CN101938826B - Uplink synchronization control method and device for long term evolution system - Google Patents

Abstract

The invention provides an uplink synchronization control method for a long term evolution system, which comprises the following steps of: calculating a time adjustment value according to an uplink channel estimation sequence; judging whether the time adjustment value exceeds an adjustment window or not; generating a time adjustment instruction according to the judging result; and transmitting an uplink signal according to the time adjustment instruction. The invention also provides an uplink synchronization control device for the long term evolution system, which comprises a calculating module, a judging module, an instruction generating module and a transmitting module. The uplink synchronization control method and device solve the problem of poorer uplink synchronization control effect when the time adjustment value exceeds the adjustment window in relevant technologies; and furthermore, no matter whether the time adjustment value exceeds the adjustment window or not, the higher precision control of uplink synchronization is realized.

Description

The ascending synchronous control method and the device that are used for long evolving system

Technical field

The present invention relates to the communications field, in particular to a kind of ascending synchronous control method for long evolving system and device.

Background technology

In 3GPP LTE (3rd Generation Partnership Project Long TermEvolution, third generation partner program Long Term Evolution) communication protocol, be 16T to the required precision of uplink synchronous _s, be about 0.52 μ s, wherein T _s=1/ (5000 * 2048) second.

For other regular traffic situation of nonrandom access, the time is adjusted the time of having carried 6 bits in MAC Control Element and adjusts instruction (Timing Advance Command) T _A, span is T _A=0,1,2 ..., 63, be used to refer to respect to current absolute adjustment amount N _{TA, old}Relative adjustment amount, new absolute adjustment amount is N _{TA, new}=N _{TA, old}+ (T _A-31) * 16, unit is T _sBy following formula as can be known, the time is adjusted time adjusting range corresponding to instruction (can be described as and adjust window) and should be [31,32], the 16T of unit _s

patent " a kind of TD-SCDMA system in ascending synchronous control method and device " (application number: CN200610113787.8, publication number: a kind of ascending synchronous control method for the TD-SCDMA system is provided CN101166057), the simultaneous bias order word that the method produces according to the channel impulse response of the best time slot of signal by the terminal response base station, be each ascending time slot lead setup time according to the Timing Advance of first ascending time slot, in addition, at HSDPA (High Speed Downlink Packages Access, the high speed downlink packet access) in business, the present invention is by the simultaneous bias order word of terminal response base station transmission, the up Timing Advance of configuration following special physical channel DPCH (Dedicated Physical Channel) or shared information channel HS-SICH (Shared Information Channel forHS-DSCH).

In realizing process of the present invention, the inventor finds that the ascending synchronous control method in correlation technique does not only exceed situation about adjusting in window to the time adjusted value and processes, ignored and to have had the abnormal conditions that exceed when adjusting window, also can't carry out special processing to these abnormal conditions, to control effect relatively poor thereby cause exceeding when adjusting window uplink synchronous at the time adjusted value.

Summary of the invention

The present invention aims to provide a kind of ascending synchronous control method for long evolving system and device, the ascending synchronous control method that can solve in correlation technique is only processed the situation that the time adjusted value does not exceed in the adjustment window, ignored and to have had the abnormal conditions that exceed when adjusting window, also can't carry out special processing to these abnormal conditions, thereby cause the relatively poor problem of uplink synchronous control effect when the time adjusted value exceeds the adjustment window.

In an embodiment of the present invention, provide a kind of ascending synchronous control method for long evolving system, comprised the following steps: calculate the time adjusted value according to the uplink channel estimation sequence; Whether the time adjusted value of judgement exceeds the adjustment window; According to the adjustment instruction of judged result rise time; According to time adjustment instruction issue upward signal.

Preferably, in above-mentioned ascending synchronous control method, calculate the time adjusted value according to the uplink channel estimation sequence and specifically comprise: calculate up time offset estimation value according to the uplink channel estimation sequence; Cyclic prefix type during setup times adjustment aim value according to up channel; Calculate the time adjusted value according to up time offset estimation value and desired value.

Preferably, in above-mentioned ascending synchronous control method, adjust instruction according to the judged result rise time and specifically comprise: if the time adjusted value exceeds the adjustment window, compare exit window number of times and threshold value; Magnitude relationship rise time adjustment instruction according to exit window number of times and threshold value.

Preferably, in above-mentioned ascending synchronous control method, adjust instruction according to the magnitude relationship rise time of exit window number of times and threshold value and specifically comprise: if the exit window number of times less than or equal to threshold value, compares time adjusted value and the end points of adjusting window; Magnitude relationship rise time adjustment instruction according to time adjusted value and end points; The exit window number of times is set adds one.

Preferably, in above-mentioned ascending synchronous control method, adjust instruction according to magnitude relationship rise time of time adjusted value and end points and specifically comprise: if the time adjusted value less than the lower limit end points of adjusting window, setup times is adjusted instruction for lagging behind the very first time.

Preferably, in above-mentioned ascending synchronous control method, adjust instruction according to magnitude relationship rise time of time adjusted value and end points and specifically comprise: if the time adjusted value greater than the upper limit end points of adjusting window, it is leading the second time that setup times is adjusted instruction.

Preferably, in above-mentioned ascending synchronous control method, adjust instruction according to magnitude relationship rise time of exit window number of times and threshold value and specifically comprise: if the exit window number of times greater than threshold value, it is invalid that setup times is adjusted instruction, perhaps is adjusted value not; With the zero clearing of exit window number of times.

Preferably, in above-mentioned ascending synchronous control method, adjusting instruction according to the judged result rise time specifically comprises: if the time adjusted value is greater than the upper limit end points of adjusting window, perhaps the exit window number of times is greater than threshold value, according to the adjusted value rise time time adjustment instruction of a upper moment and current time; With the zero clearing of exit window number of times.

Preferably, in above-mentioned ascending synchronous control method, adjusting instruction according to the judged result rise time specifically comprises: if the time adjusted value is less than the lower limit end points of adjusting window, perhaps the exit window number of times is greater than threshold value, according to the adjusted value rise time time adjustment instruction of a upper moment and current time; With the zero clearing of exit window number of times.

Preferably, in above-mentioned ascending synchronous control method, adjusted instruction according to the judged result rise time and specifically comprise: if the exit window number of times is less than or equal to threshold value, according to the adjusted value rise time time adjustment instruction of a upper moment and current time; With the zero clearing of exit window number of times.

Preferably, in above-mentioned ascending synchronous control method, adjusted instruction according to the judged result rise time and specifically comprise: if the time adjusted value does not exceed the adjustment window, according to the adjusted value rise time time adjustment instruction of a upper moment and current time; With the zero clearing of exit window number of times.

On the other hand, in an embodiment of the present invention, also provide a kind of uplink synchronous control device for long evolving system, having comprised: computing module is used for calculating the time adjusted value according to the uplink channel estimation sequence; Judge module is used for judging whether the time adjusted value exceeds the adjustment window; The instruction generation module is used for adjusting instruction according to the judged result rise time; Transmitter module is used for adjusting the instruction issue upward signal according to the time.

at first above-described embodiment calculates the time adjusted value according to the uplink channel estimation sequence, then whether the time adjusted value being exceeded the adjustment window judges, and generate different time adjustment instructions according to different judged results, to adjust the moment of terminal to transmit uplink signal, so having overcome the ascending synchronous control method in the correlation technique only processes the situation that the time adjusted value does not exceed in the adjustment window, ignored and to have had the abnormal conditions that exceed when adjusting window, also can't carry out special processing to these abnormal conditions, control the relatively poor problem of effect and cause exceeding when adjusting window uplink synchronous at the time adjusted value, because above-described embodiment carries out abnormality processing to exceeding adjustment window situation, and then no matter adjust window in the situation that whether the time adjusted value exceeds, all realized the degree of precision of uplink synchronous is controlled.

Description of drawings

Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:

Fig. 1 shows the flow chart according to the ascending synchronous control method of the first embodiment of the present invention;

Fig. 2 shows the flow chart of ascending synchronous control method according to a second embodiment of the present invention;

Fig. 3 shows the flow chart of the ascending synchronous control method of a third embodiment in accordance with the invention;

Fig. 4 shows the flow chart of the ascending synchronous control method of a fourth embodiment in accordance with the invention;

Fig. 5 shows the flow chart of ascending synchronous control method according to a fifth embodiment of the invention;

Fig. 6 shows the structure chart of uplink synchronous control device according to a sixth embodiment of the invention.

Embodiment

Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.

Fig. 1 shows the flow chart according to the ascending synchronous control method of the first embodiment of the present invention, and the method comprises the following steps:

Step S101 calculates the time adjusted value according to the uplink channel estimation sequence;

Step S102, whether the time adjusted value of judgement exceeds the adjustment window;

Step S103 is according to the adjustment instruction of judged result rise time;

Step S104 is according to time adjustment instruction issue upward signal.

at first above-described embodiment calculates the time adjusted value according to the uplink channel estimation sequence, then whether the time adjusted value being exceeded the adjustment window judges, and generate different time adjustment instructions according to different judged results, terminal adjusts according to this time the moment that transmit uplink signal is adjusted in instruction, so having overcome the ascending synchronous control method in the correlation technique only processes the situation that the time adjusted value does not exceed in the adjustment window, ignored and to have had the abnormal conditions that exceed when adjusting window, also can't carry out special processing to these abnormal conditions, control the relatively poor problem of effect and cause exceeding when adjusting window uplink synchronous at the time adjusted value, because above-described embodiment carries out abnormality processing to exceeding adjustment window situation, and then no matter adjust window in the situation that whether the time adjusted value exceeds, all realized the degree of precision of uplink synchronous is controlled.

Preferably, in above-mentioned ascending synchronous control method, step S101 specifically comprises: according to the uplink channel estimation sequence

Calculate up time offset estimation value n _TA ^(u)Cyclic prefix type during setup times adjustment aim value T according to up channel _TAAccording to up time offset estimation value n _TA ^(u)With desired value T _TACalculate time adjusted value S _TA ^(u)

For user u, in the uplink channel estimation window, position corresponding to the peak-peak of time domain channel estimating power is corresponding to up time offset estimation value n _max ^(u), be expressed as with formula:

$n_{\max }^{\left(u\right)}=\underset{n\∈L_W^{\left(u\right)}}{\arg }\left\{\max \right[{\tilde{h}}^{\left(u\right)}\left(n\right)\left]\right\},---\left(1\right)$

L wherein _W ^(u)Expression time domain channel estimating window is long,

The power sequence of expression uplink channel estimation can be the channel estimating power sequence of single antenna port, single time slot, also can be channel estimating power sequence arithmetic average or the weighted average of two time slots in many antenna ports, same subframe.

In order to reduce the impact of the factors such as multipath, the present embodiment according to the cyclic prefix type during of up channel to time adjustment aim value T _TAArrange.With T _TABe set as 0～1/2 place of Cyclic Prefix front portion, usually get positive integer.For normal cyclic prefix (Normal Circle Prefix), usually get T _TA=1～4; For extended cyclic prefix (Extended Circle Prefix), usually get T _TA=2～16, T wherein _TAUnit be 16T _s

At last, according to up time offset estimation value n _TA ^(u)With desired value T _TA, the time adjusted value S of calculating user u _TA ^(u), be expressed as with formula:

$S_{\mathrm{TA}}^{\left(u\right)}=n_{\mathrm{TA}}^{\left(u\right)}-T_{\mathrm{TA}},---\left(2\right)$

N wherein _TA ^(u)Be n _max ^(u)Correction value, the purpose of correction is to make the precision of time offset estimation satisfy 16T _sIf: the n that is tried to achieve by (1) formula _max ^(u)Unit is 16T _s, directly order $n_{\mathrm{TA}}^{\left(u\right)}=n_{\max }^{\left(u\right)};$ If the n that is tried to achieve by (1) formula _max ^(u)Unit be not 16T _s, need according to n _max ^(u)Sampling interval, by modes such as interpolation or samplings, its sampling interval is modified to 16T _s, make that revised time offset estimation value is n _TA ^(u), n _TA ^(u)Time offset estimation satisfy 16T _sRequired precision.

The present embodiment is by the uplink channel estimation sequence

Try to achieve up time offset estimation value n _TA ^(u), according to the cyclic prefix type during setup times adjustment aim value T of up channel _TAThereby, calculate time adjusted value S _TA ^(u)Do like this, make the process of finding the solution the time adjusted value simple, and pass through desired value T _TAArrange, can reduce the harmful effect that multipath disturbs, be conducive to improve the control precision of uplink synchronous.

Preferably, in above-mentioned ascending synchronous control method, step S103 specifically comprises: if the time adjusted value exceeds the adjustment window, namely $S_{\mathrm{TA}}^{\left(u\right)}\∉\left[\begin{array}{cc}-31& 32\end{array}\right],$ Compare the exit window times N _ExWin ^(u)With threshold value N _ThExWinAccording to the exit window times N _ExWin ^(u)With threshold value N _ThExWinThe magnitude relationship rise time adjust instruction.

In the present embodiment $S_{\mathrm{TA}}^{\left(u\right)}\&NotElement;\left[\begin{array}{cc}-31& 32\end{array}\right],$ Namely $S_{\mathrm{TA}}^{\left(u\right)}<-31$ Or $S_{\mathrm{TA}}^{\left(u\right)}>32,$ Further judge the exit window times N _ExWin ^(u)With exit window number of times threshold value N _ThExWinMagnitude relationship, according to N _ExWin ^(u)With N _ThExWinThe magnitude relationship rise time adjust instruction, wherein exit window times N _ExWin ^(u)Counted by the exit window counter.Due to $S_{\mathrm{TA}}^{\left(u\right)}\&NotElement;\left[\begin{array}{cc}-31& 32\end{array}\right],$ Therefore in the present embodiment, the time adjusted value has exceeded the adjustment window, need to carry out abnormality processing.

Preferably, in above-mentioned ascending synchronous control method, according to the exit window times N _ExWin ^(u)With threshold value N _ThExWinThe magnitude relationship rise time adjust instruction and specifically comprise: if $N_{\mathrm{ExWin}}^{\left(u\right)}\&le;N_{\mathrm{ThExWin}},$ Compare time adjusted value S _TA ^(u)With the end points of adjusting window; According to time adjusted value S _TA ^(u)Adjust instruction with the magnitude relationship rise time of end points; The exit window times N is set _ExWin ^(u)Add one

In the present embodiment, the time adjusted value has exceeded the adjustment window, and judgement obtains $N_{\mathrm{ExWin}}^{\left(u\right)}\&le;N_{\mathrm{ThExWin}},$ Due to the exit window times N _ExWin ^(u)Seldom, even can think and occur asynchronously, its nonsynchronous degree is also slighter, so the time further time adjusted value S relatively _TA ^(u)With the end points of adjusting window, and the exit window times N is set _ExWin ^(u)Add one, so that the exit window of next time statistics.

Preferably, in above-mentioned ascending synchronous control method, according to time adjusted value S _TA ^(u)Adjusting instruction with the magnitude relationship rise time of end points specifically comprises: if the time adjusted value is less than the lower limit end points of adjusting window, namely $S_{\mathrm{TA}}^{\left(u\right)}<-31,$ Setup times is adjusted instruction for lagging behind the very first time.The time of user u is adjusted command list be shown TA ^(u)For user u, if $N_{\mathrm{ExWin}}^{\left(u\right)}\&le;N_{\mathrm{ThExWin}}$ And $S_{\mathrm{TA}}^{\left(u\right)}<-31,$ Be judged as front exit window, show that it is owing to having shifted to an earlier date a period of time, therefore the time of current time is adjusted instruction TA that actual uplink exceeds window ranges launch time ^(u)The very first time α that is set to lag behind is expressed as with formula:

TA ^(u)＝31-α，(3)

Wherein 0≤α≤31, and α are positive integer, and unit is 16T _s, representing a certain set time skew, the negative sign before α represents to lag behind, and is about to postpone launch time, with season $N_{\mathrm{ExWin}}^{\left(u\right)}=N_{\mathrm{ExWin}}^{\left(u\right)}+1.$ Usually the span of α is α={ 2,4,8}, N _ExWin ^(u)Span be N _ThExWin={ 16,8,4}, and α and N _ExWin ^(u)Usually satisfy α N _ThExWin≤ 32.

The above α and N _ExWin ^(u)Value is only the preferred embodiments of the present invention, is not limited to the present invention, can arrange flexibly according to the needs of practical application.

The present embodiment belongs to the situation of front exit window, show that it is owing to having shifted to an earlier date a period of time, therefore make terminal postpone a time offset, i.e. very first time α on original launch time that actual uplink exceeds window ranges launch time, transmit uplink signal, be conducive to uplink synchronous and control again.

Preferably, in above-mentioned ascending synchronous control method, according to time adjusted value S _TA ^(u)Adjust instruction TA with the magnitude relationship rise time of end points ^(u)Specifically comprise: if time adjusted value S _TA ^(u)Greater than the upper limit end points of adjusting window, setup times is adjusted instruction TA ^(u)Be leading the second time.

For user u, if $N_{\mathrm{ExWin}}^{\left(u\right)}\&le;N_{\mathrm{ThExWin}}$ And $S_{\mathrm{TA}}^{\left(u\right)}>32,$ Be judged as rear exit window, show that it is owing to having lagged behind a period of time, therefore the time of current time is adjusted instruction TA that actual uplink exceeds window ranges launch time ^(u)Be set to leading the second time β, be expressed as with formula:

TA ^(u)＝31+β， (4)

Wherein 0≤β≤32, and β are positive integer, and unit is 16T _s, representing a certain set time skew, the positive sign before β represents in advance, is about to launch time in advance, with season $N_{\mathrm{ExWin}}^{\left(u\right)}=N_{\mathrm{ExWin}}^{\left(u\right)}+1.$ Usually the span of β is β={ 2,4,8}, N _ExWin ^(u)Span be N _ThExWin={ 16,8,4}, and β and N _ExWin ^(u)Usually satisfy β N _ThExWin≤ 32.

The above β and N _ExWin ^(u)Value is only the preferred embodiments of the present invention, is not limited to the present invention, can arrange flexibly according to the needs of practical application.

The present embodiment belongs to the situation of rear exit window, show that it is owing to having lagged behind a period of time that actual uplink exceeds window ranges launch time, thus make terminal put forward previous time offset on original launch time, i.e. the second time β, transmit uplink signal, be conducive to uplink synchronous and control again.

Preferably, in above-mentioned ascending synchronous control method, according to the exit window times N _ExWin ^(u)With threshold value N _ThExWinThe magnitude relationship rise time adjust instruction TA ^(u)Specifically comprise: if $N_{\mathrm{ExWin}}^{\left(u\right)}>N_{\mathrm{ThExWin}},$ Setup times is adjusted instruction TA ^(u)For invalid, perhaps be adjusted value TA not ^(u)=31; With the exit window times N _ExWin ^(u)Zero clearing.

In the present embodiment $N_{\mathrm{ExWin}}^{\left(u\right)}>N_{\mathrm{ThExWin}},$ It is the exit window times N _ExWin ^(u)Surpassed exit window number of times threshold value N _ThExWin, due to the exit window times N _ExWin ^(u)More, can think that nonsynchronous degree is more serious, will adjust instruction TA the time ^(u)Be set to the invalid not transmit uplink signal of terminal that makes, perhaps it is set to not adjusted value, i.e. TA ^(u)=31, make the time-preserving of terminal to transmit uplink signal, and with the exit window times N _ExWin ^(u)Zero clearing is so that again effectively add up and judge the exit window number of times.

Preferably, in above-mentioned ascending synchronous control method, step S103 specifically comprises: if time adjusted value S _TA ^(u)Do not exceed the adjustment window, namely $S_{\mathrm{TA}}^{\left(u\right)}\&Element;\left[\begin{array}{cc}-31& 32\end{array}\right],$ Adjusted value rise time time adjustment instruction TA according to a upper moment and current time ^(u)With the exit window times N _ExWin ^(u)Zero clearing.

In the present embodiment $S_{\mathrm{TA}}^{\left(u\right)}\&Element;\left[\begin{array}{cc}-31& 32\end{array}\right],$ Namely $-31\&le;S_{\mathrm{TA}}^{\left(u\right)}\&le;32,$ Adjusted instruction TA according to the time adjusted value of a upper moment and current time according to the regulation rise time of agreement ^(u), and with the zero clearing of exit window number of times, even $N_{\mathrm{ExWin}}^{\left(u\right)}=0,$ So that again the exit window number of times is effectively added up and is judged.

Fig. 2 shows the flow chart of ascending synchronous control method according to a second embodiment of the present invention, and the method comprises the following steps:

Step S201 calculates up time offset estimation value according to the uplink channel estimation sequence;

Step S202 is according to the cyclic prefix type during setup times adjustment aim value of up channel;

Step S203 calculates the time adjusted value according to up time offset estimation value and desired value;

Step S204, whether the time adjusted value of judgement exceeds the adjustment window, if do not exceed, forwards step S211 to;

Step S205, the magnitude relationship of comparison exit window number of times and threshold value is if the exit window number of times greater than threshold value, forwards step S210 to;

Step S206, whether the time adjusted value of judgement namely judges whether belong to the situation of front exit window less than the lower limit of adjusting window, forwards step S208 to if be not less than;

Step S207, less than the lower limit of adjusting window, therefore belong to the situation of front exit window, setup times is adjusted instruction for lagging behind the very first time, forwards step S209 to due to the time adjusted value;

Step S208, be not less than the lower limit of adjusting window due to the time adjusted value, and judged in step S204 that time adjusted value herein exceeds the adjustment window, the time adjusted value must be greater than the upper limit of adjusting window, the situation that namely belongs to rear exit window, it is leading the second time that setup times is adjusted instruction;

Step S209 arranges the exit window number of times and adds one;

It is invalid or adjusted value not that step S210, setup times adjust instruction, forwards step S212 to;

Step S211 is according to the adjusted value rise time time adjustment instruction of a upper moment and current time;

Step S212, the zero clearing of exit window number of times;

Step S213 is according to time adjustment instruction issue upward signal.

The second embodiment of the present invention is divided into following several situation, and carries out four kinds of different disposal for different situations:

1) the time adjusted value does not exceed adjustment window (the "No" branch of step S204), execution in step S211;

2) the time adjusted value exceeds and adjusts window and exit window number of times greater than threshold value (the "Yes" branch of step S205), execution in step S210;

3) the time adjusted value exceed adjust window and exit window number of times less than or equal to threshold value and time adjusted value less than adjusting the lower window edge end points, namely before exit window (the "Yes" branch of step S206), execution in step S207;

4) the time adjusted value exceed adjust window and exit window number of times less than or equal to threshold value and time adjusted value greater than adjusting window upper limit end points, namely after exit window (the "No" branch of step S206), execution in step S208.

Preferably, in above-mentioned ascending synchronous control method, step S103 specifically comprises: if $S_{\mathrm{TA}}^{\left(u\right)}>32,$ Perhaps $N_{\mathrm{ExWin}}^{\left(u\right)}>N_{\mathrm{ThExWin}},$ Adjusted value rise time time adjustment instruction TA according to a upper moment and current time ^(u)With the exit window times N _ExWin ^(u)Zero clearing.

The present embodiment is only right $S_{\mathrm{TA}}^{\left(u\right)}<-31$ Front exit window situation carry out special processing, namely setup times is adjusted instruction for lagging behind very first time and the exit window number of times is added one, and right $S_{\mathrm{TA}}^{\left(u\right)}>32$ Rear exit window situation with $N_{\mathrm{ExWin}}^{\left(u\right)}>N_{\mathrm{ThExWin}}$ Situation do not make differentiated treatment, all according to upper one constantly and adjusted value rise time time of current time adjustment instruction TA ^(u)And with the exit window times N _ExWin ^(u)Zero clearing.

Preferably, in above-mentioned ascending synchronous control method, step S103 specifically comprises: if time adjusted value S _TA ^(u)Do not exceed the adjustment window, namely $S_{\mathrm{TA}}^{\left(u\right)}\&Element;\left[\begin{array}{cc}-31& 32\end{array}\right],$ Adjusted value rise time time adjustment instruction TA according to a upper moment and current time ^(u)With the exit window times N _ExWin ^(u)Zero clearing.

The present embodiment pair $-31\&le;S_{\mathrm{TA}}^{\left(u\right)}\&le;32$ Not exit window situation, according to upper one constantly and the time adjusted value of current time according to the regulation rise time adjustment instruction TA of agreement ^(u), and with the zero clearing of exit window number of times, even $N_{\mathrm{ExWin}}^{\left(u\right)}=0,$ So that again the exit window number of times is effectively added up and is judged.

Fig. 3 shows the flow chart of the ascending synchronous control method of a third embodiment in accordance with the invention, and the method comprises the following steps:

Step S301 calculates up time offset estimation value according to the uplink channel estimation sequence;

Step S302 is according to the cyclic prefix type during setup times adjustment aim value of up channel;

Step S303 calculates the time adjusted value according to up time offset estimation value and desired value;

Step S304, whether the time adjusted value of judgement exceeds the adjustment window, if do not exceed, forwards step S309 to;

Step S305, the magnitude relationship of comparison exit window number of times and threshold value is if the exit window number of times greater than threshold value, forwards step S309 to;

Step S306, whether the time adjusted value of judgement namely judges whether belong to the situation of front exit window less than the lower limit of adjusting window, forwards step S309 to if be not less than;

Step S307, less than the lower limit of adjusting window, therefore belong to the situation of front exit window, setup times is adjusted instruction for lagging behind the very first time due to the time adjusted value;

Step S308 arranges the exit window number of times and adds one, forwards step S311 to;

Step S309 is according to the adjusted value rise time time adjustment instruction of a upper moment and current time;

Step S310, the zero clearing of exit window number of times;

Step S311 is according to time adjustment instruction issue upward signal.

The third embodiment of the present invention is divided into following several situation, and carries out two kinds of different disposal for different situations:

1) the time adjusted value does not exceed adjustment window (the "No" branch of step S304), perhaps the time adjusted value exceeds and adjusts window and exit window number of times greater than threshold value (the "Yes" branch of step S305), perhaps the time adjusted value exceeds and adjusts window and exit window number of times less than or equal to threshold value, and the time adjusted value is greater than adjusting the namely rear exit window (the "No" branch of step S306) of window upper limit end points, execution in step S309;

2) the time adjusted value exceed adjust window and exit window number of times less than or equal to threshold value and time adjusted value less than adjust the lower window edge end points namely before exit window (the "Yes" branch of step S306), execution in step S307.

Preferably, in above-mentioned ascending synchronous control method, step S103 specifically comprises: if time adjusted value S _TA ^(u)Less than the lower limit end points of adjusting window, perhaps $N_{\mathrm{ExWin}}^{\left(u\right)}>N_{\mathrm{ThExWin}},$ Adjusted value rise time time adjustment instruction TA according to a upper moment and current time ^(u)With the exit window times N _ExWin ^(u)Zero clearing.

The present embodiment is only right $S_{\mathrm{TA}}^{\left(u\right)}>32$ Rear exit window situation carry out special processing, namely setup times is adjusted instruction and is leading the second time and the exit window number of times is added one, and right $S_{\mathrm{TA}}^{\left(u\right)}<-31$ Front exit window situation with $N_{\mathrm{ExWin}}^{\left(u\right)}>N_{\mathrm{ThExWin}}$ Situation do not make differentiated treatment, all according to upper one constantly and adjusted value rise time time of current time adjustment instruction TA ^(u)And with the exit window times N _ExWin ^(u)Zero clearing.

Preferably, in above-mentioned ascending synchronous control method, step S103 specifically comprises: if time adjusted value S _TA ^(u)Do not exceed the adjustment window, namely $S_{\mathrm{TA}}^{\left(u\right)}\&Element;\left[\begin{array}{cc}-31& 32\end{array}\right],$ Adjusted according to adjusted value rise time time of a upper moment and current time and refer to TA ^(u)With the exit window times N _ExWin ^(u)Zero clearing.

The present embodiment pair $-31\&le;S_{\mathrm{TA}}^{\left(u\right)}\&le;32$ Not exit window situation, according to upper one constantly and the time adjusted value of current time according to the regulation rise time adjustment instruction TA of agreement ^(u), and with the zero clearing of exit window number of times, even $N_{\mathrm{ExWin}}^{\left(u\right)}=0,$ So that again the exit window number of times is effectively added up and is judged.

Fig. 4 shows the flow chart of the ascending synchronous control method of a fourth embodiment in accordance with the invention, and the method comprises the following steps:

Step S401 calculates up time offset estimation value according to the uplink channel estimation sequence;

Step S402 is according to the cyclic prefix type during setup times adjustment aim value of up channel;

Step S403 calculates the time adjusted value according to up time offset estimation value and desired value;

Step S404, whether the time adjusted value of judgement exceeds the adjustment window, if do not exceed, forwards step S409 to;

Step S405, the magnitude relationship of comparison exit window number of times and threshold value is if the exit window number of times greater than threshold value, forwards step S409 to;

Step S406, if whether the time adjusted value of judgement namely judges whether belong to the situation of front exit window, less than forward step S409 less than the lower limit of adjusting window;

Step S407 is not less than the lower limit of adjusting window due to the time adjusted value, therefore belong to the situation of rear exit window, it is leading the second time that setup times is adjusted instruction;

Step S408 arranges the exit window number of times and adds one, forwards step S411 to;

Step S409 is according to the adjusted value rise time time adjustment instruction of a upper moment and current time;

Step S410, the zero clearing of exit window number of times;

Step S411 is according to time adjustment instruction issue upward signal.

The fourth embodiment of the present invention is divided into following several situation, and carries out two kinds of different disposal for different situations:

1) the time adjusted value does not exceed adjustment window (the "No" branch of step S404), perhaps the time adjusted value exceeds and adjusts window and exit window number of times greater than threshold value (the "Yes" branch of step S405), perhaps the time adjusted value exceeds and adjusts window and exit window number of times less than or equal to threshold value, and the time adjusted value is less than adjusting the namely front exit window (the "Yes" branch of step S406) of lower window edge end points, execution in step S409;

2) the time adjusted value exceed adjust window and exit window number of times less than or equal to threshold value and time adjusted value greater than adjust window upper limit end points namely after exit window (the "No" branch of step S406), execution in step S407.

Preferably, in above-mentioned ascending synchronous control method, step S103 specifically comprises: if $N_{\mathrm{ExWin}}^{\left(u\right)}\&le;N_{\mathrm{ThExWin}},$ Adjusted value rise time time adjustment instruction TA according to a upper moment and current time ^(u)With the exit window times N _ExWin ^(u)Zero clearing.

The present embodiment is not distinguished $N_{\mathrm{ExWin}}^{\left(u\right)}\&le;N_{\mathrm{ThExWin}}$ In $S_{\mathrm{TA}}^{\left(u\right)}<-31$ Front exit window situation and $S_{\mathrm{TA}}^{\left(u\right)}>32$ Rear exit window situation, but the unified setup times that is treated to is adjusted instruction TA ^(u)For invalid, perhaps be adjusted value TA not ^(u)=31, and with the exit window times N _ExWin ^(u)Zero clearing, and right $N_{\mathrm{ExWin}}^{\left(u\right)}>N_{\mathrm{ThExWin}}$ Situation, according to upper one constantly and adjusted value rise time time of current time adjustment instruction TA ^(u)And with the exit window times N _ExWin ^(u)Zero clearing.

Preferably, in above-mentioned ascending synchronous control method, step S103 specifically comprises: if time adjusted value S _TA ^(u)Do not exceed the adjustment window, namely $S_{\mathrm{TA}}^{\left(u\right)}\&Element;\left[\begin{array}{cc}-31& 32\end{array}\right],$ Adjusted value rise time time adjustment instruction TA according to a upper moment and current time ^(u)With the exit window times N _ExWin ^(u)Zero clearing.

The present embodiment pair $-31\&le;S_{\mathrm{TA}}^{\left(u\right)}\&le;32$ Not exit window situation, according to upper one constantly and the time adjusted value of current time according to the regulation rise time adjustment instruction TA of agreement ^(u), and with the zero clearing of exit window number of times, even $N_{\mathrm{ExWin}}^{\left(u\right)}=0,$ So that again the exit window number of times is effectively added up and is judged.

Fig. 5 shows the flow chart of ascending synchronous control method according to a fifth embodiment of the invention, and the method comprises the following steps:

Step S501 calculates up time offset estimation value according to the uplink channel estimation sequence;

Step S502 is according to the cyclic prefix type during setup times adjustment aim value of up channel;

Step S503 calculates the time adjusted value according to up time offset estimation value and desired value;

Step S504, whether the time adjusted value of judgement exceeds the adjustment window, if do not exceed, forwards step S507 to;

Step S505, relatively the magnitude relationship of exit window number of times and threshold value, if the exit window number of times is not more than threshold value, forward step S507 to;

It is invalid or adjusted value not that step S406, setup times adjust instruction, forwards step S508 to;

Step S507 is according to the adjusted value rise time time adjustment instruction of a upper moment and current time;

Step S508, the zero clearing of exit window number of times;

Step S509 is according to time adjustment instruction issue upward signal.

The fifth embodiment of the present invention is divided into following several situation, and carries out two kinds of different disposal for different situations:

1) the time adjusted value does not exceed and adjusts window (the "No" branch of step S504), and perhaps the time adjusted value exceeds and adjusts window and exit window number of times less than or equal to threshold value (the "No" branch of step S505), execution in step S507;

2) the time adjusted value exceeds and adjusts window and exit window number of times greater than threshold value (the "Yes" branch of step S505), execution in step S506.

Fig. 6 shows the structure chart of uplink synchronous control device according to a sixth embodiment of the invention, and this device comprises:

Computing module 10 is used for calculating the time adjusted value according to the uplink channel estimation sequence;

Judge module 20 is used for judging whether the time adjusted value exceeds the adjustment window;

Instruction generation module 30 is used for adjusting instruction according to the judged result rise time;

Transmitter module 40 is used for adjusting the instruction issue upward signal according to the time.

at first above-described embodiment adopts computing module 10 to calculate the time adjusted value according to the uplink channel estimation sequence, then adopting 20 pairs of time adjusted values of judge module whether to exceed the adjustment window judges, and adopt instruction generation module 30 to generate different time adjustment instructions according to different judged results, adopt at last transmitter module 40 to adjust according to this time the moment that transmit uplink signal is adjusted in instruction, so having overcome the uplink synchronous control device in the correlation technique only processes the situation that the time adjusted value does not exceed in the adjustment window, ignored and to have had the abnormal conditions that exceed when adjusting window, also can't carry out special processing to these abnormal conditions, control the relatively poor problem of effect and cause exceeding when adjusting window uplink synchronous at the time adjusted value, because above-described embodiment carries out abnormality processing to exceeding adjustment window situation, and then no matter adjust window in the situation that whether the time adjusted value exceeds, all realized the degree of precision of uplink synchronous is controlled.

As can be seen from the above description, no matter the above embodiments of the present invention adjust window in the situation that whether the time adjusted value exceeds, and have all realized the degree of precision of uplink synchronous is controlled.

obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step being made into the single integrated circuit module realizes.Like this, the present invention is not restricted to any specific hardware and software combination.

The above is only the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (11)

1. an ascending synchronous control method that is used for long evolving system, is characterized in that, comprises the following steps:

Calculate the time adjusted value according to the uplink channel estimation sequence;

Judge whether described time adjusted value exceeds the adjustment window;

According to the adjustment instruction of judged result rise time;

According to described time adjustment instruction issue upward signal;

Wherein, adjusting instruction according to the judged result rise time comprises:

If described time adjusted value exceeds described adjustment window, compare exit window number of times and threshold value;

Generate described time adjustment instruction according to the magnitude relationship of described exit window number of times and described threshold value.

2. ascending synchronous control method according to claim 1, is characterized in that, calculates the time adjusted value according to the uplink channel estimation sequence and specifically comprise:

Calculate up time offset estimation value according to the uplink channel estimation sequence;

Cyclic prefix type during setup times adjustment aim value according to described up channel;

Calculate described time adjusted value according to described up time offset estimation value and described desired value.

3. ascending synchronous control method according to claim 1, is characterized in that, adjusts instruction according to the described time of magnitude relationship generation of described exit window number of times and described threshold value and specifically comprise:

If described exit window number of times is less than or equal to described threshold value, the end points of more described time adjusted value and described adjustment window;

Generate described time adjustment instruction according to the magnitude relationship of described time adjusted value and described end points;

Described exit window number of times is set adds one.

4. ascending synchronous control method according to claim 3, is characterized in that, adjusts instruction according to the described time of magnitude relationship generation of described time adjusted value and described end points and specifically comprise:

If described time adjusted value less than the lower limit end points of described adjustment window, arranges the described time and adjusts instruction for lagging behind the very first time.

5. ascending synchronous control method according to claim 3, is characterized in that, adjusts instruction according to the described time of magnitude relationship generation of described time adjusted value and described end points and specifically comprise:

If it is leading the second time that described time adjusted value greater than the upper limit end points of described adjustment window, arranges described time adjustment instruction.

6. ascending synchronous control method according to claim 1, is characterized in that, adjusts instruction according to the described time of magnitude relationship generation of described exit window number of times and described threshold value and specifically comprise:

To adjust instruction be invalid if described exit window number of times greater than described threshold value, arranges described time, perhaps is adjusted value not;

With the zero clearing of described exit window number of times.

7. ascending synchronous control method according to claim 4, is characterized in that, adjusts instruction according to the judged result rise time and specifically comprise:

If described time adjusted value is greater than the upper limit end points of described adjustment window, perhaps described exit window number of times is greater than described threshold value, according to the described time adjustment instruction of described time of adjusted value generation of a upper moment and current time;

With the zero clearing of described exit window number of times.

8. ascending synchronous control method according to claim 5, is characterized in that, adjusts instruction according to the judged result rise time and specifically comprise:

If described time adjusted value is less than the lower limit end points of described adjustment window, perhaps described exit window number of times is greater than described threshold value, according to the described time adjustment instruction of described time of adjusted value generation of a upper moment and current time;

With the zero clearing of described exit window number of times.

9. ascending synchronous control method according to claim 6, is characterized in that, adjusts instruction according to the judged result rise time and specifically comprise:

If described exit window number of times is less than or equal to described threshold value, according to the described time adjustment instruction of described time of adjusted value generation of a upper moment and current time;

With the zero clearing of described exit window number of times.

10. the described ascending synchronous control method of any one according to claim 1 to 9, is characterized in that, adjusts instruction according to the judged result rise time and specifically comprise:

If described time adjusted value does not exceed described adjustment window, according to the described time adjustment instruction of described time of adjusted value generation of a upper moment and current time;

With the zero clearing of described exit window number of times.

11. a uplink synchronous control device that is used for long evolving system is characterized in that, comprising:

Computing module is used for calculating the time adjusted value according to the uplink channel estimation sequence;

Judge module is used for judging whether described time adjusted value exceeds the adjustment window;

The instruction generation module is used for adjusting instruction according to the judged result rise time;

Transmitter module is used for adjusting the instruction issue upward signal according to the described time;

Wherein, described instruction generation module compares exit window number of times and threshold value in the situation that described time adjusted value exceeds described adjustment window; Generate described time adjustment instruction according to the magnitude relationship of described exit window number of times and described threshold value.

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