CN102244536A - Method and apparatus for uplink synchronization in mobile communication system - Google Patents

Abstract

The invention, which relates to the communication field, provides a method and an apparatus for uplink synchronization in a mobile communication system. In the prior art, there is loss of synchronism of the uplink when no service is sent by UE for a long time; however, according to the invention, the above-mentioned problem can be solved. The method comprises the following steps: obtaining receiving sequences of a plurality of subframes in a local receiving frame and local sequences that are arranged in advance locally; obtaining downlink time bias information of the receiving frame according to the plurality of receiving sequences and phase information of the local sequences; and carrying out uplink synchronization by employing the downlink time bias information of the receiving frame, wherein the receiving frame is a frame that is sent by a base station and is received locally after wireless channel transmission. The above-mentioned technical scheme in the method provided in the invention can be applied to the mobile communication field.

Description

The method and apparatus of uplink synchronous in mobile communication system

Technical field

The present invention relates to the communications field, relate in particular to a kind of in mobile communication system the method and apparatus of uplink synchronous.

Background technology

At LTE (LongTermEnvolution, Long Term Evolution) in the system, base station and UE's (user terminal) is a very crucial problem synchronously, wherein comprise down-going synchronous and uplink synchronous, down-going synchronous is meant that UE detects the major-minor synchronizing information of time domain subframe 0 and subframe 5, obtain wireless frame head and carry out essence on this basis synchronously, smart the synchronously real-time of UE and base station that guaranteed synchronously.And uplink synchronous is meant that the data that the base station receives each UE must be and the alignment of wireless frame frequency, generally be to obtain initial synchronisation by random access procedure, can upstream data or control signal be detected with the base station synchronously after the access, obtain TA (Time Advanced, Timing Advance) value is handed down to UE, reaches uplink synchronous thereby UE adjusts the data transmitting time according to this TA value.

With reference to the accompanying drawings 1, the figure shows LTE system synchronization flow process in the prior art, comprise step:

Step S101:NodeB is the broadcast system broadcast on broadcast channel;

Comprise the parameters configuration of current area in this system broadcast message, specifically can comprise bandwidth information, duplex mode, cell type, sub-frame configuration, insert form time slot configuration, frequency domain resource RB (Resource Blocks at random, Resource Block) take, NCS (Number of cyclic shifts index, cyclic shift numerical index) configuration, root sequential logic index, cyclic shift choose etc.;

Step S102:UE carries out down-going synchronous, and the search broadcast channel obtains system broadcast message;

Descending essence of carrying out in normal Business Processing of step S103:UE is synchronous, guarantees descending real-time synchronous;

Step S201:UE generates targeting sequencing according to the parameters configuration of the current area that comprises in this system broadcast message;

Targeting sequencing comprises CP (Cyclic Prefix, Cyclic Prefix) and detects data sequence Sequence as shown in Figure 2.Wherein, the correlation peak information of targeting sequencing can be in the original position in selected root sequence cyclic shift zone;

Step S202:UE sends to NodeB with the targeting sequencing that generates by antennal interface;

Step S203:NodeB receives the targeting sequencing that UE sends, and regularly intercepts this targeting sequencing data, then the data that intercepted is detected, and propagation delay time TA1 value obtains eating dishes without rice or wine;

In agreement, do not distinguish the TA1 that measures according to RACH (Random Access Channel) in the access procedure and insert the TA2 that the back obtains according to traffic measurement, all remember and be TA, according to producing difference constantly, it is remembered respectively be TA1 and TA2 in this method explanation, be convenient to describe.TA1 is meant the eat dishes without rice or wine propagation delay time of UE apart from the base station, directly reacts the position of UE and NodeB antenna opening, and this value is back and forth the time delay of eating dishes without rice or wine.The scope that inserts TA1 in the agreement at random is 0～1282, and promptly representing in the time of TA1=0 does not have the transmission delay that need overcome between UE and the NodeB, and both sequential are alignd.

Step S204:NodeB is handed down to UE with TA1, and UE obtains this value back and judges whether TA is 0, if be not 0, enters S205; If 0, then directly enter S206;

Step S205:UE shifts to an earlier date TA1 with the sequential of self;

Step S206:UE finishes whole access procedure, sends business datum then;

Step S207:NodeB receives business datum and measures the TA2 value;

TA2 be meant since UE and NodeB since the clock local oscillator exist frequency deviation or owing to UE in moving process, produce the time be worth partially, the scope of stipulating this value in the agreement is 0～63, when TA2=32, expression UE and NodeB align, do not need to carry out the sequential adjustment,, shown the evening in the moment of UE transmission when TA2＞32, need to adjust forward, vice versa.

Step S208:NodeB is handed down to UE with TA2, and whether UE judges the TA value greater than 32, if enter S210; Otherwise enter 209;

Step S209: whether judge TA2 less than 32, if less than, enter S211, otherwise enter S206;

Step S210:UE adjusts TA2-32 forward with self sequential, enters S206;

Step S211:UE adjusts 32-TA2 backward with self sequential, enters S206.

State in realization in the process, the inventor finds that if long-time up do not have business to be uploaded to NodeB, NodeB just can not obtain TA2 according to business datum, and then UE just can not make TA2 that self sequential is adjusted, and may cause uplink loss.

Summary of the invention

The invention provides a kind of in mobile communication system the method and apparatus of uplink synchronous, solve the problem of uplink loss when UE does not have professional the transmission for a long time in the prior art.

For solving the problems of the technologies described above, the invention provides following technical scheme:

A kind of in mobile communication system the method for uplink synchronous, comprising:

Obtain the receiving sequence and the local local sequence that sets in advance of a plurality of subframes in the local received frame;

According to the phase information of described a plurality of receiving sequences and described local sequence, breath believes one side only when obtaining described received frame descending;

The breath that believes one side only when adopting described received frame descending carries out uplink synchronous;

Wherein said received frame is that the base station sends and transmits the frame of back local reception through wireless channel.

Further, the breath that believes one side only during described received frame descending obtains in the following way:

Obtain the phase difference between identical consecutive points in described each receiving sequence and the described local sequence;

Breath believes one side only when obtaining each subframe in the described received frame descending according to the phase difference between described consecutive points;

The breath that believes one side only during according to each subframe in the described received frame descending, breath believes one side only when obtaining described received frame descending.

Further, the breath that believes one side only during each subframe descending in the described received frame is

$\frac{1}{M}\underset{k=1}{\overset{M-1}{\mathrm{\Σ}}}\frac{N}{2\mathrm{\π}}\∠\left\{r^{*}(k+1)s(k+1){\left(r^{*}\left(k\right)s\left(k\right)\right)}^{*}\right\},$

The receiving sequence of subframe in the described received frame of r (k) expression wherein, the local local sequence of s (k) expression, * represents conjugation, and ∠ represents to get the computing of phase angle, and M represents the number of described receiving sequence or described local sequence mid point, k=0 wherein ..., M-1.

Further, described uplink synchronous comprises need carry out the adjustment of up sequential and length to the transmit frame that described base station sends to this locality,

The up sequential of wherein adjusting described transmit frame comprises: if the breath that believes one side only during described received frame descending equals 0, then the up sequential of described transmit frame is not adjusted; If greater than 0, then adjust the up sequential of described transmit frame backward; If less than 0, then adjust the up sequential of described transmit frame forward, the adjustment position of wherein said up sequential is the original position of the next frame frequency of current up sequential, believe one side only during for described received frame the descending absolute value of breath of the variation of described up sequential size;

The length of wherein adjusting described transmit frame comprises: if the breath that believes one side only during described received frame descending equals 0, then do not adjust the length of described transmit frame; If greater than 0, then increase the length of described transmit frame; If less than 0, then reduce the length of described transmit frame; The adjusting range of wherein said frame length is the Cyclic Prefix (CP) of a symbol in the described transmit frame, believe one side only during for described received frame the descending absolute value of breath of the variation of described frame length size.

A kind of in mobile communication system the device of uplink synchronous, comprising:

First acquisition module is used for obtaining the receiving sequence of the local a plurality of subframes of received frame and the local sequence that this locality sets in advance;

Second acquisition module links to each other with described first acquisition module, is used for the phase information according to described a plurality of receiving sequences and described local sequence, and breath believes one side only when obtaining described received frame descending;

Synchronization module links to each other with described second acquisition module, and the breath that believes one side only when being used to adopt described received frame descending carries out uplink synchronous;

Wherein said received frame is that the base station sends and transmits the frame of back local reception through wireless channel.

Further, described second acquisition module comprises:

First acquiring unit is used for obtaining the phase difference between described each receiving sequence and the identical consecutive points of described local sequence;

Second acquisition unit links to each other with described first acquiring unit, and breath believes one side only when being used for obtaining each subframe in the described received frame descending according to the phase difference between described consecutive points;

The 3rd acquiring unit links to each other with described second acquisition unit, the breath that believes one side only when being used for according to each subframe in the described received frame descending, and breath believes one side only when obtaining described received frame descending.

Further, the breath that believes one side only during each subframe descending in the described received frame is

$\frac{1}{M}\underset{k=1}{\overset{M-1}{\mathrm{\Σ}}}\frac{N}{2\mathrm{\π}}\∠\left\{r^{*}(k+1)s(k+1){\left(r^{*}\left(k\right)s\left(k\right)\right)}^{*}\right\},$

Wherein r (k) represents the receiving sequence of subframe in the described received frame, the local local sequence of s (k) expression; * represent conjugation, ∠ represents to get the computing of phase angle, and M represents the number of described receiving sequence or described local sequence mid point, k=0 wherein ..., M-1.

Further, described synchronization module comprises:

First adjustment unit is used to adjust the up sequential of the transmit frame that this locality need send to described base station, if the breath that believes one side only during described received frame descending equals 0, then the up sequential of described transmit frame is not adjusted; If greater than 0, then adjust the up sequential of described transmit frame backward; If less than 0, then adjust the up sequential of described transmit frame forward, the adjustment position of wherein said up sequential is the original position of the next frame frequency of current up sequential, believe one side only during for described received frame the descending absolute value of breath of the variation of described up sequential size;

Second adjustment unit, the length that is used to adjust the transmit frame that this locality need send to described base station comprises: if the breath that believes one side only during described received frame descending equals 0, then do not adjust the length of described transmit frame; If greater than 0, then increase the length of described transmit frame; If less than 0, then reduce the length of described transmit frame; The adjusting range of wherein said frame length be described this locality need be in the frame that described base station sends the Cyclic Prefix (CP) of a symbol, believe one side only during for described received frame the descending absolute value of breath of the variation size of described frame length.

One or more embodiment provided by the invention, carry out uplink synchronous when adopting descending that the phase difference of receiving sequence and local sequence determines partially, can carry out uplink synchronous in real time, just can carry out uplink synchronous when having only the business datum of existence in the prior art compares, the problem that uplink loss can not occur has improved the reliability of network.

Description of drawings

Fig. 1 be in the prior art in mobile communication system the method flow schematic diagram of uplink synchronous;

Fig. 2 is the schematic diagram of targeting sequencing data format in the prior art;

Fig. 3 be provided by the invention in mobile communication system the schematic flow sheet of the method embodiment of uplink synchronous;

Fig. 4 be provided by the invention in mobile communication system the schematic flow sheet of the method application example of uplink synchronous;

Fig. 5 adjusts the sequential and the schematic diagram data 1 of front and back for sequential among the present invention;

Fig. 6 adjusts the sequential and the schematic diagram data 2 of front and back for sequential among the present invention;

Fig. 7 be provided by the invention in mobile communication system the structural representation of the device embodiment of uplink synchronous;

Fig. 8 be embodiment illustrated in fig. 7 in the structural representation of second acquisition module 702;

Fig. 9 is the structural representation of middle synchronization module 703 embodiment illustrated in fig. 7.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.

Fig. 3 be provided by the invention in mobile communication system the schematic flow sheet of the method embodiment of uplink synchronous.Method embodiment shown in Figure 3 comprises:

Step S301: receiving sequence and the local local sequence that sets in advance of obtaining a plurality of subframes in the local received frame;

Step S302: according to the phase information of described a plurality of receiving sequences and described local sequence, breath believes one side only when obtaining described received frame descending;

Step S303: the breath that believes one side only when adopting described received frame descending carries out uplink synchronous;

Wherein said received frame is that the base station sends and transmits the frame of back local reception through wireless channel.

The method that the embodiment of the invention provides, carry out uplink synchronous when adopting descending that the phase difference of receiving sequence and local sequence determines partially, can carry out uplink synchronous in real time, just can carry out uplink synchronous when having only the business datum of existence in the prior art compares, the problem that uplink loss can not occur has improved the reliability of network.

Below method provided by the invention is described further:

Fig. 4 be provided by the invention in mobile communication system the schematic flow sheet of the method application example of uplink synchronous.Application Example shown in Figure 4 comprises:

Step S401:UE detects local and the base station does not reach accurate uplink synchronous;

Wherein the method to the coarse adjustment of uplink synchronous all is applicable to the present invention in the prior art, for example can realize in the following way:

UE obtains down-going synchronous, therefrom separates the parameters configuration of the current area that comprises in this system broadcast message; Generate targeting sequencing according to the descending sub-district relevant parameter that solves, send to NodeB, obtain NodeB and detect the time delay TA1 that eats dishes without rice or wine that obtains; The employing time delay TA1 value of eating dishes without rice or wine overcomes propagation delay time between UE and the NodeB.

Step S402:UE obtains the receiving sequence and the local local sequence of a plurality of subframes in the received frame that the NodeB that receives sends.

Wherein NodeB can initiatively send the frame that comprise pilot information to UE, and through after the transmission of wireless channel, UE receives this frame, and reads the sequence of all or part of subframe as receiving sequence from this comprises the frame of pilot information;

Wherein local sequence is that UE produces according to agreement, and for a specific UE, local sequence is unique, and promptly all receiving sequences all are to carry out related operation with this local sequence.

Step S403, UE obtain the phase difference between identical consecutive points in each receiving sequence and the local sequence;

In this step, suppose r (k), k=0 ..., M-1 is a receiving sequence, s (k), and k=0 ..., M-1 is local sequence, wherein k represents receiving sequence or local sequence.

When being m point at that time partially, do not considering under channel and the The noise that the pass that receives between data and the transmission data is

K=0 ..., M-1, wherein N represents FFTSIZE (fastFouriertransform SIZE, the size of fast fourier transform);

Phase difference obtains in the following way between consecutive points:

$r^{*}(k+1)s(k+1){\left(r^{*}\left(k\right)s\left(k\right)\right)}^{*}$

$={\left(s(k+1)e^{-j\frac{2\mathrm{\π}}{N}(k+1)m}\right)}^{*}s(k+1){\left({\left(s\left(k\right)e^{-j\frac{2\mathrm{\π}}{N}\mathrm{km}}\right)}^{*}s\left(k\right)\right)}^{*}$

$={\left|s(k+1)\right|}^2{e}^{j\frac{2\mathrm{\π}}{N}(k+1)m}{\left({\left|s\left(k\right)\right|}^2{e}^{j\frac{2\mathrm{\π}}{N}\left(k\right)m}\right)}^{*}$

$={\left|s(k+1)\right|}^2{\left|s\left(k\right)\right|}^2{e}^{j\frac{2\mathrm{\π}}{N}m}$

The step 404:UE breath that believes one side only when obtaining each subframe in the received frame descending according to the phase difference between each consecutive points.

In this step, the breath that believes one side only during each subframe descending adopts following formula to calculate

$\hat{m}=\frac{1}{M}\underset{k=1}{\overset{M-1}{\mathrm{\Σ}}}\frac{N}{2\mathrm{\π}}\∠\left\{r^{*}(k+1)s(k+1){\left(r^{*}\left(k\right)s\left(k\right)\right)}^{*}\right\}$

Wherein Inclined to one side estimated value when representing each subframe descending, the sequence of subframe in r (k) the expression received frame, the local local sequence corresponding of s (k) expression with receiving sequence, ^ represents to get the computing of estimated value, and * represents conjugation, and ∠ represents to get the computing of phase angle, M is the number of receiving sequence or local sequence mid point, k=0 wherein ..., M-1.

The step S405:UE breath that believes one side only during according to each subframe in the received frame descending, breath believes one side only when obtaining received frame descending.

In this step, the breath that believes one side only during with each subframe descending is averaged, and breath believes one side only in the time of can obtaining received frame descending.

Step S406, the UE breath that believes one side only when adopting received frame descending carries out uplink synchronous.

In this step, uplink synchronous comprises need carry out the adjustment of up sequential and length to the transmit frame that described base station sends to this locality,

The up sequential of wherein adjusting transmit frame comprises: if the breath that believes one side only during received frame descending equals 0, then the up sequential of transmit frame is not adjusted; If greater than 0, then adjust the up sequential of transmit frame backward; If less than 0, then adjust the up sequential of transmit frame forward, wherein the adjustment position of up sequential is the original position of the next frame frequency of current up sequential, believe one side only during for received frame the descending absolute value of breath of the variation of up sequential size;

The length of wherein adjusting transmit frame comprises: if the breath that believes one side only during received frame descending equals 0, and the length of uncomfortable whole transmit frame then; If greater than 0, then increase the length of transmit frame; If less than 0, then reduce the length of transmit frame; Wherein the adjusting range of frame length is the Cyclic Prefix (CP) of a symbol in the transmit frame, believe one side only during for received frame the descending absolute value of breath of the variation of frame length size.

Concrete, a subframe comprises 14 symbols, a symbol comprises L IQ (InphaseQuadrature inphase quadrature) data, and L is different with the difference of application bandwidth.When practical application, can select first symbol, also can select second symbol or other symbols to adjust; When adjusting the number of IQ data among the CP, the IQ of increase or deletion is continuous.

Wherein Fig. 5 and 6 is respectively sequential and the schematic diagram data before and after the sequential adjustment among the present invention, and schematic diagram wherein shown in Figure 5 believes one side only breath less than the schematic diagram under 0 situation when being descending; Schematic diagram shown in Figure 6 believes one side only breath greater than the schematic diagram under 0 situation when being descending.

In actual applications because the existence always of frequency deviation between UE and the NodeB, so after after a while, when step S405 obtains partially value greater than this locality can detected smallest particles degree after, just need carry out uplink synchronous.

Need to prove, owing to carry out uplink synchronous in the time of should adopting descending that the phase difference of receiving sequence and local sequence determines with UE in the example partially, can carry out uplink synchronous in real time, just can carry out uplink synchronous when having only the business datum of existence in the prior art compares, can not occur not carrying out the sight of uplink synchronous for a long time, thereby avoid the appearance of uplink loss phenomenon.

Describe with two concrete application examples below:

Concrete application example one:

Suppose that the local oscillator of UE is faster than NodeB local frequency in a NodeB and UE system, use the implementation step of this patent as follows:

Step 1:UE obtains down-going synchronous, therefrom separates the parameters configuration of the current area that comprises in this system broadcast message;

Step 2:UE is up to generate targeting sequencing according to the descending sub-district relevant parameter that solves, and sends to NodeB, and NodeB detects the time delay TA1 that eats dishes without rice or wine, and is handed down to UE;

Step 3:UE shifts to an earlier date the TA1 value with up sequential and obtains up sequential on the basis of down-going synchronous;

Step 4:UE demodulates the descending pilot signal that receives, and carries out related operation according to the certain calculation rule then, obtains inclined to one side estimated value when descending, and the time inclined to one side estimated value that calculates of hypothesis is 6TS here;

Whether inclined to one side estimated value was greater than 0 when step 5:UE judged, this moment, 6TS was greater than 0, and on the basis of current up sequential, in the original position of next frame frequency, with up sequential hysteresis 6TS, it is little synchronous that up like this sequential and NodeB have just reached so;

Step 6: and the synchronous another one operation of step 5 is exactly that UE need adjust data, time next frame original position after the inclined to one side estimated value at up acquisition 6TS, before first IQ data of first symbol CP of present frame, add 6 IQ data, angle from UE, the CP value length of adjusting first symbol of frame has been increased 6TS, be that CP length becomes 166TS by 160TS, so far, once up little same EOS;

Concrete application example two

Suppose that the local oscillator of UE is slower than NodeB local frequency in a NodeB and UE system;

Step 1:UE obtains down-going synchronous, therefrom separates the parameters configuration of the current area that comprises in this system broadcast message;

Step 2:UE is up to generate targeting sequencing according to the descending sub-district relevant parameter that solves, and sends to NodeB, and NodeB detects the time delay TA1 that eats dishes without rice or wine, and is handed down to UE;

Step 3:UE shifts to an earlier date the TA1 value with up sequential and obtains up sequential on the basis of down-going synchronous;

Step 4:UE demodulates the descending pilot signal that receives, and obtains inclined to one side estimated value when descending, and the time inclined to one side estimated value that calculates of hypothesis is-6TS here;

Whether inclined to one side estimated value greater than 0 when step 5:UE judged, at this moment-6TS is less than 0, on the basis of current up sequential, in the original position of next frame frequency, up sequential shifted to an earlier date 6TS so, up like this sequential and NodeB just reached little synchronously;

Step 7:UE adjusts data, time next frame original position after the inclined to one side estimated value at up acquisition-6TS, first symbol CP of present frame is sent since the 7th IQ data, promptly do not send preceding 6 IQ data of first symbol CP, angle from UE, this first symbol CP length of adjusting frame becomes 154TS by 160TS, and this length of adjusting frame becomes 307194 by 307200 certainly.So far, once up little same EOS.

Fig. 7 be provided by the invention in mobile communication system the structural representation of the device embodiment of uplink synchronous.In conjunction with the content shown in Fig. 3～6, device shown in Figure 7 comprises:

First acquisition module 701 is used for obtaining the receiving sequence of the local a plurality of subframes of received frame and the local sequence that this locality sets in advance;

Second acquisition module 702 links to each other with described first acquisition module 701, is used for the phase information according to described a plurality of receiving sequences and described local sequence, and breath believes one side only when obtaining described received frame descending;

Synchronization module 703 links to each other with described second acquisition module 702, and the breath that believes one side only when being used to adopt described received frame descending carries out uplink synchronous.

Fig. 8 be embodiment illustrated in fig. 7 in the structural representation of second acquisition module 702.Second acquisition module 702 shown in Figure 9 comprises:

First acquiring unit 801 is used for obtaining the phase difference between described each receiving sequence and the identical consecutive points of described local sequence;

Second acquisition unit 802 links to each other with described first acquiring unit 801, and breath believes one side only when being used for obtaining each subframe in the described received frame descending according to the phase difference between described consecutive points;

The 3rd acquiring unit links to each other with described second acquisition unit, the breath that believes one side only when being used for according to each subframe in the described received frame descending, and breath believes one side only when obtaining described received frame descending.

The 3rd acquiring unit 803 links to each other with described second acquisition unit 802, and breath believes one side only when being used for obtaining each subframe in the described frame that receives descending according to the phase difference between described consecutive points;

The breath that believes one side only during each subframe descending in the wherein said received frame is

$\frac{1}{M}\underset{k=1}{\overset{M-1}{\mathrm{\Σ}}}\frac{N}{2\mathrm{\π}}\∠\left\{r^{*}(k+1)s(k+1){\left(r^{*}\left(k\right)s\left(k\right)\right)}^{*}\right\},$

The receiving sequence of subframe in the described received frame of r (k) expression wherein, the local local sequence of s (k) expression, * represents conjugation, and ∠ represents to get the computing of phase angle, and M represents the number of described receiving sequence or described local sequence mid point, k=0 wherein ..., M-1.

Fig. 9 is the structural representation of middle synchronization module 703 embodiment illustrated in fig. 7.Synchronization module 803 shown in Figure 9 comprises:

First adjustment unit is used to adjust the up sequential of the transmit frame that this locality need send to described base station, if the breath that believes one side only during described received frame descending equals 0, then the up sequential of described transmit frame is not adjusted; If greater than 0, then adjust the up sequential of described transmit frame backward; If less than 0, then adjust the up sequential of described transmit frame forward, the adjustment position of wherein said up sequential is the original position of the next frame frequency of current up sequential, believe one side only during for described received frame the descending absolute value of breath of the variation of described up sequential size;

Second adjustment unit is used to adjust the length of the transmit frame that this locality need send to described base station, if the breath that believes one side only during described received frame descending equals 0, does not then adjust the length of described transmit frame; If greater than 0, then increase the length of described transmit frame; If less than 0, then reduce the length of described transmit frame; The adjusting range of wherein said frame length is the Cyclic Prefix (CP) of a symbol in the described transmit frame, believe one side only during for described received frame the descending absolute value of breath of the variation of described frame length size.

Device provided by the invention, carry out uplink synchronous when adopting descending that the phase difference of receiving sequence and local sequence determines partially, can carry out uplink synchronous in real time, just can carry out uplink synchronous when having only the business datum of existence in the prior art compares, the problem that uplink loss can not occur has improved the reliability of network.

The all or part of step that the one of ordinary skill in the art will appreciate that the foregoing description program circuit that can use a computer is realized, described computer program can be stored in the computer-readable recording medium, described computer program (as system, unit, device etc.) on the relevant hardware platform is carried out, when carrying out, comprise one of step or its combination of method embodiment.

Alternatively, all or part of step of the foregoing description also can use integrated circuit to realize, these steps can be made into integrated circuit modules one by one respectively, perhaps a plurality of modules in them or step is made into the single integrated circuit module and realizes.Like this, the present invention is not restricted to any specific hardware and software combination.

Each device/functional module/functional unit in the foregoing description can adopt the general calculation device to realize, they can concentrate on the single calculation element, also can be distributed on the network that a plurality of calculation element forms.

Each device/functional module/functional unit in the foregoing description is realized with the form of software function module and during as independently production marketing or use, can be stored in the computer read/write memory medium.The above-mentioned computer read/write memory medium of mentioning can be a read-only memory, disk or CD etc.

The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the described protection range of claim.

Claims (8)

1. the method for a uplink synchronous in mobile communication system is characterized in that, comprising:

Obtain the receiving sequence and the local local sequence that sets in advance of a plurality of subframes in the local received frame;

According to the phase information of described a plurality of receiving sequences and described local sequence, breath believes one side only when obtaining described received frame descending;

The breath that believes one side only when adopting described received frame descending carries out uplink synchronous;

Wherein said received frame is that the base station sends and transmits the frame of back local reception through wireless channel.

2. method according to claim 1 is characterized in that, the breath that believes one side only during described received frame descending obtains in the following way:

Obtain the phase difference between identical consecutive points in described each receiving sequence and the described local sequence;

Breath believes one side only when obtaining each subframe in the described received frame descending according to the phase difference between described consecutive points;

The breath that believes one side only during according to each subframe in the described received frame descending, breath believes one side only when obtaining described received frame descending.

3. method according to claim 2 is characterized in that, the breath that believes one side only during each subframe descending in the described received frame is

The receiving sequence of subframe in the described received frame of r (k) expression wherein, the local local sequence of s (k) expression, * represents conjugation, and ∠ represents to get the computing of phase angle, and M represents the number of described receiving sequence or described local sequence mid point, k=0 wherein ..., M-1.

4. method according to claim 1 is characterized in that, described uplink synchronous comprises need carry out the adjustment of up sequential and length to the transmit frame that described base station sends to this locality,

The up sequential of wherein adjusting described transmit frame comprises: if the breath that believes one side only during described received frame descending equals 0, then the up sequential of described transmit frame is not adjusted; If greater than 0, then adjust the up sequential of described transmit frame backward; If less than 0, then adjust the up sequential of described transmit frame forward, the adjustment position of wherein said up sequential is the original position of the next frame frequency of current up sequential, believe one side only during for described received frame the descending absolute value of breath of the variation of described up sequential size;

The length of wherein adjusting described transmit frame comprises: if the breath that believes one side only during described received frame descending equals 0, then do not adjust the length of described transmit frame; If greater than 0, then increase the length of described transmit frame; If less than 0, then reduce the length of described transmit frame; The adjusting range of wherein said frame length is the Cyclic Prefix (CP) of a symbol in the described transmit frame, believe one side only during for described received frame the descending absolute value of breath of the variation of described frame length size.

5. the device of a uplink synchronous in mobile communication system is characterized in that, comprising:

First acquisition module is used for obtaining the receiving sequence of the local a plurality of subframes of received frame and the local sequence that this locality sets in advance;

Second acquisition module links to each other with described first acquisition module, is used for the phase information according to described a plurality of receiving sequences and described local sequence, and breath believes one side only when obtaining described received frame descending;

Synchronization module links to each other with described second acquisition module, and the breath that believes one side only when being used to adopt described received frame descending carries out uplink synchronous;

Wherein said received frame is that the base station sends and transmits the frame of back local reception through wireless channel.

6. device according to claim 5 is characterized in that, described second acquisition module comprises:

First acquiring unit is used for obtaining the phase difference between described each receiving sequence and the identical consecutive points of described local sequence;

Second acquisition unit links to each other with described first acquiring unit, and breath believes one side only when being used for obtaining each subframe in the described received frame descending according to the phase difference between described consecutive points;

The 3rd acquiring unit links to each other with described second acquisition unit, the breath that believes one side only when being used for according to each subframe in the described received frame descending, and breath believes one side only when obtaining described received frame descending.

7. device according to claim 6 is characterized in that, the breath that believes one side only during each subframe descending in the described received frame is

Wherein r (k) represents the receiving sequence of subframe in the described received frame, the local local sequence of s (k) expression; * represent conjugation, ∠ represents to get the computing of phase angle, and M represents the number of described receiving sequence or described local sequence mid point, k=0 wherein ..., M-1.

8. device according to claim 5 is characterized in that, described synchronization module comprises:

First adjustment unit is used to adjust the up sequential of the transmit frame that this locality need send to described base station, if the breath that believes one side only during described received frame descending equals 0, then the up sequential of described transmit frame is not adjusted; If greater than 0, then adjust the up sequential of described transmit frame backward; If less than 0, then adjust the up sequential of described transmit frame forward, the adjustment position of wherein said up sequential is the original position of the next frame frequency of current up sequential, believe one side only during for described received frame the descending absolute value of breath of the variation of described up sequential size;

Second adjustment unit is used to adjust the length of the transmit frame that this locality need send to described base station, if the breath that believes one side only during described received frame descending equals 0, does not then adjust the length of described transmit frame; If greater than 0, then increase the length of described transmit frame; If less than 0, then reduce the length of described transmit frame; The adjusting range of wherein said frame length is the Cyclic Prefix (CP) of a symbol in the described transmit frame, believe one side only during for described received frame the descending absolute value of breath of the variation of described frame length size.

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