CN101646231B - Timing recovery method for mobile terminal sleeping awakening in TD-SCDMA system - Google Patents
Timing recovery method for mobile terminal sleeping awakening in TD-SCDMA system Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 39
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- 238000005070 sampling Methods 0.000 claims abstract description 31
- 230000001360 synchronised effect Effects 0.000 claims description 43
- 238000006073 displacement reaction Methods 0.000 claims description 35
- 238000012549 training Methods 0.000 claims description 28
- 238000009825 accumulation Methods 0.000 claims description 24
- 244000188472 Ilex paraguariensis Species 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 7
- 230000002618 waking effect Effects 0.000 claims description 2
- 230000036578 sleeping time Effects 0.000 abstract 1
- 108091006146 Channels Proteins 0.000 description 43
- 230000007958 sleep Effects 0.000 description 22
- 238000005259 measurement Methods 0.000 description 14
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Abstract
The invention discloses a timing recovery method for mobile terminal sleeping awakening in TD-SCDMA system, including that a UE receives TS0 midamble and SYNC_DL sequences of each sub frame before arrival of an objective PICH after a mobile terminal triggers sleeping awakening and devices are steady, and PICH timeslot midamble, TS0 midamble, SYNC_DL sequence base band data of the objective PICH sub frame is completely received based on high speed A/D sampling, and timing recovery is carried out. Timing recovery method of the invention is adopted, beacon channel midamble and SYNC_DL information required by timing recovery of sleeping awakening are integrated, the conventional idea that timing recovery needs to be completed before arrival of the PICH sub frame in the existing scheme is overturned, time buffer of timing recovery is successfully obtained by high speed A/D sampling base band data total number receiving, and meanwhile class beacon channel characteristic of PICH channel is utilized, so as to use PICH midamble as data sample, and enough data quantity can be obtained in shorter time to realize timing recovery, thus the UE can obtain longer sleeping time and power consumption of the UE is effectively reduced.
Description
Technical field
The present invention relates to the time synchronization method between portable terminal and serving BS in the GSM, mobile terminal sleeping wakes the synchronous restoration methods of timing between back and serving BS up in the particularly a kind of TD-SCDMA system.
Background technology
(be called for short, TD-SCDMA) in the system, portable terminal (is called for short, UE) two basic operator schemes is arranged: idle pulley and connection mode Time Division-Synchronous Code Division Multiple Access.The UE that is in idle pulley is identified by Non-Access Stratum.The information that has no UE under the independent idle pulley in the TD-SCDMA system, it can only carry out addressing, and all UE or all UE of monitoring same paging occasions send message in the sub-district.
UE is under the idle pulley, has following groundwork usually:
1, monitors paging
2, cell measurement
3, receive from public land mobile network (abbreviation, system message PLMN)
Wherein, said system message receive based on the persistent district Primary Common Control Physical Channel (be called for short, information analysis PCCPCH), and depend on the notice of paging Class1 message, said paging Class1 message bearing in PCH (be called for short, PCH) in; Paging is monitored successively based on Page Indication Channel and (is called for short, PICH) with the information analysis of PCH; District reselecting triggers according to the measurement result of basis, adjacent sub-district Primary Common Control Physical Channel received signal code power (being called for short PCCPCH RSCP); In addition, provide support for RRC connects to set up, (be called for short, measurement ISCP) also needs each downlink slot interfering signal of time sign indicating number power of Serving cell.
It is thus clear that; The steady job task of UE mainly is paging monitoring and cell measurement and Serving cell descending time slot ISCP measurement under the idle pulley; And whether operating state is migrated to RRC connection mode or update system message, and whether initiate district reselecting according to the measurement result decision according to paging snoop results decision.
Said paging monitoring and district reselecting measuring task are normally periodically carried out according to high-rise designated time intervals; And said appointment execution cycle (paging cycle and measuring period; According to 3GPP TS 25.123, be the integral multiple of paging cycle measuring period) accomplish the average handling time of said required by task much larger than UE.That is, under idle pulley, UE will have the plenty of time to be in the idling conditions of no task.Obviously, said idling conditions is the significant wastage to UE resource and power consumption.
Given this, present main flow UE solution has been introduced new UE mode of operation a--sleep pattern again.Said sleep pattern is defined as: when UE was in the idling conditions of no task, UE closed high-frequency work clock, peripheral ABB device, radio-frequency devices etc., only uses low-frequency clock to carry out work, to reach the power saving purpose under the idling conditions.Sleep pattern will finish before task arrives; The said concluding time is a foundation with PICH time of advent usually; Said ending method is for recovering the operating state of stable high frequency clock, peripheral ABB device, radio-frequency devices etc., and relevant operation is called sleep awakening.
Through after the sleep of certain hour, receive the influence of wireless environment variation and low-frequency clock precision, the timing synchronized relation between UE and serving BS will inevitably be affected.The TD-SCDMA system be a strictness time division duplex (be called for short, TDD) system, the transmission of its data is that different time-gap in same subframe carries out with receiving.For guaranteeing the performance of communication link, the timing between UE and base station is very important synchronously.Therefore, the primary Processing tasks of UE sleep awakening be exactly realize and the base station between timing recover synchronously, to guarantee paging monitoring and measuring reliability.
Application of the present invention--the TD-SCDMA system introduction is following.The frame structure sketch map of TD-SCDMA system shown in accompanying drawing 1.(be called for short, chip) speed is 1.28Mcps to the chip of this system, and each wireless sub-frame length is 5ms, i.e. 6400chip.Wherein, each subframe can be divided into 7 conventional time slot TS0～TS6 again, and two pilot time slots--descending pilot frequency time slot (be called for short, DwPTS) with uplink pilot time slot (be called for short, UpPTS), a main protection interval (abbreviating GP as).Further, the TS0 time slot is always distributed to down link, is used for bearing system broadcast channel and other possible down channel; TS1～TS6 time slot then is used to carry the uplink and downlink Traffic Channel.It is synchronous that UpPTS and DwPTS are used for setting up initial uplink and downlink respectively.The burst structure of DwPTS is shown in accompanying drawing 2, and (be called for short, SYNC_DL), its effect is cell ID and initial synchronisation foundation to comprise the descending synchronous code of a 64chip.Time slot TS0～TS6 structure is as shown in Figure 3, and length is 864chip, wherein comprises the data symbol of two segment lengths for 352chip, and a middle segment length is intermediate code (the abbreviating midamble as) training sequence of 144chip.The effect of this training sequence comprises cell ID, channel estimating and synchronous (comprising Frequency Synchronization) etc.
In the TD-SCDMA system, the method for salary distribution of the training sequence intermediate code of system is determined by network layer.According to the regulation of 3GPP TS 25.221, training sequence midamble allocation mode has three kinds: default allocation mode (default mode), public distributing mode (common mode) and assigned distributing mode by user (UEspecific mode).
When training sequence midamble allocation mode is default mode; System will be according to the code channel that the user distributed of standard code; The pairing movement training sequence information distribution of establishing criteria is given each user; When certain targeted customer activated a plurality of shift sequence, the power of each training sequence displacement was suitable with the gross power of corresponding each code channel.Under the acquiescence mode, each user and midamble displacement corresponding relation is shown in accompanying drawing 4 in the conventional time slot.
Each midamble displacement is to extend from the basic midamble cycle that intercepting obtains the long sequence that forms.The length L of the long sequence m that utilizes the basic midamble cycle to extend to form is confirmed by following formula:
L＝Lm+(K-1)W
Wherein,
The length of Lm:midamble is fixed as 144 in the TD-SCDMA system;
K: the maximum number of available midamble, i.e. maximum number of user in this time slot;
W: the window of describing the wireless channel impulse response is long, is defined as
wherein
for rounding up;
With TS0 is example, K=8, W=16, so L=256.The long sequence of then basic midamble after the cycle expansion is m, and wherein i element is m
i, i=1,2, L, L.
K midamble displacement m that the user is corresponding in the time slot
(k)I element obtain by following formula:
m
i (k)＝m
i+(Kcell-k)W，i＝1，2，L，L
m，k＝1，2，L，K
Confirmed the midamble displacement that each user is corresponding, merged the training sequence in promptly finally being transmitted through phase modulated and contraposition.
In the prior art, regularly restoration methods is following synchronously for sleep awakening under the typical UE idle pulley:
1, before UE sleeps under the idle pulley, calculates the time point that next PICH arrives in advance;
2, UE before the PICH subframe arrives during the stablefNum+syncfNum sub-frame from sleep awakening; Wherein stablefNum is that device is stablized required number of sub frames, and syncfNum regularly recovers required number of sub frames synchronously, and stablefNum and syncfNum are normally predefined according to emulation and measured result;
3, it is stable that UE accomplishes device in the stablefNum sub-frame time;
4, after device is stable, the syncfNum sub-frame of PICH subframe before arriving, UE receives the midamble or the SYNC_DL of the TS0 time slot of each sub-frame, and matees with the beacon channel midamble displacement or the SYNC_DL of local reconstruct;
5, UE finds regularly synchronous points according to matching result, realizes recovering synchronously with the timing of base station;
6, UE receives PICH, parses PICH information;
7, UE measures according to each subdistrict beaconing channel RSCP of measurement control order service implementation sub-district dominant frequency point and each the descending time slot ISCP measurement of Serving cell dominant frequency point.
Though the method for prior art can solve the UE problem that sleep awakening regularly recovers synchronously under idle pulley, but still has weak point:
Therefore the overlong time that the synchronous recovery technology scheme of existing timing is regularly recovered synchronously, can cause the UE low-power consumption operating time to shorten, thereby influences the power saving effect of UE.
1, prior art has only used among TS0 midamble or the SYNC_DL one to realize regularly synchronously as data sample, therefore at its employed the half the of amount of available data that data in synchronization quantity not sufficient system provides that carry out regularly of each subframe.
By sleeping under the aforementioned UE idle pulley and waking workflow up and can know, in the unit paging cycle, the operating time of UE is:
Device stabilization time+timing algnment recovery time+PICH listening period+resident frequency Measuring Time+pilot frequency point Measuring Time, unit is a subframe; Wherein, device is stable, PICH monitors, each need take for 1 sub-frame time to the single-frequency point measurement usually;
For obtaining desirable Power Cutback effect, existing scheme is compressed to the timing algnment recovery time usually.Yet existing regularly recovery scheme is when the data use amount is not enough synchronously, and what cause that said compression brings is that undesirable, the PICH that regularly recovers synchronously monitors failure, measures problems such as inaccurate.General; Existing scheme regularly algnment recovery time needs 4 subframes can guarantee that UE signal service quality is in the synchronous restorability of the timing of sensitivity position at least; It is nearly 50% that said timing corresponding power consumption expense lock in time accounts for UE idle mode operation time overall overhead, suppressed the Power Cutback effect of battery saving mode to a great extent.
2, be subject to the routine cognition of the synchronous recovery of the preceding necessary completion timing of monitoring PICH arrival, fail to make full use of type beacon channel characteristic of PICH channel, regular synchronization scheme remains high to the demand of lock in time all the time
In sum; Prior art is owing to fail to make full use of and can be used for regularly synchronously data recovered information; Therefore; When realizing that the UE sleep awakening regularly recovers synchronously, will inevitably cause need be longer the timing algnment recovery time obtain enough data volumes accomplishing regularly synchronous recovery, thereby suppressed the Power Cutback effect of UE.
Summary of the invention
In view of this, the present invention provides the synchronous restoration methods of timing that mobile terminal sleeping wakes up in a kind of TD-SCDMA system, has the problems referred to above to solve in the prior art.
Technical scheme of the present invention is:
1, before UE sleeps under the idle pulley, calculates the time point that next PICH arrives in advance;
2, UE triggered sleep awakening during
sub-frame before the PICH subframe arrives;
Wherein, StablefNum is that device is stablized required number of sub frames; SyncfNum uses TS0 midamble or SYNC_DL data before the PICH subframe arrives, to accomplish separately regularly to recover required subframe sample number synchronously; StablefNum and syncfNum are normally predefined according to actual measurement and simulated effect, and
is for rounding up;
3, it is stable that UE accomplishes device in the stablefNum sub-frame time;
4, UE after device is stable, PICH subframe
sub-frame before arriving; Receive TS0 time slot intermediate code midamble that each subframe carries regularly the synchronism deviation protection and descending synchronous code SYNC_DL as target sequence, be shifted with the beacon channel midamble of local reconstruct respectively and SYNC_DL matees;
5, in the PICH subframe, UE based on high-speed a/d the complete reception of sampling carry regularly PICH time slot, TS0 midamble, the SYNC_DL base band data of synchronism deviation protection;
With the sampling rate of 1.28MHz extract carry regularly synchronism deviation protection PICH time slot midamble, TS0 time slot midamble and SYNC_DL as target sequence, PICH midamble displacement, beacon channel midamble displacement, the SYNC_DL with local reconstruct matees respectively;
Wherein, Saidly carry regularly the synchronism deviation protection and be meant; Based on the data message of current timing sync bit receiving target sequence valid data and front and back SyncProt chip thereof, SyncProt is regularly a synchronism deviation protection number of chips, and its span is 8～32 chips;
6, all matching results are carried out contraposition and add up, UE finds regularly sync bit according to accumulation result, realizes recovering synchronously with the timing of base station;
7, UE parses PICH information from the PICH subframe that receives, and UE measures according to each subdistrict beaconing channel RSCP of measurement control order service implementation sub-district dominant frequency point and each the descending time slot ISCP measurement of Serving cell dominant frequency point then.
Preferably, said matching process is: begin from the reception starting point of target sequence that to implement SyncProt * 2+1 point slip relevant with the corresponding training sequence of local reconstruct, obtain SyncProt * 2+1 related power.
Preferably, said matching process is: the reception starting point from target sequence begins, and implements the Steiner channel estimating with the corresponding sequence length intercepting target sequence of local reconstruct with the corresponding sequence of local reconstruct, and SyncProt * 2+1 tap power before extracting;
Said UE finds regularly according to accumulation result, and sync bit further comprises:
The first related power of search surpasses the relevant position pos of PwrPeak * th in accumulation result, and pos promptly respectively receives the chip-level timing sync bit of data;
Wherein, said PwrPeak is the power peak in the accumulation result, and th is search thresholding, span 0.25～0.5;
With said chip-level timing sync bit is foundation, carries the synchronous protective PICH time slot midamble of timing below the chip-level, TS0 midamble, SYNC_DL with the sample rate intercepting of the high-speed a/d sampling identical with receiving the PICH sub-frame data;
The said synchronous protection of timing below the chip-level that carries is meant, based on the data message of said chip-level timing sync bit receiving target data and front and back SyncProtUC sampling point thereof;
Said SyncProtUC is the synchronous protection of timing below a chip-level number of samples, and its span is 2
N-1～2
N+1
With intercepting carry below the chip-level that regularly synchronous protective high speed base band data PICH time slot midamble, TS0 midamble, SYNC_DL sequence are as target sequence, the A/D sample rate with local reconstruct is 1.28 * 2 respectively
nThe PICH midamble displacement of MHz, beacon channel midamble displacement, SYNC_DL mate, and the matching result contraposition are added up;
Confirm the matching characteristic peak posUC in the accumulation result, obtaining the sync bit of timing below the final chip-level is pos * 2 of total receiving data information
n-SyncProtUC+posUC sampling point position;
Further, the sample rate of said high-speed a/d sampling is 1.28 * 2
nMHz, n are the integers more than or equal to 1.
Further, said local reconstruct A/D sample rate is 1.28 * 2
nThe reconstructing method of the training sequence information of MHz is after each chip data of basic training sequences information, to increase by 2
n-1 data 0 sampling point;
Preferably, said is 1.28 * 2 with the A/D sample rate of local reconstruct respectively
nThe concrete grammar that the PICH time slot midamble of MHz, TS0 midamble, SYNC_DL mate is: the A/D sample rate that begins with local reconstruct from the reception starting point of target sequence is 1.28 * 2
nIt is relevant that the corresponding training sequence of MHz is implemented SyncProtUC * 2+1 point slip, obtains SyncProtUC * 2+1 related power.
Preferably, said is 1.28 * 2 with the A/D sample rate of local reconstruct respectively
nThe concrete grammar that the PICH time slot midamble of MHz, TS0 midamble, SYNC_DL mate is: the reception starting point from target sequence begins; Corresponding sequence length intercepting target sequence with local reconstruct is implemented the Steiner channel estimating with the corresponding sequence of local reconstruct, and SyncProtUC * 2+1 tap power before extracting;
The timing that technical scheme of the present invention is fully integrated sleep awakening recovers required beacon channel midamble and SYNC_DL information synchronously; Overturn existing scheme and before the PICH subframe arrives, must accomplish the conventional idea of regularly recovering synchronously; Receive means through high-speed a/d sampled baseband data totally; Strive for that successfully regularly the time of recovery is cushioned synchronously; Simultaneously; Steady job task scheduling needs after the class beacon channel characteristic of comprehensive PICH channel and UE wake up, the information utilization of the TS0 midamble of newly-increased PICH subframe, SYNC_DL, PICH midamble under the prerequisite that does not promote the operating time overhead burden effectively replenishes regularly the data sample under the limited situation of algnment recovery time; Under the prerequisite that the equal number sample information is provided, reduce and regularly recover required absolute time resource synchronously, effectively promote and regularly recover efficient synchronously.
The synchronous restoration methods of timing of the present invention can obtain enough data samples and be used for realizing regularly recovering synchronously in the shorter time; Compared with prior art; The special-purpose frame number that regularly recovers synchronously of the present invention significantly reduces; Make portable terminal can obtain the longer length of one's sleep, effectively reduced power consumption of mobile terminals.
Description of drawings
Accompanying drawing 1 is a TD-SCDMA system subframe structure
Accompanying drawing 2 is burst structure of DwPTS
Accompanying drawing 3 is the conventional structure of time slot of TD-SCDMA
When accompanying drawing 4 is maximum number of user 8, the midamble displacement that each user is corresponding
Accompanying drawing 5 is process charts of the synchronous restoration methods of timing of sleep awakening of the present invention
Accompanying drawing 6 is to seek the regularly flow chart of sync bit in the inventive method
Accompanying drawing 7 is regularly synchronous restoration methods sleep-awake sequential charts of prior art sleep awakening under the same terms of the specific embodiment of the invention
Accompanying drawing 8 is the regularly synchronous restoration methods sleep-awake sequential charts of the sleep awakening of the specific embodiment of the invention
Embodiment
For clearly demonstrating technical scheme of the present invention, provide preferred embodiment below and be described with reference to the accompanying drawings.
Specific embodiment 1
Below, describing in conjunction with the specific embodiment of accompanying drawing technical scheme of the present invention, the overall procedure of present embodiment is shown in accompanying drawing 5:
1, before UE sleeps under the idle pulley, calculates the time point that next PICH arrives in advance; Subsequently, UE gets into sleep state;
2, UE before the PICH subframe arrives during
sub-frame from sleep awakening;
Wherein, StablefNum is that device is stablized required number of sub frames; SyncfNum uses TS0 midamble or SYNC_DL data before the PICH subframe arrives, to accomplish separately regularly to recover required number of sub frames synchronously; StablefNum and syncfNum are normally predefined according to simulation result, and
is for rounding up;
In the present embodiment, stablefNum=1, syncfNum=5;
3, it is stable that UE accomplishes device in the stablefNum sub-frame time;
4, UE after device is stable, PICH subframe
sub-frame before arriving; Receive TS0 time slot midamble that each subframe carries regularly the synchronism deviation protection and descending synchronous code SYNC_DL as target sequence, be shifted with the beacon channel midamble of local reconstruct respectively and SYNC_DL matees;
Wherein, Saidly carry regularly the synchronism deviation protection and be meant; Based on the data message of current timing sync bit receiving target sequence valid data and front and back SyncProt chip thereof, SyncProt is regularly a synchronism deviation protection number of chips, and its span is 8～32 chips; SyncProt=16 in this specific embodiment;
In the present embodiment; SyncfNum=5,
so this step only sub-frame before the PICH subframe arrives are carried out;
401, after device is stable, PICH subframe
each sub-frame before arriving, UE receives the TS0 time slot midamble that carries regularly synchronism deviation protection and SYNC_DL as target sequence;
In the present embodiment, TS0 time slot midamble refers to the 17th～144 chip content among the complete TS0 time slot midamble;
402, the TS0 midamble of every reception one sub-frame, SyncProt * slip of 2+1 point is relevant, obtains SyncProt * 2+1 related power with local reconstruct beacon channel midamble displacement enforcement with this TS0 midamble.
In the present embodiment, be 16 * 2+1=33 time, obtain 33 related powers, i.e. matching results the TS0 midamble associated numbers of times of each subframe;
403, the SYNC_DL of every reception one sub-frame, it is relevant that this SYNC_DL and local reconstruct SYNC_DL are implemented SyncProt * 2+1 point slip, obtains SyncProt * 2+1 related power;
In the present embodiment, be 16 * 2+1=33 time, obtain 33 related powers, i.e. matching results the SYNC_DL associated numbers of times of each subframe;
5, in the PICH subframe; UE based on high-speed a/d the complete reception of sampling carry regularly PICH time slot midamble, TS0 midamble, the SYNC_DL base band data of synchronism deviation protection; With the sampling rate of 1.28MHz extract carry regularly synchronism deviation protection PICH time slot midamble, TS0 time slot midamble and SYNC_DL as target sequence, PICH midamble displacement, beacon channel midamble displacement, the SYNC_DL with local reconstruct matees respectively;
Wherein, Saidly carry regularly the synchronism deviation protection and be meant; Based on the data message of current timing sync bit receiving target sequence valid data and front and back SyncProt chip thereof, SyncProt is regularly a synchronism deviation protection number of chips, and its span is 8～32 chips; SyncProt=16 in the present embodiment;
501, in the PICH subframe, with 1.28 * 2
nThe AD sample rate of MHz receives PICH time slot midamble, TS0 midamble, the SYNC_DL that carries regularly synchronism deviation protection;
Wherein n is the integer more than or equal to 1, in the present embodiment, and n=2;
In the present embodiment, PICH time slot midamble refers to the 17th～144 chip content among the complete PICH time slot midamble, and TS0 midamble refers to the 17th～144 chip content among the complete TS0 time slot midamble;
502, receive the initial sampling point of data certainly and begin, extract with the 1.28MHz sample rate and carry the regularly TS0 midamble of synchronism deviation protection;
503, SyncProt * slip of 2+1 point is relevant, obtains SyncProt * 2+1 related power with local reconstruct beacon channel midamble displacement enforcement with this TS0 midamble.
In the present embodiment, be 16 * 2+1=33 time, obtain 33 related powers, i.e. matching results the TS0 midamble associated numbers of times of PICH subframe;
504, receive the initial sampling point of data certainly and begin, extract with the 1.28MHz sample rate and carry the regularly SYND_DL of synchronism deviation protection;
505, it is relevant this SYND_DL and local reconstruct SYND_DL to be implemented SyncProt * 2+1 point slip, obtains SyncProt * 2+1 related power.
In the present embodiment, be 16 * 2+1=33 time, obtain 33 related powers, i.e. matching results the SYND_DL associated numbers of times of PICH subframe;
506, receive the initial sampling point of data certainly and begin, extract with the 1.28MHz sample rate and carry the regularly PICH time slot midamble of synchronism deviation protection;
507, SyncProt * slip of 2+1 point is relevant, obtains SyncProt * 2+1 related power with local reconstruct PICH time slot midamble displacement enforcement with this PICH time slot midamble.
In the present embodiment, be 16 * 2+1=33 time, obtain 33 related powers, i.e. matching results the PICH time slot midamble associated numbers of times of each subframe;
6, matching result is carried out contraposition and add up, UE finds regularly sync bit according to accumulation result, realizes recovering synchronously with the timing of base station, and the flow process of this step is shown in accompanying drawing 6;
601, the related power of each training sequence of acquisition in step 4 and 5 being carried out contraposition adds up;
Said contraposition adds up and is meant; The related power that the first time of each training sequence that obtains is relevant carries out addition, obtains first accumulation result, and the related power that the second time of each training sequence that obtains is relevant carries out addition; Obtain second accumulation result; By that analogy, carry out addition, obtain last accumulation result up to the last relevant related power of each training sequence that will obtain;
602, the first related power of search is above the relevant position pos of PwrPeak * th in accumulation result, and pos promptly respectively receives the chip-level timing sync bit of data;
Wherein, said PwrPeak is the power peak in the accumulation result, and th is search thresholding, span 0.25～0.5; The th value is 1/3 in the present embodiment;
603, be foundation with said chip-level timing sync bit, with 1.28 * 2
nThe synchronous protective PICH time slot midamble of timing below the chip-level, TS0midamble, SYNC_DL are carried in the A/D sample rate intercepting of MHz;
The said synchronous protection of timing below the chip-level that carries is meant, based on the data message of said chip-level timing sync bit receiving target data and front and back SyncProtUC sampling point thereof; Wherein, SyncProtUC is the synchronous protection of timing below a chip-level number of samples, and span is 2
N-1～2
N+1In the present embodiment, n=2, SyncProtUC=2
n=4;
604, with intercepting carry below the chip-level that regularly synchronous protective high speed base band data PICH time slot midamble, TS0 midamble, SYNC_DL sequence are as target sequence, the A/D sample rate with local reconstruct is 1.28 * 2 respectively
nIt is relevant that the PICH midamble displacement of MHz, beacon channel midamble displacement, SYNC_DL implement SyncProtUC * 2+1 point slip, can obtain SyncProtUC * 2+1 related power after each sequence is relevant, and the related power contraposition is added up;
Said local reconstruct A/D sample rate is 1.28 * 2
nThe reconstructing method of the training sequence information of MHz is after each chip data of basic training sequences information, to increase by 2
n-1 data 0 sampling point;
Identical in the said accumulation method and 601;
In the present embodiment, each target sequence associative operation number of times is 4 * 2+1=9 time, can obtain 9 related power values, the related power value of PICH time slot midamble, TS0 midamble, SYNC_DL is carried out contraposition add up, and can obtain 9 accumulation results;
605, confirm related power peak posUC in the accumulation result, obtaining below the final chip-level regularly, sync bit is pos * 2 of total receiving data information
n-SyncProtUC+posUC sampling point position;
606, UE realizes regularly recovering synchronously with the base station according to the timing sync bit of confirming;
7, UE parses PICH information from the PICH time slot, and UE measures according to each subdistrict beaconing channel RSCP of measurement control order service implementation sub-district dominant frequency point and each the descending time slot ISCP measurement of Serving cell dominant frequency point then.
Specific embodiment 2
Be another specific embodiment of technical scheme of the present invention below:
Step 1～3 are identical with specific embodiment 1;
4, UE after device is stable, PICH subframe
sub-frame before arriving; Receive TS0 time slot intermediate code midamble that each subframe carries regularly the synchronism deviation protection and descending synchronous code SYNC_DL as target sequence, be shifted with the beacon channel midamble of local reconstruct respectively and SYNC_DL matees;
Wherein, Saidly carry regularly the synchronism deviation protection and be meant; Based on the data message of current timing sync bit receiving target sequence valid data and front and back SyncProt chip thereof, SyncProt is regularly a synchronism deviation protection number of chips, and its span is 8～32 chips; SyncProt=16 in this specific embodiment;
401, after device is stable, PICH subframe
each sub-frame before arriving, UE receives the TS0 time slot midamble that carries regularly synchronism deviation protection and SYNC_DL as target sequence;
In the present embodiment, TS0 midamble refers to the 17th～144 chip content among the complete TS0 time slot midamble;
402, the TS0 midamble of every reception one sub-frame; This TS0 midamble of beacon channel midamble displacement length intercepting with local reconstruct; And implement the Steiner channel estimating, and extract preceding 2 * SyncProt+1 tap power with local reconstruct beacon channel midamble displacement;
In the present embodiment, can extract the TS0 midamble of each subframe and to obtain 33 tap power, i.e. matching results;
403, the SYNC_DL of every reception one sub-frame with this SYNC_DL of SYNC_DL length intercepting of local reconstruct, and implements the Steiner channel estimating with local reconstruct SYNC_DL, and SyncProt * 2+1 tap power before extracting;
In the present embodiment, can extract the SYNC_DL of each subframe and to obtain 33 tap power, i.e. matching results;
5, in the PICH subframe; UE based on high-speed a/d the complete reception of sampling carry regularly PICH time slot midamble, TS0 midamble, the SYNC_DL base band data of synchronism deviation protection; With the sampling rate of 1.28MHz extract carry regularly synchronism deviation protection PICH time slot midamble, TS0 time slot midamble and SYNC_DL as target sequence, PICH midamble displacement, beacon channel midamble displacement, the SYNC_DL with local reconstruct matees respectively;
Wherein, Saidly carry regularly the synchronism deviation protection and be meant; Based on the data message of current timing sync bit receiving target sequence valid data and front and back SyncProt chip thereof, SyncProt is regularly a synchronism deviation protection number of chips, and its span is 8～32 chips; SyncProt=16 in the present embodiment;
501, in the PICH subframe, with 1.28 * 2
nThe AD sample rate of MHz receives PICH time slot, TS0 midamble, the SYNC_DL that carries regularly synchronism deviation protection;
In the present embodiment, PICH time slot midamble refers to the 17th～144 chip content among the complete PICH time slot midamble, and TS0 midamble refers to the 17th～144 chip content among the complete TS0 time slot midamble;
Wherein n is the integer more than or equal to 1, in the present embodiment, and n=2;
502, receive the initial sampling point of data certainly and begin, extract with the 1.28MHz sample rate and carry the regularly TS0 midamble of synchronism deviation protection;
503,, and implement the Steiner channel estimating with local reconstruct beacon channel midamble displacement with this TS0 midamble of beacon channel midamble length intercepting of local reconstruct, and SyncProt * 2+1 tap power before extracting;
In the present embodiment, can extract acquisition 33 tap power, i.e. matching results to PICH subframe TS0 midamble;
504, receive the initial sampling point of data certainly and begin, extract with the 1.28MHz sample rate and carry the regularly SYND_DL of synchronism deviation protection;
505,, and implement the Steiner channel estimating with local reconstruct SYND_DL with this SYND_DL of SYND_DL length intercepting of local reconstruct, and SyncProt * 2+1 tap power before extracting;
In the present embodiment, can extract the SYND_DL of PICH subframe and to obtain 33 tap power, i.e. matching results;
506, receive the initial sampling point of data certainly and begin, extract with the 1.28MHz sample rate and carry the regularly PICH time slot midamble of synchronism deviation protection;
507, implement the Steiner channel estimating with this PICH time slot of the PICH midamble of local reconstruct displacement length intercepting midamble, and with local reconstruct PICH midamble displacement, and SyncProt * 2+1 tap power before extracting;
In the present embodiment, can extract acquisition 33 tap power, i.e. matching results to PICH time slot midamble;
6, all matching results are carried out contraposition and add up, UE finds regularly sync bit according to accumulation result, realizes recovering synchronously with the timing of base station;
601, the tap power of each training sequence of acquisition in step 4 and 5 being carried out contraposition adds up;
Said contraposition adds up and is meant; First tap power of each training sequence that obtains is carried out addition, obtain first accumulation result, second tap power of each training sequence that obtains is carried out addition; Obtain second accumulation result; By that analogy, carry out addition, obtain last accumulation result up to last tap power of each training sequence that will obtain;
602～603 is identical with specific embodiment 1
604, with intercepting carry below the chip-level regularly synchronous protective high speed base band data PICH time slot midamble, TS0 midamble, SYNC_DL sequence as target sequence, the A/D sample rate with the local reconstruct of correspondence is 1.28 * 2 respectively
nThe corresponding target sequence of the corresponding sequence length intercepting of MHz, and be 1.28 * 2 with the A/D sample rate of local reconstruct respectively
nThe PICH midamble of MHz displacement, beacon channel midamble displacement, SYNC_DL implement the Steiner channel estimating, extract preceding SyncProtUC * 2+1 the tap power that each sequence channel is estimated respectively, and the tap power contraposition of each sequence is added up;
Said local reconstruct A/D sample rate is 1.28 * 2
nThe reconstructing method of the training sequence information of MHz is after each chip data of basic training sequences information, to increase by 2
n-1 data 0 sampling point;
Said contraposition accumulation method is identical with 601;
In the present embodiment, each target sequence can obtain 9 tap performance numbers, the tap performance number of PICH time slot midamble, TS0 midamble, SYNC_DL is carried out contraposition add up, and can obtain 9 accumulation results.
605 confirm the tap power peak position posUC in the accumulation result, and obtaining the sync bit of timing below the final chip-level is pos * 2 of total receiving data information
n-SyncProtUC+posUC sampling point position;
606, UE realizes regularly recovering synchronously with the base station according to the timing sync bit of confirming;
Step 7 is identical with specific embodiment 1.
For the power consumption expense advantage of the synchronous restoration methods of timing that further specifies the conventional relatively sleep awakening of the present invention, be example with said specific embodiment 1,2, provide conventional scheme and terminal sleep of the present invention/wake the sequential chart contrast up, referring to Fig. 7, Fig. 8.
The sleep-awake sequential chart of comparison diagram 7, Fig. 8 can know, in this specific embodiment 1,2, the required timing of the synchronous recovery scheme of the timing of terminal wake-up of the present invention recovers the special-purpose time synchronously and is merely 20% of conventional scheme, possesses significant Power Cutback advantage.
The above is merely the preferred embodiments of the present invention, 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, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (8)
1. the synchronous restoration methods of timing that mobile terminal sleeping wakes up in the TD-SCDMA system is characterized in that:
Mobile terminal UE is after device is stable; Before Page Indication Channel PICH subframe arrives; Receive TS0 time slot intermediate code midamble that each subframe carries regularly the synchronism deviation protection and descending synchronous code SYNC_DL as target sequence, be shifted with the beacon channel midamble of local reconstruct respectively and SYNC_DL matees;
In the PICH subframe, UE based on high-speed a/d the complete reception of sampling carry regularly PICH time slot midamble, TS0 midamble, the SYNC_DL base band data of synchronism deviation protection;
With the sampling rate of 1.28MHz extract carry regularly synchronism deviation protection PICH time slot midamble, TS0 time slot midamble and SYNC_DL as target sequence, PICH midamble displacement, beacon channel midamble displacement, the SYNC_DL with local reconstruct matees respectively;
Wherein, Saidly carry regularly the synchronism deviation protection and be meant; Based on the data message of current timing sync bit receiving target sequence valid data and front and back SyncProt chip thereof, SyncProt is regularly a synchronism deviation protection number of chips, and its span is 8～32 chips;
Matching result is carried out contraposition add up, UE finds regularly sync bit according to accumulation result, realizes recovering synchronously with the timing of base station.
2. the synchronous restoration methods of timing that mobile terminal sleeping wakes up in a kind of TD-SCDMA according to claim 1 system; It is characterized in that; Said matching process is: the reception starting point from target sequence begins; It is relevant that the corresponding sequence of this target sequence and local reconstruct is implemented SyncProt * 2+1 point slip, obtains SyncProt * 2+1 related power.
3. the synchronous restoration methods of timing that mobile terminal sleeping wakes up in a kind of TD-SCDMA according to claim 1 system; It is characterized in that; Said matching process is: the reception starting point from target sequence begins; Corresponding sequence length intercepting target sequence with local reconstruct is implemented the Steiner channel estimating with the corresponding sequence of local reconstruct, and SyncProt * 2+1 tap power before extracting.
4. the synchronous restoration methods of timing that mobile terminal sleeping wakes up in a kind of TD-SCDMA according to claim 1 system is characterized in that, said UE finds regularly according to accumulation result that sync bit further comprises:
The first related power of search surpasses the relevant position pos of PwrPeak * th in accumulation result, and pos promptly respectively receives the chip-level timing sync bit of data;
Wherein, said PwrPeak is the power peak in the matching result after contraposition adds up, and th is search thresholding, span 0.25～0.5;
With pos is foundation, carries the synchronous protective PICH time slot midamble of timing below the chip-level, TS0midamble, SYNC_DL with the sample rate intercepting of the high-speed a/d sampling identical with receiving the PICH sub-frame data;
The said synchronous protection of timing below the chip-level that carries is meant, based on the data message of said chip-level timing sync bit receiving target data and front and back SyncProtUC sampling point thereof;
Said SyncProtUC is the synchronous protection of timing below a chip-level number of samples, and its span is 2
N-1～2
N+1
With intercepting carry below the chip-level that regularly synchronous protective high speed base band data PICH time slot midamble, TS0midamble, SYNC_DL sequence are as target sequence, the A/D sample rate with local reconstruct is 1.28 * 2 respectively
nThe PICH midamble displacement of MHz, beacon channel midamble displacement, SYNC_DL mate, and the matching result contraposition are added up;
Confirm the matching characteristic peak posUC in the matching result after contraposition adds up, obtaining the sync bit of timing below the final chip-level is pos * 2 of total receiving data information
n-SyncProtUC+posUC sampling point position; Wherein, said n is the integer more than or equal to 1.
5. the synchronous restoration methods of waking up according to mobile terminal sleeping in claim 1 or the 4 described a kind of TD-SCDMA systems of timing is characterized in that the sample rate of said high-speed a/d sampling is 1.28 * 2
nMHz, n are the integers more than or equal to 1.
6. the synchronous restoration methods of timing that mobile terminal sleeping wakes up in a kind of TD-SCDMA according to claim 4 system is characterized in that the A/D sample rate of said local reconstruct is 1.28 * 2
nThe reconstructing method of the training sequence of MHz is after each chip data of basic training sequences information, to increase by 2
n-1 data 0 sampling point.
7. the synchronous restoration methods of timing that mobile terminal sleeping wakes up in a kind of TD-SCDMA according to claim 4 system is characterized in that, said is 1.28 * 2 with the A/D sample rate of local reconstruct respectively
nThe concrete grammar that the PICH midamble of MHz displacement, beacon channel midamble displacement, SYNC_DL mate is: the A/D sample rate that begins with local reconstruct from the reception starting point of target sequence is 1.28 * 2
nIt is relevant that the corresponding training sequence of MHz is implemented SyncProtUC * 2+1 point slip, obtains SyncProtUC * 2+1 related power.
8. the synchronous restoration methods of timing that mobile terminal sleeping wakes up in a kind of TD-SCDMA according to claim 4 system is characterized in that, said is 1.28 * 2 with the A/D sample rate of local reconstruct respectively
nThe method that the PICH midamble displacement of MHz, beacon channel midamble displacement, SYNC_DL mate is: the reception starting point from target sequence begins; With the corresponding sequence length intercepting target sequence of local reconstruct, with the A/D sample rate of local reconstruct be 1.28 * 2
nThe corresponding training sequence of MHz is implemented the Steiner channel estimating, and SyncProtUC * 2+1 tap power before extracting.
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| CN102858001B (en) * | 2011-06-30 | 2016-03-30 | 联芯科技有限公司 | Page Indication Channel monitor method and terminal |
| CN103369644B (en) * | 2012-03-29 | 2018-08-28 | 马维尔国际有限公司 | Terminal awakening method and equipment |
| US9854516B2 (en) * | 2014-07-31 | 2017-12-26 | Texas Instruments Incorporated | Slot skipping techniques for reduced power consumption in time slotted channel hopping MAC protocol |
| CN106162843B (en) * | 2015-04-22 | 2019-04-05 | 展讯通信（上海）有限公司 | WCDMA mobile terminal cell synchronous method and device |
| CN109478913B (en) * | 2016-10-28 | 2022-08-30 | 惠州Tcl移动通信有限公司 | Downlink transmission method, node and user equipment based on beamforming |
| CN109548121B (en) * | 2017-09-22 | 2022-03-18 | 珠海市魅族科技有限公司 | Communication method and device of wireless local area network, access point equipment and site equipment |
| CN110012524B (en) * | 2018-01-05 | 2022-02-08 | 维沃移动通信有限公司 | Time-frequency synchronization method, network equipment and terminal |
| CN109041017B (en) * | 2018-08-24 | 2021-06-25 | 锐迪科（重庆）微电子科技有限公司 | Terminal sleep awakening synchronous recovery method and device |
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