CN1784073A - Switching method for keeping continuous communication in mobile communication system - Google Patents
Switching method for keeping continuous communication in mobile communication system Download PDFInfo
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Abstract
This invention discloses a switching method for holding continuous communication in mobile communication system. It contains the extended switch package reporting the switched new terminal to continue the original terminal channel to keep communication continuity, wherein the synchronous sound channel and IWF channel in digital service defining respectively different channel signal for loading correlation parameter in switch package, the channel inheritance and continuous communication cab be realized by the change of network topology structure among content terminals.
Description
Technical field
The present invention relates to the changing method of mobile communication system, particularly keep the changing method of continuous communiction in the mobile communication system.
Background technology
Along with advancing by leaps and bounds of the communication technology, people are also more and more higher for the expectation and the requirement of personal communication, so mobile operator needs special concern user interface, quality of service etc. directly to influence the aspect that the user uses the effect of mobile service.The third generation (3rd Generation, abbreviation " 3G ") characteristics such as the high bandwidth of mobile communication system, multi-service, high-quality are attracting mobile consumption market greatly, but even if some problems that exist in the 3G technology do not solve restricted market expansion to a certain extent, and the development of operation affairs is moved in influence.
Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access, abbreviation " WCDMA ") mobile communication system is by core net (Core Net, abbreviation " CN "), universal mobile telecommunications system grounding wireless access network (UMTS Terrestrial Radio Access Network, be called for short " UTRAN ") and subscriber equipment (User Equipment is called for short " UE ") composition.UTRAN and UE adopt the WCDMA wireless access technology.The WCDMA network is followed following principle when design: wireless access network separates with the core net function as far as possible.Promptly the management function of Radio Resource is concentrated on wireless access network and finish, and carry out in core net with professional and application related functions.
The basic characteristics of the WCDMA network architecture are that core net is from the global system for mobile communications progressively evolution and the transition of core net of (GlobalSystem for mobile Communication is called for short " GSM ").Wireless access network then is to change revolutionaryly, and it will be different from the wireless access network of GSM fully; The business of complete compatible GSM then aspect professional has demonstrated fully professional continuity
In the later network architecture of the R4 of WCDMA, core net no longer is confined to Circuit-switched mode, can select the mode of packet switching, such as with asynchronous transfer mode (Asynchronous TransferMode, abbreviation " ATM "), Internet protocol (Internet Protocol is called for short " IP ") is as bearing technology.Packet switching has not only improved network transmission speed, has enriched the Network kind, and can make things convenient for network management, the network configuration design.Call out control and separating that carrying is controlled in order to realize simultaneously, (the Mobile Switching Center of mobile switching centre, abbreviation " MSC ") is split into MSC server (G MSC Server) and media gateway (Media Gateway, be called for short " MGW "), wherein (G) MSC Server finishes and calls out control, mobile management function, MGW finishes carrying control and transfer function, and the interface between the two is called Mc interface, uses H.248 as bearer control protocol.Pass through radio network controller (Radio Network Controller between core net and the Access Network, be called for short " RNC ") and the Iu interface communication of MSC, be control channel between RNC and the MSC Server, RNC accepts the signaling control of MSC Server, be data channel between RNC and the MGW simultaneously, the data of RNC converge and shunt by MGW.In the wireless access side, when UE by cell base station node (NodeB) wireless access, and control by RNC.
Core net is also finished the function with other network integrations, wherein safeguards Signalling exchange interface between mobile network and other networks by MSC Server, is realized functions such as data forwarding, passage foundation by MGW.Fig. 1 shows call service group's pessimistic concurrency control that the mobile subscriber calls out fixed-line subscriber.MSC Server finishes RNC to public service telecommunications network (Public Service Telecommunication Network, abbreviation " PSTN ") controlling links and maintenance, then there is context (Context) to set up RNC among the MGW to the connection between the PSTN, terminal (Termination) T1 accepts the RNC signal, T2 accepts the PSTN signal, realizes the modulation coupling of signal etc. in context.Call connection process from mobile subscriber UE to the PSTN fixed-line subscriber is described below:
At first, after mobile UE finishes wireless access, send message by air interface and make a call (Setup), carry called number in the message;
Secondly, this signaling passes to MSC Server by RNC, MSC Server analyzing called number, discovery is the outbound call to PSTN, then send initial address message (Initial AddressMessage to PSTN, be called for short " IAM "), IAM message is the originated call message of telecommunications network, so MSC Server must possess and other networks between the function of signaling interface;
Simultaneously, MSC Server sends adding (ADD) instruction (H.248 message) to MGW, and control MGW adds two terminals in a context, called after T1, T2, and wherein T1 corresponds to the land circuit of RNC, and T2 corresponds to the interoffice junction circuit of PSTN; And issue Assignment Command to RNC, finish the foundation of air traffic channel;
Subsequently, MSC Server will send ring-back message (Alerting) to UE after receiving the complete message in address that PSTN returns (Address CompleteMessage is called for short " ACM "); After receiving the answer message (ANnswer Message is called for short " ANM ") of PSTN, will send connection (Connect) message to UE, both sides enter talking state.
As seen finish UE in the connection procedure between the PSTN user under the control of the signaling of MSC Server, MSC Server has realized that interactive function and the interface channel between the different signaling systems of both sides set up process, and MGW has realized the function that coupling connects.
In fact, the data service that provides for circuit domain, if the mobile subscriber is by Public Land Mobile Nerwork (Public Land Mobile Network, be called for short " PLMN ") with the network of other type, carry out intercommunication as PSTN or integrated services digital network (Integrated Services Digital Network is called for short " ISDN ") user, then need to insert interactive function (InterWorking Function, be called for short " IWF "), finish functions such as rate adapted, modulation.According to 3G (Third Generation) Moblie partner program (3rd Generation Partnership Project, be called for short " 3GPP ") technical specification TS29.232V.4.8.0, MSC Server is in being handed down to the adding of MGW (ADD) order, need issue the BC parameter of PLMN to the terminal T1 of RNC side, need issue the BC parameter of PSTN/ISDN to PSTN/ISDN side T2, MGW knows that in view of the above this is that data are called out, and the corresponding mobile side of T1, the corresponding fixation side of T2, thereby insert an IWF example automatically, IWF is connected with T1, T2 respectively, finishes passage and sets up.
When the PSTN side is sent offhook message (ANM), MSC Server sends modification (MODIFY) instruction (H.248 message) to MGW, indication activates IWF, according to 3GPP TS 29.232V.4.8.0, MGW issues to activate upper-layer protocol signal (Activate the higher layer protocol on T1/T2, be called for short " actprot "), and require detection protocol negotiation result (Protocol Negotiation Result is called for short " protres ") incident.This moment is in mobile side, promptly with being connected of T1, IWF can carry out radio link protocol (Radio Link Protocol is called for short " RLP ") synchronously and the negotiation of peer-peer protocol (Point-to-Point Protocal, abbreviation " PPP ").In fixation side, promptly with being connected of T2, IWF carries out common modulation to be consulted.MGW reports the protres incident to MSC Server, the indication negotiation result.After negotiation is finished, just can carry out data transmit-receive between travelling carriage and the fixed-line subscriber.
At mobile Access Network, UE moves in the sub-district covering domain and inserts NodeB, there is the switching problem between the different districts, promptly when UE when a sub-district enters another sub-district, perhaps owing to reasons such as radio signal quality or Network Load Balances, the mobile subscriber switches, and the NodeB that communicates with also changes, even RNC also changes.In the handoff procedure of base station, communication link RNC side need be reset.This brings discontinuity for the communication of well afoot, such as ongoing playback of system or user's data business.
If local exchange need carry out playback operation to the user, for example called number mistake failure that causes continuing, MSC Server sends the playback indication with the terminal in MGW.The playback content can be divided into two kinds, and a kind of do not have a clear and definite beginning flag, and the user can begin audition from the optional position, and for example the busy tone of " pouting ... pout ... pout ... " is called asynchronous announcement; Another kind has clear and definite beginning flag, user's audition that need start anew, and the voice of for example prerecording " number that you dial does not exist, and dials after please investigating again " are called sync tone.According to standard H.248, playback issues a signal (Signal) and realizes on terminal.This is under normal circumstances no problem, but when the user switches, but may cause playback to be interrupted.
As the first step of handoff procedure, according to 3GPP TS 23.205 V4.7.0, after UE switches, MSC Server will receive the handoff request that the RNC side is sent, at this moment should add (ADD) new terminal in the context of MGW, such as called after T1 ', it links to each other with new land circuit.After UE switches on the new air traffic channel, new NodeB/RNC will detect user's access, and MSC Server promptly notifies former RNC call release related resource after obtaining report, and the former terminal T1 on the context of deletion MGW.And if in handoff procedure, MGW is carrying out playback to the user, a signal is arranged on the T1 promptly, after then the user switches to new air traffic channel, be that land circuit by T1 ' correspondence inserts, the playback on the T1 can not be sent to the user like this, will stop suddenly user's playback.
Same, when carrying out data communication for the mobile subscriber, such as linking to each other with fixed network by IWF, if the mobile subscriber switches, as previously mentioned, MSC Server should add (ADD) new terminal T1 ' in the context of MGW after receiving handoff request, link to each other with new land circuit.On this T1 ', issue the BC parameter identical, but because original IWF is based on and works on the negotiation result with original mobile lateral terminal and fixation side terminal, IWF links to each other with T1 before switching, will link to each other with T1 ' in switching with T1.New terminal is not directly inherited IWF and is communicated, and then IWF carries out new negotiation with needs, obtains new terminal and continues with the negotiation result of fixation side to communicate by letter.This process must cause the interruption, discontinuous of communication service.
The situation that the playback that causes during for switching is interrupted, a solution are that MSC Server also repeats the signal down on new terminal T1 ' after switching is finished, and the system that makes continues user's playback.For asynchronous announcement, owing to there is not clear and definite beginning flag, no matter the user is from when beginning to listen less than influence; And for sync tone, to cause the discontinuous of playback like this, for example play " number that you dial does not exist; dial after please investigating again " this prompting, switching has taken place when being put into " no " word, the user listens playback to be converted to from T1 ' from T1 and listens playback, T ' then restarts playback, therefore the actual voice of hearing just may be " number that you dial not your number dialled do not exist, and dials after please investigating again ", the inconvenient even misunderstanding that discontinuous sync tone causes the user to understand.
The user switches when playback, if MSC Server does not repeat the signal under the new terminal after the switching, then will cause user's audition to stop suddenly; If the new terminal of MSC Server after switching repeats the signal up and down, the voice that the user hears are discontinuous segment combinations, cause playback discontinuous, and sound effect is extremely undesirable, especially when playing sync tone.
And, when particularly carrying out inter-net communication, make data service interrupt because IWF holds consultation again by IWF for mobile subscriber's communication service.Do not make the new terminal after switching inherit original IWF if do not take measures, then data service will be interrupted, and finish the negotiation of mobile side and fixed network side again until new IWF.
In actual applications, there is following problem in such scheme: it is discontinuous to cause when the user is switched communicating by letter, and playback interrupts causing user interface to worsen, and perhaps data service is interrupted and reduction efficiency of transmission and service quality.
Cause the main cause of this situation to be, switch when taking place, new terminal is not inherited the passage of former terminal, communicates and adopt again or consult new passage.
Summary of the invention
In view of this, main purpose of the present invention is to provide the changing method that keeps continuous communiction in a kind of mobile communication system, makes that communication is not interrupted when switching generation, keeps the continuity of playback and data service.
For achieving the above object, the invention provides the changing method that keeps continuous communiction in a kind of mobile communication system, comprise following steps:
A is when switching generation, and the Mobile Switching Center Server transmitting order to lower levels is set up new terminal in the context of media gateway;
The described new terminal of B is inherited the passage of former terminal and is used this passage to continue communication.
Wherein, described passage is the sync tone passage, is used for system to user's playback.
Described passage is an interactive function example passage, is used for data service communication.
Described step B also comprises following substep,
Described Mobile Switching Center Server issues to described media gateway and switches bag;
Described media gateway is transferred to described new terminal with described passage from described former terminal according to described switching bag institute beared information;
Wherein said switching bag is used to carry the signal of taking over described passage.
Described switching bag comprises takes over the sync tone channel signal, described adapter sync tone channel signal is used to indicate described new terminal to take over the described sync tone passage of described former terminal, described adapter sync tone channel signal comprises the initial terminal identification parameter, is used for specifying described former terminal at described context.
The handling process of described switching bag comprises following steps,
System is in user's playback process, described Mobile Switching Center Server is after receiving handoff request, set up described new terminal in described media gateway, and the described new terminal in described media gateway issues described switching bag, it is described adapter sync tone channel signal that described switching bag comprises signal;
Described media gateway judges on the specified terminal of the entrained described initial terminal identification parameter of described adapter sync tone channel signal whether have described sync tone passage, and be in the same context with described new terminal, if, then described sync tone passage is transferred to described new terminal, otherwise, return mistake to described Mobile Switching Center Server.
Described switching bag comprises takes over the interactive function example signal, described adapter interactive function example signal is used to indicate described new terminal to take over the described interactive function example passage of described former terminal, described adapter interactive function example signal comprises described initial terminal identification parameter, is used for specifying described former terminal at described context.
The handling process of described switching bag comprises following steps,
In the data service communication process, described Mobile Switching Center Server is after receiving handoff request, set up described new terminal in described media gateway, and issue described switching bag to described new terminal, it is described adapter interactive function example signal that described switching bag comprises signal;
Described media gateway judges on the specified terminal of the entrained described initial terminal identification parameter of described adapter interactive function example signal whether have described interactive function example passage, and be in the same context with described new terminal, if, then described interactive function example passage is transferred to described new terminal, otherwise, return mistake to described Mobile Switching Center Server.
Described step B also comprises following substep,
B1 by the changes of topology structure between the terminal described in the described context, realizes that described passage transfers to described new terminal from described former terminal when switch taking place.
Described step B1 also comprises following substep:
System sets up virtual terminal in described context when user's playback, described virtual terminal is accepted the playback signal, and the unidirectional topological structure from described virtual terminal to described former terminal is set, by described virtual terminal by described former terminal to user's playback;
When switching generation, described Mobile Switching Center Server transmitting order to lower levels, in described context, set up described new terminal, and set described virtual terminal to the unidirectional topological structure of described new terminal, by described virtual terminal simultaneously by described former terminal and described new terminal playback;
After finishing switching, discharge the resource of described former terminal.
Described step B1 also comprises following substep:
In the data service communication process, set the two-way topological structure between described former terminal and the passage opposite side terminal in the described context, communicate;
When switching generation, described Mobile Switching Center Server transmitting order to lower levels, in described context, set up described new terminal, and set the unidirectional topological structure of described passage opposite side terminal to described new terminal, keep the two-way topological structure between described former terminal and the described passage opposite side terminal simultaneously;
After described media gateway detects the variation of described network topology structure, described interactive function example passage is transferred to described new terminal from described former terminal, and set the unidirectional topological structure of described passage opposite side terminal to described former terminal, set the two-way topological structure between described new terminal and the described passage opposite side terminal;
After finishing switching, discharge the resource of described former terminal.
Described method also comprises following steps:
Described Mobile Switching Center Server judges whether once to issue event request to described former terminal, if then issue this event request again to described new terminal;
After finishing switching, discharge the resource of described former terminal.
By relatively finding, the main distinction of technical scheme of the present invention and prior art is, the present invention inherits the passage of former terminal by new terminal in the switching bag notice switching back context of expansion, make new terminal proceed communication by identical passage, thereby maintenance communication continuity, wherein, in switching bag, define different adapter channel signals respectively and be used to carry relevant parameter for sync tone passage in the playback process and IWF example passage during data service is communicated by letter; Perhaps realize the succession and the continuous communiction of passage by the variation of the network topology structure between the terminal in the context, wherein pass through to increase virtual terminal for the playback process, be used for when switching, realizing the continuous of sync tone to new terminal and former terminal playback simultaneously, and detect the generation of switching by terminal room changes of topology structure in the context for data service communication, thereby carry out of the IWF example passage transfer of former terminal, thereby guarantee the continuity of data service to new terminal.
Difference on this technical scheme, brought comparatively significantly beneficial effect, promptly switching bag or the network topology structure by expansion changes synchronous playback of realization and data service communication continuity, problems such as the sync tone playback interruption that switching causes, data service interruption have been solved, improve the friendly degree of user interface, help broaden business market.Solved and switched the problem that causes, improved efficiency of transmission, improved service quality.
Description of drawings
Fig. 1 is the calling networking schematic diagram that the mobile subscriber calls out fixed-line subscriber;
Fig. 2 is according to an embodiment of the invention by switching the flow chart that bag keeps the changing method of continuous communiction;
Fig. 3 is the variation schematic diagram that terminal connects in the context in the adapter sync tone passage process according to an embodiment of the invention;
Fig. 4 is the variation schematic diagram that terminal and IWF example connect in the context in the adapter according to an embodiment of the invention IWF example passage process;
Fig. 5 is the network topology change process schematic diagram of the continuous playback of realization according to an embodiment of the invention;
Fig. 6 is the network topology change process schematic diagram of realization continuous data business according to an embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
The present invention inherits the passage of former terminal by new terminal method keeps continuous communiction.Under protocol frame H.248, by self-defining expanding packet (switching bag), be used for MSC Server notice and issue parameter giving new terminal, make it can inherit the passage of former terminal, when system's playback, shift the sync tone passage, shift IWF example passage when data service is communicated by letter, new terminal also can continue communication on original passage like this, thereby keeps the continuity of playback or data service.In the switching bag of expansion, need to define the call parameter of inheriting sync tone passage or IWF example passage, realize the necessary flow process that passage is inherited jointly by each functional entity of core net simultaneously.In addition, the present invention gives a kind of the variation by network topology structure and realizes that passage is inherited and the changing method of continuous communiction in the MGW context, when system's playback, by adding the method for a virtual terminal, the topological structure of three terminal rooms changes when switching, thereby make new terminal inherit the sync tone passage of former terminal, when data service is communicated by letter, there is network topology structure in the IWF example in connecting, therefore pass through the generation and the relevant information of the detection switching of topologies change, realize the succession of IWF example passage, the purpose of continuous communiction when final realization is switched.
In one embodiment of the invention, by the switching bag of expansion, realize inheriting, such as the succession of sync tone passage or IWF example passage by the passage under the MSC Server control.MSC Server is handed down to MGW immediately and sets up new terminal (Termination is called for short " T ") in context when receiving the handoff request that the RNC side is sent, and new T foundation is connected with land circuit, is used for giving after switching is finished new RNC access communications.Simultaneously, MSC Server need issue and switch bag, switches in the bag and has carried the switching parameters needed, after new T receives to switch bag, can inherit the passage of former T according to parameter, keeps communication to carry out continuously.
In one embodiment of the invention, it is as follows that the form that wraps (Handover Package) is switched in definition: the sign of bag (PackageID) is threegho, its hexadecimal numerical value is numbered distributor gear (Internet Assigned Numbers Authority by the Internet, be called for short " IANA ") distribute, threegho is the abbreviation of 3GHandOver here.Other parameter-definitions are as follows, as version (Version): 1, whether expand (Extends): do not have, attribute (Properties): do not have, incident (Events): do not have signal (Signals): take over the relevant signal of various passages, statistics (Statistics): do not have.The signal of required use was one of crucial parameter in order to guarantee to take over seamlessly when wherein the switching bag was used to define switching.This signaling bearer new T necessary parameter when taking over the passage of former T.
In one embodiment of the invention, switch bag signal definition be used to take over the signal of sync tone passage: take over sync tone passage (Take over announcement channel).The parameter that adapter sync tone channel signal is carried comprises:
Signal identification (SignalID): tkann (0x0001) is english abbreviation, is used to identify this signal; Signal description (Description): capture the sync tone passage on the designated terminal, be used to notify new T to take corresponding action; Signal type (Signal type): Brief; Duration (Duration): do not have.(Additional parameter) is as follows for the additional parameter that comprises in addition: initial terminal sign (OriginalTermination ID): i.e. the sign of former T, and this sign is to be convenient to new T to obtain the positioning action object, is one of crucial parameter; Parameter identification (ParameterID): oriterm (0x0001) is used to specify the character of additional parameter; Type (Type): integer, the data type of appointment additional parameter is considered 3GPPTS 29.232 V.4.8.0 to the Naming conventions of terminal iidentification, when adopting binary coding, terminal iidentification is 4 bytes, therefore uses integer (integer) enough; Span (Possible values): any legal terminal iidentification number, but do not comprise root (Root) and asterisk wildcard; Parametric description (Description): the sync tone passage of which terminal is taken in indication.
As seen, the signal definition of above-mentioned adapter sync tone passage the new T sync tone passage parameters needed of taking over former T, as the identification number of former T, action description etc.This signal is used for the playback process in system, take place if switch, then MSC Server will be after receiving the handoff request that the RNC side is sent, following signaling is set up new T, and issue the switching bag that has this signal to MGW, after receiving this switching bag, learn the order of taking over the sync tone passage according to signal description, MGW is according to the identification number of former T, just shift on the former T and inherit for new T, after the user inserts new RNC, connect, thereby just proceed task in playback with new T at the sync tone passage of playback, the function of continuous playback when realizing switching solves playback and interrupts or discontinuous problem.
In one embodiment of the invention, switch bag signal definition be used to take over the signal of IWF example passage: take over IWF example (Take over interworking function).The parameter that adapter IWF example signal is carried comprises:
Signal identification (SignalID): tkiwf (0x0002) is english abbreviation, is used to identify this signal; Signal description (Description): capture the IWF example on the designated terminal, be used to notify new T to take corresponding action; Signal type (Signal type): Brief; Duration (Duration): do not have.(Additional parameter) is as follows for the additional parameter that comprises in addition: initial terminal sign (OriginalTermination ID): i.e. the sign of former T, and this sign is to be convenient to new T to obtain the positioning action object, is one of crucial parameter; Parameter identification (ParameterID): oriterm (0x0001) is used to specify the character of additional parameter; Type (Type): integer, the data type of appointment additional parameter; Span (Possible values): any legal terminal iidentification number, but do not comprise root (Root) and asterisk wildcard; Parametric description (Description): the IWF example of which terminal is taken in indication.
As seen, the signal definition of above-mentioned adapter IWF example passage the new T IWF example passage parameters needed of taking over former T, as the identification number of former T, action description etc.This signal is used in data service communication, as mobile subscriber and fixed-line subscriber in communication process, take place if switch, then MSC Server will be after receiving the handoff request that the RNC side is sent, following signaling is set up new T, and issue the switching bag that has this signal to MGW, after receiving this switching bag, learn the order of taking over IWF example passage according to signal description, MGW is according to the identification number of former T, shifting the IWF example passage that is carrying out data service communication on the former T inherits for new T, after inserting new RNC, the user connects with new T, thereby the data service of proceeding communicating by letter, the function of continuous communiction when realizing switching solves data service and interrupts or discontinuous problem.
In another embodiment of the present invention, adopt text code for the parameter of switching in the bag signal " initial terminal sign ", according to regulation H.248, terminal iidentification is 64 characters, so dtd is a character string.
Those of ordinary skill in the art are appreciated that, the concrete form of above-mentioned switching bag and parameter-definition and value can be set to realize inheriting the carrying of passage desired parameters convenient and reasonablely according to actual conditions, the form of described signal and the parameter of carrying can be expanded according to needs in the practical application, realize the switching succession of more passages, be not limited to scheme given among the embodiment, realize goal of the invention and do not influence the spirit and scope of the invention.
In one embodiment of the invention, correspondingly defined the pairing process (Procedures) that realizes by network entity such as MSC, MGW, terminal etc. of various signals in the above-mentioned switching bag.
When MGW receives " taking over the sync tone passage " signal, should check " initial terminal sign " parameter that signal is entrained, if on the terminal of appointment, have the sync tone passage, and this terminal with receive that the terminal of signal is in the same context, then it should be captured, give the terminal of receiving " taking over the sync tone passage " signal.If on the terminal of appointment, there is not the sync tone passage, perhaps not in same context, then should return mistake to MSC Server.
When MGW receives " taking over the IWF example " signal, should check " initial terminal sign " parameter that signal is entrained, if on the terminal of appointment, have the IWF example, and this terminal with receive that the terminal of signal is in the same context, then it should be captured, give the terminal of receiving " taking over the IWF example " signal.If on the terminal of appointment, there is not the IWF example, perhaps not in same context, then should return mistake to MGC Server.
According to the definition of aforementioned switching bag, Fig. 2 shows the flow process of the changing method of maintenance continuous communiction according to an embodiment of the invention.
At first in step 201, after MSC Server receives handoff request, issue adding (ADD) instruction and in context, set up a new T, new T links to each other with new land circuit, after the user switches on the new air traffic channel, new NodeB/RNC detects user's access, and reports MSC Server.
Then enter in the step 202, MSC Server hair band about new T has the switching bag of adapter respective channel signal, and notice MGW requires that the passage on the former T is transferred to new T and goes up, the parameter that signal carried during MGW wrapped according to switching, such as the initial terminal sign, take over the passage of inheriting former T by new T.
Then enter in the step 203, MSC Server issues the event request that originally was issued on the former T again on new T, such as playback end notification, service rate change notification etc., to guarantee the integrality of signaling communication, avoids resource to lose.
Then enter in the step 204, after switching is finished, continue on former T passage, to communicate by new T, and notify former RNC call release related resource by MSC Server, and the former T on the deletion MGW.
According to above-mentioned flow process, in one embodiment of the invention, the handoff procedure of taking over corresponding to the sync tone passage is described below: switch when system carries out playback by T1 to the user, MSC Server is after receiving handoff request, in context, set up a new T, called after T1 ', it links to each other with new land circuit; After the user switches on the new air traffic channel, new NodeB/RNC will detect user's access, after MSC obtains report, if on former T1, playing sync tone, then at the T1 ' threegho/tkann that signals up and down, (being that signal is a switching bag of taking over the sync tone passage) requires MGW that the sync tone passage on the T1 is transferred to T1 ' and comes up; After finishing the sync tone succession, new T can continue the playback to the user; If MSC Server had once issued event request to T1, as the playback end notification, then MSC Server should issue this event request again when T1 ' signals threegho/tkann up and down; After switching is finished, notify former RNC call release related resource, and the T1 on the deletion MGW.Fig. 3 shows the situation of change that terminal connects in the context in the adapter sync tone passage process according to an embodiment of the invention.
According to above-mentioned flow process, in one embodiment of the invention, the handoff procedure of taking over corresponding to IWF example passage is described below: when the user is carrying out data service communication, in the context of MGW, terminal T1 is connected with terminal T2 by the IWF example, when the user switches, after MSC Server receives handoff request, in context, set up a terminal, called after T1 ', it links to each other with new land circuit; After the user switches on the new air traffic channel, new NodeB/RNC will detect user's access, after MSC obtains report, if an IWF example is arranged on former T1, then, require MGW that the IWF example on the T1 is transferred to T1 ' and come up at the T1 ' threegho/tkiwf (being that signal is a switching bag of taking over IWF example passage) that signals up and down; After finishing the succession of IWF example passage, new T keeps data service communication to carry out continuously; If MSC Server had once issued event request to T1, as the rate variation notice, then MSC Server should issue this event request again when T1 ' signals threegho/tkiwf up and down; After switching is finished, notify former RNC call release related resource, and the T1 on the deletion MGW.Fig. 4 shows in the adapter according to an embodiment of the invention IWF example passage process situation of change that terminal and IWF example connect in the context.
In one embodiment of the invention, realize of the transfer of the passage of former T by terminal network changes of topology structure in the context when switching to new T.
Fig. 5 shows the network topology change process that realizes continuous playback according to an embodiment of the invention, situation about switching when the user being carried out synchronous playback for system, because in the context, there is not the network topology structure between a plurality of T, therefore increase virtual T, constitute network topology structure.System is by transferring sync tone to virtual T, then by virtual T again playback give former T or new T, promptly when system need play sync tone to former T (being called T1), be not directly to provide tone signal up and down at T1, but set up a virtual T (being called T2) in addition, and to specify topology be T2-T1 is unidirectional, and the playback signal issues on T2, by the topological structure of T2 to T1, finish the playback of system to the user, the user is listening the T2 playback like this.When T1 switches, need set up a new T (being called T1 ') with the new land circuit of correspondence, specify topology this moment is T2-〉T1 ' is unidirectional, in this handoff procedure, T2 is to T1 and T1 ' while playback, therefore no matter the user still is T1 ' access switching front and back from T1, does not influence hearing effect, keeps continuous playback.After the finishing switching, can delete T1, audition is deleted T2 after finishing again, can guarantee that so again resource is not wasted.
Fig. 6 shows the network topology change process that realizes the continuous data business according to an embodiment of the invention, situation for data service communication, because the T1 (former T) of mobile side has set up by the IWF example with the T2 of opposite side and has been connected in context, there is the network topology relation between the two, when T1 switches, need set up a new T (being called T1 ') with the new land circuit of correspondence, specify this moment topology be T2＜-T1 is two-way, T2-T1 ' is unidirectional; After detecting the user and switching to new air traffic channel, revising topology again is T2-〉T1 is unidirectional, T2-〉T1 ' is two-way, MGW is then according to the variation of topology, judge switching has taken place, IWF example passage is transferred to T1 ' from T1, therefore switches the IWF example passage that back T1 ' has inherited former T, proceed the communication of data service.
Though by reference some preferred embodiment of the present invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that, can do various changes to it in the form and details, and the spirit and scope of the present invention that do not depart from appended claims and limited.
Claims (12)
1. keep the changing method of continuous communiction in the mobile communication system, it is characterized in that, comprise following steps:
A is when switching generation, and the Mobile Switching Center Server transmitting order to lower levels is set up new terminal in the context of media gateway;
The described new terminal of B is inherited the passage of former terminal and is used this passage to continue communication.
2. keep the changing method of continuous communiction in the mobile communication system according to claim 1, it is characterized in that described passage is the sync tone passage, be used for system user's playback.
3. keep the changing method of continuous communiction in the mobile communication system according to claim 1, it is characterized in that described passage is an interactive function example passage, is used for data service communication.
4. according to the changing method that keeps continuous communiction in each described mobile communication system in the claim 1 to 3, it is characterized in that described step B also comprises following substep,
Described Mobile Switching Center Server issues to described media gateway and switches bag;
Described media gateway is transferred to described new terminal with described passage from described former terminal according to described switching bag institute beared information;
Wherein said switching bag is used to carry the signal of taking over described passage.
5. the changing method that keeps continuous communiction in the mobile communication system according to claim 4, it is characterized in that, described switching bag comprises takes over the sync tone channel signal, described adapter sync tone channel signal is used to indicate described new terminal to take over the described sync tone passage of described former terminal, described adapter sync tone channel signal comprises the initial terminal identification parameter, is used for specifying described former terminal at described context.
6. keep the changing method of continuous communiction in the mobile communication system according to claim 5, it is characterized in that the handling process of described switching bag comprises following steps,
System is in user's playback process, described Mobile Switching Center Server is after receiving handoff request, set up described new terminal in described media gateway, and the described new terminal in described media gateway issues described switching bag, it is described adapter sync tone channel signal that described switching bag comprises signal;
Described media gateway judges on the specified terminal of the entrained described initial terminal identification parameter of described adapter sync tone channel signal whether have described sync tone passage, and be in the same context with described new terminal, if, then described sync tone passage is transferred to described new terminal, otherwise, return mistake to described Mobile Switching Center Server.
7. the changing method that keeps continuous communiction in the mobile communication system according to claim 4, it is characterized in that, described switching bag comprises takes over the interactive function example signal, described adapter interactive function example signal is used to indicate described new terminal to take over the described interactive function example passage of described former terminal, described adapter interactive function example signal comprises described initial terminal identification parameter, is used for specifying described former terminal at described context.
8. keep the changing method of continuous communiction in the mobile communication system according to claim 7, it is characterized in that the handling process of described switching bag comprises following steps,
In the data service communication process, described Mobile Switching Center Server is after receiving handoff request, set up described new terminal in described media gateway, and issue described switching bag to described new terminal, it is described adapter interactive function example signal that described switching bag comprises signal;
Described media gateway judges on the specified terminal of the entrained described initial terminal identification parameter of described adapter interactive function example signal whether have described interactive function example passage, and be in the same context with described new terminal, if, then described interactive function example passage is transferred to described new terminal, otherwise, return mistake to described Mobile Switching Center Server.
9. according to the changing method that keeps continuous communiction in each described mobile communication system in the claim 1 to 3, it is characterized in that described step B also comprises following substep,
B1 by the changes of topology structure between the terminal described in the described context, realizes that described passage transfers to described new terminal from described former terminal when switch taking place.
10. keep the changing method of continuous communiction in the mobile communication system according to claim 9, it is characterized in that described step B1 also comprises following substep:
System sets up virtual terminal in described context when user's playback, described virtual terminal is accepted the playback signal, and the unidirectional topological structure from described virtual terminal to described former terminal is set, by described virtual terminal by described former terminal to user's playback;
When switching generation, described Mobile Switching Center Server transmitting order to lower levels, in described context, set up described new terminal, and set described virtual terminal to the unidirectional topological structure of described new terminal, by described virtual terminal simultaneously by described former terminal and described new terminal playback;
After finishing switching, discharge the resource of described former terminal.
11. keep the changing method of continuous communiction in the mobile communication system according to claim 9, it is characterized in that described step B1 also comprises following substep:
In the data service communication process, set the two-way topological structure between described former terminal and the passage opposite side terminal in the described context, communicate;
When switching generation, described Mobile Switching Center Server transmitting order to lower levels, in described context, set up described new terminal, and set the unidirectional topological structure of described passage opposite side terminal to described new terminal, keep the two-way topological structure between described former terminal and the described passage opposite side terminal simultaneously;
After described media gateway detects the variation of described network topology structure, described interactive function example passage is transferred to described new terminal from described former terminal, and set the unidirectional topological structure of described passage opposite side terminal to described former terminal, set the two-way topological structure between described new terminal and the described passage opposite side terminal;
After finishing switching, discharge the resource of described former terminal.
12. the changing method according to keeping continuous communiction in each described mobile communication system in the claim 1 to 3 is characterized in that described method also comprises following steps:
Described Mobile Switching Center Server judges whether once to issue event request to described former terminal, if then issue this event request again to described new terminal; After finishing switching, discharge the resource of described former terminal.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101010204A CN1319409C (en) | 2004-12-02 | 2004-12-02 | Switching method for keeping continuous communication in mobile communication system |
| DE602005016382T DE602005016382D1 (en) | 2004-12-02 | 2005-11-30 | FURTHER METHOD IN A MOBILE COMMUNICATION SYSTEM FOR SECURING COMMUNICATION CONTINUATION |
| AT05817630T ATE442017T1 (en) | 2004-12-02 | 2005-11-30 | HANDOVER METHOD IN A MOBILE COMMUNICATIONS SYSTEM TO ENSURE COMMUNICATION CONTINUATION |
| PCT/CN2005/002063 WO2006058498A1 (en) | 2004-12-02 | 2005-11-30 | Handover method in a mobile communication system for guaranteeing communication continuation |
| EP05817630A EP1734777B1 (en) | 2004-12-02 | 2005-11-30 | Handover method in a mobile communication system for guaranteeing communication continuation |
| US11/542,967 US7885655B2 (en) | 2004-12-02 | 2006-10-04 | Switch method for ensuring communication continuity in mobile communication system |
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| CNB2004101010204A CN1319409C (en) | 2004-12-02 | 2004-12-02 | Switching method for keeping continuous communication in mobile communication system |
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| CN1784073A true CN1784073A (en) | 2006-06-07 |
| CN1319409C CN1319409C (en) | 2007-05-30 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100459811C (en) * | 2006-07-21 | 2009-02-04 | 华为技术有限公司 | Channel switching method |
| WO2009132524A1 (en) * | 2008-04-28 | 2009-11-05 | 华为技术有限公司 | A method, system and device for keeping continuity of user's service |
| WO2009143781A1 (en) * | 2008-05-28 | 2009-12-03 | 华为技术有限公司 | Method and device for processing handover of single radio voice call continuity (sr vcc) service |
| CN101822121A (en) * | 2007-10-10 | 2010-09-01 | 爱立信电话股份有限公司 | Handling resources in communications network |
| CN101309505B (en) * | 2007-05-15 | 2011-12-07 | 华为技术有限公司 | Voice service routing method and system in radio communication system |
| CN102281597A (en) * | 2010-06-12 | 2011-12-14 | 普天信息技术研究院有限公司 | Cooperation and switch methods of eNodeB and relay node services |
| CN109474741A (en) * | 2018-11-15 | 2019-03-15 | 惠州Tcl移动通信有限公司 | Lasting method, mobile terminal and computer readable storage medium are communicated when mobile |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU1293001A (en) * | 1999-11-29 | 2001-06-04 | Nokia Corporation | Transfer of optimization algorithm parameters during handover of a mobile station between radio network subsystems |
| KR100377393B1 (en) * | 2001-06-01 | 2003-03-26 | 삼성전자주식회사 | Method for hand off in mobile communication system |
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- 2004-12-02 CN CNB2004101010204A patent/CN1319409C/en not_active Expired - Fee Related
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| CN100459811C (en) * | 2006-07-21 | 2009-02-04 | 华为技术有限公司 | Channel switching method |
| CN101309505B (en) * | 2007-05-15 | 2011-12-07 | 华为技术有限公司 | Voice service routing method and system in radio communication system |
| CN101822121A (en) * | 2007-10-10 | 2010-09-01 | 爱立信电话股份有限公司 | Handling resources in communications network |
| US10448305B2 (en) | 2008-04-28 | 2019-10-15 | Huawei Technologies Co., Ltd. | Method, system and device for maintaining user service continuity |
| US8442535B2 (en) | 2008-04-28 | 2013-05-14 | Huawei Technologies Co., Ltd. | Method, system and device for maintaining user service continuity |
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| US9736747B2 (en) | 2008-04-28 | 2017-08-15 | Huawei Technologies Co., Ltd. | Method, system and device for maintaining user service continuity |
| US10064116B2 (en) | 2008-04-28 | 2018-08-28 | Huawei Technologies Co., Ltd. | Method, system and device for maintaining user service continuity |
| WO2009132524A1 (en) * | 2008-04-28 | 2009-11-05 | 华为技术有限公司 | A method, system and device for keeping continuity of user's service |
| CN101594647B (en) * | 2008-05-28 | 2011-11-02 | 华为技术有限公司 | Method for switching SR VCC service and apparatus thereof |
| WO2009143781A1 (en) * | 2008-05-28 | 2009-12-03 | 华为技术有限公司 | Method and device for processing handover of single radio voice call continuity (sr vcc) service |
| CN102281597A (en) * | 2010-06-12 | 2011-12-14 | 普天信息技术研究院有限公司 | Cooperation and switch methods of eNodeB and relay node services |
| CN109474741A (en) * | 2018-11-15 | 2019-03-15 | 惠州Tcl移动通信有限公司 | Lasting method, mobile terminal and computer readable storage medium are communicated when mobile |
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| CN111031296A (en) * | 2019-12-17 | 2020-04-17 | 南京巨鲨显示科技有限公司 | Single-fiber and double-fiber transmission mode self-adaptive system of optical transceiver |
| CN111031296B (en) * | 2019-12-17 | 2021-05-14 | 南京巨鲨显示科技有限公司 | Single-fiber and double-fiber transmission mode self-adaptive system of optical transceiver |
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