CN101969691A - GSM/LTE (Global System for Mobile Communications/Long Term Evolution) double-module terminal system timing method and device thereof - Google Patents

GSM/LTE (Global System for Mobile Communications/Long Term Evolution) double-module terminal system timing method and device thereof Download PDF

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CN101969691A
CN101969691A CN2010105236506A CN201010523650A CN101969691A CN 101969691 A CN101969691 A CN 101969691A CN 2010105236506 A CN2010105236506 A CN 2010105236506A CN 201010523650 A CN201010523650 A CN 201010523650A CN 101969691 A CN101969691 A CN 101969691A
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frame
gsm
lte
mode
samples
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陈发堂
李小文
王丹
王华华
刘宇
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Chongqing University of Post and Telecommunications
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Chongqing University of Post and Telecommunications
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Abstract

The invention discloses a GSM/LTE (Global System for Mobile Communications/Long Term Evolution) double-module terminal system timing method which completes the timing synchronization of two working modes by calculating the timing relation between a determined working mode and the other working mode in the determined working mode after the initial synchronous information between a GSM working mode and an LTE working mode is acquired according to frame structures and the interrelation of the GSM working mode and the LTE working mode. The GSM/LTE double-module terminal system timing method comprises the following steps of: calibrating initial time under the LTE working mode; calibrating the initial time in the GSM working mode; calculating a GSM clock working in the LTE working mode; and calculating an LTE clock working in the GSM working mode. The method and the device solve the problem of calculation of the timing relation between systems in the operating process of the GSM/LTE double-module terminal system and uniformly time; in addition, the invention not only decreases one system clock, but also prevents the clock disorder phenomena of system clocks. The invention also discloses the device adopting the GSM/LTE double-module terminal system timing method, i.e. a GSM/LTE double-module single-operation automatic switching terminal.

Description

GSM/LTE dual-mode terminal system timing method and device thereof
Technical field
The present invention relates to the time synchronized field in the mobile communcations system, be specifically related to dual-mode terminal system timing method and device thereof.
Background technology
The gsm system of prior art is very ripe, also has numerous users.Progressively commercial along with the LTE system, LTE has bigger advantage in data transmission than TD-SCDMA, and LTE and GSM have complementary advantages, so gsm system will will coexist in a long term with the LTE system, so produce the demand to the GSM/LTE dual-mode terminal.
GSM/LTE dual-mode dual-standby technique guarantee two systems work alone simultaneously, be independent of each other, have big practicality and market prospects; But because this technical costs height and power consumption are big, existing terminal also temporarily can't reach its performance requirement, so GSM/LTE double-mode single-standby automatic switchover terminal still can exist in a period of time as a kind of transitional technology.GSM/LTE double-mode single-standby automatic switchover demanding terminal is monitored the signal of another pattern in one mode the time when system works, so that carry out operating between system, finishes inter-related task.
Although GSM single-mode terminal timing system and LTE single-mode terminal timing system are all used frame number and sample period express time, but their frame is different with the sampling point duration, frame is different with sampling point ordering span, and the control clock is separate, makes that both synchronization timings are comparatively difficult.If use two independent control clocks in GSM/LTE dual-mode terminal system, not only take more hardware resource, and increased the weight of the Frame Design of GSM/LTE dual-mode terminal system, thereby influenced GSM/LTE dual-mode terminal performance.
Therefore, be necessary to propose a kind of timing method of GSM/LTE dual-mode terminal, the system that makes need not by two independent control times are set, and just can set the time that listens to the mode of operation of awaiting orders under the mode of operation simultaneously, and then improve GSM/LTE dual-mode terminal system and carry out efficient.
Summary of the invention
In view of this,, the invention discloses a kind of GSM/LTE dual-mode terminal system timing method, solved regularly Frame Design complexity of GSM/LTE dual-mode terminal system, expend hardware resource, the chaotic easily problem of control clock between each system in order to address the above problem.
The object of the present invention is achieved like this: GSM/LTE dual-mode terminal system timing method may further comprise the steps:
1) sample rate that presets according to the GSM frame is determined in the frame of a GSM frame sampling point sequence number in the number of samples and frame;
According to the sample rate that the LTE frame presets, determine the interior number of samples of frame and the interior sampling point sequence number of frame of a LTE frame;
2) initialization system work at present pattern;
3) obtain sample period in the initial frame number of work at present pattern and standby and the initial frame;
4) behind the elapsed time T, number of samples in the frame number of register system experience and the frame under the work at present pattern; Utilize the transmission speed ratio of GSM frame and LTE frame, number of samples in the frame number of work at present pattern experience and the frame is converted to number of samples in the frame number of the corresponding experience of standby and the frame; Wherein, the minimum sampling point duration cut apart greater than sampling point in the frame under the work at present pattern of T;
5) ask for respectively under the work at present pattern in initial frame number, the initial frame number of samples in the sample period and experience frame number, frame and, and be integrated into sample period in current frame number under the work at present pattern and the present frame according to the sampling point sequence number cycle in frame number sequence number cycle and the frame; Respectively sample period in current frame number and the present frame is corresponded to current time under the mode of operation according to the duration of mode of operation next frame correspondence with by the minimum sampling point duration that sampling point in the frame is cut apart;
Ask for respectively in the initial frame number under the standby, initial frame number of samples in the sample period and experience frame number, frame and, and be integrated into sample period in current frame number under the standby and the present frame according to the sampling point sequence number cycle in frame number sequence number cycle and the frame; Respectively sample period in current frame number and the present frame is corresponded to current time under the standby according to the duration of standby next frame correspondence with by the minimum sampling point duration that sampling point in the frame is cut apart.
Further, step 2) when being set at the LTE pattern, step 3) to step 5) is specially:
3) finish control multi-frame decoding at the idle time slot of system, read the gsm system frame number that decoding comprises, gsm system frame number and control delivery multiframe period are got initial frame number GSMFn0 under the GSM pattern;
Write down initial frame number LTEFn0 and the interior sample period LTESn0 of initial frame under the LTE mode of operation corresponding with the initial frame number GSMFn0 of GSM mode of operation;
4) behind the elapsed time T, number of samples LTESn in the frame number LTEFn of record LTE mode of operation experience and the frame; Transmission speed according to LTE and GSM frame compares V LTE/GSM, by following formula number of samples LTESn in the frame number LTEFn of LTE mode of operation experience and the frame is converted to number of samples GSMSn in the frame number GSMFn of the corresponding experience of GSM mode of operation and the frame:
GSMFn = floor ( ( LTEFn + LTESn / LTEnode ) × 1 V LIE / GSM ) ;
GSMSn = ( ( LTEFn + LTESn / LTEnode ) × 1 V LTE / GSM - GSMFn ) × GSMnode ;
Wherein, LTEnode is a number of samples in the LTE frame; GSMnode is a number of samples in the GSM frame, and floor represents to round downwards, the minimum sampling point duration that T is cut apart greater than sampling point in the frame under the LTE pattern;
5) may further comprise the steps:
Ask under the LTE mode of operation that sample period LTESnl is in the current frame number LTEFnl and present frame: LTEFnl=(LTEFn0+LTEFn+floor ((LTSn0+LTESn)/LTEnode))) mod LTEFcle;
LTESnl＝(LTESn0+LTESn)mod?LTEnode；
Ask under the GSM mode of operation that sample period GSMSnl is in the current frame number GSMFnl and present frame:
GSMFnl＝(GSMF0+GSMFn+floor(GSMSn/GSMnode))mod?CFcle；
GSMSnl＝(GSMSn)mod?GSMnode；
Wherein, CFcle is for controlling multiframe period, and LTEFcle is the LTE frame number sequence number cycle, and mod represents delivery;
The minimum sampling point duration of cutting apart by sampling point in the duration of each pattern next frame correspondence and the frame respectively each pattern correspondence sample period in current frame number and the present frame is corresponded to current time under each pattern;
Further, the control multi-frame in the step 3) is a SCH control multi-frame;
Further, number of samples obtains in the following ways in frame number that experiences under the LTE mode of operation in the step 4) and the frame: number of samples in frame number that experiences under the LTE mode of operation of minimum this section of sampling point duration LTE_u record experience time T correspondence of being cut apart by sampling point in the frame with the LTE frame and the frame:
LTEFn＝floor(floor(T/LTE_u)/LTEnode)；
LTESn＝floor(T/LTE_u)nod?LTEnode；
Further, when step 2) when being set at the GSM pattern, step 3) to step 5) is specially:
3) determine the initial frame number LTEFn0 of LTE by the measuring reference signals received power;
Write down the initial frame number GSMFn0 and the initial interior sample period GSMSn0 of the GSM mode of operation corresponding with the initial frame number LTEFn0 of LTE mode of operation;
4) behind the elapsed time T, number of samples GSMSn in the frame number GSMFn of record GSM mode of operation experience and the frame; Transmission speed according to LTE and GSM frame compares V LTE/GSM, by following formula number of samples GSMSn in the frame number GSMFn of GSM mode of operation experience and the frame is converted to number of samples LTESn in the frame number LTEFn of the corresponding experience of LTE mode of operation and the frame:
LTEFn＝foor((GSMFn+GSMSn/GSMnode)×V LTE/GSM)；
LTESn＝((GSMFn+GSMSn/GSMnode)×V LTE/GSM-LTEFn)×LTEnode；
Wherein, LTEnode is a number of samples in the LTE frame; GSMnode is a number of samples in the GSM frame, and floor represents to round downwards, the minimum sampling point duration that T is cut apart greater than sampling point in the frame under the LTE pattern;
5) may further comprise the steps:
Ask under the LTE mode of operation that sample period LTESnl is in the current frame number LTEFnl and present frame:
LTEFnl＝(LTEFn0+LTEFn+floor((LTESn)/LTEnode))mod?LTEFcle；
LTESnl＝(LTESn)mod?LTEnode；
The interior sample period GSMSnl of current frame number GSMFnl and present frame is under the GSM mode of operation:
GSMFnl＝(GSMFn0+GSMFn+floor((GSMSn0+GSMSn)/GSMnode))mod?CFcle；
GSMSnl＝(GSMSn0+GSMSn)mod?GSMnode；
Wherein, CFcle is 51, and LTEFcle is the sequence number cycle of LTE frame number, and mod represents delivery;
The minimum sampling point duration of cutting apart by sampling point in the duration of each pattern next frame correspondence and the frame respectively each pattern correspondence sample period in current frame number and the present frame is corresponded to current time under each pattern;
Further, number of samples obtains in the following ways in frame number that experiences under the GSM mode of operation in the step 4) and the frame: number of samples in frame number that experiences under the GSM mode of operation of minimum this section of sampling point duration GSM_u record experience time T correspondence of being cut apart by sampling point in the frame with the GSM frame and the frame:
GSMFn＝floor(floor(T/GSM_u)/GSMnode)；
GSMSn＝floor(T/GSM_u)mod?GSMnode。
Also disclose GSM/LTE dual-mode terminal System Timing Unit, described device is a GSM/LTE double-mode single-standby automatic switchover terminal, and described GSM/LTE double-mode single-standby automatic switchover terminal only is provided with a control clock.
The invention has the beneficial effects as follows: the speed ratio of pressing GSM and LTE frame, number of samples in the frame number of expression work at present mode time in the GSM/LTE dual-mode terminal system and the frame is converted to the expression number of samples in the frame number of mode of operation time and the frame of awaiting orders, simplified that two kinds of mode of operations need be provided with hardware construction and the complication system Frame Design that independent control clock is finished timed task respectively in the GSM/LTE dual-mode terminal system, avoided the confusion between two control clocks to disturb; Designed GSM/LTE dual-mode terminal only needs a clock source, has simplified the complexity of system design, has improved the net synchronization capability of system, has reduced power consumption, has prolonged the operating time and the life-span of terminal.Simultaneously, GSM and LTE frame are refined as sampling point in the frame by sample rate separately, have satisfied of the different requirements of two systems synchronization accuracy.
Description of drawings
Fig. 1 is clock synchronization timing flow chart of the present invention;
Fig. 2 is the clock synchronization timing flow chart that is operated under the LTE pattern;
Fig. 3 is the clock synchronization timing flow chart that is operated under the GSM pattern.
Embodiment
Below will describe in detail the preferred embodiments of the present invention.
The time of GSM single-mode terminal represents that by sample period GSMSn two parts in frame number GSMFn and the frame wherein the frame number scope is 0,1 ..., 2715647.Owing to when obtaining the synchronizing information of GSM, need the GSM terminal to read synchronizing channel (SCH) information.Because multiframe period of synchronizing channel (SCH) is 51, so the GSM timing system is based on the timing system of 51 frames, and being about to System Frame Number mould 51, to obtain scope be 0,1 ..., 50 frame number.
The sample period is relevant with the over-sampling rate of GSM frame structure and gsm system in the frame of GSM frame, the GSM frame is made of 8 time slots, each time slot is made of 156.25 bits, and the over-sampling rate of each bit that is provided with is 8 usually, and therefore the number of samples of a GSM frame is 156.25 * 8 * 8=10 4, then the sequence number of sampling point is in the GSM frame: 0,1 ..., 9999.Because GSM frame duration length T GSMBe 120/26 millisecond, so the time span GSM_u of the minimum sampling point of gsm system is:
GSM _ u = T GSM × 10 - 3 156.25 × 8 × 8 ≈ 4.62 × 10 - 7 s - - - ( 1 )
In GSM single-mode terminal timing system, system is controlled by independent clock the minimum sampling point time.
The timing system of LTE single-mode terminal is to represent that by sample period LTESn two parts in frame number LTEFn and the frame serial number range of frame number LTEFn is 0,1 ..., 10239.The timing accuracy of LTE system is relevant with the sample rate of LTE system, and it is 4 that over-sampling rate is set usually, and promptly timing accuracy is 1/4T s, T wherein sIt is chronomere minimum in the LTE system.The LTE subframe lengths is 30720T s, promptly 1 millisecond, be designated as T LTE, so the sequence number span of sample period LTESn is 0,1 in the frame ..., 122879.Because LTE system subframe duration length is 1 millisecond, then the time span LTE_u of the minimum sampling point of LTE system is:
LTE _ u = 10 - 3 30720 * 4 ≈ 8.14 × 10 - 9 s - - - ( 2 )
In LTE single-mode terminal timing system, system is controlled by independent clock the minimum sampling point time.
From duration of GSM frame and LTE subframe as can be known both transmission speed ratios be:
V LTE / GSM = V LTE V GSM = T GSM T LTE = 60 13 - - - ( 3 )
As shown in Figure 1, clock synchronization flow process thought of the present invention is: at first select mode of operation, obtain the initial synchronisation information of standby and mode of operation under mode of operation; Number of samples in the frame number of the corresponding experience of each pattern and the frame behind the calculating elapsed time T; Evaluation work pattern and standby work as preamble information.
The present invention selects GSM/LTE double-mode single-standby automatic switchover terminal for use, and described GSM/LTE double-mode single-standby automatic switchover terminal only is provided with a control clock.
The GSM/LTE dual-mode terminal regularly is divided into four kinds of situations synchronously:
Fig. 2 shows under the LTE mode of operation, confirms the flow process of the clock synchronization information of GSM and LTE; Under the LTE mode of operation, obtain the initial synchronisation information of GSM and LTE; Behind the elapsed-time standards section T, ask for the frame number and the interior number of samples of frame of the corresponding experience of each pattern; Last evaluation work pattern and standby work as preamble information;
Embodiment one
When the GSM/LTE dual-mode terminal is operated under the LTE mode of operation, its regularly step be:
1) finishes synchronizing channel (SCH) decoding at the idle time slot of system, read the gsm system frame number that decoding comprises;
Because synchronizing channel (SCH) is 51 multi-frames,, gsm system frame number and digital 51 deliverys are got initial frame number GSMFn0 under the GSM pattern so only need be concerned about 51 multi-frame positional informations;
Write down frame number LTEFn0 and the interior sample period LTESn0 of frame under the LTE mode of operation corresponding with the initial frame number GSMFn0 of GSM mode of operation;
2) behind T after a while, number of samples LTESn in the frame number LTEFn of record LTE mode of operation experience and the frame; Than 60: 13, number of samples LTESn in the frame number LTEFn of LTE mode of operation experience and the frame is converted to number of samples GSMSn in the frame number GSMFn of the corresponding experience of GSM mode of operation and the frame according to the transmission speed of LTE and GSM frame:
GSMFn＝floor((LTEFn+LTESn/122880)×13/60) (4)
GSMSn＝((LTEFn+LTESn/122880)×13/60-GSMFn)×10 4 (5)
Wherein, 122880 for over-sampling rate be number of samples in the frame of LTE frame under 4 the situation; 10000 for over-sampling rate is a number of samples in the frame of GSM frame under 8 the situation, and floor represents to round downwards, the minimum sampling point duration that T is cut apart greater than sampling point in the frame under the LTE mode of operation.
3) ask for this section of experience after the period, the interior sample period LTESnl of current frame number LTEFnl and present frame is under the LTE mode of operation:
LTEFnl＝(LTEFn0+LTEFn+floor((LTESn0+LTESn)/122880)))mod?10240 (6)
LTESnl＝(LTESn0+LTESn)mod?122880 (7)
Ask for this section of experience after the period, the interior sample period GSMSnl of current frame number GSMFnl and present frame is under the GSM mode of operation:
GSMFnl＝(GSMF0+GSMFn+floor(GSMSn/10 4))mod?51 (8)
GSMSnl＝(GSMSn)mod?10 4 (9)
Wherein, 51 expression synchronizing channel (SCH) multiframe periods, 10240 is the LTE frame number sequence number cycle, and mod represents delivery.
4) according to GSM frame duration length T GSM: time span GSM_u:4.62 * 10 of the minimum sampling point of 120/26 millisecond and GSM -7S is converted into sample period GSMSnl in current frame number GSMFnl and the present frame under the GSM pattern current time of this pattern; In like manner, according to LTE one frame duration T LTE: 1 millisecond and the minimum sampling point duration of LTE LTE_u:8.14 * 10 -9S is converted into sample period LTESnl in current frame number LTEFnl and the present frame under the LTE pattern current time of this pattern.
Embodiment two
When the GSM/LTE dual-mode terminal is operated under the LTE mode of operation, and it is convenient definite through determining time T, (as: system is in sleep pattern, has only timer in work and directly obtain when number of samples is had any problem in the frame number that experiences and frame under the LTE mode of operation of this time T correspondence of experience; The time of experience is only known after need waking up synchronously by system, and does not know sample period in System Frame Number and the frame), except that step 2), the mode that employing and embodiment one are similar;
Step 2) be:
Obtain elapsed-time standards value T from system control clock, determine number of samples in the frame number that experiences under the LTE mode of operation and the frame with following formula:
LTEFn＝floor(floor(T/LTE_u)/122880) (10)
LTESn＝floor(T/LTE_u)mod?122880 (11)
Determine number of samples in corresponding frame number that experiences of GSM mode of operation and the frame with following formula:
GSMFn＝floor(floor(T/GSM_u)/10 4) (12)
GSMSn＝floor(T/GSM_u)mod?10 4 (13)
Wherein, LTE_u is the minimum sampling point duration that the LTE frame is cut apart by sampling point in the frame, and GSM_u is the minimum sampling point duration that the GSM frame is cut apart by sampling point in the frame.
Fig. 3 shows under the GSM mode of operation, confirms the flow process of the clock synchronization information of GSM and LTE; Under the GSM mode of operation, obtain the initial synchronisation information of GSM and LTE; Behind the elapsed-time standards section T, ask for the frame number and the interior number of samples of frame of the corresponding experience of each pattern; Last evaluation work pattern and standby work as preamble information;
Embodiment three
When the GSM/LTE dual-mode terminal is operated under the GSM mode of operation, its regularly step be:
1) determines the initial frame number LTEFn0 of LTE by measuring reference signals received power (RSRP);
Write down the initial frame number GSMFn0 and the interior sample period GSMSn0 of frame of the GSM mode of operation corresponding with the initial frame number LTEFn0 of LTE mode of operation;
2) behind T after a while, number of samples GSMSn in the frame number GSMFn of record GSM mode of operation experience and the frame; Than 60: 13, number of samples GSMSn in the frame number GSMFn of GSM mode of operation experience and the frame is converted to number of samples LTESn in the frame number LTEFn of the corresponding experience of LTE mode of operation and the frame according to the transmission speed of LTE and GSM frame:
LTEFn＝floor((GSMFn+GSMSn/10 4)×60/13) (14)
LTESn＝((GSMFn+GSMSn/10 4)×60/13-LTEFn)×122880 (15)
Wherein, 122880 for over-sampling rate be the number of samples that the LTE frame may be partitioned under 4 the situation; 10 4Be the number of samples that the GSM frame is divided under 8 the situation for over-sampling rate, floor represents to round downwards, the minimum sampling point duration that T is cut apart greater than sampling point in the frame under the GSM mode of operation;
3) experience this section after the period, the interior sample period LTESnl of current frame number LTEFnl and present frame is under the LTE mode of operation:
LTEnl＝(LTEFn0+LTEFn+floor((LTESn)/122880))mod10240 (16)
LTESnl＝(LTESn)mod122880 (17)
The interior sample period GSMSnl of current frame number GSMFnl and present frame is under the GSM mode of operation:
GSMFnl＝(GSMFn0+GSMFn+floor((GSMSn0+GSMSn)/10 4))mod?51?(18)
GSMSnl＝(GSMSn0+GSMSn)mod?10 4 (19)
4) according to GSM frame duration length T GSM: time span GSM_u:4.62 * 10 of the minimum sampling point of 120/26 millisecond and GSM -7S is converted into sample period GSMSnl in current frame number GSMFnl and the present frame under the GSM pattern current time of this pattern; T when in like manner, continuing according to LTE one frame LTE: 1 millisecond and the minimum sampling point duration of LTE LTE_u:8.14 * 10 -9S is converted into sample period LTESnl in current frame number LTEFnl and the present frame under the LTE pattern current time of this pattern.
Embodiment four
When the GSM/LF dual-mode terminal is operated under the GSM mode of operation, and conveniently determine elapsed time T, and directly obtain when number of samples is had any problem in the frame number of the experience under the GSM mode of operation of this time T correspondence of experience and the frame; Mode like employing and the embodiment three-phase, different is step 2) be:
Obtain elapsed-time standards value T from system control clock, with step 2 among the embodiment two) method obtain number of samples in frame number corresponding under each pattern of this section period experience and the frame.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (7)

1.GSM/LTE the dual-mode terminal system timing method is characterized in that: may further comprise the steps:
1) sample rate that presets according to the GSM frame is determined in the frame of a GSM frame sampling point sequence number in the number of samples and frame;
According to the sample rate that the LTE frame presets, determine the interior number of samples of frame and the interior sampling point sequence number of frame of a LTE frame;
2) initialization system work at present pattern;
3) obtain sample period in the initial frame number of work at present pattern and standby and the initial frame;
4) behind the elapsed time T, number of samples in the frame number of register system experience and the frame under the work at present pattern; Utilize the transmission speed ratio of GSM frame and LTE frame, number of samples in the frame number of work at present pattern experience and the frame is converted to number of samples in the frame number of the corresponding experience of standby and the frame; Wherein, the minimum sampling point duration cut apart greater than sampling point in the frame under the work at present pattern of T;
5) ask for respectively under the work at present pattern in initial frame number, the initial frame number of samples in the sample period and experience frame number, frame and, and be integrated into sample period in current frame number under the work at present pattern and the present frame according to the sampling point sequence number cycle in frame number sequence number cycle and the frame; Respectively sample period in current frame number and the present frame is corresponded to current time under the mode of operation according to the duration of mode of operation next frame correspondence with by the minimum sampling point duration that sampling point in the frame is cut apart;
Ask for respectively in the initial frame number under the standby, initial frame number of samples in the sample period and experience frame number, frame and, and be integrated into sample period in current frame number under the standby and the present frame according to the sampling point sequence number cycle in frame number sequence number cycle and the frame; Respectively sample period in current frame number and the present frame is corresponded to current time under the standby according to the duration of standby next frame correspondence with by the minimum sampling point duration that sampling point in the frame is cut apart.
2. GSM/LTE dual-mode terminal system timing method as claimed in claim 1 is characterized in that: step 2) when being set at the LTE pattern, step 3) to step 5) is specially:
3) finish control multi-frame decoding at the idle time slot of system, read the gsm system frame number that decoding comprises, gsm system frame number and control delivery multiframe period are got initial frame number GSMFn0 under the GSM pattern;
Write down initial frame number LTEFn0 and the interior sample period LTESn0 of initial frame under the LTE mode of operation corresponding with the initial frame number GSMFn0 of GSM mode of operation;
4) behind the elapsed time T, number of samples LTESn in the frame number LTEFn of record LTE mode of operation experience and the frame; Transmission speed according to LTE and GSM frame compares V LTE/GSM, by following formula number of samples LTESn in the frame number LTEFn of LTE mode of operation experience and the frame is converted to number of samples GSMSn in the frame number GSMFn of the corresponding experience of GSM mode of operation and the frame:
GSMFn = floor ( ( LTEFn + LTESn / LTEnode ) × 1 V LTE / GSM ) ;
GSMSn = ( ( LTEFn + LTESn / LTEnode ) × 1 V LTE / GSM - GSMFn ) × GSMnode ;
Wherein, LTEnode is a number of samples in the LTE frame; GSMnode is a number of samples in the GSM frame, and floor represents to round downwards, the minimum sampling point duration that T is cut apart greater than sampling point in the frame under the LTE pattern;
5) may further comprise the steps:
Ask under the LTE mode of operation that sample period LTESnl is in the current frame number LTEFnl and present frame: LTEFnl=(LTEFn0+LTEFn+floor ((LTESn0+LTESn)/LTEnode))) mod LTEFcle;
LTESnl＝(LTESn0+LTESn)mod?LTEnode；
Ask under the GSM mode of operation that sample period GSMSnl is in the current frame number GSMFnl and present frame:
GSMFnl＝(GSMF0+GSMFn+floor(GSMSn/GSMnode))mod?CFcle；
GSMSnl＝(GSMSn)nod?GSMnode；
Wherein, CFcle is for controlling multiframe period, and LTEFcle is the LTE frame number sequence number cycle, and mod represents delivery;
The minimum sampling point duration of cutting apart by sampling point in the duration of each pattern next frame correspondence and the frame respectively each pattern correspondence sample period in current frame number and the present frame is corresponded to current time under each pattern.
3. GSM/LTE dual-mode terminal system timing method as claimed in claim 2 is characterized in that: the control multi-frame in the step 3) is a SCH control multi-frame.
4. GSM/LTE dual-mode terminal system timing method as claimed in claim 3 is characterized in that: number of samples obtains in the following ways in frame number that experiences under the LTE mode of operation in the step 4) and the frame: number of samples in frame number that experiences under the LTE mode of operation of minimum this section of sampling point duration LTE_u record experience time T correspondence of being cut apart by sampling point in the frame with the LTE frame and the frame:
LTEFn＝floor(floor(T/LTE_u)/LTEnode)；
LTESn＝floor(T/LTE_u)mod?LTEnode。
5. GSM/LTE dual-mode terminal system timing method as claimed in claim 1 is characterized in that: when step 2) when being set at the GSM pattern, step 3) to step 5) is specially:
3) determine the initial frame number LTEFn0 of LTE by the measuring reference signals received power;
Write down the initial frame number GSMFn0 and the interior sample period GSMSn0 of initial frame of the GSM mode of operation corresponding with the initial frame number LTEFn0 of LTE mode of operation;
4) behind the elapsed time T, number of samples GSMSn in the frame number GSMFn of record GSM mode of operation experience and the frame; Transmission speed according to LTE and GSM frame compares V LTE/GSM, by following formula number of samples GSMSn in the frame number GSMFn of GSM mode of operation experience and the frame is converted to number of samples LTESn in the frame number LTEFn of the corresponding experience of LTE mode of operation and the frame:
LTEFn＝floor((GSMFn+GSMSn/GSMnode)×V LTE/GSM)；
LTESn＝((GSMFn+GSMSn/GSMnode)×V LTE/GSM-LTEFn)×LTEnode；
Wherein, LTEnode is a number of samples in the LTE frame; GSMnode is a number of samples in the GSM frame, and floor represents to round downwards, the minimum sampling point duration that T is cut apart greater than sampling point in the frame under the LTE pattern;
5) may further comprise the steps:
Ask under the LTE mode of operation that sample period LTESnl is in the current frame number LTEFnl and present frame:
LTEFnl＝(LTEFn0+LTEFn+floor((LTESn/LTEnode))mod?LTEFcle；
LTESnl＝(LTESn)mod?LTEnode；
The interior sample period GSMSnl of current frame number GSMFnl and present frame is under the GSM mode of operation:
GSMFnl＝(GSMFn0+GSMFn+floor((GSMSn0+GSMSn)/GSMnode))modCFcle；
GSMSnl＝(GSMSn0+GSMSn)mod?GSMnode；
Wherein, CFcle is 51, and LTEFcle is the sequence number cycle of LTE frame number, and mod represents delivery;
The minimum sampling point duration of cutting apart by sampling point in the duration of each pattern next frame correspondence and the frame respectively each pattern correspondence sample period in current frame number and the present frame is corresponded to current time under each pattern.
6. GSM/LTE dual-mode terminal system timing method as claimed in claim 5 is characterized in that: number of samples obtains in the following ways in frame number that experiences under the GSM mode of operation in the step 4) and the frame: number of samples in frame number that experiences under the GSM mode of operation of minimum this section of sampling point duration GSM_u record experience time T correspondence of being cut apart by sampling point in the frame with the GSM frame and the frame:
GSMFn＝floor(floor(T/GSM_u)/GSMnode)；
GSMSn＝floor(T/GSM_u)mod?GSMnode。
7. use device as each GSM/LTE dual-mode terminal system timing method of claim 1 to 6, it is characterized in that: described device is a GSM/LTE double-mode single-standby automatic switchover terminal, and described GSM/LTE double-mode single-standby automatic switchover terminal only is provided with a control clock.
CN2010105236506A 2010-10-29 2010-10-29 GSM/LTE (Global System for Mobile Communications/Long Term Evolution) double-module terminal system timing method and device thereof Pending CN101969691A (en)

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