CN102131263A

CN102131263A - Ringing state domain switching method, system and device

Info

Publication number: CN102131263A
Application number: CN2011100764365A
Authority: CN
Inventors: 高扬; 周蓝粢
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2011-03-29
Filing date: 2011-03-29
Publication date: 2011-07-20
Anticipated expiration: 2031-03-29
Also published as: WO2012129979A1; CN102131263B

Abstract

The invention discloses a ringing state domain switching method, system and device. The method comprises the steps: when the ringing state domain is switched, a mobile switching centre (MSC) and a far end are in successful media resource negotiation, and a single-radio frequency voice service continues application server (SCC AS) initiatively transmits a called off-hook answer message to the far end; and the far end receives the called off-hook answer message to confirm that the domain switching is completed. Due to the technical scheme, the problem that the ringing state domain switching steps are multiple and are more complex in the prior art is solved, the required steps are reduced, and the realization difficulty is lowered.

Description

The method, system and device that switch in ring attitude territory

Technical field

The present invention relates to the communications field, the method, system and device that switch in particular to a kind of ring attitude territory.

Background technology

IMS (IP Multimedia Subsystem, internet protocol multimedia subsystem) is the developing direction of following multimedia communication, also is the of paramount importance part of next generation network.It is 3GPP (Third Generation Partnership Project, third generation partner program) subsystem of the support IP multimedia service of Ti Chuing, its notable feature is to have adopted SIP (Session Initial Protocol, session initiation protocol) system, communication is irrelevant with access way, can possess that multiple multimedia service controlled function is separated with bearing capacity, calling separates with session, application separates with service, business and network detach, and multiple abilities such as mobile network and internet service fusion.

SRVCC (Single Radio Voice Call Continuity, injection is voice business continuity frequently) can realize that the wireless user is under the environment of Single Radio (injection is frequently), voice between IMS and CS (Circuit Switched, circuit switching) switch.UE (the User Equipment of the corresponding Single Radio of SRVCC, subscriber equipment), be Radio (radio frequency), LTE (the Long Term Evolution that can only use 2G/3G at one time, long evolving system) a kind of among the UE of Radio, the demand of Single Radio is that manufacturer terminal proposes, and its objective is the radio frequency and the interlock circuit of multiplexing 2G/3G, LTE network.

3GPP has proposed SRVCC ring attitude and has switched called pattern in the normal process method of PS (Packet Switched, packet switching) when reply in the territory, the method that provides a kind of ring attitude territory to switch in fact.Be MSC (Mobile Switching Center, mobile switching centre) replace UE to initiate the solicit operation that switch in ring attitude territory, SCCAS (is SRVCCAS, Single Radio Voice Call Continuity Application Server, injection is the voice business continuity application server frequently) when receiving the handover operation request of this territory, use UPDATE (renewal) message to remove to upgrade far-end; This moment, the called subscriber replied at PS territory off-hook, and SCCAS is with this response message interception; After the territory switching media consulted to finish, SCC AS sent INFO (notice) message informing MSC related session information, and carries switch mode; UE switches to the CS territory, and transmission CS Connect (being the off-hook response message of UE in the CS territory) notifies MSC user off-hook, MSC then sends the INFO notice SCC AS that band is replied sign, the called off-hook of SCC AS judgement is replied, then send 200OK message (a kind of sip message incident, be used to notify the called off-hook of caller to reply) give caller, finish handoff procedure.Whole process steps is more, realizes comparatively complicated.

Summary of the invention

Main purpose of the present invention is to provide the method, system and device of a kind of ring attitude territory switching, to address the above problem.

According to an aspect of the present invention, the method that provides a kind of ring attitude territory to switch, comprise: in the handoff procedure of ring attitude territory, moving exchanging center MSC and far-end carry out after media resource consults successfully, and injection voice business continuity application server SCCAS frequently initiatively sends called off-hook response message to far-end; Far-end receives this called off-hook response message, determines that the territory handover operation finishes.

According to a further aspect in the invention, the system that provides a kind of ring attitude territory to switch, comprise: moving exchanging center MSC, injection be voice business continuity application server SCC AS, local terminal, far-end frequently, wherein, above-mentioned SCC AS comprises: the active responder module, this is responder module initiatively, is used for carrying out after media resource consults successfully at definite MSC and far-end, and active sends called off-hook response message to far-end; Said distal ends is used for receiving this called off-hook response message, determines that the territory handover operation finishes.

According to another aspect of the invention, a kind of ring attitude territory device for switching is provided, be arranged on the injection frequency voice business continuity application server SCCAS, comprise: the active responder module, be used for carrying out after media resource consults successfully at definite MSC and far-end, initiatively send called off-hook response message, make far-end determine that the territory handover operation finishes to far-end.

By the present invention, employing is carried out after media resource consults successfully at MSC and far-end, SCC AS initiatively sends the response message of called off-hook response message to far-end, finish the scheme of territory handover operation, it is more to have solved in the prior art ring attitude territory switch step, realize comparatively complicated problems, reduced required step, reduced the realization difficulty.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:

Fig. 1 is the flow chart according to the method for the ring attitude territory switching of the embodiment of the invention;

Fig. 2 is the flow chart of the method for the territory of ring attitude according to the preferred embodiment of the invention switching;

Fig. 3 is the flow chart schematic diagram of the method switched of the ring attitude territory of the example according to the present invention;

Fig. 4 is the structured flowchart according to the system of the ring attitude territory switching of the embodiment of the invention;

Fig. 5 is the structured flowchart of the system of the territory of ring attitude according to the preferred embodiment of the invention switching;

Fig. 6 is the structured flowchart according to the ring attitude territory device for switching of the embodiment of the invention;

Fig. 7 is the structured flowchart of the territory of ring attitude according to the preferred embodiment of the invention device for switching.

Embodiment

Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.

Fig. 1 is the flow chart according to the method for the ring attitude territory switching of the embodiment of the invention.As shown in Figure 1, the method for switching according to the ring attitude territory of the embodiment of the invention comprises:

Step S102, in the handoff procedure of ring attitude territory, MSC and far-end carry out after media resource consults successfully, and SCC AS initiatively sends called off-hook response message to far-end (being call-originating end);

Step S104, far-end receive this called off-hook response message, determine that the territory handover operation finishes.

In the ring attitude territory handoff procedure that 3GPP proposes, send twice called off-hook response message and (promptly be used to notify the far-end called end off-hook message of replying, or directly be called the off-hook response message), for the first time be the off-hook response message of local terminal (being called end), also need local terminal to switch to the CS territory afterwards and send the called off-hook response message of CS Connect again one time in the transmission of PS territory off-hook.Because called off-hook replys before this, what see for local terminal then is that (switch in the territory of conversation state) switched in territory after the stable state, so when this moment, called end switched to the CS territory, do not need to have sent called off-hook response message once more.Pass through said method, utilize SCC AS to know that when sending for the second time the off-hook response message called off-hook replys this condition, control whole flow process by SCC AS, carry out after media resource consults successfully at MSC and far-end, initiatively send called off-hook response message, to finish handoff procedure to far-end.Send the necessity of off-hook response message for the second time thereby eliminated, reduced the required step of whole handoff procedure, it is more easy that switching is implemented.

Preferably, as shown in Figure 2, the method that switch in the territory of ring attitude according to the preferred embodiment of the invention can further include:

Step S202, MSC replace local terminal to initiate the territory handoff request;

Step S204, SCCAS receive this territory handoff request, related local terminal and far-end;

Step S206, SCCAS send UPDATE information updating far-end;

When step S208, SCCAS receive called off-hook response message, should called off-hook response message interception.

Above-mentioned steps is the initial step in the whole handoff procedure, and promptly initial session is set up when being in the ring attitude, the success of calling and called resource negotiation; At this moment, the wireless access fade out, MSC replaces local terminal to initiate territory handover operation request; SCC AS receives the territory handoff request, related local terminal and far-end; SCCAS sends UPDATE message and removes to upgrade far-end (medium renewal); At this moment, the called subscriber replys at PS territory off-hook; SCCAS receives the called subscriber when the message that PS territory off-hook is replied, then with this called off-hook response message interception.Step S210 after the step S208 is equivalent to above-mentioned step S102, and step S212 is equivalent to above-mentioned step S104.

Preferably, as shown in Figure 2, after step S112, can further include:

Step S214, SCC AS discharges the calling of formerly setting up.

Corresponding with above-mentioned steps, after the territory handover operation was finished, SCC AS had called out on that road in PS territory before just can discharging service-user, is not wasted to guarantee resource.

Preferably, above-mentioned called off-hook response message can comprise: the 200OK message that off-hook is replied.

Adopt 200OK message represent the called subscriber off-hook reply, implement the simplest, convenient.

Be elaborated below in conjunction with example and 3 pairs of above preferred embodiments of accompanying drawing.

Fig. 3 is the flow chart schematic diagram of the method switched of the ring attitude territory of the example according to the present invention.As shown in Figure 3, the method that switch in the ring attitude territory of example according to the present invention may further comprise the steps:

Step S302, UE_B carry caller SDP (Session description protocol, Session Description Protocol) and initiate a call to the SRVCC user UE_A in the PS territory, and UE_A has anchored to SCC AS; UE_A replys the ALERTING message (180 message) with called SDP; The two ends resource has been consulted success, and this session is in ringing condition; UE_A reports the wireless access signal to give E-UTRAN (Evolved Universal Mobile Telecommunications System Terrestrial Access, the universal mobile telecommunications system land radio access web of evolution), E-UTRAN triggers SRVCChandover (switching) to the CS territory according to the wireless access signal deciding; MSC carries STR-SR (Session Transfer Number-Single Radio, session Handover Number) initiation session handover operation; UE_A is in ringing condition always;

Step S304, MSC initiates initial INVITE (invitation) session handoff request, and to carry Request-URI (Request-Uniform Resource Identifier, the generic resource identifier of requirement) be STR-SR, the SDP that MGW (Media Gateway, media gateway) supports;

The INVITE that step S306, IM CN (IP Multimedia Core Network, IP multimedia core network) transmit the session switching asks to SCCAS;

Step S308, SCCAS carries out local terminal and far-end related, therefore before during the calling and called ringing condition initial resource consult, so SCC AS prepares the renewal of far-end is operated; SCC AS sends UPDATE message and removes to upgrade far-end; This section medium SDP represents that resource can use;

Step S310, IM CN transmit this UPDATE message and give terminal UE _ B;

Step S312, in the handoff procedure, called subscriber UE_A replys at PS territory off-hook;

Step S314, UE_A send the 200OK message that off-hook is replied in the PS territory;

Step S316, IM CN transmit 200OK message to SCCAS; When SCCAS receives 200OK message, judge that carrying out the territory switches, and then tackles this 200OK message;

Step S318, UE_B replys 200OK (UPDATE), and the carried terminal media capability;

Step S320, IM CN transmits 200OK and gives SCCAS;

Step S322, SCCAS sends 183 message (response message of INVITE) of tape terminal media capability;

Step S324, IM CN transmit 183 message and give MSC;

Step S326, MSC replys Prack (Temporary Response message);

Step S328, IM CN transmits Prack to SCCAS;

Step S330, SCC AS replys the 200OK of Prack;

Step S332, IM CN transmits 200OK to MSC;

Step S334, SCC AS sends the INFO request, comprises session related information, carry the called switching sign of SCC, and state is ready;

Step S336, IM CN transmit this INFO and give MSC; MSC receives INFO, and that is judged to switching in called terminal ringing attitude territory according to message content;

Step S338, MSC replys the response message 200OK of INFO;

Step S340, IM CN transmits 200OK (INFO) message;

When step S342, MSC receive the INFO that carries session related information, enter call-delivery state (Call delivered state);

Step S344, UE receive the handover that E-UTRAN sends;

Step S346, UE switch to the CS territory;

Step S348, SCCAS judge that the territory switching media consults successfully, and called off-hook replys, and then send the 200OK message that off-hook is replied;

Step S350, IM CN transmit this response message and give calling subscriber UE_B;

Step S352, calling subscriber UE_B replys ACK (Acknowledge Character, acknowledge character);

Step S354, IM CN transmits ACK to SCC AS;

Step S356, SCCAS sends 200OK (INVITE) response message, to inform the MSC handover success;

Step S358, IM CN transmit 200OK (INVITE) message to MSC;

Step S360, MSC replys ACK message;

Step S362, IM CN transmits ACK to SCC AS;

Step S364, SCCAS reply the response message ACK of called subscriber at PS territory off-hook;

Step S366, IM CN transmit this ACK to UE (PS territory);

Step S368, SCCAS discharge original called subscriber and call out on that road in PS territory.

Fig. 4 is the structured flowchart according to the system of the ring attitude territory switching of the embodiment of the invention.As described in Figure 4, the system of switching according to the ring attitude territory of the embodiment of the invention comprises: MSC, SCCAS, local terminal (called end), far-end (call-originating end), wherein:

Above-mentioned SCC AS comprises: responder module 42 initiatively, be connected to said distal ends, and be used for carrying out after media resource consults successfully at definite MSC and far-end, active sends called off-hook response message to far-end;

Said distal ends is used to receive above-mentioned called off-hook response message, determines that the territory handover operation finishes.

Said system, utilized SCCAS to know that when sending for the second time the off-hook response message called off-hook replys this condition, carry out after media resource consults successfully at MSC and far-end, active responder module 42 by SCC AS initiatively sends called off-hook response message to far-end, to finish handoff procedure.Thereby do not need to send off-hook response message for the second time again, reduced the required step of whole handoff procedure, it is more easy to implement.

Preferably, above-mentioned MSC is used for replacing being equipped with local terminal (being called end) and initiates the territory handoff request;

As shown in Figure 5, above-mentioned SCCAS can further include:

Related update module 44 is connected to above-mentioned MSC and far-end, is used to receive above-mentioned territory handoff request, and related local terminal and far-end send updating message and upgrade far-end;

Reply blocking module 46, be connected to above-mentioned MSC and far-end, be used for when receiving called off-hook response message, should called off-hook response message interception.

In the initial procedure in handoff procedure, initial session is set up when being in the ring attitude, the success of calling and called resource negotiation; At this moment, the wireless access fade out, MSC replaces local terminal to initiate territory handover operation request; Related update module 44 among the SCC AS is received the territory handoff request, related local terminal and far-end, and transmission UPDATE message removes to upgrade far-end; At this moment, the called subscriber replys at PS territory off-hook; Reply blocking module 46 and receive the called subscriber when the message that PS territory off-hook is replied, then with this called off-hook response message interception.

Preferably, as shown in Figure 5, above-mentioned SCCAS can further include:

Call out release module 48, be connected to said distal ends, be used for after the territory handover operation is finished, discharge the calling of formerly setting up.

After the territory handover operation was finished, calling release module 48 had been called out on that road in PS territory before just can discharging service-user, is not wasted to guarantee resource.

Fig. 6 is the structured flowchart according to the ring attitude territory device for switching of the embodiment of the invention.As shown in Figure 6, the ring attitude territory device for switching according to the embodiment of the invention comprises:

Responder module 62 initiatively is used for carrying out after media resource consults successfully at definite MSC and far-end, and active sends called off-hook response message to far-end, makes far-end determine that the territory handover operation finishes.

By said apparatus, initiatively responder module 62 carries out can initiatively sending called off-hook response message to far-end after media resource is consulted successfully at definite MSC and far-end, to finish handoff procedure.Thereby do not need to send off-hook response message for the second time again, reduced the required step of whole handoff procedure, it is more easy to implement.

Preferably, as shown in Figure 7, can further include according to the ring attitude territory device for switching of the embodiment of the invention:

Related update module 64 is used to receive the territory handoff request that MSC replaces local terminal to initiate, and related local terminal and far-end send updating message and upgrade far-end;

Reply blocking module 66, with related update module 64 and initiatively responder module 62 link to each other, be used for when receiving called off-hook response message, should called off-hook response message tackling;

Call out release module 68, link to each other, be used for after the territory handover operation is finished, discharge the calling of formerly setting up with active responder module 62.

In whole handoff procedure, initial session is set up when being in the ring attitude, the success of calling and called resource negotiation; At this moment, the wireless access fade out, MSC replaces local terminal to initiate territory handover operation request; Related update module 64 among the SCC AS is received the territory handoff request, related local terminal and far-end, and transmission UPDATE message removes to upgrade far-end; At this moment, the called subscriber replys at PS territory off-hook; Reply blocking module 66 and receive the called subscriber when the message that PS territory off-hook is replied, then with this called off-hook response message interception.After the territory handover operation was finished, calling release module 68 had been called out on that road in PS territory before just can discharging service-user, is not wasted to guarantee resource.

As can be seen from the above description,, simplified the process that switch in ring attitude territory, made whole handoff procedure more reasonable, realized more quick, convenient by technical scheme provided by the invention.

Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. the method that switch in ring attitude territory is characterized in that, comprising:

In the handoff procedure of ring attitude territory, moving exchanging center MSC and far-end carry out after media resource consults successfully, and injection voice business continuity application server SCC AS frequently initiatively sends called off-hook response message to far-end;

Described far-end receives described called off-hook response message, determines that the territory handover operation finishes.

2. method according to claim 1 is characterized in that,, also comprises before far-end sends called off-hook response message in described SCC AS active:

Described MSC replaces local terminal to initiate the territory handoff request;

Described SCC AS receives described territory handoff request, related described local terminal and described far-end;

Described SCC AS sends updating message and upgrades described far-end;

When described SCC AS receives called off-hook response message, should called off-hook response message interception.

3. method according to claim 1 is characterized in that, after described far-end receives described called off-hook response message, determines that the territory handover operation is finished, also comprises:

Described SCC AS discharges the calling of formerly setting up.

4. according to each described method of claim 1 to 3, it is characterized in that described called off-hook response message comprises: the 200OK message that off-hook is replied.

5. the system switched of a ring attitude territory, comprising: moving exchanging center MSC, injection be voice business continuity application server SCCAS, local terminal, far-end frequently, it is characterized in that,

Described SCC AS comprises: responder module initiatively, and wherein, described active responder module is used for carrying out after media resource consults successfully at definite described MSC and described far-end, and active sends called off-hook response message to described far-end;

Described far-end is used to receive described called off-hook response message, determines that the territory handover operation finishes.

6. system according to claim 5 is characterized in that,

Described MSC is used to replace described local terminal to initiate the territory handoff request;

Described SCCAS also comprises:

The related update module is used to receive described territory handoff request, and related described local terminal and described far-end send updating message and upgrade described far-end;

Reply blocking module, be used for when receiving called off-hook response message, should called off-hook response message interception.

7. system according to claim 5 is characterized in that, described SCCAS also comprises:

Call out release module, be used for after the territory handover operation is finished, discharge the calling of formerly setting up.

8. according to each described system of claim 5 to 7, it is characterized in that described called off-hook response message comprises: off-hook is replied 200OK message.

9. a ring attitude territory device for switching is arranged on the injection frequency voice business continuity application server SCCAS, it is characterized in that, comprising:

Responder module initiatively is used for carrying out after media resource consults successfully at definite described MSC and described far-end, and active sends called off-hook response message to described far-end, makes described far-end determine that the territory handover operation finishes.

10. device according to claim 9 is characterized in that, also comprises:

The related update module is used to receive the territory handoff request that moving exchanging center MSC replaces user equipment (UE) to initiate, and related described UE and far-end send updating message and upgrade described far-end;

Reply blocking module, be used for when receiving called off-hook response message, should called off-hook response message interception;