CN103796341A - Mobile terminal, mobile-terminal frame position determining method and device, and mobile-terminal frame reception method - Google Patents
Mobile terminal, mobile-terminal frame position determining method and device, and mobile-terminal frame reception method Download PDFInfo
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Abstract
The invention provides a mobile terminal, a mobile-terminal frame position determining method and device, and a mobile-terminal frame reception method. The frame position determining method comprises the steps of recording the expanded number of an initial frame of a first network, the number of an initial frame of a second network, and the deviation of the initial frame of the second network relative to the initial frame of the first network; determining the number of a present frame of the second network and the number of an object frame of the second network; and determining the expanded number of an object frame of the first network, and the deviation of the object frame of the second network relative to the object frame of the first network. According to the technical scheme of the invention, the problem of positioning the reception position of the object frame of the second network under the condition that a second terminal card is synchronous with a first terminal card can be solved, and due to introduction of the expanded frame numbers, the positioning process is more rapid, and the efficiency of the mobile terminal is improved.
Description
Technical field
The present invention relates to mobile communication technology field, particularly a kind of mobile terminal and frame position thereof are determined method and apparatus and frame method of reseptance.
Background technology
No.3 generation mobile communication system is with its more efficient spectrum efficiency, and higher service quality and security performance and higher service rate, obtaining more and more users' concern and use.But the network coverage face of second generation mobile communcations system is wider, communication effect is stable, still has its unique advantage.Therefore, one can be supported No.3 generation mobile communication system, can support again the multi-mold multi-card multi-standby mobile terminal of second generation mobile communcations system to arise at the historic moment.Take existing a kind of dual-mode dual-card dual-standby mobile terminal as example, it is mainly to support TD SDMA (TD-SCDMA, Time Division-SynchronousCode Division Multiple Access) and global system for mobile communications (GSM, Global System forMobile Communications) mobile terminal of two kinds of networks, in a mobile terminal, can put into a TD-SCDMA terminal card and a GSM terminal card simultaneously, and standby simultaneously in TD-CDMA network and GSM network respectively.
In single base band injection frequency implementation, when TD-SCDMA terminal card standby wherein or when carrying out business, GSM terminal card keeps synchronizeing with TD-SCDMA terminal card, to receive in real time Broadcast Control Channel (BCCH, Broadcast Control Channel) or paging channel (PCH, Paging Channel) etc. information, therefore only have the position of locating accurately BCCH or PCH, the normal use of guarantee GSM terminal card.But existing technology has only solved the problem of two card initial synchronisation, do not consider synchronous after, in the time of a terminal card standby wherein, the how problem of the receiving position of the target frame of another terminal card described in Obtaining Accurate.The patent that is for example US2010222064A1 with reference to U.S. Patent Publication No., a kind of TD-SCDMA/GSM dual-mode dual-card dual-standby mobile phone is disclosed, at GSM terminal card under holding state, the problem of the initial synchronisation of TD-SCDMA terminal card and GSM terminal card, but still do not solve the problems of the technologies described above.
Summary of the invention
The problem that technical solution of the present invention will solve is that, in multi-card mobile terminal, in the time of described first terminal card standby, how described the second terminal card obtains the receiving position of the target frame of described second network accurately.
For addressing the above problem, technical solution of the present invention provides a kind of frame position of mobile terminal to determine method, comprising:
Be recorded in first terminal card and the second terminal card when synchronous described in the frame number of initial frame of second network at expansion frame number, described the second terminal card place of initial frame of first network at first terminal card place and the initial frame of described second network with respect to the skew of the initial frame of described first network, the scope of described expansion frame number be frame number scope N doubly, the count frequency of described expansion frame number is consistent with frame number count frequency, and N is more than or equal to 2;
The frame number of the expansion frame number of the initial frame of the expansion frame number of the present frame based on first network, described first network and the initial frame of second network, determines the frame number of the present frame of second network;
The frame number of the present frame based on described second network, determines the frame number of the target frame of second network;
The initial frame of the expansion frame number of the initial frame based on described first network, described second network is with respect to the frame number of the skew of the initial frame of described first network and the target frame of second network, determines the skew with respect to the target frame of described first network of the expansion frame number of target frame of first network and the target frame of described second network.
Optionally, in the time that mobile terminal generation network switches, described expansion frame number is counted again.
Optionally, the expansion frame number of the expansion frame number of the described present frame based on first network and the initial frame of described first network, determine that the frame number of the present frame of second network comprises:
Calculate the present frame of first network and the expansion frame number difference of initial frame;
According to the frame length proportionate relationship of first network and second network and described expansion frame number difference, calculate the present frame of second network and the first frame number difference of initial frame;
The frame number of the initial frame based on described the first frame number difference and second network, determines the frame number of the present frame of second network.
Optionally, the frame number of the described present frame based on described second network, determine that the frame number of the target frame of second network comprises:
Obtain the target frame of second network and the second frame number difference of present frame;
The frame number of the present frame based on described second network and described the second frame number difference are determined the frame number of the target frame of second network.
Optionally, described second network is GSM network, described in obtain described second network target frame and present frame the second frame number difference comprise the steps:
The target frame of obtaining described second network in GSM51 multi-frame corresponding first-phase to frame number;
The present frame that calculates described second network in GSM51 multi-frame corresponding second-phase to frame number;
Calculate described first-phase to frame number and second-phase the difference to frame number, to obtain described the second frame number difference.
Optionally, the expansion frame number of the target frame of described first network and the target frame of described second network are as follows with respect to the computing formula of the skew of the target frame of described first network:
T3=T1+floor（（TD_len*12*Delta_GSM_sfn/13+offset_A）/TD_len）
offset_B=(TD_len*12*Delta_GSM_sfn/13+offset_A)%TD_len
Wherein, T3 is the expansion frame number of the target frame of described first network, T1 is the expansion frame number of the initial frame of described first network, TD_len is the frame length of described first network frame, Delta_GSM_sfn is the difference of the frame number of target frame and the frame number of initial frame of described second network, offset_A is that the initial frame of described second network is with respect to the skew of the initial frame of described first network, offset_B is that the target frame of described second network is with respect to the skew of the target frame of described first network, floor is rounding operation, and % is for getting remainder operation.
Technical solution of the present invention also provides a kind of frame method of reseptance of mobile terminal, comprising:
The frame position of above-mentioned mobile terminal is determined method;
The expansion frame number of the target frame based on described first network and the target frame of described second network, with respect to the skew of the target frame of described first network, receive the target frame of second network.
For solving the problems of the technologies described above, technical solution of the present invention also provides a kind of frame position determining device of mobile terminal, comprising:
Record cell, for be recorded in described first terminal card and the second terminal card when synchronous described in the frame number of initial frame of second network at expansion frame number, described the second terminal card place of initial frame of first network at first terminal card place and the initial frame of described second network with respect to the skew of the initial frame of described first network, the scope of described expansion frame number be frame number scope N doubly, the count frequency of described expansion frame number is consistent with frame number count frequency, and N is more than or equal to 2;
The first determining unit, for the expansion frame number of initial frame of the expansion frame number of the present frame based on first network, described first network and the frame number of the initial frame of second network, determines the frame number of the present frame of second network;
The second determining unit, for the frame number of the present frame based on described second network, determines the frame number of the target frame of second network;
The 3rd determining unit, frame number for the initial frame of the expansion frame number of initial frame based on described first network, described second network with respect to the skew of the initial frame of described first network and the target frame of second network, determines the skew with respect to the target frame of described first network of the expansion frame number of target frame of first network and the target frame of described second network.
For solving the problems of the technologies described above, technical solution of the present invention also provides a kind of mobile terminal, comprise frame receiving element and above-mentioned frame position determining device, described frame receiving element is the skew with respect to the target frame of described first network for the expansion frame number of target frame based on described first network and the target frame of described second network, receives the target frame of second network.
Compared with prior art, the synchronizing information of technical solution of the present invention based on first network system and second network system, comprise the expansion frame number of the initial frame of first network, the frame number of the initial frame of second network and the initial frame of described second network are with respect to the skew of the initial frame of described first network, determine the skew with respect to the target frame of described first network of the expansion frame number of target frame of first network and the target frame of described second network, solve the problem of the receiving position of the frame of the first terminal card standby second network that how exactly definite the second terminal card will receive in the time of first network.And, utilize the expansion frame number that the count cycle extends to calculate, simplify the definite computation complexity of frame position.
Directly by the frame obtaining from second network, the relative position system-frame is applied in the calculating of determining frame position, has further simplified the flow process of calculating, and has improved the efficiency of calculating, thereby has improved operational performance and the efficiency of mobile terminal.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet that the frame position of the mobile terminal of technical solution of the present invention is determined method;
Fig. 2 is the frame structure schematic diagram of determining second network frame position described in the embodiment of the present invention;
Fig. 3 is the structural representation of GSM51 multi-frame described in the embodiment of the present invention;
Fig. 4 is the schematic flow sheet of the frame method of reseptance of the mobile terminal of technical solution of the present invention;
Fig. 5 is the structural representation of the frame position determining device of the mobile terminal of technical solution of the present invention.
Embodiment
The application of multi-card mobile terminal is more and more extensive at present, but the resident network cell of each card of multi-card mobile terminal is general and asynchronous, in the time of a terminal card standby wherein, other-end card as this terminal card be how benchmark, receive exactly frame data, become the technical barrier that urgently needs at present solution.
In multi-card mobile terminal, when the standby of first terminal card is in the community of first network, the position that accurately locate the frame of the community of the second network that the second terminal card need to receive is the basis that described the second terminal card accurately receives signal, decoded signal.For this problem, inventor has proposed a kind of frame position of mobile terminal and has determined method, as shown in Figure 1, comprising:
Step S1, be recorded in first terminal card and the second terminal card when synchronous described in the frame number of initial frame of second network at expansion frame number, described the second terminal card place of initial frame of first network at first terminal card place and the initial frame of described second network with respect to the skew of the initial frame of described first network;
Step S2, the frame number of the expansion frame number of the initial frame of the expansion frame number of the present frame based on first network, described first network and the initial frame of second network, determines the frame number of the present frame of second network;
Step S3, the frame number of the present frame based on described second network, determines the frame number of the target frame of second network;
Step S4, the initial frame of the expansion frame number of the initial frame based on described first network, described second network is with respect to the frame number of the skew of the initial frame of described first network and the target frame of second network, determines the skew with respect to the target frame of described first network of the expansion frame number of target frame of first network and the target frame of described second network.
Described mobile terminal can be dual-mode dual-card dual-standby or multimode dual-SIM-card dual-standby mobile terminal, and this mobile terminal can adopt single base band injection scheme frequently.Described the second terminal card can be the arbitrary terminal card except described first terminal card in mobile terminal.Described first network can be 2G network, as GSM network, cdma network; Also can be 3G network, as TD-SCDMA network, WCDMA network; It can also be LTE network.Described second network can be 2G network, 3G network or LTE network.
For above-mentioned purpose of the present invention, feature and advantage can more be become apparent, below take first network as TD-SCDMA network, second network is that GSM network is example, by reference to the accompanying drawings technical solution of the present invention is described in detail.
Step S1: be recorded in first terminal card and the second terminal card when synchronous described in the frame number of initial frame of second network at expansion frame number, described the second terminal card place of initial frame of first network at first terminal card place and the initial frame of described second network with respect to the skew of the initial frame of described first network.
In conjunction with the frame structure schematic diagram with reference to the definite second network frame position shown in figure 2, step S1 records the synchronizing information of first network system and second network system, and described synchronizing information comprises: the expansion frame number T1 of the initial frame of TD-SCDMA network, the frame number G1 of initial frame of GSM network and the initial frame of GSM network are with respect to the skew offset_A of the initial frame of described TD-SCDMA network.Described initial frame refers under two Network Synchronization states network frame separately.
Technical solution of the present invention has proposed concept and the related algorithm of expansion frame number, the scope of expansion frame number be frame number scope N doubly, the count frequency of described expansion frame number is consistent with the count frequency of frame number, N is more than or equal to 2, utilize described expansion frame number to carry out the counting of frame number, extend the count cycle of frame number, can reduce the number of times of counting again of frame number, calculated thereby simplify.In mobile terminal, can design an expansion frame number counter, for expansion frame number is counted.N can be according to practical application, the switching cycle of the count cycle of coupling system to frame number and described first network and second network and determining.In the present embodiment, the frame number scope of TD-SCDMA is with hexadecimal representation from 0x0000 to 0x1FFF(), step-length is 2.If directly use the frame number of TD-SCDMA to calculate, every mistake will be upgraded the frame number of TD-SCDMA for 40.96 seconds in algorithm, may occur the phenomenon that the frame number multicycle repeats in calculating, can increase the EMS memory occupation of system and extend the time of calculating.When mobile terminal generation network switches, the System Frame Number of network also will be counted again, can bring equally the adverse effect that increases Installed System Memory and extend computing time.System Frame Number is expanded after calculating, just can be solved the above problems.In the present embodiment, the scope of the expansion frame number after expansion is 0x00000000 ~ 0x3FFFFFFF, and the count cycle of expansion frame number is roughly equivalent to 62 days.Under normal circumstances, within 62 days, the switching to another network of TD-SCDMA network occurs to I haven't seen you for ages, in the time network occurs switching, expansion frame number is counted again, is difficult to the repeat count of the expansion frame number that occurs TD-SCDMA network.
Step S2: the frame number of the expansion frame number of the initial frame of the expansion frame number of the present frame based on first network, described first network and the initial frame of second network, determine the frame number of the present frame of second network.
Particularly, in conjunction with Fig. 2, first calculate the present frame of described TD-SCDMA network and the expansion frame number difference Delta_TD_esfn1 of initial frame, i.e. Delta_TD_esfn1=T2-T1, the expansion frame number (expanding the current count value of frame number counter) of the present frame that wherein T2 is first network; Then according to the proportionate relationship of the frame length GSM_len of the frame length TD_len of TD-SCDMA network and GSM network, be 12*TD_len=13*GSM_len, can obtain the first frame number difference Delta_GSM_sfn1 of second network present frame and initial frame, be Delta_GSM_sfn1=ceil (Delta_TD_esfn1*12/13), wherein ceil is the computing that rounds up; Then, the frame number G1 of the initial frame based on described the first frame number difference Delta_GSM_sfn1 and GSM network just can obtain the frame number G2 of the present frame of GSM network, i.e. G2=G1+Delta_GSM_sfn1.
Step S3: the frame number of the present frame based on described second network, determine the frame number of the target frame of second network.What mobile terminal from GSM network system was obtained is the relative frame number in GSM51 multi-frame, determine the frame number of the target frame of second network, also needs to know the frame number of the GSM51 multi-frame after synchronous, calculates more complicated.And in the present embodiment, directly utilize frame from the GSM Network Capture relative frame number GSM51 multi-frame to calculate the second frame number difference, and then calculate the frame number of the target frame of described second network, further simplify the flow process of calculating, improve the efficiency of calculating.
Particularly, step S3 comprises: obtain the target frame of second network and the second frame number difference of present frame; Frame number based on described second network present frame and described the second frame number difference are determined the frame number of the target frame of second network.The target frame of described second network is the frame that described the second terminal card will receive.Wherein, described in, obtain the target frame of second network and the second frame number difference of present frame comprises: the target frame of obtaining described second network in GSM51 multi-frame corresponding first-phase to frame number; The present frame that calculates described second network in GSM51 multi-frame corresponding second-phase to frame number; Calculate described first-phase to frame number and second-phase the difference to frame number, to obtain described the second frame number difference.
As shown in Figure 3, in figure, F represents FCCH frame to the structure of GSM51 multi-frame, and every lattice represent 1 frame; S represents SCH frame, and every lattice represent 1 frame; B represents BCCH frame, and every lattice represent 4 frames; C represents CCCH frame, and every lattice represent 4 frames, and CCCH can carry PCH and expansion BCCH; I represents Idle frame, and every lattice represent 1 frame.Take the target frame of second network as BCCH frame is as example, in conjunction with referring to figs. 2 and 3, by the frame number G2 of the present frame of described second network divided by 51 remainder numbers, the present frame that just can obtain described second network at the described second-phase of GSM51 multi-frame to frame number, if described first-phase is greater than second-phase to frame number to frame number, described the second frame number difference Delta_GSM_sfn2 just equals described first-phase frame number is deducted to second-phase to frame number, if described first-phase is less than second-phase to frame number to frame number, described the second frame number difference Delta_GSM_sfn2 just equals described first-phase and frame number is added to 51 deducts described second-phase to frame number again.Suppose to need the BCCH framing bit receiving in the 5th C frame, the frame number of the present frame of second network is 120, and so described first-phase is just 27 to frame number, and described second-phase is just 18 to frame number, and described the second frame number difference Delta_GSM_sfn2 is just 9.The frame number G3=G2+Delta_GSM_sfn2 of the target frame of described second network.The calculating of the frame number of the present frame of second network described in integrating step 2, can obtain G3=G1+Delta_GSM_sfn1+Delta_GSM_sfn2, the frame number difference Delta_GSM_sfn=Delta_GSM_sfn1+Delta_GSM_sfn2 between target frame and the initial frame of described second network.
Step S4: the initial frame of the expansion frame number of the initial frame based on described first network, described second network is with respect to the frame number of the skew of the initial frame of described first network and the target frame of second network, determines the skew with respect to the target frame of described first network of the expansion frame number of target frame of first network and the target frame of described second network.
Concrete, the frame number T3 of the target frame of described first network determines according to following formula:
T3=T1+floor（（TD_len*12*Delta_GSM_sfn/13+offset_A）/TD_len）
Wherein, floor is rounding operation.
The target frame of described second network is determined according to following formula with respect to the skew offset_B of the target frame of first network:
offset_B=(TD_len*12*Delta_GSM_sfn/13+offset_A)%TD_len
Wherein, % is remainder operation.
It should be noted that 1/8th chip lengths that in the present embodiment, step S1 is TD-SCDMA to the unit of offset_A, the offset_B, TD_len and the GSM_len that relate in S4.
The frame position of the mobile terminal based on above-mentioned is determined method, and the frame method of reseptance of the mobile terminal of technical solution of the present invention as shown in Figure 4, comprising:
Step S11, be recorded in first terminal card and the second terminal card when synchronous described in the frame number of initial frame of second network at expansion frame number, described the second terminal card place of initial frame of first network at first terminal card place and the initial frame of described second network with respect to the skew of the initial frame of described first network;
Step S12, the frame number of the expansion frame number of the initial frame of the expansion frame number of the present frame based on first network, described first network and the initial frame of second network, determines the frame number of the present frame of second network;
Step S13, the frame number of the present frame based on described second network, determines the frame number of the target frame of second network;
Step S14, the initial frame of the expansion frame number of the initial frame based on described first network, described second network is with respect to the frame number of the skew of the initial frame of described first network and the target frame of second network, determines the skew with respect to the target frame of described first network of the expansion frame number of target frame of first network and the target frame of described second network.
Step S15, the expansion frame number of the target frame based on described first network and the target frame of described second network, with respect to the skew of the target frame of described first network, receive the target frame of second network.
In the present embodiment, step S15 can be specifically: the expansion frame number of the target frame based on described first network, can obtain the frame number of the target frame of described first network, skew in conjunction with the target frame of described second network with respect to the target frame of described first network, the receiving position of the target frame that just can obtain second network in described first network.Then, the second terminal card just can receive described second network target frame accurately, and then the target frame of described second network is decoded, and guarantees described the second terminal card persistent district or carries out business.
Frame position based on above-mentioned mobile terminal is determined method, the frame position determining device of technical solution of the present invention as shown in Figure 5, described frame position determining device 1 comprises: record cell 11, for be recorded in described first terminal card and the second terminal card when synchronous described in the frame number of initial frame of second network at expansion frame number, described the second terminal card place of initial frame of first network at first terminal card place and the initial frame of described second network with respect to the skew of the initial frame of described first network; The first determining unit 12, for the expansion frame number of initial frame of the expansion frame number of the present frame based on first network, described first network and the frame number of the initial frame of second network, determines the frame number of the present frame of second network; The second determining unit 13, for the frame number of the present frame based on described second network, determines the frame number of the target frame of second network; The 3rd determining unit 14, frame number for the initial frame of the expansion frame number of initial frame based on described first network, described second network with respect to the skew of the initial frame of described first network and the target frame of second network, determines the skew with respect to the target frame of described first network of the expansion frame number of target frame of first network and the target frame of described second network.
In embodiments of the present invention, described the first determining unit 12 comprises: expansion frame number difference computational unit (not shown in Fig. 5), for calculating the expansion frame number difference of present frame and initial frame of first network; The first frame number difference computational unit (not shown in Fig. 5), for according to the frame length proportionate relationship of first network and second network and described expansion frame number difference, calculates the present frame of second network and the first frame number difference of initial frame; Current frame number determining unit (not shown in Fig. 5), for the frame number of the initial frame based on described the first frame number difference and second network, determines the frame number of the present frame of second network.
Described the second determining unit 13 comprises: the second frame number difference acquiring unit (not shown in Fig. 5), for obtaining the target frame of second network and the second frame number difference of present frame; Target frame number determining unit (not shown in Fig. 5), determines the frame number of the target frame of second network for the frame number of the present frame based on described second network and described the second frame number difference.
Described second network is GSM network, and described the second frame number difference acquiring unit comprises: first-phase is to frame number acquiring unit (not shown in Fig. 5), for the target frame of obtaining described second network at first-phase corresponding to GSM51 multi-frame to frame number; Second-phase is to frame number computing unit (not shown in Fig. 5), for the present frame that calculates described second network at second-phase corresponding to GSM51 multi-frame to frame number; The second frame number difference computational unit (not shown in Fig. 5), for calculate described first-phase to frame number and second-phase the difference to frame number, to obtain described the second frame number difference.
Described the 3rd determining unit 14, for calculating the skew with respect to the target frame of described first network of the expansion frame number of target frame of described first network and the target frame of described second network, formula is as follows:
T3=T1+floor（（TD_len*12*Delta_GSM_sfn/13+offset_A）/TD_len）
offset_B=(TD_len*12*Delta_GSM_sfn/13+offset_A)%TD_len
Wherein, T3 is the expansion frame number of the target frame of described first network, T1 is the expansion frame number of the initial frame of described first network, TD_len is the frame length of described first network frame, Delta_GSM_sfn is the difference of the frame number of target frame and the frame number of initial frame of described second network, offset_A is that the initial frame of described second network is with respect to the skew of the initial frame of described first network, offset_B is that the target frame of described second network is with respect to the skew of the target frame of described first network, floor is rounding operation, and % is for getting remainder operation.
The course of work of the frame position determining device of technical solution of the present invention can be determined with reference to the frame position of the invention described above technical scheme the explanation of method, does not repeat them here.
The mobile terminal of technical solution of the present invention comprises above-mentioned frame position determining device and frame receiving element, described frame receiving element is the skew with respect to the target frame of described first network for the expansion frame number of target frame based on described first network and the target frame of described second network, receives the target frame of second network.
Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can utilize method and the technology contents of above-mentioned announcement to make possible variation and modification to technical solution of the present invention; therefore; every content that does not depart from technical solution of the present invention; any simple modification, equivalent variations and the modification above embodiment done according to technical spirit of the present invention, all belong to the protection range of technical solution of the present invention.
Claims (14)
1. the frame position of mobile terminal is determined a method, it is characterized in that, comprising:
Be recorded in first terminal card and the second terminal card when synchronous described in the frame number of initial frame of second network at expansion frame number, described the second terminal card place of initial frame of first network at first terminal card place and the initial frame of described second network with respect to the skew of the initial frame of described first network, the scope of described expansion frame number be frame number scope N doubly, the count frequency of described expansion frame number is consistent with the count frequency of frame number, and N is more than or equal to 2;
The frame number of the expansion frame number of the initial frame of the expansion frame number of the present frame based on first network, described first network and the initial frame of second network, determines the frame number of the present frame of second network;
The frame number of the present frame based on described second network, determines the frame number of the target frame of second network;
The initial frame of the expansion frame number of the initial frame based on described first network, described second network is with respect to the frame number of the skew of the initial frame of described first network and the target frame of second network, determines the skew with respect to the target frame of described first network of the expansion frame number of target frame of first network and the target frame of described second network.
2. the frame position of mobile terminal according to claim 1 is determined method, it is characterized in that, in the time that mobile terminal generation network switches, described expansion frame number is counted again.
3. the frame position of mobile terminal according to claim 1 is determined method, it is characterized in that, the expansion frame number of the expansion frame number of the described present frame based on first network and the initial frame of described first network determines that the frame number of the present frame of second network comprises:
Calculate the present frame of first network and the expansion frame number difference of initial frame;
According to the frame length proportionate relationship of first network and second network and described expansion frame number difference, calculate the present frame of second network and the first frame number difference of initial frame;
The frame number of the initial frame based on described the first frame number difference and second network, determines the frame number of the present frame of second network.
4. the frame position of mobile terminal according to claim 1 is determined method, it is characterized in that, the frame number of the described present frame based on described second network determines that the frame number of the target frame of second network comprises:
Obtain the target frame of second network and the second frame number difference of present frame;
The frame number of the present frame based on described second network and described the second frame number difference are determined the frame number of the target frame of second network.
5. the frame position of mobile terminal according to claim 4 is determined method, it is characterized in that, described second network is GSM network, described in obtain the target frame of second network and the second frame number difference of present frame comprises the steps:
The target frame of obtaining described second network in GSM51 multi-frame corresponding first-phase to frame number;
The present frame that calculates described second network in GSM51 multi-frame corresponding second-phase to frame number;
Calculate described first-phase to frame number and second-phase the difference to frame number, to obtain described the second frame number difference.
6. the frame position of mobile terminal according to claim 1 is determined method, it is characterized in that, the expansion frame number of the target frame of described first network and the target frame of described second network are as follows with respect to the computing formula of the skew of the target frame of described first network:
T3=T1+floor（（TD_len*12*Delta_GSM_sfh/13+offset_A）/TD_len）
offset_B=(TD_len*12*Delta_GSM_sfh/13+offset_A)%TD_len
Wherein, T3 is the expansion frame number of the target frame of described first network, T1 is the expansion frame number of the initial frame of described first network, TD_len is the frame length of described first network frame, Delta_GSM_sfh is the difference of the frame number of target frame and the frame number of initial frame of described second network, offset_A is that the initial frame of described second network is with respect to the skew of the initial frame of described first network, offset_B is that the target frame of described second network is with respect to the skew of the target frame of described first network, floor is rounding operation, and % is for getting remainder operation.
7. a frame method of reseptance for mobile terminal, is characterized in that, comprising:
The frame position of the mobile terminal described in claim 1 to 6 any one is determined method;
The expansion frame number of the target frame based on described first network and the target frame of described second network, with respect to the skew of the target frame of described first network, receive the target frame of second network.
8. a frame position determining device for mobile terminal, is characterized in that, comprising:
Record cell, for be recorded in first terminal card and the second terminal card when synchronous described in the frame number of initial frame of second network at expansion frame number, described the second terminal card place of initial frame of first network at first terminal card place and the initial frame of described second network with respect to the skew of the initial frame of described first network, the scope of described expansion frame number be frame number scope N doubly, the count frequency of described expansion frame number is consistent with the count frequency of frame number, and N is more than or equal to 2;
The first determining unit, for the expansion frame number of initial frame of the expansion frame number of the present frame based on first network, described first network and the frame number of the initial frame of second network, determines the frame number of the present frame of second network;
The second determining unit, for the frame number of the present frame based on described second network, determines the frame number of the target frame of second network;
The 3rd determining unit, frame number for the initial frame of the expansion frame number of initial frame based on described first network, described second network with respect to the skew of the initial frame of described first network and the target frame of second network, determines the skew with respect to the target frame of described first network of the expansion frame number of target frame of first network and the target frame of described second network.
9. the frame position determining device of a kind of mobile terminal according to claim 8, is characterized in that, in the time that mobile terminal generation network switches, described expansion frame number is counted again.
10. the frame position determining device of a kind of mobile terminal according to claim 8, is characterized in that, described the first determining unit comprises:
Expansion frame number difference computational unit, for calculating the expansion frame number difference of present frame and initial frame of first network;
The first frame number difference computational unit, for according to the frame length proportionate relationship of first network and second network and described expansion frame number difference, calculates the present frame of second network and the first frame number difference of initial frame;
Current frame number determining unit, for the frame number of the initial frame based on described the first frame number difference and second network, determines the frame number of the present frame of second network.
The frame position determining device of 11. a kind of mobile terminals according to claim 8, is characterized in that, described the second determining unit, comprising:
The second frame number difference acquiring unit, for obtaining the target frame of second network and the second frame number difference of present frame;
Target frame number determining unit, determines the frame number of the target frame of second network for the frame number of the present frame based on described second network and described the second frame number difference.
The frame position determining device of 12. mobile terminals according to claim 11, is characterized in that, described second network is GSM network, and described the second frame number difference acquiring unit comprises:
First-phase is to frame number acquiring unit, for the target frame of obtaining described second network at first-phase corresponding to GSM51 multi-frame to frame number;
Second-phase is to frame number computing unit, for the present frame that calculates described second network at second-phase corresponding to GSM51 multi-frame to frame number;
The second frame number difference computational unit, for calculate described first-phase to frame number and second-phase the difference to frame number, to obtain described the second frame number difference.
The frame position determining device of 13. a kind of mobile terminals according to claim 8, it is characterized in that, described the 3rd determining unit, for calculating the skew with respect to the target frame of described first network of the expansion frame number of target frame of described first network and the target frame of described second network, formula is as follows:
T3=T1+floor（（TD_len*12*Delta_GSM_sfh/13+offset_A）/TD_len）
offset_B=(TD_len*12*Delta_GSM_sfn/13+offset_A)%TD_len
Wherein, T3 is the expansion frame number of the target frame of described first network, T1 is the expansion frame number of the initial frame of described first network, TD_len is the frame length of described first network frame, Delta_GSM_sfh is the difference of the frame number of target frame and the frame number of initial frame of described second network, offset_A is that the initial frame of described second network is with respect to the skew of the initial frame of described first network, offset_B is that the target frame of described second network is with respect to the skew of the target frame of described first network, floor is rounding operation, and % is for getting remainder operation.
14. 1 kinds of mobile terminals, is characterized in that, comprising:
Frame position determining device described in claim 8 to 13 any one;
Frame receiving element, the skew for the expansion frame number of the target frame based on described first network and the target frame of described second network with respect to the target frame of described first network, receives the target frame of second network.
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