CN103428781A - IP voice call switching method, system and user equipment - Google Patents
IP voice call switching method, system and user equipment Download PDFInfo
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Abstract
The invention relates to the technical field of communication, and provides an IP voice call switching method so as to achieve the effect that a user can conduct switch in VoIP calls. The IP voice call switching method comprises the following steps: after a first VoIP call is made between first user equipment UE1 and second user equipment UE2, a first media stream A is built; when detecting that IP voice switching is needed, the UE1 sends a VoIP capacity inquiry request to a second IP network address of the UE2, and the UE2 sends back a second VoIP capacity inquiry result; the UE1 detects the second VoIP capacity inquiry result sent back by the UE2; if the UE2 supports the second VoIP capacity, a VoIP call is made in a second IP network by the UE1 and the UE2, and a second media stream B is built. The invention further provides an IP voice call switching system and the UEs.
Description
Technical field
The present invention relates to communication technique field, relate to especially a kind of ip voice conversation (Voice over IP, VoIP) changing method and system.
Background technology
Mobile voice has experienced the Multiplexing from TDM(Time-Division, time division multiplexing) after IP, the development from the conventional switch to the soft switch, will move towards the mobile broadband voice future.In network evolution, wireless side is presented as from GSM/CDMA/UMTS etc. to LTE(Long Term Evolution, Long Term Evolution) development.
At present, Britain Waduven, Japanese NTT DoCoMo, U.S. AT& The main telecom operators in the world such as T and Verizon have determined to adopt the LTE technology, and within 2009, Japan has issued 4 LTE licence plates, and the commercialization that has started LTE is prepared.In addition, China Mobile also will promote the development of LTE technology energetically, and LTE also will continue the dominant position of 2G GSM in period in the rear 3G epoch.
The distinguishing feature of LTE is high bandwidth, low time delay, always online, all-IP, QoS(Quality of Service, service quality) guarantee.Wherein QoS guarantees by system and strict QoS mechanism, guarantees the service quality of real time business (as VoIP).Therefore, at the LTE net environment, traditional CS(circuit) voice call in territory will be replaced by VoIP.
Mobile network based on following is exactly the network that all-IP covers, when the user dials voip phone under some IP-based mobile network environments, all signaling flows of this voip phone related to and Media Stream all will pass through this mobile network, purpose is that this mobile network can carry out call manager control to the user, such as charging etc.For following scene, as follows:
1, when first via IP speech quality descends, can select to be cut in the second road IP conversation, improve user's experience.Because, when the deployment of all-IP mobile network network is not yet perfect, speech quality does not likely reach the requirement of original CS voice call,
2, the first via IP conversation that the user carries out is likely the mobile network that certain operator disposes, can collect corresponding expense, if the second tunnel mobile network in the both call sides user's set can reduce user's consumer cost after just in enterprises or in certain public free WLAN zone, switching to so the second road IP conversation.
Under above-mentioned scene, the both sides that call are in the another one IP network and can dial voip phone, the user both sides that call so can by before VoIP conversation be switched in the point-to-point VoIP conversation of another one to improve speech quality or reduction expense, the IP conversation of carrying out that how to seamlessly switch to the another one IP network becomes a technical problem to be solved.
Summary of the invention
The technical problem that the present invention solves has been to provide a kind of method of ip voice conversation switching, the problem of being switched when VoIP converses to solve the user, and the present invention also provides a kind of system and subscriber equipment of ip voice conversation switching.
For addressing the above problem, the invention provides a kind of method of ip voice conversation switching, comprise,
After first user equipment UE 1 and the second user equipment (UE) 2 are set up first via voip call, set up first via Media Stream A;
Need to carry out ip voice when switching when UE1 detects, to the second road IP network address of UE2, send the request of VoIP capability query, UE2 returns to the second road VoIP capability query result;
UE1 detects the second road VoIP capability query result that UE2 returns, if UE2 supports the second road VoIP ability, UE1 and UE2 set up the VoIP conversation in the second tunnel IP network, and set up the second road Media Stream B;
UE1 and UE2 finish first via Media Stream A, after UE1 detects first via Media Stream A end, finish the first via VoIP conversation with UE2.
Further, above-mentioned method is specially,
In first via IP network, UE1 and UE2 set up the calling of VoIP, and carry the discovery that the second road IP network address completes the second IP address, road of UE1 and UE2 in the signalling interactive process of setting up first via voip call, after the first via VoIP of UE1 and UE2 conversation is set up, set up first via Media Stream A;
Need to carry out ip voice when switching when UE1 detects, to the second road IP network address of UE2, send the request of VoIP capability query, UE2 returns to the second road VoIP capability query result;
UE1 detects the second road VoIP capability query result that UE2 returns, if UE2 supports the second road VoIP ability, UE1 initiates the second road VoIP call request to the second road IP network address of UE2, UE1 and UE2 carry out the Signalling exchange of the second road VoIP conversation in the second tunnel IP network, after the second road VoIP conversation is set up, UE1 and UE2 set up the second road Media Stream B;
UE1 and UE2 finish first via Media Stream A, after UE1 detects first via Media Stream A end, finish the first via VoIP conversation with UE2.
Above-mentioned method, in first via IP network, UE1 and UE2 set up the calling of VoIP, and the IP network address that carries the second tunnel in the signalling interactive process of setting up first via voip call completes the discovery of the second road IP network address of UE1 and UE2, after the first via VoIP of UE1 and UE2 conversation is set up, setting up first via Media Stream A is specially
UE1 initiates a session request to UE2, and this initiates a session request and comprises the address of UE1 in the second tunnel IP network;
UE2 resolves initiating a session request of receiving, preserves the address of UE1 in the second tunnel IP network;
UE2 structure ring response is added the address of UE2 in the second tunnel IP network in described ring response, and described ring response is sent to UE1;
UE1 resolves the described ring response of receiving, extracts and preserve the address of UE2 in the second tunnel IP network;
UE2 answers the call request that UE1 initiates, and sends request response to UE1;
After UE1 receives the described request response, transmission confirms to reply UE2;
The first via Media Stream A that UE1, UE2 transmit by RTP.
Above-mentioned method, wherein, describedly need to carry out ip voice when switching when UE1 detects, and to the second road IP network address of UE2, sends the request of VoIP capability query, and UE2 returns to the second road VoIP capability query result and is specially,
UE1 is to UE2 address initiating capacity inquiry request in the second tunnel IP network;
After UE2 receives the described capability query request of UE1 initiation, send UE2 to UE1 and support the VoIP of the second tunnel IP network to reply, UE2 is replying to the UE1 capability query request that initiate address in the second tunnel IP network herein.
Above-mentioned method, wherein, described UE1 detects the second road VoIP capability query result that UE2 returns, if UE2 supports the second road VoIP ability, UE1 initiates the second road VoIP call request to the second road IP network address of UE2, and UE1 and UE2 carry out the Signalling exchange of the second road VoIP conversation in the second tunnel IP network, after the second road VoIP conversation is set up, UE1 and UE2 set up the second road Media Stream B and are specially
UE1 confirmation UE2 is supported in the second tunnel IP network and carries out VoIP, to UE2, in the second tunnel IP network, initiates a session request address;
After UE2 receives described initiating a session request, to UE1 address in the second tunnel IP network, send the ring response;
UE2 sends to answer to UE1 address in the second tunnel IP network and replys;
UE1 sends to UE2 address in the second tunnel IP network for described and answers the response of replying;
UE1 and UE2 set up the second road Media Stream B.
Above-mentioned method, wherein, described UE1 and UE2 finish first via Media Stream A, after UE1 detects first via Media Stream A end, finish to be specially with the first via VoIP conversation of UE2,
UE1 and UE2 send respectively the termination request of first via VoIP conversation to TAS;
TAS sends the response to described termination request to UE1 and UE2 respectively, finishes first via VoIP conversation.
The present invention also provides first user equipment, and described first user equipment UE 1, for after setting up first via voip call with the second user equipment (UE) 2, is set up first via Media Stream A; And need to carry out ip voice when switching for detecting as UE1, send the request of VoIP capability query to the second road IP network address of UE2; And the second road VoIP capability query result of returning for detection of UE2, if UE2 supports the second road VoIP ability, and UE2 sets up VoIP conversation in the second tunnel IP network, and sets up the second road Media Stream B; And, for UE2, finishing first via Media Stream A, after UE1 detects first via Media Stream A end, finish the first via VoIP conversation with UE2.
Further, above-mentioned first user equipment, specifically comprise,
UE1 signaling control module, for constructing the initial message that initiates a session request, import UE1 voice handover module into; And for adding UE1 to send to UE2 at the message that initiates a session request of the address of the second tunnel IP network; For after receiving the ring response message of UE2, import this response into UE1 voice handover module; For after receiving the request response that UE2 sends, send and confirm to reply to UE2; The voice handover module is imported in request response for the capability query request by receiving into;
Whether UE1 voice handover module, for needing switching by UE1 user configuration module inquiring user; And need switching for judge the user according to Query Result, insert the address of UE1 in the second tunnel IP network in the message that initiates a session request, and return to the signaling control module; Preserve the address of UE2 in the second tunnel IP network in the ring response; For the second road IP access address transmitting capacity inquiry request of the UE2 that preserves wherein by the signaling control module, whether inquiry UE2 accepts the voip call request on the second IP address, road; For by UE1 signaling control module, initiating initiating a session request to UE2 the second road IP access address;
The UE1 user configuration module, for returning to Query Result to UE1 voice handover module;
The UE1 media management module, for setting up the second road Media Stream B, close first via Media Stream A, and the information reporting that media are closed is to UE1 signaling control module.
The present invention also provides the second subscriber equipment, and described the second user equipment (UE) 2, for after setting up first via voip call with first user equipment UE 2, is set up first via Media Stream A; Return to the second road VoIP capability query result for 2; And for UE1, in the second tunnel IP network, setting up the VoIP conversation, and set up the second road Media Stream B; And for UE1, finishing first via Media Stream A.
Further, the second above-mentioned subscriber equipment, specifically comprise,
UE2 signaling control module, for receiving the message that initiates a session request of UE1, structure ring response message, import the ring response message that initiates a session request and construct of UE1 into UE2 voice handover module in the lump; For to UE1, sending and answer response message; While for UE2, on the second tunnel IP network, supporting the VoIP business, after receiving the capability query request of UE1, reply the request response; For after receiving and initiating a session request, to UE1 address in the second tunnel IP network, send the ring response; For sending to answer in the second IP network address, tunnel to UE1, reply;
UE2 voice handover module, for the parsing message that initiates a session request, preserve UE1 in the address of the second tunnel IP network, and the address of inserting the second tunnel IP network of UE2 in response message, and the corresponding message that will revise returns to UE1 voice handover module;
The UE2 media management module, for setting up the second road Media Stream B, close first via audio medium stream, and the information reporting that media are closed is to UE2 signaling control module.
The present invention also provides a kind of system of ip voice conversation switching, comprises,
Described first user equipment UE 1, for after setting up first via voip call with the second user equipment (UE) 2, is set up first via Media Stream A; And need to carry out ip voice when switching for detecting as UE1, send the request of VoIP capability query to the second road IP network address of UE2; And the second road VoIP capability query result of returning for detection of UE2, if UE2 supports the second road VoIP ability, and UE2 sets up VoIP conversation in the second tunnel IP network, and sets up the second road Media Stream B; And, for UE2, finishing first via Media Stream A, after UE1 detects first via Media Stream A end, finish the first via VoIP conversation with UE2;
Described the second user equipment (UE) 2, for after setting up first via voip call with first user equipment UE 2, is set up first via Media Stream A; For returning to the second road VoIP capability query result; And for UE1, in the second tunnel IP network, setting up the VoIP conversation, and set up the second road Media Stream B; And for UE1, finishing first via Media Stream A.
Adopt technical scheme of the present invention, the both sides that call are in the another one IP network and can dial voip phone, and the user both sides that call so can seamlessly switch to VoIP conversation before in the point-to-point VoIP conversation of another one to improve speech quality or reduction expense.
The accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a part of the present invention, and schematic description and description of the present invention the present invention does not form inappropriate limitation of the present invention for explaining.In the accompanying drawings:
Fig. 1 is the first embodiment of the invention flow chart;
Fig. 2 is the second embodiment of the invention flow chart;
Fig. 3 is the third embodiment of the invention structure chart.
Embodiment
In order to make technical problem to be solved by this invention, technical scheme and beneficial effect clearer, clear, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
In an embodiment of the present invention, UE means user equipment(subscriber equipment), TAS means Telephony Application Server(telco application server).TAS is a logic entity, wherein may comprise a plurality of network equipments, and for example, in actual network design, it can be IMS(IP Multimedia system) core net.In a word, it has represented the mobile IP network that some operators dispose, and the user can dial VoIP in this network, and TAS can manage to VoIP (for example charging etc.).
In enforcement of the present invention, the signaling process carried out through TAS between UE, the flow process between UE1 and UE2 is forwarded through TAS, and therefore, UE1 is not transparent transmission to transfer process such as UE2 transmission message or UE2 return messages in an embodiment.
As shown in Figure 1, be the first embodiment of the invention flow chart, the method for a kind of ip voice conversation switching is provided, its application scenarios is, and UE1 and UE2 obtain the access of two-way IP network simultaneously, and it is WLAN (wireless local area network) that a road access way is wherein arranged.Specifically comprise,
Step S101, UE1 and UE2 set up the calling of VoIP based on TAS;
Wherein TAS VoIP means the VoIP based on TAS, and UE1 and UE2 by with TAS, carrying out signaling (signal) alternately, set up (set up) conversation relation respectively.Because all signaling signal that set up dialogue relation will pass through TAS, so TAS can know and control the talking state of UE1 and UE2.
Step S102, after the conversation relation of UE1 and UE2 is set up, start to set up the transmission channel of Media Stream (media stream) A;
Because TAS in step S101 has participated in the signaling process that UE1 and UE2 set up the conversation relation, transmission for management of media stream, TAS has served as the role of media terminals, so the media in media stream A are not the transparent transmission between UE1 and UE2 but are forwarded via TAS.
Step S103, need to carry out ip voice when switching when UE1 detects, and to UE2, sends second a road VoIP capability query request (AltVoIP Cap query);
Step S104, UE2 returns to AltVoIP Cap Query Result (answer);
Step S105, UE1 detects the Query Result of UE2, if UE2 supports AltVoIP, the second road VoIP of UE1 initiation and UE2 sets up conversation relation (AltVoIP signal set up) so;
Step S106, after the second road VoIP conversation relation is set up, UE1 and UE2 set up the second road Media Stream Media Stream B;
Step S107, after Media Stream B is successfully established, UE1 and UE2 finish (tear down) Media Stream A;
Step S108, after UE1 detects Media Stream A end, finish the first via (TASVoIP) the IP conversation relation of setting up with UE2.
In practical implementation, UE1 sends signaling to TAS, by TAS, again signaling is transmitted to UE2.
As supplementing of embodiment mono-, also having an additional application scene is that one of above-mentioned basic scene is supplemented, be specially,
In the situation that UE1 or UE2 only have a road IP network access, UE1 and UE2 carry out the voip call based on TAS.When UE1 or UE2 have entered the WLAN zone, while having obtained the second tunnel IP network access based on WLAN, UE1(this to sentence UE1 be example, UE2 is equally applicable) the VoIP client IP address that UE1 has accessed WLAN (wireless local area network) and obtained the second road IP access detected, the VoIP client of UE1 can be initiated renegotiation request in the first via IP based on TAS calls out so, can carry the IP address of the second road IP access of UE1 in this request.UE2 can provide response after receiving this request, can carry the address of UE2 the second road IP access in response, and the later flow process of the follow-up flow process of heavily having consulted and basic scheme step 3 and step 3 is identical.
As shown in Figure 2, it is the second embodiment of the invention flow chart, a kind of method of ip voice conversation switching is provided, adopt SIP(Session Initiation Protocol in present embodiment, the signaling initiation protocol) carry out signaling communication, adopt RTP(Real-time Transport Protocol) carry out media flow transmission.Specifically comprise,
Step S201, UE1 initiates sip invite and asks TAS, adds Alert-Info field in this request, the value of Alert-Info is: " alt-addr "<XXX >.Wherein XXX means the address of UE1 in the second tunnel IP network; TAS is transmitted to UE2 after receiving sip invite request; UE2 resolves the sip invite request of receiving, finding has " alt-addr " in Alert-Info, means that UE1 need to do switching, and the XXX(that UE2 preserves wherein is the address of UE1 in the second tunnel IP network) value;
Step S202, UE2 structure ring response (sip:180), because UE2 knows that by the Alert-Info obtained in step S201 UE1 likely needs to initiate switching, so UE2 adds the Alert-Info field in sip:180, the value of Alert-Info is: " alt-addr "<XXX >.Wherein XXX means the address of UE2 in the second tunnel IP network.UE2 sends to TAS by sip:180, and TAS is transmitted to UE1.UE1 resolve receive 180 in comprise Altert-Info and " alt-addr " arranged, mean<in be the address of UE2 in the second tunnel IP network; UE1 extracts and preserves this address;
Step S203, UE2 answers the call request that UE1 initiates, and sends sip:200ok to TAS, and TAS is forwarded to UE1 by SIP:200ok;
Step S204, UE1 receive after 200ok send to 200ok reply sip:ack to TAS, TAS is transmitted to UE2 by sip:ack;
Step S205, UE1, UE2 have set up with TAS the voice flow (media stream A) transmitted by RTP respectively;
Step S206, UE1 initiates the sip:options request to UE2, the initiating capacity inquiry; Here UE1 is to the UE2 obtained in the step b capability query request that initiate address in the second tunnel IP network;
Step S207, UE2 sends and replys (sip:200ok) to UE1 after receiving the sip:options request of UE1 initiation, expresses support for the VoIP of the second tunnel IP network.Here UE2 replys to the UE1 obtained in the step S201 capability query that initiate address in the second tunnel IP network.
Step S208, UE1 receives that replying rear discovery UE2 is supported in the second tunnel IP network and carries out VoIP.UE1 sends the sip:invite request to UE2, and UE1 is to the UE2 obtained in the step S202 sip:invite that initiate address in the second tunnel IP network request here.
Step S209, after UE2 receives sip:invite, send ring response (sip:180) to UE1.Here UE2 is to the UE1 obtained in the step a ring that initiate address in the second tunnel IP network response.
Step S210, UE2 sends to answer to UE1 and replys (sip:200ok).Here UE2 is that answering that initiate address in the second tunnel IP network to the UE1 obtained in step S201 replied;
Step S211, UE1 sends the sip:ack for sip:200ok to UE2.Here UE1 is to the UE2 obtained in the step b sip:ack that address sends in the second tunnel IP network request.
Step S212, UE1 and UE2 the second road audio stream transmission channel (media stream B) are set up.
Step S213, UE1 and UE2 stop the transmission of media stream A.
Step S214, UE1 and UE2 send to TAS the request (sip:bye) that stops first via VoIP conversation respectively;
Step S215, TAS sends corresponding (sip:200ok) end first via voip call to sip:bye to UE1 and UE2 respectively.
In supplementary scene as the second embodiment, take UE1 as example, after UE1 detects the WLAN access, initiate renegotiation request, it is SIP INVITE request that this request is implemented scene step S201 consistent with basic scheme, wherein Alert-Info field carried in this request, and field contents is " alt-addr "<XXX >, wherein XXX means the IP address of the WLAN access of UE1.UE2 replys 200ok after receiving this request, if UE2 also has the WLAN access, carries so Alert-Info field in 200ok, and field contents is " alt-addr "<XXX >, wherein XXX means the IP address of the WLAN access of UE2.UE1 and UE2 have obtained the IP address of WLAN separately by the heavy negotiation mechanism of SIP session like this, and so follow-up calling switching flow and the switching execution mode of basic scheme are consistent.
As shown in Figure 3, be the third embodiment of the invention structure chart, a kind of ip voice conversation switched system is provided, comprise UE1 and UE2, wherein,
UE1, in first via IP network, and UE2 sets up the calling of VoIP, detects its address in the second tunnel IP network and sends to UE2 to preserve, and after the first via VoIP of UE1 and UE2 conversation is set up, with TAS, sets up the transmission channel of Media Stream A; In the time of need to carrying out the ip voice switching for detecting as UE1, to UE2, send the second road VoIP capability query request; UE1 detects the second road VoIP capability query result that UE2 returns, if UE2 supports the second road VoIP ability, UE1 initiates to set up the conversation relation with the second road VoIP of UE2, and after the second road VoIP conversation is set up, UE1 and TAS set up the second road Media Stream B; And, for finishing first via Media Stream A, after first via Media Stream A end being detected, finish the first via VoIP conversation with UE2;
UE2, in first via IP network, and UE1 sets up the calling of VoIP, detects its address in the second tunnel IP network and sends to UE1 to preserve, and after the first via VoIP of UE1 and UE2 conversation is set up, with TAS, sets up the transmission channel of Media Stream A; Return to the second road VoIP capability query result for UE2; After the second road VoIP conversation is set up, UE2 and TAS set up the second road Media Stream B; For finishing first via Media Stream A.
Particularly,
UE1 signaling control module, for constructing initial sip:invite message, import UE1 voice handover module into; And send to UE2 for the sip:invite message that will add Alert-Info field;
Whether UE1 voice handover module, for needing switching by UE1 user configuration module inquiring user; And need switching for judge the user according to Query Result, insert Alert-Info field in the sip:invite message, and return to the signaling control module;
The UE1 user configuration module, for returning to Query Result;
UE2 signaling control module, for receiving the sip:invite message of UE1, structure ring 180 response messages, import the sip:invite of UE1 into UE2 voice handover module in the lump with the 180 corresponding messages of having constructed.
UE2 voice handover module, for resolving the sip:invite message, find that there is the Alert-info field, it resolves the value of this field, find that there is " alt-addr " prefix, mean that UE1 may need switching, it preserves the address (value of Alet-info in sip:invite) of the second road IP access of UE1, and insert the Alert-info field in 180 response messages, its value assignment is become to the second road IP access address of UE2, and the 180 corresponding messages that will revise return to UE1 voice handover module;
UE1 signaling control module, after 180 message response of receiving UE2, import this response into UE1 voice handover module, and the voice handover module is preserved the second road IP access address of UE2 in Alert-info in 180.
UE2 signaling control module, for sending 200ok message to UE1;
UE1 signaling control module, for after receiving the 200ok response that UE2 sends, send ACK and confirmed, and this ACK is imported into to UE1 voice handover module simultaneously;
UE1 voice handover module, send the sip:options request for the second road IP access address of the UE2 that preserves wherein by the signaling control module, and whether inquiry UE2 accepts the voip call request on the second IP address, road.
UE2 signaling control module, while for UE2, in the second road IP access, supporting the VoIP business, after receiving the sip:options request of UE1, reply 200ok at once,
UE1 signaling control module, import the voice handover module into for the 200ok response of the sip:options by receiving,
UE1 voice handover module is initiated the voice call request (sip:invite) to UE2 the second road IP access address by UE1 signaling control module.
The media management module of UE1 and UE2 is closed first via audio medium stream, and the information reporting that media are closed is given signaling control module separately.The signaling control module of UE1 and UE2 completes and finishes first via voip call.
Above-mentioned explanation illustrates and has described the preferred embodiments of the present invention, but as previously mentioned, be to be understood that the present invention is not limited to the disclosed form of this paper, should not regard the eliminating to other embodiment as, and can be used for various other combinations, modification and environment, and can, in invention contemplated scope described herein, by technology or the knowledge of above-mentioned instruction or association area, be changed.And the change that those skilled in the art carry out and variation do not break away from the spirit and scope of the present invention, all should be in the protection range of claims of the present invention.
Claims (11)
1. the method for an ip voice conversation switching, is characterized in that, comprise,
After first user equipment UE 1 and the second user equipment (UE) 2 are set up first via voip call, set up first via Media Stream A;
Need to carry out ip voice when switching when UE1 detects, to the second road IP network address of UE2, send the request of VoIP capability query, UE2 returns to the second road VoIP capability query result;
UE1 detects the second road VoIP capability query result that UE2 returns, if UE2 supports the second road VoIP ability, UE1 and UE2 set up the VoIP conversation in the second tunnel IP network, and set up the second road Media Stream B;
UE1 and UE2 finish first via Media Stream A, after UE1 detects first via Media Stream A end, finish the first via VoIP conversation with UE2.
2. method according to claim 1, is characterized in that, be specially,
In first via IP network, UE1 and UE2 set up the calling of VoIP, and carry the discovery that the second road IP network address completes the second IP address, road of UE1 and UE2 in the signalling interactive process of setting up first via voip call, after the first via VoIP of UE1 and UE2 conversation is set up, set up first via Media Stream A;
Need to carry out ip voice when switching when UE1 detects, to the second road IP network address of UE2, send the request of VoIP capability query, UE2 returns to the second road VoIP capability query result;
UE1 detects the second road VoIP capability query result that UE2 returns, if UE2 supports the second road VoIP ability, UE1 initiates the second road VoIP call request to the second road IP network address of UE2, UE1 and UE2 carry out the Signalling exchange of the second road VoIP conversation in the second tunnel IP network, after the second road VoIP conversation is set up, UE1 and UE2 set up the second road Media Stream B;
UE1 and UE2 finish first via Media Stream A, after UE1 detects first via Media Stream A end, finish the first via VoIP conversation with UE2.
3. method according to claim 2, it is characterized in that, in first via IP network, UE1 and UE2 set up the calling of VoIP, and the IP network address that carries the second tunnel in the signalling interactive process of setting up first via voip call completes the discovery of the second road IP network address of UE1 and UE2, after the first via VoIP of UE1 and UE2 conversation is set up, set up first via Media Stream A and be specially
UE1 initiates a session request to UE2, and this initiates a session request and comprises the address of UE1 in the second tunnel IP network;
UE2 resolves initiating a session request of receiving, preserves the address of UE1 in the second tunnel IP network;
UE2 structure ring response is added the address of UE2 in the second tunnel IP network in described ring response, and described ring response is sent to UE1;
UE1 resolves the described ring response of receiving, extracts and preserve the address of UE2 in the second tunnel IP network;
UE2 answers the call request that UE1 initiates, and sends request response to UE1;
After UE1 receives the described request response, transmission confirms to reply UE2;
The first via Media Stream A that UE1, UE2 transmit by RTP.
4. method according to claim 3, is characterized in that, describedly when UE1 detects, need to carry out ip voice when switching, to the second road IP network address of UE2, sends the request of VoIP capability query, and UE2 returns to the second road VoIP capability query result and is specially,
UE1 is to UE2 address initiating capacity inquiry request in the second tunnel IP network;
After UE2 receives the described capability query request of UE1 initiation, send UE2 to UE1 and support the VoIP of the second tunnel IP network to reply, UE2 is replying to the UE1 capability query request that initiate address in the second tunnel IP network herein.
5. method according to claim 4, it is characterized in that, described UE1 detects the second road VoIP capability query result that UE2 returns, if UE2 supports the second road VoIP ability, UE1 initiates the second road VoIP call request to the second road IP network address of UE2, and UE1 and UE2 carry out the Signalling exchange of the second road VoIP conversation in the second tunnel IP network, after the second road VoIP conversation is set up, UE1 and UE2 set up the second road Media Stream B and are specially
UE1 confirmation UE2 is supported in the second tunnel IP network and carries out VoIP, to UE2, in the second tunnel IP network, initiates a session request address;
After UE2 receives described initiating a session request, to UE1 address in the second tunnel IP network, send the ring response;
UE2 sends to answer to UE1 address in the second tunnel IP network and replys;
UE1 sends to UE2 address in the second tunnel IP network for described and answers the response of replying;
UE1 and UE2 set up the second road Media Stream B.
6. method according to claim 5, is characterized in that, described UE1 and UE2 finish first via Media Stream A, after UE1 detects first via Media Stream A end, finish to be specially with the first via VoIP conversation of UE2,
UE1 and UE2 send respectively the termination request of first via VoIP conversation to TAS;
TAS sends the response to described termination request to UE1 and UE2 respectively, finishes first via VoIP conversation.
7. first user equipment, is characterized in that, described first user equipment UE 1, for after setting up first via voip call with the second user equipment (UE) 2, is set up first via Media Stream A; And need to carry out ip voice when switching for detecting as UE1, send the request of VoIP capability query to the second road IP network address of UE2; And the second road VoIP capability query result of returning for detection of UE2, if UE2 supports the second road VoIP ability, and UE2 sets up VoIP conversation in the second tunnel IP network, and sets up the second road Media Stream B; And, for UE2, finishing first via Media Stream A, after UE1 detects first via Media Stream A end, finish the first via VoIP conversation with UE2.
8. first user equipment according to claim 7, is characterized in that, specifically comprise,
UE1 signaling control module, for constructing the initial message that initiates a session request, import UE1 voice handover module into; And for adding UE1 to send to UE2 at the message that initiates a session request of the address of the second tunnel IP network; For after receiving the ring response message of UE2, import this response into UE1 voice handover module; For after receiving the request response that UE2 sends, send and confirm to reply to UE2; The voice handover module is imported in request response for the capability query request by receiving into;
Whether UE1 voice handover module, for needing switching by UE1 user configuration module inquiring user; And need switching for judge the user according to Query Result, insert the address of UE1 in the second tunnel IP network in the message that initiates a session request, and return to the signaling control module; Preserve the address of UE2 in the second tunnel IP network in the ring response; For the second road IP access address transmitting capacity inquiry request of the UE2 that preserves wherein by the signaling control module, whether inquiry UE2 accepts the voip call request on the second IP address, road; For by UE1 signaling control module, initiating initiating a session request to UE2 the second road IP access address;
The UE1 user configuration module, for returning to Query Result to UE1 voice handover module;
The UE1 media management module, for setting up the second road Media Stream B, close first via Media Stream A, and the information reporting that media are closed is to UE1 signaling control module.
9. the second subscriber equipment, is characterized in that, described the second user equipment (UE) 2, for after setting up first via voip call with first user equipment UE 2, is set up first via Media Stream A; Return to the second road VoIP capability query result for 2; And for UE1, in the second tunnel IP network, setting up the VoIP conversation, and set up the second road Media Stream B; And for UE1, finishing first via Media Stream A.
10. the second subscriber equipment according to claim 9, is characterized in that, specifically comprise,
UE2 signaling control module, for receiving the message that initiates a session request of UE1, structure ring response message, import the ring response message that initiates a session request and construct of UE1 into UE2 voice handover module in the lump; For to UE1, sending and answer response message; While for UE2, on the second tunnel IP network, supporting the VoIP business, after receiving the capability query request of UE1, reply the request response; For after receiving and initiating a session request, to UE1 address in the second tunnel IP network, send the ring response; For sending to answer in the second IP network address, tunnel to UE1, reply;
UE2 voice handover module, for the parsing message that initiates a session request, preserve UE1 in the address of the second tunnel IP network, and the address of inserting the second tunnel IP network of UE2 in response message, and the corresponding message that will revise returns to UE1 voice handover module;
The UE2 media management module, for setting up the second road Media Stream B, close first via audio medium stream, and the information reporting that media are closed is to UE2 signaling control module.
11. the system of an ip voice conversation switching, is characterized in that, comprises,
Described first user equipment UE 1, for after setting up first via voip call with the second user equipment (UE) 2, is set up first via Media Stream A; And need to carry out ip voice when switching for detecting as UE1, send the request of VoIP capability query to the second road IP network address of UE2; And the second road VoIP capability query result of returning for detection of UE2, if UE2 supports the second road VoIP ability, and UE2 sets up VoIP conversation in the second tunnel IP network, and sets up the second road Media Stream B; And, for UE2, finishing first via Media Stream A, after UE1 detects first via Media Stream A end, finish the first via VoIP conversation with UE2;
Described the second user equipment (UE) 2, for after setting up first via voip call with first user equipment UE 2, is set up first via Media Stream A; For returning to the second road VoIP capability query result; And for UE1, in the second tunnel IP network, setting up the VoIP conversation, and set up the second road Media Stream B; And for UE1, finishing first via Media Stream A.
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