CN103856992B

CN103856992B - Mobile terminal and synchronous tracking method and device

Info

Publication number: CN103856992B
Application number: CN201210507697.2A
Authority: CN
Inventors: 周英楠; 张马
Original assignee: Spreadtrum Communications Tianjin Co Ltd
Current assignee: Spreadtrum Communications Tianjin Co Ltd
Priority date: 2012-11-30
Filing date: 2012-11-30
Publication date: 2017-04-26
Anticipated expiration: 2032-11-30
Also published as: CN103856992A

Abstract

The invention discloses a synchronous tracking method of a mobile terminal and a device thereof. A first terminal card resides in a first network, and a second terminal card resides in a second network. The synchronous tracking method of the mobile terminal contains the following steps: a cell information table group of the second network is established, wherein the cell information table group is composed of a serving cell information table and M adjacent cell information tables; at least based on a synchronous result or channel estimation result of the mobile terminal, the cell information table group is updated; and based on the updated serving cell information table, the position of a target frame of the second network is determined, and with synchronization information of the first terminal card as the reference, the target frame of the second network is received and decoded so as to maintain synchronous tracking of the second terminal card. By the technical scheme, the problem of maintaining synchronous tracking of the second terminal card with the first terminal card as the reference is solved; and with the introduction of the cell information table group and extended frame numbers, the process of synchronous tracking is much faster, and efficiency of a system is raised.

Description

Mobile terminal and its method for synchronized and device

Technical field

The present invention relates to mobile communication technology field, more particularly to a kind of mobile terminal and its method for synchronized and dress Put.

Background technology

No.3 generation mobile communication system with its more efficient spectrum efficiency, higher service quality and security performance and more High service rate, is obtaining the concern of more and more users and is using.But the network of second filial generation mobile communcations system covers Capping is wider, and communication effect is stable, still there is the advantage that its is unique.Therefore, one kind can support No.3 generation mobile communication system, Can support that the multimode multi-card multi-standby mobile terminal of second filial generation mobile communcations system is arisen at the historic moment again.With a kind of existing double-module double-SIM card As a example by double-standby mobile terminal, it mainly supports TD SDMA（TD-SCDMA, Time Division- SynchronousCode Division Multiple Access）And global system for mobile communications（GSM, Global System forMobile Communications）The mobile terminal of two kinds of networks, i.e., can simultaneously be put into one in a mobile terminal TD-SCDMA terminal cards and a GSM terminal card are opened, and it is simultaneously standby in TD-CDMA networks and GSM network respectively.

In single base band injection frequency implementation, when wherein TD-SCDMA terminal cards are standby or carry out business, GSM terminals calorie requirement carrys out the base station synchronization with GSM network on the basis of the synchronizing information of TD-SCDMA terminal cards, further right BCCH（BCCH, Broadcast ControlChannel）Or paging channel（PCH, Paging Channel）Deng Information is received, decoded, to ensure the normal Standby of GSM terminal cards or carry out business.Therefore, GSM terminal cards are as how The synchronized tracking with GSM network base station is kept on the basis of the synchronizing information of TD-SCDMA terminal cards, is to ensure that GSM terminal cards are normal The premise for using and essential condition.But existing technology solve only the problem of the initial synchronisation of dual-SIM-card dual-standby mobile terminal, The problem of follow-up two terminal card synchronized trackings is not accounted for.For example with reference to U.S. Patent Publication No. for US2010222064A1's Patent, discloses a kind of TD-SCDMA/GSM dual-mode dual-card dual-standbies mobile phone, TD-SCDMA in GSM terminal cards in the standby state The base station of TD-SCDMA network is completed on the basis of the terminal card such as how synchronizing information of GSM terminal cards carries out asking for initial synchronisation Topic, but still without solution above-mentioned technical problem.

The content of the invention

The technical solution of the present invention problem to be solved is, in multi-card mobile terminal, when the first terminal card is standby, Keep on the basis of second terminal card synchronizing information of first terminal card as described in how same and the second network base station between Step tracking.

To solve the above problems, technical solution of the present invention provides a kind of method for synchronized of mobile terminal, including：

The cell information table group of the second network is set up, the cell information table group is by a service cell information table and M Information of adjacent cells table is constituted, and wherein M is the number of the adjacent cell of the Serving cell；

Synchronized result or channel estimation results at least based on the mobile terminal, updates the cell information table group, its In, the synchronization includes the synchronization of the synchronous or described second terminal card of the first terminal card, and the channel estimation includes institute State the channel estimation of first terminal card or the channel estimation of the second terminal card；

Based on the service cell information table of the renewal, the position of the target frame of second network is determined, and with described The target frame of second network is received, decoded on the basis of the synchronizing information of first terminal card, to keep the second terminal card Synchronized tracking.

Optionally, the BSIC of the cell of the cell information table including the second network, the frequency point number of the cell of the second network, The initial frame of the frame number of the initial frame of first network, the frame number of the initial frame of the second network and second network is relative to institute The skew of the initial frame of first network is stated, wherein, the initial frame of the first network refers to the first end described in the initial synchronisation moment The frame of the first network that end card is located, the initial frame of second network refers to that second terminal card described in the initial synchronisation moment is located The second network frame, the initial synchronisation moment is the second terminal card with the synchronizing information of the first terminal card as base The moment of the plesiochronous base station to second network.

Optionally, the synchronized result based on the second terminal card, updates the cell information table group, including：

Initial synchronisation result based on the second terminal card is stuck in same after cell switching based on the second terminal Step result, updates the cell information table group.

Optionally, the initial synchronisation result based on the second terminal card, updates the cell information table group, bag Include：

By the initial synchronisation moment, the Serving cell that the synchronizing channel and BCCH of second network are obtained is decoded It is recorded as in the service cell information table and the M information of adjacent cells table with the BSIC and frequency point number of M adjacent cell BSIC and frequency point number；

Initial synchronisation moment, the frame number of the frame of the first network are recorded as into the service cell information table and the M The frame number of the initial frame of the first network in individual information of adjacent cells table；

By the initial synchronisation moment, the frame number of the frame of the Serving cell of second network, second network service it is little The frame in area is recorded as respectively second net in the service cell information table relative to the skew of the frame of the first network The frame number of the initial frame of network, second network initial frame relative to the initial frame of the first network skew；

By initial synchronisation moment, the frame number of the frame of the adjacent cell of the Serving cell of second network, second network The frame of adjacent cell of Serving cell be recorded as the information of adjacent cells table respectively relative to the skew of the frame of the first network In the frame number of initial frame of second network, the initial frame of second network relative to the first network initial frame Skew.

Optionally, it is described that the synchronized result after cell switching is stuck in based on the second terminal, update the cell information Table group, including：

After second terminal card cell switching, the synchronizing channel and BCCH of second network will be decoded The BSIC and frequency point number of the Serving cell for obtaining is recorded as the BSIC in the service cell information table and frequency point number；

With the BSIC and frequency point number in the service cell information table as index, search in the M information of adjacent cells table The information of adjacent cells table of rope matching；

Call frame number, second network of the initial frame of the first network in the information of adjacent cells table of the matching The frame number of initial frame and the initial frame of second network relative to the initial frame of the first network skew, and respectively The frame number of the initial frame of the first network being recorded as in the service cell information table, the initial frame of second network Skew of the initial frame of frame number and second network relative to the initial frame of the first network；

The M of the Serving cell after the switching that the synchronizing channel and BCCH of the second network described in carrying recorded decoding is obtained The BSIC and frequency point number of individual adjacent cell；

With the BSIC and frequency point number of M adjacent cell of the Serving cell after the switching as index, to the M adjacent cell Information table is updated.

Optionally, the BSIC and frequency point number of M adjacent cell of the Serving cell with after the switching is index, to institute State M information of adjacent cells table to be updated, including：

With the BSIC and frequency point number of M adjacent cell of the Serving cell after the switching as index, the M neighbour is searched for little Area's information table；

When BSIC and frequency point number are mismatched, then the BSIC of the adjacent cell of the Serving cell after the switching and frequency point number are remembered Record as the BSIC and frequency point number in the information of adjacent cells table, by initial synchronisation moment, the neighbour of the Serving cell after the switching Skew point of the frame of the adjacent cell of the Serving cell after the frame number of the frame of cell, the switching relative to the frame of the first network The frame number of the initial frame of second network not being recorded as in the information of adjacent cells table, the initial frame phase of second network For the skew of the initial frame of the first network, the frame number of the frame of first network described in the initial synchronisation moment is recorded as described The frame number of the initial frame of the first network in information of adjacent cells table.

Optionally, the channel estimation results based on the second terminal card, update the cell information table group, bag Include：

When the second terminal card carries out BSIC confirmations, channel estimation is carried out to the training sequence of synchronizing channel, obtained The first position deviation of the frame of second network；

When four frame data of broadcast channel or paging channel are received in the second terminal clamping, letter is carried out to every frame data Road is estimated, if the broadcast channel or paging channel decoding result are correct, four to the broadcast channel or paging channel The results averaged of the channel estimation of frame data, obtains the second position deviation of the frame of second network；

At least based on the first position deviation or the second position deviation, the service cell information table is updated respectively With the initial frame of second network in M information of adjacent cells table relative to the initial frame of the first network skew.

Optionally, the synchronized result based on the first terminal card, updates the cell information table group, including：

When the first terminal card carries out synchronization control, if decoding the frame number of the frame of the first network after broadcast channel There is adjustment and adjustment amount is the first frame number deviation, then based on the first frame number deviation, update the service cell information table and M The frame number of the initial frame of the first network in individual information of adjacent cells table；

When the first terminal card carries out synchronization control, if there are adjustment and adjustment amount in the position of the frame of the first network For the 3rd position deviation, then the service cell information table and M information of adjacent cells table are updated based on the 3rd position deviation In second network initial frame relative to the initial frame of the first network skew.

Optionally, the channel estimation results based on the first terminal card, update the cell information table group, bag Include：

In the first terminal card receiving data, channel estimation is carried out to the training sequence of each regular time slots, obtained The adjustment amount of the position of the frame of the first network is the 4th position deviation；

Based on the 4th position deviation, in updating the service cell information table and the M information of adjacent cells table Skew of the initial frame of second network relative to the initial frame of the first network.

Optionally, the service cell information table based on the renewal, determines the position of the target frame of second network Put, and the target frame of second network is received, decoded on the basis of the synchronizing information of the first terminal card, to keep described The synchronized tracking of second terminal card, including：

Counting is extended to the frame number of the frame of the first network, and is recorded as extending frame number, the extension frame number Count frequency is consistent with the count frequency of frame number, and the scope of the extension frame number is N times of the scope of frame number, and N is more than or equal to 2, and when the first network switches, the extension frame number will be counted again；

Based on the extension frame number of the present frame of first network, the extension frame number of the initial frame of the first network and described the The frame number of the initial frame of two networks, determines the frame number of the present frame of the second network；

Based on the frame number of the present frame of second network, the frame number of the target frame of the second network is determined；

Based on the first network initial frame extension frame number, second network initial frame relative to described first The initial frame of network skew and the second network target frame frame number, determine the target frame of first network extension frame number and Skew of the target frame of second network relative to the target frame of the first network；

On the basis of the synchronizing information of the first terminal card, the target frame of second network is received；

On the basis of the synchronizing information of the first terminal card, the target frame of second network is decoded, to keep described The synchronized tracking of second terminal card.

Optionally, the extension of the initial frame of the extension frame number and the first network of the present frame based on first network Frame number, determines the frame number of the present frame of the second network, including：

Calculate the present frame of first network and the extension frame number difference of initial frame；

According to first network and the frame length proportionate relationship and the extension frame number difference of the second network, the second network is calculated Present frame and initial frame the first frame number difference；

Based on the first frame number difference and the frame number of the initial frame of the second network, the frame of the present frame of the second network is determined Number.

Optionally, the frame number of the present frame based on second network, determines the frame number of the target frame of the second network Including：

Obtain the target frame of the second network and the second frame number difference of present frame；

The target frame of the second network is determined based on frame number and the second frame number difference of the present frame of second network Frame number.

Optionally, second network is GSM network, the target frame of the network of the acquisition second and the second frame of present frame Number difference comprises the steps：

Obtain the target frame of second network the corresponding first relative frame number in GSM51 multi-frames；

Calculate the present frame of second network the corresponding second relative frame number in GSM51 multi-frames；

The difference of the described first relative frame number frame number relative with second is calculated, to obtain the second frame number difference.

Optionally, the extension frame number of the target frame of the first network and the target frame of second network are relative to described The computing formula of the skew of the target frame of first network is as follows：

T3=T1₁’+floor（（TD_len*12*Delta_GSM_sfn/13+offset_A₁）/TD_len）

offset_B=(TD_len*12*Delta_GSM_sfn/13+offset_A₁)%TD_len

Wherein, T3 is the extension frame number of the target frame of the first network, T1₁' be the first network initial frame Extension frame number, TD_len is the frame length of the first network frame, and Delta_GSM_sfn is the frame of the target frame of second network Difference number with the frame number of initial frame, offset_A₁For second network initial frame relative to the first network just The skew of beginning frame, offset_B is the skew of the target frame relative to the target frame of the first network of second network, Floor is rounding operation, and % is to take the remainder computing.

To solve the above problems, technical solution of the present invention additionally provides a kind of synchronous follow-up device of mobile terminal, including：

Memory element, for storing the cell information table group of the second network, the cell information table group is little by a service Area's information table and M information of adjacent cells table composition, wherein M is the number of the adjacent cell of the Serving cell；

Updating block, for being at least based on the synchronized result or channel estimation results of the mobile terminal, updates described little Area's information table group, wherein, the synchronization includes the synchronization of the synchronous or described second terminal card of the first terminal card, the letter Estimate to include the channel estimation of the first terminal card or the channel estimation of the second terminal card in road；

Synchronized tracking unit, for the service cell information table based on the renewal, determines the target of second network The position of frame, and the target frame of second network is received, decoded on the basis of the synchronizing information of the first terminal card, to protect Hold the synchronized tracking of the second terminal card.

Optionally, the BSIC of the cell of the cell information table including the second network, the frequency point number of the cell of the second network, The initial frame of the frame number of the initial frame of first network, the frame number of the initial frame of the second network and second network is relative to institute The skew of the initial frame of first network is stated, wherein, the initial frame of the first network refers to the first end described in the initial synchronisation moment The frame of the first network that end card is located, the initial frame of second network refers to that second terminal card described in the initial synchronisation moment is located The second network frame, the initial synchronisation moment is the second terminal card on the basis of the synchronizing information of the first network It is synchronized to the moment of the base station of second network.

Optionally, the updating block at least includes following any cell：

First updating block, for the initial synchronisation result based on the second terminal card or based on the second terminal card Synchronized result after cell switching, updates the cell information table group；

Second updating block, for the channel estimation results based on the second terminal card, updates the cell information table Group；

3rd updating block, for the synchronized result based on the first terminal card, updates the cell information table group；

4th updating block, for the channel estimation results based on the first terminal card, updates the cell information table Group.

Optionally, the synchronized tracking unit, including：

Extension frame number counting unit, for being extended the frame number of the frame of the first network counting, and is recorded as expanding Exhibition frame number, the scope of the extension frame number is N times of the scope of frame number, the counting of the count frequency and frame number for extending frame number Frequency is consistent, and N is more than or equal to 2, and when the first network switches, the extension frame number will be counted again；

First determining unit, for the initial frame based on the extension frame number of the present frame of first network, the first network Extension frame number and the second network initial frame frame number, determine the frame number of the present frame of the second network；

Second determining unit, for the frame number based on the present frame of second network, determines the target frame of the second network Frame number；

3rd determining unit, for based on the extension frame number of the initial frame of the first network, second network just Beginning frame determines the mesh of first network relative to the frame number of the target frame of the skew and the second network of the initial frame of the first network Mark the skew of the extension frame number of frame and the target frame of second network relative to the target frame of the first network.

Frame receiving unit, on the basis of the synchronizing information of the first terminal card, receiving the mesh of second network Mark frame；

Frame decoding unit, on the basis of the synchronizing information of the first terminal card, decoding the mesh of second network Mark frame, to keep the synchronized tracking of the second terminal card.

Compared with prior art, in the method for synchronized and device of the mobile terminal that technical solution of the present invention is proposed, draw Enter the concept of cell information table group, the synchronizing information of Serving cell has been saved in the cell information table group, it is little based on servicing The synchronizing information mobile terminal in area can be accurately positioned the position of the target frame of the second network, so as to complete target frame reception and Decoding, finally makes the second terminal card keep on the basis of the synchronizing information of the first terminal card and second network Base station synchronization.Real-time update to synchronizing information in cell information table group, it is ensured that the second terminal card to described The synchronized tracking of the base station of two networks.

Also, also include M information of adjacent cells table in cell information table group, can be used for when the second terminal is sticked into When row cell switches, the cell information table of the adjacent cell for being switched to Serving cell is directly invoked, simplify synchronizing process, improved Synchronizing speed.

In addition, being calculated using the extension frame number for counting cycle stretch-out, the computation complexity of frame position determination is simplified. Meanwhile, during the relative position from the frame of the second Network Capture in system-frame to be directly applied to the calculating for determining frame position, enter One step simplifies the flow process of calculating, improves the efficiency of calculating, so as to improve the operational performance and efficiency of mobile terminal.

Description of the drawings

Fig. 1 is the schematic flow sheet of the method for synchronized of the mobile terminal of technical solution of the present invention；

Fig. 2 is that the embodiment of the present invention based on the second terminal is stuck in the synchronized result after cell switching, is updated described The schematic flow sheet of cell information table group；

Fig. 3 is the channel estimation results based on the second terminal card of the embodiment of the present invention, updates the cell information The schematic flow sheet of table group；

Fig. 4 is the synchronized result based on the first terminal card of the embodiment of the present invention, updates the cell information The schematic flow sheet of table group；

Fig. 5 is the embodiment of the present invention based on the service cell information table for updating, the stream of second terminal card holding synchronized tracking Journey schematic diagram；

Fig. 6 is the schematic flow sheet that the target frame position of second network of the embodiment of the present invention determines；

Fig. 7 is the structural representation of the GSM51 multi-frames of the embodiment of the present invention；

Fig. 8 is the structural representation of the synchronous follow-up device of the mobile terminal of technical solution of the present invention；

Fig. 9 is the structural representation of synchronized tracking unit shown in Fig. 8 13.

Specific embodiment

The application of multi-card mobile terminal at present is more and more extensive, but the resident network of each card of multi-card mobile terminal Cell is general and asynchronous, when wherein a terminal card is standby, on the basis of the other-end card such as how terminal card, keeps synchronous Tracking, becomes the urgent technical barrier for needing to solve at present.

For the problem, a kind of method for synchronized of mobile terminal is inventors herein proposed, as shown in figure 1, including：

Step S1, sets up the cell information table group of the second network, and the cell information table group is by a service cell information Table and M information of adjacent cells table composition, wherein M is the number of the adjacent cell of the Serving cell；

Step S2, the synchronized result or channel estimation results at least based on the mobile terminal updates the cell information Table group, wherein, the synchronization includes the synchronization of the synchronous or described second terminal card of the first terminal card, the channel estimation The channel estimation of channel estimation or the second terminal card including the first terminal card；

Step S3, based on the service cell information table of the renewal, determines the position of the target frame of second network, and The target frame of second network is received, decoded on the basis of the synchronizing information of the first terminal card, to keep described second The synchronized tracking of terminal card.

The mobile terminal can be dual-mode dual-card dual-standby or multimode dual-SIM-card dual-standby mobile terminal, and the mobile terminal can be with Using single base band injection frequency scheme.The second terminal card can be arbitrary in addition to the first terminal card in mobile terminal Terminal card.The first network can be Generation Mobile Telecommunication System network, such as global system for mobile communications（GSM, Global System for Mobile Communications）Network, CDMA are accessed（CDMA, Code Division Multiple Access）Network；Can also be 3 G mobile communication network, such as Time division multiple access（TD- SCDMA, TimeDivision-Synchronous Code Division Multiple Access）Network, wideband code division are more Access location（WCDMA, Wide Code Division Multiple Access）Network；Can also be Long Term Evolution（LTE, Long Term Evolution）Network.Second network can be Generation Mobile Telecommunication System network, 3G (Third Generation) Moblie Network or LTE network.

It is understandable to enable the above objects, features and advantages of the present invention to become apparent from, below with first network as TD- SCDMA networks, the second network is as a example by GSM network, technical solution of the present invention to be described in detail with reference to accompanying drawing.Shown in Fig. 1 For the schematic flow sheet of the method for synchronized of the mobile terminal of technical solution of the present invention：

Step S1：The cell information table group of the second network is set up, the cell information table group is by a service cell information Table and M information of adjacent cells table composition, wherein M is the number of the adjacent cell of the Serving cell.The cell information table includes The BSIC of the cell of the second network, the frequency point number of the cell of the second network, the frame number of the initial frame of first network, second network Skew of the initial frame of the frame number of initial frame and second network relative to the initial frame of first network.In the present embodiment In, the initial frame of the first network refers to the frame of the first network that first terminal card described in the initial synchronisation moment is located, described The initial frame of the second network refers to the frame of the second network that second terminal card described in the initial synchronisation moment is located.In present invention enforcement In single base band implementation of example, the initial synchronisation moment refers to the second terminal card with the synchronizing information of the first terminal card On the basis of be synchronized to second network base station moment.The first network in the service cell information table The initial frame of the frame number of initial frame, the frame number of the initial frame of second network and second network is relative to described first The skew of the initial frame of network, mobile terminal is assured that phase of the target frame of second network in the first network To position, the target frame of the second network is then received and decoded on the basis of the synchronizing information of first terminal card, make second terminal And the holding synchronized tracking between the base station of the second network.

With the movement during the mobile terminal use, second terminal card there is also from Serving cell to adjacent cell Cell switching, be now accomplished by obtaining the information of the adjacent cell for being switched to Serving cell complete the second network it is synchronous with Track.Therefore inventors herein propose while service cell information table is set up, the method for also setting up information of adjacent cells table, to work as When second terminal card carries out cell switching, the cell information table of the adjacent cell for being switched to Serving cell can be directly invoked, and The speed of system synchronization tracking need not be accelerated after cell switching again from the synchronizing information that system acquisition is related.Typically, The number of information of adjacent cells table is M, and the value of M is the number of the adjacent cell that the second network system specifies.Meanwhile, cell information table In BSIC information and frequency point number information primarily to distinguish, index each cell information table.

Step S2：Synchronized result or channel estimation results at least based on the mobile terminal, updates the cell information Table group, wherein, the synchronization includes the synchronization of the synchronous or described second terminal card of the first terminal card, the channel estimation The channel estimation of channel estimation or the second terminal card including the first terminal card.

Wherein, the synchronization of the first terminal card refers to synchronous between first terminal card and the base station of first network, institute State second terminal card synchronization refer to second terminal card on the basis of the synchronizing information of first terminal card with the base station of the second network Between synchronization.

Specifically, step S2 can be divided into following four situation, and in actual applications, step S2 is probably following any one Plant or several situations：

The first situation：Initial synchronisation result based on the second terminal card is stuck in cell based on the second terminal Synchronized result after switching, updates the cell information table group；

Second situation：Based on the channel estimation results of the second terminal card, the cell information table group is updated；

The third situation：Based on the synchronized result of the first terminal card, the cell information table group is updated；

4th kind of situation：Based on the channel estimation results of the first terminal card, the cell information table group is updated.

Four kinds of situations are described in detail respectively below.

The first situation：Initial synchronisation result based on the second terminal card is stuck in cell based on the second terminal Synchronized result after switching, updates the cell information table group.

The initial synchronization of the second terminal card, that is, the cell information table group carries out initialized process. When the second terminal card is on the basis of the synchronizing information of the first terminal card, the base station of second network is synchronized to first When, by parameters directly from the system acquisition cell information table group, specifically, by the initial synchronisation moment, decode institute State the synchronizing channel of the second network（SCH, Synchronous Channel）And BCCH（BCCH, Broadcasting Control Channel）The BSIC and frequency point number of the Serving cell for obtaining is recorded as the BSIC in the service cell information table The BSIC and frequency point number that decode M adjacent cell of the Serving cell that SCH and BCCH is obtained are recorded as into respectively the M with frequency point number BSIC and frequency point number in individual information of adjacent cells table；Initial synchronisation moment, the frame number of the frame of the first network are recorded as into institute State the frame number of the initial frame of the first network in service cell information table and the M information of adjacent cells table；To be initially same At the step moment, the frame number of the frame of the Serving cell of second network, the frame of the Serving cell of second network are relative to described The skew of the frame of first network be recorded as respectively the initial frame of second network in the service cell information table frame number, Skew of the initial frame of second network relative to the initial frame of the first network；By the initial synchronisation moment, described second The frame number of the frame of the adjacent cell of the Serving cell of network, the frame of the adjacent cell of the Serving cell of second network are relative to described The skew of the frame of first network is recorded as respectively frame number, the institute of the initial frame of second network in the information of adjacent cells table State the skew of the initial frame relative to the initial frame of the first network of the second network.

During the second terminal is stuck in use, from Serving cell to the switching of the cell of a certain adjacent cell very often See, the information of adjacent cells table of matching now directly can be searched for and called in information of adjacent cells table, this with reference to shown in Fig. 2 Bright embodiment based on the second terminal is stuck in the synchronized result after cell switching, updates the flow process of the cell information table group Schematic diagram, is first carried out step S201：Decoding SCH and BCCH obtains the BSIC and frequency point number of the Serving cell of the second network（ Be exactly switching after Serving cell BSIC and frequency point number）, and it is recorded as BSIC and frequency in the service cell information table Number.

Then execution step S202：With the BSIC and frequency point number in the service cell information table as index, at the M The information of adjacent cells table of matching is searched in information of adjacent cells table.

Again execution step S203, directly invokes the information of adjacent cells table of the matching, by the information of adjacent cells of the matching The frame number of the initial frame of the first network in table, the frame number of the initial frame of second network and second network Initial frame is accordingly filled in the service cell information table relative to the skew of the initial frame of the first network.

Execution step S204：After the switching that the synchronizing channel and BCCH of the second network described in carrying recorded decoding is obtained Serving cell M adjacent cell BSIC and frequency point number.

Last execution step S205：BSIC and frequency point number with M adjacent cell of the Serving cell after the switching is as rope Draw, the M information of adjacent cells table is updated.When the second terminal card of mobile terminal is cut from the Serving cell of the second network After shifting to adjacent cell, new adjacent cell list simply may partly there occurs in change, therefore the step, only to adjacent cell list The information of adjacent cells table of middle change is updated, and unchanged information of adjacent cells is still retained and is not updated.Specifically, with institute The BSIC and frequency point number for stating M adjacent cell of the Serving cell after switching is index, searches for the M information of adjacent cells table, when BSIC and frequency point number are mismatched, then the BSIC and frequency point number of the adjacent cell of the Serving cell after the switching are recorded as into the neighbour BSIC and frequency point number in cell information table, by the initial synchronisation moment, the frame of the adjacent cell of the Serving cell after the switching The frame of the adjacent cell of the Serving cell after frame number, the switching is recorded as respectively institute relative to the skew of the frame of the first network The frame number of initial frame, the initial frame of second network of second network in information of adjacent cells table are stated relative to described The skew of the initial frame of one network, by the frame number of the frame of first network described in the initial synchronisation moment information of adjacent cells is recorded as The frame number of the initial frame of the first network in table.

Second situation：Based on the channel estimation results of the second terminal card, the cell information table group is updated.Channel The Main Function of estimation is the details for obtaining channel, and such mobile terminal can make phase in docking collection of letters road when signal is received The compensation answered and adjustment, further correctly demodulate the signal of reception, improve the performance of system.The result of channel estimation is included Amplitude information and phase information, i.e. channel estimation are followed by the amplitude and receiving position of the collection of letters number all may be adjusted.Work as reception When the received bit of signal is equipped with adjustment, it is necessary to which cell information table group is updated.

In the embodiment of the present invention, the channel estimation of the second terminal card includes two kinds, and one kind is the second terminal card When BSIC confirmations are carried out, the channel estimation that the training sequence of synchronizing channel is carried out, another is the second terminal card When four frame data of broadcast channel or paging channel are received, the channel estimation that every frame data are carried out.Channel estimation calculation After the completion of, the adjustment amount of the position of the frame of second network can be obtained, then according to the position of the frame of second network Adjustment amount, is updated to cell information table group.

Specifically, the channel estimation results based on the second terminal card of the embodiment of the present invention with reference to shown in Fig. 3, more The schematic flow sheet of the new cell information table group, by taking the first channel estimation as an example, is first carried out step S301, described the When two terminal cards carry out BSIC confirmations, channel estimation is carried out to the training sequence of synchronizing channel, obtain the frame of second network Position adjustment amount Gsm_irt.

Execution step S302 is performed again, the unit of Gsm_irt is converted to into eight from the GSM symbol lengths of a quarter/ One TD-SCDMA chip lengths, obtain first position deviation D elta_time2_offset1.

Then execution step S303, according to formula is calculated as below service cell information table and information of adjacent cells table are updated successively In second network initial frame relative to the initial frame of the first network skew offset_A_N：

offset_A_N=offset_A_N+Delta_time2_offset1

Wherein the span of subscript N is 1 to M+1, and Serving cell is expressed as when being 1, and 2 arrive M+1, are represented sequentially as first It is individual to m-th adjacent cell.Due to the offset_A after renewal_NLength may be more than the length of TD-SCDMA frame, because This wants execution step S304, judges the offset_A after updating_NLength whether more than length TD_ of a TD-SCDMA frame len.If being not more than, execution step S305, service cell information table and the offset_ in M information of adjacent cells table are updated successively A_N；If being more than, execution step S306 needs to update simultaneously described the in service cell information table and M information of adjacent cells table Skew offset_A of the initial frame of two networks relative to the initial frame of the first network_NWith the frame of the initial frame of first network Number T1_N, computing formula is as follows：

offset_A_N=offset_A_N+(offset_A_N%TD_len)

T1_N=T1_N+floor(offset_A_N/TD_len)

Wherein the span of subscript N is 1 to M+1, and Serving cell is expressed as when being 1, and 2 arrive M+1, are represented sequentially as first It is individual to m-th adjacent cell, % is complementation, and floor is rounding operation.

When the second terminal card carries out second channel estimation, the second terminal clamping receive broadcast channel or During four frame data of paging channel, channel estimation is carried out to every frame data, if the broadcast channel or paging channel of the second network Decoding result is correct, to the broadcast channel or the results averaged of the channel estimation of four frame data of paging channel, obtains To the second position deviation of the frame of second network；Then cell information table group, its process are updated according to second position deviation It is similar with above-mentioned steps S303 ~ S306, will not be described here.

The third situation：Based on the synchronized result of the first terminal card, the cell information table group is updated.Described first Terminal card is completed after initial synchronisation with the base station of the first network, can also carry out periodically thick synchronous and essence synchronous to ensure The synchronization accuracy of the first terminal card.After every time thick synchronous and essence is synchronously completed, all may be to the frame of the first network Position be adjusted, therefore, when synchronization control is carried out in the first terminal card, if decoding broadcast channel after described first The frame number of the frame of network has adjustment and adjustment amount is the first frame number deviation, then based on the first frame number deviation, update the clothes The frame number of the initial frame of the first network in business cell information table and M information of adjacent cells table；If the first network The position of frame has adjustment and adjustment amount is the 3rd position deviation, then update the Serving cell letter based on the 3rd position deviation The initial frame of second network in breath table and M information of adjacent cells table is relative to the inclined of the initial frame of the first network Move.

Specifically, the synchronized result described in the embodiment of the present invention with reference to shown in Fig. 4 based on the first terminal card, more The schematic flow sheet of the new cell information table group, is first carried out step S401, and the frame of the first network is obtained from system The adjustment amount of position, i.e. the 3rd position deviation Delta_time1_offset.

Again execution step S402, updates successively in service cell information table and information of adjacent cells table according to formula is calculated as below Second network initial frame relative to the initial frame of the first network skew offset_A_N：

offset_A_N=offset_A_N+Delta_time1_offset

Wherein the span of subscript N is 1 to M+1, and Serving cell is expressed as when being 1, and 2 arrive M+1, are represented sequentially as first It is individual to m-th adjacent cell.

Then execution step S403, judges the offset_A after updating_NLength whether be more than TD_len.

If being not more than, execution step S404, update successively in service cell information table and M information of adjacent cells table offset_A_N；If being more than, execution step S405 needs to update simultaneously in service cell information table and M information of adjacent cells table offset_A_NAnd T1_N, computing formula is as follows：

offset_A_N=offset_A_N+(offset_A_N%TD_len)

T1_N=T1_N+floor(offset_A_N/TD_len)

Wherein the span of subscript N is 1 to M+1, and Serving cell is expressed as when being 1, and 2 arrive M+1, are represented sequentially as first To m-th adjacent cell, % is complementation, and floor is rounding operation.

In addition, when the first terminal is stuck in every time thick synchronous and synchronous essence, decoding first network decoding broadcast channel BCH The frame number of the frame of the first network for obtaining may have adjustment, and it is Δ T1 that adjustment amount is the first frame number deviation_N, can be according to following public affairs Formula directly updates the frame of the initial frame of the first network in the service cell information table and the M information of adjacent cells table Number：

T1_N=T1_N+ΔT1_N

4th kind of situation：Based on the channel estimation results of the first terminal card, the cell information table group is updated.It is described When first terminal is stuck in receiving data, channel estimation can be done to the training sequence of each regular time slots, obtain the first network Frame position adjustment amount so that system reaches better performance.It is normal to each when first first terminal is stuck in receiving data The training sequence of rule time slot carries out channel estimation, obtains the adjustment amount of the position of the frame of first network, i.e. the 4th position deviation Delta_time1_offset1, is then carried out according to the 4th position deviation Delta_time1_offset1 to cell information table group Update, the specific step that updates is consistent with the renewal step described in the third situation, will not be described here.

Step S3：Based on the service cell information table of the renewal, the position of the target frame of second network is determined, and The target frame of second network is received, decoded on the basis of the synchronizing information of the first terminal card, to keep described second The synchronized tracking of terminal card.

Specifically, service cell information table of the embodiment of the present invention based on renewal with reference to shown in Fig. 5, second terminal card keeps The schematic flow sheet of synchronized tracking, is first carried out step S501, will the extension of the frame number of the frame of the first network is counted as expanding Exhibition frame number.Wherein, the count frequency of the extension frame number is consistent with the count frequency of frame number, and the scope of the extension frame number is frame Number N times of scope, N is more than or equal to 2, and when the first network switches, the extension frame number will be counted again.This Inventive technique scheme proposes the concept and related algorithm of extension frame number, and the scope for extending frame number is N times of scope of frame number, institute The count frequency for stating extension frame number is consistent with the count frequency of frame number, and N is more than or equal to 2, and using the extension frame number frame number is carried out Counting, extend the counting cycle of frame number, it is possible to reduce the number of times for counting again of frame number, so as to simplify calculating.Moving An extension frame number counter can be designed in terminal, for counting to extending frame number.N can according to practical application, with reference to System determines to counting cycle of frame number and the first network with the switching cycle of the second network.In the present embodiment, TD- The frame number scope of SCDMA is from 0x0000 to 0x1FFF（With hexadecimal representation）, step-length is 2.If directly using TD- The frame number of SCDMA is calculated, and often crosses the frame number that will in the algorithm update TD-SCDMA for 40.96 seconds, in the calculation may There is the phenomenon of frame number multicycle repetition, the EMS memory occupation of system can be increased and extend the time of calculating.When mobile terminal occurs Network switching, the System Frame Number of network also will be counted again, can equally be brought increase Installed System Memory and be extended the calculating time not Profit affects.System Frame Number is extended after calculating, it is possible to solve the problems, such as above-mentioned.Extension in the present embodiment, after extension The scope of frame number is 0x00000000 ~ 0x3FFFFFFF, and the counting cycle for extending frame number is roughly equivalent to 62 days.Normal conditions Under, within 62 days, there is switching of the TD-SCDMA network to another network, when there is network switching, extension to I haven't seen you for ages Frame number is counted again, it is difficult to there is the repeat count of the extension frame number of TD-SCDMA network.

Then execution step S502：Based on the extension frame number of the present frame of first network, the initial frame of the first network Extension frame number and second network initial frame frame number, determine the frame number of the present frame of the second network.With reference to shown in Fig. 6 The embodiment of the present invention second network target frame position determine schematic flow sheet, the TD-SCDMA is calculated first The present frame of network and extension frame number difference Delta_TD_esfn1 of initial frame, i.e. Delta_TD_esfn1=T2-T1₁', its Middle T1₁' for first network initial frame extension frame number, T2 for first network present frame extension frame number（Extend frame number The current count value of enumerator）；The frame length GSM_ of frame length TD_len and GSM network then according to TD-SCDMA network The proportionate relationship of len, i.e. 12*TD_len=13*GSM_len, can obtain the first frame number of the second network present frame and initial frame Difference Delta_GSM_sfn, i.e. Delta_GSM_sfn1=ceil (Delta_TD_esfn1*12/13), wherein ceil is for upwards Rounding operation；Then, the frame number G1 based on the first frame number difference Delta_GSM_sfn1 and the initial frame of GSM network can To obtain the frame number G2 of the present frame of GSM network, i.e. G2=G1+Delta_GSM_sfn1.

Execution step S503 again：Based on the frame number of the present frame of second network, the target frame of the second network is determined Frame number.What mobile terminal from GSM network system was obtained is the relative frame number in GSM51 multi-frames, to determine the mesh of the second network The frame number of mark frame, in addition it is also necessary to know the frame number of the GSM51 multi-frames after synchronization, calculates more complicated.And in the present embodiment, it is directly sharp Then relative frame number with the frame obtained from GSM network in GSM51 multi-frames calculates described second calculating the second frame number difference The frame number of the target frame of network, further simplify the flow process of calculating, improve the efficiency of calculating.

Specifically, step S503 includes：Obtain the target frame of the second network and the second frame number difference of present frame；Based on institute State the second network present frame frame number determine with the second frame number difference the second network target frame frame number.Second net The target frame of network is the second terminal card frame to be received.Wherein, the target frame for obtaining the second network and present frame Second frame number difference includes：Obtain the target frame of second network the corresponding first relative frame number in GSM51 multi-frames；Calculate The present frame of second network corresponding second relative frame number in GSM51 multi-frames；Calculate the described first relative frame number and the The difference of two relative frame numbers, to obtain the second frame number difference.The structure of GSM51 multi-frames is as shown in fig. 7, F represents frequency in Fig. 7 Rate corrects channel（FCCH, Frequency Correction Channel）Frame, per lattice 1 frame is represented；S represents SCH frames, per lattice generation The frame of table 1；B represents BCCH frames, and per lattice 4 frames are represented；C represents CCCH（CCCH, Common Control Channel） Frame, 4 frames are represented per lattice, and CCCH can carry PCH and extension BCCH；I represents Idle frames, and per lattice 1 frame is represented.With the second network Target frame is as a example by BCCH frames, with reference to reference to Fig. 6 and Fig. 7, by the frame number G2 of the present frame of second network divided by 51 remainders Number, can just obtain the described second relative frame number of the present frame in GSM51 multi-frames of second network, if described first is relative More than the second relative frame number, the second frame number difference Delta_GSM_sfn2 is equal to the described first relative frame number and deducts frame number Second relative frame number, if the described first relative frame number is less than the second relative frame number, the second frame number difference Delta_GSM_ Sfn2 is equal to the described first relative frame number plus 51 and deducts the described second relative frame number again.Assume need receive BCCH framing bits in 5th C frame, the frame number of the present frame of the second network is 120, then the described first relative frame number is just 27, and described second is relative Frame number is just 18, and the second frame number difference Delta_GSM_sfn2 is just 9.The frame number G3=of the target frame of second network G2+Delta_GSM_sfn2.With reference to the calculating of the frame number of the present frame of the second network described in step S502, G3=can be obtained G1+Delta_GSM_sfn1+Delta_GSM_sfn2, the frame number difference between the target frame and initial frame of second network Delta_GSM_sfn=Delta_GSM_sfn1+Delta_GSM_sfn2。

Execution step S504 again：Based on the first network initial frame extension frame number, second network it is initial Frame determines the target of first network relative to the frame number of the target frame of the skew and the second network of the initial frame of the first network Frame extension frame number and second network target frame relative to the target frame of the first network skew.

Specifically, the extension frame number T3 of the target frame of the first network determines according to following formula：

T3=T1₁’+floor（（TD_len*12*Delta_GSM_sfn/13+offset_A₁）/TD_len）

Wherein, floor is rounding operation.

The target frame of second network relative to the target frame of first network skew offset_B according to following formula It is determined that：

offset_B=(TD_len*12*Delta_GSM_sfn/13+offset_A₁)%TD_len

Wherein, % is remainder operation.

It should be noted that the offset_A being related in step in the present embodiment₁, offset_B, TD_len and GSM_ The unit of len is 1/8th chip lengths of TD-SCDMA.

Last execution step S505：Extension frame number and second network based on the target frame of the first network Target frame on the basis of the synchronizing information of the first terminal card, receives described relative to the skew of the target frame of first network The target frame of the second network, the target frame for decoding second network, to keep the synchronized tracking of the second terminal card.

It should be noted that the offset_A being related in step in the present embodiment_N, offset_B, TD_len and GSM_ The unit of len is 1/8th chip lengths of TD-SCDMA.And offset_A_N、offset_B、Delta_time1_ Offset, Delta_sfn1_offset, Delta_time2_offset1 are the value of symbol, represent delayed when being positive number, For negative when represent advanced.Meanwhile, the related calculating being related in step S1 to S3 is also signed calculating.

Based on the method for synchronized of above-mentioned mobile terminal, technical solution of the present invention also provides a kind of synchronization of mobile terminal Tracks of device.Fig. 8 is the structural representation of the synchronous follow-up device of the mobile terminal of technical solution of the present invention, described refering to Fig. 8 The synchronous follow-up device of mobile terminal includes：Memory element 11, for storing the cell information table group of the second network, the storage Unit group is made up of a service cell information table storing sub-units and M information of adjacent cells table storing sub-units, and wherein M is institute State the number of the adjacent cell of Serving cell；Updating block 12, for being at least based on the synchronized result or channel of the mobile terminal Estimated result, updates the cell information table group, wherein, the synchronization includes synchronous or described the second of the first terminal card The synchronization of terminal card, the channel estimation includes that the channel estimation of the first terminal card or the channel of the second terminal card are estimated Meter；Synchronized tracking unit 13, for the service cell information table based on the renewal, determines the target frame of second network Position, and the target frame of second network is received, decoded on the basis of the synchronizing information of the first terminal card, to keep State the synchronized tracking of second terminal card.

In the present embodiment, the updating block 12 includes the first updating block 121, for based on the second terminal card Initial synchronisation result is stuck in the synchronized result after cell switching based on the second terminal, updates the cell information table group； Second updating block 122, for the channel estimation results based on the second terminal card, updates the cell information table group；The Three updating blocks 123, for the synchronized result based on the first terminal card, update the cell information table group；4th updates Unit 124, for the channel estimation results based on the first terminal card, updates the cell information table group.In other enforcements In example, the updating block 12 can also include any of the above-described kind or appoint several.

In embodiments of the present invention, first updating block 121 includes：First updates subelement, for based on described The initial synchronisation result of second terminal card, updates the cell information table group；Second updates subelement, for based on described second Synchronized result of the terminal card after cell switching, updates the cell information table group.

The first renewal subelement includes：First acquisition unit, for the initial synchronisation moment to be decoded into second net The Serving cell and the BSIC and frequency point number of the M adjacent cell that the synchronizing channel and broadcast channel of network is obtained is recorded as institute State the BSIC and frequency point number in service cell information table；Second acquisition unit, for by first network described in the initial synchronisation moment Frame frame number be recorded as the first network in the service cell information table initial frame frame number；3rd obtains single Unit, for by the Serving cell of the frame number of the frame of the Serving cell of the second network, second network described in the initial synchronisation moment Frame relative to the frame of the first network skew, second network being recorded as respectively in the service cell information table The frame number of initial frame, the initial frame of second network relative to the initial frame of the first network skew；4th obtains Unit, for by the frame number of the frame of the adjacent cell of the Serving cell of the second network, second network described in the initial synchronisation moment Serving cell adjacent cell frame relative to the side-play amount of the frame of the first network, the information of adjacent cells is recorded as respectively The frame number of the initial frame of second network in table and the initial frame of second network are relative to the first network The skew of initial frame.

The second renewal subelement includes：First recording unit, for after second terminal card cell switching, inciting somebody to action The BSIC and frequency point number for decoding the Serving cell that the synchronizing channel and BCCH of second network are obtained is recorded as institute State the BSIC and frequency point number in service cell information table；Search unit, for the BSIC in the service cell information table and Frequency point number is index, and the information of adjacent cells table of matching is searched in the M information of adjacent cells table；Call unit, for calling The frame of the frame number of the initial frame of the first network in the information of adjacent cells table of the matching, the initial frame of second network Number and second network initial frame relative to the skew of the initial frame of the first network, and be recorded as the clothes respectively The frame number of initial frame of the first network in business cell information table, the frame number of the initial frame of second network and described Skew of the initial frame of the second network relative to the initial frame of the first network；Second recording unit, for carrying recorded decoding institute State the BSIC and frequency of M adjacent cell of the Serving cell after the switching that the synchronizing channel and BCCH of the second network are obtained Period；Information of adjacent cells table updating block, for the BSIC and frequency point number of M adjacent cell of the Serving cell after the switching For index, the M information of adjacent cells table is updated.

The information of adjacent cells table updating block is further included：Search matching unit, for the clothes after the switching The BSIC and frequency point number of M adjacent cell of business cell is index, searches for the M information of adjacent cells table；Information of adjacent cells table is more New subelement, for when BSIC and frequency point number are mismatched, then by the BSIC of the adjacent cell of the Serving cell after the switching and Frequency point number is recorded as the BSIC in the information of adjacent cells table and frequency point number, by initial synchronisation moment, the service after the switching Frame of the frame of the adjacent cell of the Serving cell after the frame number of the frame of the adjacent cell of cell, the switching relative to the first network Skew be recorded as the frame number of initial frame of second network in the information of adjacent cells table, second network respectively Initial frame remembers the frame number of the frame of first network described in the initial synchronisation moment relative to the skew of the initial frame of the first network Record the frame number of the initial frame for the first network in the information of adjacent cells table.

In embodiments of the present invention, second updating block 122 includes：First position deviation acquiring unit, for When the second terminal card carries out BSIC confirmations, channel estimation is carried out to the training sequence of synchronizing channel, obtain second net The first position deviation of the frame of network；Second position deviation acquiring unit, for the second terminal clamping receive broadcast channel or During four frame data of person's paging channel, channel estimation is carried out to every frame data, if the broadcast channel of the second network or paging letter Road decoding result is correct, to the broadcast channel or the results averaged of the channel estimation of four frame data of paging channel, Obtain the second position deviation of the frame of second network；First skew updates subelement, for being at least based on described first Deviation or the second position deviation are put, updates described in the service cell information table and M information of adjacent cells table respectively Skew of the initial frame of the second network relative to the initial frame of the first network.

In embodiments of the present invention, the 3rd updating block 123 includes：Frame number updates subelement, for described the When one terminal card synchronizes adjustment, if the frame number of the frame of the first network has adjustment and adjustment amount is after decoding broadcast channel First frame number deviation, then based on the first frame number deviation, in updating the service cell information table and M information of adjacent cells table The first network initial frame frame number；Second skew updates subelement, for synchronizing in the first terminal card During adjustment, if the position of the frame of the first network has adjustment and adjustment amount is the 3rd position deviation, based on described 3rd Put deviation and update the initial frame of the service cell information table and second network in M information of adjacent cells table relative to institute State the skew of the initial frame of first network.

In embodiments of the present invention, the 4th updating block 124 includes：4th position deviation acquiring unit, for During the first terminal card receiving data, channel estimation is carried out to the training sequence of each regular time slots, obtain first net The adjustment amount of the frame position of network is the 4th position deviation；3rd skew updates subelement, for being based on the 4th position deviation, The initial frame of second network in the service cell information table and the M information of adjacent cells table is updated relative to described The skew of the initial frame of first network.

In embodiments of the present invention, the synchronized tracking unit 13 structure as shown in figure 9, including：Extension frame number is counted Unit 131, for the frame number of the frame of the first network to be extended into counting, and is recorded as extending frame number；First determines list Unit 132, for the extension frame number and second based on the extension frame number of the present frame of first network, the initial frame of the first network The frame number of the initial frame of network, determines the frame number of the present frame of the second network；Second determining unit 133, for based on described the The frame number of the present frame of two networks, determines the frame number of the target frame of the second network；3rd determining unit 134, for based on described Extension frame number, the initial frame of second network of the initial frame of first network is relative to the inclined of the initial frame of the first network The frame number with the target frame of the second network is moved, the extension frame number and the mesh of second network of the target frame of first network is determined Skew of the mark frame relative to the target frame of the first network；Frame receiving unit 135, for the synchronization of the first terminal card On the basis of information, the target frame of second network is received；Frame decoding unit 136, for the synchronization of the first terminal card On the basis of information, the target frame of second network is decoded, to keep the synchronized tracking of the second terminal card.

In the embodiment of the present invention, the first determining unit 132 includes：Extension frame number difference computational unit, for calculating first The present frame of network and the extension frame number difference of initial frame；First frame number difference computational unit, for according to first network and The frame length proportionate relationship of two networks and the extension frame number difference, calculate the present frame of the second network and the first frame of initial frame Number difference；Current frame number determining unit, for the frame number based on the first frame number difference and the initial frame of the second network, it is determined that The frame number of the present frame of the second network.Second determining unit 133 includes：Second frame number difference acquiring unit, for obtaining second The target frame of network and the second frame number difference of present frame；Target frame number determining unit, for working as based on second network The frame number of previous frame determines the frame number of the target frame of the second network with the second frame number difference.

In the present embodiment, second network is GSM network, and the second frame number difference acquiring unit includes：First phase To frame number acquiring unit, for obtaining the target frame of second network the corresponding first relative frame number in GSM51 multi-frames；The Two relative frame number computing units, for calculating the present frame of second network the corresponding second relative frame in GSM51 multi-frames Number；Second frame number difference computational unit, for calculating the difference of the described first relative frame number frame number relative with second, to obtain State the second frame number difference.

3rd determining unit 134, for calculating the extension frame number and described second of the target frame of the first network The target frame of network is relative to the skew of the target frame of the first network, and formula is as follows：

T3=T1₁’+floor（（TD_len*12*Delta_GSM_sfn/13+offset_A₁）/TD_len）

offset_B=(TD_len*12*Delta_GSM_sfn/13+offset_A₁)%TD_len

Technical solution of the present invention also provides a kind of mobile terminal including above-mentioned synchronous follow-up device.

It will be understood by those skilled in the art that realizing the whole of mobile terminal and its synchronous follow-up device in above-described embodiment Or part can be by program to instruct the hardware of correlation to complete, described program can be stored in computer-readable storage In medium, the storage medium can be ROM, RAM, magnetic disc, CD etc..

Although the present invention is disclosed as above with preferred embodiment, it is not for limiting the present invention, any this area Technical staff without departing from the spirit and scope of the present invention, may be by the methods and techniques content of the disclosure above to this Bright technical scheme makes possible variation and modification, therefore, every content without departing from technical solution of the present invention, according to the present invention Technical spirit any simple modification, equivalent variations and modification that above example is made, belong to technical solution of the present invention Protection domain.

Claims

1. a kind of method for synchronized of mobile terminal, it is characterised in that the first terminal card in the mobile terminal is resided in First network, second terminal card resides in the second network, and the method for synchronized of the mobile terminal includes：

The cell information table group of the second network is set up, the cell information table group is adjacent little by a service cell information table and M Area's information table composition, wherein M is the number of the adjacent cell of the Serving cell, and in the cell information table group Serving cell is preserved Synchronizing information；

Synchronized result or channel estimation results at least based on the mobile terminal, updates the cell information table group, wherein, institute The synchronization of the synchronous synchronous or described second terminal card including the first terminal card is stated, the channel estimation includes described first The channel estimation of the channel estimation of terminal card or the second terminal card；

Based on the service cell information table of the renewal, the position of the target frame of second network is determined, and with described first The target frame of second network is received, decoded on the basis of the synchronizing information of terminal card, to keep the same of the second terminal card Step tracking.

2. the method for synchronized of mobile terminal according to claim 1, it is characterised in that the cell information table includes The BSIC of the cell of the second network, the frequency point number of the cell of the second network, the frame number of the initial frame of first network, second network The initial frame of the frame number of initial frame and second network relative to the initial frame of the first network skew, wherein, institute The initial frame for stating first network refers to the frame of the first network that first terminal card described in the initial synchronisation moment is located, second net The initial frame of network refers to the frame of the second network that second terminal card described in the initial synchronisation moment is located, and the initial synchronisation moment is The second terminal card is synchronized to the moment of the base station of second network on the basis of the synchronizing information of the first terminal card.

3. the method for synchronized of mobile terminal according to claim 1, it is characterised in that it is described based on described second eventually The synchronized result of end card, updates the cell information table group, including：

Initial synchronisation result based on the second terminal card is stuck in the synchronous knot after cell switching based on the second terminal Really, the cell information table group is updated.

4. the method for synchronized of mobile terminal according to claim 3, it is characterised in that it is described based on described second eventually The initial synchronisation result of end card, updates the cell information table group, including：

By the initial synchronisation moment, Serving cell and M that the synchronizing channel and BCCH of second network are obtained are decoded The BSIC and frequency point number of individual adjacent cell be recorded as the BSIC in the service cell information table and the M information of adjacent cells table and Frequency point number；

By the initial synchronisation moment, the frame number of the frame of the first network be recorded as the service cell information table and it is described M it is adjacent The frame number of the initial frame of the first network in cell information table；

By the initial synchronisation moment, the frame number of the frame of the Serving cell of second network, the Serving cell of second network Frame is recorded as respectively second network in the service cell information table relative to the skew of the frame of the first network The frame number of initial frame, second network initial frame relative to the initial frame of the first network skew；

By initial synchronisation moment, the frame number of the frame of the adjacent cell of the Serving cell of second network, the clothes of second network The frame of the adjacent cell of business cell is recorded as respectively in the information of adjacent cells table relative to the skew of the frame of the first network The frame number of the initial frame of second network, the initial frame of second network are relative to the inclined of the initial frame of the first network Move.

5. the method for synchronized of mobile terminal according to claim 3, it is characterised in that it is described based on described second eventually End is stuck in the synchronized result after cell switching, updates the cell information table group, including：

After second terminal card cell switching, the synchronizing channel and BCCH that decode second network are obtained Serving cell BSIC and the frequency point number BSIC and frequency point number that are recorded as in the service cell information table；

With the BSIC and frequency point number in the service cell information table as index, the search in the M information of adjacent cells table The information of adjacent cells table matched somebody with somebody；

Call the frame number of the initial frame of the first network in the information of adjacent cells table of the matching, second network just The initial frame of the frame number of beginning frame and second network and is recorded respectively relative to the skew of the initial frame of the first network For the frame number of the initial frame of the first network in the service cell information table, the frame number of the initial frame of second network And the initial frame of second network is relative to the skew of the initial frame of the first network；

M of Serving cell after the switching that the synchronizing channel and BCCH of the second network described in carrying recorded decoding is obtained is adjacent The BSIC and frequency point number of cell；

With the BSIC and frequency point number of M adjacent cell of the Serving cell after the switching as index, to the M information of adjacent cells Table is updated.

6. the method for synchronized of mobile terminal according to claim 5, it is characterised in that it is described with the switching after The BSIC and frequency point number of M adjacent cell of Serving cell is index, and the M information of adjacent cells table is updated, including：

With the BSIC and frequency point number of M adjacent cell of the Serving cell after the switching as index, the M adjacent cell letter is searched for Breath table；

When BSIC and frequency point number are mismatched, then the BSIC and frequency point number of the adjacent cell of the Serving cell after the switching are recorded as BSIC and frequency point number in the information of adjacent cells table, by initial synchronisation moment, the adjacent cell of the Serving cell after the switching Frame frame number, the switching after the frame of adjacent cell of Serving cell remember respectively relative to the skew of the frame of the first network The frame number of the initial frame of second network in recording as the information of adjacent cells table, the initial frame of second network relative to The skew of the initial frame of the first network, is recorded as the neighbour little by the frame number of the frame of first network described in the initial synchronisation moment The frame number of the initial frame of the first network in area's information table.

7. the method for synchronized of mobile terminal according to claim 1, it is characterised in that it is described based on described second eventually The channel estimation results of end card, update the cell information table group, including：

When the second terminal card carries out BSIC confirmations, channel estimation is carried out to the training sequence of synchronizing channel, obtain described The first position deviation of the frame of the second network；

When four frame data of broadcast channel or paging channel are received in the second terminal clamping, channel is carried out to every frame data and is estimated Meter, if the broadcast channel or paging channel decoding result are correct, to the broadcast channel or four frame numbers of paging channel According to channel estimation results averaged, obtain the second position deviation of the frame of second network；

At least based on the first position deviation or the second position deviation, the service cell information table and M are updated respectively Skew of the initial frame of second network in individual information of adjacent cells table relative to the initial frame of the first network.

8. the method for synchronized of mobile terminal according to claim 1, it is characterised in that it is described based on described first eventually The synchronized result of end card, updates the cell information table group, including：

When the first terminal card carries out synchronization control, if the frame number of the frame of the first network has tune after decoding broadcast channel Whole and adjustment amount is the first frame number deviation, then based on the first frame number deviation, update the service cell information table and M adjacent The frame number of the initial frame of the first network in cell information table；

When the first terminal card carries out synchronization control, if the position of the frame of the first network has adjustment and adjustment amount is the Three position deviations, then updated in the service cell information table and M information of adjacent cells table based on the 3rd position deviation Skew of the initial frame of second network relative to the initial frame of the first network.

9. the method for synchronized of mobile terminal according to claim 1, it is characterised in that it is described based on described first eventually The channel estimation results of end card, update the cell information table group, including：

In the first terminal card receiving data, channel estimation is carried out to the training sequence of each regular time slots, obtain described The adjustment amount of the position of the frame of first network is the 4th position deviation；

Based on the 4th position deviation, update described in the service cell information table and the M information of adjacent cells table Skew of the initial frame of the second network relative to the initial frame of the first network.

10. the method for synchronized of mobile terminal according to claim 1, it is characterised in that described based on the renewal Service cell information table, determine the position of the target frame of second network, and with the synchronizing information of the first terminal card On the basis of receive, decode the target frame of second network, to keep the synchronized tracking of the second terminal card, including：

Counting is extended to the frame number of the frame of the first network, and is recorded as extending frame number, the counting of the extension frame number Frequency is consistent with the count frequency of frame number, and the scope of the extension frame number is N times of scope of frame number, N more than or equal to 2, and When the first network switches, the extension frame number will be counted again；

Based on the extension frame number of the present frame of first network, the extension frame number of the initial frame of the first network and second net The frame number of the initial frame of network, determines the frame number of the present frame of the second network；

Based on the first network initial frame extension frame number, second network initial frame relative to the first network Initial frame skew and the second network target frame frame number, determine the extension frame number of the target frame of first network and described Skew of the target frame of the second network relative to the target frame of the first network；

On the basis of the synchronizing information of the first terminal card, the target frame of second network is decoded, to keep described second The synchronized tracking of terminal card.

The method for synchronized of 11. mobile terminals according to claim 10, it is characterised in that described based on first network Present frame extension frame number and the first network initial frame extension frame number, determine the frame of the present frame of the second network Number, including：

According to first network and the frame length proportionate relationship and the extension frame number difference of the second network, working as the second network is calculated First frame number difference of previous frame and initial frame；

Based on the first frame number difference and the frame number of the initial frame of the second network, the frame number of the present frame of the second network is determined.

The method for synchronized of 12. mobile terminals according to claim 10, it is characterised in that described based on described second The frame number of the present frame of network, determining the frame number of the target frame of the second network includes：

The frame of the target frame of the second network is determined with the second frame number difference based on the frame number of the present frame of second network Number.

The method for synchronized of 13. mobile terminals according to claim 12, it is characterised in that second network is GSM network, the target frame of the network of the acquisition second comprises the steps with the second frame number difference of present frame：

The method for synchronized of 14. mobile terminals according to claim 10, it is characterised in that the mesh of the first network The extension frame number of mark frame and the target frame of second network are public relative to the calculating of the skew of the target frame of the first network Formula is as follows：

T3=T1₁’+floor((TD_len*12*Delta_GSM_sfn/13+offset_A₁)/TD_len)

Offset_B=(TD_len*12*Delta_GSM_sfn/13+offset_A₁) %TD_len

Wherein, T3 is the extension frame number of the target frame of the first network, T1₁' be the first network initial frame extension frame Number, TD_len is the frame length of the first network frame, Delta_GSM_sfn be the frame number of the target frame of second network with it is first The difference of the frame number of beginning frame, offset_A₁For second network initial frame relative to the initial frame of the first network Skew, offset_B is the skew of the target frame relative to the target frame of the first network of second network, and floor is to take Whole computing, % is to take the remainder computing.

15. a kind of synchronous follow-up devices of mobile terminal, it is characterised in that the first terminal card in the mobile terminal is resided in First network, second terminal card resides in the second network, and the synchronous follow-up device of the mobile terminal includes：

Memory element, for storing the cell information table group of the second network, the cell information table group is believed by a Serving cell Breath table and M information of adjacent cells table composition, wherein M is the number of the adjacent cell of the Serving cell, the cell information table group The middle synchronizing information for preserving Serving cell；

Updating block, for being at least based on the synchronized result or channel estimation results of the mobile terminal, updates the cell letter Breath table group, wherein, the synchronization includes the synchronization of the synchronous or described second terminal card of the first terminal card, and the channel is estimated Meter includes the channel estimation of the first terminal card or the channel estimation of the second terminal card；

Synchronized tracking unit, for the service cell information table based on the renewal, determines the target frame of second network Position, and the target frame of second network is received, decoded on the basis of the synchronizing information of the first terminal card, to keep State the synchronized tracking of second terminal card.

The synchronous follow-up device of 16. mobile terminals according to claim 15, it is characterised in that the cell information table bag Include BSIC, the frequency point number of the cell of the second network, the frame number of the initial frame of first network, second network of the cell of the second network The frame number of initial frame and the initial frame of second network relative to the initial frame of the first network skew, wherein, The initial frame of the first network refers to the frame of the first network that first terminal card described in the initial synchronisation moment is located, described second The initial frame of network refers to the frame of the second network that second terminal card described in the initial synchronisation moment is located, the initial synchronisation moment Be base station that the second terminal card is synchronized to second network on the basis of the synchronizing information of the first terminal card when Carve.

The synchronous follow-up device of 17. mobile terminals according to claim 15, it is characterised in that the updating block is at least Including following any cell：

First updating block, is stuck in little for the initial synchronisation result based on the second terminal card or based on the second terminal Synchronized result after area's switching, updates the cell information table group；

The synchronous follow-up device of 18. mobile terminals according to claim 17, it is characterised in that first updating block At least include following any cell：

First updates subelement, for the initial synchronisation result based on the second terminal card, updates the cell information table group；

Second updates subelement, for being stuck in the synchronized result after cell switching based on the second terminal, updates the cell Information table group.

The synchronous follow-up device of 19. mobile terminals according to claim 18, it is characterised in that described first updates son list Unit, including：

First acquisition unit, what the synchronizing channel and broadcast channel for the initial synchronisation moment to be decoded second network was obtained The BSIC and frequency point number of the Serving cell and the M adjacent cell is recorded as BSIC and frequency in the service cell information table Period；

Second acquisition unit, for the frame number of the frame of first network described in the initial synchronisation moment to be recorded as into the Serving cell letter The frame number of the initial frame of the first network in breath table；

3rd acquiring unit, for by the frame number of the frame of the Serving cell of the second network described in the initial synchronisation moment, described second The frame of the Serving cell of network relative to the skew of the frame of the first network, during the service cell information table is recorded as respectively Second network initial frame frame number, the initial frame of second network relative to the initial frame of the first network Skew；

4th acquiring unit, for by the frame number of the frame of the adjacent cell of the Serving cell of the second network described in the initial synchronisation moment, The frame of the adjacent cell of the Serving cell of second network is recorded as respectively institute relative to the side-play amount of the frame of the first network The frame number of the initial frame of second network in information of adjacent cells table and the initial frame of second network are stated relative to institute State the skew of the initial frame of first network.

The synchronous follow-up device of 20. mobile terminals according to claim 18, it is characterised in that described second updates son list Unit, including：

First recording unit, for after second terminal card cell switching, the synchronizing channel of second network will to be decoded The BSIC and frequency point number of the Serving cell obtained with BCCH be recorded as the BSIC in the service cell information table and Frequency point number；

Search unit, for the BSIC and frequency point number in the service cell information table as index, in M adjacent cell letter The information of adjacent cells table of matching is searched in breath table；

Call unit, for frame number, the institute of the initial frame of the first network in the information of adjacent cells table for calling the matching The frame number of the initial frame of the second network and the initial frame of second network are stated relative to the initial frame of the first network Skew, and the frame number of the initial frame of the first network being recorded as respectively in the service cell information table, second net Skew of the initial frame of the frame number of the initial frame of network and second network relative to the initial frame of the first network；

Second recording unit, after the switching that obtains of synchronizing channel and BCCH of the second network described in carrying recorded decoding Serving cell M adjacent cell BSIC and frequency point number；

Information of adjacent cells table updating block, for the BSIC and frequency point number of M adjacent cell of the Serving cell after the switching For index, the M information of adjacent cells table is updated.

The synchronous follow-up device of 21. mobile terminals according to claim 20, it is characterised in that the information of adjacent cells table Updating block includes：

Search matching unit, for the BSIC and frequency point number of M adjacent cell of the Serving cell after the switching as index, searching Suo Suoshu M information of adjacent cells tables；

Information of adjacent cells table updates subelement, for when BSIC and frequency point number are mismatched, then the service after the switching is little The BSIC and frequency point number of the adjacent cell in area is recorded as the BSIC in the information of adjacent cells table and frequency point number, during by initial synchronisation Carve, the frame phase of the adjacent cell of the Serving cell after the frame number of the frame of the adjacent cell of the Serving cell after the switching, the switching The initial frame of second network skew of the frame of the first network being recorded as respectively in the information of adjacent cells table Frame number, second network initial frame relative to the initial frame of the first network skew, by initial synchronisation moment institute State the frame of first network frame number be recorded as the first network in the information of adjacent cells table initial frame frame number.

The synchronous follow-up device of 22. mobile terminals according to claim 17, it is characterised in that described second updates single Unit, including：

First position deviation acquiring unit, for the second terminal card carry out BSIC confirm when, the training to synchronizing channel Sequence carries out channel estimation, obtains the first position deviation of the frame of second network；

Second position deviation acquiring unit, for receiving four frame numbers of broadcast channel or paging channel in the second terminal clamping According to when, channel estimation is carried out to every frame data, if the broadcast channel of the second network or paging channel decoding result are correct, to institute The results averaged of the channel estimation of four frame data of broadcast channel or paging channel is stated, the frame of second network is obtained Second position deviation；

First skew updates subelement, for being at least based on the first position deviation or the second position deviation, respectively more The initial frame of second network in new the service cell information table and M information of adjacent cells table is relative to first net The skew of the initial frame of network.

The synchronous follow-up device of 23. mobile terminals according to claim 17, it is characterised in that the 3rd updating block Including：

Frame number updates subelement, for when the first terminal card carries out synchronization control, if described the after decoding broadcast channel The frame number of the frame of one network has adjustment and adjustment amount is the first frame number deviation, then based on the first frame number deviation, update described The frame number of the initial frame of the first network in service cell information table and M information of adjacent cells table；

Second skew updates subelement, for when the first terminal card carries out synchronization control, if the frame of the first network Position have adjustment and adjustment amount is the 3rd position deviation, then the service cell information is updated based on the 3rd position deviation Skew of the initial frame of second network in table and M information of adjacent cells table relative to the initial frame of the first network.

The synchronous follow-up device of 24. mobile terminals according to claim 17, it is characterised in that the described 4th updates single Unit, including：

4th position deviation acquiring unit, in the first terminal card receiving data, the training to each regular time slots Sequence carries out channel estimation, and the adjustment amount for obtaining the frame position of the first network is the 4th position deviation；

3rd skew updates subelement, for based on the 4th position deviation, updating the service cell information table and the M Skew of the initial frame of second network in individual information of adjacent cells table relative to the initial frame of the first network.

The synchronous follow-up device of 25. mobile terminals according to claim 15, it is characterised in that the synchronized tracking list Unit, including：

Extension frame number counting unit, for being extended the frame number of the frame of the first network counting, and is recorded as extending frame Number, the scope of the extension frame number is N times of the scope of frame number, the count frequency of the extension frame number and the count frequency of frame number Unanimously, N is more than or equal to 2, and when the first network switches, the extension frame number will be counted again；

First determining unit, for the expansion based on the extension frame number of the present frame of first network, the initial frame of the first network The frame number of the initial frame of exhibition frame number and the second network, determines the frame number of the present frame of the second network；

Second determining unit, for the frame number based on the present frame of second network, determines the frame of the target frame of the second network Number；

3rd determining unit, for the initial frame based on the extension frame number of the initial frame of the first network, second network Relative to the frame number of the target frame of the skew and the second network of the initial frame of the first network, the target frame of first network is determined Extension frame number and second network target frame relative to the target frame of the first network skew；

Frame receiving unit, on the basis of the synchronizing information of the first terminal card, receiving the target frame of second network；

Frame decoding unit, on the basis of the synchronizing information of the first terminal card, decoding the target frame of second network, To keep the synchronized tracking of the second terminal card.

The synchronous follow-up device of 26. mobile terminals according to claim 25, it is characterised in that first determining unit Including：

Extension frame number difference computational unit, for calculating the present frame of first network and the extension frame number difference of initial frame；

First frame number difference computational unit, for according to the frame length proportionate relationship of first network and the second network and the extension Frame number difference, calculates the present frame of the second network and the first frame number difference of initial frame；Current frame number determining unit, for being based on The frame number of the initial frame of the first frame number difference and the second network, determines the frame number of the present frame of the second network.

The synchronous follow-up device of 27. mobile terminals according to claim 25, it is characterised in that second determining unit Including：

Second frame number difference acquiring unit, for obtaining the target frame of the second network and the second frame number difference of present frame；

Target frame number determining unit, the frame number for the present frame based on second network determines with the second frame number difference The frame number of the target frame of the second network.

The synchronous follow-up device of 28. mobile terminals according to claim 27, it is characterised in that second network is GSM network, the second frame number difference acquiring unit includes：

First relative frame number acquiring unit, for obtaining the target frame of second network corresponding first in GSM51 multi-frames With respect to frame number；

Second relative frame number computing unit, for calculating the present frame of second network corresponding second in GSM51 multi-frames With respect to frame number；

Second frame number difference computational unit, for calculating the difference of the described first relative frame number frame number relative with second, to obtain The second frame number difference.

The synchronous follow-up device of 29. mobile terminals according to claim 25, it is characterised in that the described 3rd determines list Unit, for calculating the extension frame number of the target frame of the first network and the target frame of second network relative to described first The skew of the target frame of network, formula is as follows：

T3=T1₁’+floor((TD_len*12*Delta_GSM_sfn/13+offset_A₁)/TD_len)

Offset_B=(TD_len*12*Delta_GSM_sfn/13+offset_A₁) %TD_len

30. a kind of mobile terminals, it is characterised in that include：Synchronous follow-up device described in any one of claim 15 to 29.