CN1981458A

CN1981458A - Multi-mode multi-band mobile communication terminal and mode switching method thereof

Info

Publication number: CN1981458A
Application number: CNA2005800143112A
Authority: CN
Inventors: 金南健; 金泳洛; 金显郁; 韩苍汶
Original assignee: SK Telecom Co Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2004-03-04
Filing date: 2005-03-04
Publication date: 2007-06-13
Anticipated expiration: 2025-03-04
Also published as: KR20050089346A; CN1981458B; KR101041336B1

Abstract

Disclosed is a multi-mode multi-band mobile communication terminal and a mode switching method thereof wherein a mode switching can be performed between an asynchronous network and a synchronous network by minimizing interruption in communication. According to the switching method of a multi-mode multi-band mobile communication terminal, the power of a signal received from an asynchronous network or a synchronous network is measured and the measured power of the received signal drives a modem portion, thereby switching the mode of the mobile communication terminal.

Description

Multi-mode multi-band mobile communication terminal and mode switching method thereof

Technical field

The present invention relates to the multi-mode multi-band mobile communication terminal not only supporting asynchronous communication networks but also support synchronous communication network, more specifically, relate to a kind of multi-mode multi-band mobile communication terminal and mode switching method thereof, it can make the minimized while of communication interruption carry out mode switch between asynchronous mobile communication network and synchronous mobile communication network.

Background technology

Serve from the first generation (1G) mobile communication, the mobile communication service is always in continuous development, the service of first generation mobile communication is mainly used in the low quality voice communication, is provided as the analogue cellular advanced mobile phone system (hereinafter referred to as " AMPS ") that begins to provide service in the later stage eighties 20th century.The service of the second generation (2G) mobile communication makes it possible to provide improved voice communication and low speed (14.4Kbps) data, services by adopting digital cellular global mobile system (GSM) scheme, code division multiple access (CDMA) scheme, time division multiple access (TDMA) scheme etc.In (2.5G) the mobile communication service of the 2.5th generation, guaranteed the frequency of GHz frequency band, and developed the general personal communication service (PCS) in the whole world, thereby the service of 2.5G mobile communication has realized the data communication services of improved voice communications services and improvement speed (144Kbps) (itself is still very low).

Until the 2.5th generation, each mobile communications network that is used for the mobile communication service all comprises various communication equipments, for example user terminal, base station transmitter, base station controller, mobile switching centre, attaching position register (HLR) and VLR Visitor Location Register (VLR).

The service of the third generation (3G) mobile communication is by comprising that wideband CDMA (WCDMA) system provides with two kinds of the CDMA-2000 system different systems.The WCDMA system is the asynchronous mobile communiation system that is mainly proposed by third generation partner program (3GPP), and the CDMA-2000 system is the synchronous mobile communication system that is mainly proposed by 3GPP2.Particularly for the WCDMA system, global many service provider or are just being prepared to provide service by the wireless protocols that adopts International Mobile Telecommunication 2000 (IMT-2000) to be recommended.

The WCDMA system has realized high communication quality and has adopted the spread-spectrum scheme, so it is suitable for transmitting lot of data.The WCDMA communication system uses transmission rate to carry out speech coding as adaptive multi-rate (AMR) coding decoder of 12.2Kbps～4.75Kbps, and the high mobility of supporting even being enough to allow communicate with the user that the speed of 100Km per hour moves.Many countries are adopting the WCDMA communication plan now, and the 3GPP that is made of the many national structures that comprise the U.S., Europe, Korea S, Japan, China etc. is continually developing the technical specification that is used for WCDMA communication at present.

Recently, because the advantage of above-mentioned asynchronous WCDMA system adopts the country (for example U.S., Korea S and China) of synchronization CDMA-2000 network to begin to construct the WCDMA network so that WCDMA to be provided service basically.

Therefore, need a kind of mobile communication terminal that can not only support synchronous communication network but also support asynchronous communication networks, multi-mode multi-band (MMMB) mobile communication terminal looks and meets this demand.

Multi-mode comprises synchronous mode and asynchronous mode, multiband comprises the frequency band of about 2GHz of frequency band, the service of 3G mobile communication of the 800MHz of frequency band, the service of 2.5G mobile communication of the 800MHz of 2G mobile communication service or 1.8GHz, and the frequency band of the 4G mobile communication that will provide in the future service.

When the overlapping region of MMMB mobile communication terminal between synchronous communication network zone and asynchronous communication networks zone moves to the synchronous communication network zone, need between asynchronous mode and synchronous mode, carry out mode switch.According to the conventional method of mode switch, mobile communication terminal leave the overlapping region fully and be connected with the logical calling of asynchronous communication networks interrupt after, be used in and call out the modulator-demodulator that is connected with synchronous communication network and start working.Therefore, the interrupt interval about at least 20 seconds according to the mode switch needs of conventional method, communicating by letter during this interrupt interval is interrupted.

Summary of the invention

Therefore, the present invention is proposed in view of the above problems, and an object of the present invention is to provide a kind of multi-mode multi-band mobile communication terminal and mode switching method thereof, it can make the minimized while of communication interruption carry out mode switch between asynchronous mobile communication network and synchronous mobile communication network.

Another object of the present invention provides a kind of multi-mode multi-band mobile communication terminal and mode switching method thereof, and it can minimize ping-pong phenomenon when mobile communication terminal carries out mode switch between WCDMA pattern and CDMA pattern.

According to an aspect of the present invention, providing a kind of is used for making under idle condition multi-mode multi-band mobile communication terminal to carry out the method for mode switch between asynchronous mode and synchronous mode, described multi-mode multi-band mobile communication terminal comprises the synchronous modem that is used for the asynchronous modem controller that communicates with asynchronous mobile communication network and is used for communicating with the synchronous mobile communication network, said method comprising the steps of: (1) measures the power from the received signal of described asynchronous mobile communication network; (2) whether the value that records power of determining described received signal is lower than predetermined threshold value; (3) determine whether that interim has kept the value that records power of wherein said received signal to be lower than the state of predetermined threshold value at the fixed time; (4) when interim has kept described state at the fixed time, described synchronous modem is started working; And (5) be converted to synchronous mode with current communication pattern, enters the synchronous mode idle condition then.

According to a further aspect in the invention, providing a kind of is used for making under communications status multi-mode multi-band mobile communication terminal to carry out the method for mode switch between asynchronous mode and synchronous mode, described multi-mode multi-band mobile communication terminal comprises the synchronous modem that is used for the asynchronous modem controller that communicates with asynchronous mobile communication network and is used for communicating with the synchronous mobile communication network, said method comprising the steps of: (1) measures the power from the received signal of described asynchronous mobile communication network; (2) whether the value that records power of determining described received signal is lower than predetermined threshold value; (3) determine whether that interim has kept the value that records power of wherein said received signal to be lower than the state of predetermined threshold value at the fixed time; (4) when interim has kept described state at the fixed time, described synchronous modem is started working; (5) determine whether the communications status that asynchronous mode is called out finishes; (6) when the communications status of determining described asynchronous mode calling does not finish, determine whether be released with the Radio Link of described asynchronous mobile communication network; And (7) are when determining Radio Link with described asynchronous mobile communication network and be released, current communication pattern is converted to synchronous mode, and the synchronous mode calling of being undertaken by described synchronous mobile communication network is handled by described synchronous modem.

According to a further aspect in the invention, a kind of method that makes multi-mode multi-band mobile communication terminal carry out mode switch between asynchronous mode and synchronous mode is provided, described mobile communication terminal comprises the synchronous modem that is used for the asynchronous modem controller that communicates with asynchronous mobile communication network and is used for communicating with the synchronous mobile communication network, and said method comprising the steps of: monitor the system information from described asynchronous mobile communication network (1); (2) preset parameter value in the system information of being monitored is checked to determine whether to carry out mode switch; (3) when determining described preset parameter value requirement mode switch, make described synchronous modem carry out work; And (4) make described synchronous modem switch to described synchronous mode after carrying out work.

According to a further aspect in the invention, a kind of method that makes multi-mode multi-band mobile communication terminal carry out mode switch between asynchronous mode and synchronous mode is provided, described mobile communication terminal comprises the synchronous modem that is used for the asynchronous modem controller that communicates with asynchronous mobile communication network and is used for communicating with the synchronous mobile communication network, said method comprising the steps of: (1) search is from message commonly used (overhead message) information of described synchronous mobile communication network; (2) determine whether described message information commonly used comprises the preset mode handoff parameter that is used to carry out mode switch; (3) when determining described message information commonly used and comprise the preset mode handoff parameter, make described asynchronous modem controller carry out work; (4) make after described asynchronous modem controller carries out work, the communication pattern of described mobile communication terminal is being switched to described asynchronous mode.

According to a further aspect in the invention, provide a kind of multi-mode multi-band mobile communication terminal, this mobile communication terminal comprises: be used for the asynchronous modem controller that communicates with asynchronous mobile communication network; Be used for the synchronous modem that communicates with the synchronous mobile communication network; And mode switching controller, this mode switching controller is used to manage the current state of described asynchronous modem controller and described synchronous modem, and according to the corresponding communication pattern of mobile communications network under current with described mobile communication terminal, that controls described asynchronous modem controller and described synchronous modem enables (activation) and stop using (deactivation), wherein: when determining to carry out mode switch, described mode switching controller is used in the respective modem that is connected with the target mobile communications network and carries out work, thereby this respective modem is obtained go forward side by side line position registration of Network Synchronization; And after having carried out described location registers, described mode switching controller communicates by described respective modem and described target mobile communications network, and another modulator-demodulator inactive and that another mobile communications network communicates.

According to a further aspect in the invention, a kind of method that makes multi-mode multi-band mobile communication terminal carry out mode switch between asynchronous mode and synchronous mode is provided, described mobile communication terminal comprises and is used for a plurality of modulator-demodulators of communicating with asynchronous mobile communication network and synchronous mobile communication network, said method comprising the steps of: (1) is used in the respective modem that is connected with target mobile communications network as the mode switch target and carries out work when determining to carry out mode switch; (2) obtain Network Synchronization with described target mobile communications network by described respective modem; (3) carry out the location registers of carrying out to described target mobile communications network; And (4) communicate by described respective modem and described target mobile communications network, and stop using and another modulator-demodulator that another mobile communications network communicates.

According to a further aspect in the invention, a kind of method that makes multi-mode multi-band mobile communication terminal carry out mode switch between asynchronous mode and synchronous mode is provided, described mobile communication terminal comprises the synchronous modem that is used for the asynchronous modem controller that communicates with asynchronous mobile communication network and is used for communicating with the synchronous mobile communication network, said method comprising the steps of: (1) when described mobile communication terminal in the overlapping region between described asynchronous mobile communication network and described synchronous mobile communication network when described synchronous mobile communication network receives system message, the present mode of described mobile communication terminal is switched to asynchronous mode and searches for asynchronous signal, and described system message is represented the mode switch from described synchronous mobile communication network to described asynchronous mobile communication network; (2) determine whether to have detected asynchronous signal and whether carried out location registers; And (3) when not detecting asynchronous signal or also not carrying out described location registers, and the present mode of described mobile communication terminal is switched to synchronous mode, waits for during the counting interval and searching times is counted, and feeds back to step (1) then.

According to a further aspect in the invention, a kind of method that makes multi-mode multi-band mobile communication terminal carry out mode switch between asynchronous mode and synchronous mode is provided, described mobile communication terminal comprises the synchronous modem that is used for the asynchronous modem controller that communicates with asynchronous mobile communication network and is used for communicating with the synchronous mobile communication network, said method comprising the steps of: (1) searches for asynchronous signal by described mobile communication terminal under asynchronous mode, and when detecting asynchronous signal, send the request of registering the position of described mobile communication terminal to corresponding asynchronous communication networks; And (2) when the described request of registration location is rejected, and the current communication pattern of described mobile communication terminal is switched to synchronous mode, detects synchronizing signal, and registers the position of described mobile communication terminal to described synchronous communication network.

From aforementioned content as can be seen, the invention provides a kind of multi-mode multi-band mobile communication terminal and mode switching method thereof, it can minimize communication interruption when the asynchronous mobile communication network zone moves to the synchronous mobile communication network area at described mobile communication terminal.

And, the invention provides a kind of multi-mode multi-band mobile communication terminal and mode switching method thereof, it can minimize ping-pong phenomenon when described mobile communication terminal carries out mode switch automatically between WCDMA pattern and CDMA pattern.

Description of drawings

According to the detailed description below in conjunction with accompanying drawing, aforementioned and other purposes of the present invention, feature and advantage will be more clear, in the accompanying drawing:

Fig. 1 is the block diagram of the communication network that connected of illustration MMMB mobile communication terminal according to the present invention;

Fig. 2 is the block diagram of illustration according to the structure of MMMB mobile communication terminal of the present invention;

Fig. 3 is the block diagram of structure of the shared module of detailed illustration MMMB mobile communication terminal;

Fig. 4 is used for the figure of illustration according to the notion of the mode switch of MMMB mobile communication terminal of the present invention;

Fig. 5 is used for being illustrated in according to the mode switching method of the first embodiment of the invention curve chart based on the mode switch of signal strength signal intensity;

Fig. 6 is the flow chart according to the mode switching method of first embodiment of the invention;

Fig. 7 is the flow chart according to the mode switching method of second embodiment of the invention;

Fig. 8 is the flow chart according to the mode switching method of third embodiment of the invention;

Fig. 9 is the flow chart according to the mode switching method of fourth embodiment of the invention;

Figure 10 is the flow chart according to the mode switching method of fifth embodiment of the invention;

Figure 11 is the flow chart according to the mode switching method of sixth embodiment of the invention;

Figure 12 is used for the figure of illustration according to the notion of the mode switch of seventh embodiment of the invention; And

Figure 13 is the flow chart according to the mode switching method of seventh embodiment of the invention.

Embodiment

Describe in detail according to mobile communication terminal of the present invention with reference to Fig. 1 to 3 below.

At first, Fig. 1 is the block diagram of the communication network that connected of illustration MMMB mobile communication terminal according to the present invention.

With reference to Fig. 1, WCDMA network 100 (asynchronous communication networks) comprising: air station 101 is used for carrying out radio communication with mobile communication terminal 400; Radio network controller (hereinafter referred to as " RNC ") 102 is used to control air station 101; Serving GPRS Support Node (hereinafter referred to as " SGSN ") 103, it is connected to the mobility of RNC 102 with control mobile communication terminal 400; And Gateway GPRS Support Node (hereinafter referred to as " GGSN ") 106, being used for the asynchronous communication networks data, services, it is the trunking that is used for being undertaken by GPRS network 105 packet service control and packet data transmission.

RNC 102 is connected to the mobile switching centre (hereinafter referred to as " MSC ") 104 that is used to call out switching, and this MSC 104 is connected to the No.7 signaling network 107 that is used for the signaling exchange.This No.7 signaling network 107 be connected to the SMS service center (hereinafter referred to as " SMSC ") 108 that is used to provide Short Message Service and be used for the positional information of leading subscriber attaching position register (hereinafter referred to as " HLR ") 109 both.

Simultaneously, CDMA2000 network 200 (synchronous communication network) comprising: base transceiver station (hereinafter referred to as " BTS ") 201 is used for carrying out radio communication with mobile communication terminal 400; Base station controller (hereinafter referred to as " BSC ") 202 is used to control BTS 201; Packet data serving node (hereinafter referred to as " PDSN ") 204, it is connected to BSC 202 so that grouped data to be provided; Data core network (hereinafter referred to as " DCN ") 208, it is connected to PDSN 204 so that the Internet connection service to be provided; And MSC 203, it is connected to BSC 202 to carry out the signaling exchange.

MSC 203 is connected to the No.7 signaling network 205 that is used for the signaling exchange.No.7 signaling network 205 be connected to the SMSC 206 that is used to provide Short Message Service and the HLR of the positional information that is used for leading subscriber 207 both.

In the present embodiment, each in synchronous communication network 200 and the asynchronous communication networks 100 all comprises the independently HLR 109 or 207 that is used for managing user information and positional information.Yet synchronous communication network 200 and asynchronous communication networks 100 can come sharing users information and positional information by only use a HLR (two stack attaching position register) in two kinds of networks.

Fig. 2 is the block diagram of illustration according to the structure of MMMB mobile communication terminal of the present invention.

With reference to Fig. 2, has the protocol stack of synchronous mobile communication and asynchronous mobile communiation according to the MMMB mobile communication terminal 400 of support synchronous mobile communication of the present invention and asynchronous mobile communiation.

In brief, MMMB mobile communication terminal 400 according to the present invention comprises: antenna 410, be used for to/from synchronous communication network 200 and asynchronous communication networks 100 emission/reception radio waves; The synchronous radio device 430 that is used for synchronous communication; The asynchronous wireless device 420 that is used for asynchronous communication; And be used to synchronous communication and asynchronous communication that the shared module 440 of common source is provided.

Synchronous radio device 430 comprises the synchronous radio reflector 432 that is used for wireless transmission, the synchronous radio receiver 433 that is used for wireless receiving and synchronous modem 434.One side of each in synchronous radio reflector 432 and the synchronous radio receiver 433 is all passed through duplexer (duplexer) 431 and is connected to antenna 410, and their opposite side is connected to synchronous modem 434.

Asynchronous wireless device 420 also comprises the asynchronous wireless reflector 422 that is used for wireless transmission, the asynchronous wireless receiver 423 that is used for wireless receiving and asynchronous modem controller 424.One side of each in asynchronous wireless reflector 422 and the asynchronous wireless receiver 423 all is connected to antenna 410 by duplexer 421, and their opposite side is connected to asynchronous modem controller 424.

Fig. 3 is the block diagram of structure of the shared module of detailed illustration MMMB mobile communication terminal.

With reference to Fig. 3, shared module 440 according to MMMB mobile communication terminal of the present invention comprises: a plurality of two-port RAMs (hereinafter referred to as " DPRAM ") 441 and 442, and they are connected respectively to the modulator-demodulator 424 of asynchronous wireless device 420 and the modulator-demodulator 434 of synchronous radio device 430; And the primary processor 443 that is connected to DPRAM 441 and 442, it is to the synchronous of mobile communication terminal 400 and asynchronous communication is totally controlled and executive utility.Primary processor 443 is connected to and is used to store memory of data 444, is used for the I/O equipment 445 that is connected with ancillary equipment, and the electric power control module (hereinafter referred to as " PWM ") 446 that is used for electric power control.

In addition, shared module 440 comprises mode switching controller (call manager that is used to roam) 447, and it is used to make the call interruption that causes owing to the time delay during the mode switch to minimize.Mode switching controller 447 is connected to synchronous modem 434 and asynchronous modem controller 424 is controlled to carry out mode switch.Though present embodiment has adopted independently mode switching controller 447, mode switching controller can be embedded in synchronous modem 434 and the asynchronous modem controller 424.

Therefore, the mobile communication terminal with above-mentioned structure can communicate in asynchronous network and synchronizing network.And, mobile communication terminal 400 with above-mentioned structure can have four kinds of patterns can being selected by the user, and these four kinds of patterns comprise special-purpose asynchronous mode (only WCDMA), preferred asynchronous mode (preferred WCDMA), preferred synchronous mode (preferred CDMA) and special-purpose synchronous mode (only CDMA).In special-purpose asynchronous mode, mobile communication terminal 400 only communicates by asynchronous communication networks.In preferred asynchronous mode, mobile communication terminal 400 communicates by asynchronous communication networks basically, and carries out mode switch so that can communicate by synchronous communication network when it leaves the asynchronous communication networks zone.In preferred synchronous mode, mobile communication terminal 400 communicates by synchronous communication network basically, and carries out mode switch so that can communicate by asynchronous communication networks when it enters the asynchronous communication networks zone.In special-purpose synchronous mode, mobile communication terminal 400 only communicates by synchronous communication network.

With reference to Fig. 4 to 6 mode switching method according to the MMMB mobile communication terminal of first embodiment of the invention is described below.According to the first embodiment of the present invention, the MMMB mobile communication terminal is converted to synchronous mode according to the intensity of the signal that receives from asynchronous communication networks from asynchronous mode.

Fig. 4 is used for the figure of illustration according to the notion of the mode switch of MMMB mobile communication terminal of the present invention.

When mobile communication terminal 400 when the regional A of asynchronous communication networks moves to borderline region B between asynchronous communication networks and the synchronous communication network, mobile communication terminal 400 receives the signal that intensity reduces from asynchronous network air station 101.Here, mobile communication terminal 400 determines whether to carry out mode switch according to the intensity that records from the signal of asynchronous network between asynchronous mode and synchronous mode.

Can (be expressed as Ec/Io according to the ratio of the signal strength signal intensity of pilot channel and the size of all noises that receive from the intensity of the signal of asynchronous network; The interference of the energy of carrier wave/other signals), reception (Rx) power, the received signal code power (RSCP) that is represented as RSSI (received signal intensity index) waits and obtains.

In the middle of these parameters, Ec/Io is acute variation with radio environment on every side.By contrast, RSSI and RSCP have the threshold value of constant, because RSSI is the received power of mobile communication terminal, RSCP is the value of decoding and obtaining by to the signal that is received by mobile communication terminal.

Therefore, the present invention adopts RSSI or RSCP rather than Ec/Io when measure signal intensity.To describe the method for using RSCP below, same method also is applicable to RSSI.

Fig. 5 is used for being illustrated in the curve chart that carries out mode switch according to the mode switching method of first embodiment of the invention according to signal strength signal intensity.Here, will signal strength signal intensity be described based on RSCP.

As shown in Figure 5, when signal strength signal intensity is reduced to predetermined threshold value TH when following, mobile communication terminal 400 recognizes that it just leaves from the zone of asynchronous communication networks at present, and determines whether at the fixed time this state continues in the interval T.When this state continued in the interval T at the fixed time, mobile communication terminal 400 prepared to carry out mode switch from the asynchronous mode to the synchronous mode by making synchronous modem carry out work.Carry out at synchronous modem under the state of work, when the signal from the air station of asynchronous communication networks was released, mobile communication terminal 400 was defined as its zone C of leaving and entering synchronous communication network from the regional A of asynchronous communication networks.Then, mobile communication terminal 400 is connected with synchronous communication network by synchronous modem immediately, thereby finishes mode switch.

Fig. 6 is the flow chart according to the mode switching method of first embodiment of the invention.Mode switching method according to first embodiment of the invention is the method for carrying out when the MMMB mobile communication terminal is in idle condition.

With reference to Fig. 6, when mobile communication terminal 400 was in idle condition (step S10) in the zone of asynchronous communication networks 100, primary processor 443 determined whether the value of RSCP is lower than predetermined threshold value TH (step S20).

Be lower than predetermined threshold value TH if determine the value of RSCP in step S20, then primary processor 443 has determined whether to keep during the interval T at the fixed time the value of RSCP wherein to be lower than the state (step S30) of predetermined threshold value TH.

If determine the state that has kept during the interval T at the fixed time the value of RSCP wherein to be lower than predetermined threshold value TH in step S30, then primary processor 443 is used in the synchronous modem 434 of communicating by letter with synchronous communication network 200 and carries out work (step S40).Then, primary processor 443 is converted to synchronous mode (step S50) with current communication pattern, enters synchronous mode idle condition (step S60) then.

Next, describe mode switching method in detail with reference to Fig. 7 according to the MMMB mobile communication terminal of second embodiment of the invention.The difference of the second embodiment of the present invention and first embodiment is, carries out when the MMMB mobile communication terminal is in communications status according to the mode switching method of second embodiment of the invention.

Fig. 7 is the flow chart according to the mode switching method of second embodiment of the invention.

With reference to Fig. 7, when mobile communication terminal 400 was in communications status (step S110) in the zone of asynchronous communication networks 100, primary processor 443 determined whether the value of RSCP is lower than predetermined threshold value TH (step S120).

Be lower than predetermined threshold value TH if determine the value of RSCP in step S120, then primary processor 443 has determined whether to keep during the interval T at the fixed time the value of RSCP wherein to be lower than the state (step S130) of predetermined threshold value TH.

If in step S130, determine the state that has kept during the interval T at the fixed time the value of RSCP wherein to be lower than predetermined threshold value TH, then 443 pairs of block error rates of primary processor (BLER) are monitored (step S140), and this BLER represents the speed of the defect block that per second receives in wireless side.

Then, surpass predetermined threshold value (for example about 10%) if in step S150, determine the BLER that is monitored among the step S140, then primary processor 443 makes synchronous modem 434 carry out work, to prepare communicating (step S160) with synchronous communication network 200.

Here, step S140 and S150 can save, and are not indispensable because they only are only necessary in the second embodiment of the present invention when compensating.Under the situation of saving step S140 and S150, if in step S130, determine the state that has kept during the interval T at the fixed time the value of RSCP wherein to be lower than predetermined threshold value TH, then primary processor 443 makes synchronous modem 434 carry out work, to prepare communicating (step S160) with synchronous communication network 200.

In this case, even make after synchronous modem 434 carries out work, primary processor 443 can not attempted registering to synchronous communication network 200 yet.In addition, primary processor 443 determines the current asynchronous mode that is under the communications status calls out whether finish (step S170).

Finish if determine the communications status of asynchronous mode calling in step S170, then primary processor 443 determines whether mobile communication terminals 400 are positioned at the zone of asynchronous communication networks 100, to enter idle condition (step S180).

If in step S180, determine the zone that mobile communication terminal 400 is positioned at asynchronous communication networks 100, then primary processor enters asynchronous mode idle condition (step S190), under this state, the synchronous modem 434 that carries out work in step S160 is deactivated.

Yet, if in step S180, determine the zone (this means that mobile communication terminal 400 is positioned at the zone of synchronous communication network) that mobile communication terminal 400 is not positioned at asynchronous communication networks 100, then primary processor 443 enters synchronous mode idle condition (step S181), under this state, asynchronous modem controller 424 is deactivated.

Simultaneously, be not over yet if determine the communications status of asynchronous mode calling in step S170, then primary processor 443 determines whether discharge (step S171) with the Radio Links of asynchronous communication networks 100.Particularly, primary processor 443 determines whether mobile communication terminal 400 has left the zone of asynchronous communication networks 100, and when determining that mobile communication terminal 400 has left asynchronous communication networks 100 regional, carry out the mode switch of synchronous mode by the synchronous modem 434 of its operation of beginning in step S160.

Then, primary processor 443 determines to call out whether finish (step S173).Finish if be defined as calling out in step S173, then primary processor 443 execution in step S180 and definite mobile communication terminal 400 current zones of asynchronous communication networks 100 that whether are positioned at are to enter idle condition.If in step S180, be defined as the zone that mobile communication terminal 400 is positioned at asynchronous communication networks 100, then primary processor enters asynchronous mode idle condition (step S190), under this state, the synchronous modem 434 of its operation of beginning is deactivated in step S160.

Yet, if in step S180, be defined as the zone (this means that mobile communication terminal 400 is positioned at the zone of synchronous communication network) that mobile communication terminal 400 is not positioned at asynchronous communication networks 100, then primary processor 443 enters synchronous mode idle condition (step S181), under this state, asynchronous modem controller 424 is deactivated.

Then, be released with the Radio Link of asynchronous communication networks 100 if in step S171, be defined as, then primary processor 443 determines whether the value of RSCP surpasses predetermined threshold value TH, to determine the mobile communication terminal 400 current zones (step S174) that whether are positioned at asynchronous communication networks 100.

Surpassed predetermined threshold value TH if in step S174, be defined as the value of RSCP, then primary processor 443 determine mobile communication terminal 400 current be the zone that is positioned at asynchronous communication networks 100, and close the current synchronous modem of working 434 (step S175), proceed to step S170 then.

Though the parameters R SCP with received signal code power is that example is described above embodiment, replace the RSCP also can be in the identical effect of acquisition among step S20, S120 and the S174 by the performance number RSSI that uses received signal itself.

In addition, can realize the present invention by operation parameter RSCP and RSSI, specifically, measure, in step S20, S120 and S174, they and preset reference value are compared then by the performance number RSSI of sign indicating number power and received signal itself to received signal.

Below with reference to the mode switching method of Fig. 8 detailed description according to the MMMB mobile communication terminal of third embodiment of the invention.A third embodiment in accordance with the invention, the mode switch from the asynchronous mode to the synchronous mode are to carry out according to the system information block that sends from asynchronous communication networks.

Fig. 8 is the flow chart according to the mode switching method of third embodiment of the invention.

With reference to Fig. 8, mobile communication terminal is monitored (step S210) to each system information of subdistricts piece that the air station from asynchronous communication networks sends when carrying out cell selecting.In addition, whether preset the parameter (step S220) of the mode switch of representing synchronous communication network in the system information block that mobile communication terminal is determined to be monitored.

If preset the parameter of the mode switch of representing synchronous communication network in the system information block that is defined as being monitored in step S220, then mobile communication terminal is determined the current preferred asynchronous mode (step S230) that whether is set as of terminal pattern.In preferred asynchronous mode, mobile communication terminal at first is connected with asynchronous communication networks, is connected with synchronous communication network during with the asynchronous communication networks connection failure when it then.

Terminal pattern is current to be set as preferred asynchronous mode if be defined as in step S230, and then mobile communication terminal determines to be included in whether the mobile country code (MCC) in the system information block is country code (first parameter of presetting in step S240; For example for Korea S, parameter value is 450 (MCC=450)), and whether definite mobile network code, MNC (MNC) is network code (second parameter of presetting; For example for SK Telecom Co., Ltd., parameter value are 05 (MNC=05)).

MCC is predetermined to be first parameter and MNC is predetermined to be second parameter if determine in step S240, and then mobile communication terminal is defined as converting to synchronous mode and makes synchronous modem carry out work (step S250).Make after synchronous modem carries out work, mobile communication terminal switches to synchronous mode (step S260) with current communication pattern (asynchronous mode).

If determine current terminal pattern in step S230 is not preferred asynchronous mode, then for example when the terminal pattern of current setting is special-purpose asynchronous mode, even system information block satisfies the condition of mode switch, mobile communication terminal does not carry out mode switch yet, but keeps current asynchronous mode (step S231).

In addition, MCC is not predetermined to be first parameter or MNC is not predetermined to be second parameter if determine in step S240, even then system information block satisfies the condition of mode switch, mobile communication terminal does not carry out mode switch yet, but keeps current asynchronous mode (step S231).

Below with reference to the mode switching method of Fig. 9 detailed description according to the MMMB mobile communication terminal of fourth embodiment of the invention.A fourth embodiment in accordance with the invention, mobile communication terminal carries out the mode switch from the asynchronous mode to the synchronous mode according to the message information commonly used (for example, basic I D information) that sends from synchronous communication network.

Fig. 9 is the flow chart according to the mode switching method of fourth embodiment of the invention.

With reference to Fig. 9, the mobile communication terminal that communicates via synchronous communication network is checked the message information commonly used (step S310) of the BSC 202 of this synchronous communication network 200.Then, MCT determines whether the basic I D information that finds comprises default mode switch parameter (step S320) in step S310.Here, the mode switch parameter is arranged on and is arranged in the position of predefined procedure position (being second in the present embodiment) with respect to highest significant position (MSB) among the basic I D, and is the parameter that is used to notify the overlapping region between asynchronous communication networks and the synchronous communication network.

If the basic I D information that is defined as finding in step S320 in step S310 comprises default mode switch parameter, then mobile communication terminal is determined current whether be set as one of preferred asynchronous mode and preferred synchronous mode (the step S330) of terminal pattern.In preferred asynchronous mode, mobile communication terminal at first is connected with asynchronous communication networks, is connected with synchronous communication network during with the asynchronous communication networks connection failure at it then.In preferred synchronous mode, mobile communication terminal at first is connected with synchronous communication network, is connected with asynchronous communication networks during with the synchronous communication network connection failure at it then.

If determine current one of preferred asynchronous mode and the preferred synchronous mode of being set as of terminal pattern in step S330, then mobile communication terminal is determined mode switch to be asynchronous mode and to make asynchronous modem controller carry out work (step S340).Then, mobile communication terminal switches to asynchronous mode (step S350) with current communication pattern (synchronous mode).

If in step S330, determine current terminal pattern neither preferred asynchronous mode, preferred synchronous mode, but special-purpose synchronous mode, then mobile communication terminal does not carry out mode switch, but keeps current synchronous mode (step S331).

Below with reference to the mode switching method of Figure 10 detailed description according to the MMMB mobile communication terminal of fifth embodiment of the invention.Mode switching method according to fifth embodiment of the invention is a kind of special method, wherein at first determine the mode switch from the asynchronous mode to the synchronous mode, synchronous modem is stopped using and enable asynchronous modem controller, thereby mobile communication terminal works in asynchronous mode.

Figure 10 is the flow chart according to the mode switching method of fifth embodiment of the invention.

With reference to Figure 10, the mobile communication terminal 400 that communicates via synchronous communication network works in synchronous mode (step S410) by synchronous modem.Then, when having determined the mode switch from the asynchronous mode to the synchronous mode (step S420) as mentioned above, mode switching controller 447 is to asynchronous modem controller 434 request mode switch (step S430).Then, asynchronous modem controller 434 carries out work to detect from the signal (step S440) of asynchronous communication networks and to determine whether to exist normal detected signal (step S450).

If be defined as not existing the WCDMA signal in step S450, then asynchronous modem controller 434 sends to mode switching controller 447 and obtains failed message (step S451) synchronously and go forward side by side into state of cutting out or resting state (step S452).

In step S451, receive obtain failed message synchronously after, what mode switching controller 447 identified asynchronous communication networks obtains failure synchronously, and keeps message to keep current state (step S453) to synchronous modem 424 transmit operations.Then, synchronous modem 424 keeps current state (step S454) and mobile communication terminal 400 to continue to operate in synchronous mode.

Simultaneously, detect the WCDMA signal and obtained synchronously if determine in step S450, then asynchronous modem controller 434 requests are to the location registers (step S461) of asynchronous communication networks.When the location information response of the mobile communication terminal in the asynchronous communication networks 400 when this request is registered among the HLR 207 (step S462), HLR207 sends the response (step S463) of this location registers of report.In addition, asynchronous communication networks sends to synchronous modem 434 (step S464) to the response that will report this location registers.

After the response that receives in step S464, synchronous modem 434 sends the message of reporting current state to mode switching controller 447, that is, the message (step S470) to the location registers of asynchronous communication networks has been finished in report.Then, enable asynchronous modem controller 424 and mobile communication terminal 400 and work in asynchronous mode (step S480).

Here, receiving from asynchronous modem controller 434 after location registers finishes message, mode switching controller 447 identifies success and has carried out mode switch to asynchronous communication networks.Then, mode switching controller 447 sends message to synchronous modem 424, with the synchronous modem 424 of stopping using, makes it be in closed condition or resting state (step S471).So synchronous modem 424 is deactivated (step S472) thereby has finished mode switch.

Below with reference to the mode switching method of Figure 11 detailed description according to the MMMB mobile communication terminal of sixth embodiment of the invention.According to the mode switching method of sixth embodiment of the invention is to break down or the more weak method of carrying out can't registration location time that makes in the mode switch process from the asynchronous mode to the synchronous mode of its electric field at synchronous communication network.

Particularly, when asynchronous communication networks breaks down or its electric field is more weak and feasible can't registration location the time, alternately repeated attempt changes to the pattern of synchronous communication network and asynchronous communication networks, thereby cause ping-pong phenomenon, in this ping-pong phenomenon, mobile communication terminal rests on the state that can not communicate by letter constantly.Therefore, when mobile communication terminal when synchronous communication network receives the mode switch order, this mobile communication terminal is attempted the position is registered by detect asynchronous signal under asynchronous mode.When switching went wrong, mobile communication terminal turned back to synchronous mode and periodically attempts detecting asynchronous signal to carry out the mode switch of asynchronous mode.

Figure 11 is the flow chart according to the mode switching method of sixth embodiment of the invention.

With reference to Figure 11, when mobile communication terminal 400 when synchronous communication network 200 receives switching command signal and determine to carry out from synchronous communication network 200 to asynchronous communication networks 100 switching (step S510), mobile communication terminal 400 switches to asynchronous mode (step S520) with its current communication pattern from synchronous mode, and determines whether to detect asynchronous signal (step S530).

If detected asynchronous signal, then mobile communication terminal 400 determines whether to have finished the location registers (step S540) to asynchronous communication networks.If location registers is finished, then mobile communication terminal 400 communicates by asynchronous communication networks.Here, refer to location registers to the location registers of asynchronous communication networks to circuit network (CS) or Packet Service (PS) network.

In addition, if if in step S530, do not detect asynchronous signal or because the caused location registers of some problem failure in the asynchronous communication networks and can't communicating with asynchronous mode, then mobile communication terminal 400 switches back synchronous mode (step S550).

Next, mobile communication terminal 400 is waited for predetermined time interval and the number of times of waiting for is counted (step S560), switches back asynchronous mode (step S520) then and determine whether to have detected asynchronous signal (step S530).Repeat this feedback procedure till the position is registered.

Here, preferably increase the counting interval (it is corresponding to the time interval of detecting asynchronous signal) gradually according to predetermined benchmark (it has reflected the number of times that detects asynchronous signal).Be used for determining that the count parameter in counting interval is comprised in the system parameters that is sent to mobile communication terminal 400 from the air station of asynchronous communication networks.

Therefore, after receiving the mode switch order, mobile communication terminal 400 is identified for detecting counting interval of asynchronous signal according to count parameter, waits for this counting interval and number of times is counted, and searches for asynchronous signal then.

Preferably, default and storage can replace the basic parameter of count parameter in mobile communication terminal, makes mobile communication terminal 400 to determine the counting interval according to the basic parameter of being stored when its count pick up parameter failure.

The parameter that is used to count for example can comprise following information: be used to search for asynchronous signal unit gap T, be used for determining modulus (modulus) A in the time interval of asynchronous signal search, and the max-thresholds Nmax that is used to search for the number of times of asynchronous signal.When the number of times of searching for when 400 pairs of asynchronous signals of mobile communication terminal was set as " n ", mobile communication terminal 400 was determined the counting interval by following equation (1).

t＝A ⁿ*T (1)

In equation (1), the value of " n " (number of times of search asynchronous signal) increases by 1 from 1 to " Nmax " at every turn.In other words, by equation (1), the first counting interval that mobile communication terminal 400 is waited for after location registers is failed for the first time is calculated as " A ⁿ* T ", mobile communication terminal 400 is calculated as " A in location registers counting interval that the back waits for for the second time of failing for the first time ²* T ", and the counting interval that mobile communication terminal 400 is waited for after location registers is failed for the first time for the third time is calculated as " A ³* T ".

When the number of times of search asynchronous signal because the detection asynchronous signal is failed when surpassing threshold value " Nmax " repeatedly, the counting interval is the value of being fixed to " A from that time ^Nmax* T ".

Except above-mentioned parameter and equation (1), can also use multiple parameter and equation to determine the counting interval, and the value of " n " can be 1 between " Nmax ".

The communication pattern that the present invention is only applicable to mobile communication terminal 400 is set as the situation of preferred asynchronous mode or preferred synchronous mode, and the communication pattern that is not suitable for mobile communication terminal 400 is set as the situation of special-purpose asynchronous mode or special-purpose synchronous mode.Therefore, after receiving the mode switch order from synchronous communication network, mobile communication terminal 400 is checked current communication pattern, and preferably, search asynchronous signal when current communication pattern is one of preferred asynchronous mode or preferred synchronous mode.

Below with reference to Figure 12 and 13 mode switching methods of describing in detail according to the MMMB mobile communication terminal of seventh embodiment of the invention.

Figure 12 is used to illustrate the notion according to the mode switch of seventh embodiment of the invention.

With reference to Figure 12, the synchronous communication network zone of the A of company comprises the part in the asynchronous communication networks zone of the part in asynchronous communication networks zone of the A of company and the B of company.At mobile communication terminal 400 is that user terminal and its current communication pattern of the A of company is under the situation of preferred asynchronous mode, and the asynchronous communication networks via the A of company in the overlapping region of mobile communication terminal 400 between the synchronous communication network zone of the asynchronous communication networks zone of the A of company and the A of company communicates.In the A of company single (sole) synchronous communication network zone, mobile communication terminal 400 switches to synchronous mode and communicates via the synchronous communication network of the A of company.

When the mobile communication terminal under the preferred asynchronous mode 400 leaves the asynchronous communication networks zone of the A of company and attempt carrying out location registers in the overlapping region between the synchronous communication network zone of the asynchronous communication networks zone of the B of company and the A of company, mobile communication terminal 400 is at first searched for from the asynchronous communication networks of the B of company but not the asynchronous signal of the synchronous communication network of the A of company, and request is to the location registers of the asynchronous communication networks of the B of company.

Then, the asynchronous communication networks of the B of company is with reference to the user profile of asking the mobile communication terminal 400 of its location registers.When the mobile communication terminal 400 of asking location registers was not the user of the B of company, the asynchronous communication networks of the B of company refusal carried out location registers.Then, the mobile communication terminal 400 of location registers failure switches to the urgency communication state, and in this state, mobile communication terminal 400 only can be handled urgent call via the asynchronous communication networks of the B of company.

In addition, when mobile communication terminal 400 was positioned at the asynchronous communication networks zone of the A of company, location registers also may be rejected.In this case, mobile communication terminal 400 also switches to the urgency communication state.

In the present embodiment, when mobile communication terminal 400 is refused to switch to the urgency communication state owing to location registers by asynchronous communication networks, mobile communication terminal 400 switches to synchronous mode with its communication pattern, thereby can provide all services to mobile communication terminal 400 via the synchronous communication network of the A of company.

As shown in figure 13, when mobile communication terminal 400 was attempted location registers (step S610), mobile communication terminal 400 at first determined whether to have detected asynchronous signal (step S620).

Here, when mobile communication terminal 400 is terminals of preferred asynchronous mode and current when being in asynchronous mode, carry out search to synchronizing signal.Location registers comprises the registration of all situations, the registration when comprising power supply opening, periodically registration, the registration of moving of basis between the sub-district etc.

As this result who determines, when detecting asynchronous signal, mobile communication terminal 400 requests are carried out location registers (step S630) to corresponding asynchronous communication networks.When mobile communication terminal 400 received location registers refuse information (step S640) in response to this request, mobile communication terminal 400 switched to the urgency communication state, and under this state, mobile communication terminal 400 only can be handled urgent call (step S650).

The location registers refuse information can be the message that is sent by this corresponding asynchronous communication networks by can't find user profile with reference to the information in this asynchronous communication networks of being stored in the time at corresponding asynchronous communication networks, perhaps can be owing to the message that some problem sends appears in asynchronous communication networks.

Then, mobile communication terminal 400 switches to synchronous mode (step S660) with its communication pattern, detect synchronizing signal and register its position (step S670) to synchronous communication network, thereby mobile communications network 400 can communicate via this synchronous communication network.

In addition, if do not detect asynchronous signal in step S620, then mobile communication terminal 400 switches to synchronous mode (step S660) with its communication pattern, detects synchronizing signal and will register its position (step S670) to synchronous communication network.

The communication pattern that the present invention is only applicable to mobile communication terminal 400 is set as the situation of preferred asynchronous mode or preferred synchronous mode, and the communication pattern that is not suitable for mobile communication terminal 400 is set as the situation of special-purpose asynchronous mode or special-purpose synchronous mode.

Therefore, preferably, when the attempts registration position, mobile communication terminal 400 is checked current communication pattern and search asynchronous signal when current communication pattern is preferred asynchronous mode.

In the above description, mobile communication terminal switches to synchronous mode with its communication pattern after switching to the urgency communication state.Yet, according to the present invention, mobile communication terminal also can enter the urgency communication state after receiving the location registers refuse information from asynchronous communication networks before, its communication pattern is switched to synchronous mode, because for mobile communication terminal, it is meaningless in fact to enter the urgency communication state.

Industrial usability

It can be seen from the above, the invention provides a kind of multi-mode multi-band mobile communication terminal and mode switching method thereof, it can minimize communication disruption when the asynchronous mobile communication network zone moves to the synchronous mobile communication network area at mobile communication terminal.

In addition, the invention provides a kind of multi-mode multi-band mobile communication terminal and mode switching method thereof, this mode switching method can minimize ping-pong phenomenon when mobile communication terminal carries out mode switch automatically between WCDMA pattern and CDMA pattern.

Though most realistic invention has been described explicitly with preferred embodiment with being considered at present, but should be appreciated that, the present invention is not limited to the disclosed embodiments and accompanying drawing, and on the contrary, it is intended to contain purport and the interior various modifications and variations of scope that fall into claims.

Claims

1, a kind ofly be used under idle condition, making multi-mode multi-band mobile communication terminal between asynchronous mode and synchronous mode, to carry out the method for mode switch, described multi-mode multi-band mobile communication terminal comprises the synchronous modem that is used for the asynchronous modem controller that communicates with asynchronous mobile communication network and is used for communicating with the synchronous mobile communication network, said method comprising the steps of:

(1) measurement is from the power of the received signal of described asynchronous mobile communication network;

(2) whether the value that records power of determining described received signal is lower than predetermined threshold value;

(3) determine whether that interim has kept the value that records power of wherein said received signal to be lower than the state of predetermined threshold value at the fixed time;

(4) when interim has kept described state at the fixed time, make described synchronous modem carry out work; And

(5) current communication pattern is converted to synchronous mode, enters the synchronous mode idle condition then.

2, method according to claim 1, wherein, the power that records in the step (1) is received signal code power (RSCP), and this RSCP is the power of the decoded signal that obtains decoding from the described received signal of described asynchronous mobile communication network by described mobile communication terminal.

3, method according to claim 1, wherein, the power that records in the step (1) comprises power and the RSCP from the described received signal of described asynchronous mobile communication network itself, this RSCP be by described mobile communication terminal to the decode power of the decoded signal that obtains of described received signal, in step (2), the power of described received signal itself and each and described predetermined threshold value among the described RSCP are compared.

4, a kind ofly be used under communications status, making multi-mode multi-band mobile communication terminal between asynchronous mode and synchronous mode, to carry out the method for mode switch, described multi-mode multi-band mobile communication terminal comprises the synchronous modem that is used for the asynchronous modem controller that communicates with asynchronous mobile communication network and is used for communicating with the synchronous mobile communication network, said method comprising the steps of:

(4) when interim has kept described state at the fixed time, make described synchronous modem carry out work;

(5) determine whether the communications status that asynchronous mode is called out finishes;

(6) when the communications status of determining described asynchronous mode calling does not also finish, determine whether be released with the Radio Link of described asynchronous mobile communication network; And

(7) when determining Radio Link with described asynchronous mobile communication network and be released, current communication pattern is converted to synchronous mode, and the synchronous mode calling of being undertaken by described synchronous mobile communication network is handled by described synchronous modem.

5, method according to claim 4, wherein, the power that records in the step (1) is RSCP, this RSCP is the power of the decoded signal that obtains decoding from the described received signal of described asynchronous mobile communication network by described mobile communication terminal.

6, method according to claim 4, wherein, the power that records in the step (1) comprises power and the RSCP from the described received signal of described asynchronous mobile communication network itself, this RSCP be by described mobile communication terminal to the decode power of the decoded signal that obtains of described received signal, in step (2), the power of described received signal itself and each and described predetermined threshold value among the described RSCP are compared.

7, method according to claim 4 wherein, finishes when determine the communications status that described asynchronous mode calls out in step (5), and then described method is further comprising the steps of:

Determine the current zone that whether is positioned at described asynchronous mobile communication network of described mobile communication terminal; And

When described mobile communication terminal is positioned at the zone of described asynchronous mobile communication network, inactive described synchronous modem also enters the asynchronous mode idle condition, and when described mobile communication terminal was not positioned at the zone of described synchronous mobile communication network, inactive described asynchronous modem controller also entered the synchronous mode idle condition.

8, method according to claim 4, wherein, when determining Radio Link with described asynchronous mobile communication network also do not discharge in step (6), described method is further comprising the steps of:

Measurement is from the power of the received signal of described asynchronous mobile communication network;

Whether the value of determining the power of described received signal surpasses predetermined threshold value; And

When the value of the power that is defined as described received signal surpassed described predetermined threshold value, inactive described synchronous modem also returned step (5).

9, method according to claim 8 wherein, when the value of the power that is defined as described received signal surpasses described predetermined threshold value, carries out at described synchronous modem re-executing step (5) under the state of work.

10, method according to claim 4, wherein, described method is further comprising the steps of afterwards in step (7):

Determine whether finish by the described synchronous mode calling that described synchronous modem utilizes described synchronous mobile communication network to carry out;

Call out when having finished when being defined as described synchronous mode, determine the current zone that whether is positioned at described asynchronous mobile communication network of described mobile communication terminal; And

11, method according to claim 4, wherein, step (4) may further comprise the steps:

When the value that records power that is defined as having kept wherein said received signal in step (3) during described predetermined time interval is lower than the state of predetermined threshold value, to block error rate (BLER), this BLER represents the speed of the defect block that per second receives in wireless side;

Described BLER and predetermined threshold value are compared; And

When determining described BLER, make described synchronous modem carry out work above described predetermined threshold value.

12, a kind of method that makes multi-mode multi-band mobile communication terminal between asynchronous mode and synchronous mode, carry out mode switch, described mobile communication terminal comprises the synchronous modem that is used for the asynchronous modem controller that communicates with asynchronous mobile communication network and is used for communicating with the synchronous mobile communication network, said method comprising the steps of:

(1) system information from described asynchronous mobile communication network is monitored;

(2) preset parameter value in the system information of being monitored is checked, to determine whether to carry out mode switch;

(3) when determining described preset parameter value requirement mode switch, make described synchronous modem carry out work; And

(4) making after described synchronous modem carries out work, switch to described synchronous mode.

13, method according to claim 12, wherein, step (3) may further comprise the steps:

Check the current communication pattern of described mobile communication terminal; And

When the current communication pattern of described mobile communication terminal is preferred asynchronous mode, make described synchronous modem carry out work.

14, method according to claim 13, wherein, step (3) may further comprise the steps:

When the current communication pattern of described mobile communication terminal was preferred asynchronous mode, whether the mobile country code of determining to be included in the described system information (MCC) was corresponding with second parameter of the default network code of expression with first parameter of the default country code of expression respectively with mobile network code, MNC (MNC); And

When described mobile country code in the described system information and described mobile network code, MNC are corresponding with described first parameter and described second parameter respectively, make described synchronous modem carry out work.

15, a kind of method that makes multi-mode multi-band mobile communication terminal between asynchronous mode and synchronous mode, carry out mode switch, described mobile communication terminal comprises the synchronous modem that is used for the asynchronous modem controller that communicates with asynchronous mobile communication network and is used for communicating with the synchronous mobile communication network, said method comprising the steps of:

(1) search is from the message information commonly used of described synchronous mobile communication network;

(2) determine whether described message information commonly used comprises the preset mode handoff parameter that is used to carry out mode switch;

(3) when determining described message information commonly used and comprise the preset mode handoff parameter, make described asynchronous modem controller carry out work;

(4) make after described asynchronous modem controller carries out work, the communication pattern of described mobile communication terminal is being switched to described asynchronous mode.

16, method according to claim 15, wherein, described mode switch parameter is set at and is arranged in the position of predefined procedure position with respect to highest significant position (MSB) in the described message commonly used, and is the parameter that is used to notify the overlapping region between described asynchronous communication networks and the described synchronous communication network.

17, method according to claim 15, wherein, step (3) may further comprise the steps:

When the current communication pattern of described mobile communication terminal is preferred asynchronous mode or preferred synchronous mode, make described synchronous modem carry out work.

18, a kind of multi-mode multi-band mobile communication terminal, this mobile communication terminal comprises:

Be used for the asynchronous modem controller that communicates with asynchronous mobile communication network;

Be used for the synchronous modem that communicates with the synchronous mobile communication network; And

Mode switching controller, this mode switching controller is used to manage the current state of described asynchronous modem controller and described synchronous modem, and according to the corresponding communication pattern of mobile communications network under current with described mobile communication terminal, control enabling and stopping using of described asynchronous modem controller and described synchronous modem, wherein:

When determining will carry out mode switch the time, described mode switching controller is used in the respective modem that is connected with the target mobile communications network and carries out work, so that this respective modem is obtained the Network Synchronization line position registration of going forward side by side; And

After having carried out described location registers, described mode switching controller communicates by described respective modem and described target mobile communications network, and another modulator-demodulator inactive and that another mobile communications network communicates.

19, a kind of method that makes multi-mode multi-band mobile communication terminal between asynchronous mode and synchronous mode, carry out mode switch, described mobile communication terminal comprises and is used for a plurality of modulator-demodulators of communicating with asynchronous mobile communication network and synchronous mobile communication network, said method comprising the steps of:

(1), is used in the respective modem that is connected with target mobile communications network and carries out work as the mode switch target when determining to carry out mode switch the time;

(2) obtain Network Synchronization with described target mobile communications network by described respective modem;

(3) execution is to the location registers of described target mobile communications network; And

(4) communicate by described respective modem and described target mobile communications network, and another modulator-demodulator inactive and that another mobile communications network communicates.

20, method according to claim 19, wherein, in step (1) before, when described mobile communication terminal when the zone from described synchronous mobile communication network moves to the zone of described asynchronous mobile communication network when the base station of described synchronous mobile communication network receives the mode switch parameter, determine to carry out mode switch, in the overlapping region of described base station between described asynchronous mobile communication network and described synchronous mobile communication network.

21, method according to claim 19, wherein, in step (1) before, when described mobile communication terminal moves to the zone of described asynchronous mobile communication network from the zone of described synchronous mobile communication network, described mobile communication terminal is monitored the system information from described asynchronous mobile communication network, and in the system information of being monitored, comprise under the situation of the preset parameter value that is used to carry out mode switch, determine to carry out mode switch.

22, method according to claim 19 wherein, in step (1) before, according to the signal strength signal intensity of described asynchronous mobile communication network and the comparative result between the preset signals intensity, determines whether to carry out described mode switch.

23, method according to claim 19 wherein, when the current communication pattern of described mobile communication terminal is preferred asynchronous mode or preferred synchronous mode, is determined to carry out described mode switch.

24, a kind of method that makes multi-mode multi-band mobile communication terminal between asynchronous mode and synchronous mode, carry out mode switch, described mobile communication terminal comprises the synchronous modem that is used for the asynchronous modem controller that communicates with asynchronous mobile communication network and is used for communicating with the synchronous mobile communication network, said method comprising the steps of:

(1) when described mobile communication terminal in the overlapping region between described asynchronous mobile communication network and described synchronous mobile communication network when described synchronous mobile communication network receives system message, the present mode of described mobile communication terminal is switched to asynchronous mode and searches for asynchronous signal, and described system message is represented the mode switch from described synchronous mobile communication network to described asynchronous mobile communication network;

(2) determine whether to have detected asynchronous signal and whether carried out location registers; And

(3) when not detecting asynchronous signal or also not carrying out described location registers, the present mode of described mobile communication terminal is switched to synchronous mode, during the counting interval, wait for and searching times is counted, feed back to step (1) then.

25, method according to claim 24, wherein, step (1) may further comprise the steps:

Check current communication pattern by described mobile communication terminal; And

When described current communication pattern is one of preferred asynchronous mode and preferred synchronous mode, search for described asynchronous signal by described mobile communication terminal.

26, method according to claim 24, wherein, in step (3), the described counting interval increases along with the increase of described searching times.

27, method according to claim 26, wherein, in step (3), described mobile communication terminal receives the system parameters that is used to search for described asynchronous signal from described asynchronous mobile communication network, and determines the described counting interval according to described system parameters.

28, method according to claim 27, wherein, described system parameters comprise the unit gap T that is used to search for described asynchronous signal information, be used for determining the modulus A in the time interval of asynchronous signal search, and

Be used to search for the max-thresholds Nmax of the number of times of described asynchronous signal, and determine the described counting interval by following equation

t＝A ⁿ*T，

Wherein, n represents that described mobile communication terminal searched for the number of times of described asynchronous signal, and the value of n increases by 1 from 1 to " Nmax " at every turn.

29, method according to claim 28, wherein, when the number of times of the described asynchronous signal of search surpasses described threshold value " Nmax ", with the described counting interval value of being fixed as A ^Nmax* T and irrelevant with after this searching times.

30, method according to claim 27, wherein, described system parameters is the system parameters that is received from described asynchronous mobile communication network by described mobile communication terminal and preestablishes and be stored in the system parameters the described mobile communication terminal one.

31, a kind of method that makes multi-mode multi-band mobile communication terminal between asynchronous mode and synchronous mode, carry out mode switch, described mobile communication terminal comprises the synchronous modem that is used for the asynchronous modem controller that communicates with asynchronous mobile communication network and is used for communicating with the synchronous mobile communication network, said method comprising the steps of:

(1) under asynchronous mode, searches for asynchronous signal, and when detecting asynchronous signal, send the request of registering the position of described mobile communication terminal to corresponding asynchronous communication networks by described mobile communication terminal; And

(2) when the described request of registration location is rejected, the current communication pattern of described mobile communication terminal is switched to synchronous mode, detect synchronizing signal, and register the position of described mobile communication terminal to described synchronous communication network.

32, method according to claim 31, wherein, step (1) may further comprise the steps:

When described current communication pattern is preferred asynchronous mode, search for described asynchronous signal by described mobile communication terminal.

33, method according to claim 31, wherein, when the search of being undertaken by described mobile communication terminal in step (1) does not detect asynchronous signal, described mobile communication terminal comes execution in step (2) by following operation: the current communication pattern of described mobile communication terminal is switched to synchronous mode, detect synchronizing signal, and register the position of described mobile communication terminal to described synchronous communication network.

34, method according to claim 32, wherein, when the search of being undertaken by described mobile communication terminal in step (1) does not detect asynchronous signal, described mobile communication terminal comes execution in step (2) by following operation: the current communication pattern of described mobile communication terminal is switched to synchronous mode, detect synchronizing signal, and register the position of described mobile communication terminal to described synchronous communication network.

35, method according to claim 31, wherein, step (2) may further comprise the steps:

When request from location registers to corresponding asynchronous communication networks that carry out is rejected, described mobile communication terminal is switched to the urgency communication state, under this urgency communication state, described mobile communication terminal only can be handled urgent call; And

After switching to the urgency communication state, the current communication pattern of described mobile communication terminal is switched to synchronous mode.