CN100433909C - Method for transmitting call command from electric switching network to IMS network - Google Patents
Method for transmitting call command from electric switching network to IMS network Download PDFInfo
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- CN100433909C CN100433909C CNB2005100690050A CN200510069005A CN100433909C CN 100433909 C CN100433909 C CN 100433909C CN B2005100690050 A CNB2005100690050 A CN B2005100690050A CN 200510069005 A CN200510069005 A CN 200510069005A CN 100433909 C CN100433909 C CN 100433909C
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Abstract
The present invention discloses a method for transmitting a call signaling from a circuit switching network to an IMS network, and routing information is arranged in a media gateway control function (MGCF). The method also comprises that the MGCF receives the call signaling transmitted by calling user equipment (UE) from the circuit switching network, and converts the call signaling into a session initiation protocol (SIP) message; according to the routing information set in the MGCF, the converted SIP message is transmitted to called UE. When the call signaling is transmitted from the circuit switching network to the IMS network, the method enables the SIP message into which the call signaling is converted to be an SIP message relevant or irrelevant to a session, and the SIP message can be directly routed to the called UE by the MGCF through an S-CSCF serving the called UE without an I-CSCF query, which reduces the interaction time of the call signaling from the circuit switching network to the IMS network so as to relieve the service burden of the IMS network.
Description
Technical field
The present invention relates in internet protocol multimedia subsystem (IMS) network, set up the technology of calling out route, particularly a kind of method from circuit exchange network to IMS network call transmission signaling.
Background technology
Along with the development of broadband network, mobile communication not only is confined to traditional voice communication, and can be in conjunction with multiple media business such as audio frequency, video, picture and texts.Multiple media business by with present that business (presence), short message, webpage (WEB) are browsed, the combining of data service such as locating information, propelling movement business (PUSH) and file-sharing, can satisfy the multiple demand of subscriber equipment (UE).
Under the promotion of several data service application, normal structure such as 3GPP and 3GPP2 has all successively been released the IMS framework, purpose is to use a kind of standardization open architecture to realize diversified multimedia service application in the mobile network, offers more selection of UE and abundanter impression.
At 3GPP version 5 (R5, Release) stage, introduced IMS, IMS is superimposed upon on the packet field network, is made up of CCF (CSCF), MGCF (MGCF), media resource function (MRF) and home signature user server functional entitys such as (HSS).Wherein CSCF 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, carries out session control, and peace preservation association's speech phase is in charge of UE information, produces charge information etc.; P-CSCF is the access point that UE inserts IMS, finishes the UE registration, is responsible for service quality (QoS) control and safety management etc.; I-CSCF is responsible for the intercommunication between the IMS territory, and network topology and configuration are externally hidden in distribution and the selection of management S-CSCF, produce metering data etc.The MGCF control gateway realizes the intercommunication of IMS and other network.MRF provides media resource.The subscription data of HSS storage UE and configuration information etc.
In IMS, use the signaling control protocol of Session Initiation Protocol as IP multimedia session; Use Diameter to carry out information interaction on the Cx interface between HSS and I-CSCF and HSS and the S-CSCF.
IMS is applied in packet network, wireless local (WLAN) network or the next generation (NGN) network that defines among the 3GPP2.
When UE will insert IMS, must use public user identity to register to the IMS network side, public user identity is used for identifying UE at the IMS network, public user identity can use the unified resource identifier (SIP-URI, Session Initiation Protocol UniformResource Indentifier) that is used for Session initiation Protocol.A UE can have one or more public user identity.
At present, need carry out two necessary processing processes in order to realize from the route foundation of the call signaling of circuit exchange network to IMS network.First processing procedure: after the MGCF in the IMS network receives call signaling from circuit-switched network, be routed to I-CSCF, so that make I-CSCF inquiry HSS obtain the routing iinformation of the called UE that receives this call signaling.Second processing procedure: since from the calling of circuit-switched network being used to of carrying indicate called UE for the circuit-switched network support but the unsupported E.164 number of IMS network, so will with this E.164 number translated be the SIP-URI of IMS network support, just can arrive the routing iinformation that HSS inquiry has the called UE of SIP-URI.
In order to realize second processing procedure, can being provided with E.164 in MGCF, number translated is the function of SIP-URI, thereby the E.164 number translated that the call signaling from circuit-switched network is carried is SIP-URI, be carried in the sip message of structure and send to I-CSCF, I-CSCF is stored in the routing iinformation of the called UE of HSS according to the SIP-URI inquiry after changing, routing iinformation I-CSCF according to called UE is routed to called UE by the S-CSCF for the called UE service with call signaling, finishes this SIP session negotiation process of calling UE and called UE.In addition, also can phone unified resource identifier (tel-URI) that the E.164 number of called UE constitutes and the mapping relations between the SIP-URI be set at HSS, thereby I-CSCF is when inquiry HSS, HSS determines the SIP-URI of this call signaling according to mapping relations, determine the routing iinformation of called UE again according to SIP-URI, routing iinformation I-CSCF according to called UE is routed to called UE by the S-CSCF for the called UE service with call signaling, finishes this SIP session negotiation process of calling UE and called UE.
The E.164 number translated that is arranged on MGCF is that the function of SIP-URI can be ENUM DNS interpretative function; Perhaps for the E.164 corresponding relation of number and SIP-URI is set, according to corresponding relation E.164 number translated be the function of SIP-URI.
Though adopting said method can realize setting up from the route of circuit exchange network to IMS network, but said method also exists shortcoming: for the call signaling from the calling procedure of circuit exchange network to IMS network is mutual each time, all to adopt said method to set up route, the E.164 number translated that the function that promptly to take predefined E.164 number translated be SIP-URI is carried call signaling be SIP-URI or in the HSS query mappings relation obtain behind the SIP-URI of the tel-URI correspondence that the E.164 number that MGCF carries from the call signaling of circuit-switched network constitutes, determine the routing iinformation of called UE again according to SIP-URI, by S-CSCF call signaling is routed to called UE for the called UE service according to the routing iinformation I-CSCF of called UE.Therefore,, all must behind HSS, return I-CSCF again to I-CSCF in the transmission course through the MGCF that associates even these call signalings are the signalings in the call process, again by I-CSCF to the Zhongdao called UE of the S-CSCF that service is provided for called UE.Like this, can increase, increase the professional burden of IMS network from the mutual time of the call signaling of circuit exchange network to IMS network.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method from circuit exchange network to IMS network call transmission signaling, this method can be with call signaling when circuit-switched network sends to the IMS network, just can directly be routed to called UE by the sip message that the S-CSCF for the called UE service changes call signaling without the I-CSCF inquiry by MGCF, thereby reduce from the mutual time of the call signaling of circuit exchange network to IMS network, alleviate the professional burden of IMS network.
According to above-mentioned purpose, technical scheme of the present invention is achieved in that
A kind of method from circuit exchange network to IMS network call transmission signaling, MGCF is provided with routing iinformation at MGCF, described routing iinformation is to obtain in the call signaling exchange process in the first time of this calling, this method also comprises: MGCF receives the call signaling that sends from calling subscriber equipment UE in the circuit-switched network, call signaling is converted to the Session initiation Protocol sip message, according to the sip message of changing being sent to called UE at the set routing iinformation of MGCF.
Described routing iinformation is provided with corresponding to session identification;
Session identification also is set and the corresponding relation of the link information of carrying from the call signaling of circuit-switched network at MGCF;
Described call signaling from circuit-switched network carries the link information of circuit-switched link;
Describedly according to set routing iinformation with the process that the sip message of conversion sends to called UE be: MGCF judges that according to set corresponding relation whether link information that call signaling carries is to there being session identification, if, then determine routing iinformation, the sip message of changing is sent to called UE according to determined routing iinformation according to session identification; Otherwise, sip message is sent to called UE according to the normal process process.
Described routing iinformation is the routing iinformation from the serving-call session control function S-CSCF of MGCF through serving for called UE to called UE.
The described process that routing iinformation is set at MGCF is:
The corresponding relation of the unified resource identifier SIP-URI that is used for Session initiation Protocol of phone unified resource identifier tel-URI that the E.164 number of UE constitutes and this UE is set in the home signature user server HSS of IMS network;
After MGCF in the ownership IMS network of called UE received the call signaling of the E.164 number that carries called UE of initiating from calling UE in the circuit-switched network, the Session initiation Protocol sip message of constructing the tel-URI of the E.164 number formation of carrying called UE sent to query call controlled function I-CSCF;
The corresponding relation that I-CSCF inquiry HSS is provided with, obtain the SIP-URI of the tel-URI correspondence that the E.164 number of the entrained called UE of sip message constitutes, the routing iinformation of the UE that preserves according to HSS obtains the routing iinformation of called UE, in returning to the response message of MGCF, carry this routing iinformation, routing iinformation is stored by MGCF.
The described process that routing iinformation is set at MGCF is:
Being provided with E.164 to MGCF in the IMS network, number translated is the function of SIP-URI;
After MGCF receives and is used to indicate the call signaling of E.164 number of called UE from carrying of calling UE in the circuit-switched network, by number translated E.164 is that the E.164 number translated that the function of SIP-URI is carried this call signaling is SIP-URI, and structure carries the sip message of the SIP-URI that is changed and sends to I-CSCF;
The routing iinformation of the UE that I-CSCF inquiry HSS preserves obtains having the routing iinformation of the called UE of the entrained SIP-URI of sip message, carries this routing iinformation in returning to the response message of MGCF, by MGCF routing iinformation is stored.
The function that described E.164 number translated is SIP-URI is an ENUM DNS interpretative function;
Perhaps be: the E.164 corresponding relation of number and SIP-URI is set, according to corresponding relation E.164 number translated be the function of SIP-URI.
Before the routing iinformation that MGCF is provided with sent to called UE with the sip message of changing, this method also comprised in described basis:
MGCF judges whether the sip message of this call signaling conversion is the irrelevant sip message of session, if the sip message of this call signaling being changed according to normal flow sends to called UE; Otherwise, carry out the step that the sip message of conversion is sent to called UE according to the routing iinformation that is provided with at MGCF.
Before the routing iinformation that MGCF is provided with sent to called UE with the sip message of changing, this method also comprised in described basis:
MGCF judges the routing iinformation of the sip message correspondence that self whether is provided with this call signaling conversion, if then carry out the step that the sip message of conversion is sent to called UE according to the routing iinformation that is provided with at MGCF; Otherwise the sip message of this call signaling being changed according to normal flow sends to called UE.
Described routing iinformation is that the user ID corresponding to called UE is provided with;
Described call signaling from circuit-switched network carries the user ID of called UE;
Describedly according to set routing iinformation with the process that the sip message of conversion sends to called UE be: MGCF searches the routing iinformation of whether having preserved called UE according to the user ID of the called UE that call signaling carries, if, then the sip message of changing is sent to called UE according to determined routing iinformation, otherwise, sip message is sent to called UE according to the normal process process.
The user ID of described called UE is at the E.164 number of circuit-switched network sign called UE or at the URI of IMS network identity called UE, this URI is SIP-URI or Tel-URI.
Described being used for identified the E.164 number of called UE and be used for carrying out at the URI of IMS network identity called UE corresponding one by one at circuit-switched network.
From such scheme as can be seen, the present invention is provided with the corresponding relation between the link information of carrying corresponding to the routing iinformation of session identification and session identification and call signaling at MGCF, behind the call signaling of MGCF reception from circuit-switched network, get access to routing iinformation according to the routing iinformation that sets in advance, thereby the sip message of call signaling conversion is routed to called UE according to routing iinformation to the link information correspondence of should call signaling carrying.Therefore, the present invention can will send to the call signaling of IMS network from circuit-switched network, and when the sip message that this call signaling is changed is the session related news, just can directly be routed to called UE without the I-CSCF inquiry by MGCF, thereby reduce from the mutual time of the call signaling of circuit exchange network to IMS network, alleviate the professional burden of IMS network.
Further, the present invention can also store this routing iinformation corresponding to the user ID of called UE, like this, after MGCF receives call signaling from circuit-switched network, also can get access to routing iinformation, thereby call signaling is routed to called UE according to routing iinformation according to the routing iinformation that sets in advance to the user ID of should call signaling carrying.Therefore, the present invention can will send to the call signaling of IMS network from circuit-switched network, and the sip message of this call signaling conversion can be thought when the session irrelevant messages also can be for the session related news, just can directly be routed to called UE without the I-CSCF inquiry by MGCF, thereby reduce from the mutual time of the call signaling of circuit exchange network to IMS network, alleviate the professional burden of IMS network.
In sum, method provided by the invention can be with call signaling when circuit-switched network sends to the IMS network, just can directly by S-CSCF call signaling be routed to called UE without the I-CSCF inquiry for the called UE service by MGCF, thereby reduce from the mutual time of the call signaling of circuit exchange network to IMS network, alleviate the professional burden of IMS network.
Description of drawings
Fig. 1 realizes the method flow diagram of call process from circuit exchange network to IMS network for the present invention;
Fig. 2 realizes sending the signaling process figure that sets up call signaling for the present invention from circuit exchange network to IMS network;
Fig. 3 realizes sending the signaling process figure that calls out release signaling for the present invention from circuit exchange network to IMS network;
Fig. 4 is the irrelevant call signalling flow figure of session for the sip message that the present invention realizes sending after conversion from circuit exchange network to IMS network;
Fig. 5 is the method flow diagram of the present invention from circuit exchange network to IMS network call transmission signaling.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, below lift specific embodiment and, the present invention is further elaborated with reference to accompanying drawing.
In order to realize the present invention, can in the MGCF in the IMS network, preserve routing iinformation, the call signaling that calling UE sends in MGCF receives from circuit-switched network, call signaling is converted to the Session initiation Protocol sip message, according to the sip message of changing being sent to called UE at the set routing iinformation of MGCF.Like this, method provided by the invention just can directly be routed to called UE by the S-CSCF for the called UE service with call signaling by MGCF without the I-CSCF inquiry, thereby reduce from the mutual time of the call signaling of circuit exchange network to IMS network, alleviate the professional burden of IMS network.
The present invention preserves routing iinformation and has two kinds according to the mode that the routing iinformation of being preserved carries out subsequent treatment at MGCF, below respectively this dual mode is elaborated.
First kind of mode.
Because from the calling procedure of circuit exchange network to IMS network, there is a strong possibility, and can to carry out repeatedly the call signaling relevant with this calling procedure mutual.The call signaling first time in the calling procedure need adopt the method for prior art to realize alternately, but for the second time call signaling alternately, for the third time call signaling alternately and to the end the call Signalling exchange then do not need to adopt the method for prior art, and the routing iinformation of this calling is set in MGCF, routing iinformation corresponding to session identification promptly is set, and this routing iinformation is to obtain in the call signaling reciprocal process in the first time of this calling.
Because the call signaling first time from this calling of circuit-switched network, be that call set up signaling can be carried link information, this information is used to indicate circuit-switched link, so MGCF gives this call distribution session identification according to link information, and stores the routing iinformation of this calling corresponding to the session identification that is distributed.Thereby make received by MGCF from the subsequent voice calls signaling of circuit-switched network after, can determine session identification according to the link information that the subsequent voice calls signaling is carried, thereby determine the routing iinformation of respective session sign, the routing iinformation that direct basis is determined arrives called UE by the S-CSCF for the called UE service with the subsequent voice calls signalling route.
Session identification of the present invention can be the call identification (Call ID) of this calling.
What the present invention was provided with in MGCF calls out relevant routing iinformation for the routing iinformation from MGCF to the S-CSCF that serves for called UE and further to the routing iinformation of called UE with this.
Fig. 1 is the method flow diagram of the present invention from circuit exchange network to IMS network realization call process, and the call process is meant from establishing a call to keep calls out last whole process to call release, and its concrete steps are:
After MGCF in step 101, the IMS network receives call set up signaling in this calling procedure, call set up signaling is converted to sip message according to the method for prior art.
MGCF in step 102, the IMS network judges whether the sip message of call set up signaling conversion is the irrelevant sip message of session, if, execution in step 103; Otherwise, execution in step 104.
Can be in advance in MGCF the mapping relations of call signaling in the memory circuit switching network and sip message and sip message whether be the information of the irrelevant or sip message that session is relevant of session.Therefore, whether MGCF just can determine the pairing sip message of call signaling in the circuit-switched network according to mapping relations, thereby be that session the information irrelevant or sip message that session is relevant determines that this sip message is irrelevant sip message of session or the relevant sip message of session according to this sip message that sets in advance.
In the prior art, the sip message that session is relevant refers to a request message after receiving corresponding response message, has just set up a session, preserving sessions state on each state node of this message process.This session has only therein, and a user agent (UA) can be released after initiating to discharge request.
The irrelevant sip message of session refers to a request message after receiving corresponding response message, has just finished this request, does not keep any information on each state node of this message process.
MGCF in step 103, the IMS network will send to the S-CSCF that serves into called UE by the sip message of call set up signaling conversion by the route of determining according to prior art through I-CSCF, to send to called UE by the sip message of call set up signaling conversion by S-CSCF again for the called UE service, set up the connection of calling UE, finish to called UE.
MGCF in step 104, the IMS network will send to the S-CSCF that serves into called UE by the sip message of call set up signaling conversion by the route of determining according to prior art through I-CSCF, to send to called UE by the sip message of call set up signaling conversion by S-CSCF again, set up the connection of calling UE to called UE for the called UE service;
And MGCF stores as the routing iinformation of this calling to the route of called UE by the S-CSCF for the called UE service determined, the routing iinformation that is about to this calling is corresponding to store the link information that the session identification of this distribution carries corresponding to call set up signaling for the session identification of this call distribution.
The called UE of the calling UE of step 105, circuit-switched network in the IMS network initiates to have carried the link information and the call signaling of number E.164.
Step 105 and later step can not followed after step 104 yet, but as an independently process existence.
After MGCF in step 106, the IMS network received this call signaling, the method according to prior art provides was converted to sip message with this call signaling.
The link information that MGCF in step 107, the IMS network carries according to this call signaling judges whether to store the routing iinformation corresponding to this link information, if having, and execution in step 109; Otherwise, execution in step 108.
Owing to the corresponding relation that is provided with at MGCF between link information and the session identification, and be provided with corresponding relation between session identification and the routing iinformation, so the link information of carrying according to this call signaling just can be judged the routing iinformation that whether has this link information correspondence.
MGCF in step 108, the IMS network carries out according to the process of step 102～step 104.
MGCF in step 109, the IMS network is determined to the route that arrives called UE by the S-CSCF for the called UE service according to the routing iinformation corresponding to this link information, to send to the S-CSCF that serves into called UE by determined route by the sip message of this call signaling conversion, the S-CSCF that serves for called UE sends to called UE with this sip message again, is handled at this sip message by called UE.
The called UE of the calling UE of step 110, circuit-switched network in the IMS network initiates to have carried the link information and the release signaling of number E.164.
Step 110 and later step can not followed after step 109 yet, but as an independently process existence.
After MGCF in step 111, the IMS network receives this release signaling, provide method, this release signaling is converted to sip message, i.e. BYE message according to prior art.
MGCF in step 112, the IMS network handles according to the process of step 107～step 109, after feasible S-CSCF for the called UE service receives BYB message, is transmitted to called UE.
Step 114, receive MGCF in the IMS network of this acknowledge message and discharge between MGCF and the called UE and be the session of this call setup, end.
In step 106, after MGCF in the IMS network receives this call signaling, whether the sip message that also can judge this call set up signaling conversion earlier is the irrelevant sip message of session, if directly the method according to prior art sends to called UE with call set up signaling; Otherwise, the subsequent process of execution in step 106 again.
Fig. 2 realizes sending the signaling process figure that sets up call signaling from circuit exchange network to IMS network for the present invention, and establishing circuit-switched network is Public Switched Telephony Network (PSTN), and its concrete steps are:
Step 201, MGCF by H.248 order set up on the loading end with PSTN between be connected.
Step 202, MGCF structure SIP invite (INVITE) message, and the message that structure is good sends to I-CSCF.
This I-CSCF can set in advance the I-CSCF of I-CSCF address for having MGCF, also can be the optional I-CSCF of MGCF.
Step 203, I-CSCF send position enquiring request (Location Query) to the HSS of storage called UE routing iinformation, obtain the routing iinformation of called UE.
Step 204, HSS return the routing iinformation of called UE to I-CSCF.
Step 205, I-CSCF are determined to the S-CSCF that serves into called UE according to the routing iinformation of called UE, further are determined to the route of called UE, send the SIP INVITE for the S-CSCF for the called UE service.
Step 206～step 207, the S-CSCF that serves for called UE serve control and are transmitted to called UE according to the route of called UE the SIP INVITE being jumped functional entity by next called UE.
According to prior art, the termination network of the functional entity of next jumping of S-CSCF and this calling is relevant, and when this call ending during at the IMS network, this functional entity is P-CSCF; When this call ending during at the PSTN network, this functional entity is BGCF.
Step 208～210, called UE send to provide to S-CSCF replys (Offer Response) message, and S-CSCF gives MGCF by I-CSCF with Offer Response forwards, the Media Stream ability of this message indication called UE.
Step 211, MGCF and guide MGW to reserve the session resource requirement by H.248 ordering modification to connect parameter.
The required media resource of session that step 212～214, MGCF decision can provide, MGCF is according to route that is determined to S-CSCF and the route that further arrives called UE, through I-CSCF with provide the S-CSCF of service that RACK response acknowledge (Response Conf) is jumped functional entity by next to be transmitted to called UE for called UE.
Step 215～217, called UE S-CSCF and the I-CSCF through service is provided for called UE returns confirmation affirmation (Conf ACK) to MGCF.
Step 218, MGW reserved resource.
After step 219～221, resource reservation were finished, MGCF was transmitted to called UE through I-CSCF with for called UE provides the S-CSCF of service will reserve confirmation (Reservation Conf) by next jumping functional entity.
Step 222～224, called UE are through returning Reservation Conf to MGCF for called UE provides the S-CSCF of service and I-CSCF.
Step 225～227, called UE are through carrying out ring (Ringing) process for called UE provides the S-CSCF of service and I-CSCF.
After step 229～231, called UE were replied, S-CSCF and I-CSCF through service is provided for called UE sent SIP 200 OK message to MGCF.
Step 233, MGCF can begin the transmission of Media Stream by H.248 ordering notice MGW.
(ACK) confirmed through I-CSCF and the affirmation message SIP that provides the S-CSCF of service to return SIP 200 OK for called UE in step 234～336, MGCF.
Fig. 3 realizes sending the signaling process figure that calls out release signaling from circuit exchange network to IMS network for the present invention, and establishing circuit-switched network is PSTN, and its concrete steps are:
Step 300, PSTN send to MGCF by media gateway (MGW) and call out release signaling.
Step 301, MGCF are by the H.248 connection between order release PSTN and the IMS network.
Step 302, MGCF will call out release signaling and be converted to goodbye (BYE) message, pass through the routing iinformation of this calling of being stored and determine route, send to the S-CSCF that provides service for called.
Step 303～304, for after the called S-CSCF that service is provided receives BYE message, called UE is served control, be transmitted to called UE.
Step 305～306, called UE send 200 OK message for the MGCF in the IMS network by the S-CSCF for the called UE service through determined route, and this calling of removing from the called UE to MGCF connects.
The routing iinformation of this calling that step 307, MGCF deletion are stored sends replying of calling release signaling to PSTN.
When the sip message from the conversion of the call signaling of circuit-switched network is not the sip message relevant with session, information (MESSAGE) as short message conversion, then handle according to the described method of Fig. 4, Fig. 4 is the irrelevant call signalling flow figure of session for the sip message that the present invention realizes sending after conversion from circuit exchange network to IMS network, if circuit-switched network is PSTN, its concrete steps are:
Step 400, PSTN send the signaling of carrying short message by MGW to MGCF.
Step 401～402, MGCF are SIP MESSAGE with this circuit domain short message conversion, judge that SIP MESSAGE is the session irrelevant messages, thereby do not need to use bearing resource, and SIPMESSAGE is sent to I-CSCF.
Step 403, I-CSCF send Location Query to the HSS of storage called UE routing iinformation, obtain the routing iinformation of called UE.
Step 404, HSS return the routing iinformation of called UE to I-CSCF.
Step 405, I-CSCF are determined to the S-CSCF that serves into called UE according to the routing iinformation of called UE, further are determined to the route of called UE, send SIP MESSAGE message for the S-CSCF for the called UE service.
Step 406～step 407, the S-CSCF that serves for called UE serve control and give called UE according to the route to called UE with SIP MESSAGE forwards called UE.
After step 408～410, called UE were replied, S-CSCF and I-CSCF through service is provided for called UE sent 200OK message to MGCF.
Step 411, MGCF send acknowledge message to PSTN.
As can be seen from Figure 4, when the sip message after processing is from circuit-switched network and conversion is the call signaling of the irrelevant sip message of session, identical with the processing mode of prior art.
The second way.
In order to realize the present invention better, can not distinguish also whether the sip message that is converted to by the call signaling from circuit-switched network is the irrelevant sip message of session, still be the relevant sip message of session, as long as the call signaling that sends to the IMS network from circuit-switched network is arranged, the routing iinformation of the called UE that the stored calls signaling will send in the MGCF of IMS network just, promptly with the routing iinformation of the storage mode storage called UE of the corresponding routing iinformation of the user ID of called UE, so that make the follow-up call signaling that sends to same called UE directly be routed to called UE according to the routing iinformation of the called UE of being stored by the S-CSCF that serves for called UE.
The user ID of described called UE is at the E.164 number of circuit-switched network sign called UE or at the URI of IMS network identity called UE, this URI is SIP-URI or Tel-URI.
The present invention also can associate the user ID that is used in the same called UE of heterogeneous networks sign, has both set up to be used at the E.164 number of circuit-switched network sign called UE and to be used for corresponding relation between the URI of IMS network identity called UE.
Certainly,,, can also identify the session identification of this routing iinformation correspondence as SIP-URI or E.164 the routing iinformation of the storage mode storage called UE of the corresponding routing iinformation of number the time in user ID with called UE, and further corresponding link information.
Fig. 5 is the method flow diagram of the present invention from circuit exchange network to IMS network call transmission signaling, and its concrete steps are:
Step 500, in the call process, the called UE of the calling UE of circuit-switched network in the IMS network initiates to have carried the call signaling of the E.164 number of called UE.
After MGCF in step 501, the IMS network receives call signaling in this calling procedure, call signaling is converted to sip message according to the method for prior art.
MGCF in step 502, the IMS network will store as the routing iinformation of called UE to the route of called UE for the S-CSCF of called UE service according to definite the passing through of prior art, promptly as to having user ID, as SIP-UR or E.164 the routing iinformation of the called UE of number store.
MGCF in step 503, the IMS network, will send to called UE by the sip message that call signaling is changed by the S-CSCF that serves for called UE again and handle for the S-CSCF of called UE service will send to S-CSCF into the called UE service through I-CSCF by the sip message of call signaling conversion to the route of called UE by passing through of determining according to prior art.
The calling UE of step 504, the circuit-switched network called UE in the IMS network once more initiates to have carried the call signaling of the E.164 number of called UE.
Step 504 and later step can not followed after step 503 yet, but as an independently process existence.
After MGCF in step 505, the IMS network received this call signaling, the method according to prior art provides was converted to sip message with this call signaling.
E.164 the number of the called UE that the MGCF in step 506, the IMS network carries according to this call signaling judges whether to store the routing iinformation corresponding to called UE, if, execution in step 508; Otherwise, execution in step 507.
In the present invention, the user ID that MGCF also can carry according to this call signaling judges whether to store routing iinformation corresponding to the called UE with this user ID as SIP-URI, if, execution in step 508; Otherwise, execution in step 507.
MGCF in step 507, the IMS network carries out according to the process of step 501～step 503.
MGCF in step 508, the IMS network is according to the route of determining to arrive by the S-CSCF for the called UE service called UE corresponding to the routing iinformation of this called UE, to send to S-CSCF by determined route by the sip message of this call signaling conversion, correspondingly handle for the S-CSCF of called UE service sends to called UE with this sip message again into the called UE service.
The SIP MESSAGE message that sip message of the present invention and that session is irrelevant can obtain for short message peer-peer protocol (SMPP) message conversion by circuit-switched network also can be SIPOPTION message and SIP INFO or the like.
Circuit-switched network of the present invention can be PSTN.
Because the present invention is provided with corresponding relation between the link information of carrying corresponding to the routing iinformation of session identification and session identification and call signaling at MGCF in advance, behind the call signaling of MGCF reception from circuit-switched network, get access to routing iinformation according to the routing iinformation that sets in advance, thereby be routed to call signaling for the S-CSCF of called UE service and further be routed to called UE according to routing iinformation to the link information correspondence of should call signaling carrying.Therefore, the present invention can will send to the call signaling of IMS network from circuit-switched network, and when the sip message of this call signaling conversion is the session related news, just can directly be routed to called UE by S-CSCF without the I-CSCF inquiry for the called UE service by MGCF, thereby reduce from the mutual time of the call signaling of circuit exchange network to IMS network, alleviate the professional burden of IMS network.
Further, the present invention is when MGCF storage routing iinformation, also this routing iinformation can be stored corresponding to the user ID of called UE, like this, after MGCF receives call signaling from circuit-switched network, also can get access to routing iinformation, thereby call signaling is routed to called UE by the S-CSCF for the called UE service according to routing iinformation according to the routing iinformation that sets in advance to the user ID of should call signaling carrying.Therefore, the present invention can will send to the call signaling of IMS network from circuit-switched network, and the sip message of this call signaling conversion can be thought when the session irrelevant messages also can be for the session related news, also can directly be routed to called UE by S-CSCF without the I-CSCF inquiry for the called UE service by MGCF, thereby reduce from the mutual time of the call signaling of circuit exchange network to IMS network, alleviate the professional burden of IMS network.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1, a kind of method from circuit exchange network to IMS network call transmission signaling, it is characterized in that, MGCF is provided with routing iinformation at MGCF, described routing iinformation is to obtain in the call signaling exchange process in the first time of this calling, this method also comprises: MGCF receives the call signaling that sends from calling subscriber equipment UE in the circuit-switched network, call signaling is converted to the Session initiation Protocol sip message, according to the sip message of changing being sent to called UE at the set routing iinformation of MGCF.
2, the method for claim 1 is characterized in that, described routing iinformation is provided with corresponding to session identification;
Session identification also is set and the corresponding relation of the link information of carrying from the call signaling of circuit-switched network at MGCF;
Described call signaling from circuit-switched network carries the link information of circuit-switched link;
Describedly according to set routing iinformation with the process that the sip message of conversion sends to called UE be: MGCF judges that according to set corresponding relation whether link information that call signaling carries is to there being session identification, if, then determine routing iinformation, the sip message of changing is sent to called UE according to determined routing iinformation according to session identification; Otherwise, sip message is sent to called UE according to the normal process process.
3, the method for claim 1 is characterized in that, described routing iinformation is the routing iinformation from the serving-call session control function S-CSCF of MGCF through serving for called UE to called UE.
4, the method for claim 1 is characterized in that, the described process that routing iinformation is set at MGCF is:
The corresponding relation of the unified resource identifier SIP-URI that is used for Session initiation Protocol of phone unified resource identifier tel-URI that the E.164 number of UE constitutes and this UE is set in the home signature user server HSS of IMS network;
After MGCF in the ownership IMS network of called UE received the call signaling of the E.164 number that carries called UE of initiating from calling UE in the circuit-switched network, the Session initiation Protocol sip message of constructing the tel-URI of the E.164 number formation of carrying called UE sent to query call controlled function I-CSCF;
The corresponding relation that I-CSCF inquiry HSS is provided with, obtain the SIP-URI of the tel-URI correspondence that the E.164 number of the entrained called UE of sip message constitutes, the routing iinformation of the UE that preserves according to HSS obtains the routing iinformation of called UE, in returning to the response message of MGCF, carry this routing iinformation, routing iinformation is stored by MGCF.
5, the method for claim 1 is characterized in that, the described process that routing iinformation is set at MGCF is:
Being provided with E.164 to MGCF in the IMS network, number translated is the function of SIP-URI;
After MGCF receives and is used to indicate the call signaling of E.164 number of called UE from carrying of calling UE in the circuit-switched network, by number translated E.164 is that the E.164 number translated that the function of SIP-URI is carried this call signaling is SIP-URI, and structure carries the sip message of the SIP-URI that is changed and sends to I-CSCF;
The routing iinformation of the UE that I-CSCF inquiry HSS preserves obtains having the routing iinformation of the called UE of the entrained SIP-URI of sip message, carries this routing iinformation in returning to the response message of MGCF, by MGCF routing iinformation is stored.
6, method as claimed in claim 5 is characterized in that, the function that described E.164 number translated is SIP-URI is an ENUM DNS interpretative function;
Perhaps be: the E.164 corresponding relation of number and SIP-URI is set, according to corresponding relation E.164 number translated be the function of SIP-URI.
7, the method for claim 1 is characterized in that, before the routing iinformation that MGCF is provided with sent to called UE with the sip message of changing, this method also comprised in described basis:
MGCF judges whether the sip message of this call signaling conversion is the irrelevant sip message of session, if the sip message of this call signaling being changed according to normal flow sends to called UE; Otherwise, carry out the step that the sip message of conversion is sent to called UE according to the routing iinformation that is provided with at MGCF.
8, the method for claim 1 is characterized in that, before the routing iinformation that MGCF is provided with sent to called UE with the sip message of changing, this method also comprised in described basis:
MGCF judges the routing iinformation of the sip message correspondence that self whether is provided with this call signaling conversion, if then carry out the step that the sip message of conversion is sent to called UE according to the routing iinformation that is provided with at MGCF; Otherwise the sip message of this call signaling being changed according to normal flow sends to called UE.
9, the method for claim 1 is characterized in that, described routing iinformation is that the user ID corresponding to called UE is provided with;
Described call signaling from circuit-switched network carries the user ID of called UE;
Describedly according to set routing iinformation with the process that the sip message of conversion sends to called UE be: MGCF searches the routing iinformation of whether having preserved called UE according to the user ID of the called UE that call signaling carries, if, then the sip message of changing is sent to called UE according to determined routing iinformation, otherwise, sip message is sent to called UE according to the normal process process.
10, method as claimed in claim 9 is characterized in that, the user ID of described called UE is at the E.164 number of circuit-switched network sign called UE or at the URI of IMS network identity called UE, this URI is SIP-URI or Tel-URI.
11, method as claimed in claim 10 is characterized in that, described being used for identified the E.164 number of called UE and be used for carrying out at the URI of IMS network identity called UE corresponding one by one at circuit-switched network.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100690050A CN100433909C (en) | 2005-04-29 | 2005-04-29 | Method for transmitting call command from electric switching network to IMS network |
| PCT/CN2006/000500 WO2006099813A1 (en) | 2005-03-25 | 2006-03-24 | A method , system and number transform entity for establishing a call route from circuit switched network to ims network |
| PCT/CN2006/000501 WO2006099814A1 (en) | 2005-03-25 | 2006-03-24 | A method for setting up the call route from a circuit switched network to an ims network and a number translating entity |
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| CNB2005100690050A CN100433909C (en) | 2005-04-29 | 2005-04-29 | Method for transmitting call command from electric switching network to IMS network |
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| CN1856166A CN1856166A (en) | 2006-11-01 |
| CN100433909C true CN100433909C (en) | 2008-11-12 |
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| CN101193442B (en) * | 2006-11-23 | 2010-12-08 | 华为技术有限公司 | A system, method and device for realizing mobile multimedia call |
| CN104767679B (en) * | 2014-01-08 | 2018-12-18 | 腾讯科技（深圳）有限公司 | A kind of method and device for transmitting data in network system |
| CN115766668A (en) * | 2021-09-03 | 2023-03-07 | 中国移动通信集团山东有限公司 | Automatic disaster recovery method, electronic device, and storage medium |
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