by with present business (presence), the combination of data services such as short message service, webpage (WEB) browse service, positioning service, propelling movement business (PUSH), file-sharing business can be satisfied user's multiple demand.

Under the promotion of multiple application, third generation partner program (3GPP) normal structure has been released the IP multimedia subsystem, IMS (IMS based on Internet protocol (IP), IP Multimedia Subsystem) framework, purpose are to provide standardized open architecture to support diversified multimedia application in communication network; And Open Mobile Alliance (OMA, Open Mobile Alliance) normal structure has been released OMA service environment (OSE, OMA Service Environment), as the business realizing layer on the IMS framework, provide more selection and abundanter impression to the user.

Fig. 1 shows the IMS configuration diagram, as shown in Figure 1, IMS is superimposed upon on the packet switching network, by call session management function (CSCF, Call Session Control Function), MGCF (MGCF, Media Gateway Control Function), media resource function (MRF, Multimedia Resource Function) and home signature user server functional entitys such as (HSS, HomeSubscriber Server) are formed.Difference in functionality according to the CSCF realization, can be divided into serving CSCF (S-CSCF), proxy CSCF (P-CSCF) and three logic entities of inquiry CSCF (I-CSCF) again, S-CSCF is the service switching center of IMS, can finish session control, peace preservation association's speech phase, managing user information, generation charge information, or the like; P-CSCF is the access point that subscriber equipment (UE) inserts IMS, user's registration be can finish, service quality (QoS) control and safety management carried out, or the like; I-CSCF realizes route querying, as the intercommunication between in the IMS territory and the IMS territory, the distribution of S-CSCF is managed, and external network and other IMS territories are hidden topology of networks and configuration, generates charge information, or the like.MGCF realizes the function of control gateway, realizes the intercommunication between IMS network and other networks; MRF provides media resource, as the folding and unfolding sound, information transmitted between the terminal is carried out encoding and decoding and multimedia conferencing bridge etc., comprise media resource function control (MRFC, Multimedia Resource Function Controller) and media resource function handle (MRFP, Multimedia Resource Function Processor).Store the subscription data of user in the IMS network and configuration information etc. among the HSS.Use Session initiation Protocol (SIP, Session InitiationProtocol) as session control protocol among the IMS.

Fig. 2 shows between OSE and the IMS information and carries out mutual schematic diagram, as shown in Figure 2, OSE mainly is made up of a plurality of AS, the AS that defines in OMA at present comprises the instant-press instant-speak speech service server (PoC Server) based on cellular system, what User Status was provided presents service server (Presence Server), can make the user realize group information storage and the Group and List Management Server (GLMS that obtains, Group List Management Server), device management server (DMServer, Device Management Server) etc., these AS and relevant support system, as charging entity, network management entity etc. have constituted OSE.The major function of IMS comprises professional ability, enabling capabilities and general ability, wherein, professional ability comprise the storage of session management, user data and read, event subscription and notice, message, meeting etc.; Enabling capabilities comprises charging etc.; General ability comprises safe connection, authentication, mandate, route etc.As the upper strata of IMS, these abilities that OSE will utilize IMS to provide.OMA is responsible for defining OSE, and according to OSE the requirement of IMS is proposed demand to IMS.3GPP is responsible for defining IMS, and is responsible for the interface between definition IMS and the OSE, and the interface between OSE and the IMS comprises ISC interface, Sh interface, Dh, Ut, Ro interface, Rf interface, Gm, Mb etc.Wherein, ISC interface is the interface between AS and the IMS, realizes that IMS is to functions such as calling control, sip event subscription and the notice of AS, sip messages; Sh interface is the interface between AS and the HSS, realizes the user contracting data that read and revise and change subscription of AS to user related data; Dh is the interface between AS and the scope of business function (SLF, ServiceLocator Function), has realized the inquiry of ASS to the HSS address; Ut is the interface between OSE client and the AS, has realized the operational capacity of user by OSE client configuration AS user data; Ro interface is the interface between AS and the online charging entity, has realized real time billing; Rf interface is the interface between AS and the offline charging entity, has realized offline charging; Gm is the interface between OSE client and the IMS, realizes functions such as interactive function, event subscription notice, message; Mb be AS by the Business Stream interface between IMS and the OSE client, transmit medium stream information.

In the practical application, the business for the user uses can combine a plurality of AS as required, for example, the server of several recreation is combined by the meeting processing server, for the user provides internet game, like this, must need to carry out between the AS information interaction.At present, the IMS specific definition user and user, the routing mechanism of user to AS, AS to the user; For the route between the AS, IMS requires AS to possess service capacity interactive managing (SCIM, Service Capability InteractionManager), and promptly IMS hypothesis OSE layer provides the routing mechanism between the AS.

The AS that Fig. 3 shows 3GPP definition carries out the schematic diagram of information interaction, as shown in Figure 3, when carrying out information interaction between the AS, provide professional device A S to carry out information interaction by SCIM and other AS, SCIM is the entity of the information interaction between the realization AS of 3GPP definition, and dotted line shown in the figure is to carry out mutual interface by SCIM between the AS, and solid arrow shown in the figure is the interface between OSE and the IMS, as ISC interface, Sh interface, Dh, or the like.3GPP incorporates SCIM within the scope of AS, for the specific implementation flow process between SCIM and the AS and undefined.

By above description as seen, SCIM must be set in OSE could realize information interaction between the AS, this just makes the network configuration more complicated of AS and operation layer need provide the server relevant with route at operation layer, causes network construction cost and network operation cost to increase greatly.

Summary of the invention

In view of this, the object of the present invention is to provide a kind of method that realizes application server communication, realize the information interaction between the application server.

In order to achieve the above object, the invention provides a kind of method that realizes application server communication, this method comprises steps A: the request that AS S-CSCF under self sends requirement and the 2nd AS sets up route;

B, a described S-CSCF provide described the 2nd AS sign to I-CSCF;

C, described I-CSCF return the address information of the 2nd S-CSCF under described the 2nd AS that obtains by DNS or the signatory HSS of described the 2nd AS to a described S-CSCF;

D, a described AS set up route according to address information and described the 2nd AS of described the 2nd S-CSCF.

Further comprise before the described steps A: an AS and a S-CSCF set up session, and the 2nd AS and the 2nd S-CSCF set up session.

A described AS and a S-CSCF set up session: an AS sends register requirement to I-CSCF, I-CSCF obtains a S-CSCF address information by the signatory HSS of an AS, transmit this register requirement to a described S-CSCF then, a S-CSCF responds this register requirement and an AS sets up session;

Described the 2nd AS and the 2nd S-CSCF set up session: the 2nd AS sends register requirement to I-CSCF, I-CSCF obtains the 2nd S-CSCF address information by the signatory HSS of the 2nd AS, transmit this register requirement to described the 2nd S-CSCF then, the 2nd S-CSCF to should register requirement and the 2nd AS set up session.

Described I-CSCF obtains a S-CSCF address information by the signatory HSS of an AS: I-CSCF obtains the signatory HSS address information of an AS by SLF, and I-CSCF obtains a S-CSCF address information by described HSS then;

Described I-CSCF obtains the 2nd S-CSCF address information by the signatory HSS of the 2nd AS: I-CSCF obtains the signatory HSS address information of the 2nd AS by SLF, and I-CSCF obtains the 2nd S-CSCF address information by described HSS then.

A described S-CSCF responds this register requirement and an AS and sets up session and be: a S-CSCF obtains the subscription data of an AS by the signatory HSS of an AS, returns the registration response to an AS then, sets up session with an AS;

Described the 2nd S-CSCF responds this register requirement and the 2nd AS and sets up session and be: the 2nd S-CSCF obtains the subscription data of the 2nd AS by the signatory HSS of the 2nd AS, returns the registration response to the 2nd AS then, sets up session with the 2nd AS.

Further comprise before the described steps A: the address information of configuration the one S-CSCF in an AS, the address information of configuration the 2nd S-CSCF in the 2nd AS.

Described step D comprises: an AS sends the session that carries the 2nd AS sign to a S-CSCF and sets up request, the one S-CSCF transmits the session that carries the 2nd AS sign to the 2nd S-CSCF and sets up request, after the 2nd S-CSCF receives that request is set up in session, send session according to the 2nd AS sign to the 2nd AS and set up request, after the 2nd AS receives that request is set up in session, return session by a S-CSCF and the 2nd S-CSCF to an AS and set up response, the session between a foundation and the AS.

A described AS and a S-CSCF set up session, further comprise before: carry out safety detection mechanism between an AS and the S-CSCF, if by safety detection mechanism, then an AS and a S-CSCF set up session; Otherwise, finish current flow process;

Described the 2nd AS and the 2nd S-CSCF set up session, further comprise before: carry out safety detection mechanism between the 2nd AS and the 2nd S-CSCF, if by safety detection mechanism, then the 2nd AS and the 2nd S-CSCF set up session; Otherwise, finish current flow process.

Described step D further comprises: an AS determines QoS parameter by a S-CSCF and the 2nd S-CSCF and the 2nd AS consulting service quality strategy.

Further comprise after the described step D: the 2nd AS returns response by the 2nd S-CSCF and a S-CSCF to an AS.

Described the 2nd AS is an above AS.

This method further comprises: a S-CSCF is toggled to third party AS according to the related service trigger condition.

Described trigger condition is configured among the S-CSCF; Or be configured among the signatory HSS of an AS, a S-CSCF by with described HSS obtain described trigger condition alternately.

According to the proposed method, by utilizing the routing function of IMS, make between the AS and set up information interaction passage by the functional entity among the IMS, realize the information interaction between the AS, and then realize information sharing and cooperative cooperating between a plurality of AS, simplify the network configuration of operation layer, strengthened the professional providing capability of OSE.By the present invention, can make the information interaction between the AS efficiently succinct, reduce the complexity of carrying out information interaction between the AS, avoided complicated and searched, deterministic process, save Internet resources, helped operator's on-premise network more neatly, also strengthened the network capabilities of IMS simultaneously.

Description of drawings

Fig. 1 shows the IMS configuration diagram;

Fig. 2 shows the schematic diagram that carries out information interaction between OSE and the IMS;

The AS that Fig. 3 shows 3GPP definition carries out the schematic diagram of information interaction;

Fig. 4 shows the schematic diagram that carries out information interaction among the present invention between AS;

Fig. 5 shows that AS carries out the information interaction flow chart by the IMS functional entity among the present invention;

Fig. 6 shows that AS and S-CSCF set up the session flow chart among the present invention;

Fig. 7 shows that AS1 and AS2 set up the session flow chart among the present invention;

Fig. 8 shows among the present invention and carries out information interaction embodiment one schematic diagram based on non-session between the AS;

Fig. 9 shows among the present invention and carries out information interaction embodiment two schematic diagrames based on non-session between the AS;

Figure 10 shows among the present invention and carries out information interaction embodiment three schematic diagrames based on non-session between the AS;

Figure 11 shows and directly carries out the information interaction flow chart among the present invention between the AS.

Embodiment

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

Among the present invention, by utilizing the routing function of IMS, realize setting up information interaction passage by the functional entity among the IMS between the AS, and then realize information sharing and cooperative cooperating between a plurality of AS, simplify the network configuration of operation layer, strengthen the professional providing capability of OSE.

Fig. 4 shows the schematic diagram that carries out information interaction among the present invention between AS, as shown in Figure 4, because AS not only uses for the user, also need use for other servers, therefore, need provide rational information interaction scheme for AS, guarantee the information sharing between the AS, dotted line shown in the figure is the logic interfacing between the AS, at first need the SIP signaling of IP multimedia service route (ISR, IPMultimedia Service Routing) to set up information interaction passage between AS, can carry out the information interaction between AS then by the passage of setting up by four-headed arrow among the figure, this passage can be the transmission network between the AS, as IP network, ATM(Asynchronous Transfer Mode) network etc.; This passage also can be the transmission channel between AS and the IMS functional entity, promptly carries out information interaction by the IMS functional entity between AS, as SIP Message etc.

Fig. 5 shows that AS carries out the information interaction flow chart by the IMS functional entity among the present invention, and as shown in Figure 5, AS may further comprise the steps by the implementation procedure that the IMS functional entity carries out information interaction:

Step 501～step 502: for guaranteeing communication security, can between AS and IMS functional entity, increase safety detection mechanism, as carrying out authentication between AS1 and the IMS functional entity mutually, carry out authentication between AS2 and the IMS functional entity mutually, if both sides all by the other side's authentication, then proceed follow-up information interaction.

Step 503～step 504:AS1 sends the information that carries the AS2 sign to the IMS functional entity, and the IMS functional entity is transmitted the information of receiving according to the AS2 sign of receiving to AS2.

After step 505～step 506:AS2 receives information, send the response that carries the AS1 sign to the IMS functional entity, the IMS functional entity is transmitted the response of receiving according to the AS1 sign of receiving to AS1, and the information A S2 of its transmission of notice AS1 receives.

Because IMS complex structure, network element, interface are numerous, position difference according to the AS place, can carry out information interaction by each network element among the IMS between the AS, as CSCF, SLF, MGCF, BGCF, MRF etc., because AS is basic identical by the mode that each network element among the IMS carries out information interaction, below be that example is elaborated to specific implementation of the present invention by CSCF only with AS.

The mode of carrying out information interaction between the AS has dual mode substantially, a kind of information interaction mode that is based on session, a kind of information interaction mode that is based on non-session.

Conversation-based information interaction mode is meant between the AS and realizes information interaction by the session of setting up.Before setting up session between the AS, realizing the information interaction between the AS by the routing capabilities of IMS, AS at first needs to insert IMS, sets up session with the IMS functional entity.AS can set up the session with the IMS functional entity by the mode of registering in the IMS functional entity.

Fig. 6 shows that AS and S-CSCF set up the session flow chart among the present invention, and as shown in Figure 6, the implementation procedure that AS and S-CSCF set up session may further comprise the steps:

Step 601～step 603:AS sends the register requirement that carries self identification to I-CSCF.After I-CSCF receives register requirement, send the HSS query requests carry the AS sign to SLF, inquiry corresponding to the HSS at the data place of corresponding AS, be the signatory HSS of AS.After SLF receives query requests, search the HSS that stores the corresponding subscription data of this AS, return the HSS inquiry response that carries the HSS address information to I-CSCF then according to the AS sign.

After step 604～step 605:I-CSCF receives the HSS inquiry response, send the S-CSCF query requests that carries the AS sign to corresponding HSS according to the HSS address information.HSS receives the S-CSCF query requests, subscription data according to corresponding AS, obtain the ability information of the desired S-CSCF of this AS, determine to satisfy the S-CSCF of this ability information then, and return the S-CSCF inquiry response that carries the S-CSCF address information to I-CSCF.

After step 606～step 608:I-CSCF receives the S-CSCF inquiry response, send the register requirement that carries the AS sign to corresponding S-CSCF according to the S-CSCF address information.After S-CSCF receives register requirement, send the subscription data request that carries the AS sign to HSS according to the AS sign.After HSS receives the subscription data request, identify the subscription data of searching this AS, return the subscription data response that carries AS sign and subscription data to S-CSCF then according to AS.If HSS does not allow AS and S-CSCF to set up session, then directly return the subscription data response that carries respective identification to S-CSCF, then the S-CSCF refusal is set up session with AS, promptly refuses the registration of AS.

Step 609:S-CSCF identifies according to AS, returns the registration response to corresponding AS, and whether notice AS allows its registration.

In addition, also can be in AS the address information of pre-configured S-CSCF, like this, AS can be directly set up session with the S-CSCF of configuration, the registration process that is used to set up session described above can be omitted.

Fig. 7 shows that AS1 and AS2 set up the session flow chart among the present invention, and as shown in Figure 7, AS1 sets up session with S-CSCF1, and AS2 sets up session with S-CSCF2, and under the situation based on Session Initiation Protocol, the implementation procedure that AS1 and AS2 set up session may further comprise the steps:

Step 701～step 703:AS1 sends the Invite message that carries the AS2 sign to S-CSCF1.After S-CSCF1 receives Invite message, send the Invite message that carries the AS2 sign to S-CSCF2.After S-CSCF2 receives Invite message, send Invite message to AS2 according to the AS2 sign.

S-CSCF1 can obtain the address information of S-CSCF2 by I-CSCF, be that S-CSCF1 provides AS2 sign to I-CSCF, the address information of S-CSCF2 is provided with request I-CSCF, I-CSCF request HSS or name server (DNS) inquiry are corresponding to the S-CSCF2 of AS2, return the address information of S-CSCF2 by HSS or DNS, thereby obtain the address information of S-CSCF2.

After step 704～step 706:AS2 receives Invite message, return the 200 OK response that carries the AS1 sign to S-CSCF2; After S-CSCF2 receives 200 OK response, return the 200 OK response that carries the AS1 sign to S-CSCF1 according to the AS1 sign; After S-CSCF1 receives 200 OK response, return 200 OK response to AS1 according to the AS1 sign.

After step 707～step 709:AS1 receives 200 OK response, return the Ack response that carries the AS2 sign to S-CSCF1; After S-CSCF1 receives the Ack response, return the Ack response that carries the AS2 sign to S-CSCF2 according to the AS2 sign.After S-CSCF2 receives the Ack response, return the Ack response to AS2 according to the AS2 sign.

Step 710: through above process, set up session between AS1 and the AS2, like this, and transfer medium stream information between AS1 and the AS2, for example, AS1 sends the medium stream information that carries the AS2 sign to S-CSCF1; After S-CSCF1 receives medium stream information, transmit the medium stream information that carries the AS2 sign to S-CSCF2; After S-CSCF2 receives medium stream information, send medium stream information to AS2 according to the AS2 sign.

In above process, can transmit qos parameter by S-CSCF1 and S-CSCF2 between AS1 and the AS2, qos policy is held consultation, decide through consultation qos parameter after, the transmission quality of the medium stream information that transmits between AS1 and the AS2 will be not less than the qos parameter of deciding through consultation.

In the conversation-based information interaction mode described above, carry out information interaction by the IMS functional entity between the AS, made full use of the routing function of IMS; And can hold consultation to the transmission quality between the AS, set up the corresponding session connection of satisfying the QoS quality according to the needs of information interaction; When not consulting qos policy, can realize the session connection of simple fixed service quality.

Be meant that based on the information interaction mode of non-session the information interaction between the AS do not undertaken by the session of setting up, but directly transmit by the IMS functional entity.Under the information interaction mode based on non-session, information mutual between the AS is mainly general information, as classes of messages information, if be medium stream information, then needs the manual configuration qos parameter.

For guaranteeing communication security, AS can and the IMS functional entity between carry out safety detection mechanism, as carrying out authentication between AS1 and the IMS functional entity mutually, carry out authentication between AS2 and the IMS functional entity mutually, if both sides all by the other side's authentication, then proceed follow-up information interaction.

Fig. 8 shows among the present invention and carries out information interaction embodiment one schematic diagram based on non-session between the AS, and as shown in Figure 8, the implementation procedure of carrying out information interaction based on non-session between the AS in the present embodiment may further comprise the steps:

Step 801～step 803:AS1 sends the information that carries the AS2 sign to I-CSCF.After I-CSCF receives information, send the HSS query requests that carries the AS2 sign to HSS according to the AS2 sign.After HSS receives the HSS query requests, search the address information of AS2 and the subscription data of being correlated with, return the HSS inquiry response to I-CSCF then according to the AS2 sign.

After step 804～step 806:I-CSCF receives the HSS inquiry response, send information to AS2 according to the AS2 address information.After AS2 receives information, return the response that carries AS1 to I-CSCF.After I-CSCF receives response, return response according to the AS1 sign to AS1, the information of its transmission of notice AS1 is received by AS2.

Fig. 9 shows among the present invention and carries out information interaction embodiment two schematic diagrames based on non-session between the AS, and as shown in Figure 9, the implementation procedure of carrying out information interaction based on non-session between the AS in the present embodiment may further comprise the steps:

Step 901～step 903:AS1 sends the information that carries the AS2 sign to I-CSCF.After I-CSCF receives information, send the DNS query requests that carries the AS2 sign to DNS according to the AS2 sign.After DNS receives the DNS query requests, search the address information of AS2 and the subscription data of being correlated with, return the DNS inquiry response to I-CSCF then according to the AS2 sign.

After step 904～step 906:I-CSCF receives the DNS inquiry response, send information to AS2 according to the AS2 address information.After AS2 receives information, return the response that carries AS1 to I-CSCF.After I-CSCF receives response, return response according to the AS1 sign to AS1, the information of its transmission of notice AS1 is received by AS2.

Figure 10 shows among the present invention and carries out information interaction embodiment three schematic diagrames based on non-session between the AS, and as shown in figure 10, the implementation procedure of carrying out information interaction based on non-session between the AS in the present embodiment may further comprise the steps:

Steps A 1～steps A 4:AS1 sends the information that carries the AS2 sign to S-CSCF1.After S-CSCF1 receives information, send the information that carries the AS2 sign to I-CSCF.After I-CSCF receives information, send the information that carries the AS2 sign to S-CSCF2.After S-CSCF2 receives information, send information to AS2 according to the AS2 sign.

I-CSCF can ask HSS or DNS inquiry corresponding to the S-CSCF2 of AS2, returns the address information of S-CSCF2 by HSS or DNS, thereby obtains the address information of S-CSCF2.

After steps A 5～steps A 8:AS2 receives information, return the response that carries the AS1 sign to S-CSCF2.After S-CSCF2 receives response, return the response that carries the AS1 sign to I-CSCF.After I-CSCF receives response, return the response that carries the AS1 sign to S-CSCF1 according to the AS1 sign.After S-CSCF1 receives response, return response according to the AS1 sign to AS1, the information of its transmission of notice AS1 is received by AS2.

The address information of carrying out the IMS functional entity that relates in the description of information interaction based on non-session between the above AS can be pre-configured among the corresponding AS, like this, when AS need carry out information interaction with other AS, just mutual information directly can be sent to the corresponding IMS functional entity of configuration, by corresponding IMS functional entity information be sent among other AS then.

In addition, the IMS functional entity can be used as the trigger point of corresponding service, when receiving a certain triggering message when the IMS functional entity, sends information according to the trigger condition of configuration to corresponding AS, and this AS is to the instruction of IMS functional entity return, as generating charge information etc.That is to say that when carrying out information interaction by the IMS functional entity between the AS, the IMS functional entity can be toggled to third party AS according to trigger condition, when receiving the message that carries the trigger condition sign, be toggled to third party AS as the IMS functional entity.Described trigger condition is configurable in the IMS functional entity; Also configurable in HSS, corresponding IMS functional entity can by with HSS obtain trigger condition alternately.

IMS can generate charge information to AS by the process that it carries out information interaction according to the configuration of operator.

In addition, set up session between the AS after, when carrying out information interaction, can be without the IMS functional entity, but directly carry out information interaction by the transmission network between the AS, as shown in figure 11:

Step B1～step B2:AS1 sends information by transmission network to AS2; After AS2 receives information, return response to AS1, notice AS1 has received the information of its transmission.

Step B3～step B4:AS2 sends information by transmission network to AS1; After AS1 receives information, return response to AS2, notice AS2 has received the information of its transmission.

There is not tangible execution sequence between step B1～step B2 and the step B3～step B4.

Before carrying out information interaction between AS1 and the AS2, can directly transmit qos parameter, qos policy is held consultation, decide through consultation qos parameter after, the transmission quality of the medium stream information that transmits between AS1 and the AS2 will be not less than the qos parameter of deciding through consultation.

Below only be described with the situation of carrying out information interaction between two AS, in fact, also can be and carry out information interaction between a plurality of AS, can carry out information interaction by the IMS functional entity between promptly a plurality of AS, specific implementation process and above description are basic identical, therefore repeat no more.

In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.

Claims

1, a kind of realization application server AS method for communicating is characterized in that this method comprises:

The request that A, an AS first service call session control function entity S-CSCF under self sends requirement and the 2nd AS sets up route;

B, a described S-CSCF provide described the 2nd AS sign to query call conversation control function entity I-CSCF;

C, described I-CSCF return the address information of the 2nd S-CSCF under described the 2nd AS that obtains by domain name server (DNS) or the signatory home subscriber register HSS of described the 2nd AS to a described S-CSCF;

2, method according to claim 1 is characterized in that, further comprise before the described steps A: an AS and a S-CSCF set up session, and the 2nd AS and the 2nd S-CSCF set up session.

3, method according to claim 2, it is characterized in that, a described AS and a S-CSCF set up session: an AS sends register requirement to I-CSCF, I-CSCF obtains a S-CSCF address information by the signatory HSS of an AS, transmit this register requirement to a described S-CSCF then, a S-CSCF responds this register requirement and an AS sets up session;

Described the 2nd AS and the 2nd S-CSCF set up session: the 2nd AS sends register requirement to I-CSCF, I-CSCF obtains the 2nd S-CSCF address information by the signatory HSS of the 2nd AS, transmit this register requirement to described the 2nd S-CSCF then, the 2nd S-CSCF responds this register requirement and the 2nd AS sets up session.

4, method according to claim 3, it is characterized in that, described I-CSCF obtains a S-CSCF address information by the signatory HSS of an AS: I-CSCF obtains the signatory HSS address information of an AS by scope of business function SLF, and I-CSCF obtains a S-CSCF address information by described HSS then;

5, method according to claim 3, it is characterized in that, a described S-CSCF responds this register requirement and an AS and sets up session and be: a S-CSCF obtains the subscription data of an AS by the signatory HSS of an AS, return the registration response to an AS then, set up session with an AS;

6, method according to claim 1 is characterized in that, further comprises before the described steps A: the address information of configuration the one S-CSCF in an AS, the address information of configuration the 2nd S-CSCF in the 2nd AS.

7, method according to claim 1 and 2, it is characterized in that, described step D comprises: an AS sends the session that carries the 2nd AS sign to a S-CSCF and sets up request, the one S-CSCF transmits the session that carries the 2nd AS sign to the 2nd S-CSCF and sets up request, after the 2nd S-CSCF receives that request is set up in session, send session according to the 2nd AS sign to the 2nd AS and set up request, after the 2nd AS receives that request is set up in session, return session by a S-CSCF and the 2nd S-CSCF to an AS and set up response, the session between a foundation and the AS.

8, method according to claim 2, it is characterized in that a described AS and a S-CSCF set up session, further comprise before: carry out safety detection mechanism between an AS and the S-CSCF, if by safety detection mechanism, then an AS and a S-CSCF set up session; Otherwise, finish current flow process;

9, method according to claim 1 is characterized in that, described step D further comprises: an AS determines QoS parameter by a S-CSCF and the 2nd S-CSCF and the 2nd AS consulting service quality strategy.

10, method according to claim 1 is characterized in that, further comprise after the described step D: the 2nd AS returns response by the 2nd S-CSCF and a S-CSCF to an AS.

11, method according to claim 1 is characterized in that, described the 2nd AS is an above AS.

12, method according to claim 1 is characterized in that, this method further comprises: a S-CSCF is toggled to third party AS according to the related service trigger condition.

13, method according to claim 12 is characterized in that, described trigger condition is configured among the S-CSCF; Or be configured among the signatory HSS of an AS, a S-CSCF by with described HSS obtain described trigger condition alternately.