CN101646231A - 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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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 informationrequired 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 mobile communication system, 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.Without any the information of UE under the independent idle pulley, it can only carry out addressing in the TD-SCDMA system, 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, described 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, described paging Class1 message bearing in paging channel (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 paging channel; The sub-district gravity treatment 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.
As seen, 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 the sub-district gravity treatment according to the measurement result decision according to paging snoop results decision.
Described paging monitoring and sub-district gravity treatment measurement task are normally periodically carried out according to high-rise designated time intervals, and described appointment execution cycle (paging cycle and measuring period, according to 3GPP TS 25.123, be the integral multiple of paging cycle measuring period) finish the average handling time of described 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, described 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.Described sleep pattern is defined as: when UE was in the idling conditions of no task, UE closed high-frequency work clock, peripheral Analog Baseband 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 described concluding time is a foundation with PICH time of advent usually, described ending method is for recovering the operating state of stable high frequency clock, peripheral Analog Baseband device, radio-frequency devices etc., and relevant operation is called sleep awakening.
Through after the sleep of certain hour, be subjected to 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 as follows.The frame structure schematic diagram of TD-SCDMA system as shown in Figure 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) and 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 as shown in Figure 2, (be called for short, SYNC_DL), its effect is that cell ID and initial synchronisation are set up to comprise the descending synchronous code of a 64chip.Time slot TS0～TS6 structure as shown in Figure 3, length is 864chip, wherein comprise two segment lengths and be the data symbol of 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 as shown in Figure 4 in the conventional time slot.
Each midamble displacement is to intercept extending the long sequence that forms from the basic midamble cycle to obtain.The length L of the long sequence m that utilizes the basic midamble cycle to extend to form is determined 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.
The midamble of k user's correspondence displacement m 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
Determined the midamble displacement of each user's correspondence, merged the training sequence in promptly finally being transmitted through phase modulated and contraposition.
In the prior art, regularly restoration methods is as follows 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 stablefNum+syncfNum subframe 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 finishes device in stablefNum sub-frame time;
4, after device is stable, syncfNum the subframe of PICH subframe before arriving, UE receives the midamble or the SYNC_DL of the TS0 time slot of each subframe, and is shifted with the beacon channel midamble of local reconstruct or SYNC_DL mates;
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 puts according to measurement control order service implementation sub-district dominant frequency that each subdistrict beaconing channel RSCP measures and the Serving cell dominant frequency is put each descending time slot ISCP and measured.
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 in its employed half of amount of available data that data in synchronization quantity not sufficient system provides of carrying out regularly of each subframe.
By sleeping under the aforementioned UE idle pulley and waking workflow up as can be known, 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 1 sub-frame time to the single-frequency point measurement usually;
For obtaining desirable Power Cutback effect, existing scheme is compressed at 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 described 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 the power consumption expense of described timing correspondence 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 monitor and must finish regularly recover synchronously conventional cognitive before PICH arrives, fail to make full use of the class beacon channel characteristic of PICH channel, regular synchronization scheme remains high all the time to the demand of lock in 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 finishing regularly synchronous recovery, thereby suppressed the Power Cutback effect of UE.
Summary of the invention
In view of this, the invention provides the synchronous restoration methods of timing that mobile terminal sleeping wakes up in a kind of TD-SCDMA system, have 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 is before the PICH subframe arrives
Trigger sleep awakening during individual subframe;
Wherein, stablefNum is that device is stablized required number of sub frames, syncfNum regularly recovers required subframe sample number synchronously for using TS0 midamble or SYNC_DL data to finish separately before the PICH subframe arrives, stablefNum and syncfNum are normally predefined according to actual measurement and simulated effect
For rounding up;
3, it is stable that UE finishes device in stablefNum sub-frame time;
4, UE after device is stable, the PICH subframe is before arriving
Individual subframe receives each subframe and carries regularly the TS0 time slot intermediate code midamble of synchronism deviation protection and descending synchronous code SYNC_DL as target sequence, and beacon channel midamble displacement and the SYNC_DL with local reconstruct mates respectively;
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;
Extract the PICH time slot midamble, the TS0 time slot midamble that carry regularly synchronism deviation protection and SYNC_DL as target sequence with the sampling rate of 1.28MHz, PICH midamble displacement, beacon channel midamble displacement, the SYNC_DL with local reconstruct mates respectively;
Wherein, describedly 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 puts according to measurement control order service implementation sub-district dominant frequency that each subdistrict beaconing channel RSCP measures and the Serving cell dominant frequency is put each descending time slot ISCP and measured then.
Preferably, described 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, described 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;
Described 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, described PwrPeak is the power peak in the accumulation result, and th is search thresholding, span 0.25～0.5;
With described 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 described following regularly synchronous protection of chip-level that carries is meant, based on the data message of described chip-level timing sync bit receiving target data and front and back SyncProtUC sampling point thereof;
Described SyncProtUC is the following regularly synchronous protection number of samples of chip-level, and its span is 2
N-1～2
N+1
Carry timing below the chip-level synchronous protective high speed base band data PICH time slot midamble, TS0 midamble, SYNC_DL sequence as target sequence with what intercept, 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;
Determine the matching characteristic peak posUC in the accumulation result, obtaining the following regularly sync bit of final chip-level is pos * 2 of total receiving data information
n-SyncProtUC+posUC sampling point position;
Further, the sample rate of described high-speed a/d sampling is 1.28 * 2
nMHz, n are the integers more than or equal to 1.
Further, described local reconstruct A/D sample rate is 1.28 * 2
nThe reconstructing method of the training sequence information of MHz is to increase by 2 after each chip data of basic training sequences information
n-1 data 0 sampling point;
Preferably, described is 1.28 * 2 with the A/D sample rate of local reconstruct respectively
nThe PICH time slot midamble of MHz, the concrete grammar that TS0 midamble, SYNC_DL mate are: 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, described is 1.28 * 2 with the A/D sample rate of local reconstruct respectively
nThe PICH time slot midamble of MHz, the concrete grammar that TS0 midamble, SYNC_DL mate are: 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 finish the conventional idea of regularly recovering synchronously, receive means by 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 TS0 midamble of newly-increased PICH subframe under the prerequisite that does not promote the operating time overhead burden, SYNC_DL, the information utilization of PICH midamble, effectively replenish 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 of each user's correspondence displacement
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.
Below, a specific embodiment to technical scheme of the present invention describes in conjunction with the accompanying drawings, the overall procedure of present embodiment as shown in Figure 5:
1, before UE sleeps under the idle pulley, calculates the time point that next PICH arrives in advance; Subsequently, UE enters sleep state;
2, UE is before the PICH subframe arrives
During individual subframe from sleep awakening;
Wherein, stablefNum is that device is stablized required number of sub frames, syncfNum regularly recovers required number of sub frames synchronously for using TS0 midamble or SYNC_DL data to finish separately before the PICH subframe arrives, stablefNum and syncfNum are normally predefined according to simulation result
For rounding up;
In the present embodiment, stablefNum=1, syncfNum=5;
3, it is stable that UE finishes device in stablefNum sub-frame time;
4, UE after device is stable, the PICH subframe is before arriving
Individual subframe receives each subframe and carries regularly the TS0 time slot midamble of synchronism deviation protection and descending synchronous code SYNC_DL as target sequence, and beacon channel midamble displacement and the SYNC_DL with local reconstruct mates respectively;
Wherein, describedly 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,
Therefore an only subframe execution before the PICH subframe arrives of this step;
401, after device is stable, the PICH subframe is before arriving
Each subframe, UE receives the TS0 time slot midamble carry 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 a subframe of every reception, 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 a subframe of every reception, 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, extract the PICH time slot midamble, the TS0 time slot midamble that carry regularly synchronism deviation protection and SYNC_DL as target sequence with the sampling rate of 1.28MHz, PICH midamble displacement, beacon channel midamble displacement, the SYNC_DL with local reconstruct mates respectively;
Wherein, describedly 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 as shown in Figure 6;
601, the related power of each training sequence of acquisition in step 4 and 5 being carried out contraposition adds up;
Described contraposition adds up and is meant, the relevant related power first time of each training sequence of obtaining is carried out addition, obtain first accumulation result, the relevant related power second time of each training sequence of obtaining is carried 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, described 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 described chip-level timing sync bit, with 1.28 * 2
nChip-level following regularly synchronous protective PICH time slot midamble, TS0midamble, SYNC_DL are carried in the A/D sample rate intercepting of MHz;
The described following regularly synchronous protection of chip-level that carries is meant, based on the data message of described chip-level timing sync bit receiving target data and front and back SyncProtUC sampling point thereof; Wherein, SyncProtUC is the following regularly synchronous protection number of samples of chip-level, and span is 2
N-1～2
N+1In the present embodiment, n=2, SyncProtUC=2
n=4;
What 604, will intercept carries the following timing of chip-level synchronous protective high speed base band data PICH time slot midamble, TS0 midamble, SYNC_DL sequence as target sequence, and 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;
Described local reconstruct A/D sample rate is 1.28 * 2
nThe reconstructing method of the training sequence information of MHz is to increase by 2 after each chip data of basic training sequences information
n-1 data 0 sampling point;
Identical in the described 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, determine related power peak posUC in the accumulation result, obtaining the following regularly sync bit of 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 determining;
7, UE parses PICH information from the PICH time slot, and UE puts according to measurement control order service implementation sub-district dominant frequency that each subdistrict beaconing channel RSCP measures and the Serving cell dominant frequency is put each descending time slot ISCP and measured then.
Be another specific embodiment of technical scheme of the present invention below:
4, UE after device is stable, the PICH subframe is before arriving
Individual subframe receives each subframe and carries regularly the TS0 time slot intermediate code midamble of synchronism deviation protection and descending synchronous code SYNC_DL as target sequence, and beacon channel midamble displacement and the SYNC_DL with local reconstruct mates respectively;
Wherein, describedly 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, the PICH subframe is before arriving
Each subframe, UE receives the TS0 time slot midamble carry 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 a subframe of every reception, beacon channel midamble displacement length with local reconstruct intercepts this TS0 midamble, 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 a subframe of every reception intercepts this SYNC_DL with the SYNC_DL length 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, extract the PICH time slot midamble, the TS0 time slot midamble that carry regularly synchronism deviation protection and SYNC_DL as target sequence with the sampling rate of 1.28MHz, PICH midamble displacement, beacon channel midamble displacement, the SYNC_DL with local reconstruct mates respectively;
Wherein, describedly 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, the beacon channel midamble length with local reconstruct intercepts this TS0 midamble, and implements the Steiner channel estimating with local reconstruct beacon channel 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 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, the SYND_DL length with local reconstruct intercepts this SYND_DL, and implements the Steiner channel estimating with local reconstruct SYND_DL, 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, the PICH midamble displacement length with local reconstruct intercepts this PICH time slot midamble, and implements the Steiner channel estimating 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;
Described contraposition adds up and is meant, first tap power of each training sequence of obtaining is carried out addition, obtain first accumulation result, second tap power of each training sequence of obtaining 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
What 604, will intercept carries chip-level following regularly synchronous protective high speed base band data PICH time slot midamble, TS0 midamble, SYNC_DL sequence as target sequence, and the A/D sample rate with the local reconstruct of correspondence is 1.28 * 2 respectively
nThe corresponding sequence length of MHz intercepts corresponding target sequence, and is 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;
Described local reconstruct A/D sample rate is 1.28 * 2
nThe reconstructing method of the training sequence information of MHz is to increase by 2 after each chip data of basic training sequences information
n-1 data 0 sampling point;
Described 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 determine the tap power peak position posUC in the accumulation result, and obtaining the following regularly sync bit of 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 determining;
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 described 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 as can be known, 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 only for 20% of conventional scheme, possesses significant Power Cutback advantage.
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 (8)
1, the synchronous restoration methods of timing that mobile terminal sleeping wakes up in a kind of TD-SCDMA system is characterized in that:
Mobile terminal UE is after device is stable, before Page Indication Channel PICH subframe arrives, receive each subframe and carry regularly the TS0 time slot intermediate code midamble of synchronism deviation protection and descending synchronous code SYNC_DL as target sequence, beacon channel midamble displacement and the SYNC_DL with local reconstruct mates respectively;
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;
Extract the PICH time slot midamble, the TS0 time slot midamble that carry regularly synchronism deviation protection and SYNC_DL as target sequence with the sampling rate of 1.28MHz, PICH midamble displacement, beacon channel midamble displacement, the SYNC_DL with local reconstruct mates respectively;
Wherein, describedly 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, described 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, described 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, described 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, described 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 described following regularly synchronous protection Data Receiving of chip-level of carrying is defined as based on the described chip-level data sequence of sync bit receiving target data and front and back SyncProtUC sampling point thereof regularly;
Described SyncProtUC is the following regularly synchronous protection number of samples of chip-level, and its span is 2
N-1～2
N+1
Carry timing below the chip-level synchronous protective high speed base band data PICH time slot midamble, TS0 midamble, SYNC_DL sequence as target sequence with what intercept, 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;
Determine the matching characteristic peak posUC in the matching result after contraposition adds up, obtaining the following regularly sync bit of final chip-level is pos * 2 of total receiving data information
n-SyncProtUC+posUC sampling point position.
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 described 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 described local reconstruct is 1.28 * 2
nThe reconstructing method of the training sequence of MHz is to increase by 2 after each chip data of basic training sequences information
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, described 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, described 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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