CN102413099A

CN102413099A - Method and system for processing voice over internet protocol (VoIP) call when called information is failed to acquire

Info

Publication number: CN102413099A
Application number: CN2010102901979A
Authority: CN
Inventors: 骆文; 涂杨巍
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2010-09-20
Filing date: 2010-09-20
Publication date: 2012-04-11
Anticipated expiration: 2030-09-20
Also published as: CN102413099B

Abstract

The invention discloses a method for processing a voice over internet protocol (VoIP) call when called information is failed to acquire, which comprises the following steps that: when an authentication, authorization and accounting (AAA) server is failed to acquire a message of a first mobile microwave access worldwide interoperability VoIP service (WVS) server or when a first WVS server is failed to find, an indication message and/or contract information of a called terminal is transmitted to a second WVS server. The invention also discloses a system for processing a VoIP call when the called information is failed to acquire. A transmission unit of the system is used for transmitting the indication message and/or the contract information of the called terminal to the second WVS server when the AAA server is failed to acquire the message of the first WVS server or when the first WVS server is failed to find. Due to the adoption of the method and the system, the problems in the prior art when the called information is failed to acquire can be avoided.

Description

Handle the method and system of voip call when obtaining the called party information failure

Technical field

The present invention relates to the communications field; Relate in particular to a kind of mobile microwave access global-intercommunication (WiMAX that is used for; Worldwide Interoperability for Microwave Access) obtaining of system handled the method and system that the networking telephone (VoIP, Voice over IP) is called out when called party information is failed.

Background technology

VoIP is the technology of a kind of internet usage agreement (IP) in the enterprising lang sound transmission of network, is the focus of the concern of present vast operator.

Fig. 1 is existing a kind of professional schematic network structure of VoIP of supporting to carry out; Shown in 1 figure; The terminal is connected to IAD through the base station, resident data channel function on the IAD (DPF, Data PathFunction), authentication device entities such as (Authenticator).The effect of IAD is to come the exchanges data between the support terminal and the external world as the aggregation node of communicating by letter between terminal and the external world; And assist authentication and authorization charging (AAA, Authentication, Authorization and Accounting) server to realize the authentication at terminal etc.Aaa server is the critical facility in the communication network, is used to realize control and the management of Virtual network operator to data, user, and authentication, mandate and account service are provided.

Mobile microwave access global-intercommunication network telephone service (WVS; WiMAX VoIP Service) server is that the WiMAX network is used to carry out the professional node of VoIP; Comprise the session initiation protocol (SIP that is responsible for maintenance terminal; Session Initial Protocol) registration, uses Session Initiation Protocol between calling terminal and terminal called, to set up voip conversation and in conversation procedure, be responsible for Media Stream (like, VoP) transmission, media format conversion etc.Interface is all arranged between WVS server and IAD and the aaa server.And the major function of the interface between aaa server is to obtain terminal user account information from aaa server to support the user to be used the professional mandate of VoIP; With the major function of IAD interface, be to support mutual between WVS server and the DPF, through DPF and terminal switch and relevant signaling and the Media Stream of VoIP business.

Dotted line the right and left shown in Figure 1 is represented Calling Side and callee side respectively.Calling Side, callee side all also contain the network equipments such as base station, IAD, WVS server and aaa server except comprising calling terminal, terminal called, be respectively calling terminal, terminal called service.Calling terminal, terminal called are registered to respectively in the WVS service separately, through IP network, link to each other like the Internet net between these two WVS servers, and signaling and Media Stream all exchange through this IP network between calling terminal and the terminal called.When calling terminal and terminal called belong to different operators; Called operator generally provides an inlet WVS server (Entry Point) to caller operator; The all-calls request of setting up all at first is sent on this inlet WVS server, and then is further handled by inlet WVS server.The benefit of doing like this is to make called affiliated operator's protection oneself dispose the topological structure of WVS server effectively.Except above-mentioned inlet WVS server, also have two WVS servers to be respectively calling terminal and terminal called service among Fig. 1.Calling terminal and terminal called also would subscribe to (at this moment, the WVS server need not enter the mouth) on the same WVS server, and two VoIP servers on dotted line both sides are same physical entities among Fig. 1 at this moment.

After endpoint registration is to the WVS server, promptly carry out after the SIP registration VoIP service that the terminal just can use the WVS server to provide.Calling terminal must and terminal called between after call setup (Call Setup) success carried out, just can converse.When carrying out call setup between the calling and called, calling terminal at first will invite SIP (SIP INVITE) message to send to terminal called.Shown in Figure 2 for realization calling terminal in the prior art sends to terminal called with the SIP INVITE, and then accomplish the method for call setup, specifically comprise following steps:

Step 201: the SIP that calling terminal sends it to terminal called invites (SIP INVITE) message at first to send to the WVS server of calling terminal.Below abbreviate the WVS server of calling terminal as caller WVS server.

Step 202: caller WVS server returns SIP to calling terminal and is attempting message.SIP is attempting message and is representing with SIP 100 (Trying).

Step 203～204: caller WVS server sends the access request message to the aaa server of calling terminal, and whether the inquiry terminal called is allowed to call out.If suppose passablely, then this aaa server returns sure replying to caller WVS server, promptly returns to caller WVS server and accepts message.

Step 205: caller WVS server finds the inlet WVS server of terminal called operator, and above-mentioned SIP INVITE is sent to this inlet WVS server.

Step 206: inlet WVS server returns SIP to caller WVS server and is attempting message.SIP is attempting message and is representing with SIP 100 (Trying).

Step 207～208: inlet WVS server checks at first whether terminal called is registered in this locality, and hypothesis is not that the WVS server that then enters the mouth sends called position enquiring request message to the aaa server of terminal called here.The aaa server of terminal called is according to the relevant information of terminal called SIP registration; Find the WVS server (being called for short called WVS server) of terminal called registration, and address information that will this called server returns to the WVS server that enters the mouth through called position enquiring response message.

Step 209: according to the address information that AAA returns, inlet WVS server finds called WVS server, and above-mentioned SIP INVITE is sent to called WVS server.

Step 210: called WVS server returns SIP to inlet WVS server and is attempting message.SIP is attempting message and is representing with SIP 100 (Trying).

Step 211: called WVS server sends to terminal called with above-mentioned SIP INVITE.

Step 212: terminal called returns SIP to called WVS server and is attempting message.SIP is attempting message and is representing with SIP 100 (Trying).So far, terminal called is finally received the SIP INVITE from calling terminal.

Step 213: continue to carry out follow-up call setup flow process between calling terminal and the terminal called.

Visible through foregoing description; After in the SIP INVITE sends to called provider domain; When terminal called is not when being registered on the inlet WVS server; This inlet WVS server need know earlier whom the WVS server of terminal called registration is, and then the SIP INVITE is sent in the past, lets called WVS server carry out subsequent treatment.In order to know whom above-mentioned WVS server is; Inlet WVS server need send message to aaa server; To obtain the relevant information of called WVS server from aaa server; This information or these information, the address information of this called WVS server of description of the Prior Art (like the IP address) for example, the WVS server that can help to enter the mouth is known (finding) called WVS server.If aaa server obtains this information or these information (like above-mentioned IP address) failure, adopt prior art will have following two aspect problems:

First aspect; Prior art does not consider to enter the mouth the WVS server when aaa server sends request; Aaa server can not find those WVS servers that can help to enter the mouth and knows that called WVS server is the situation of whose information; For example, aaa server obtains address information (step 207～208) failure of the called WVS server of description of the Prior Art.Cause the reason of this situation to have a lot, for example, terminal called not start signs in to (terminal is current not online, or it is current not in use to be called the terminal) in the WiMAX network; And for example, though starting up of terminal signs in in the WiMAX network, do not carry out SIP registration (terminal is current unregistered); For another example, in addition the terminal called called out of calling terminal do not have (terminal does not exist).Under above-mentioned these situation; Terminal called did not carry out the SIP registration to any one WVS server; Therefore aaa server just obtains less than registering relevant information with this terminal SIP; That is to say that the WVS server that can not find the called can't provide effective information to inlet WVS server and can know by it whom called WVS server is.Therefore; In this case; The flow process of prior art will be when implementing called position enquiring (shown in above-mentioned step 207), and meet with unusual: the aaa server of terminal called does not get access to the address information of called WVS server, returns the address information of an effective called WVS server can't for inlet WVS server; Therefore the WVS server that enters the mouth can't know whom called WVS server is, and can't call flow be carried out down.Like this, from the angle of network, it is unexpected unusual to cause the call setup flow process to meet with, and makes network element relevant in the network not know how to handle, cause the wasting of resources; From user's angle, particularly for the calling subscriber, can meet with bad business experience, as be unable to get through on the telephone, also can not get any prompting.

Second aspect; In the prior art; Called WVS server is when the SIP INVTE message of receiving from the calling party (shown in above-mentioned step 209); Also can send SOT state of termination query requests, obtain the state of current terminal called, and carry out corresponding operation according to the state of terminal called from aaa server to the aaa server of terminal called.Comprising, when being in " not online " state when terminal called is current (this moment network can't communicate by letter with terminal called), then called WVS server can be checked the terminal called call transfer service of whether having contracted.If signatory, then be called execution calling transfer.Specifically, according to CAMEL-Subscription-Information, called WVS server sends to (as shown in Figure 1, as can to claim that also this terminal is the terminal of transferring to) on another terminal called with the SIP INVITE, sends one to calling terminal simultaneously and calls out the current prompting that is transferred.Follow-up by the above-mentioned terminal of transferring to replace former terminal called accomplish and calling terminal between call setup and conversation.The origin cause of formation of considering to prior art that causes above-mentioned terminal called " not online " is described as for example: for example, the wireless signal of current terminal called region is bad, can not support to communicate by letter between terminal called and the network; And for example, network is current busy, can't handle and terminal called between signaling; For another example, terminal called the service area of operator etc. because move.

Said calling transfer is to use a kind of very widely supplementary service in the prior art.The calling transfer basic principle is on the basis that the called subscriber contracts; When terminal called is current can't participate in session that calling terminal initiates the time; Network is transferred to the calling that caller is initiated on another terminal automatically; Replace terminal called to accomplish session by this terminal, the calling transfer when terminal called is not online is a kind of of above-mentioned call transfer service.In the prior art; Because terminal called was carried out SIP registration (this WVS server becomes called WVS server) to certain WVS server; And this WVS server has obtained this user's CAMEL-Subscription-Information (CAMEL-Subscription-Information is kept in the aaa server) from the aaa server of terminal called in the SIP register flow path, wherein comprises the relevant information (as when terminal called is not online, transferring the call on which terminal) of calling transfer; So follow-up this WVS server; Just called WVS server can be embodied as the terminal called user and carry out call transfer service according to user signing contract information.That is to say; In the prior art,, the terminal called user need satisfy two conditions for carrying out call transfer service: the first, and terminal called was carried out the SIP registration to certain WVS server; After succeeding in registration, this WVS server becomes the called WVS server of this terminal called; The second, this WVS server obtains this user's CAMEL-Subscription-Information from the aaa server of terminal called in the SIP register flow path.Two conditions are indispensable.

When the called subscriber has contracted call transfer service (like unconditional call forwarding; Not online calling transfer) time; The WVS server even aaa server can not find the called (reason of describing like the preceding text first aspect), network also should be the terminal called user carry out call transfer service (above-mentioned terminal current unregistered be appreciated that into the terminal current not online).Yet; Because terminal called was not carried out the SIP registration to any one WVS server; Do not satisfy first condition of above-mentioned realization call transfer service, therefore have no a WVS server to have (comprising inlet WVS server) CAMEL-Subscription-Information of this terminal called as called WVS server.Therefore, the flow process according to prior art provides will cause having no a WVS server to carry out the call transfer service that the user contracts for this terminal use.In fact, be not only call transfer service and can't carry out, the offline business that all terminal called users contract also all can't be carried out.Here, offline business refers to: even the user is unregistered, when not online, also need be the business that the user carries out.Will cause the greatly discontented of user like this, having contracted does not still obtain service, can cause business normally not carry out yet.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method and system of handling voip call when called party information is failed of obtaining, the problems referred to above that can in the time obtaining the called party information failure, avoid prior art to exist.

For achieving the above object, technical scheme of the present invention is achieved in that

A kind of method of handling voip call when called party information is failed of obtaining; This method comprises: when authentication and authorization charging (AAA) server obtain first mobile microwave access global-intercommunication network telephone service (WVS) server information failure, or when can not find a said WVS server, send the CAMEL-Subscription-Information of indication information and/or said terminal called to the 2nd WVS server.

Wherein, the information of a said WVS server is: can support the information that the 2nd WVS server finds a WVS server.

Wherein, the information of a said WVS server comprises following any one or at least a combination:

The sign of a said WVS server;

The IP address of a said WVS server;

The domain name of a said WVS server;

The generic route encapsulation sign of a said WVS server.

Wherein, said indication information specifically comprises mistake indication or execution result indication;

The information that said wrong indication or execution result indication are used to notify the said aaa server of said the 2nd WVS server to obtain a said WVS server is failed.

Wherein, according to said wrong indication or execution result indication, the corresponding operation that said the 2nd WVS server is carried out specifically comprises: end call is set up and is attempted.

Wherein, the CAMEL-Subscription-Information of said terminal called specifically comprises the offline business information that terminal called is signatory.

Wherein, according to the signatory offline business information of said terminal called, the corresponding operation that said the 2nd WVS server is carried out specifically comprises: for said terminal called is carried out offline business.

Wherein, the signatory offline business information of said terminal called specifically comprises and carries out the relevant information of call transfer service;

According to said with carry out the relevant information of call transfer service, the corresponding operation that said the 2nd WVS server is carried out specifically comprises: be terminal called execution call transfer service.

Wherein, a said WVS server is: the WVS server that terminal called is registered; Said the 2nd WVS server is: send message to aaa server, ask the WVS server of the information of a said WVS server;

Said the 2nd WVS server specifically comprises: the inlet WVS server of said terminal called operator; Or the WVS server registered of said calling terminal.

A kind of system that handles voip call when called party information is failed that obtains; This system comprises: transmitting element; Be used for when aaa server obtain a WVS server information failure, or when can not find a said WVS server, send the CAMEL-Subscription-Information of indication information and/or said terminal called to the 2nd WVS server.

The sign of a said WVS server;

The IP address of a said WVS server;

The domain name of a said WVS server;

The generic route encapsulation sign of a said WVS server.

Wherein, said indication information specifically comprises mistake indication or execution result indication; The information that said wrong indication or execution result indication are used to notify the said aaa server of said the 2nd WVS server to obtain a said WVS is failed.

Wherein, this system also comprises: performance element is used for said the 2nd WVS server according to said wrong indication or execution result indication, executive termination call setup attempt.

Wherein, this system also comprises: performance element is used for said the 2nd WVS server according to the signatory offline business information of said terminal called, for terminal called is carried out offline business.

The present invention when aaa server obtain a WVS server (the WVS server of registering like terminal called) the information failure, or when can not find a WVS server, send the CAMEL-Subscription-Information of indication information and/or terminal called to the 2nd WVS server (as asking the WVS server of this information).

Adopt the present invention; Consider that aaa server obtains the situation of the information failure of the WVS server that terminal called registers; And corresponding solution is provided, thereby avoided prior art to reckon without the problems referred to above that situation caused that aaa server obtains the information failure of called WVS server.

Description of drawings

Fig. 1 carries out the professional schematic network structure of VoIP for the prior art support;

Fig. 2 sends to terminal called for the existing techniques in realizing calling terminal with the SIP INVITE, to accomplish the sketch map of call setup;

Fig. 3 is the method flow sketch map of the embodiment of the invention one;

Fig. 4 is the method flow sketch map of the embodiment of the invention two;

Fig. 5 is the method flow sketch map of the embodiment of the invention three.

Embodiment

Basic thought of the present invention is: when aaa server obtain a WVS server (the WVS server of registering like terminal called) the information failure, or when can not find a WVS server, send the CAMEL-Subscription-Information of indication information and/or terminal called to the 2nd WVS server (as asking the WVS server of this information).

The information of the WVS server that above-mentioned terminal called is registered is meant that the WVS server that can help this information of request finds the information of the WVS server that terminal called registers.Such information mainly is meant its IP (IPv4, IPv6) address except the address information of called WVS server described in the prior, in addition, also comprises other some general information.For example; Domain name (the FQDN of called WVS server; Fully Qualified Domain Name), the generic route encapsulation of the sign (Identity) of called WVS server, called WVS server sign (GRE KEY, Generic Routing Encapsulation Key).Ask the WVS server of these information can easily know whom the WVS server that terminal called is registered is, can also find this WVS server according to these information one of which or combination.

Below in conjunction with accompanying drawing when need find called WVS server at inlet WVS server according to the address information of above-mentioned description of the Prior Art; The situation that AAA but obtains the address information failure of called WVS server is an example, and the enforcement of technical scheme is done further to describe in detail.

A kind of method of handling voip call when called party information is failed of obtaining mainly comprises following content:

When aaa server obtains the address information failure of the WVS server that terminal called registers, send the CAMEL-Subscription-Information of indication information and/or said terminal called to the WVS server of this address information of request.

Here; Prior art does not consider to obtain the situation of address information (hereinafter referred " called address the information ") failure of the WVS server that terminal called registers; Thereby above-mentioned a series of problems of the prior art occur, the present invention has considered to obtain the situation of called address information failure for fear of above-mentioned a series of problems of the prior art occurring; And corresponding solution is provided; That is: the problem of setting forth to the prior art first aspect, when the present invention obtains the failure of called address information, the WVS server through this address information of indication information indication request (as; The inlet WVS server of terminal called operator) knows the current situation of obtaining the failure of called address information that is in; So that this WVS server is carried out operation targetedly, thereby it is unexpected unusual to have avoided in the prior art this WVS server to meet with, and can't carry out the problem of flow targetedly.Problem to the elaboration of prior art second aspect; When the present invention obtains the failure of called address information; Because terminal called was not carried out SIP registration (being that called WVS server does not exist) to any one WVS server, at this moment, had no a WVS server to have this terminal called user's CAMEL-Subscription-Information; Therefore; Aaa server of the present invention initiatively uses the WVS server that the CAMEL-Subscription-Information of terminal called offers this called address information of request (like, above-mentioned inlet WVS server), thereby according to this CAMEL-Subscription-Information; This WVS server can be carried out call transfer service for the terminal called user, has avoided prior art can't realize the problem of calling transfer.

Further, the address information of the WVS server registered of terminal called specifically comprises: the IP address of this WVS server; And/or the domain name of this WVS server.

Further, aaa server comprises the execution result indication of mistake indication or position enquiring to the indication information of the WVS server transmission of request called address information; These two kinds of indications know that in order to indicate this WVS server aaa server obtains the failure of called address information.

Further, the WVS server of this request called address information knows when aaa server obtains the failure of called address information that the corresponding operation of execution comprises end call foundation trial.

Further, during the executive termination call setup attempt, also comprise to calling terminal and send corresponding message, set up the reason of attempting with the indication call release.Said message specifically comprises: any one among SIP BYE message, SIPCANCEL message, SIP 404 (Not Found) message, the SIP 480 (Temporarily Unavailable).

Further, aaa server comprises the offline business information that terminal called is signatory to the CAMEL-Subscription-Information of the terminal called of the WVS server transmission of request called address information; The signatory offline business information of terminal called is that offline business is carried out at the terminal in order to indicate this WVS server.

Further, the WVS server of request called address information is according to the indication of the signatory offline business information of terminal called, and the corresponding operation of execution comprises: carry out offline business.

Further, aaa server comprises and the relevant information of execution call transfer service to the signatory offline business information of terminal called of the WVS server transmission of request called address information; The corresponding operation that this moment, this WVS server was carried out comprises calling transfer.

Further, with the WVS server that the terminal was registered to of carrying out sign that the relevant information of call transfer service comprises the terminal that is not limited to transfer to, transferring at least a information.

Further, the WVS server of above-mentioned request called address information comprises: the WVS server that the inlet WVS server of terminal called operator or calling terminal are registered.

In sum; Scheme of the present invention; In the time of can being the address information of the WVS server registered to the aaa server at this terminal inquiry terminal called at the inlet WVS of terminal called operator server; Obtain at aaa server under the situation of this called address information failure, aaa server returns wrong indication or execution result indication to inlet WVS server, to trigger the trial that this inlet WVS server stops this SIP call setup.Perhaps; When obtaining less than above-mentioned called address information; The aaa server offline business information that terminal called is signatory sends to inlet WVS server, and triggering inlet WVS server is that terminal called is carried out offline business, solves a series of problems that exist in the prior art.

Below to the present invention's elaboration of giving an example.

Embodiment one: when realizing that in the WiMAX network terminal called is in abnormality, to the handling process of voip call foundation.Flow process as shown in Figure 3 may further comprise the steps:

Step 301: receive from the calling party (from calling terminal at the inlet WVS of terminal called operator server; Or caller WVS server) after the SIP INVITE; Inlet WVS server finds the aaa server of terminal called according to domain-name information, and sends called position enquiring request to this aaa server, returns WVS server that terminal called registers (promptly in order to the request aaa server; Called WVS server) address information (that is called address information).The called position enquiring request here can be called as location information request (Location Information Request) again, and when hereinafter did not add explanation, both can be equal to replacement.

Concrete, the sign that terminal called is carried in above-mentioned called position enquiring request, and inlet WVS server requests AAA returns the indication of the information (like address informations such as IP address, domain names) of the called WVS server of terminal called.

Preferably, inlet WVS server can also carry an indication in this message, and the indication aaa server returns terminal called present located state.For example, a Bit position in the inquiry request message of use location is changed to 1 with it, when asking called address information to be illustrated in, also asks the state information of this terminal called.

Step 302: the aaa server inquiry called address information of terminal called.In the present embodiment, suppose that aaa server obtains less than terminal called and the relevant information of SIP registration.

Concrete, aaa server obtains less than terminal called and has the multiple origin cause of formation with the relevant information of SIP registration.For example, terminal called not start signs in in the WiMAX network, and this moment, aaa server can be thought terminal called not online (Not Connected) or terminal called not in use (Not In Service); And for example, suffered though starting up of terminal signs in to network, do not carried out SIP registration, this moment, aaa server can be thought terminal called unregistered (Not Registered), and it is not online certainly to see the terminal as; For another example, even the terminal (user) of this terminal called sign representative do not exist, and aaa server can think that there be not (Not Existence) in terminal called at this moment.In a word, can't get access to aaa server at this moment the relevant information of the WVS server that this terminal called registers, can not find this called WVS server, called in other words WVS server does not exist.It is pointed out that the present invention is different with prior art, prior art always thinks that called WVS server exists.

Step 303: the aaa server of terminal called returns called position enquiring response message to inlet WVS server.This called position enquiring is replied, and can be called as location information answer (Location InformationAnswer, or Location Information Response) again, and when hereinafter did not add explanation, both can be equal to replacement.

Concrete, carry in the called position enquiring response message and use the error reason value, perhaps the state information at the terminal of execution result indicated value sign with or carry out the relevant information of offline business.

Preferably; Owing to obtain less than called address information; Specifically be meant the address information obtained less than the WVS server (called WVS server) of terminal called registration (or, be referred to as positional information), so the IP address of WVS server, the domain name of this WVS server etc.; Aaa server carries a wrong indication or execution result indication in above-mentioned called position enquiring response message, and this indication is sent on the inlet WVS server.

Preferably, aaa server can also be carried at the concrete state of the terminal called of judging (do not exist, unregistered, not online etc.) and return to inlet WVS server in the called position enquiring response message.Such as carry called not online/abnormality indication such as unregistered or the like.

Preferably, aaa server can use an error reason value (Cause Value) or execution result indicated value (Result) to express above-mentioned state, obtains the reason less than called address information in order to the indication aaa server.For example, Cause Value (or Result)=1 expression terminal is unregistered in addition, and the WVS server that then enters the mouth will be known because terminal called is unregistered, so cause aaa server to obtain less than called address information.Same; In addition not online, Cause Value (or Result)=3 expression terminal, Cause Value (or Result)=2 expression terminal is not in use, Cause Value (or Result)=4 terminal do not exist or the like, and this depends on the configuration of operator.

Preferably; Aaa server can also be searched this terminal called user's CAMEL-Subscription-Information (SubscriptionData); The offline business if this user has contracted; Then aaa server can also be carried at the information relevant with these offline business in the above-mentioned position enquiring response message, sends to inlet WVS server.

Preferably, aaa server can also carry an indication in above-mentioned position enquiring response message, is that which kind of offline business terminal called carries out with indication inlet WVS server; Perhaps the relevant information of the offline business that only will carry out of aaa server is carried in the position enquiring response message, sends to inlet WVS server.

Preferably; When above-mentioned offline business comprised the call transfer service that the terminal called user contracts (as; Unconditional call forwarding, not online calling transfer) time; Aaa server will with carry out the relevant information of this call transfer service; Preferably comprise the address information (like the IP address of this WVS server) of the WVS server that register at the sign at address information (like the IP address at terminal), the terminal at the terminal of transferring to, the terminal transferred to etc., send to inlet WVS server through the position enquiring response message.Preferably, this message can also be carried an indication, uses these relevant informations to carry out call transfer service as terminal called with indication inlet WVS server.

Certainly; Here need explain; If as above-mentioned aaa server finds that terminal called does not exist; Then can only return a wrong indication or execution result indication, and preferably return an error reason value or execution result indicated value, in order to express the for example information of " user does not exist " to inlet WVS server.

In the present embodiment; Between the aaa server of inlet WVS server and terminal called alternately can be based on aaa protocol; For example use remote customer dialing authentication service (RADIUS, RemoteAuthentication Dial In User Service) agreement, perhaps use Diameter.When using RADIUS, corresponding request (Access-Request) message that inserts of above-mentioned terminal called location request message, response message corresponding access the in terminal called position accepted (Access-Accept) message, perhaps admission reject (Access-Reject) message.

The method flow that uses present embodiment to provide; When aaa server obtains less than called address information; Aaa server can return corresponding indication information to the called server of inlet, with the subsequent treatment of the called server of support inlet, and can not cause the call flow aborted.

Embodiment two: when the aaa server of terminal called obtains less than called address information, and when inlet WVS server returned wrong indication, inlet WVS server triggers discharged the handling process of this call setup.Flow process as shown in Figure 4 comprises following steps:

Step 401: the SIP INVITE that calling terminal sends it to terminal called at first sends to the WVS server of calling terminal.

Step 402: caller WVS server returns SIP to calling terminal and is attempting message.SIP is attempting message and is representing with SIP 100 (Trying).

Step 403-step 404: the aaa server of caller WVS server lookup calling terminal, whether the inquiry terminal called is allowed to call out.If present embodiment hypothesis can, then aaa server returns sure replying to caller WVS server.

Step 405: caller WVS server finds the inlet WVS server of terminal called operator, and above-mentioned SIP INVITE is sent to this inlet WVS server.

Step 406: inlet WVS server returns SIP to caller VoIP server and is attempting message.SIP is attempting message and is representing with SIP 100 (Trying).

Step 407: inlet WVS server sends called position enquiring request message according to the described method of step 301 to the aaa server of terminal called.

Step 408: the aaa server of terminal called is inquired about called address information according to the method for describing in the step 302, and supposes that aaa server obtains less than this address information, can not find this called WVS server in other words.

Step 409: the aaa server of terminal called returns called position enquiring response message to inlet WVS server.

Concrete; According to the method for describing in the step 303; Here suppose that aaa server sends wrong indication information or execution result indication information to inlet WVS server; Obtain the failure of called address information in order to indication inlet WVS server, preferred AAA can also send to the state at terminal inlet WVS server, for example uses the form of error reason value or execution result indicated value to express the state at terminal (not online, unregistered, do not exist, currently in use do not wait).

Step 410: receive after above-mentioned wrong indication information or the execution result indication information that the inlet WVS server of terminal called initiates to stop the flow process of this setup requests.

Concrete, inlet WVS server sends one to caller WVS server and triggers the message that stops (release) call setup attempt (Call Setup Attempt) this time, further this message is sent to calling terminal by caller WVS server; The WVS server that perhaps enters the mouth directly sends to calling terminal with this message.

Preferably, inlet WVS sends sip message to calling party's (caller WVS server, calling terminal), like executive terminations (release) such as SIP BYE, SIP Cancel call setup attempt this time.

Preferably, the error reason value or the execution result indicated value at the terminal of returning according to aaa server, inlet WVS server returns different informations to the calling party.For example, when the user does not exist, SIP 404 (Not Found) can be returned, when unregistered or not online, SIP 480 (Temporarily Unavailable) etc. can be returned as the user.

Method through the present embodiment description; Obtain the address information of the WVS server of registering less than terminal called at aaa server; When can not find this called WVS server in other words; Inlet WVS server can obtain suitable indication (mistake indication information or execution result indication information) from aaa server, thereby makes inlet WVS server can the normal execution of flow process be gone down, and it is unexpected unusual to avoid network to meet with; Also can give the calling subscriber with relevant prompting simultaneously, promote user's business experience.

Embodiment three: when the aaa server of terminal called obtains less than called address information; The relevant informations such as offline business that this terminal called is signatory send to inlet WVS server; Trigger inlet WVS server and carry out the handling process of offline business for this terminal called; Preferably, can carry out Call Forwarding services.Flow process as shown in Figure 5 comprises following steps:

Step 501～step 506: with step 401～step 406.

Step 507～step 508: with step 407～step 408.

Step 509: the aaa server of terminal called returns called position enquiring response message to inlet WVS server.

Concrete; According to the method for describing in the step 303, aaa server is searched terminal called user's CAMEL-Subscription-Information, when the user has contracted offline business; Aaa server obtains and carries out the relevant information of this (a bit) offline business, and sends to inlet WVS server through the position enquiring response message.

Preferably, these offline business comprise: call transfer service (not online calling transfer, unconditional call forwarding), missed call short message prompt, voice mail etc. do not need that the terminal is online just to be the supplementary service that carry out at the terminal.

Preferably; When this offline business was call transfer service, AAA need be with the sign at the terminal of transferring to, and preferred; The address information of the WVS server that register at this terminal of transferring to (like, the IP address of this WVS server) sends to inlet WVS server.

Here aaa server will be carried out the relevant information of call transfer service and send to inlet WVS server, and according to the method described in the step 303, indication inlet WVS server is carried out calling transfer.

Step 510: inlet WVS server sends Indication message to caller WVS server, and indicating call is transferred.

Inlet WVS server can send SIP 181 (Call Forwarding) message to caller WVS server, notifies caller WVS server to call out and is transferred.

Step 511: caller WVS server further is transferred indication with above-mentioned calling and sends to calling terminal.

Caller WVS server can send to calling terminal with above-mentioned SIP 181 (Call Forwarding) message, is transferred with notice calling terminal customer call.

Step 512: inlet WVS server according to get access to from aaa server with carry out the relevant information of calling transfer; Find the WVS server of this endpoint registration of transferring to (to be called for short; The WVS server of transferring to), and with the SIP INVITE send to this WVS server.

It should be noted that the WVS server that might enter the mouth self is exactly the WVS server of the endpoint registration transferred to.

Step 513: the WVS server of transferring to returns SIP to inlet WVS server and is attempting message.SIP is attempting message and is representing with SIP 100 (Trying).

Step 514: the WVS server of transferring to sends to the SIP INVITE at the terminal of transferring to.

Step 515: the terminal of transferring to is returned SIP to the WVS server of transferring to and is being attempted message.SIP is attempting message and is representing with SIP 100 (Trying).

Step 516: the terminal of transferring to is after receiving the SIP INVITE, with replacing continuing between former terminal called and the calling terminal to carry out the remaining flow process of call setup.

Method through the present embodiment description; Obtain the address information of the WVS server of registering less than terminal called at aaa server; When can not find this called WVS server in other words, the offline business relevant information of terminal called is sent to inlet WVS server, and trigger inlet WVS server and carry out offline business for the terminal called user; Special, for it carries out call transfer service.Solved in the prior art when aaa server obtains less than called address information, can't carry out the problem of offline business (call transfer service) for terminal called.Certainly; In the present embodiment; If called signatory any offline business when existing (perhaps called) at all; Then can return wrong indication information or execution result indication information by AAA to inlet WVS server, trigger the trial that the end call of inlet WVS server is set up as second embodiment.

Here, need to prove, the content description that the present invention is above be that the address information failure of obtaining the called WVS server of description of the Prior Art with aaa server is the solution of example.In fact; When inlet WVS server according to other information know called WVS server be who (for example; According to the sign of the domain name of called WVS server, called WVS server, the generic route encapsulation sign of called WVS server etc.), and aaa server is can't obtain this (these) information the time, in other words; When aaa server can not find the called the WVS server, the scheme of foregoing description was practical equally.Its principle is identical, repeats no more.

At last, what be worth explanation is, if calling terminal and terminal called belong to an operator together; When aaa server (at this moment; Promptly being the AAA of calling terminal, also is the AAA of terminal called) when can not find out the information of the WVS server that terminal called registers, aaa server can return miscue information or execution result indication information to caller WVS server; And, can also return called signatory offline business information to this caller WVS server; Making caller WVS server stop the trial of this call setup, perhaps is called execution offline business (like, calling transfer).At this moment, the function of this caller WVS server is consistent with above-mentioned inlet WVS server with behavior, and principle is identical, repeats no more.

A kind of system that handles voip call when called party information is failed that obtains; This system comprises transmitting element; Transmitting element is used for obtaining the information failure of a WVS server (the WVS server of registering like terminal called), or when can not find a WVS server, sending the CAMEL-Subscription-Information of indication information and/or terminal called to the 2nd WVS server (as asking the WVS server of the WVS server info that above-mentioned terminal called registers) when aaa server.

Here, the information of a WVS server is: can support the information that the 2nd WVS server finds a WVS server.The information of the one WVS server comprises following any one or at least a combination:

The sign of the one WVS server;

The IP address of the one WVS server;

The domain name of the one WVS server;

The generic route encapsulation sign of the one WVS server.

Here, indication information specifically comprises mistake indication or execution result indication; Mistake indication or execution result indication are used to notify the 2nd WVS server (as asking the WVS server of the WVS server info that above-mentioned terminal called registers) aaa server to obtain the information failure of a WVS server (the WVS server of registering like terminal called).

Here, this system also comprises performance element.Performance element is used for the 2nd WVS server (as asking the WVS server of the WVS server info that above-mentioned terminal called registers) according to mistake indication or execution result indication, executive termination call setup attempt.

Here; The CAMEL-Subscription-Information of terminal called specifically comprises the offline business information that terminal called is signatory, and indicating the 2nd WVS server (as asking the WVS server of the WVS server info that above-mentioned terminal called registers) WVS server is that terminal called is carried out offline business.

Here, this system also comprises performance element.Performance element is used for the 2nd WVS server (as asking the WVS server of the WVS server info that above-mentioned terminal called registers) according to the signatory offline business information of terminal called, is that terminal called is carried out offline business.

Here; The information of the WVS server that terminal called is registered comprise can let the WVS server that obtains this information (as, the inlet WVS server of terminal called operator, the WVS server that calling terminal is registered etc.) find those information of the WVS server that terminal called registers.

The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.

Claims

1. one kind is obtained the method for handling voip call when called party information is failed; It is characterized in that; This method comprises: when authentication and authorization charging (AAA) server obtain first mobile microwave access global-intercommunication network telephone service (WVS) server information failure, or when can not find a said WVS server, send the CAMEL-Subscription-Information of indication information and/or said terminal called to the 2nd WVS server.

2. method according to claim 1 is characterized in that, the information of a said WVS server is: can support the information that the 2nd WVS server finds a WVS server.

3. method according to claim 1 is characterized in that, the information of a said WVS server comprises following any one or at least a combination:

The sign of a said WVS server;

The IP address of a said WVS server;

The domain name of a said WVS server;

The generic route encapsulation sign of a said WVS server.

4. according to each described method of claim 1 to 3, it is characterized in that said indication information specifically comprises mistake indication or execution result indication;

5. method according to claim 4 is characterized in that, according to said wrong indication or execution result indication, the corresponding operation that said the 2nd WVS server is carried out specifically comprises: end call is set up and attempted.

6. according to each described method of claim 1 to 3, it is characterized in that the CAMEL-Subscription-Information of said terminal called specifically comprises the offline business information that terminal called is signatory.

7. method according to claim 6 is characterized in that, according to the signatory offline business information of said terminal called, the corresponding operation that said the 2nd WVS server is carried out specifically comprises: for said terminal called is carried out offline business.

8. method according to claim 6 is characterized in that, the signatory offline business information of said terminal called specifically comprises and carries out the relevant information of call transfer service;

9. method according to claim 1 is characterized in that, a said WVS server is: the WVS server that terminal called is registered; Said the 2nd WVS server is: send message to aaa server, ask the WVS server of the information of a said WVS server;

10. one kind is obtained the system that handles voip call when called party information is failed; It is characterized in that; This system comprises: transmitting element; Be used for when aaa server obtain a WVS server information failure, or when can not find a said WVS server, send the CAMEL-Subscription-Information of indication information and/or said terminal called to the 2nd WVS server.

11. system according to claim 10 is characterized in that, the information of a said WVS server is: can support the information that the 2nd WVS server finds a WVS server.

12., it is characterized in that said indication information specifically comprises mistake indication or execution result indication according to claim 10 or 11 described systems; The information that said wrong indication or execution result indication are used to notify the said aaa server of said the 2nd WVS server to obtain a said WVS is failed.

13. system according to claim 12 is characterized in that, this system also comprises: performance element is used for said the 2nd WVS server according to said wrong indication or execution result indication, executive termination call setup attempt.

14., it is characterized in that the CAMEL-Subscription-Information of said terminal called specifically comprises the offline business information that terminal called is signatory according to claim 10 or 11 described systems.

15. system according to claim 14 is characterized in that, this system also comprises: performance element is used for said the 2nd WVS server according to the signatory offline business information of said terminal called, for terminal called is carried out offline business.