CN101835223A - Voice business continuity switching method - Google Patents
Voice business continuity switching method Download PDFInfo
- Publication number
- CN101835223A CN101835223A CN200910128404A CN200910128404A CN101835223A CN 101835223 A CN101835223 A CN 101835223A CN 200910128404 A CN200910128404 A CN 200910128404A CN 200910128404 A CN200910128404 A CN 200910128404A CN 101835223 A CN101835223 A CN 101835223A
- Authority
- CN
- China
- Prior art keywords
- message
- territory
- enhanced msc
- sends
- msc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention relates to a voice business continuity switching method which comprises the following steps: when an IMS (IP Multimedia Subsystem) session of UE (User Equipment) is switched from LTE/SAE (Long Term Evolution/System Architecture Evolution) network access to CS (Circuit Switched) domain access during voice business continuity switching, the UE sends a switching completion message to an enhanced MSC (Mobile Switching Center) through target access equipment of a CS domain; after the switching completion message is received and a domain switching success response sent by an SCC AS is confirmed to be received, the enhanced MSC sends a message used for indicating that the IMS session is switched to the CS domain access to an MME (Mobility Management Entity) completely; after the message sent by the enhanced MSC is received, the MME sends an indicating message used for releasing the carrying resource of the IMS session established in the LTE/SAE network. In conclusion, the voice business continuity switching method solves the problem of switching failure caused by wrong release of the whole session after the MME receives the switching completion message.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of voice business continuity switching method.
Background technology
In order to guarantee that speech business is at circuit switching (Circuit Switched, be called for short CS) territory and IP (network interconnection agreement, Intemet Protocol, be called for short IP) IP multimedia subsystem, IMS (IP Multimedia CoreNetwork Subsystem, abbreviation IMS) continuity between the territory, solution as shown in Figure 1 for traditional voice business continuity (Voice Call Continuity is called for short VCC).
Wherein, dual-mode user device (User Equipment, be called for short UE) at CS territory and IMS network all successfully after the registration, when UE in the CS territory or IMS network when initiating speech business, all anchor to professional and session service application server for continuity (the Service Centralizationand Continuity Application Server of centralized control of IMS network, be called for short SCC AS) in, this moment, UE had two signs that SCC AS is known:
1) sign (Session Transfer URI is called for short STI) is switched in session, is used for expression user conversation is switched to the IMS network at operation layer from the CS territory, perhaps switches between packet domain (PS territory);
2) session Handover Number (Session Transfer Number is called for short STN) is used for expression user conversation is switched to the CS territory at operation layer from the IMS network.
Switch to the PS territory and insert when UE prepares a session of having set up inserted from the CS territory, perhaps insert from a PS territory when switching to another PS territory and inserting, UE carries the STI sign in the IMS network, SCC AS is initiated a session request; After receiving this conversation request, SCC AS switches to IMS network at operation layer from the CS territory with this session, perhaps switches to another PS territory from a PS territory.
When UE has initiated speech business at the IMS network, when preparation switches to the CS territory from the IMS network, UE uses STN as called number in the CS territory, SCC AS is initiated a session request, after SCC AS receives this conversation request, the speech business of correspondence is switched to the CS territory from the IMS network, thereby finish whole switching.
In Fig. 1, the session to SCC AS that UE is set up by the IMS network is called source session branch (source session Leg), this section session was the source session when expression switched to the CS territory from the IMS network, and the session to SCC AS that UE is set up by the CS territory is called CS session branch (CS session Leg); SCC AS is called far-end session Leg to the session of called UE.
Described above is that traditional VCC realizes principle.Wherein, UE is a dual-mode terminal, need support Dual Radio (dual-mode dual-standby) simultaneously, promptly simultaneously can carry out audio call at IMS network and CS territory.
Development along with network architecture flattening, and multiple high-speed wideband moves the appearance of access way, the mobile communication standard tissue has proposed to be called as LTE/SAE (Long Term Evolution/SystemArchitecture Evolution, Long Term Evolution/System Architecture Evolution) next generation network framework, this network architecture makes the wireless communication system of evolution that higher transmission rate can be provided, shorter transmission delay, and has a lower cost, support 3GPP (3rd Generation Partnership Project simultaneously, third generation partner program) mobility between the inner connecting system, and the mobility between 3GPP connecting system and the non-3GPP connecting system etc.Simultaneously, LTE/SAE also will support original VCC function as a kind of access means of IMS network.
Yet, because UE battery power consumption under the bimodulus pattern is very big, and LTE/SAE itself has powerful reasons such as mobility management capabilities, single wireless channel (Single Radio) voice business continuity (Single Radio Voice Call Continuity is called for short SRVCC) technology has been proposed.The principle Organization Chart of the scheme of realization SRVCC as shown in Figure 2 at present.
Among Fig. 2 there be the SAE related network elements:
E-UTRAN (Evolved UTRAN, the universal land radio access web of evolution): i.e. the wireless access network of evolution is follow-on wireless access network, and higher up-downgoing speed can be provided, lower transmission delay and more reliable wireless transmission.
MME (Mobility Management Entity, Mobility Management Entity): be the chain of command functional entity, be in charge of and store the UE context (such as UE sign/user ID, mobility management states, user security parameters etc.), for the user distributes temporary mark, and when quartering at corresponding tracing area or network, is responsible for UE this user is carried out authentication.
SAE GW (SAE gateway): be the user plane functions entity, be responsible for the user face data route and handle, be divided into two kinds of Serving and PDN.Serving SAE GW (be called for short gateway, or SGW) is mobile anchor point between SAE system and traditional 3GPP system and the mobile anchor point between the E-UTRAN; PDN GW (packet data network gateway) be used to the terminate downlink data of the UE that is in idle state is initiated paging when the downlink data that mails to UE arrives, and the context of management and storage UE, such as IP bearer service parameter and network internal routing iinformation etc.
Among Fig. 2, the 2G/3G mobile network comprises following network element:
Wireless access network comprises GERAN (the GSM EDGE Radio Access Network of 2G, strengthen the global system for mobile communications Radio Access Network of data rate) and the UTRAN (UniversalTerrestrial Radio Access Network, universal land radio access web) of 3G; Core net comprises circuit domain network element MSC (Mobile Switch Center, mobile switching centre) and grouping domain network element Serving GPRS Support Node (Serving GPRS Support Node is called for short SGSN).Wherein, MSC provides circuit voice business, circuit data service and short message service, and SGSN links to each other with SAE GW among the LTE/SAE, and packet switch domain service is provided.
Home subscriber server (Home Subscriber Server is called for short HSS), the data that are used to manage CS territory, PS territory and IMS network.
Among Fig. 2, the IMS network comprises: CSCF (Call Session ControlFunction, be called for short CSCF), MGCF (Media Gateway ControlFunction is called for short MGCF) waits core network element, and the SCC AS of realization VCC function.
Based on framework shown in Figure 2, UE can insert the IMS network by LTE/SAE, also can insert the IMS network by the PS territory (being GERAN/UTRAN and SGSN among Fig. 2) of 2G and 3G, enjoys the business of IMS network, can also insert simultaneously the CS territory of 2G and 3G, use CS business such as speech business.
More than the network for existing in the prior art in order to realize the single wireless channel voice business continuity, strengthens existing MSC, is provided with enhanced MSC.Enhanced MSC all links to each other with the MSC of CS domain core net unit of 2G/3G, the core network element in PS territory and the MME of LTE/SAE network, is used to control the switching of LTE/SAE network and 2G/3G network.Enhanced MSC also links to each other with SCC AS by the MGCF of IMS network, and all-calls can both be anchored among the SCC AS of IMS network, has guaranteed the realization of VCC basic function.
Interface adopts E interface between enhanced MSC and the MSC.E interface adopts MAP (Mobile Application Part is called for short MAP) signaling, switches the inter-office switchover mode that adopts the CS territory between enhanced MSC and the MSC.Be provided with if MSC that strengthens and MSC merge, the interacting message between them is then realized by inner Signalling exchange.
Under the SRVCC framework, the session to SCC AS that UE sets up by LTE/SAE network and IMS network can be called source session Leg (promptly being based upon the sessions carry resource between UE and the SCC AS) equally; The enhanced MSC that UE is set up by the CS territory is called CS session Leg (promptly being based upon the sessions carry resource between enhanced MSC and the SCC AS) to the session between the SCC AS; SCC AS is called far-end session Leg (promptly being based upon the sessions carry resource between SCC AS and the far-end UE) to the session of far-end UE.
Fig. 2 A is under SRVCC framework shown in Figure 2, and session is switched to CS network insertion (promptly inserting from GERAN/UTRAN), the flow chart during handoff failure from LTE/SAE network insertion (promptly inserting from E-UTRAN).In this flow process, UE has set up a session by LTE/SAE access network and UE-B at the IMS network, and this Session Anchor has arrived among the SCC AS; At this moment, there is the source session Leg that is based upon the LTE/SAE access network between UE and the SCCAS, and the far-end session Leg between SCC AS and the UE-B.Switching flow shown in Fig. 2 A may further comprise the steps:
A201, UE send measurement report to E-UTRAN after receiving the measurement request that LTE/SAE wireless net member E-UTRAN sends, comprise adjacent district information in the described measurement report;
A202, E-UTRAN are according to the adjacent district information in the measurement report, and decision is initiated to switch, and therefore sends RELOCATION REQUEST message to MME;
A203, after MME receives RELOCATION REQUEST message, according to the information that wherein comprises, send RELOCATION REQUEST message forward to enhanced MSC, sign STN and user's integrated services digital network (Integrated Service Digital Network is called for short ISDN) number is switched in the territory of carrying the user in this message;
Above-mentioned STN and ISDN number are information and the configuration of MME according to the user, acquire from the HSS of correspondence.
A204, enhanced MSC sends MAP to MSC and prepares handoff request message;
A205, MSC send to switch to GERAN/UTRAN and require request message, and GERAN/UTRAN returns to switch to MSC and requires acknowledgement message;
A206, MSC returns MAP to enhanced MSC and prepares handover request ack message, carries Handover Number in this message, and this Handover Number is distributed by MSC;
A207, enhanced MSC set up with MSC between circuit be connected.For example enhanced MSC sends the integrated digital service-user part signaling initial address message of (ISDN User Part is called for short ISUP) according to Handover Number to MSC, and MSC returns the Address Complete Message of ISUP to enhanced MSC;
It should be noted that if enhanced MSC and MSC merge to be provided with then above-mentioned steps A204, A206 and A207 merge inner realization of network element device of setting at this.
A208, enhanced MSC is initiated territory handoff request message to the SCC in IMS territory AS; Enhanced MSC by the IMS network MGCF and CSCF to the initial address message that SCC AS sends ISUP, carry STN and ISDN number in this message; ISDN number and STN are used to indicate SCC AS that the session of correspondence is switched to the CS territory at operation layer from the IMS network; SCC AS sends response message to enhanced MSC;
This step also can be that enhanced MSC directly sends SIP (Session InitialProtocol to SCC AS, initial session protocol) conversation request message, the telecommunications universal resource identifier (tel URI) of carrying STN in this message or being converted to by user's ISDN number; SCC AS returns SIP success message (200OK message) to enhanced MSC;
Enhanced MSC also can send to SCC AS with STN by trigger intelligent business, obtains routing number from SCC AS, uses routing number that message is directly sent to SCC AS then.
Enhanced MSC is by ISUP initial address message or SIP conversation request message in this step, and notice SCC AS need carry out voice business continuity and switch, and request SCC AS switches to CS territory at operation layer from the IMS network with respective session.
Set up the CS session Leg between enhanced MSC and the SCC AS this moment.
A209, SCC AS upgrade far-end session Leg, it is linked to each other with CS session Leg, and timer T is set, and are used for source of release session Leg when timer expiry;
Timer T is set guarantees after whole switching is finished, source of release session Leg.
A210, enhanced MSC is returned relocation response message forward to MME;
A211, MME returns relocation response message to E-UTRAN;
A212, E-UTRAN returns the reorientation command messages to UE;
After A213, UE receive described reorientation command messages, send switching to the target access device GERAN/UTRAN in CS territory and insert message.
A214 after GERAN/UTRAN detects switching, sends change detection to message to MSC;
A215, MSC sends MAP to enhanced MSC and handles access signaling message, and this message is used to notify the enhanced MSC user terminal to begin to insert from the CS territory;
A216, UE sends handoff completion message to GERAN/UTRAN;
A217, GERAN/UTRAN sends handoff completion message to MSC;
A218, MSC sends MAP to enhanced MSC and sends end signal message, and notice enhanced MSC user terminal has switched to the CS territory, and enhanced MSC is known to switch according to this MAP end signal message and is finished;
Be provided with if MSC and enhanced MSC merge, then enhanced MSC is received that the handoff completion message of steps A 217 is known to switch and is finished.
A219, after enhanced MSC receives that described UE switches the message of finishing (being that MAP sends end signal message) by the expression of objective network (being GERAN/UTRAN or GERAN/UTRAN and MSC) transmission, send PS to the CS handoff completion message to MME, be accomplished to the switching that the CS territory is inserted with expression IMS session, MME returns PS to the CS switching authentic information;
A220, MME receive described PS behind the CS handoff completion message, and indication discharges the bearing resource that is based upon the described session under the LTE/SAE network;
A221, MSC is to enhanced MSC loopback ISUP response message (the ISUP initial address message of corresponding steps A 207);
So far, Dui Ying IMS session has been finished to switch to from the CS territory from the LTE/SAE network insertion and has been inserted.
The HO-break duration (being the time of steps A 213 to steps A 221) of existing wireless technology is approximately 60 to 150ms, owing to need to carry out the SIP route in steps A 208, the time that the SCC AS in territory handoff request message arrival IMS territory needs might surpass 600ms; Therefore according to prior art, when the territory of steps A 208 handoff request message does not also arrive SCC AS, execution in step A220, and steps A 220 may cause the release whole session, so can cause whole handoff failure because can not find the Session Resources that needs switching behind the territory handoff request message arrival SCC AS of steps A 208.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the deficiencies in the prior art, and a kind of voice business continuity switching method is provided, can't be correctly with the problem of IMS session from LTE/SAE network insertion successful switch to the CS network insertion in the prior art to overcome.
In order to address the above problem, the invention provides a kind of voice business continuity switching method, this method comprises:
Carrying out the voice business continuity switching, when Long Term Evolution/System Architecture Evolution LTE/SAE network insertion switched to circuit commutative field CS territory and inserts, UE sent handoff completion message by the target access device in CS territory to strengthening moving exchanging center MSC with the IP Multimedia System IMS session of user equipment (UE);
After receiving described handoff completion message, enhanced MSC sends to Mobility Management Entity MME and to be used to represent that described IMS session finished the message that switches to the access of CS territory after confirming to have received the territory handover success response that centralized control is professional and session service application server for continuity SCC AS sends;
After receiving the described message of enhanced MSC transmission, MME sends the Indication message that is used to discharge the bearing resource that is based upon the described IMS session under the LTE/SAE network.
In addition, described territory handover success response is: the Address Complete Message of integrated digital service-user part signaling ISUP or the response message of ISUP.
In addition, described territory handover success response is: the success response message of message or SIP is carried out in the ALERTING message of initial session protocol SIP or the session of SIP.
In addition, receive the described message that enhanced MSC sends after, MME sends described Indication message to policy controlling system.
The present invention also provides a kind of voice business continuity switching method, and this method comprises:
Switch carrying out voice business continuity, when the LTE/SAE network insertion switched to the CS territory and inserts, UE sent handoff completion message by the target access device in CS territory to enhanced MSC with the IMS session of UE;
After receiving described handoff completion message and postponing predefined time span, enhanced MSC sends to MME and is used to represent that described IMS session has been finished switches to the message that the CS territory is inserted;
After receiving the described message of enhanced MSC transmission, MME sends the Indication message that is used to discharge the bearing resource that is based upon the described IMS session under the LTE/SAE network.
In addition, receive described handoff completion message after, enhanced MSC is the operation that the timer of described predefined time span is realized the described Indication message of delayed delivery by starting a length.
In addition, receive the described message that enhanced MSC sends after, MME sends described Indication message to policy controlling system.
The present invention also provides a kind of voice business continuity switching method, and this method comprises:
Switch carrying out voice business continuity, when the LTE/SAE network insertion switched to the CS territory and inserts, UE sent handoff completion message by the target access device in CS territory to enhanced MSC with the IMS session of UE;
After receiving described handoff completion message, enhanced MSC sends to MME and is used to represent that described IMS session has been finished switches to the message that the CS territory is inserted;
After receiving the described message of enhanced MSC transmission and postponing predefined time span, MME sends the Indication message that is used to discharge the bearing resource that is based upon the described IMS session under the LTE/SAE network.
In addition, receive the described message that enhanced MSC sends after, MME is the operation that the timer of described predefined time span is realized the described Indication message of delayed delivery by starting a length.
In addition, receive the described message that enhanced MSC sends after, MME sends described Indication message to policy controlling system.
In sum, adopt voice business continuity switching method of the present invention, solved the problem of the wrong handoff failure that discharges whole session and cause after MME receives handoff completion message.
Description of drawings
Fig. 1 is the VCC solution schematic diagram of IMS in the prior art;
Fig. 2 is the configuration diagram that realizes the scheme of SRVCC in the prior art;
Fig. 2 A is under SRVCC framework shown in Figure 2, and session is switched to CS network insertion (promptly inserting from GERAN/UTRAN), the flow chart during handoff failure from LTE/SAE network insertion (promptly inserting from E-UTRAN);
Fig. 3 carries out the method flow diagram that voice business continuity switches (switch to from the CS territory from the LTE/SAE network insertion and insert) for first embodiment of the invention under based on SRVCC framework shown in Figure 2;
Fig. 4 carries out the method flow diagram that voice business continuity switches (switch to from the CS territory from the LTE/SAE network insertion and insert) for second embodiment of the invention under based on SRVCC framework shown in Figure 2;
Fig. 5 carries out the method flow diagram that voice business continuity switches (switch to from the CS territory from the LTE/SAE network insertion and insert) for third embodiment of the invention under based on SRVCC framework shown in Figure 2.
Embodiment
Main thought of the present invention is, when switching to from CS territory access switching from the LTE/SAE network insertion IMS session, enhanced MSC is switched completed message by delayed delivery notice MME, postpones the purpose that the indication policy controlling system discharges corresponding IMS Session Resources to realize MME; Perhaps after MME receives that the LTE/SAE network insertion of enhanced MSC transmission is switched the message of finishing to the access of CS territory, postpone the indication policy controlling system and discharge corresponding IMS Session Resources; Perhaps enhanced MSC just sends the LTE/SAE network insertion to MME and inserts handoff completion message to the CS territory after confirming to have received territory handover success response.
Describe the present invention below in conjunction with drawings and Examples.
First embodiment:
Fig. 3 carries out the method flow diagram that voice business continuity switches (switch to from the CS territory from the LTE/SAE network insertion and insert) for first embodiment of the invention under based on SRVCC framework shown in Figure 2.
The core concept of present embodiment is: after enhanced MSC is received handoff completion message (MAP sends end signal message), MME switches completed message by the delayed delivery notice, postpones the purpose that the indication policy controlling system discharges corresponding IMS Session Resources to realize MME.As shown in Figure 3, this method may further comprise the steps:
301, UE sends measurement report to E-UTRAN after receiving the measurement request that LTE/SAE wireless net member E-UTRAN sends, comprise adjacent district information in the described measurement report;
302, E-UTRAN is according to the adjacent district information in the measurement report, and decision is initiated to switch, and therefore sends RELOCATION REQUEST message to MME;
303, after MME receives RELOCATION REQUEST message, according to the information that wherein comprises, send RELOCATION REQUEST message forward to enhanced MSC, sign STN and user's integrated services digital network (Integrated Service Digital Network is called for short ISDN) number is switched in the territory of carrying the user in this message;
Above-mentioned STN and ISDN number are information and the configuration of MME according to the user, acquire from the HSS of correspondence.
304, enhanced MSC sends MAP to MSC and prepares handoff request message;
305, MSC sends to switch to GERAN/UTRAN and requires request message, and GERAN/UTRAN returns to switch to MSC and requires acknowledgement message;
306, MSC returns MAP to enhanced MSC and prepares handover request ack message, carries Handover Number in this message, and this Handover Number is distributed by MSC;
307, enhanced MSC set up with MSC between circuit be connected.For example enhanced MSC sends the integrated digital service-user part signaling initial address message of (ISDN User Part is called for short ISUP) according to Handover Number to MSC, and MSC returns the Address Complete Message of ISUP to enhanced MSC;
It should be noted that if enhanced MSC and MSC merge to be provided with then above-mentioned steps 304,306 and 307 merges inner realization of network element device of setting at this.
308, enhanced MSC is initiated territory handoff request message to the SCC in IMS territory AS; Enhanced MSC by the IMS network MGCF and CSCF to the initial address message that SCC AS sends ISUP, carry STN and ISDN number in this message; ISDN number and STN are used to indicate SCC AS that the session of correspondence is switched to the CS territory at operation layer from the IMS network; SCC AS sends response message to enhanced MSC;
This step also can be that enhanced MSC directly sends SIP (Session InitialProtocol to SCC AS, initial session protocol) conversation request message, the telecommunications universal resource identifier (tel URI) of carrying STN in this message or being converted to by user's ISDN number; SCC AS returns SIP success message (200OK message) to enhanced MSC;
Enhanced MSC also can send to SCC AS with STN by trigger intelligent business, obtains routing number from SCC AS, uses routing number that message is directly sent to SCC AS then.
Enhanced MSC is by ISUP initial address message or SIP conversation request message in this step, and notice SCC AS need carry out voice business continuity and switch, and request SCC AS switches to CS territory at operation layer from the IMS network with respective session.
Set up the CS session Leg between enhanced MSC and the SCC AS this moment.
309, SCC AS upgrades far-end session Leg, it is linked to each other with CS session Leg, and timer T is set, and is used for source of release session Leg when timer expiry;
Timer T is set guarantees after whole switching is finished, source of release session Leg.
310, enhanced MSC is returned relocation response message forward to MME;
311, MME returns relocation response message to E-UTRAN;
312, E-UTRAN returns the reorientation command messages to UE;
313, UE switches to the GERAN/UTRAN network after receiving described reorientation command messages, sends to switch to GERAN/UTRAN and inserts message.
314, after GERAN/UTRAN detects switching, send change detection to message to MSC;
315, MSC sends MAP to enhanced MSC and handles access signaling message, and this message is used to notify the enhanced MSC user terminal to begin to insert from the CS territory;
316, UE sends handoff completion message to GERAN/UTRAN;
317, GERAN/UTRAN sends handoff completion message to MSC;
318, MSC sends MAP to enhanced MSC and sends end signal message, and notice enhanced MSC user terminal has switched to the CS territory, and enhanced MSC is known to switch according to this message and finished;
Be provided with if MSC and enhanced MSC merge, then enhanced MSC is received that the handoff completion message of step 317 is known to switch and is finished.
319, enhanced MSC is switched and is set up the required time (the territory handoff request message that comprises step 308 arrive SCC AS upgrades the far-end required time of session Leg in required time of SCC AS and the step 309) timer (for example can timer be set to 2 seconds), the overtime back of waiting timer execution in step 320 are set according to the territory;
320, after enhanced MSC receives that described UE switches the message of finishing (being that MAP sends end signal message) by the expression of objective network (being GERAN/UTRAN or GERAN/UTRAN and MSC) transmission, send PS to the CS handoff completion message to MME, MME returns PS to the CS switching authentic information;
321, MME receives above-mentioned PS behind the CS handoff completion message, and the indication policy controlling system discharges the bearing resource that is based upon the described session under the LTE/SAE network;
322, MSC is to enhanced MSC loopback ISUP response message (the ISUP initial address message of corresponding step 307);
So far, Dui Ying IMS session has been finished to switch to from the CS territory from the LTE/SAE network insertion and has been inserted.
Second embodiment:
Fig. 4 carries out the method flow diagram that voice business continuity switches (switch to from the CS territory from the LTE/SAE network insertion and insert) for second embodiment of the invention under based on SRVCC framework shown in Figure 2.
The core concept of present embodiment is: when MME receives PS behind the CS handoff completion message, postpone the indication policy controlling system and discharge the IMS Session Resources.As shown in Figure 4, this method may further comprise the steps:
401, UE sends measurement report to E-UTRAN after receiving the measurement request that LTE/SAE wireless net member E-UTRAN sends, comprise adjacent district information in the described measurement report;
402, E-UTRAN is according to the adjacent district information in the measurement report, and decision is initiated to switch, and therefore sends RELOCATION REQUEST message to MME;
403, after MME receives RELOCATION REQUEST message, according to the information that wherein comprises, send RELOCATION REQUEST message forward to enhanced MSC, sign STN and user's integrated services digital network (Integrated Service Digital Network is called for short ISDN) number is switched in the territory of carrying the user in this message;
Above-mentioned STN and ISDN number are information and the configuration of MME according to the user, acquire from the HSS of correspondence.
404, enhanced MSC sends MAP to MSC and prepares handoff request message;
405, MSC sends to switch to GERAN/UTRAN and requires request message, and GERAN/UTRAN returns to switch to MSC and requires acknowledgement message;
406, MSC returns MAP to enhanced MSC and prepares handover request ack message, carries Handover Number in this message, and this Handover Number is distributed by MSC;
407, enhanced MSC set up with MSC between circuit be connected.For example enhanced MSC sends the integrated digital service-user part signaling initial address message of (ISDN User Part is called for short ISUP) according to Handover Number to MSC, and MSC returns the Address Complete Message of ISUP to enhanced MSC;
It should be noted that if enhanced MSC and MSC merge to be provided with then above-mentioned steps 404,406 and 407 merges inner realization of network element device of setting at this.
408, enhanced MSC is initiated territory handoff request message to the SCC in IMS territory AS; Enhanced MSC by the IMS network MGCF and CSCF to the initial address message that SCC AS sends ISUP, carry STN and ISDN number in this message; ISDN number and STN are used to indicate SCC AS that the session of correspondence is switched to the CS territory at operation layer from the IMS network; SCC AS sends response message to enhanced MSC;
This step also can be that enhanced MSC directly sends SIP (Session InitialProtocol to SCC AS, initial session protocol) conversation request message, the telecommunications universal resource identifier (tel URI) of carrying STN in this message or being converted to by user's ISDN number; SCC AS returns SIP success message (200OK message) to enhanced MSC;
Enhanced MSC also can send to SCC AS with STN by trigger intelligent business, obtains routing number from SCC AS, uses routing number that message is directly sent to SCC AS then.
Enhanced MSC is by ISUP initial address message or SIP conversation request message in this step, and notice SCC AS need carry out voice business continuity and switch, and request SCC AS switches to CS territory at operation layer from the IMS network with respective session.
Set up the CS session Leg between enhanced MSC and the SCC AS this moment.
409, SCC AS upgrades far-end session Leg, it is linked to each other with CS session Leg, and timer T is set, and is used for source of release session Leg when timer expiry;
Timer T is set guarantees after whole switching is finished, source of release session Leg.
410, enhanced MSC is returned relocation response message forward to MME;
411, MME returns relocation response message to E-UTRAN;
412, E-UTRAN returns the reorientation command messages to UE;
413, UE switches to the GERAN/UTRAN network after receiving described reorientation command messages, sends to switch to GERAN/UTRAN and inserts message.
414, after GERAN/UTRAN detects switching, send change detection to message to MSC;
415, MSC sends MAP to enhanced MSC and handles access signaling message, and this message is used to notify the enhanced MSC user terminal to begin to insert from the CS territory;
416, UE sends handoff completion message to GERAN/UTRAN;
417, GERAN/UTRAN sends handoff completion message to MSC;
418, MSC sends MAP to enhanced MSC and sends end signal message, and notice enhanced MSC user terminal has switched to the CS territory, and enhanced MSC is known to switch according to this message and finished;
Be provided with if MSC and enhanced MSC merge, then enhanced MSC is received that the handoff completion message of step 417 is known to switch and is finished.
419, after enhanced MSC receives that described UE switches the message of finishing (being that MAP sends end signal message) by the expression of objective network (being GERAN/UTRAN or GERAN/UTRAN and MSC) transmission, send PS to the CS handoff completion message to MME, MME returns PS to the CS switching authentic information;
420, MME is provided with timer, waits for execution in step 421 behind this timer expiry;
421, MME indication policy controlling system discharges the bearing resource that is based upon the described session under the LTE/SAE network;
422, MSC is to enhanced MSC loopback ISUP response message (the ISUP initial address message of corresponding step 407);
So far, Dui Ying IMS session has been finished to switch to from the CS territory from the LTE/SAE network insertion and has been inserted.
The 3rd embodiment:
Fig. 5 carries out the method flow diagram that voice business continuity switches (switch to from the CS territory from the LTE/SAE network insertion and insert) for third embodiment of the invention under based on SRVCC framework shown in Figure 2.
The core concept of present embodiment is: after receiving handoff completion message (MAP sends end signal message), enhanced MSC judges whether to receive that the territory handover success that IMS territory (SCC AS) sends responds, and receives that handover success response back, territory sends PS to the CS handoff completion message to MME.As shown in Figure 5, this method may further comprise the steps:
501, UE sends measurement report to E-UTRAN after receiving the measurement request that LTE/SAE wireless net member E-UTRAN sends, comprise adjacent district information in the described measurement report;
502, E-UTRAN is according to the adjacent district information in the measurement report, and decision is initiated to switch, and therefore sends RELOCATION REQUEST message to MME;
503, after MME receives RELOCATION REQUEST message, according to the information that wherein comprises, send RELOCATION REQUEST message forward to enhanced MSC, sign STN and user's integrated services digital network (Integrated Service Digital Network is called for short ISDN) number is switched in the territory of carrying the user in this message;
Above-mentioned STN and ISDN number are information and the configuration of MME according to the user, acquire from the HSS of correspondence.
504, enhanced MSC sends MAP to MSC and prepares handoff request message;
505, MSC sends to switch to GERAN/UTRAN and requires request message, and GERAN/UTRAN returns to switch to MSC and requires acknowledgement message;
506, MSC returns MAP to enhanced MSC and prepares handover request ack message, carries Handover Number in this message, and this Handover Number is distributed by MSC;
507, enhanced MSC set up with MSC between circuit be connected.For example enhanced MSC sends the integrated digital service-user part signaling initial address message of (ISDN User Part is called for short ISUP) according to Handover Number to MSC, and MSC returns the Address Complete Message of ISUP to enhanced MSC;
It should be noted that if enhanced MSC and MSC merge to be provided with then above-mentioned steps 504,506 and 507 merges inner realization of network element device of setting at this.
508, enhanced MSC is initiated territory handoff request message to the SCC in IMS territory AS; Enhanced MSC by the IMS network MGCF and CSCF to the initial address message that SCC AS sends ISUP, carry STN and ISDN number in this message; ISDN number and STN are used to indicate SCC AS that the session of correspondence is switched to the CS territory at operation layer from the IMS network; SCC AS sends response message to enhanced MSC;
This step also can be that enhanced MSC directly sends SIP (Session InitialProtocol to SCC AS, initial session protocol) conversation request message, the telecommunications universal resource identifier (tel URI) of carrying STN in this message or being converted to by user's ISDN number; SCC AS returns SIP success message (200OK message) to enhanced MSC;
Enhanced MSC also can send to SCC AS with STN by trigger intelligent business, obtains routing number from SCC AS, uses routing number that message is directly sent to SCC AS then.
Enhanced MSC is by ISUP initial address message or SIP conversation request message in this step, and notice SCC AS need carry out voice business continuity and switch, and request SCC AS switches to CS territory at operation layer from the IMS network with respective session.
Set up the CS session Leg between enhanced MSC and the SCC AS this moment.
509, SCC AS upgrades far-end session Leg, it is linked to each other with CS session Leg, and timer T is set, and is used for source of release session Leg when timer expiry;
Timer T is set guarantees after whole switching is finished, source of release session Leg.
510, enhanced MSC is returned relocation response message forward to MME;
511, MME returns relocation response message to E-UTRAN;
512, E-UTRAN returns the reorientation command messages to UE;
513, UE switches to the GERAN/UTRAN network after receiving described reorientation command messages, sends to switch to GERAN/UTRAN and inserts message.
514, after GERAN/UTRAN detects switching, send change detection to message to MSC;
515, MSC sends MAP to enhanced MSC and handles access signaling message, and this message is used to notify the enhanced MSC user terminal to begin to insert from the CS territory;
516, UE sends handoff completion message to GERAN/UTRAN;
517, GERAN/UTRAN sends handoff completion message to MSC;
518, MSC sends MAP to enhanced MSC and sends end signal message, and notice enhanced MSC user terminal has switched to the CS territory, and enhanced MSC is known to switch according to this message and finished;
Be provided with if MSC and enhanced MSC merge, then enhanced MSC is received that the handoff completion message of step 517 is known to switch and is finished.
519, the SCC AS in IMS territory sends territory handover success response to enhanced MSC;
The territory handover success response that it should be noted that this step may send to enhanced MSC in any time between step 515 and 522, also may send to enhanced MSC after step 522.
Handover success response in above-mentioned territory may be Address Complete Message or the response message of ISUP according to the interface difference that adopts in the step 508, or 180 (rings), 183 (session is carried out) of SIP, 200 (success response) message.
520, enhanced MSC sends PS to the CS handoff completion message to MME after acknowledging receipt of territory handover success response, and MME returns PS to the CS switching authentic information;
521, MME indication policy controlling system discharges the bearing resource that is based upon the described session under the LTE/SAE network;
522, MSC is to enhanced MSC loopback ISUP response message (the ISUP initial address message of corresponding step 507);
So far, Dui Ying IMS session has been finished to switch to from the CS territory from the LTE/SAE network insertion and has been inserted.
Claims (10)
1. a voice business continuity switching method is characterized in that, this method comprises:
Carrying out the voice business continuity switching, when Long Term Evolution/System Architecture Evolution LTE/SAE network insertion switched to circuit commutative field CS territory and inserts, UE sent handoff completion message by the target access device in CS territory to strengthening moving exchanging center MSC with the IP Multimedia System IMS session of user equipment (UE);
After receiving described handoff completion message, enhanced MSC sends to Mobility Management Entity MME and to be used to represent that described IMS session finished the message that switches to the access of CS territory after confirming to have received the territory handover success response that centralized control is professional and session service application server for continuity SCC AS sends;
After receiving the described message of enhanced MSC transmission, MME sends the Indication message that is used to discharge the bearing resource that is based upon the described IMS session under the LTE/SAE network.
2. the method for claim 1 is characterized in that,
The handover success response of described territory is: the Address Complete Message of integrated digital service-user part signaling ISUP or the response message of ISUP.
3. the method for claim 1 is characterized in that,
The handover success response of described territory is: the success response message of message or SIP is carried out in the ALERTING message of initial session protocol SIP or the session of SIP.
4. the method for claim 1 is characterized in that,
After receiving the described message of enhanced MSC transmission, MME sends described Indication message to policy controlling system.
5. a voice business continuity switching method is characterized in that, this method comprises:
Switch carrying out voice business continuity, when the LTE/SAE network insertion switched to the CS territory and inserts, UE sent handoff completion message by the target access device in CS territory to enhanced MSC with the IMS session of UE;
After receiving described handoff completion message and postponing predefined time span, enhanced MSC sends to MME and is used to represent that described IMS session has been finished switches to the message that the CS territory is inserted;
After receiving the described message of enhanced MSC transmission, MME sends the Indication message that is used to discharge the bearing resource that is based upon the described IMS session under the LTE/SAE network.
6. method as claimed in claim 5 is characterized in that,
After receiving described handoff completion message, enhanced MSC is the operation that the timer of described predefined time span is realized the described Indication message of delayed delivery by starting a length.
7. as claim 5 or 6 described methods, it is characterized in that,
After receiving the described message of enhanced MSC transmission, MME sends described Indication message to policy controlling system.
8. a voice business continuity switching method is characterized in that, this method comprises:
Switch carrying out voice business continuity, when the LTE/SAE network insertion switched to the CS territory and inserts, UE sent handoff completion message by the target access device in CS territory to enhanced MSC with the IMS session of UE;
After receiving described handoff completion message, enhanced MSC sends to MME and is used to represent that described IMS session has been finished switches to the message that the CS territory is inserted;
After receiving the described message of enhanced MSC transmission and postponing predefined time span, MME sends the Indication message that is used to discharge the bearing resource that is based upon the described IMS session under the LTE/SAE network.
9. method as claimed in claim 8 is characterized in that,
After receiving the described message that enhanced MSC sends, MME is the operation that the timer of described predefined time span is realized the described Indication message of delayed delivery by starting a length.
10. method as claimed in claim 8 or 9 is characterized in that,
After receiving the described message of enhanced MSC transmission, MME sends described Indication message to policy controlling system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910128404.8A CN101835223B (en) | 2009-03-12 | 2009-03-12 | Voice business continuity switching method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910128404.8A CN101835223B (en) | 2009-03-12 | 2009-03-12 | Voice business continuity switching method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101835223A true CN101835223A (en) | 2010-09-15 |
| CN101835223B CN101835223B (en) | 2015-05-13 |
Family
ID=42719105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910128404.8A Active CN101835223B (en) | 2009-03-12 | 2009-03-12 | Voice business continuity switching method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101835223B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102131263A (en) * | 2011-03-29 | 2011-07-20 | 中兴通讯股份有限公司 | Ringing state domain switching method, system and device |
| WO2015184704A1 (en) * | 2014-06-06 | 2015-12-10 | 中兴通讯股份有限公司 | Network switching processing method and device |
| WO2016000134A1 (en) * | 2014-06-30 | 2016-01-07 | 华为技术有限公司 | Voice service switching method and device in single radio voice call continuity |
| CN105659576A (en) * | 2013-09-13 | 2016-06-08 | 微软技术许可有限责任公司 | Voice call continuity in hybrid networks |
| CN108616940A (en) * | 2016-12-31 | 2018-10-02 | 中国移动通信集团北京有限公司 | A kind of 2G/3G Internet resources method for releasing and mobile communications network |
| CN108966299A (en) * | 2014-12-08 | 2018-12-07 | 华为技术有限公司 | The method and apparatus of voice switching |
| CN110121896A (en) * | 2016-12-29 | 2019-08-13 | 华为技术有限公司 | A kind of communication means and mobile terminal |
| CN110881143A (en) * | 2018-09-05 | 2020-03-13 | 中兴通讯股份有限公司 | Set top box management method, device and equipment and computer readable storage medium |
| CN113507732A (en) * | 2017-06-19 | 2021-10-15 | 三星电子株式会社 | Method and apparatus for network virtualization and session management |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101227733A (en) * | 2008-02-05 | 2008-07-23 | 中兴通讯股份有限公司 | Single wireless channel voice business continuity field switching method |
| CN101227677A (en) * | 2008-02-05 | 2008-07-23 | 中兴通讯股份有限公司 | Single wireless channel voice business continuity field switching method |
| CN101291541A (en) * | 2008-06-04 | 2008-10-22 | 华为技术有限公司 | Method, network element and system for evolution network to access circuit domain service |
| US20080291874A1 (en) * | 2007-03-23 | 2008-11-27 | Samsung Electronics Co., Ltd. | Handover apparatus and method in a heterogeneous wireless communication system |
-
2009
- 2009-03-12 CN CN200910128404.8A patent/CN101835223B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080291874A1 (en) * | 2007-03-23 | 2008-11-27 | Samsung Electronics Co., Ltd. | Handover apparatus and method in a heterogeneous wireless communication system |
| CN101227733A (en) * | 2008-02-05 | 2008-07-23 | 中兴通讯股份有限公司 | Single wireless channel voice business continuity field switching method |
| CN101227677A (en) * | 2008-02-05 | 2008-07-23 | 中兴通讯股份有限公司 | Single wireless channel voice business continuity field switching method |
| CN101291541A (en) * | 2008-06-04 | 2008-10-22 | 华为技术有限公司 | Method, network element and system for evolution network to access circuit domain service |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102131263B (en) * | 2011-03-29 | 2016-08-03 | 中兴通讯股份有限公司 | The method, system and device of ringing-state territory switching |
| WO2012129979A1 (en) * | 2011-03-29 | 2012-10-04 | 中兴通讯股份有限公司 | Method, system, and device for ring state domain switchover |
| CN102131263A (en) * | 2011-03-29 | 2011-07-20 | 中兴通讯股份有限公司 | Ringing state domain switching method, system and device |
| CN105659576B (en) * | 2013-09-13 | 2019-03-19 | 微软技术许可有限责任公司 | The method of continuous voice call in hybrid network |
| CN105659576A (en) * | 2013-09-13 | 2016-06-08 | 微软技术许可有限责任公司 | Voice call continuity in hybrid networks |
| CN105282769A (en) * | 2014-06-06 | 2016-01-27 | 中兴通讯股份有限公司 | Network switching processing method and device |
| WO2015184704A1 (en) * | 2014-06-06 | 2015-12-10 | 中兴通讯股份有限公司 | Network switching processing method and device |
| US10805843B2 (en) | 2014-06-06 | 2020-10-13 | Zte Corporation | Network switching processing method and device |
| WO2016000134A1 (en) * | 2014-06-30 | 2016-01-07 | 华为技术有限公司 | Voice service switching method and device in single radio voice call continuity |
| CN106233781A (en) * | 2014-06-30 | 2016-12-14 | 华为技术有限公司 | The method and apparatus of speech business switching in Single Radio Voice Call Continuity |
| US10397834B2 (en) | 2014-06-30 | 2019-08-27 | Huawei Technologies Co., Ltd. | Voice service handover method and apparatus in single radio voice call continuity |
| CN108966299A (en) * | 2014-12-08 | 2018-12-07 | 华为技术有限公司 | The method and apparatus of voice switching |
| US11240721B2 (en) | 2014-12-08 | 2022-02-01 | Huawei Technologies Co., Ltd. | Voice switching method and apparatus |
| CN110121896B (en) * | 2016-12-29 | 2021-10-26 | 华为技术有限公司 | Communication method and mobile terminal |
| CN110121896A (en) * | 2016-12-29 | 2019-08-13 | 华为技术有限公司 | A kind of communication means and mobile terminal |
| US10945170B2 (en) | 2016-12-29 | 2021-03-09 | Huawei Technologies Co., Ltd. | Communication method and mobile terminal |
| CN108616940A (en) * | 2016-12-31 | 2018-10-02 | 中国移动通信集团北京有限公司 | A kind of 2G/3G Internet resources method for releasing and mobile communications network |
| CN113507732A (en) * | 2017-06-19 | 2021-10-15 | 三星电子株式会社 | Method and apparatus for network virtualization and session management |
| CN113507732B (en) * | 2017-06-19 | 2022-05-03 | 三星电子株式会社 | Method and apparatus for network virtualization and session management |
| US11564079B2 (en) | 2017-06-19 | 2023-01-24 | Samsung Electronics Co., Ltd | Method and apparatus for network virtualization and session management |
| US12048060B2 (en) | 2017-06-19 | 2024-07-23 | Samsung Electronics Co., Ltd | Method and apparatus for network virtualization and session management |
| CN110881143A (en) * | 2018-09-05 | 2020-03-13 | 中兴通讯股份有限公司 | Set top box management method, device and equipment and computer readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101835223B (en) | 2015-05-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101668273B (en) | Emergency service switching method | |
| CN101835223B (en) | Voice business continuity switching method | |
| US8180347B2 (en) | Domain transferring method for single radio voice call continuity | |
| CN101227647B (en) | Switching method of keeping multimedia conversation continuity business | |
| CN101448287B (en) | Method for realizing switching of user equipment crossing access network in activated state | |
| CN101227733B (en) | Single wireless channel voice business continuity field switching method | |
| CN101577890B (en) | Method for transferring emergency service sessions, and emergency service system | |
| CN101577951B (en) | Method for processing voice service continuity switching failure | |
| CN101577878B (en) | Method for processing voice service continuity switching failure | |
| CN101472326B (en) | Method and terminal for implementing voice business switch between different systems | |
| JP5645329B2 (en) | Method and system for handing over circuit switched domain service to packet switched domain | |
| CN101800960B (en) | Method for transferring emergent service session and emergent service system | |
| CN101459940B (en) | Domain switching method for continuity of single wireless channel voice service | |
| EP2485530B1 (en) | System and method for switching ringing state session with customized alerting tone | |
| CN101459891B (en) | Switching method for single wireless channel voice service continuity | |
| CN102238672A (en) | Method and system for realizing rSRVCC (reverse signal radio voice call continuity) | |
| CN102238673A (en) | Reverse single-standby service continuity realization method and system | |
| CN102006269B (en) | Synchronization method and system for multi-session capability of IP multimedia subsystem | |
| CN101459939A (en) | Domain switching method | |
| CN101472302B (en) | Method and device for switching business | |
| CN101651896B (en) | Method for associating multimedia sessions | |
| CN101945365A (en) | Method and system for switching emergency session | |
| CN101325792B (en) | Method for switching control route of IP multimedia subsystem centralized business conversation | |
| CN103200626A (en) | Modified reverse-direction one-standby service continuity implementation method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |