CN103428781B - A kind of method and system of IP voice call switching, user equipment - Google Patents
A kind of method and system of IP voice call switching, user equipment Download PDFInfo
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Abstract
The present invention relates to communication technique field, a kind of method of IP voice call switching is provided, to solve the problems, such as that user switches over when VoIP converses, including, after first user equipment (UE) 1 and second user equipment UE 2 establish first via voip call, first via Media Stream A is established；When UE1, which is detected, needs to carry out ip voice switching, the request of VoIP capability queries is sent to UE2 the second road IP network address, UE2 returns to the second road VoIP capability query results；The second road VoIP capability query results that UE1 detections UE2 is returned, if UE2 supports the second road VoIP abilities, UE1 and UE2 establish VoIP calls in the second road IP network, and establish the second road Media Stream B.Present invention also offers the system and user equipment of a kind of IP voice call switching.
Description
Technical field
The present invention relates to communication technique field, particularly a kind of IP voice call (Voice over IP, VoIP) is cut
Change method and system.
Background technology
Mobile voice experienced to be handed over from TDM (Time-Division Multiplexing, time division multiplexing) to IP, from tradition
Change planes to after the development of soft switch, future will move towards mobile broadband voice.On e-learning quality, wireless side is presented as from GSM/
CDMA/UMTS etc. develops to LTE (Long Term Evolution, Long Term Evolution).
At present, the main telecom operation in the world such as Waduven of Britain, Japanese NTT DoCoMo, the U.S. AT＆T and Verizon
Business determined to use LTE technologies, and Japan in 2009 has issued 4 LTE licence plates, has started LTE commercial preparation.In in addition,
State's movement will also promote the development of LTE technologies energetically, and LTE will also continue 2G periods GSM dominant position in the rear 3G epoch.
LTE distinguishing feature is high bandwidth, low time delay, always online, full IP, QoS (Quality of Service, clothes
Business quality) ensure.Wherein QoS guarantee ensures the service of real time business (such as VoIP) by system design and strict QoS mechanism
Quality.Therefore, under LTE network environment, the voice call in traditional CS (circuit) domain will be substituted by VoIP.
Mobile network based on future is exactly the network of full IP coverings, when user is in some IP-based mobile network's ring
Voip phone is dialed under border, all signaling flows and Media Stream of the voip phone being related to will pass through the mobile network, mesh
Be the mobile network can to user carry out call manager control, such as charging etc..It is as follows for following scene：
1st, when first via IP speech qualities decline, it can select to be cut into the second road IP calls, improve user
Experience.Because when AII-IP mobile network deployment is not perfect enough, speech quality is possible to not reach original CS voice calls
Requirement,
2nd, the first via IP calls that user is carried out are likely to be the mobile network of some operator deployment, can collect corresponding
Expense, in enterprises or public free at some if the second tunnel mobile network in both call sides user's set
In WLAN regions, then the consumer cost of user can be reduced by switching to after the second road IP converses.
Under above-mentioned scene, the both sides that call are in another IP network and can dial voip phone, that
VoIP calls before can be switched in another point-to-point VoIP call to carry by the user both sides called
High speech quality reduces expense, and the carry out IP calls for how seamlessly switching to another IP network are to be solved as one
Technical problem.
The content of the invention
Present invention solves the technical problem that being the provision of a kind of method of IP voice call switching, existed with solving user
The problem of VoIP is switched over when conversing, present invention also offers the system and user equipment of a kind of IP voice call switching.
To solve the above problems, the invention provides a kind of method of IP voice call switching, including,
After first user equipment (UE) 1 and second user equipment UE 2 establish first via voip call, first via Media Stream is established
A；
When UE1, which is detected, needs to carry out ip voice switching, send VoIP abilities to UE2 the second road IP network address and look into
Request is ask, UE2 returns to the second road VoIP capability query results；
UE1 detection UE2 return the second road VoIP capability query results, if UE2 support the second road VoIP abilities, UE1 and
UE2 establishes VoIP calls in the second road IP network, and establishes the second road Media Stream B；
UE1 and UE2 terminates first via Media Stream A, after UE1 detects that first via Media Stream A terminates, terminates with UE2's
First via VoIP converses.
Further, above-mentioned method specifically,
In first via IP network, UE1 and UE2 establish VoIP calling, and in the signaling for establishing first via voip call
The discovery that the second road IP network address completes UE1 and UE2 the second tunnel IP address is carried in interaction, the of UE1 and UE2
After VoIP calls are established all the way, first via Media Stream A is established；
When UE1, which is detected, needs to carry out ip voice switching, send VoIP abilities to UE2 the second road IP network address and look into
Request is ask, UE2 returns to the second road VoIP capability query results；
UE1 detection UE2 return the second road VoIP capability query results, if UE2 support the second road VoIP abilities, UE1 to
UE2 the second road IP network address initiates the second road VoIP call requests, and UE1 and UE2 carry out second in the second road IP network
The Signalling exchange of road VoIP calls, after the second road VoIP calls are established, UE1 and UE2 establish the second road Media Stream B；
UE1 and UE2 terminates first via Media Stream A, after UE1 detects that first via Media Stream A terminates, terminates with UE2's
First via VoIP converses.
Above-mentioned method, in first via IP network, UE1 and UE2 establish VoIP calling, and are establishing first via VoIP
The hair of the IP network address completion UE1 and UE2 on the second tunnel the second road IP network address is carried in the signalling interactive process of calling
It is existing, after UE1 and UE2 first via VoIP calls are established, establish first via Media Stream A specifically,
UE1 initiates a session request to UE2, and this initiates a session request including UE1 the address in the second road IP network；
What UE2 parsings received initiates a session request, and preserves addresses of the UE1 in the second road IP network；
UE2 construction ring responses, add addresses of the UE2 in the second road IP network, by described in ring response
Ring response is sent to UE1；
The ring response that UE1 parsings receive, extracts and preserves addresses of the UE2 in the second road IP network；
UE2 answers the call request of UE1 initiations, sends request and is responsive to UE1；
UE1 sends confirmation response to UE2 after receiving the request response；
The first via Media Stream A that UE1, UE2 are transmitted by RTP.
Above-mentioned method, wherein, it is described when UE1 detect need carry out ip voice switching when, to UE2 the second road IP network
Network address sends the request of VoIP capability queries, UE2 return to the second road VoIP capability queries result specifically,
UE1 address initiating capacity inquiry requests in the second road IP network to UE2；
After UE2 receives the capability query request of UE1 initiations, send UE2 to UE1 and support the second road IP network
VoIP responses, UE2 is the response asked to the UE1 capability queries that address is initiated in the second road IP network herein.
Above-mentioned method, wherein, the second road VoIP capability query results that the UE1 detections UE2 is returned, if UE2 is supported
Second road VoIP abilities, UE1 initiate the second road VoIP call requests, UE1 and UE2 the to UE2 the second road IP network address
The Signalling exchange of the second road VoIP calls is carried out in two road IP networks, after the second road VoIP calls are established, UE1 and UE2
Establish the second road Media Stream B specifically,
UE1 confirms that UE2 supports to carry out VoIP in the second road IP network, and to UE2, address is sent in the second road IP network
Initiate a session request；
UE2 receives described after initiating a session request, and to UE1, address sends ring response in the second road IP network；
To UE1, response is answered in the address transmission in the second road IP network to UE2；
To UE2, the address in the second road IP network is sent for the response for answering response UE1；
UE1 and UE2 establishes the second road Media Stream B.
Above-mentioned method, wherein, the UE1 and UE2 terminate first via Media Stream A, when UE1 detects first via Media Stream
After A terminates, terminate with UE2 first via VoIP call specifically,
The termination that UE1 and UE2 sends first via VoIP calls to TAS respectively is asked；
TAS is sent to the response for terminating request to UE1 and UE2 respectively, terminates first via VoIP calls.
Present invention also offers the first user equipment, first user equipment (UE) 1 is used for and second user equipment UE 2 is built
After vertical first via voip call, first via Media Stream A is established；And for when UE1 detect need carry out ip voice switching when,
The request of VoIP capability queries is sent to UE2 the second road IP network address；And for detecting the second road VoIP energy of UE2 returns
Power Query Result, if UE2 supports the second road VoIP abilities, and UE2 to establish VoIP calls in the second road IP network, and establish the
Two road Media Stream B；And for terminating first via Media Stream A with UE2, after UE1 detects that first via Media Stream A terminates, knot
Beam and UE2 first via VoIP converse.
Further, the first above-mentioned user equipment, is specifically included,
UE1 signaling control modules, for constructing the initial message that initiates a session request, it is passed to UE1 voice handover modules；With
And for the message that initiates a session request for adding addresses of the UE1 in the second road IP network to be sent into UE2；For receiving UE2
Ring response message after, the response is passed to UE1 voice handover modules；For after the request response of UE2 transmissions is received, sending out
Send and confirm response to UE2；For the incoming voice handover module of request response for asking the capability query received；
UE1 voice handover modules, for inquiring about whether user needs to switch by UE1 user configuration modules；And it is used for
Judge that user needs to switch according to Query Result, UE1 is inserted in the message that initiates a session request in the second road IP network
Address, and return to signaling control module；Preserve addresses of the UE2 in the second road IP network in ring response；For passing through letter
The second road IP access address transmitting capacity inquiry requests for the UE2 that control module preserves thereto are made, whether UE2 is second for inquiry
Receive voip call request in the IP address of road；For being initiated by UE1 signaling control modules to the second roads of UE2 IP access addresses
Initiate a session request；
UE1 user configuration modules, for returning to Query Result to UE1 voices handover module；
UE1 media management modules, for establishing the second road Media Stream B, first via Media Stream A is closed, and media are closed
Information reporting give UE1 signaling control modules.
Present invention also offers second user equipment, the second user equipment UE 2 is used for and the first user equipment (UE) 1 is built
After vertical first via voip call, first via Media Stream A is established；For returning to the second road VoIP capability query results；And it is used for
VoIP calls are established in the second road IP network with UE1, and establish the second road Media Stream B；And for terminating the first via with UE1
Media Stream A.
Further, above-mentioned second user equipment, is specifically included,
UE2 signaling control modules, for receiving the UE1 message that initiates a session request, ring response message is constructed, by UE1
The ring response message for initiating a session request and having constructed be passed to UE2 voice handover modules in the lump；Answered for being sent to UE1
Response message；For UE2 when supporting VoIP business on the second road IP network, after the capability query request for receiving UE1, replying please
Ask response；For after receiving and initiating a session request, to UE1, address to send ring response in the second road IP network；For to
UE1 addresses in the second road IP network, which are sent, answers response；
UE2 voice handover modules, initiated a session request message for parsing, preserve UE1 in the address of the second road IP network,
And the address of UE2 the second road IP network is inserted in response message, and the corresponding message changed is returned into UE1 languages
Sound handover module；
UE2 media management modules, for establishing the second road Media Stream B, first via audio medium stream is closed, and media are closed
The information reporting closed gives UE2 signaling control modules.
Present invention also offers a kind of system of IP voice call switching, including,
First user equipment (UE) 1 is used for after establishing first via voip call with second user equipment UE 2, establishes first
Road Media Stream A；And for when UE1 detect need to carry out ip voice switching when, sent to UE2 the second road IP network address
VoIP capability queries are asked；And for detecting the second road VoIP capability query results of UE2 returns, if UE2 supports the second tunnel
VoIP abilities, and UE2 establish VoIP calls in the second road IP network, and establish the second road Media Stream B；And it is used for and UE2
Terminate first via Media Stream A, after UE1 detects that first via Media Stream A terminates, terminate to converse with UE2 first via VoIP；
The second user equipment UE 2 is used for after establishing first via voip call with the first user equipment (UE) 1, establishes first
Road Media Stream A；For returning to the second road VoIP capability query results；And for being established with UE1 in the second road IP network
VoIP converses, and establishes the second road Media Stream B；And for terminating first via Media Stream A with UE1.
Using technical scheme, the both sides called are in another IP network and can dial VoIP
Phone, then VoIP calls before can be seamlessly switched to another point-to-point VoIP by the user both sides called
In call with improve speech quality or reduce expense.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the present invention, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is first embodiment of the invention flow chart；
Fig. 2 is second embodiment of the invention flow chart；
Fig. 3 is third embodiment of the invention structure chart.
Embodiment
In order that technical problems, technical solutions and advantages to be solved are clearer, clear, tie below
Drawings and examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
In an embodiment of the present invention, UE represents that user equipment (user equipment), TAS represent Telephony
Application Server (telco application server).TAS is a logic entity, is set wherein may include multiple networks
Standby, for example, in the network design of reality, it can be IMS (IP Multimedia system) core net.In a word, its generation
Table one mobile IP network of some operator deployment, user can dial VoIP in this network, and TAS can be right
VoIP is managed (such as charging etc.).
In an embodiment of the present invention, the signaling process carried out between UE by TAS, the flow between UE1 and UE2 are passed through
TAS is forwarded, and therefore, it is transparent transmission that UE1 sends the transfer process such as message or UE2 return message not being to UE2 in embodiment.
As shown in figure 1, it is first embodiment of the invention flow chart, there is provided a kind of method of IP voice call switching, its
Application scenarios are, UE1 and UE2 obtain the access of two-way IP network simultaneously, wherein have all the way access way be WLAN.Specifically
Including,
Step S101, UE1 and UE2 establish VoIP calling based on TAS；
Wherein TAS VoIP represent that VoIP, UE1 and UE2 based on TAS hand over by carrying out signaling (signal) with TAS respectively
Mutually, (set up) call relation is established.Because all signaling signal for establishing dialogue relation will pass through TAS, so
TAS can know and control UE1 and UE2 talking state.
After step S102, UE1 and UE2 call relation are established, Media Stream (media stream) A biography is begun setting up
Defeated passage；
Because TAS take part in the signaling process that UE1 and UE2 establishes call relation in step S101, in order to manage Media Stream
Transmission, TAS act as the role of media terminal, therefore the media in media stream A are not between UE1 and UE2
Transparent transmission but forwarded via TAS.
Step S103, when UE1, which is detected, needs to carry out ip voice switching, a second road VoIP ability is sent to UE2
Inquiry request (AltVoIP Cap query)；
Step S104, UE2 return to AltVoIP Cap Query Results (answer)；
Step S105, UE1 detect UE2 Query Result, if UE2 supports AltVoIP, then UE1 initiate and UE2 the
Two road VoIP establish call relation (AltVoIP signal set up)；
Step S106, after the second road VoIP call relations are established, UE1 and UE2 establish the second road Media Stream Media
Stream B；
Step S107, after Media Stream B are successfully established, UE1 and UE2 terminate (tear down) Media
Stream A；
Step S108, after UE1 detects that Media Stream A terminate, terminate the first via established with UE2
(TASVoIP) IP calls relation.
In practical implementation, UE1 sends signaling to TAS, and signaling is transmitted into UE2 again by TAS.
As the supplement of embodiment one, an also additional application scene is that above-mentioned basic scene one is supplemented, specifically,
In the case that in UE1 or UE2, only IP network accesses all the way, UE1 and UE2 carry out the voip call based on TAS.When
UE1 or UE2 enters WLAN region, when obtaining the second road IP network access based on WLAN, UE1
The VoIP client of (exemplified by this sentences UE1, UE2 is equally applicable) detects that UE1 has accessed WLAN and obtained second
The IP address of road IP accesses, then UE1 VoIP client can be initiated to consult to ask again in the first via IP callings based on TAS
Ask, the IP address of UE1 the second road IP accesses can be carried in the request.UE2 can provide response, meeting in response after receiving the request
The address of UE2 the second road IP access is carried, consults the follow-up process completed and basic scheme step 3 again and step 3 is later
Flow is identical.
As shown in Fig. 2 it is second embodiment of the invention flow chart, there is provided a kind of method of IP voice call switching, this
Signalling communication is carried out using SIP (Session Initiation Protocol, signaling initiation protocol) in embodiment, used
RTP (Real-time Transport Protocol) carries out media flow transmission.Specifically include,
Step S201, UE1, which initiate sip invite, to be asked to arrive TAS, and Alert-Info head fields are added in the request,
Alert-Info value is：“alt-addr”<XXX>.Wherein XXX represents addresses of the UE1 in the second road IP network；TAS is received
UE2 is transmitted to after sip invite requests；The sip invite requests that UE2 parsings receive, find there is " alt- in Alert-Info
Addr ", represent that UE1 needs to do to switch, UE2 preserves XXX (i.e. addresses of the UE1 in the second road IP network) value therein；
Step S202, UE2 construction ring response (sip：180), because UE2 passes through the Alert- that is obtained in step S201
Info knows that UE1 is likely to require initiation switching, so UE2 is in sip：Alert-Info fields, Alert-Info are added in 180
Value be：“alt-addr”<XXX>.Wherein XXX represents addresses of the UE2 in the second road IP network.UE2 is by sip：180 send
UE1 is transmitted to TAS, TAS.UE1, which is parsed, to be included Altert-Info and has " alt-addr " in 180 received, represented<>In
It is addresses of the UE2 in the second road IP network；UE1 is extracted and is preserved the address；
Step S203, UE2 answer the call request of UE1 initiations, send sip:200ok to TAS, TAS are by SIP：200ok turns
It is dealt into UE1；
Step S204, UE1 receive response sip of the transmission to 200ok after 200ok:Ack to TAS, TAS are by sip:Ack is forwarded
To UE2；
Step S205, UE1, UE2 establish the voice flow (media stream A) transmitted by RTP with TAS respectively；
Step S206, UE1 initiate sip to UE2:Options is asked, initiating capacity inquiry；Here UE1 is in step b
The UE2 of the middle acquisition capability query that address is initiated in the second road IP network requests；
Step S207, UE2 receive the sip of UE1 initiations:After options requests, response (sip is sent to UE1:
200ok), the VoIP of the second road IP network of support is represented.Here UE2 is in the second road IP to the UE1 obtained in step s 201
The capability query response that address is initiated in network.
Step S208, UE1 have found that UE2 supports to carry out VoIP in the second road IP network after receiving response.UE1 is sent out to UE2
Send sip：Invite is asked, and UE1 is initiated address in the second road IP network to the UE2 obtained in step S202 here
sip：Invite is asked.
Step S209, UE2 receive sip：After invite, ring response (sip is sent to UE1：180).Here UE2 be to
The UE1 obtained in step a the ring that address is initiated in the second road IP network responses.
Step S210, UE2 send to UE1 and answer response (sip:200ok).Here UE2 is to obtaining in step s 201
UE1 in the second road IP network address initiate answer response；
Step S211, UE1 are sent for sip to UE2:200ok sip:ack.Here UE1 is to obtaining in stepb
UE2 in the second road IP network address send sip:Ack is asked.
The road audio stream transmission channel of step S212, UE1 and UE2 second (media stream B) is established.
Step S213, UE1 and UE2 stop media stream A transmission.
Step S214, UE1 and UE2 send the request (sip for terminating first via VoIP calls to TAS respectively:bye)；
Step S215, TAS are sent to sip to UE1 and UE2 respectively:Bye corresponding (sip:200ok) terminate the first via
Voip call.
As in the supplement scene of second embodiment, by taking UE1 as an example, after UE1 detects WLAN accesses, initiation is consulted again
Request, the request i.e. SIP INVITE requests consistent with basic scheme implement scene step S201, the wherein request carry
Alert-Info head fields, field contents are " alt-addr "<XXX>, the IP address of wherein XXX expressions UE1 WLAN accesses.
UE2 replys 200ok after receiving the request, if UE2 also has WLAN accesses, then Alert-Info head fields are carried in 200ok,
Field contents are " alt-addr "<XXX>, the IP address of wherein XXX expressions UE2 WLAN accesses.So UE1 and UE2 pass through
The heavy negotiation mechanism of SIP sessions obtains respective WLAN IP address, then follow-up calling switching flow and basic scheme
Switching embodiment it is consistent.
As shown in figure 3, it is third embodiment of the invention structure chart, there is provided a kind of IP voice call switching system, including
UE1 and UE2, wherein,
UE1, in first via IP network, and UE2 establishes VoIP calling, detects it on the ground of the second road IP network
Location is sent to UE2 preservations, and after UE1 and UE2 first via VoIP calls are established, Media Stream A transmission channel is established with TAS；
For when UE1 detect need to carry out ip voice switching when, send the second road VoIP capability queries request to UE2；UE1 is detected
The second road VoIP capability query results that UE2 is returned, if UE2 supports the second road VoIP abilities, UE1 initiates the second tunnel with UE2
VoIP establishes call relation, and after the second road VoIP calls are established, UE1 and TAS establish the second road Media Stream B；And use
In terminating first via Media Stream A, after detecting that first via Media Stream A terminates, terminate to converse with UE2 first via VoIP；
UE2, in first via IP network, and UE1 establishes VoIP calling, detects it on the ground of the second road IP network
Location is sent to UE1 preservations, and after UE1 and UE2 first via VoIP calls are established, Media Stream A transmission channel is established with TAS；
The second road VoIP capability query results are returned for UE2；After the second road VoIP calls are established, UE2 and TAS establish second
Road Media Stream B；For terminating first via Media Stream A.
Specifically,
UE1 signaling control modules, for constructing initial sip：Invite messages, it is passed to UE1 voice handover modules；And
For the sip of Alert-Info head fields will to be added：Invite messages are sent to UE2；
UE1 voice handover modules, for inquiring about whether user needs to switch by UE1 user configuration modules；And it is used for
Judge that user needs to switch according to Query Result, in sip：Alert-Info head fields are inserted in invite messages, and are returned
To signaling control module；
UE1 user configuration modules, for returning to Query Result；
UE2 signaling control modules, for receiving UE1 sip：Invite messages, the response message of ring 180 is constructed, by UE1
Sip：Invite and the 180 corresponding messages constructed are passed to UE2 voice handover modules in the lump.
UE2 voice handover modules, for parsing sip：Invite messages, discovery have Alert-info fields, and it is parsed should
The value of field, discovery have " alt-addr " prefix, represent that UE1 may need to switch, and it preserves the ground of UE1 the second road IP accesses
Location (sip：Alet-info value in invite), and Alert-info fields are inserted in 180 response messages, its value is assigned
It is worth into UE2 the second road IP access addresses, and changed 180 corresponding messages is returned into UE1 voice handover modules；
UE1 signaling control modules, after 180 message responses for receiving UE2, the response is passed to UE1 voices switching mould
Block, second road IP access addresses of the UE2 in Alert-info during voice handover module preserves 180.
UE2 signaling control modules, for sending 200ok message to UE1；
UE1 signaling control modules, for after the 200ok responses of UE2 transmissions are received, sending ACK and being confirmed, and simultaneously
The ACK is passed to UE1 voice handover modules；
UE1 voice handover modules, for the UE2 preserved thereto by signaling control module the second road IP access addresses
Send sip：Options is asked, and whether inquiry UE2 receives voip call request in the second tunnel IP address.
UE2 signaling control modules, for UE2 when supporting VoIP business in the second road IP accesses, receive UE1 sip：
After options requests, 200ok is replied at once,
UE1 signaling control modules, for the sip that will be received：The options incoming voice handover module of 200ok responses,
UE1 voices handover module initiates the audio call to the second roads of UE2 IP access addresses by UE1 signaling control modules
Ask (sip：invite).
UE1 and UE2 media management module closes first via audio medium stream, and by the information reporting that media are closed to each
From signaling control module.UE1 and UE2 signaling control module is completed to terminate first via voip call.
The preferred embodiments of the present invention have shown and described in described above, but as previously described, it should be understood that the present invention is not
Form disclosed herein is confined to, is not to be taken as the exclusion to other embodiment, and available for various other combinations, modification
And environment, and can be carried out in the scope of the invention is set forth herein by the technology or knowledge of above-mentioned teaching or association area
Change., then all should be in institute of the present invention and the change and change that those skilled in the art are carried out do not depart from the spirit and scope of the present invention
In attached scope of the claims.
Claims (11)
- A kind of 1. method of IP voice call switching, it is characterised in that including,After first user equipment (UE) 1 and second user equipment UE 2 establish first via voip call, first via Media Stream A is established；When UE1, which is detected, needs to carry out ip voice switching, sending VoIP capability queries to UE2 the second road IP network address please Ask, UE2 returns to the second road VoIP capability query results；The second road VoIP capability query results that UE1 detections UE2 is returned, if UE2 supports the second road VoIP abilities, UE1 and UE2 exist VoIP calls are established in second road IP network, and establish the second road Media Stream B；UE1 and UE2 terminates first via Media Stream A, after UE1 detects that first via Media Stream A terminates, terminates first with UE2 Road VoIP converses；In first via IP network, UE1 and UE2 establish VoIP calling, and in the Signalling exchange for establishing first via voip call During carry the discovery that the second road IP network address completes UE1 and UE2 the second tunnel IP address.
- 2. according to the method for claim 1, it is characterised in that specifically,After UE1 and UE2 first via VoIP calls are established, first via Media Stream A is established；When UE1, which is detected, needs to carry out ip voice switching, sending VoIP capability queries to UE2 the second road IP network address please Ask, UE2 returns to the second road VoIP capability query results；The second road VoIP capability query results that UE1 detections UE2 is returned, if UE2 supports the second road VoIP abilities, UE1 is to UE2's Second road IP network address initiates the second road VoIP call requests, and UE1 and UE2 carry out the second road VoIP in the second road IP network The Signalling exchange of call, after the second road VoIP calls are established, UE1 and UE2 establish the second road Media Stream B；UE1 and UE2 terminates first via Media Stream A, after UE1 detects that first via Media Stream A terminates, terminates first with UE2 Road VoIP converses.
- 3. according to the method for claim 2, it is characterised in that in first via IP network, UE1 and UE2 establish VoIP's Call, and the IP network address completion UE1 and UE2 on the second tunnel is carried in the signalling interactive process for establishing first via voip call The second road IP network address discovery, UE1 and UE2 the first via VoIP call establish after, establish the first via Media Stream A tool Body is,UE1 initiates a session request to UE2, and this initiates a session request including UE1 the address in the second road IP network；What UE2 parsings received initiates a session request, and preserves addresses of the UE1 in the second road IP network；UE2 construction ring responses, add addresses of the UE2 in the second road IP network, by the ring in ring response Response is sent to UE1；The ring response that UE1 parsings receive, extracts and preserves addresses of the UE2 in the second road IP network；UE2 answers the call request of UE1 initiations, sends request and is responsive to UE1；UE1 sends confirmation response to UE2 after receiving the request response；The first via Media Stream A that UE1, UE2 are transmitted by realtime transmission protocol RTP.
- 4. according to the method for claim 3, it is characterised in that it is described when UE1 detect need carry out ip voice switching when, The request of VoIP capability queries is sent to UE2 the second road IP network address, it is specific that UE2 returns to the second road VoIP capability query results For,UE1 address initiating capacity inquiry requests in the second road IP network to UE2；After UE2 receives the capability query request of UE1 initiations, send UE2 to UE1 and support that the VoIP of the second road IP network should Answer, UE2 is the response asked to the UE1 capability queries that address is initiated in the second road IP network herein.
- 5. according to the method for claim 4, it is characterised in that the second road VoIP abilities that the UE1 detections UE2 is returned are looked into Result is ask, if UE2 supports the second road VoIP abilities, UE1 initiates the second road VoIP calls to UE2 the second road IP network address please Ask, UE1 and UE2 carry out the Signalling exchange that the second road VoIP converses in the second road IP network, are established when the second road VoIP converses After, UE1 and UE2 establish the second road Media Stream B specifically,UE1 confirms that UE2 supports to carry out VoIP in the second road IP network, and to UE2, address sends initiation in the second road IP network Session request；UE2 receives described after initiating a session request, and to UE1, address sends ring response in the second road IP network；To UE1, response is answered in the address transmission in the second road IP network to UE2；To UE2, the address in the second road IP network is sent for the response for answering response UE1；UE1 and UE2 establishes the second road Media Stream B.
- 6. according to the method for claim 5, it is characterised in that the UE1 and UE2 terminate first via Media Stream A, work as UE1 After detecting that first via Media Stream A terminates, terminate with UE2 first via VoIP call specifically,The termination that UE1 and UE2 sends first via VoIP calls to telco application server TAS respectively is asked；Telco application server TAS is sent to the response for terminating request to UE1 and UE2 respectively, is terminated first via VoIP and is led to Words.
- 7. the first user equipment, it is characterised in that first user equipment (UE) 1 is used for and second user equipment UE 2 establishes the All the way after voip call, first via Media Stream A is established；And for when UE1 detect need carry out ip voice switching when, to UE2 the second road IP network address sends the request of VoIP capability queries；And for detecting the second road VoIP abilities of UE2 returns Query Result, if UE2 supports the second road VoIP abilities, and UE2 to establish VoIP calls in the second road IP network, and establish second Road Media Stream B；And for terminating first via Media Stream A with UE2, after UE1 detects that first via Media Stream A terminates, terminate Conversed with UE2 first via VoIP；Specifically include：UE1 signaling control modules, for constructing the initial message that initiates a session request, it is passed to UE1 voices switching mould Block；And for the message that initiates a session request for adding addresses of the UE1 in the second road IP network to be sent into UE2；UE1 voice handover modules, for inquiring about whether user needs to switch by UE1 user configuration modules；And for basis Query Result judges that user needs to switch, and addresses of the UE1 in the second road IP network is inserted in the message that initiates a session request, And return to signaling control module.
- 8. the first user equipment according to claim 7, it is characterised in that the UE1 signaling control modules are additionally operable to receive To after UE2 ring response message, the response is passed to UE1 voice handover modules；For receiving the request response of UE2 transmissions Afterwards, UE2 is sent an acknowledgement to；For the incoming voice handover module of request response for asking the capability query received；The UE1 voices handover module is additionally operable to preserve addresses of the UE2 in the second road IP network in ring response；For passing through The second road IP access address transmitting capacity inquiry requests for the UE2 that signaling control module preserves thereto, whether inquiry UE2 is the Receive voip call request in two tunnel IP address；For being initiated by UE1 signaling control modules to the second roads of UE2 IP access addresses Initiate a session request；UE1 user configuration modules, for returning to Query Result to UE1 voices handover module；UE1 media management modules, for establishing the second road Media Stream B, first via Media Stream A is closed, and disappear what media were closed Breath reports UE1 signaling control modules.
- 9. second user equipment, it is characterised in that the second user equipment UE 2 is used for and the first user equipment (UE) 1 establishes the All the way after voip call, first via Media Stream A is established；For returning to the second road VoIP capability query results；And it is used for and UE1 VoIP calls are established in the second road IP network, and establish the second road Media Stream B；And for terminating first via media with UE1 Flow A；Specifically include：UE2 signaling control modules, for receiving the UE1 message that initiates a session request, ring response message is constructed, The UE1 ring response message for initiating a session request and having constructed is passed to UE2 voice handover modules in the lump；UE2 voice handover modules, for parsing the message that initiates a session request, UE1 is preserved in the address of the second road IP network, and The address of UE2 the second road IP network is inserted in response message, and the corresponding message changed is returned into UE1 voices and cut Change the mold block.
- 10. second user equipment according to claim 9, it is characterised in that the UE2 signaling control modules, be additionally operable to Sent to UE1 and answer response message；For UE2 when supporting VoIP business on the second road IP network, UE1 capability query is received After request, request response is replied；For after receiving and initiating a session request, to UE1, address sends and shaken in the second road IP network Bell ring should；For to UE1, response to be answered in address transmission in the second road IP network；Also include：UE2 media management modules, for establishing the second road Media Stream B, close first via audio medium stream, and by matchmaker The information reporting that body is closed gives UE2 signaling control modules.
- A kind of 11. system of IP voice call switching, it is characterised in that including,First user equipment (UE) 1 is used for after establishing first via voip call with second user equipment UE 2, establishes first via Media Stream A；And for when UE1 detect need to carry out ip voice switching when, send VoIP abilities to UE2 the second road IP network address Inquiry request；And for detecting the second road VoIP capability query results of UE2 returns, if UE2 supports the second road VoIP abilities, VoIP calls are established in the second road IP network with UE2, and establish the second road Media Stream B；And for terminating the first via with UE2 Media Stream A, after UE1 detects that first via Media Stream A terminates, terminate to converse with UE2 first via VoIP；The second user equipment UE 2 is used for after establishing first via voip call with the first user equipment (UE) 1, establishes first via matchmaker Body stream A；For returning to the second road VoIP capability query results；And lead to for establishing VoIP in the second road IP network with UE1 Words, and establish the second road Media Stream B；And for terminating first via Media Stream A with UE1；In first via IP network, the first user equipment (UE) 1 and second user equipment UE 2 establish VoIP calling, and are establishing The second road IP network address is carried in the signalling interactive process of first via voip call and completes the first user equipment (UE) 1 and the second use The discovery of second tunnel IP address of family equipment UE 2.
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| CN110582102A (en) * | 2019-08-23 | 2019-12-17 | 厦门亿联网络技术股份有限公司 | Method and system for automatically recovering call after network switching |
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