CN101582950B - Ringing state switching method and system in IP multimedia subsystem - Google Patents
Ringing state switching method and system in IP multimedia subsystem Download PDFInfo
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- CN101582950B CN101582950B CN2009101423816A CN200910142381A CN101582950B CN 101582950 B CN101582950 B CN 101582950B CN 2009101423816 A CN2009101423816 A CN 2009101423816A CN 200910142381 A CN200910142381 A CN 200910142381A CN 101582950 B CN101582950 B CN 101582950B
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Abstract
The invention discloses a ringing state switching method and a system in an IP multimedia subsystem. The method comprises the following steps: after receiving a switching request message sent by an attendant console client, an attendant console server restores a calling terminal in a hold mode, and initiates early media negotiation between the calling terminal and IMS core network equipment to lead the calling terminal to listen to ring back tone; and after a called terminal picks up the telephone, the attendant console server initiates media negotiation between the calling terminal and the called terminal according to whether the calling terminal and the called terminal support and need resource reservation, and establishes media connection between the calling terminal and the called terminal. By applying the invention, the existing SIP message is utilized to realize the switching of ringing state, and resources are reserved for user equipments needing resource reservation in the switching process; in addition, the invention is compatible with the user equipments which do not support the Precondition mechanism, can well support the existing regulations and standards, and has good compatibility with each network element in the existing IMS environment.
Description
Technical field
The present invention relates to console technical field, relate in particular to ringing state switching method and system in a kind of IP Multimedia System (IMS, IP Multimedia Subsystem) based on packet switching.
Background technology
IMS is an IP-based standards system that is independent of access technology, and it and existing voice and data network can intercommunications, no matter are fixed network users (for example PSTN, ISDN, internet) or mobile subscriber (for example GSM, CDMA).The IMS system makes various types of terminals can set up the IP communication of equity, and can obtain needed service quality.Big customer's console is widely used among the big customers such as hotel, large-scale enterprises and institutions, has become the important source of operator's income.Big customer's console under the IMS environment can make full use of the flexibility of the open and professional expansion of IMS framework, for various user terminals provide service.
Ringing state switching is an important service of big customer's console, and its operation flow is: calling subscriber A dials console B, and console B accepts this calling; Console B keeps and should call out; And call out called subscriber C, and console is selected switching during the C ring, and transfer successfully back A and C directly converse.
The transfer service of IMS environment has two kinds: conversation state switching and ringing state switching, its difference be, the conversation state switching begins to transfer after calling subscriber A and called subscriber C entering conversation state, and ringing state switching occurs in before called subscriber C receives calls.Compare with the conversation state switching, ringing state switching also need make calling subscriber A in switching process, hear ring-back tone, after C replys by the time, and the speech channel of connecting A and C.Present forwarding method is mainly all realized through SIP expansion header field: a kind of is in console is issued the BYE request message of calling subscriber A, to add the Also header field, adds the address of called subscriber C, initiatively initiates the calling to C by A.In addition; Among the draft draft-ietf-sipping-cc-transfer-12 of IETF a kind of forwarding method is provided, i.e. after A and the B conversation, B sends REFER (seeing the RFC3515 agreement for details) message and gives A; In REFER message, carry the address of C, by the calling of A initiation and C.These two kinds of methods all are to provide switching destination address C to by relay terminal A by console B; By the calling of being initiated by relay terminal A with switching target C; This just requires all to be supported these SIP expansion header fields by relay terminal A and related network elements; But owing to the network element in the IMS environment, terminal possibility production year can not all be supported these header fields just for early.Moreover, because IMS has introduced Precondition (being resource reservation) notion, require all resource after resource reservation is accomplished, could set up session.Simultaneously owing to exist simultaneously in the IMS environment and support and need the terminal of resource reservation and the terminal of support resource future mechanism not; Thereby the adapting system that is suitable in the IMS environment and forwarding method must compatible simultaneously support and need the terminal, support of the terminal of resource reservation, not support resource reservation but do not need the terminal of resource reservation, and these requirements obviously are that present forwarding method is beyond one's reach.So current needs provide a kind of technical scheme; Solve the problem that ringing state switching is carried out at the various terminals of inserting the IMS environment; Wherein require this scheme both can the compatible terminal of supporting and needing resource reservation, also can compatible not support resource reserve or support but do not need the terminal of resource reservation.
Summary of the invention
Technical problem to be solved by this invention provides ringing state switching method and system in a kind of IP Multimedia System; Utilize existing sip message to realize ringing state switching; And the subscriber equipment to needing resource reservation has carried out resource reservation in switching process; And the compatible subscriber equipment of not supporting Precondition mechanism can be supported existing codes and standards well, and each network element in the existing IMS environment is had good compatibility.
In order to address the above problem, the invention provides ringing state switching method in a kind of IP Multimedia System, comprising:
After call desk server was received the transfer-request message of console client transmission, the calling terminal that will be in hold mode recovered, and initiates the early media negotiation of calling terminal and IP Multimedia System IMS equipment of the core network then, makes calling terminal listen ring-back tone;
Behind the called end off-hook, whether said call desk server supports with whether needs resource reservation to initiate the media negotiation of calling terminal and called end according to said calling terminal and said called end, and the medium of setting up said calling terminal and said called end then are connected.
The present invention also provides ringing state switching system in a kind of IP Multimedia System, comprises calling terminal, called end and IP Multimedia System IMS equipment of the core network, also comprises console client and call desk server, wherein,
Said console client is used for, and sends transfer-request message to said call desk server;
Said call desk server is used for; After receiving the transfer-request message of said console client transmission; The said calling terminal that will be in hold mode recovers, and initiates the early media negotiation of this calling terminal and said IMS equipment of the core network then, makes this calling terminal listen ring-back tone; Behind said called end off-hook, whether support needs resource reservation to initiate the media negotiation of calling terminal and called end according to said calling terminal and said called end with whether, the medium of setting up said calling terminal and said called end then are connected.
Compared with prior art, use the present invention, can support existing codes and standards; Overcome the limitation of current techniques, have favorable compatibility, can carry out ringing state switching the various terminals of inserting the IMS environment; Both can the compatible terminal of supporting and needing resource reservation; Also can compatible not support resource reserve or support but do not need the terminal of resource reservation, and related network elements is not had specific (special) requirements, saved network rebuilding cost.
Description of drawings
Fig. 1 is the flow chart of ringing state switching method in the IP Multimedia System of the present invention;
Fig. 2 is the structural representation of ringing state switching system in the IP Multimedia System of the present invention;
Fig. 3 is the flow chart of the implementation method of ringing state switching of the present invention;
Fig. 4 be the present invention in the caller support and need resource reservation, called support or not under the support resource reservation situation, the flow chart of the instance of media negotiation before the called party answer;
Fig. 5 be the present invention in the caller support and need resource reservation, called support but do not need under the situation of resource reservation the flow chart of the instance of calling and called media negotiation behind the called party answer.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Main design of the present invention is: after call desk server receives the transfer-request message of console client transmission; The calling terminal that will be in hold mode recovers; Initiate the early media negotiation of calling terminal and IMS equipment of the core network then, make calling terminal listen ring-back tone; Behind the called end off-hook, whether call desk server supports with whether the media negotiation of the initiation of needs resource reservation and calling terminal, called end according to calling terminal and called end, and the medium of finally setting up calling terminal and called end are connected.
As shown in Figure 1, ringing state switching method in the IP Multimedia System of the present invention may further comprise the steps:
Step 100: after call desk server received the transfer-request message of console client transmission, call desk server was replied 200OK message; Call desk server sends Re-Invite message to the console client, and the console client is received back answer 200OK message, wherein carries whole media informations of its support.Call desk server sends Re-Invite message to calling terminal, wherein carries whole media informations that the console client is supported, calling terminal is replied message; Call desk server sends ACK message to the console client, wherein carries the media information of calling terminal coupling, and calling terminal is resumed;
Call desk server is after calling terminal sends Re-Invite message, and calling terminal is replied the step of message, is divided into following steps:
Calling terminal is then replied 183 message as if supporting and needing resource reservation, wherein carries the media information of calling terminal coupling; Otherwise reply 200OK message, wherein carry the media information of calling terminal coupling.
Step 110: call desk server sends Re-Invite message to calling terminal, and calling terminal is received back answer 200OK message, carries whole media informations of its support; Call desk server sends UPDATE message to the IMS equipment of the core network, carries the media information of calling terminal with the form of Early media, and carries the media information of console client with the form of conversation media; The IMS equipment of the core network is transmitted UPDATE message to called end, only carries the media information of console client, and this message is used to remove the console client and is connected with the medium of called end.Called end is replied 200OK message, the media answer information of carrying called end.The IMS equipment of the core network to call desk server, and carries the ring-back tone media information with the form of Early media with the 200OK forwards in 200OK message; Call desk server sends ACK message to calling terminal, carries the ring-back tone media information with the mode of conversation media, and calling terminal is listened ring-back tone after receiving message;
Call desk server sends ACK message to calling terminal, carries the ring-back tone media information with the mode of conversation media, and calling terminal can be listened the step of ring-back tone, is divided into following steps:
If calling terminal not support resource reserves or supports but do not need resource reservation that then calling terminal can be listened ring-back tone this moment; Otherwise calling terminal carries out resource reservation; Send Re-Invite message to call desk server after reserving successfully; Carry and reserve the successfully new calling terminal media information in back; After call desk server is received, send UPDATE message once more, wherein carry new calling terminal media information with the form of Early media to the IMS equipment of the core network.The IMS equipment of the core network is replied 200OK message, wherein carries new ring-back tone media information with the form of Early media, after call desk server is received, new ring-back tone media information is sent to calling terminal through 200OK message, makes calling terminal listen ring-back tone.
Step 120: behind the called end off-hook, call desk server is initiated the media negotiating process of calling terminal and called end as intermediate ends, sets up calling terminal after consulting to accomplish and is connected with the medium of called end.
Specifically may further comprise the steps: behind the called end off-hook, call desk server sends Re-Invite message to calling terminal, and calling terminal is received back answer 200OK message, wherein carries all media informations of its support; Call desk server receives whether the back supports with whether needs resource reservation to begin to initiate the media negotiation of calling terminal and called end according to said calling terminal and said called end; Send Re-Invite message to called end; Wherein carry the media information of calling terminal; And the media information after the called end coupling is sent to calling terminal carry out media negotiation, set up calling terminal after consulting to accomplish and be connected with the medium of called end.
Whether call desk server is to support with whether needs resource reservation to initiate the media negotiation of calling terminal and called end according to calling terminal and called end, wherein,
If calling terminal and called end are all supported and are needed resource reservation, after then called end is received Re-Invite message, will reply 183 message to call desk server, wherein carry the media information of called end coupling; After call desk server is received, send ACK message, wherein carry the media information of called end coupling to calling terminal; Calling terminal is after the resource reservation success; To send Re-Invite message to call desk server, wherein carry the media information after the resource reservation success, after call desk server is received; Send UPDATE message to called end; Wherein carry the calling terminal media information after the resource reservation success, called end is replied 200OK message, wherein carries the media information of called end coupling.Send 200OK message to calling terminal after call desk server is received, wherein carry the media information of called end coupling; After the success of called end resource reservation, send 200OK message to call desk server, call desk server is received back answer ACK message, and calling terminal and called end get into talking state.
If calling terminal support and need resource reservation, called end not support resource are reserved or are supported but do not need resource reservation, after then called end is received Re-Invite message, will reply 200OK message to call desk server, wherein carry the media information that called end matees.After call desk server is received, send ACK message, wherein carry the media information of called end coupling to calling terminal; Calling terminal will send Re-Invite message to call desk server after the resource reservation success; Wherein carry the media information after the resource reservation success; After call desk server is received, send Re-Invite message, wherein carry the calling terminal media information after the resource reservation success to called end; Called end is replied 200OK message, wherein carries the media information of called end coupling; Send 200OK message to calling terminal after call desk server is received, wherein carry the media information of called end coupling.Calling terminal and called end are accomplished media negotiation, get into talking state.
If calling terminal not support resource reserves or support but do not need resource reservation, called end support and need resource reservation after then called end is received Re-Invite message, will be replied 183 message to call desk server, wherein carry the media information that called end matees; After call desk server is received, send ACK message, wherein carry the media information of called end coupling to calling terminal.Called end finishes the back at resource reservation and sends 200OK message to call desk server.Calling terminal and called end are accomplished media negotiation, get into talking state.
If calling terminal and called end all not support resource reserve or all support but do not need resource reservation, after then called end is received Re-Invite message, will send 200OK message to call desk server, wherein carry the media information that called end matees; After call desk server is received, send ACK message, wherein carry the media information of called end coupling to calling terminal.Calling terminal and called end are accomplished media negotiation, get into talking state.
As shown in Figure 2, ringing state switching system in a kind of IP Multimedia System comprises calling terminal, called end, IP Multimedia System IMS equipment of the core network, console client and call desk server, wherein,
Said console client is used for, and sends transfer-request message to said call desk server;
Said call desk server is used for; After receiving the transfer-request message of said console client transmission; The said calling terminal that will be in hold mode recovers, and initiates the early media negotiation of this calling terminal and said IMS equipment of the core network then, makes this calling terminal listen ring-back tone; Behind said called end off-hook, whether support needs resource reservation to initiate the media negotiation of calling terminal and called end according to said calling terminal and said called end with whether, the medium of setting up said calling terminal and said called end then are connected.
Said call desk server is that the said calling terminal that will be in hold mode in the following manner recovers:
Said call desk server is replied 200OK message after receiving the transfer-request message that said console client sends; Send Re-Invite message to this console client; Receive the 200OK message that this console client is replied, wherein carry whole media informations that the console client is supported; Send Re-Invite message to said calling terminal, wherein carry whole media informations that the console client is supported; Receive the message that calling terminal is replied, wherein carry the media information of calling terminal coupling; Send ACK message to this console client, wherein carry the media information of calling terminal coupling, this calling terminal is resumed;
Said call desk server is to make said calling terminal listen ring-back tone in the following manner:
Said call desk server sends Re-Invite message to said calling terminal, receives the 200OK message that said calling terminal is replied, and wherein carries whole media informations that calling terminal is supported; Send UPDATE message to said IMS equipment of the core network, wherein carry the media information of calling terminal and the media information of console client; Receive the 200OK message of the called end transmission of this IMS equipment of the core network forwarding, wherein carry the ring-back tone media information; Send ACK message to this calling terminal, wherein carry the ring-back tone media information, make this calling terminal listen ring-back tone;
Behind the said called end off-hook, said call desk server is the media negotiation of initiating calling terminal and called end in the following manner, and the medium of setting up said calling terminal and said called end are connected:
Behind the said called end off-hook, said call desk server sends Re-Invite message to said calling terminal, receives the 200OK message that this calling terminal is replied, and wherein carries all media informations that calling terminal is supported; Whether support needs resource reservation to begin to initiate the media negotiation of calling terminal and called end according to calling terminal and called end with whether; Send Re-Invite message to this called end; Wherein carry the media information of calling terminal; And the media information after the called end coupling is sent to this calling terminal carry out media negotiation, set up this calling terminal after consulting to accomplish and be connected with the medium of this called end.
Said IMS equipment of the core network is used for, receive the UPDATE message that said call desk server sends after, transmit UPDATE message to said called end, wherein only carry the media information of console client; Receive this called end and reply 200OK message, the media answer information of wherein carrying called end; The 200OK forwards that receives to this call desk server, is wherein carried the ring-back tone media information.
Said call desk server sends UPDATE message to said IMS equipment of the core network, is the media information that carries calling terminal with the form of Early media, and carries the media information of console client with the form of conversation media;
Said IMS equipment of the core network is to carry the ring-back tone media information with the form of Early media with the 200OK forwards that receives to said call desk server;
Said call desk server sends ACK message to said calling terminal after receiving the 200OK message that said IMS equipment of the core network transmits, and is to carry the ring-back tone media information with the mode of conversation media.
After said calling terminal was received the Re-Invite message of said call desk server transmission, this calling terminal was replied message, is to accomplish in the following manner:
Said calling terminal is as if supporting and need resource reservation that then this calling terminal is replied 183 message, wherein carries the media information of calling terminal coupling; Otherwise this calling terminal is replied 200OK message, wherein carries the media information of calling terminal coupling.
Whether said call desk server supports with whether needs resource reservation to initiate the media negotiation of calling terminal and called end according to calling terminal and called end, and the medium of setting up said calling terminal and said called end then are connected, and are to accomplish in the following manner:
If said calling terminal and said called end support all and need resource reservation that said call desk server receives 183 message that called end is replied after said called end sends Re-Invite message, wherein carry the media information of called end coupling; Send ACK message to calling terminal, wherein carry the media information of called end coupling; Receive the Re-Invite message that calling terminal sends in resource reservation success back, wherein carry the calling terminal media information after the resource reservation success; Send UPDATE message to called end, wherein carry the calling terminal media information after the resource reservation success; Receive the 200OK message that called end is replied, wherein carry the media information of called end coupling; Receive the 200OK message that called end sends in resource reservation success back, reply ACK message to called end, the medium of setting up said calling terminal and said called end are connected;
If said calling terminal support and need resource reservation; Said called end not support resource is reserved or is supported but do not need resource reservation; Said call desk server is after said called end sends Re-Invite message, and the 200OK message that receives the called end answer is wherein carried the media information of called end coupling; Send ACK message to calling terminal, wherein carry the media information of called end coupling; Receive the Re-Invite message that calling terminal sends in resource reservation success back, wherein carry the calling terminal media information after the resource reservation success; Send Re-Invite message to called end, wherein carry the calling terminal media information after the resource reservation success; Receive the 200OK message that called end is replied, wherein carry the media information of called end coupling; Send 200OK message to calling terminal, wherein carry the media information of called end coupling; Calling terminal and called end are accomplished media negotiation, and the medium of setting up said calling terminal and said called end are connected;
If said calling terminal not support resource is reserved or is supported but do not need resource reservation; Said called end support and need resource reservation; Said call desk server is after said called end sends Re-Invite message; Receive 183 message that called end is replied, wherein carry the media information of called end coupling; Send ACK message to calling terminal, wherein carry the media information of called end coupling; Receive called end and finish the back to the 200OK message of sending at resource reservation; Calling terminal and called end are accomplished media negotiation, and the medium of setting up said calling terminal and said called end are connected;
If said calling terminal and said called end all not support resource reserve or all support but do not need resource reservation; Said call desk server is after said called end sends Re-Invite message; Receive the 200OK message that called end is replied, wherein carry the media information of called end coupling; Send ACK message to calling terminal, wherein carry the media information of called end coupling; Calling terminal and called end are accomplished media negotiation, and the medium of setting up said calling terminal and said called end are connected.
Below in conjunction with instantiation the present invention is described further.
See also Fig. 3, the implementation method of ringing state switching of the present invention may further comprise the steps:
Step 3-100, the calling subscriber is in held state, and the called subscriber is in ringing condition.
Step 3-101; The console client is sent Message message to call desk server; Current calling subscriber and the current called subscriber who is in ringing condition who is in hold mode transferred in request, and call desk server is replied 200OK message, acknowledges receipt of this transfer-request message.
Step 3-102, call desk server initiate console client and calling subscriber's media negotiation as intermediate user, and the calling subscriber is recovered.Wherein, call desk server at first sends one not with Re-Invite (the inviting again) message of media information to the console client, and the console client is replied 200OK message, carries all medium that the console client is supported in this message.After call desk server is received, the medium of console client support are sent to the calling subscriber through Re-Invite message, the calling subscriber receives that the back carries the media information that is mated in the message of replying.
Step 3-200, caller is in and returns to form.
Step 3-201, call desk server initiate the Early media (early media) of calling subscriber and IMS equipment of the core network and consult as intermediate user.Wherein, Call desk server at first sends one not with the Re-Invite message of media information to the calling subscriber; Obtain whole media informations that caller is supported; Then this media information is sent to the IMS equipment of the core network with the form of Early media through UPDATE message, the IMS core net is replied 200OK message and is carried the ring-back tone media information, and call desk server is transmitted to the calling subscriber with the ring-back tone medium again and accomplishes media negotiation.
In addition; Also carry the media information that the console client is supported in the UPDATE message with the form of conversation media (session media); Call desk server is changed to INACTIVE with the attribute of these medium, is used to remove the console client and is connected with called subscriber's medium.
In addition, if the calling subscriber supports and needs resource reservation that the medium after call desk server also need be accomplished the caller resource reservation are redispatched to the IMS equipment of the core network, carry out early media negotiation again.
Step 3-300, caller is in the ring-back tone state of listening.
Step 3-301, called off-hook is replied, and caller this moment and callee side are not also accomplished real media negotiation, can't converse.
Step 3-302, call desk server initiate the media negotiation of calling and called as intermediate user, set up medium after consulting to accomplish and connect.Wherein, Call desk server at first sends one not with the Re-Invite message of media information to the calling subscriber; Obtain all media informations that caller is supported; Give the called subscriber with this media information through the Re-Invite forwards then, the media information that from the message that the called subscriber replys, obtains called subscriber's coupling is transmitted to the calling subscriber again, accomplishes calling subscriber and called subscriber's media negotiation.
In addition, if the calling subscriber supports and needs resource reservation that new Calling Side medium were transmitted to the called subscriber after call desk server also need be accomplished the reservation of being received, carried out media negotiation again.
Step 3-400, calling subscriber and called subscriber's medium are connected foundation, begin conversation.
Ringing state switching method among the present invention need to the caller support and need resource reservation, caller support but do not need resource reservation or caller not support resource reserve, called support and need resource reservation, called support but do not need resource reservation or called not support resource is reserved and made differentiated treatment.Calling subscriber and called subscriber can be the terminals of above any situation.
See also Fig. 4, when the calling subscriber supports and needs resource reservation, called support but when not needing resource reservation, said system realizes that the step of ringing state switching is:
Step 401～402: the console client is sent Message message to call desk server; Current caller and current the called of ringing condition that be in that is in hold mode transferred in request; Call desk server is replied 200OK message, confirms to have received this diversion message.
Step 403～404: call desk server sends one not with Re-Invite (the inviting again) message of media information to the console client, and the console client is replied 200OK message, carries all medium that the console client is supported in this message.
Step 405～406: call desk server sends Re-Invite message through the IMS equipment of the core network to caller, wherein carries the media information that the console client is supported in the step 404.
Caller is sent 183 message through the IMS equipment of the core network to call desk server, carry with 404 in the Calling Side media information that is complementary of medium.
Step 407～408: call desk server sends PRACK message through the IMS equipment of the core network to caller, and reliable Temporary Response 183 message in the step 406 are confirmed, after caller is received, replys 200OK message to call desk server.
Step 409～410: after the success of caller resource reservation, send 200OK message, arrive call desk server through the IMS equipment of the core network.After call desk server is received, reply ACK message, be sent to caller through the IMS equipment of the core network.So far, the calling subscriber is resumed.
Step 411～412: call desk server sends one through the IMS equipment of the core network to caller, and the calling subscriber replys 200OK message not with the Re-Invite message of media information, carries whole media informations that caller is supported in this message.
Step 413: call desk server sends UPDATE message to the IMS equipment of the core network, carries the media information that the console client is supported with the form of conversation media, and carries the Calling Side media information in 412 with the form of Early media.After the IMS equipment of the core network was received this message, the medium that the console client is supported passed to called through UPDATE message.The media state that call desk server sends in this step is set to INACTIVE, is used to remove the console client and is connected with called medium.
Step 414: called answer 200OK message, wherein carry the media information of callee side coupling, after the IMS equipment of the core network is received this message, the media information of ring-back tone is increased in the Early media, send to call desk server together.
Step 415: call desk server sends ACK message through the IMS equipment of the core network to caller, wherein carries the media information of ring-back tone.
Step 416: after the success of caller resource reservation, send Re-Invite message to call desk server, wherein carry the media information after caller is reserved successfully through the IMS equipment of the core network.
Step 417～418: call desk server sends UPDATE message to the IMS equipment of the core network, wherein carries the media information in the step 416 with the form of Early media.After the IMS equipment of the core network is received, reply 200OK message, wherein carry the media information of new ring-back tone.
Step 419～420: call desk server sends 200OK message through the IMS equipment of the core network to caller, wherein carries the media information in the step 418.Caller answer ACK message is confirmed, is sent to call desk server through the IMS equipment of the core network.
After above-mentioned flow process was accomplished, ring-back tone was listened in caller, and the called subscriber is in the ring attitude; But calling and called are not carried out media negotiation; This moment, calling and called can't be conversed, after called subscriber's off-hook is replied if called subscriber's off-hook is replied; The calling and called conversation can be set up, and also need after called off-hook is replied, carry out the calling and called media negotiation.
Call desk server is initiated a kind of typical case of calling and called media negotiation after below enumerating called party answer.
Fig. 5 is caller support and need resource reservation, called support but when not needing resource reservation, call desk server is initiated the process of calling and called media negotiation.
Step 501～502: call desk server sends one through the IMS equipment of the core network to the calling subscriber and after caller is received, replys 200OK message not with the Re-Invite message of media information, wherein carries whole media informations that caller is supported.
Step 503～504: call desk server sends to the called subscriber with the Calling Side medium in 502 through Re-Invite message; Called answer 200OK message, wherein carry with step 503 in the callee side media information of medium couplings, send to call desk server through the IMS equipment of the core network.
Step 505: call desk server sends ACK message through the IMS equipment of the core network to caller, wherein carries the callee side media information in the step 504.
Step 506: call desk server, is confirmed the 200OK that receives in 504 to called transmission ACK message through the IMS equipment of the core network.
Step 507～508: after the success of caller resource reservation, send the Re-Invite request to call desk server, wherein carry the Calling Side media information after reserving successfully through the IMS equipment of the core network.After call desk server is received, give the called subscriber through the Re-Invite forwards with this media information.
Step 509～510: calledly carry the media information of coupling, send to call desk server through the IMS equipment of the core network through 200OK message, after call desk server is received, with this forwards to caller.
Step 511: caller is replied ACK message the 200OK message of receiving is confirmed.
Step 512: call desk server is confirmed the 200OK message in the step 509.
So far, the calling and called media negotiation is accomplished, and gets into talking state.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with this technological people in the technical scope that the present invention disclosed; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (7)
1. ringing state switching method in the IP Multimedia System is characterized in that, comprising:
After call desk server was received the transfer-request message of console client transmission, the calling terminal that will be in hold mode recovered, and initiates the early media negotiation of calling terminal and IP Multimedia System IMS equipment of the core network then, makes calling terminal listen ring-back tone;
Behind the called end off-hook, whether said call desk server supports with whether needs resource reservation to initiate the media negotiation of calling terminal and called end according to said calling terminal and said called end, and the medium of setting up said calling terminal and said called end then are connected,
Said method is divided into following steps:
Said call desk server is replied 200OK message after receiving the transfer-request message that said console client sends; Send Re-Invite message to this console client; This console client is received back answer 200OK message, wherein carries whole media informations of its support; This call desk server sends Re-Invite message to said calling terminal, wherein carries whole media informations that the console client is supported; This calling terminal is received back answer message, wherein carries the media information of calling terminal coupling; This call desk server sends ACK message to this console client, wherein carries the media information of calling terminal coupling, and this calling terminal is resumed;
Said calling terminal is replied 200OK after receiving the Re-Invite message that said call desk server sends, and message is wherein carried whole media informations of its support; This call desk server sends UPDATE message to said IMS equipment of the core network, wherein carries the media information of calling terminal and the media information of console client; This IMS equipment of the core network is transmitted UPDATE message to said called end, wherein only carries the media information of console client; This called end is replied 200OK message, the media answer information of wherein carrying called end; This IMS equipment of the core network to this call desk server, wherein carries the ring-back tone media information with the 200OK forwards that receives; Send ACK message to calling terminal after this call desk server is received, wherein carry the ring-back tone media information, this calling terminal is listened ring-back tone after receiving message;
Behind said called end off-hook, said calling terminal is replied 200OK message after receiving the Re-Invite message that said call desk server sends, and wherein carries all media informations of its support; The media negotiation that said call desk server receives whether the back is supported according to calling terminal and called end and the needs resource reservation begins to initiate calling terminal and called end; Send Re-Invite message to this called end; Wherein carry the media information of calling terminal; And the media information after the called end coupling is sent to this calling terminal carry out media negotiation, set up this calling terminal after consulting to accomplish and be connected with the medium of this called end
Wherein, whether said call desk server supports with whether needs resource reservation to initiate the media negotiation of calling terminal and called end according to calling terminal and called end, and the medium of setting up said calling terminal and said called end then are connected, and are to accomplish in the following manner:
If said calling terminal and said called end are all supported and are needed resource reservation, after then called end is received the Re-Invite message of said call desk server transmission, reply 183 message to said call desk server, wherein carry the media information of called end coupling; After call desk server is received, send ACK message, wherein carry the media information of called end coupling to calling terminal; Calling terminal is after the resource reservation success; Send Re-Invite message to call desk server, wherein carry the calling terminal media information after the resource reservation success, after call desk server is received; Send UPDATE message to called end; Wherein carry the calling terminal media information after the resource reservation success, called end is replied 200OK message, wherein carries the media information of called end coupling; Send 200OK message to calling terminal after call desk server is received, wherein carry the media information of called end coupling; After the success of called end resource reservation, send 200OK message to call desk server, call desk server is received back answer ACK message, and the medium of setting up said calling terminal and said called end are connected;
If said calling terminal support and need resource reservation; Said called end not support resource is reserved or is supported but do not need resource reservation; After then called end is received the Re-Invite message of said call desk server transmission; Reply 200OK message to call desk server, wherein carry the media information of called end coupling; After call desk server is received, send ACK message, wherein carry the media information of called end coupling to calling terminal; Calling terminal will send Re-Invite message to call desk server after the resource reservation success; Wherein carry the calling terminal media information after the resource reservation success; After call desk server is received, send Re-Invite message, wherein carry the calling terminal media information after the resource reservation success to called end; Called end is replied 200OK message, wherein carries the media information of called end coupling; Send 200OK message to calling terminal after call desk server is received, wherein carry the media information of called end coupling; Calling terminal and called end are accomplished media negotiation, and the medium of setting up said calling terminal and said called end are connected;
If said calling terminal not support resource is reserved or is supported but do not need resource reservation; Said called end support and need resource reservation; After then called end is received the Re-Invite message of said call desk server transmission; Reply 183 message to call desk server, wherein carry the media information of called end coupling; After call desk server is received, send ACK message, wherein carry the media information of called end coupling to calling terminal; Called end finishes the back at resource reservation and sends 200OK message to call desk server; Calling terminal and called end are accomplished media negotiation, and the medium of setting up said calling terminal and said called end are connected;
If said calling terminal and said called end all not support resource reserve or all support but do not need resource reservation; After then called end is received the Re-Invite message of said call desk server transmission; Send 200OK message to call desk server, wherein carry the media information of called end coupling; After call desk server is received, send ACK message, wherein carry the media information of called end coupling to calling terminal; Calling terminal and called end are accomplished media negotiation, and the medium of setting up said calling terminal and said called end are connected.
2. ringing state switching method in the IP Multimedia System as claimed in claim 1 is characterized in that,
After said calling terminal was received the Re-Invite message of said call desk server transmission, this calling terminal was replied message, is to accomplish in the following manner:
Said calling terminal is as if supporting and need resource reservation that then this calling terminal is replied 183 message, wherein carries the media information of calling terminal coupling; Said calling terminal support but do not need resource reservation or said calling terminal not support resource reserve, this calling terminal is replied 200OK message, wherein carries the media information of calling terminal coupling.
3. ringing state switching method in the IP Multimedia System as claimed in claim 1 is characterized in that,
Said call desk server sends UPDATE message to said IMS equipment of the core network, is the media information that carries calling terminal with the form of Early media, and carries the media information of console client with the form of conversation media;
Said IMS equipment of the core network is to carry the ring-back tone media information with the form of Early media with the 200OK forwards that receives to said call desk server;
Said call desk server sends ACK message to said calling terminal after receiving the 200OK message that said IMS equipment of the core network transmits, and is to carry the ring-back tone media information with the mode of conversation media.
4. ringing state switching system in the IP Multimedia System comprises calling terminal, called end and IP Multimedia System IMS equipment of the core network, it is characterized in that,
Also comprise console client and call desk server, wherein,
Said console client is used for, and sends transfer-request message to said call desk server;
Said call desk server is used for; After receiving the transfer-request message of said console client transmission; The said calling terminal that will be in hold mode recovers, and initiates the early media negotiation of this calling terminal and said IMS equipment of the core network then, makes this calling terminal listen ring-back tone; Behind said called end off-hook, whether support needs resource reservation to initiate the media negotiation of calling terminal and called end according to said calling terminal and said called end with whether, the medium of setting up said calling terminal and said called end then are connected,
Said call desk server is that the said calling terminal that will be in hold mode in the following manner recovers:
Said call desk server is replied 200OK message after receiving the transfer-request message that said console client sends; Send Re-Invite message to this console client; Receive the 200OK message that this console client is replied, wherein carry whole media informations that the console client is supported; Send Re-Invite message to said calling terminal, wherein carry whole media informations that the console client is supported; Receive the message that calling terminal is replied, wherein carry the media information of calling terminal coupling; Send ACK message to this console client, wherein carry the media information of calling terminal coupling, this calling terminal is resumed;
Said call desk server is to make said calling terminal listen ring-back tone in the following manner:
Said call desk server sends Re-Invite message to said calling terminal, receives the 200OK message that said calling terminal is replied, and wherein carries whole media informations that calling terminal is supported; Send UPDATE message to said IMS equipment of the core network, wherein carry the media information of calling terminal and the media information of console client; Receive the 200OK message of the called end transmission of this IMS equipment of the core network forwarding, wherein carry the ring-back tone media information; Send ACK message to this calling terminal, wherein carry the ring-back tone media information, make this calling terminal listen ring-back tone;
Behind said called end off-hook, said call desk server is the media negotiation of initiating calling terminal and called end in the following manner, and the medium of setting up said calling terminal and said called end are connected:
Behind said called end off-hook, said call desk server sends Re-Invite message to said calling terminal, receives the 200OK message that this calling terminal is replied, and wherein carries all media informations that calling terminal is supported; Whether support needs resource reservation to begin to initiate the media negotiation of calling terminal and called end according to calling terminal and called end with whether; Send Re-Invite message to this called end; Wherein carry the media information of calling terminal; And the media information after the called end coupling is sent to this calling terminal carry out media negotiation, set up this calling terminal after consulting to accomplish and be connected with the medium of this called end
Wherein, whether said call desk server supports with whether needs resource reservation to initiate the media negotiation of calling terminal and called end according to calling terminal and called end, and the medium of setting up said calling terminal and said called end then are connected, and are to accomplish in the following manner:
If said calling terminal and said called end support all and need resource reservation that said call desk server receives 183 message that called end is replied after said called end sends Re-Invite message, wherein carry the media information of called end coupling; Send ACK message to calling terminal, wherein carry the media information of called end coupling; Receive the Re-Invite message that calling terminal sends in resource reservation success back, wherein carry the calling terminal media information after the resource reservation success; Send UPDATE message to called end, wherein carry the calling terminal media information after the resource reservation success; Receive the 200OK message that called end is replied, wherein carry the media information of called end coupling; Receive the 200OK message that called end sends in resource reservation success back, reply ACK message to called end, the medium of setting up said calling terminal and said called end are connected;
If said calling terminal support and need resource reservation; Said called end not support resource is reserved or is supported but do not need resource reservation; Said call desk server is after said called end sends Re-Invite message, and the 200OK message that receives the called end answer is wherein carried the media information of called end coupling; Send ACK message to calling terminal, wherein carry the media information of called end coupling; Receive the Re-Invite message that calling terminal sends in resource reservation success back, wherein carry the calling terminal media information after the resource reservation success; Send Re-Invite message to called end, wherein carry the calling terminal media information after the resource reservation success; Receive the 200OK message that called end is replied, wherein carry the media information of called end coupling; Send 200OK message to calling terminal, wherein carry the media information of called end coupling; Calling terminal and called end are accomplished media negotiation, and the medium of setting up said calling terminal and said called end are connected;
If said calling terminal not support resource is reserved or is supported but do not need resource reservation; Said called end support and need resource reservation; Said call desk server is after said called end sends Re-Invite message; Receive 183 message that called end is replied, wherein carry the media information of called end coupling; Send ACK message to calling terminal, wherein carry the media information of called end coupling; Receive called end and finish the back to the 200OK message of sending at resource reservation; Calling terminal and called end are accomplished media negotiation, and the medium of setting up said calling terminal and said called end are connected;
If said calling terminal and said called end all not support resource reserve or all support but do not need resource reservation; Said call desk server is after said called end sends Re-Invite message; Receive the 200OK message that called end is replied, wherein carry the media information of called end coupling; Send ACK message to calling terminal, wherein carry the media information of called end coupling; Calling terminal and called end are accomplished media negotiation, and the medium of setting up said calling terminal and said called end are connected.
5. ringing state switching system in the IP Multimedia System as claimed in claim 4 is characterized in that,
Said IMS equipment of the core network is used for, receive the UPDATE message that said call desk server sends after, transmit UPDATE message to said called end, wherein only carry the media information of console client; Receive this called end and reply 200OK message, the media answer information of wherein carrying called end; The 200OK forwards that receives to this call desk server, is wherein carried the ring-back tone media information.
6. ringing state switching system in the IP Multimedia System as claimed in claim 4 is characterized in that,
Said call desk server sends UPDATE message to said IMS equipment of the core network, is the media information that carries calling terminal with the form of Early media, and carries the media information of console client with the form of conversation media;
Said IMS equipment of the core network is to carry the ring-back tone media information with the form of Early media with the 200OK forwards that receives to said call desk server;
Said call desk server sends ACK message to said calling terminal after receiving the 200OK message that said IMS equipment of the core network transmits, and is to carry the ring-back tone media information with the mode of conversation media.
7. ringing state switching system in the IP Multimedia System as claimed in claim 4 is characterized in that,
After said calling terminal was received the Re-Invite message of said call desk server transmission, this calling terminal was replied message, is to accomplish in the following manner:
Said calling terminal is as if supporting and need resource reservation that then this calling terminal is replied 183 message, wherein carries the media information of calling terminal coupling; Said calling terminal support but do not need resource reservation or said calling terminal not support resource reserve, this calling terminal is replied 200OK message, wherein carries the media information of calling terminal coupling.
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| CN116320182A (en) * | 2019-10-16 | 2023-06-23 | 华为技术有限公司 | Call processing method, system and related device |
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| CN101005511A (en) * | 2007-01-17 | 2007-07-25 | 华为技术有限公司 | Method and system for reserving QoS resource and conversation establishing and revising medium method |
| CN101291328A (en) * | 2008-05-30 | 2008-10-22 | 中兴通讯股份有限公司 | Calling status switching system and switching method in IP multimedia subsystem |
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| CN101005511A (en) * | 2007-01-17 | 2007-07-25 | 华为技术有限公司 | Method and system for reserving QoS resource and conversation establishing and revising medium method |
| CN101291328A (en) * | 2008-05-30 | 2008-10-22 | 中兴通讯股份有限公司 | Calling status switching system and switching method in IP multimedia subsystem |
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