CN1973455B

CN1973455B - Inter-system handover

Info

Publication number: CN1973455B
Application number: CN2005800129350A
Authority: CN
Inventors: 朱宰永; 朱荣虎; 金显郁; 金泳洛
Original assignee: SK Telecom Co Ltd
Current assignee: SK Telecom Co Ltd
Priority date: 2004-03-10
Filing date: 2005-03-10
Publication date: 2011-05-04
Anticipated expiration: 2025-03-10
Also published as: KR100612675B1; KR20050090857A; CN1973455A

Abstract

A method of handover in a wireless communication system in which an asynchronous system and a synchronous system are mixed is disclosed. The method comprises the steps of: the asynchronous system ordering a dual mode mobile terminal to perform a handover from the asynchronous system to the synchronous system; when the handover order is received at the mobile terminal, the mobile terminal transmitting a frame or a preamble through a reverse traffic channel to the synchronous system, reporting to the synchronous system that the handover is completed and initiating a timer of the mobile terminal which is set according to a predetermined time; the mobile terminal switching from an asynchronous vocoder into a synchronous vocoder when the timer expires; and the wireless communication system switching vocoders of asynchronous and synchronous MSCs when the report is received.

Description

Inter-system handover

Technical field

The present invention relates to a kind of handover method between dissimilar mobile communication system, and specifically, relate to and a kind ofly coexist as handover method in wherein the cordless communication network in asynchronous system and synchro system.

Background technology

Current mobile communications network has a kind of like this general layout: the synchronous mobile communication system (CDMA mobile communication system) that is called 2G or 2.5G communication network coexists as wherein with the asynchronous mobile communiation system (WCDMA mobile communication system) that is called the 3G communication network.

Along with such mobile communication network technology constantly develops, currently the double-frequency double-mode terminal (DBDM) that can use in synchro system and asynchronous system is researched and developed, and such portable terminal makes it possible to use the service of different mode in asynchronous system service area and synchro system service area.The DBDM portable terminal comprises antenna, synchronous modem (being the module that is used for the synchronous mobile communication service), asynchronous modem controller (being the module that is used for the asynchronous mobile communiation service) and shared module.

Because asynchronous mobile communiation system is in starting stage of service, and need huge investment realize this system, can't be to covering be provided very on a large scale, so it is to realize with the overlapping form of synchronous mobile communication system service area.Because the service coverage of asynchronous mobile communiation system is limited, if therefore using the synchronous service district that the asynchronous mobile communiation system subscriber of the service in the asynchronous service district moves to does not provide the asynchronous mobile communiation service, need so to join, so that provide continuous service for this subscriber.

Current, studying various at the handover method that moves to the terminal of synchronous mobile communication system from asynchronous mobile communiation system.During the handing-over of such portable terminal, portable terminal must switch to the asynchronous vocoder that is used for carrying out voice call with asynchronous communication system and be used for carrying out with synchronous communication system the synchronous vocoder of voice call, and asynchronous and synchronous communication system all needs the vocoder hand-off process.Therefore, portable terminal and mobile communication system can be carried out voice call after all having switched vocoder.

But, owing in moment of the vocoder that switches portable terminal and switch between moment of vocoder of mobile communication system and be stored in the gap, therefore during joining, quiet period can occur, thereby cause service quality to reduce.

Summary of the invention

An object of the present invention is to provide a kind of mobile communication system and coexist as handover method in wherein the mobile communications network at different mode.

Another object of the present invention provides the handover method of the quiet period minimum during the handing-over between a kind of mobile communication system that can make different mode.

Another purpose more of the present invention provides a kind of handover method from the asynchronous mobile communiation system to the synchronous mobile communication system.

According to a first aspect of the invention, to achieve these goals, a kind of bimodulus mobile system handover method from the asynchronous mobile communiation system to the synchronous mobile communication system during calling out, may further comprise the steps: described asynchronous mobile communiation system is according to the handover request of described portable terminal, to described synchronous mobile communication system request handing-over; Described synchronous mobile communication system is that described portable terminal distributes forward communication channels, and to the response message of described asynchronous mobile communiation system transmission at described handover request; Described asynchronous mobile communiation system is to described portable terminal indication handing-over; When receiving described handing-over indication, described portable terminal via reverse channel communication to described synchronous mobile communication system transmit frame or lead code (preamble), finish to described synchronous mobile communication system report handing-over, and start the timer that is set to predetermined timing; Described portable terminal switches vocoder being provided with of timer when regularly expiring; With when receive from described portable terminal the handing-over finish report the time, described synchronous mobile communication system reports that to described asynchronous mobile communiation system the handing-over of described portable terminal finishes, and switches vocoder between asynchronous switching center and synchronous exchange center.

Preferably, described asynchronous mobile communiation system according to use in the described synchronous mobile communication system with the relevant message of handing-over and comprise contiguous emitter region information, neighbor base station information, type of handover, handing-over reason, source base station controller ID, target base station controller ID, the RAB information of described portable terminal and the parameter request transfer of the information of being correlated with radio interface.

Preferably, described method is further comprising the steps of: the handover request that described asynchronous mobile communiation system is judged described portable terminal with reference to the contiguous emitter region information and the neighbor base station information of portable terminal be in the asynchronous communication system handing-over or to the handing-over of synchronous mobile communication system.

And preferably, the described handover request from described asynchronous mobile communiation system to described synchronous mobile communication system comprises the asynchronous identification number (MSISDN) of described portable terminal.And, described handover request message from described asynchronous switching center to described synchronous exchange center comprises at least one parameter in the middle of charging ID, ESN, inner exchanging central circuit ID and the MIN parameter, and described synchronous mobile communication system comprises CDMA Channel data parameters or CDMA Channel list parameter at the response message of described handover request.

According to a second aspect of the invention, in the mobile communication system of asynchronous mobile communiation system and synchronous mobile communication system coexistence, a kind of handover method that is used to allow to the quiet period minimum of DBDM portable terminal during audio call that communicate with asynchronous mobile communiation system and synchronous mobile communication system, this method may further comprise the steps: described asynchronous mobile communiation system joins to described synchronous mobile communication system request according to the handover request of described portable terminal; Described base station/the base station controller of described synchronous mobile communication system distributes forward communication channels to described portable terminal, and sends receiveing the response at described handover request to described asynchronous mobile communiation system; The described asynchronous switching center of mind-set sends the response message at handover request in the described synchronous exchange, to set up trunk line between described asynchronous switching center and described synchronous exchange center; Described asynchronous switching center finishes at the resource allocation of handing-over to the radio network controller report of described asynchronous mobile communiation system; Described radio network controller joins to described portable terminal indication via described Node B, so that described portable terminal is switched to the synchronous mobile communication system connection mode; To described base station/base station controller transmit frame or lead code, and finish by report handing-over via reverse channel communication for described mobile communication terminal; Described mobile communication system starts timer when finishing with being connected of described synchronous mobile communication system; Described base station/base station controller is finished via the report handing-over of the described asynchronous switching center of mind-set in the described synchronous exchange; Described portable terminal is finished the startup of timer and is switched vocoder; Between described asynchronous switching center and described synchronous exchange center, switch vocoder; And remove being connected between described asynchronous switching center and the described Node B/radio network controller.

Preferably, the described asynchronous mobile communiation system of described releasing may further comprise the steps with step of connecting between the described synchronous mobile communication system: described asynchronous switching center is connected releasing to described Node B/radio network controller request, and described asynchronous switching center receives to connect to remove from described Node B/radio network controller and finishes.

Preferably, described radio network controller described step from handover request message to described asynchronous switching center that send is included in the message of using in the described synchronous communication system relevant with handing-over and the contiguous emitter region information that comprises described portable terminal, neighbor base station information, type of handover, handing-over reason, source base station controller ID, target base station controller ID, RAB information and the parameter of the information of being correlated with wireless part.

And preferably, described method is further comprising the steps of: judge that with reference to the contiguous emitter region information of described portable terminal and neighbor base station information described asynchronous switching center is the interior handing-over of asynchronous mobile communiation system or to the handing-over of synchronous mobile communication system.

And preferably, comprise the asynchronous identification number (MSISDN) of portable terminal from asynchronous switching center to the handover request message at synchronous exchange center, and before sending handover request information, send the charging ID of the id information that comprises the synchronous exchange center that will link to each other and join the inner exchanging central circuit ID (InterMSCCircuitID) in the time interval corresponding to each with described asynchronous switching center.In addition, described handover request message comprises the parameter that comprises charging ID, ESN, inner exchanging central circuit ID and MIN, and the response message that described synchronous exchange center sends to described asynchronous switching center comprises the parameter that comprises CDMA Channel data and CDMA Channel tabulation.In addition, the parameter that message comprises the RAB tabulation that comprises type of message, RRC container and will remove is finished in resource allocation.

Preferably, after the step of connecting between the described asynchronous switching center of described releasing and described Node B/radio network controller, initiating when portable terminal receives the call release request from call out to insert or call out, the switching center that receives described call release request sends to corresponding switching center with described call release request message, and when corresponding switching center made response to this, the trunk line of setting up between described asynchronous switching center and described synchronous exchange center was removed.

According to a third aspect of the present invention, asynchronous mobile communiation system and synchronous mobile communication system coexist as wherein and described asynchronous mobile communiation system and described synchronous mobile communication system mobile communication system by intercommunication/be connected with functional unit mutually in, a kind of handover method that is used to allow to DBDM portable terminal quiet period minimum during audio call of communicating with described asynchronous mobile communiation system and described synchronous mobile communication system, this method may further comprise the steps: described asynchronous switching center sends handover request message to described intercommunication/mutually with functional unit, and described intercommunication/send the subscriber information of described portable terminal and receive described subscriber information with described pair of stack home location register of function unit requests mutually; Described intercommunication/indication joins to described synchronous exchange center with functional unit mutually, and the described base station controller of mind-set in the described synchronous exchange/base station requests handing-over; Described base station/base station controller distributes forward communication channels to described portable terminal, and to the response message of described synchronous exchange center transmission at this handover request; The described intercommunication of mind-set in the described synchronous exchange/send the response message of indicating with functional unit mutually at handing-over, and described intercommunication/use functional unit mutually, thereby set up trunk line in described asynchronous switching center and described synchronous exchange center to the response message of described asynchronous switching center transmission at handover request; Described asynchronous switching center finishes at the resource allocation of handing-over to described radio network controller report; Described radio network controller joins to described portable terminal indication via described Node B, so that described portable terminal is switched to the synchronous mobile communication system connection mode; Described intercommunication/send to described asynchronous switching center with functional unit mutually and insert signal; To described base station/base station controller transmit frame and lead code, and finish by report handing-over via reverse channel communication for described portable terminal; Described portable terminal starts timer when finishing with being connected of described synchronous mobile communication system; Described base station/base station controller is finished to the report handing-over of described switching center, and described switching center is to described intercommunication/ finish with the handing-over of functional unit notice mutually; Described portable terminal is finished the startup of timer and is switched vocoder; Between described asynchronous switching center and described synchronous exchange center, switch vocoder; And remove being connected between described asynchronous switching center and the described Node B/radio network controller.

Preferably, described handover request message be included in use in the described synchronous communication system with the relevant message of handing-over and comprise contiguous emitter region information, neighbor base station information, type of handover, handing-over reason, source base station controller ID, target base station controller ID, the RAB information of described portable terminal and the parameter of the information of being correlated with wireless part.

Preferably, described method is further comprising the steps of: judge that according to the contiguous emitter region information of described portable terminal and neighbor base station information described asynchronous switching center is handing-over in the asynchronous mobile communiation system or the handing-over in the synchronous mobile communication system.

And preferably, described intercommunication/subscriber information that receives from described pair of stack home location register mutually with functional unit comprise described portable terminal synchronization identifier (MIN, ESN).In addition, described intercommunication/use functional unit mutually to the described step use synchronization message of the subscriber information of the described pair of described portable terminal of stack home location register request or any one in the asynchronous message.And preferably, before sending the handing-over Indication message to described synchronous exchange center, described intercommunication/mutual the id information that produces the synchronous exchange center that will link to each other with functional unit with described asynchronous switching center, so that this id information is covered in the described handing-over Indication message, and send the handing-over Indication message that comprises corresponding to the inner exchanging central circuit ID (InterMSCCircuitID) in each handing-over time interval.

Preferably, described intercommunication/mutually comprises the parameter that comprises charging ID, ESN, inner exchanging central circuit ID and MIN with the described handover request message that functional unit sends to described synchronous exchange center, and described synchronous exchange center sends to described intercommunication/mutually and comprises with the response message of functional unit and comprise the parameter that CDMA Channel data and CDMA Channel are tabulated.

In addition, the RAB tabulation that message comprises type of message, RRC container and will remove is finished in described resource allocation.And described access signal comprises and calls ID, Application Protocol Data Unit (APDU) and selected wireless resource information.

Preferably, after the step of connecting of removing between described asynchronous switching center and the described Node B/radio network controller, initiating when portable terminal receives the call release request from call out to insert or call out, the switching center that receives described call release request sends to described intercommunication/use mutually functional unit with described call release request message, and described intercommunication/this is made response with functional unit mutually, thereby the trunk line of setting up between described asynchronous switching center and the described synchronous exchange center is removed.More preferably, described call release request message comprises the parameter that comprises inner MSC circuit I D, removes reason, charging ID and MIN, and described response message comprises charging ID.

According to a fourth aspect of the present invention, asynchronous mobile communiation system and synchronous mobile communication system be mixed in wherein and described asynchronous mobile communiation system and described synchronous mobile communication system mobile communication system by intercommunication/be connected with functional unit mutually in, a kind of handover method that is used to allow to DBDM portable terminal quiet period minimum during audio call of communicating with described asynchronous mobile communiation system and described synchronous mobile communication system, this method may further comprise the steps: described asynchronous switching center sends handover request message to described intercommunication/mutually with functional unit, and described intercommunication/send the subscriber information of described portable terminal and receive described subscriber information with described pair of stack home location register of function unit requests mutually; Described intercommunication/indicate described synchronous exchange center to join with functional unit mutually, and the described base station controller of mind-set in the described synchronous exchange/base station requests handing-over; Described base station/base station controller distributes forward communication channels to described portable terminal, and to the response message of described synchronous exchange center transmission at this handover request; The described intercommunication of mind-set in the described synchronous exchange/send the response message of indicating with functional unit mutually at handing-over, and described intercommunication/use functional unit mutually, thereby set up trunk line in described asynchronous switching center and described synchronous exchange center to the response message of described asynchronous switching center transmission at handover request; Described asynchronous switching center is to described intercommunication/mutually send initial address message and receive the response that this is made with functional unit, thereby sets up trunk line between described asynchronous switching center and described synchronous exchange center; Described asynchronous switching center finishes to described radio network controller report resource allocation; Described radio network controller indicates described portable terminal to join via described Node B, thereby described portable terminal is switched to the synchronous mobile communication system connection mode; Described intercommunication/send to described asynchronous switching center with functional unit mutually and insert signal; To described base station/base station controller transmit frame or lead code, and finish by report handing-over via reverse channel communication for described portable terminal; Described portable terminal starts timer when finishing with being connected of described synchronous mobile communication system; Described base station/base station controller is finished to the report handing-over of described switching center, and described switching center notifies described intercommunication/ finish with the functional unit handing-over mutually; Described portable terminal finishes the startup of timer and switches vocoder; Between described asynchronous switching center and described synchronous exchange center, switch vocoder; And remove being connected between described asynchronous switching center and the described Node B/radio network controller.

Preferably, set up the step of trunk line to implement in such a way between described asynchronous switching center and described synchronous exchange center: described asynchronous switching center is to described intercommunication/send initial address message (IAM) with functional unit mutually, and described intercommunication/send the address with functional unit to described asynchronous switching center mutually to finish message, this initial address message is an isup message, and it is isup message that message is finished in this address.In addition, preferably, step of connecting between the described asynchronous switching center of described releasing and the described Node B/radio network controller may further comprise the steps: described intercommunication/use the described asynchronous switching center of function unit requests mutually, and by using isup message to report that described switching center and described portable terminal are connected to each other; And remove being connected between described asynchronous switching center and the described Node B/radio network controller.

And preferably, after the step of connecting between the described asynchronous switching center of described releasing and described Node B/radio network controller, described method is further comprising the steps of: in the calling of removing in the call disestablishment in the service area of portable terminal at asynchronous mobile communiation system between described asynchronous switching center and the described synchronous exchange center; Removing described asynchronous switching center is connected with trunk line between the described synchronous exchange center; With in described asynchronous switching center when described intercommunication/mutually is connected releasing with the functional unit report has been finished, described intercommunication/send the call release request message with functional unit to described synchronous exchange center mutually, and response is made to described call release request message in described synchronous exchange center, thereby removes described trunk line.

More preferably, described call release request message comprises the parameter that comprises inner MSC circuit I D, removes reason, charging ID and MIN, and described response message comprises the parameter that comprises charging ID.

Beneficial effect

The timing of switching vocoder by the mobile communication system that makes portable terminal and different mode when joining between them is consistent each other, and the present invention can make the quiet period minimum.

Description of drawings

Fig. 1 show used the present invention and wherein coexistence a kind of schematic diagram of execution mode of the mobile communications network of asynchronous mobile communiation system and synchronous mobile communication system is arranged.

Fig. 2 and Fig. 3 show the flow chart of handling according to the inter-system handover in the mobile communications network shown in Fig. 1 of one embodiment of the present invention.

Fig. 4 show used the present invention and wherein coexistence the another kind of execution mode of mobile communications network of asynchronous mobile communiation system and synchronous mobile communication system is arranged.

Fig. 5 and Fig. 6 show the flow chart of handling according to the inter-system handover in the mobile communications network shown in Fig. 4 of another embodiment of the invention.

Fig. 7 and 8 figure show the flow chart of handling according to the inter-system handover in the mobile communications network shown in Fig. 4 of another embodiment of the invention.

Embodiment

Specifically introduce the present invention now with reference to exemplary embodiment.

First execution mode

Fig. 1 show used the present invention and wherein coexistence a kind of execution mode of mobile communications network of asynchronous mobile communiation system and synchronous mobile communication system is arranged.

Fig. 2 and Fig. 3 show the flow chart of handling according to the inter-system handover in the mobile communication system network shown in Fig. 1 of one embodiment of the present invention.

With reference to Fig. 1, the portable terminal of using among the present invention 10 has double frequency or mode mobile terminal, this terminal can be served the two at asynchronous mobile communiation service and synchronous mobile communication and be provided, and comprise synchronous modem (module that is used for the asynchronous mobile communiation service), asynchronous modem controller (module that is used for the asynchronous mobile communiation service) and shared module, and can connect with asynchronous mobile communiation system 20 and synchronous mobile communication system 30 respectively, so that with voice and data, services.In addition, according to the present invention, portable terminal 10 comprises timer.When it received the handing-over instruction, portable terminal 10 started this timer (this will introduce in further detail) of having set predetermined timing, and when the setting of timer regularly expired, portable terminal 10 switched its vocoders.

Asynchronous mobile communiation system 20 comprises: as the Node B and the radio network controller (Node B/RNC, 210) that is used for Control Node B of the base station that is used for radio interface (section); Asynchronous switching center (MSC, 220), it links to each other with radio network controller 210, calling out exchange, thereby provides service to portable terminal 10; SGSN (Serving GPRS Support Node, 230), it is connected between radio network controller (RNC) and the general packet radio service (GPRS), with position and the control access and the execution security function of tracking mobile terminal 10; And GGSN (Gateway GPRS Support Node, 250), it is via 240 couplings of SGSN 230 and GPRS (general packet radio service) network, and links to each other with IP network 70, with to intercommunication/provide external packet with functional unit mutually.

In addition, synchronous mobile communication system 30 comprises: the base station and the base station controller (BTS/BSC, 310) of the radio interface of support and portable terminal 10; Switching center (MSC, 320) links to each other with at least one base station terminal, calls out exchange to carry out; Packet data serving node (PDSN, 330), (BSC) links to each other with base station controller, so that provide packet data service for the subscriber; And data core network (DCN, 340), be used to support the connection between the IP network 70.

Asynchronous switching center 220 and synchronous exchange center 320 also interconnect with the shared signaling network 40 of No.7, thereby with two stack home location register (D-HLR, 50) link to each other, and the asynchronous mobile communiation system subscriber information and its corresponding synchronous mobile communication system subscriber information of 50 storages of two stack ownership place registers and management DB DM portable terminal 10, and make asynchronous and these information can be consulted in such service carrying out such as joining in synchronous exchange center 220,230.

In the above in the network of Jie Shaoing, just in the service area of asynchronous mobile communiation system 20, using the portable terminal 10 of audio call measure with current and Node B that this portable terminal links to each other between signal strength signal intensity and the intensity of the signal that sends to adjacent base station and receive from adjacent base station, and give Node B with measurement report, and when and Node B between signal strength signal intensity when being lower than predetermined threshold value, the handing-over incident has taken place via radio net control (RNC) to 220 reports of asynchronous switching center in Node B.At this moment, Node B/RNC210 sends portable terminal 10 detected contiguous emitter region information and base station IDs to asynchronous switching center 220.

When radio network controller (RNC) receives handover request message, asynchronous switching center 220 with reference to the contiguous emitter region information that receives from radio network controller (RNC) and base station IDs judge this handover request message be between the interior contiguous emitter region of asynchronous mobile communiation system 20 handing-over or to the handing-over of synchronous mobile communication system 30.

During handing-over between the contiguous emitter region in handover request message is asynchronous mobile communiation system 20, asynchronous switching center 220 carries out the handing-over to contiguous emitter region, and when handover request message is handing-over to synchronous mobile communication system 30, the handing-over that asynchronous switching center 220 carries out to synchronous exchange center 320.For this reason, asynchronous switching center 220 switches to asynchronous message synchronization message and this synchronization message is sent to synchronous exchange center 320, and asynchronous switching center 220 must manage the synchronous mobile communication system information preparation in advance in database and to this database.

Hereinafter, will handle with reference to the inter-system handover that Fig. 2 and Fig. 3 specifically introduce in the system shown in Fig. 1.

With reference to Fig. 2 and Fig. 3, just in the service area of asynchronous mobile communiation system 20, using the portable terminal 10 of audio call when the service area of synchronous mobile communication system 30 moves, portable terminal 10 detects the signal from synchronous mobile communication system 30, and periodically measure from the signal strength signal intensity of the Node B of asynchronous mobile communiation system 20 and and contiguous emitter region (or Node B) between signal strength signal intensity, and give Node B with measurement report.Therefore, when the current Node B that links to each other with portable terminal 10 recognizes signal strength signal intensity between portable terminal 10 and this Node B when being lower than predetermined value, this Node B via radio network controller (RNC) to the 220 request handing-over (IU Reloc Required) of asynchronous switching center (S101).

This handover request message (IU Reloc Required) comprises the message of using in the synchronous mobile communication system relevant with handing-over.In addition, RNC sends the neighbor base station information that receives from portable terminal 10, contiguous emitter region information etc., and asynchronous switching center 220 according to these information judge handover request message be between the contiguous emitter region in the asynchronous mobile communiation system handing-over or to the handing-over of synchronous mobile communication system 30.

Asynchronous switching center 220 indications that received handover request message join (Facilities Directive2) (S102) to the synchronous exchange center, and synchronous exchange center 320 to the 310 request handing-over (HandoffRequest) of base station controller/base station (S103).

Here, asynchronous mobile switching centre 220 is producing charging ID before to synchronous exchange center 320 transmission handing-over Indication messages (Facilities Directive2), this charging ID being included in handing-over Indication message (Facilities Directive2), and send the handing-over Indication message that comprises corresponding to the inner exchanging central circuit ID in each handing-over time interval.Here, charging ID comprises the id information at the synchronous exchange center 320 that will be connected with asynchronous switching center 220.

Base station/the base station controller 310 that receives handover request from synchronous exchange center 320 sends the NULL frame by forward communication channels (Null forward communication channels) frame to the synchronous modem of portable terminal 10, thereby distribute forward channel (S104), base station/base station controller 310 is to the response message (Handoff RequestAck) of synchronous exchange center 320 transmissions at this handover request then.In addition, synchronous exchange center 320 sends the response message (Facilities Directive2 Ack) of indicating at handing-over to asynchronous mobile switching centre 220.In view of the above, between asynchronous switching center 220 and synchronous exchange center 220, set up trunk line.

More specifically, asynchronous switching center 220 is provided with the mapping between dedicated channel (being that logical trunk is provided with identifier) and the physical relay line, and with the inner exchanging central circuit ID (InterMSCCircuitID) of this information setting to the handover request message that will send to synchronous exchange center 320 (Facilities Directive2), and when sending response message (Facilities Directive2 Ack) from synchronous exchange center 320, trunk line is able to set up between asynchronous switching center 220 and synchronous exchange center 320.The handover request message (Facilities Directive2) that receives between asynchronous switching center 220 and synchronous exchange center 320 and send comprises the parameter that comprises charging ID, ESN, inner exchanging central circuit ID, MIN etc., and response message (Facilities Directive2 Ack) comprises the parameter such as CDMA Channel data, CDMA Channel tabulation.

Like this, when having set up trunk line between asynchronous switching center 220 and the synchronous exchange center 320, the 220 report Node B/RNC 210 of asynchronous switching center finish (IU Relocation Command) (S107) at the resource allocation of handing-over, and the Node B/RNC 210 request portable terminals 10 that receive this report carry out to asynchronous modem controller handing-over (Handover from UTRAN order) (S108).

Then, the asynchronous modem controller of portable terminal 10 to synchronous modem transmitting channel assignment information (Channel Assignment) (S109), and at the synchronous modem of portable terminal 10 via reverse channel communication to base station/base station controller 310 transmit frames of synchronous mobile communication system or lead code (Reverse Traffic Channel Frame of Traffic Channel Preamble) (S110) afterwards, synchronous modem report handing-over is finished (Handoff Completion Message) (S111).Base station/the base station controller 310 that receives this report send at this report response signal (BSAck Order) (S112).Then, synchronous modem is finished (Call Connection) (S113) to the asynchronous modem controller report with being connected of synchronous mobile communication system.

Now, the synchronous modem of portable terminal 10 is switching vocoder afterwards with the step of having finished being connected of synchronous mobile communication system (S113).In the process of doing like this, owing to reach the timing of switching vocoder up to mobile communication system before quiet period can appear, therefore according to the present invention, portable terminal 10 starts the timer that is set at predetermined timing, thereby makes the vocoder of portable terminal 10 can obtain in the timing of the vocoder that switches mobile communication system switching.

Simultaneously, base station/base station controller 310 joins to 320 reports of synchronous exchange center finishes (Handoff Complete) (S115), and (Mobile On Channel) finished (S116) to the 220 report handing-over of asynchronous switching center in synchronous exchange center 320.

The timing of switching the vocoder of mobile communication system is that the step of having finished to the 220 report handing-over of asynchronous switching center at synchronous exchange center 320 (S116) is implemented afterwards.According to the present invention, at the synchronous modem of portable terminal 10 after asynchronous modem controller report handing-over has been finished, the time durations that the handing-over of asynchronous switching center 220 in report synchronous exchange center 320 finished starts timer, and when timer operation is finished, the vocoder of portable terminal 10 is switched (S117) and meanwhile also the vocoder of mobile communication system switched (S118).

By doing like this, the vocoder of portable terminal 10 and mobile communication system switches simultaneously, thereby makes the time of origin minimum of quiet period.

Subsequently, the asynchronous 220 requesting node B/RNC of switching center remove and connect, and when receiving the response that this request is made in asynchronous switching center 220, to be connected releasing (IU Release order between asynchronous switching center 220 and the Node B/RNC, IU Release Complete) (S119, S120).

Then, after 320 handing-over has been finished from the portable terminal in during being in the audio call in the asynchronous mobile communiation system 10 to synchronous mobile communication system, when one of two portable terminals of calling out send the request of call disestablishment, with call release.Can by the portable terminal that is in the subscriber in the asynchronous mobile communiation system service area at first request call remove, perhaps can by the subscriber's who hands over to the synchronous mobile communication system service area portable terminal at first request call remove.

If the portable terminal call disestablishment in the asynchronous mobile communiation system service area, then asynchronous switching center 220 sends call release request message (Facilities Release) to synchronous exchange center 320, and 320 pairs of these message in synchronous exchange center that receive this message are made response (FacilitiesAck), thereby the trunk line of setting up between two switching centers is removed.

Second execution mode

Fig. 4 show used the present invention and wherein coexistence the another kind of execution mode of mobile communication system of asynchronous mobile communiation system and synchronous mobile communication system is arranged.

Fig. 5 and Fig. 6 are the flow charts that expression is handled according to the inter-system handover in the mobile communication system system shown in Fig. 4 of another embodiment of the present invention.

In Fig. 4,, therefore do not need here they are described in detail because the figure mark refers to unit same as in figure 1.

With reference to Fig. 4, different with Fig. 1, the switching center the 260, the 360th of asynchronous mobile communiation system 20 and synchronous mobile communication system 30 is interconnected with one another with functional unit 60 by intercommunication/mutually, and intercommunication/mutually will convert synchronization message from the asynchronous message that asynchronous switching center 260 sends to, this synchronization message be sent to synchronous exchange center 360 and the synchronous mobile communication information preparation is managed to database and to it with functional unit 60.(function is used in intercommunication mutually; IIF, 60)

In such network configuration, just in the service area of asynchronous mobile communiation system 20, using the portable terminal 10 of audio call periodically measures and Node B between signal strength signal intensity and and neighbor base station between signal strength signal intensity, and with measurement report to Node B.When signal strength signal intensity was lower than predetermined threshold, the handing-over incident had taken place via RNC to 260 reports of asynchronous switching center in Node B.At this moment, Node B/RNC210 sends portable terminal 10 detected contiguous emitter region information, base station IDs etc. to asynchronous switching center 260.

When receiving handover request message from RNC, asynchronous switching center 260 with reference to from judgement handover request message such as contiguous emitter region information that RNC receives, base station IDs be between the contiguous emitter region in the asynchronous mobile communiation system handing-over or to the handing-over of synchronous mobile communication system 30.

When in handover request is asynchronous mobile communiation system 20, being close to the handing-over between the emitter region, asynchronous switching center 260 carries out the handing-over to contiguous emitter region, and when handover request message was handing-over to synchronous mobile communication system 30, asynchronous switching center 260 carried out handing-over to synchronous exchange center 360 via IIF60.For this reason, IIF60 is converted to asynchronous message synchronization message and this synchronization message is sent to synchronous exchange center 360, and asynchronous switching center 220 must be in advance manages the information preparation of synchronous mobile communication system in database and to this database.This database comprises switching center's information, signaling point, relay line information relevant with dedicated channel or the like.IIF60 is according to handover request and synchronous mobile communication system Information Selection handing-over target switching center 320 from asynchronous switching center 260, and produce the charging ID that comprises handing-over target ID of switching center or the like, in follow-up handshaking, to use this charging ID.

Below with reference to the handing-over processing procedure shown in Fig. 5 and Fig. 6 detailed explanation Fig. 4.

With reference to Fig. 5 and Fig. 6, just in the service area of asynchronous mobile communiation system 20, using the portable terminal 10 of audio call when the service area of synchronous mobile communication system 30 moves, portable terminal 10 detects the signal from synchronous mobile communication system 30, and periodically measure from the signal strength signal intensity of the Node B of asynchronous mobile communiation system 20 and and contiguous emitter region (or Node B) between signal strength signal intensity and give Node B with measurement report.In view of the above, when the current Node B that links to each other with portable terminal 10 recognizes signal strength signal intensity between portable terminal 10 and this Node B when being lower than predetermined value, Node B via radio network controller (IU Rloc Required) to the 260 request handing-over (IU Reloc Required) of asynchronous switching center (S501).

Handover request message (IU Reloc Required) is included in the message of using in the synchronous mobile communication system relevant with handing-over.In addition, RNC sends the neighbor base station information (base station IDs) that receives from portable terminal 10, contiguous emitter region information etc., and asynchronous switching center 260 judges that according to these information handover request message are handing-over between the contiguous emitter region or to the handing-over of synchronous mobile communication system 30 in the asynchronous mobile communiation system.The handover request message (IU Reloc Required) that RNC sends to asynchronous switching center 260 comprises type of message, type of handover, source base station controller ID, target base station controller ID, RAB (wireless access operator) information and the information relevant with radio interface.

The asynchronous message (MAP Prep Handover Req) that the asynchronous switching center 260 that receives handover request message sends the request handing-over with functional unit 60 to intercommunication/mutually (S502).At this moment, asynchronous switching center 260 adds extension container for this asynchronous message and sends the asynchronous identification signal (MSISDN) of portable terminal 10 then, and this message comprises the parameter such as calling ID, Target Launch Zone ID, target radio network controller ID, MSISDN.

Then, intercommunication/send subscriber information (CallData Request) (S103) with the two stack home location registers 50 of functional unit 60 requests with reference to the asynchronous subscriber information (MSISDN) that receives from asynchronous switching center 260 mutually.In other words, intercommunication/mutually with the synchronizing network identifier of functional unit 60 request portable terminals 10 (MIN, ESN).In step S503, intercommunication/mutually can be by using the synchronization identifier information (MAP_SEND_IMSI) of asynchronous message to two stack home location register 50 request subscribers with functional unit 60.

Receive intercommunication/two stack home location registers 50 of the subscriber information request of usefulness functional unit 60 mutually and extract subscriber's synchronization identifier information (MIN by Query Database, ESN), with to intercommunication/send (Call Data Req Ack) (S104) with functional unit 60 mutually.Receive the intercommunication of synchronization identifier information/mutually to 360 handing-over (Facilities Directive2) of synchronous exchange center (S505), and synchronous exchange center 360 to the 310 request handing-over (Handoff Request) of base station controller/base station (S506) with functional unit 60 indications.Here, the synchronizing network message (Call Data Request) of request subscriber's synchronization identifier information comprises such as charging ID, numeral (promptly, MSISDN) and so on parameter, and response message (Call Data Req Ack) comprises the parameter such as ESN, MIN, MSCID.

At this moment, when using asynchronous message (MAP_SEND_IMSI) to ask subscriber's synchronous network identifier information, be included in parameter in this asynchronous message and comprise and call ID, MSISDN, IMSI, ESN etc.

Here, intercommunication/producing charging ID with functional unit 60 before to synchronous exchange center 360 transmission handing-over Indication messages (Facilities Directive2) mutually, charging ID being covered in this handing-over Indication message (Facilities Directive2), and send the handing-over Indication message that comprises corresponding to the inner exchanging central circuit ID in each handing-over time interval.Here, charging ID comprises the id information at the synchronous exchange center 360 that will be connected to asynchronous switching center 260.

Base station/the base station controller 310 that receives from the handover request at synchronous exchange center 320 sends NULL frame (Null forward communication channels frame) via forward communication channels to the synchronous modem of portable terminal 10, thereby distribute forward channel (S507), base station/base station controller 310 sends at the response message (Handoff RequestAck) of this handover request (S508) to synchronous exchange center 320 then.In addition, synchronous exchange center 320 sends at the response message (Facilities Directive2 Ack) of handing-over indication (S509) with functional unit 60 to intercommunication/mutually, and intercommunication/mutually sends at the response message (MAP Preq Handover Resp) of the handover request in the step 502 (S510) to asynchronous switching center with functional unit 60.Thus, between asynchronous switching center 260 and synchronous exchange center 360, set up trunk line.

More specifically, intercommunication/mutually is provided with mapping between dedicated channel (logical trunk is provided with identifier) and the physical relay line with functional unit 60, and this information setting is given the inner exchanging central circuit ID (InterMSCCircuitID) of the handover request message (Facilities Directive2) that will send to synchronous exchange center 360, and when having sent response message (Facilities Directive2 Ack) from synchronous exchange center 360, trunk line is set up between asynchronous switching center 260 and synchronous exchange center 320.The handover request message (Facilities Directive2) that sends between intercommunication/mutually with functional unit 60 and synchronous exchange center 360 comprises the parameter such as charging ID, ESN, inner exchanging central circuit ID, MIN, and response message (FacilitiesDirective2 Ack) comprises the parameter such as CDMA Channel data, CDMA Channel tabulation.

Like this, when having set up trunk line between asynchronous switching center 260 and the synchronous exchange center 360, asynchronous switching center 260 finishes (IU Relocation Command) (S511) to the report of Node B/RNC210 at the resource allocation of handing-over, and the Node B/RNC210 request portable terminal 10 that receives this report carry out to asynchronous modem controller handing-over (Handoverfrom UTRAN order) (S512).Here, the message (IURelocation order) finished of report resource allocation comprises the parameter such as type of message, RRC container, the RAB that will remove tabulate.

After this, the asynchronous modem controller of portable terminal 10 to synchronous modem transmitting channel assignment information (Channel Assignment) (S513), and intercommunication/insert signal (MAP Process Access Signaling Req) (S514) with functional unit 60 to 260 requests of asynchronous switching center mutually, this access signal comprise calls ID, Application Protocol Data Unit (APDU), selected wireless resource information or the like.

Then, the asynchronous modem controller of portable terminal 10 to synchronous modem transmitting channel assignment information (Channel Assignment) (S515), and sent frame or lead code (Reverse Traffic Channel Frame of Traffic Channel Preamble) (S110) afterwards via reverse channel communication to the base station/base station controller 310 of synchronous mobile communication system at the synchronous modem of portable terminal 10, synchronous modem report handing-over is finished (Handoff CompletionMessage) (S111).Base station/the base station controller 310 that receives this report send at this report response signal (BS Ack Order) (S112).Thus, being connected between the synchronous modem of portable terminal and the synchronous mobile communication system finished, and the synchronous modem of portable terminal is finished (CallConnection) (S518) to the asynchronous modem controller report with being connected of synchronous mobile communication system.

Now, the synchronous modem of portable terminal 10 is switching vocoder afterwards with the step of having finished being connected of synchronous mobile communication system (S518).In the process of doing like this, owing to reach the timing of switching vocoder up to mobile communication system before quiet period can appear, therefore according to the present invention, portable terminal 10 starts the timer that is set at predetermined timing, thereby makes the vocoder of portable terminal 10 can obtain switching (S519) in the timing of the vocoder that switches mobile communication system.

The timing of switching the vocoder of mobile communication system is to implement after the step S521 that the 260 report handing-over of asynchronous switching center have been finished at synchronous exchange center 320.According to the present invention, at the synchronous modem of portable terminal 10 after asynchronous modem controller report handing-over has been finished, the time durations that the handing-over of asynchronous switching center 220 in report synchronous exchange center 320 finished starts timer, and when timer operation is finished, the vocoder of portable terminal 10 is switched (S522) and meanwhile also the vocoder of mobile communication system switched (S523).

After this, intercommunication/remove connection (MAPSend End Siganl Req) (S524) with the asynchronous switching center 260 of functional unit 60 requests mutually, thereby will be connected releasing (IU Release order between asynchronous switching center 260 and the Node B/RNC, IU Release Complete) (S525, S526).

Then, after the handing-over from the portable terminal in during being in the audio call in the asynchronous mobile communiation system 10 to synchronous mobile communication system has been finished according to above-mentioned steps, when one of two portable terminals of calling out send the request of call disestablishment, with call release.Can by the portable terminal that is in the subscriber in the asynchronous mobile communiation system service area at first request call remove, perhaps can by the subscriber's who hands over to the synchronous mobile communication system service area portable terminal at first request call remove.

If the portable terminal call disestablishment in the asynchronous mobile communiation system service area, then asynchronous switching center 260 is to intercommunication/usefulness functional unit 60 sends call release request messages (FacilitiesRelease) mutually, and receive the intercommunication of this message/make response (Facilities Ack) with 60 pairs of these message of functional unit mutually, thereby the trunk line of setting up between two switching centers is removed.Here, call release request message (Facilities Release) comprises the parameter such as inner MSC circuit I D, releasing reason, charging ID, MIN, and response message (Facilities Ack) comprises the parameter such as charging ID.

The 3rd execution mode

Fig. 7 and Fig. 8 show the flow chart according to the inter-system handover process in the mobile communications network shown in Fig. 3 of another embodiment of the invention, wherein asynchronous switching center and synchronous exchange center are by intercommunication/use functional unit interconnective mutually, and have used ISUP (messaging protocol between the switching center).

Just in the service area of asynchronous mobile communiation system 30, using the portable terminal 20 of audio call when the service area of synchronous mobile communication system 30 moves, the signal that portable terminal 10 detects from synchronous mobile communication system 30, and periodically measure from the signal strength signal intensity of the Node B of asynchronous mobile communiation system 20 and and contiguous emitter region (or Node B) between signal strength signal intensity, and give Node B with measurement report.After this, when the current Node B that is connected with portable terminal 10 recognizes signal strength signal intensity between portable terminal 10 and the Node B when being lower than predetermined value, Node B via radio network controller (RNC) to the 260 request handing-over (IU RelocRequired) of asynchronous switching center (S601).

This handover request message (IU Reloc Required) is included in the message of using in the synchronous mobile communication system relevant with handing-over.In addition, RNC sends the neighbor base station information that receives from portable terminal 10, contiguous emitter region information (base station IDs) etc., and asynchronous switching center 260 judges that according to these information handover request message are handing-over between the contiguous emitter region or to the handing-over of synchronous mobile communication system 30 in the asynchronous mobile communiation system.The handover request message (IU Reloc Required) that RNC sends to asynchronous switching center 260 comprises type of message, type of handover, handing-over reason, source base station controller ID, target base station controller ID, RAB (wireless access operator) information and the information relevant with radio interface.In addition, RNC also comprises the Old BSS To NewBSS information parameter that is included in the handover request message that contains the information of using relevant with handing-over in synchronous mobile communication system.

The asynchronous message (MAP Prep Handover Req) that the asynchronous switching center 260 that receives this handover request message sends the request handing-over with functional unit 60 to intercommunication/mutually (S602).At this moment, asynchronous switching center 260 adds extension container for this asynchronous message and sends the asynchronous identification signal (MSISDN) of portable terminal 10 then, and this asynchronous message comprises the parameter such as calling ID, Target Launch Zone ID, target radio network controller ID, MSISDN.

After this, intercommunication/send subscriber information (CallData Request) (S603) with the two stack home location registers 50 of functional unit 60 requests with reference to the asynchronous subscriber information (MSISDN) that receives from asynchronous switching center 260 mutually.In other words, intercommunication/mutually with the asynchronous identifier of functional unit 60 request portable terminals 10 (MIN, ESN).In step S103, intercommunication/mutually can be by using the synchronous network identifier information (MAP_SEND_IMSI) of asynchronous message to two stack home location register 50 request subscribers with functional unit 60.

Receive from the two stack home location register Query Databases of intercommunication/subscriber information request of usefulness functional unit 60 mutually and the synchronous network identifier information (MIN of extraction respective subscriber, ESN), send it to intercommunication/use functional unit 60 (Call Data Req Ack) mutually (S604) then.Here, the synchronizing network message (Call DataRequest) of request subscriber's synchronization identifier information comprises such as charging ID, numeral (promptly, MSISDN) and so on parameter, and response message (Call Data Req Ack) comprises the parameter such as ESN, MIN, MSCID.Simultaneously, when using asynchronous message (MSP_SEND_IMSI) to ask subscriber's synchronous network identifier information, be included in parameter in this message and comprise and call ID, MSISDN, IMSI, ESN etc.

Intercommunication/under the situation that receives subscriber information from two stack home location registers 50, indicate synchronous exchange center 360 to join (Facilities Directive2) (S105) with functional unit 60 mutually, and synchronous exchange center 360 is to the 310 request handing-over (HandoffRequest) of base station controller/base station (S606).

Equally, intercommunication/producing charging ID with functional unit 60 before to synchronous exchange center 360 transmission handing-over Indication messages (Facilities Directive2) mutually, this charging ID being covered in handing-over Indication message (Facilities Directive2), and send the handing-over Indication message that comprises corresponding to the inner exchanging central circuit ID in each handing-over time interval.Here, charging ID comprises the id information at the synchronous exchange center 360 that will be connected to asynchronous switching center 260.

Base station/the base station controller 310 that receives from the handover request at synchronous exchange center 320 sends NULL frame (Null forward communication channels frame) via forward communication channels to the synchronous modem of portable terminal 10, thereby distribute forward channel (S607), base station/base station controller 310 sends at the response message (Handoff RequestAck) of this handover request (S608) to synchronous exchange center 320 then.In addition, the response message (Facilities Directive2 Ack) that switching center 320 sends at the handing-over indication with functional unit 60 to intercommunication/mutually, and intercommunication/mutually sends at the response message (MAP Preq Handover Resp) of the handover request among the step S602 (S610) to asynchronous switching center 260 with functional unit 60.Thus, between asynchronous switching center 260 and synchronous exchange center 360, set up trunk line.

More specifically, intercommunication/mutually is provided with mapping between dedicated channel (logical trunk is provided with identifier) and the physical relay line with functional unit 60, and with the inner exchanging central circuit ID (InterMSCCircuitID) of this information setting to the handover request message that will send to synchronous exchange center 360 (Facilities Directive2), and when sending response message (Facilities Directive2 Ack) from synchronous exchange center 360, trunk line is able to set up between asynchronous switching center 260 and synchronous exchange center 360.The handover request message (Facilities Directive2) that sends between asynchronous switching center 220 and synchronous exchange center 360 comprises the parameter that comprises charging ID, ESN, inner exchanging central circuit ID, MIN etc., and response message (Facilities Directive2Ack) comprises the parameter such as CDMA Channel data, CDMA Channel tabulation.

Then, asynchronous switching center 260 is to intercommunication/usefulness functional unit 60 sends IAM (initial address message) mutually, and intercommunication/send ACM (message is finished in the address) with functional unit 60 at this IAM mutually, thereby between asynchronous switching center 260 and synchronous exchange center 360, set up trunk line, thus route (S611) has been carried out in calling.Between switching center, set up the message of trunk line to send according to ISUP.

Like this, when having set up trunk line between asynchronous switching center 220 and the synchronous exchange center 320, asynchronous switching center 220 finishes (IU Relocation Command) (S107) to the report of Node B/RNC210 at the resource allocation of handing-over, and the Node B/RNC 210 request portable terminals 10 that receive this report carry out to asynchronous modem controller handing-over (Handoverfrom UTRAN order) (S108).Here, the message (IURelocation order) finished of report resource allocation comprises the parameter such as type of message, RRC container, the RAB that will remove tabulate.

After this, the asynchronous modem controller of portable terminal to synchronous modem transmitting channel assignment information (Channel Assignment) (S115), and intercommunication/insert signal (MAP Process Access Signaling Req) (S116) with functional unit 60 to 260 requests of asynchronous switching center mutually, this access signal comprise calls ID, Application Protocol Data Unit (APDU), selected wireless resource information or the like.

In addition, the synchronous modem of portable terminal 10 via reverse channel communication (S617) to base station/base station controller 310 transmit frames of synchronous mobile communication system or lead code (Reverse Traffic ChannelFrame of Traffic Channel Preamble), and the report handing-over is finished (Handoff Completion Message) (S618).Base station/the base station controller 310 that receives this report send at this report response signal (BS Ack Order) (S619).Then, synchronous modem is finished (Call Connection) (S620) to the asynchronous modem controller report with being connected of synchronous mobile communication system.

Now, the synchronous modem of portable terminal 10 is switching vocoder afterwards with the step of having finished being connected of synchronous mobile communication system (S620).In the process of doing like this, owing to reach the timing of switching vocoder up to mobile communication system before quiet period can appear, therefore according to the present invention, portable terminal 10 starts the timer that is set at predetermined timing, thereby makes the vocoder of portable terminal 10 can obtain switching (S621) in the timing of the vocoder that switches mobile communication system.

Simultaneously, base station/base station controller 310 joins to 320 reports of synchronous exchange center finishes (HandoffComplete) (S115), and (Mobile On Channel) finished (S116) to the 220 report handing-over of asynchronous switching center in synchronous exchange center 320.

The timing of switching the vocoder of mobile communication system is to implement after the step S116 that the 220 report handing-over of asynchronous switching center have been finished at synchronous exchange center 320.According to the present invention, at the synchronous modem of portable terminal 10 after asynchronous modem controller report handing-over has been finished, the time durations that the handing-over of asynchronous switching center 220 in report synchronous exchange center 320 finished starts timer, and when timer operation is finished, the vocoder of portable terminal 10 is switched (S117) and meanwhile also the vocoder of mobile communication system switched (S118).

Then, intercommunication/mutually with the asynchronous switching center 260 of functional unit 60 requests remove connect (MAPSend End Signal Req) (S626), (S627) and with the releasing that is connected between asynchronous switching center 260 and the Node B/RNC (IU Release orders to send message (ANSWER) that report synchronous exchange centers 360 have been connected with portable terminal to asynchronous switching center 260, IU ReleaseComplete) (S628, S629).

Then, after 320 handing-over has been finished from the portable terminal in during being in the audio call in the asynchronous mobile communiation system 10 to synchronous mobile communication system, when one of two portable terminals of calling out are asked, with call release.Can by the portable terminal that is in the subscriber in the asynchronous mobile communiation system service area at first request call remove, perhaps can by the subscriber's who hands over to the synchronous mobile communication system service area portable terminal at first request call remove.Will the explain situation of the mobile terminal request call release that is in the subscriber in the asynchronous mobile communiation system service area of present embodiment.

When the mobile communication terminal call disestablishment, with the call release between asynchronous switching center 260 and the synchronous exchange center 360 (Call Release) (S630), and with the releasing of the connection between the switching center (Release) (S631).After this, asynchronous switching center 260 finishes (MAP Send End Signal Resp) (S632) to intercommunication/mutually with the releasing that functional unit 60 reports connect, intercommunication/send call release request message (FacilitiesRelease) with functional unit 60 to synchronous exchange center 360 mutually, and 360 pairs of these call release request messages in synchronous exchange center are made response (Facilities Ack), thereby the trunk line of setting up between the switching center is removed (S634).Here, call release request message (Facilities Release) comprises the parameter such as inner MSC circuit I D, releasing reason, charging ID, MIN, and response message (Facilities Ack) comprises the parameter such as charging ID.

According to the present invention, asynchronous switching center judge call release message be in the asynchronous mobile communiation system handing-over or to the handing-over of synchronous mobile communication system.In addition, when it being identified as when being handing-over to synchronous mobile communication system, asynchronous switching center by to use intercommunication/use functional unit (IIF) to join mutually when switching center sends and receives from synchronous mobile communication system as transducer.For this reason, intercommunication/mutually with functional unit must be in advance with the synchronous mobile communication system information preparation in database and store this database.

And, in order to solve the problem that quiet period after portable terminal switches vocoder, before mobile communication system is switched vocoder, can occur, the vocoder of mobile communication system and portable terminal is switched in the present invention simultaneously, so that the quiet period minimum when joining during the audio call.

Though the present invention provides in a particular manner and introduces with reference to its preferred implementation, but those skilled in the art will appreciate that, can carry out change on various forms and the details to it, and can not exceed the scope of the present invention that claims contain.

Claims

1. mode mobile terminal handover method from the asynchronous mobile communiation system to the synchronous mobile communication system during calling out said method comprising the steps of:

Asynchronous switching center receives the handover request of described portable terminal, and judge described handover request be between the contiguous emitter region in the described asynchronous mobile communiation system handing-over or to the handing-over of described synchronous mobile communication system;

The indication of described asynchronous switching center joins to the synchronous exchange center;

Mind-set base station in the described synchronous exchange/base station controller request handing-over;

Described base station/base station controller is distributed to described portable terminal with forward communication channels, and to the response message of described synchronous exchange center transmission at handover request;

The asynchronous switching center of mind-set sends the response message at the handing-over indication in the described synchronous exchange;

Between described asynchronous switching center and described synchronous exchange center, set up trunk line;

Described asynchronous switching center's report Node B/radio network controller (RNC) is finished at the resource allocation of handing-over;

Described Node B/RNC asks described portable terminal to carry out handing-over to the asynchronous modem controller of described portable terminal;

Described asynchronous modem controller is to the synchronous modem transmitting channel assignment information of described portable terminal;

Described synchronous modem, and is finished to the report handing-over of described base station/base station controller to described base station/base station controller transmit frame or lead code via reverse channel communication;

Described base station/base station controller sends the response signal at the report of described synchronous modem;

Described synchronous modem is finished with being connected of described synchronous mobile communication system to described asynchronous modem controller report;

Described portable terminal starts the timer that is set at predetermined timing;

Described base station/base station controller is finished to the report handing-over of described synchronous exchange center;

The report handing-over of the described asynchronous switching center of mind-set is finished in the described synchronous exchange;

When timer operation is finished, the vocoder of described portable terminal is switched and meanwhile also the vocoder of described mobile communication system switched; And

Remove being connected between described asynchronous switching center and the described Node B/RNC.

2. method according to claim 1, wherein said asynchronous mobile communiation system is transferred according to message relevant with handing-over and the following parameter request used in the described synchronous mobile communication system, described parameter comprises contiguous emitter region information, neighbor base station information, type of handover, handing-over reason, source base station controller ID, target base station controller ID, the RAB information and the information relevant with radio interface of described portable terminal, and wherein RAB represents wireless access operator.

3. method according to claim 1, wherein the described handover request from described asynchronous switching center to described synchronous exchange center comprises the asynchronous identification number (MSISDN) of described portable terminal.

4. method according to claim 3, wherein the described handover request from described asynchronous switching center to described synchronous exchange center comprises at least one parameter in the middle of charging ID, ESN (Electronic Serial Number), inner exchanging central circuit ID and MIN (mobile identification number) parameter, and described synchronous mobile communication system comprises CDMA Channel data parameters or CDMA Channel list parameter at the response message of described handover request.

5. method according to claim 1, wherein in the step of connecting between the described asynchronous switching center of described releasing and described Node B/radio network controller, described asynchronous switching center connects to described Node B/radio network controller request and removes, and described then asynchronous switching center receives to connect to remove from described Node B/radio network controller and finishes.

6. method according to claim 1, wherein said handover request comprises: comprise the described synchronous exchange center that will link to each other with described asynchronous switching center id information charging ID and corresponding to each the handing-over time interval inner exchanging central circuit ID (InterMSCCircuitID).

7. method according to claim 1, wherein in the step that described asynchronous switching center's report Node B/radio network controller (RNC) has been finished at the resource allocation of handing-over, the message that report has been finished at the resource allocation of handing-over comprises the parameter of the RAB tabulation that comprises type of message and will remove, and wherein RAB represents wireless access operator.

8. method according to claim 1, wherein after the step of connecting between the described asynchronous switching center of described releasing and described Node B/radio network controller, when one of portable terminal of calling out from two receives the call release request, the switching center that receives described call release request sends to the synchronous exchange center with described call release request message, and when response was made to this in the synchronous exchange center, the trunk line of setting up between described asynchronous switching center and described synchronous exchange center was removed.

Asynchronous mobile communiation system and synchronous mobile communication system coexist as wherein and described asynchronous mobile communiation system and described synchronous mobile communication system mobile communication system by intercommunication/be connected with functional unit mutually in, a kind of handover method that is used to allow to DBDM portable terminal quiet period minimum during audio call of communicating with described asynchronous mobile communiation system and described synchronous mobile communication system said method comprising the steps of:

The asynchronous switching center of described asynchronous mobile communiation system that receives handover request message from the radio network controller of described asynchronous mobile communiation system is to described intercommunication/send with the functional unit mutually asynchronous message of request handing-over, and described intercommunication/mutually sends the subscriber information of described portable terminal and receives described subscriber information with the two stack home location registers of function unit requests, according to described portable terminal detected contiguous emitter region information and base station IDs judge described handover request be in the asynchronous mobile communiation system handing-over or to the handing-over of synchronous mobile communication system;

Described intercommunication/join to the indication of the synchronous exchange center of described synchronous mobile communication system with functional unit mutually, and base station/base station controller request of the described synchronous mobile communication system of mind-set joins in the described synchronous exchange;

Described base station/base station controller distributes forward communication channels to described portable terminal, and to the response message of described synchronous exchange center transmission at this handover request;

The described intercommunication of mind-set in the described synchronous exchange/send the response message of indicating with functional unit mutually at described handing-over, and described intercommunication/use functional unit mutually, thereby between described asynchronous switching center and described synchronous exchange center, set up trunk line to the response message of described asynchronous switching center transmission at handover request;

Described asynchronous switching center finishes at the resource allocation of handing-over to the radio network controller report of described asynchronous mobile communiation system;

Described radio network controller joins to described portable terminal indication via the Node B of described asynchronous mobile communiation system, so that described portable terminal is switched to the synchronous mobile communication system connection mode;

Described intercommunication/send to described asynchronous switching center with functional unit mutually and insert signal;

To described base station/base station controller transmit frame and lead code, and finish by report handing-over via reverse channel communication for described portable terminal;

Described asynchronous switching center starts timer;

Described portable terminal to the report of described base station/base station controller with after being connected of described synchronous mobile communication system finishes, start timer, and when timer operation is finished, vocoder to portable terminal switches, and meanwhile also the vocoder of mobile communication system is switched; With

Remove being connected between described asynchronous switching center and the described Node B/described radio network controller.

10. method according to claim 9, the described step that wherein said radio network controller sends handover request message to described asynchronous switching center is included in message and the following parameter of using in the described synchronous communication system relevant with handing-over, described parameter comprises contiguous emitter region information, neighbor base station information, type of handover, handing-over reason, source base station controller ID, target base station controller ID, the RAB information and the information relevant with radio interface of described portable terminal, and wherein RAB represents wireless access operator.

11. method according to claim 9 wherein comprises the asynchronous identification number (MSISDN) of described portable terminal in described asynchronous switching center to described intercommunication/described handover request message that sends with functional unit mutually.

12. method according to claim 9, wherein said intercommunication/subscriber information that receives from described pair of stack home location register mutually with functional unit comprise described portable terminal the synchronizing network identifier (MIN, ESN).

13. method according to claim 9, wherein said intercommunication/use functional unit mutually to the described step use synchronization message of the subscriber information of the described pair of described portable terminal of stack home location register request or any one in the asynchronous message.

14. method according to claim 9, wherein before sending the handing-over Indication message to described synchronous exchange center, described intercommunication/mutual the id information that produces the synchronous exchange center that will link to each other with functional unit with described asynchronous switching center, so that this id information is covered in the described handing-over Indication message, and send the handing-over Indication message that comprises corresponding to the inner exchanging central circuit ID (InterMSCCircuitID) in each handing-over time interval.

15. method according to claim 9, wherein said asynchronous switching center sends to that described intercommunication/the described handover request message with functional unit comprises the parameter that comprises charging ID, ESN (Electronic Serial Number), inner exchanging central circuit ID and MIN (mobile identification number) mutually, and described synchronous exchange center sends to, and described intercommunication/response message with functional unit comprises the parameter that comprises CDMA Channel data and CDMA Channel tabulation mutually.

16. method according to claim 9 is wherein reported the RAB tabulation that the report of having finished at the resource allocation of handing-over comprises type of message, RRC container and will remove, wherein RAB represents wireless access operator.

17. comprising, method according to claim 9, wherein said access signal call ID, Application Protocol Data Unit (APDU) and selected wireless resource information.

18. method according to claim 9, wherein after the step of connecting of removing between described asynchronous switching center and the described Node B/radio network controller, when one of portable terminal of calling out from two receives the call release request, the switching center that receives described call release request sends to described intercommunication/use mutually functional unit with described call release request message, and described intercommunication/this is made response with functional unit mutually, thereby the trunk line of setting up between described asynchronous switching center and the described synchronous exchange center is removed.

19. method according to claim 18, wherein said call release request message comprise the parameter that comprises inner MSC circuit I D, removes reason, charging ID and MIN, and described response message comprises the parameter that comprises charging ID.

20. method according to claim 9, wherein in setting up the step of trunk line,

Described asynchronous switching center is to described intercommunication/send initial address message with functional unit mutually, and described intercommunication/send the address with functional unit at this initial address message mutually to finish message, thereby between described asynchronous switching center and described synchronous exchange center, set up trunk line.

21. method according to claim 20, the described asynchronous switching center of wherein said releasing may further comprise the steps with step of connecting between described Node B/radio network controller: described intercommunication/remove this with the described asynchronous switching center of function unit requests mutually to be connected, and report that to described asynchronous switching center described synchronous exchange center and described portable terminal are connected to each other; And remove being connected between described asynchronous switching center and the described Node B/radio network controller.

22. method according to claim 20, wherein said asynchronous switching center is to described intercommunication/step with functional unit transmission handover request message is included in message and the following parameter of using in the described synchronous communication system relevant with handing-over mutually, described parameter comprises contiguous emitter region information, neighbor base station information, type of handover, handing-over reason, source base station controller ID, target base station controller ID, the RAB information and the information relevant with radio interface of described portable terminal, and wherein RAB represents wireless access operator.

23. method according to claim 20, wherein in described asynchronous switching center to described intercommunication/send in the described step of handover request mutually with functional unit, described asynchronous switching center sends the asynchronous identification number (MSISDN) of described portable terminal together.

24. method according to claim 20, wherein said intercommunication/subscriber information that receives from described pair of stack home location register mutually with processing unit comprise described portable terminal the synchronizing network identifier (MIN, ESN).

25. method according to claim 20, wherein said intercommunication/use functional unit mutually to the described step use synchronization message of the subscriber information of the described pair of described portable terminal of stack home location register request or any one in the asynchronous message.

26. method according to claim 20, wherein before sending the handing-over Indication message to described synchronous exchange center, described intercommunication/mutual the id information that produces the synchronous exchange center that will link to each other with functional unit with described asynchronous switching center, so that this id information is covered in the described handing-over Indication message, and send the handing-over Indication message that comprises corresponding to the inner exchanging central circuit ID (InterMSCCircuitID) in each handing-over time interval.

27. method according to claim 20, wherein said intercommunication/mutually comprises the parameter that comprises charging ID, ESN, inner exchanging central circuit ID and MIN with the described handover request message that functional unit sends to described synchronous exchange center, and described synchronous exchange center sends to described intercommunication/mutually and comprises with the response message of functional unit and comprise the parameter that CDMA Channel data and CDMA Channel are tabulated.

28. method according to claim 20, wherein said resource allocation are finished the RAB tabulation that message comprises type of message, RRC container and will remove, wherein RAB represents wireless access operator.

29. comprising, method according to claim 20, wherein said access signal call ID, Application Protocol Data Unit (APDU) and selected wireless resource information.

30. method according to claim 20, after the step of connecting of removing between described asynchronous switching center and the described Node B/radio network controller, when one of portable terminal of calling out from two receives the call release request, the switching center that receives described call release request is to described intercommunication/trunk line between the usefulness function unit requests switching center is removed and call release mutually, described intercommunication/described call release request message is sent to the switching center that does not have request call to remove with functional unit mutually, and in described intercommunication/mutually send response message with functional unit, the trunk line of setting up between described asynchronous switching center and the described synchronous exchange center is disengaged in the switching center that receives described call release request message.

31. method according to claim 22, wherein said call release request message comprise the parameter that comprises inner MSC circuit I D, removes reason, charging ID and MIN, and described response message comprises the parameter that comprises charging ID.

32. method according to claim 20, wherein after the step of connecting between the described asynchronous switching center of described releasing and described Node B/radio network controller, described method is further comprising the steps of:

In the calling of removing in the call disestablishment in the service area of described portable terminal at asynchronous mobile communiation system between described asynchronous switching center and the described synchronous exchange center;

Removing described asynchronous switching center is connected with trunk line between the described synchronous exchange center; With

Described asynchronous switching center to described intercommunication/connect mutually with the functional unit report remove finished in, described intercommunication/send the call release request message with functional unit to described synchronous exchange center mutually, and response is made to described call release request message in described synchronous exchange center, thereby removes described trunk line setting.

33. method according to claim 32, wherein said call release request message comprise the parameter that comprises inner MSC circuit I D, removes reason, charging ID and MIN, and described response comprises the parameter that comprises charging ID.