CN1910834A - Method for controlling multi-mode multi-band mobile communication terminal for hand-over between asynchronous communication network and synchronous communication network and mobile communication syste - Google Patents
Method for controlling multi-mode multi-band mobile communication terminal for hand-over between asynchronous communication network and synchronous communication network and mobile communication syste Download PDFInfo
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- CN1910834A CN1910834A CNA2005800020131A CN200580002013A CN1910834A CN 1910834 A CN1910834 A CN 1910834A CN A2005800020131 A CNA2005800020131 A CN A2005800020131A CN 200580002013 A CN200580002013 A CN 200580002013A CN 1910834 A CN1910834 A CN 1910834A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Abstract
The present invention relates to a method of controlling communication terminal and mobile communication system therefor. In the mobile communication terminal control method, a synchronous base station of a synchronous area placed at the boundary region of an asynchronous area transmits a dummy pilot signal at the same frequency as that of a signal used in the asynchronous mobile communication system and drives a modem unit of the mobile communication terminal moving from the asynchronous area to the synchronous area. A handover cell is constructed at the boundary between synchronous and asynchronous areas, and a handover base station in the handover cell transmits a signal including system information at the same frequency as that of a signal used in the asynchronous mobile communication system, thus driving the synchronous modem unit of the mobile communication terminal entering the handover cell.
Description
Technical field
Generally speaking, the present invention relates to control the method for mobile communication terminal, particularly, relate to method and the mobile communication system thereof of controlling mobile communication terminal, this system and method utilizes the modulator-demodulator that has the signal driving multimode multi-mode mobile communication terminal of same frequency with asynchronous signal when the switching of carrying out between asynchronous and the synchronizing network.
Background technology
Along with the development of mobile communication technology and the progress of communication network, various types of mobile communication system have been developed.And the global roaming problem between a plurality of mobile communication system that cause for the development that solves owing to various types of mobile communication system has been developed international mobile telecommunication (IMT)-2000 system already.The IMT-2000 system can be classified into based on the synchronous mode system of code division multiple access (CDMA) 2000 with based on the asynchronous mode system of wideband CDMA (WCDMA).
In addition, in order to support the global roaming between a plurality of mobile communication system also to develop the mobile communication terminal (multimode multifrequency terminal) that can be used in synchronous and asynchronous mode system.Utilize this mobile communication terminal, can in asynchronous mode system realm and synchronous mode system realm, use dissimilar services.
At present, asynchronous mobile communiation system is structured in the zone with a large amount of service requests, thereby makes the synchronous mode mobile communication system develop into the form that its coverage comprises the coverage of asynchronous mode system.In this course, when the user is mobile between asynchronous mobile communiation system and synchronous mobile communication system, need between these systems, switch so that continuous service is provided.
For from the switching of asynchronous mobile communiation system to synchronous mobile communication system, it is highly important that at the viability that uses asynchronous mobile communiation system to provide, detect the signal of synchronous mobile communication system effectively.For this operation, in order to switch, the multimode multi-mode mobile communication terminal must drive modulator-demodulator and be connected (interface with) with synchronous mobile communication system in the service of using asynchronous mobile communiation system to provide, and the sub-district that must search will switch therein.
But, because asynchronous and synchronous mobile communication system uses different communication meanss, therefore is difficult in and implements between the system to switch, and only also there is limitation in the changing method that proposed of the utilization probability that improves successful switch.In addition, because the multimode multi-mode mobile communication terminal has two modulator-demodulators, determine that therefore the time point that these two modulator-demodulators are driven and cut out is extremely important.
Particularly, the multimode multi-mode mobile communication terminal need switch at the viability that uses asynchronous mobile communiation system to provide, need the time in about 10 seconds to drive the synchronous modem unit of communicating by letter with synchronous mobile communication system, and must with drive synchronous modem unit before communicating by letter of asynchronous mobile communiation system is interrupted.There is following shortcoming in this: if synchronous modem unit fails to obtain to drive before the multimode multi-mode mobile communication terminal leaves the asynchronous mobile communiation system zone fully, switch so and just can't successfully carry out, calling will be interrupted, if and synchronous modem unit is unnecessarily driven in advance, two modulator-demodulators will be opened simultaneously so, thereby have increased power consumption.Like this, owing to can not know the time point that will drive synchronous modem unit definitely, with regard to the problem that has occurred increasing such as communication disruption and power consumption when switching.
As mentioned above, research for the method that is used to control the multimode multi-mode mobile communication terminal when switching is at present also insufficient, therefore there are some shortcomings, just, from asynchronous mobile communiation system when synchronous mobile communication system switches, be difficult to the service that provides continuous, and switch the needed time and increase greatly.
Summary of the invention
Therefore, at the problems referred to above the present invention is proposed, the purpose of this invention is to provide a kind of method and mobile communication system thereof that is used to control the multimode multi-mode mobile communication terminal, when wherein between asynchronous mobile communiation system and synchronous mobile communication system, switching, the signal that the signal that uses in this method and system utilization and the asynchronous mobile communiation system has same frequency drives the synchronous modem of multimode multi-mode mobile communication terminal, thereby prevents from communication disruption to occur and continuous service is provided thus when switching.
Description of drawings
Fig. 1 illustrates the configuration of having used mobile communications network of the present invention;
Fig. 2 illustrates the structure that is applied to mobile communication terminal of the present invention;
Fig. 3 is illustrated in the method for utilizing pilot beacon (dummy pilot) signal controlling mobile communication terminal in the mobile communications network of asynchronous and synchronizing network coexistence;
Fig. 4 illustrates the variation of moving of dummy pilot signal intensity along with mobile communication terminal;
Fig. 5 is the method flow diagram that is used to control mobile communication terminal according to first embodiment of the invention;
Fig. 6 is the method flow diagram that is used to control mobile communication terminal according to second embodiment of the invention;
Utilize switching cell to control the method for mobile communication terminal in the mobile communications network that Fig. 7 is illustrated in synchronously and asynchronous network coexists;
Fig. 8 is the method flow diagram that is used to control mobile communication terminal according to third embodiment of the invention;
Fig. 9 is the method flow diagram that is used to control mobile communication terminal according to fourth embodiment of the invention.
Embodiment
To achieve these goals, the invention provides and be used to control the method that the multimode multi-mode mobile communication terminal switches, this multimode multi-mode mobile communication terminal is equipped with asynchronous modem unit and synchronous modem unit, and in the mobile communications network of asynchronous and synchronous mobile communication system coexistence, this terminal can used the viability that is provided by asynchronous mobile communiation system, reception is from the signal of synchronous mobile communication system, this method comprises first step: when the described mobile communication terminal shift-in retaining zone of the service that provided by asynchronous mobile communiation system is provided, the asynchronous modem unit of described mobile communication terminal receives the dummy pilot signal from synchronous mobile communication system, drive the synchronous modem unit of described mobile communication terminal, search will be carried out the sub-district of switching therein, search will be carried out therein the Search Results notice asynchronous mobile communiation system of the sub-district of switching, when when asynchronous mobile communiation system is received switching command, to the synchronous modem unit channel assignment message; Second step: switch vocoder and close asynchronous modem unit; Third step: the synchronous modem unit realization is synchronous with synchronous mobile communication system.
In addition, the invention provides and be used to control the method that the multimode multi-mode mobile communication terminal switches, this multimode multi-mode mobile communication terminal is equipped with asynchronous modem unit and synchronous modem unit, and in asynchronous and synchronous mobile communication system coexistence, and in the mobile communications network of the frontier district of the switching cell with preset size between asynchronous and synchronous mobile communication system is regional, this terminal can used the viability that is provided by asynchronous mobile communiation system, reception is from the signal of synchronous mobile communication system, this method comprises first step: when the described mobile communication terminal that the service that is provided by asynchronous mobile communiation system is provided passes handover cell area shift-in retaining zone, the asynchronous modem unit of described mobile communication terminal obtains the system information that the base station shifting from this handover cell area sends, drive the synchronous modem unit of described mobile communication terminal, and the request asynchronous mobile communiation system is carried out switching; Second step: described mobile communication terminal drives this synchronous modem unit and changes to idle condition; Third step: when when asynchronous mobile communiation system is received switching command, the asynchronous modem unit of described mobile communication terminal is to the synchronous modem unit channel assignment message; The 4th step: mobile communication terminal is closed asynchronous modem unit and is switched vocoder; And the 5th step: synchronous modem unit realize with synchronous mobile communication system synchronously.
In addition, the invention provides a kind of mobile communication system, comprising: the synchronous mobile communication network; Asynchronous mobile communication network, itself and this mutual crossover of synchronous mobile communication network; And switching cell, its boundary between synchronous mobile communication system and asynchronous mobile communiation system, and be equipped with base station shifting to be used to send the signal that the signal that uses with asynchronous mobile communiation system has same frequency, wherein this mobile communication system is worked as follows: when the multimode multi-mode mobile communication terminal with asynchronous modem unit and synchronous modem unit passes handover cell area shift-in synchronous mobile communication network area from the asynchronous mobile communication network zone, this mobile communication terminal receives the signal that sends from described base station shifting, switches thereby carry out.
Below, will be described in detail with reference to the attached drawings embodiments of the invention.In the following description, " mobile communication terminal " is meant and can be used in asynchronous and multimode multi-mode mobile communication terminal synchronous mobile communication system.These mobile communication terminals can be classified as: the viability that is provided by asynchronous mobile communiation system is being provided, can utilize the terminal of synchronous modem unit reception from the signal of synchronous mobile communication system, and the viability that provides by asynchronous mobile communiation system is being provided, can utilize synchronous modem unit to send signal and receive terminal from the signal of this synchronous mobile communication system to synchronous mobile communication system.The back will be to its detailed introduction.
Fig. 1 illustrates the configuration of having used mobile communications network of the present invention.
Multimode multi-mode mobile communication terminal 10 can be connected to asynchronous mobile communiation system 20 and synchronous mobile communication system 30 selectively with wireless mode, and uses the voice-and-data service.
Asynchronous mobile communiation system 20 comprises: by Node B/RNC 210 that Node B (Node B) and radio network controller (RNC) are formed, wherein Node B is the base station of communicating by letter with mobile communication terminal 10 in wireless zone, and RNC is used for Control Node B; Asynchronous mobile switching centre (MSC) 220, it is connected to Node B/RNC 210 and calls out exchange to carry out, thereby provides service to mobile communication terminal 10; SMS service center (SMSC) 240, it is connected to asynchronous MSC 220 by No. 7 public signaling networks 230; SCP (SCP) 250; Attaching position register (HLR) 260; GPRS serving GPRS support node (SGSN) 270, it is connected between Node B/RNC 210 and GPRS (GPRS) network 280, is used to keep the position tracking of mobile communication terminal 10 and carry out access control and safety function; And Gateway GPRS Support Node (GGSN) 290, it is connected to SGSN 270 by GPRS network 280, and is connected to public signaling network 230 No. 7, to support by internet 40 and with the external packet collaborative work.
In addition, synchronous mobile communication system 30 comprises: base-station transceiver system (BTS)/base station controller (BSC) 310, and this BTS/BSC 310 is by be used for supporting base-station transceiver system (BTS) of communicating by letter with mobile communication terminal 10 and the base station controller (BSC) that is used to control BTS to form in wireless zone; MSC 320, and it is connected to one or more BSC and calls out exchange to carry out; SMSC 340, and it is connected to MSC 320 by No. 7 public signaling networks 330; SCP 350; HLR 360; Packet data serving node (PDSN) 370, it is connected to BSC to provide packet data service to the user; And data core network (DCN) 380, be used to support the connection between PDSN 370 and the internet 40.
The MSC 220 of asynchronous mobile communiation system 20 and the MSC 320 of synchronous mobile communication system 30 are connected to each other by No. 7 public signaling networks 230 and 330, and send and receive mobile communication terminal 10 and switch required information.In addition, HLR 260 and 360 can realize with two stack HLR, store and managing user information, and user mode of supplemental services or the like, and provide user profile according to the request of MSC 220 and 320.
In this system environments, when the mobile communication terminal 10 of carrying out voice communication in the asynchronous mobile communiation system zone moved to the synchronous mobile communication system zone, mobile communication terminal 10 detected the asynchronous signal that sends from synchronous mobile communication system 30.If the asynchronous signal that sends from synchronous mobile communication system 30 increases to more than the preset gate limit value, this mobile communication terminal begins to communicate by letter with synchronous mobile communication system.In this case, utilization is positioned at the base station of the synchronous mobile communication system at place, asynchronous mobile communiation system zone boundary, perhaps utilize the base station shifting that makes up in the extra switching cell of realizing of boundary between asynchronous and synchronous mobile communication system is regional, can go out from the asynchronous signalling that synchronous mobile communication system 30 sends.
Fig. 2 illustrates the structure that is applied to mobile communication terminal of the present invention.
As shown in Figure 2, being applied to multimode multi-mode mobile communication terminal 10 of the present invention comprises: antenna 110, asynchronous mobile communiation service module 120, synchronous mobile communication service module 130 and utility module 140.The frequency band that antenna 110 can be handled synchronously simultaneously and asynchronous mobile communiation is served.
In addition, in multimode multi-mode mobile communication terminal 10, the software that is used for user interface, assistant service, mobile management, connection/session control, resource control and protocol processes has been installed, thereby allow the user to use various application services, carry out and switch, and according to the mobile communication system translation-protocol.
Above-mentioned mobile communication terminal can be classified as can be from the terminal of synchronous mobile communication system received signal at the viability that uses asynchronous mobile communiation system to provide, and can send signal and from the terminal of this synchronous mobile communication system received signal to this synchronous mobile communication system at the viability that uses asynchronous mobile communiation system to provide.If at the viability that uses asynchronous mobile communiation system to provide, this mobile communication terminal can send signal and from this synchronous mobile communication system received signal to synchronous mobile communication system, compare with mobile communication terminal that can only received signal so, as the configuration of the assembly of duplexer 121 and 131 some complexity that will become.Therefore, the influence of signal interference or the like must be taken into account the design of these assemblies.
In the present invention, to carry out the multimode multi-mode mobile communication terminal that switches in order controlling from the asynchronous mobile communiation system zone, will to send to the mobile communication terminal that moves to the synchronous mobile communication system zone with the signal that the signal that uses in the asynchronous area has a same frequency to the synchronous mobile communication system zone.In order to realize this operation, can adopt to make the synchronising base station be positioned at the asynchronous area boundary send the method that has the dummy pilot signal of same frequency with asynchronous signal, perhaps adopt borderline region place between asynchronous and retaining zone to make up the method for handover cell area in addition.
At first, with reference to figure 3～6, be described below by making the synchronising base station that is positioned at the asynchronous area boundary send the method that dummy pilot signal is controlled mobile communication terminal.
Fig. 3 is illustrated in the mobile communications network of asynchronous and synchronizing network coexistence and utilizes dummy pilot signal to control the method for mobile communication terminal.
In single mobile communication system, " switching " (or " transfer ") be meant when mobile communication terminal when a sub-district of mobile communication system moves to its another sub-district, the technology that allows the user under the situation of not interrupting, to communicate.
The present invention relates in the network of synchronous and asynchronous mobile communiation system coexistence, be used for the terminal control method of the switching of multimode multi-mode mobile communication terminal.Move to asynchronous area A at mobile communication terminal 10 from retaining zone B, and mobile communication terminal 10 moves to these two kinds of situations of retaining zone B a kind of situation after will describing in detail from asynchronous area A.
When the mobile communication terminal 10 of the service of using asynchronous area A during near retaining zone B, mobile communication terminal 10 receives the dummy pilot signal that sends from the base station of synchronous mobile communication system.Because the signal that uses in dummy pilot signal and the asynchronous mobile communiation system has same frequency, thereby the mobile communication terminal 10 with asynchronous modem unit of activation can detect at an easy rate from the signal of the base station transmission of synchronous mobile communication system.
Fig. 4 illustrates the change curve that move of dummy pilot signal intensity along with mobile communication terminal.
As can be seen, in the time of in mobile communication terminal moves to retaining zone, the intensity of the signal S1 that receives from asynchronous mobile communiation system weakens gradually, and the intensity of the dummy pilot signal S2 that receives from the base station of synchronous mobile communication system strengthens gradually.Like this, preset threshold T if the intensity of dummy pilot signal S2 increases to surpass gradually, mobile communication terminal is just opened synchronous modem unit so, so that communicate with synchronous mobile communication system.
After opening synchronous modem unit, the base station of mobile communication terminal search synchronous mobile communication system, and via the Search Results notice asynchronous mobile communiation system of asynchronous modem controller with search base station.Then, response is from the switching command of asynchronous mobile communiation system, carries out to be used for the program that is connected with synchronous mobile communication system.This program can be divided into two operations, thereby is described according to two types mobile communication terminal.That is to say, according to mobile communication terminal is to use the viability that is provided by asynchronous mobile communiation system can receive terminal from the signal of synchronous mobile communication system, still using the viability that provides by asynchronous mobile communiation system, can either send signal to synchronous mobile communication system and also can receive terminal from the signal of this synchronous mobile communication system, the mobile communication terminal that switches is carried out in control in a different manner.
Fig. 5 is the method flow diagram that is used to control mobile communication terminal according to a first embodiment of the invention, this flow chart shows at the viability that uses asynchronous mobile communiation system to provide can use the method for dummy pilot signal control mobile communication terminal under the situation of the mobile communication terminal of synchronous mobile communication system received signal.
In step S100, when using asynchronous mobile communiation system to provide the mobile communication terminal of service to move to retaining zone, the asynchronous modem unit of this mobile communication terminal receives the dummy pilot signal from synchronous mobile communication system.In this case, because the signal that uses in dummy pilot signal and the asynchronous mobile communiation system has same frequency, thereby the asynchronous modem unit of mobile communication terminal can easily detect this dummy pilot signal.
In step S102, the asynchronous modem unit of mobile communication terminal after receiving dummy pilot signal, sends message to synchronous modem unit and drives synchronous modem with request.Therefore, in step S104, synchronous modem unit is carried out the initialize routine of synchronous modem, and prepares the pilot channel of search synchronous mobile communication system.Synchronous modem unit is searched for the pilot channel of synchronous mobile communication system in step S106 after, with the result notification asynchronous modem unit of search for pilots channel, the result of this search for pilots channel just searches for the Search Results of the sub-district of the synchronous mobile communication system that will carry out switching therein to synchronous modem unit in step S108.
Therefore, in step S110, asynchronous modem unit sends to asynchronous mobile communiation system with the Cell searching result of synchronous mobile communication system.Asynchronous mobile communiation system, after receiving the Cell searching result, the result determines whether to switch based on this Cell searching, and the definite sub-district that will switch therein.Meanwhile, in step S112, the synchronizing channel of synchronous modem unit search synchronous mobile communication system, and in step S114, change over idle condition.
After this, in step S116, the asynchronous modem unit of asynchronous mobile communiation system order mobile communication terminal is carried out and is switched, and in step S118, asynchronous modem unit sends to synchronous modem unit with channel assignment message.In this case, channel assignment message comprises synchronous modem unit is changed to business (traffic) state parameters needed from idle condition.
In step S120, synchronous modem unit after receiving channel assignment message, is switched vocoder, is closed asynchronous modem unit, and change over service condition in step S122.Then, in step S124, synchronous modem unit sends reverse traffic signal, so as synchronous with synchronous mobile communication system, and the base station switching of notice synchronous mobile communication system is finished in step S126.
At the viability that uses asynchronous mobile communiation system to provide, the mobile communication terminal that is applied to present embodiment can only be from the synchronous mobile communication system received signal.Therefore, after asynchronous modem unit was closed, synchronous modem unit must send reverse traffic signal.
Fig. 6 is the method flow diagram that is used to control mobile communication terminal according to second embodiment of the invention, the viability that is provided by asynchronous mobile communiation system using is provided this flow chart, mobile communication terminal can send signal and under the situation of synchronous mobile communication system received signal, adopt the method for dummy pilot signal control mobile communication terminal to synchronous mobile communication system.
In this embodiment, from starting from making asynchronous modem unit receive dummy pilot signal, and drive the program of synchronous modem unit, to making asynchronous mobile communiation system send switching command to asynchronous modem unit, and make asynchronous modem unit to the program of synchronous modem unit channel assignment message, identical with the situation of the described mobile communication terminal control method of Fig. 5.
That is to say, in step 200, when the mobile communication terminal that the service that is provided by asynchronous mobile communiation system is provided moves to retaining zone, the asynchronous modem unit of mobile communication terminal receives the dummy pilot signal from synchronous mobile communication system, and the request synchronous modem unit drives synchronous modem in step S202.
Therefore, in step S204, synchronous modem unit is carried out the initialize routine of synchronous modem, and prepare the pilot channel of search synchronous mobile communication system, in step S206, search for the pilot channel of synchronous mobile communication system, in step S208, notify the Search Results of the sub-district of asynchronous modem unit about searching for the synchronous mobile communication system that to carry out switching therein.
Then, when asynchronous modem unit in step S210 sends to asynchronous mobile communiation system with the Search Results of the sub-district of synchronous mobile communication system, asynchronous mobile communiation system determines whether to switch based on this Cell searching result, and definite sub-district of switching therein.Meanwhile, synchronous modem unit is searched for the synchronizing channel of synchronous mobile communication system in step S212, and changes to idle condition in step S214.If asynchronous mobile communiation system order asynchronous modem unit carry out to be switched in step S216, so asynchronous modem unit in step S218 to the synchronous modem unit channel assignment message.
Then, synchronous modem unit changes to service condition in step S220, and sends reverse traffic signal so that synchronous with synchronous mobile communication system in step S222.Next, synchronous modem unit is notified the base station of synchronous mobile communication system to switch in step S224 and is finished, and switches vocoder and close asynchronous modem controller in step S226.
The viability that is provided by asynchronous mobile communiation system in use sends function from signal to synchronous mobile communication system is provided the mobile communication terminal that is applied to present embodiment.Therefore, mobile communication terminal must send reverse traffic signal to synchronous mobile communication system before closing asynchronous modem unit, thereby synchronous with synchronous mobile communication system.In addition, this mobile communication terminal with compare the service that improvement can be provided using the asynchronous mobile communiation viability can only receive from the mobile communication terminal of the signal of synchronous mobile communication system.That is to say, because can only be from this mobile communication terminal of synchronous mobile communication system received signal at use asynchronous mobile communiation viability, just carry out synchronously later on closing asynchronous modem unit with synchronous mobile communication system, thereby the time between the execution sync period be one section mute interval, make sound quality degenerate thus.On the contrary, because can send signal to synchronous mobile communication system at use asynchronous mobile communiation viability also can be from the mobile communication terminal of synchronous mobile communication system received signal, after carrying out synchronously, just close asynchronous modem controller, thereby seldom produce mute interval with synchronous mobile communication system.Next, with reference to figure 7～Fig. 9, the frontier district that is described between asynchronous and the retaining zone makes up switching cell, and the method for utilizing this switching cell control mobile communication terminal.
Embodiment must make up a handover cell area C in addition at place, the frontier district between asynchronous area A and the retaining zone B, and this switching cell comprises base station shifting 410 hereto.Base station shifting 410 sends signal to another mobile communication terminal that is positioned at this handover cell area, is used to show that this mobile communication terminal is currently located in everything changing district.This signal comprises system information, and sends with the frequency identical with the frequency of asynchronous mobile communiation system use.
This system information transmissions signal comprises the specific scramble codes that is used to distinguish the sub-district (asynchronous cell and synchronized cells) that differs from one another.Preferably, adopt 512 scramblers.In addition, the length of handover cell area, the distance between the just asynchronous and retaining zone border is preferably calculated and is made up according to following formula (1), has wherein considered the translational speed of mobile communication terminal:
S
HOCELL＝v
MS*T
HO (1)
In this case, S
HOCELLBe the size of sub-district, just, the distance between the asynchronous and retaining zone, V
MSBe the translational speed of mobile communication terminal, T
HOBe to switch the time that needs, T
HOCan be set to for example 10～20 seconds.
In this system environments, in the time of the 10 shift-in synchronous mobile communication system zones of the mobile communication terminal in the asynchronous mobile communiation system zone, mobile communication terminal 10 is received the signal that the base station shifting from handover cell area sends, and drives synchronous modem unit according to this signal.In addition, mobile communication terminal 10 request asynchronous mobile communiation systems are carried out and are switched, thereby are connected with synchronous mobile communication system.
In addition, this switching cell is only accepted and is carried out the relevant calling of mobile communication terminal of switching to synchronizing network from asynchronous network, to limiting towards the exhalation of asynchronous mobile communiation system with from the incoming call of asynchronous mobile communiation system, and accept the interior incoming call of switching cell from synchronous mobile communication system, and towards the exhalation of this synchronous mobile communication system, thereby prevent the voice quality decline.
Fig. 7 is illustrated in the method for utilizing switching cell control mobile communication terminal in the mobile communications network of asynchronous and synchronizing network coexistence.
When the mobile communication terminal 10 shift-in retaining zone B of the service of using asynchronous area A, mobile communication terminal 10 is received the signal that sends from handover cell area C.Base station BTS from handover cell area C
HO410 signals that send comprise and show the mobile communication terminal 10 current system informations that are sitting among the handover cell area C.After receiving this signal, mobile communication terminal request asynchronous mobile communiation system 20 is carried out and is switched, and drives synchronous modem unit simultaneously.The asynchronous mobile communiation system 20 of having received this handoff request must send switching command.
As mentioned above, asynchronous mobile communiation system 20 is unconditionally ordered switching in response to the request of mobile communication terminal 10, thereby prevents that the frontier district between asynchronous and synchronizing network from ping-pong phenomenon taking place.Table tennis refers to when the power level at place, the frontier district between the sub-district frequently changes, and carries out the phenomenon of switching repeatedly.
Fig. 8 is the method flow diagram that is used to control mobile communication terminal that illustrates according to third embodiment of the invention, the viability that provides by asynchronous mobile communiation system using is provided, mobile communication terminal can only utilize the method for switching cell control mobile communication terminal under the situation of synchronous mobile communication system received signal.
When the mobile communication terminal that the service that is provided by asynchronous mobile communiation system is provided passes handover cell area, when asynchronous area moves to retaining zone, the asynchronous modem unit of mobile communication terminal receives message from the base station of handover cell area in step S300, this message comprises and shows that mobile communication terminal is sitting at the system information of handover cell area at present.In this case, the signal that comprises this system information adopts the identical frequency of using with asynchronous mobile communiation system of frequency.
The base station from handover cell area receives that the asynchronous modem unit of the mobile communication terminal of system information sends the message that request drives synchronous modem to synchronous modem unit in step S302, and switches message to asynchronous mobile communiation system transmission request in step S304.The synchronous modem unit of mobile communication terminal is carried out the initialize routine of synchronous modem in step S306, prepare the pilot channel of search synchronous mobile communication system, and the pilot channel and the synchronizing channel of in step S308 and S310, searching for synchronous mobile communication system, and in step S312, change to idle condition.
Then, in step S314, asynchronous modem unit receives the switching command from asynchronous mobile communiation system, and in step S316 to the synchronous modem unit channel assignment message.In this case, channel assignment message comprises synchronous modem unit is changed to the service condition parameters needed from idle condition.After receiving channel assignment message, synchronous modem unit is closed asynchronous modem unit, and finishes the vocoder switching by closing asynchronous vocoder and driving synchronous vocoder in step S318.Synchronous modem unit changes to service condition in step S320.Then, synchronous modem unit sends reverse traffic signal in step S322, so as synchronous with synchronous mobile communication system, and the described switching in base station of notice synchronous mobile communication system is finished in step S324.
The mobile communication terminal that is applied to present embodiment is to use the viability that is provided by asynchronous mobile communiation system can only be from the terminal of synchronous mobile communication system received signal.Therefore, after asynchronous modem unit was closed, synchronous modem unit must send reverse traffic signal.
Fig. 9 shows the method that is used to control mobile communication terminal according to fourth embodiment of the invention, the viability that provides by asynchronous mobile communiation system using is provided, mobile communication terminal can send signal to synchronous mobile communication system, and can under the situation of synchronous mobile communication system received signal, utilize the method for switching cell control mobile communication terminal.
In this embodiment, allow the system information of asynchronous modem unit acquisition from the base station in the handover cell area, send synchronous modem unit and drive order, send switching command to asynchronous mobile communiation system, and when being driven, synchronous modem unit receives switching command from asynchronous mobile communiation system, and allow the process of asynchronous modem unit channel assignment message, same as shown in Figure 8.
That is to say, when the mobile communication terminal that the service that is provided by asynchronous mobile communiation system is provided passed handover cell area shift-in retaining zone, the asynchronous modem unit of mobile communication terminal base station from handover cell area in step S400 obtained system information.In step S402, asynchronous modem unit request synchronous modem unit drives synchronous modem, and the request asynchronous mobile communiation system is carried out switching in step S404.In this case, the signal that comprises system information uses the identical frequency of using with asynchronous mobile communiation system of frequency.
Thus, synchronous modem unit is carried out the initialize routine of synchronous modem in step S406, and prepare the pilot channel of search synchronous mobile communication system, the pilot channel and the synchronizing channel of search synchronous mobile communication system in step S408 and S410, and in step S412, change to idle condition.Then, if asynchronous mobile communiation system order asynchronous modem unit carry out to be switched in step S414, asynchronous modem unit just in step S416 to the synchronous modem unit channel assignment message.
Then, synchronous modem unit changes over service condition in step S418, sends reverse traffic signal in step S420, so that carry out synchronously with synchronous mobile communication system.Then, synchronous modem unit notifies the described switching in base station of synchronous mobile communication system to finish in step S422, in step S424, close asynchronous modem controller, and finish the vocoder switching by closing asynchronous vocoder and driving synchronous vocoder.
Has the viability that is provided by asynchronous mobile communiation system in use sends function from signal to synchronous mobile communication system owing to be applied to the mobile communication terminal of present embodiment, therefore mobile communication terminal is closed with the forward direction synchronous mobile communication system in asynchronous modem unit and is sent reverse traffic signal, thereby carries out synchronously with synchronous mobile communication system.This embodiment is with respect to using the asynchronous mobile communiation viability that the service of improvement can only can be provided for the mobile communication terminal of synchronous mobile communication system received signal.That is to say, owing to using the asynchronous mobile communiation viability to be merely able to from the mobile communication terminal of synchronous mobile communication system received signal, after closing asynchronous modem unit, just carry out synchronously with synchronous mobile communication system, thereby the time between the execution sync period be a mute interval, thereby make sound quality degenerate.On the contrary, owing to using the asynchronous mobile communiation viability to send signal and can be to synchronous mobile communication system from the mobile communication terminal of synchronous mobile communication system received signal, after carrying out synchronously with synchronous mobile communication system, just close asynchronous modem controller, thereby seldom produce mute interval.
As mentioned above, those skilled in the art can understand that the present invention can realize with other embodiment under the situation that does not change its technology purport or essential feature.Therefore, the foregoing description should be interpreted as it is for illustration purpose rather than restricted purpose and disclosed.Those skilled in the art can understand that scope of the present invention is to be limited by the following claim book, rather than limit by the foregoing description, and, all belong to scope of the present invention from the meaning of these claims and equivalent concepts thereof and various modifications, increase and the replacement of scope acquisition.
Industrial applicibility
As mentioned above, the present invention is conducive in movement asynchronous and the synchronous mobile communication system coexistence The residential quarter of search synchronous mobile communication system in the communication network, and utilize dummy pilot signal to activate Synchronous modem unit, thus can prevent communication disruption when switching, provide continuous Service, thus improve service quality.
In addition, the present invention can make up the handover cell area with preset size at asynchronous and place, retaining zone frontier district, and when mobile communication terminal enters handover cell area, carry out switching by utilizing the system information of receiving from the base station of handover cell area to activate synchronous modem unit, be enough to move to the time margin of retaining zone from asynchronous area thereby mobile communication terminal is had.
As mentioned above, mobile communication terminal is when asynchronous area moves to retaining zone, can carry out with the time enough surplus and switch, thereby can prevent that the phenomenon of closing asynchronous modem controller before driving synchronous modem from taking place, perhaps prevent to drive simultaneously synchronously and asynchronous modem controller and cause the unnecessarily phenomenon generation of battery power consumption.
Claims (15)
1. multimode multi-mode mobile communication terminal control method that is used to switch, described multimode multi-mode mobile communication terminal is equipped with asynchronous modem unit and synchronous modem unit, and in the mobile communications network of asynchronous and synchronous mobile communication system coexistence, described multimode multi-mode mobile communication terminal can use the viability that is provided by described asynchronous mobile communiation system, from described synchronous mobile communication system received signal, described method comprises:
First step, when the described mobile communication terminal shift-in retaining zone of the service that provides by described asynchronous mobile communiation system is provided, the described asynchronous modem unit of described mobile communication terminal receives dummy pilot signal from described synchronous mobile communication system, drive the described synchronous modem unit of described mobile communication terminal, search will be carried out the sub-district of switching therein, notify described asynchronous mobile communiation system about carrying out the Search Results of the sub-district of switching therein, and when when described asynchronous mobile communiation system is received switching command, to described synchronous modem unit channel assignment message;
Second step is switched vocoder and is closed described asynchronous modem unit; And
Third step, described synchronous modem unit realization is synchronous with described synchronous mobile communication system.
2. multimode multi-mode mobile communication terminal control method that is used to switch, described multimode multi-mode mobile communication terminal is equipped with asynchronous modem unit and synchronous modem unit, and in the mobile communications network of asynchronous and synchronous mobile communication system coexistence, described multimode multi-mode mobile communication terminal can use the viability that is provided by described asynchronous mobile communiation system, to described synchronous mobile communication system transmission signal and from described synchronous mobile communication system received signal, described multimode multi-mode mobile communication terminal can use the viability that is provided by described asynchronous mobile communiation system, to described synchronous mobile communication system transmission signal and from described synchronous mobile communication system received signal, described method comprises:
First step, when the described mobile communication terminal shift-in retaining zone of the service that provides by described asynchronous mobile communiation system is provided, the described asynchronous modem unit of described mobile communication terminal receives dummy pilot signal from described synchronous mobile communication system, drive the described synchronous modem unit of described mobile communication terminal, search will be carried out the sub-district of switching therein, notify described asynchronous mobile communiation system about carrying out the Search Results of the sub-district of switching therein, and when when described asynchronous mobile communiation system is received switching command, to described synchronous modem unit channel assignment message;
Second step, described synchronous modem unit realization is synchronous with described synchronous mobile communication system; And
Third step switches vocoder and closes described asynchronous modem unit.
3. mobile communication terminal control method as claimed in claim 1 or 2, the frequency that wherein said dummy pilot signal has is identical with the frequency of the signal that uses in described asynchronous mobile communiation system.
4. mobile communication terminal control method as claimed in claim 1 or 2, wherein said first step may further comprise the steps:
Described asynchronous modem unit receives described dummy pilot signal from the base station of described synchronous mobile communication system;
The described synchronous modem unit of described asynchronous modem unit request drives synchronous modem;
Described synchronous modem unit is carried out the initialize routine of described synchronous modem, and searches for the pilot channel of described synchronous mobile communication system;
Described synchronous modem unit is notified the Search Results of described asynchronous modem unit about pilot channel, and described Search Results is the described Search Results of the described sub-district of the described synchronous mobile communication system of search;
Described asynchronous modem unit sends the described Search Results of the described sub-district of described synchronous mobile communication system to described asynchronous mobile communiation system;
Described synchronous modem unit is searched for the synchronizing channel of described synchronous mobile communication system, and changes to idle condition; And
When the described asynchronous modem unit of described asynchronous mobile communiation system order was carried out switching, described asynchronous modem unit sent described channel assignment message to described synchronous modem unit.
5. mobile communication terminal control method as claimed in claim 1 or 2, wherein realize may further comprise the steps synchronously with described synchronous mobile communication system:
Described synchronous modem unit changes to service condition;
Described synchronous modem unit sends reverse traffic signal to the described base station of described synchronous mobile communication system; And
Described synchronous modem unit is notified described synchronous mobile communication system to switch and is finished.
6. multimode multi-mode mobile communication terminal control method that is used to switch, described multimode multi-mode mobile communication terminal is equipped with asynchronous modem unit and synchronous modem unit, and in the mobile communications network of the coexistence of asynchronous and synchronous mobile communication system and switching cell with preset size frontier district between asynchronous and synchronous mobile communication system is regional, described multimode multi-mode mobile communication terminal can use the viability that is provided by described asynchronous mobile communiation system, from described synchronous mobile communication system received signal, described method comprises:
First step, when the described mobile communication terminal that the service that is provided by described asynchronous mobile communiation system is provided passes the described retaining zone of described handover cell area shift-in, the described asynchronous modem unit of described mobile communication terminal obtains the system information that the base station shifting from described handover cell area sends, drive the described synchronous modem unit of described mobile communication terminal, and ask described asynchronous mobile communiation system to carry out switching;
Second step, described mobile communication terminal drive described synchronous modem unit and change to idle condition;
Third step, when when described asynchronous mobile communiation system is received switching command, the asynchronous modem unit of described mobile communication terminal is to described synchronous modem unit channel assignment message;
The 4th step, described mobile communication terminal is closed described asynchronous modem unit, and switches vocoder; And
The 5th step, described synchronous modem unit realization is synchronous with described synchronous mobile communication system.
7. multimode multi-mode mobile communication terminal control method that is used to switch, described multimode multi-mode mobile communication terminal is equipped with asynchronous modem unit and synchronous modem unit, and in asynchronous and synchronous mobile communication system coexistence, and in the mobile communications network of the frontier district of the switching cell with preset size between asynchronous and synchronous mobile communication system is regional, described multimode multi-mode mobile communication terminal can use the viability that is provided by described asynchronous mobile communiation system, from described synchronous mobile communication system received signal, described multimode multi-mode mobile communication terminal can use the viability that is provided by described asynchronous mobile communiation system, send signal to described synchronous mobile communication system, and from described synchronous mobile communication system received signal, described method comprises:
First step, when the described mobile communication terminal that the service that is provided by described asynchronous mobile communiation system is provided passes the described retaining zone of described handover cell area shift-in, the described asynchronous modem unit of described mobile communication terminal obtains the system information that the base station shifting from described handover cell area sends, drive the described synchronous modem unit of described mobile communication terminal, and ask described asynchronous mobile communiation system to carry out switching;
Second step, described mobile communication terminal drive described synchronous modem unit and change to idle condition;
Third step, when when described asynchronous mobile communiation system is received switching command, the asynchronous modem unit of described mobile communication terminal is to described synchronous modem unit channel assignment message;
The 4th step, described synchronous modem unit realization is synchronous with described synchronous mobile communication system; And
The 5th step, described mobile communication terminal is closed described asynchronous modem unit, and switches vocoder.
8. as claim 6 or 7 described mobile communication terminal control methods, wherein the frequency that has of the described system information that is obtained from described base station shifting by described mobile communication terminal is identical with the frequency of using described asynchronous mobile communiation system.
9. mobile communication terminal control method as claimed in claim 8, the signal that wherein comprises the described system information that sends from described base station shifting comprises the scrambler that shows about the information of sub-district, described mobile communication terminal place.
10. as claim 6 or 7 described mobile communication terminal control methods, wherein said second step may further comprise the steps:
Described synchronous modem unit is carried out the initialize routine of described synchronous modem, and prepares the pilot channel of the described synchronous mobile communication system of search;
Described synchronous modem unit is searched for the described pilot channel and the synchronizing channel of described synchronous mobile communication system; And
Described synchronous modem unit changes to idle condition.
11., wherein realize may further comprise the steps synchronously with described synchronous mobile communication system as claim 6 or 7 described mobile communication terminal control methods:
Described synchronous modem unit changes to service condition;
Described synchronous modem unit sends reverse traffic signal to the described base station of described synchronous mobile communication system; And
Described synchronous modem unit is notified described synchronous mobile communication system to switch and is finished.
12. as claim 6 or 7 described mobile communication terminal control methods, the size of wherein said switching cell is S
HOCELL=V
MS* T
HO, S wherein
HOCELLBe the size of described switching cell, V
MSBe the translational speed of described mobile communication terminal, T
HOIt is the needed time of described switching.
13. a mobile communication system comprises:
The synchronous mobile communication network;
Asynchronous mobile communication network with described synchronous mobile communication network crossover; And
Switching cell, its boundary between synchronous mobile communication system and asynchronous mobile communiation system, and base station shifting is equipped with, this base station shifting is used for sending the signal with frequency identical with the frequency of using at described asynchronous mobile communiation system,
Wherein said mobile communication system is worked in the following manner, promptly, when the multimode multi-mode mobile communication terminal with asynchronous modem unit and synchronous modem unit passes described handover cell area from the asynchronous mobile communication network zone, then during shift-in synchronous mobile communication network area, described mobile communication terminal receives the signal that sends from described base station shifting, switches thereby carry out.
14. mobile communication system as claimed in claim 13, wherein the described signal that sends from described base station shifting comprises the scrambler that is used to show about the information of sub-district, described mobile communication terminal place.
15. mobile communication system as claimed in claim 13, the size of wherein said switching cell are S
HOCELL=V
MS* T
HO, S wherein
HOCELLBe the size of described switching cell, V
MSBe the translational speed of described mobile communication terminal, T
HOIt is the needed time of described switching.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2004-0000715 | 2004-01-06 | ||
| KR1020040000715 | 2004-01-06 | ||
| KR1020040000715A KR100718008B1 (en) | 2004-01-06 | 2004-01-06 | Method for controlling Multi-mode Multi-band Mobile Communication Terminal for Hand-over Between Asynchronous Communication Network and Synchronous Communication Network |
| KR1020040005145 | 2004-01-27 | ||
| KR1020040005145A KR100746047B1 (en) | 2004-01-27 | 2004-01-27 | System for Hand-over Between Asynchronous Communication Network and Synchronous Communication Network and Hand-over Method Thereof |
| KR10-2004-0005145 | 2004-01-27 | ||
| PCT/KR2005/000029 WO2005067177A1 (en) | 2004-01-06 | 2005-01-06 | Method for controlling multi-mode multi-band mobile communication terminal for hand-over between asynchronous communication network and synchronous communication network and mobile communication system therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1910834A true CN1910834A (en) | 2007-02-07 |
| CN1910834B CN1910834B (en) | 2010-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2005800020131A Expired - Fee Related CN1910834B (en) | 2004-01-06 | 2005-01-06 | Method for controlling multi-mode multi-band mobile communication terminal for hand-over between asynchronous communication network and synchronous communication network and mobile communication syste |
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| Country | Link |
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| KR (1) | KR100718008B1 (en) |
| CN (1) | CN1910834B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102143555A (en) * | 2010-12-09 | 2011-08-03 | 华为技术有限公司 | Terminal cell search method and relevant equipment and system |
| US9288745B2 (en) | 2010-12-09 | 2016-03-15 | Huawei Technologies Co., Ltd. | Cell search method of terminal and related device and system |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080219212A1 (en) * | 2004-06-08 | 2008-09-11 | Kim Young-Lak | Handover Method for Mixed Mobile Communication System of Asynchronous Network and Synchronous Network |
| KR100713492B1 (en) * | 2005-12-26 | 2007-04-30 | 삼성전자주식회사 | Method of acquiring effective handover network in multi-mode terminal and the terminal therefor |
| KR100739183B1 (en) * | 2005-12-30 | 2007-07-13 | 엘지전자 주식회사 | Mobile communications terminal and method for reducing power consumption of a first communications module according to the activation of a second communications module |
| KR101712910B1 (en) * | 2009-11-22 | 2017-03-07 | 엘지전자 주식회사 | Method for performing cell reselection procedure in multi mode device and apparatus therefor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100244193B1 (en) * | 1997-06-30 | 2000-02-01 | 윤종용 | The method of hard handoff using dummy pilot |
| KR100358351B1 (en) * | 1999-12-14 | 2002-10-25 | 한국전자통신연구원 | Hard Handoff Method between Asynchronous CDMA System and Synchronous CDMA System |
| KR100602023B1 (en) * | 2000-01-22 | 2006-07-20 | 유티스타콤코리아 유한회사 | Method for transmitting long code state information in asynchronous mobile communication system |
| KR100354168B1 (en) * | 2000-10-31 | 2002-09-27 | 엘지전자 주식회사 | Method and system for handoff communication mobile CDMA |
| KR100376580B1 (en) * | 2000-11-14 | 2003-03-17 | 에스케이 텔레콤주식회사 | A hand-off method between synchronous system and asynchronous system |
| KR100392643B1 (en) * | 2000-12-07 | 2003-07-23 | 에스케이 텔레콤주식회사 | A method of supporting a hand-off decision for mobility service of dual mode terminal |
-
2004
- 2004-01-06 KR KR1020040000715A patent/KR100718008B1/en not_active IP Right Cessation
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2005
- 2005-01-06 CN CN2005800020131A patent/CN1910834B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102143555A (en) * | 2010-12-09 | 2011-08-03 | 华为技术有限公司 | Terminal cell search method and relevant equipment and system |
| CN102143555B (en) * | 2010-12-09 | 2014-04-16 | 华为技术有限公司 | Terminal cell search method and relevant equipment and system |
| US9288745B2 (en) | 2010-12-09 | 2016-03-15 | Huawei Technologies Co., Ltd. | Cell search method of terminal and related device and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1910834B (en) | 2010-10-06 |
| KR20050072324A (en) | 2005-07-11 |
| KR100718008B1 (en) | 2007-05-14 |
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