CN102664721A - Transmitting and receiving method in cellular system - Google Patents

Abstract

The invention provides a transmitting and a receiving method in a cellular system. In a multicarriercellular system, a mobile station terminal itself uses a second syn code (Walsh code or GCL code) mapping to a second synchronizing channel, as a signal to determine which base station the subzone is from. The signal sent from the base station to the mobile station terminal is mapped to a wireless frame with a planar breadth of a frequency orientation and a time orientation. Along many parts, the wireless frame is embedded in the synchronizing channel mapped with the first synchronizing channel and the second synchronizing channel. Therefore, the second syn code of some serial number of the determined subzone or the subzone group is used as the second synchronizing channel to be mapped to the wireless frame, according to the ranking of the synchronizing channel to be mapped in the wireless frame, the second syn number is applied a phase rotation or a cycle shift using a wireless frame as a period and is mapped[a phase rotation or a cycle shift with one wireless frame as a period is performed upon the second syn code and mapping is performed. On the receiving side, then phase rotation angle or the cycle shift amount of the second syn code is acquired, so as to acquire the timing of the wireless frame front head.

Description

Sending method in the cellular system and method for reseptance

The application is that the original bill application number is the dividing an application of application for a patent for invention (international application no: PCT/JP2006/326223, the applying date: on December 28th, 2006, denomination of invention: dispensing device in the cellular system and receiving system) of No.200680056791.3.

Technical field

The present invention relates to dispensing device and receiving system in the cellular system.

Background technology

In cellular system, generally carry out searching the cell search processing of the sub-district that connects Radio Link by the mobile radio station terminal.Cell search uses the synchronizing channel that comprises in the radio frames of down link, and (Synchronization Channel SCH) carries out.And, except that synchronizing channel, also use intrinsic pilot channel in sub-district and broadcast message channel (Broadcast Channel, BCH) (list of references: non-patent literature 1) sometimes.

The 1st prior art of non-patent literature 2 records is described with reference to Figure 1A, B and Fig. 2.

In this prior art, in radio frames, send a plurality of SCH code elements.In each SCH code element, according to frequency direction multiplexing Generalized Chirp Like sequence (GCL sequence).

Figure 1A, B are the figure of the multiplexing state of expression SCH.

In Figure 1A, be made as the longitudinal axis to frequency direction, be made as transverse axis to time orientation, represent Radio Resource with this.And in the figure, how expression SCH uses Radio Resource to transmit.SCH is placed in the preposition of time orientation.S ₀, S ₁, S ₂, S ₃..., S _N-1Each code element of representing the GCL sequence code respectively.Each code element of GCL sequence code uses a number of sub-carrier to send according to the transmission timing of SCH.When the quantity of subcarrier was N, the GCL sequence code was to utilize S ₀～S _N-1The length that code element constitutes is the sign indicating number of N.

The sequence number of multiplexing GCL sequence changes on time orientation in each SCH code element.The pattern that changes is the good pattern of cross-correlation and autocorrelation performance (in non-patent literature 2, being called the frequency hopping code pattern), and the identifier of this modal representation identification sub-district (or cell set) and radio frames are regularly.That is, in time of the sequence number of the SCH code element of utilizing following formula to represent to send during changing pattern from the sub-district of the identifier g of identification sub-district or cell set,

$h^{\left(g\right)}=(h_0^{\left(g\right)},h_1^{\left(g\right)},h_2^{\left(g\right)},\·\·\·,h_{N_{\mathrm{sync}}-1}^{\left(g\right)})$

(wherein, N _SyncSCH code element number in the expression radio frames), multiplexing GCL sequence can utilize following formula to represent in i the SCH code element in radio frames.

$s_{h_i^{\left(g\right)}}\left(k\right)=\exp (-\mathrm{<figure-callout\; id="2"\; label="j"\; filenames="HDA0000137839090000012.png,HDA0000137839090000101.png"\; state="\{\{state\}\}">j</figure-callout>}2{\mathrm{\&pi;h}}_i^{\left(g\right)}\frac{k(k+1)}{{2N}_G})\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\left(1\right)$

Wherein, N _GThe sequence length of expression GCL sequence.And k representes the sequence number of code element.When k=0, represent first (the 0th) code element of this GCL sequence code.Below, k=1 representes the 1st code element ..., k=n representes n code element.

Figure 1B example the longitudinal axis be made as frequency, when being made as the time to transverse axis, the situation of 4 SCH of time division multiplexing in 1 radio frames.In the figure, the GCL sequence code of identifier g is carried out multiplexing as SCH.h ^(g) _iThe frequency hopping code pattern of using when being illustrated in the GCL sequence code that generates identifier g (call number).In Figure 1B, have 4 different GCL sequence codes of the sequence number specific same identifier of same cells utilized or cell set, the frequency hopping code pattern by time division multiplexing.

Fig. 2 is the figure of the example of expression frequency hopping code pattern.

In this table the expression be which row the frequency hopping code pattern be identifier g.For example, be 0 o'clock at identifier g, as the frequency hopping code pattern enumerate into 4,5,6,7,8}.At this, the length of frequency hopping code pattern is 5.Therefore, in the above example, each sequence number is h ⁽⁰⁾ ₀=4, h ⁽⁰⁾ ₁=5, h ⁽⁰⁾ ₂=6, h ⁽⁰⁾ ₃=7, h ⁽⁰⁾ ₄=8.Therefore, the frequency hopping code pattern among Fig. 2 can be used for the situation at 5 SCH of 1 radio frames time division multiplexing.

At receiver side, handle the code element and the subframe timing testing result of carrying out before according to the detection of the identifier of (or cell set) in the sub-district, the SCH code element is implemented FFT, and convert frequency field into.To from the signal of frequency field, extracting the subcarrier components that the GCL sequence code is re-used and carrying out the sequence that differential demodulation obtains and implement IDFT.Said differential demodulation refers to, when being made as S (n) to the code element of n sign indicating number, calculates S (n) * S* (n+1)=exp{j2 π h ^(g) _i(n+1)/N _G.Thus, the value that obtains through differential demodulation is with 2 π h ^(g) _i/ N _GThe rotation integral multiple obtains, so rotated several times through learning, knows N _G, can know h ^(g) _iIn fact carry out this processing to the whole SCH code elements in the radio frames, IDFT output is kept in the memory.Then; In order the frequency hopping code pattern to be carried out soft decision and to confirm; For whole cyclic shift mode computation metric of candidate's frequency hopping code pattern, identifier and the radio frames timing detection value of the frequency hopping code pattern that obtains peaked cyclic shift as sub-district (or cell set).Metric calculates as follows: for whole frequency hopping code patterns and whole circulation pattern thereof, the IDFT output valve of S (the n) * S* (n+1) that will obtain through above-mentioned differential decoding is respectively carried out addition, confirms as additive value the maximum the frequency hopping code pattern that should obtain.For example; In above-mentioned example; Save as the function of n to the 0th～the 4th IDFT output valve that obtains, the value when getting n=4, the value when getting n=5 about the IDFT output valve that obtains from the 1st SCH about the IDFT output valve that obtains from the 0th SCH for radio frames; Value when getting n=6 about the IDFT output valve that obtains from the 2nd SCH; Value when getting n=7 about the IDFT output valve that obtains from the 3rd SCH, the value when getting n=8 about the IDFT output valve that obtains from the 4th SCH is preserved these value phase adductions.Then, make the frequency hopping code cycle of modes displacement of giving, obtain additive value and preservation equally to n.And, also carry out identical calculating for the frequency hopping code pattern of other identifiers, and preserve additive value.And, after the frequency hopping code pattern for whole identifiers obtains additive value, search maximum wherein, obtain the identifier and the cyclic shift amount that have been endowed this peaked frequency hopping code pattern.

Non-patent literature 3 has been put down in writing other prior art.The 2nd prior art with reference to Fig. 3 A, B explanation non-patent literature 3.

In this prior art, in radio frames, send a plurality of SCH code elements.In each SCH code element, accord with and radio frames orthogonal code (for example Walsh sign indicating number) regularly according to the multiplexing expression cell group identification of frequency direction.Different with aforesaid prior art, the sequence number changing pattern of time orientation is not represented cell group identification symbol and radio frames regularly, and sequence number self expression cell group identification symbol and radio frames be (and other information) regularly.

In addition, show for the yardage that increases Secondary SCH (SSC Secondary Synchronisation Code) according to the mode of the multiplexing a plurality of orthogonal codes of frequency direction.Fig. 3 A representes the state according to the multiplexing Walsh sign indicating number of the frequency direction of SCH.At this, each code element W _i, i=0～N-1 is assigned in each number of sub-carrier, code length is N.According to the character of Walsh sign indicating number, the Walsh sign indicating number of length N has only the N kind.Therefore, shown in Fig. 3 B, be the Walsh sign indicating number of the length M of g and f according to the multiplexing identifier of frequency direction.At this, suppose 2M=N.At this moment and since to the Walsh of length M code combination the Walsh sign indicating number of length M, so the quantity of operable sign indicating number is M * M in the SCH of sub-carrier number N.As an example, when M=4, N=8, under the situation of Fig. 3 A, the quantity of operable Walsh sign indicating number is N=8, and under the situation of Fig. 3 B, M * M=16 learns that the quantity of operable sign indicating number increases.

At receiver side, according to the code element of carrying out before handling in the detection of the identifier of cell set and subframe testing result regularly, carry out the FFT of SCH code element, in frequency field, carry out relevant treatment, detected cells group identifier and the radio frames timing of SCH.

Patent documentation 1 discloses following technology: in order to improve the precision of transmission path estimation, the transmission phase place that makes each downlink frame is sent according to each TCH back of staggering.

Non-patent literature 1:3GPP TR25.814 V7.0.0

Non-patent literature 2:3GPP TSG-RAN WG1, R1-061117, " Comparison of One-SCH and Two-SCH schemes for EUTRA Cell Search ", ETRI

Non-patent literature 3:3GPP TSC-RAN WG1, R1-060780, " SCH Structure and Cell Search Method for E-UTRA Downlink ", NTT DoCoMo, NEC

Patent documentation 1: japanese kokai publication hei 10-126331 communique

In above-mentioned prior art; The sequence number of multiplexing sign indicating number sequence is different among each SCH in radio frames; So when the SCH of receiver side detects, need receive sign indicating number that SCH uses full sequence number to each and carry out IDFT etc., relevant treatment, have the bigger problem of treating capacity.

Summary of the invention

Problem of the present invention provides a kind of dispensing device and receiving system of cellular system, and this cellular system has the structure of the treating capacity of the detection processing that can reduce synchronizing channel.

Dispensing device of the present invention is at the multiplexing carrying signal and sending on the radio frames of a plurality of synchronizing channels according to time orientation; It is characterized in that; This dispensing device has transmitting element; This transmitting element is mapped to synchronizing channel with sign indicating number and sends, and this yard quilt has been implemented with the modulation of 1 radio frames as 1 cycle, and the size of this modulation depends on to be mapped with the position in this radio frames of synchronizing channel of sign indicating number multiplexing.

Receiving system of the present invention is received in the signal that carries on the radio frames that is mapped with sign indicating number; This yard quilt has been implemented with the modulation of 1 radio frames as 1 cycle; The size of this modulation depends on to be mapped with the position in this radio frames of synchronizing channel of sign indicating number multiplexing; Said receiving system is characterised in that this receiving system has: the definite unit of sign indicating number, and it confirms to be mapped to the sign indicating number of this synchronizing channel; With radio frames acquiring unit regularly, the size of the modulation that it confirms the sign indicating number that is mapped to this synchronizing channel is carried out is obtained the timing of the front of radio frames thus according to multiplexing position in the radio frames of synchronizing channel.

A kind of sending method; This sending method is carried out signal is placed on the time orientation multiplexing in the radio frames of a plurality of synchronizing channels and send said signal by transmitting apparatus; This sending method comprises: sign indicating number is mapped at least one of said synchronizing channel; Said sign indicating number has been implemented with the cyclic shift of a radio frames as one-period, and sends said sign indicating number.

A kind of method of reseptance; This method of reseptance is carried out to be received in multiplexing signal in the radio frames of a plurality of synchronizing channels on the time orientation by receiving equipment; This method of reseptance comprises: receiving code; Said sign indicating number has been carried out a certain amount of cyclic shift with a radio frames as one-period, and is mapped at least one in the said synchronizing channel.

According to the present invention,, synchronizing channel need not receive sign indicating number and the relevant treatment that synchronizing channel applies full sequence number when detecting, so can cut down treating capacity to each.

Description of drawings

Figure 1A be the expression SCH multiplexing state figure (one of).

Figure 1B is the figure (two) of the multiplexing state of expression SCH.

Fig. 2 is the figure of the example of expression frequency hopping code pattern.

Fig. 3 A be the explanation prior art the 2nd the example figure (one of).

Fig. 3 B is the figure (two) of the 2nd example of explanation prior art.

Fig. 4 be the explanation the 1st execution mode of the present invention figure (one of).

Fig. 5 is the figure (two) of explanation the 1st execution mode of the present invention.

Fig. 6 is the figure (three) of explanation the 1st execution mode of the present invention.

Fig. 7 be the explanation the 2nd execution mode of the present invention figure (one of).

Fig. 8 is the figure (two) of explanation the 2nd execution mode of the present invention.

Fig. 9 be the explanation the 3rd execution mode of the present invention figure (one of).

Figure 10 is the figure (two) of explanation the 3rd execution mode of the present invention.

Figure 11 is the figure (three) of explanation the 3rd execution mode of the present invention.

Embodiment

In embodiments of the present invention, at first as the 1st solution, the sequence number of multiplexing Walsh sign indicating number is identical in each SCH code element in radio frames, according to the position in radio frames, makes the Walsh sign indicating number carry out a certain amount of phase place rotation.The phase place rotation is with 1 wireless frame period closure.

Perhaps, as the 2nd solution, the sequence number of multiplexing GCL sequence is identical in each SCH code element in radio frames, according to the position in radio frames, makes the GCL sequence carry out a certain amount of cyclic shift.Cyclic shift is with 1 wireless frame period closure.

Below, execution mode of the present invention is specified.In addition, following execution mode be expression used first synchronizing channel timing synchronously with the cell group identification of having used SSC Secondary Synchronisation Code, the execution mode of the three stage cell search that used pilot channel, still the invention is not restricted to this as the basis.For example, also go for the situation that other time synchronization methods (referring to protection correlation method at interval for OFDM) and SSC Secondary Synchronisation Code are represented cell identifier.

Use Fig. 4～Fig. 6 that the 1st execution mode of the present invention is described.

The 1st execution mode is the most basic execution mode of the 1st solution.

Fig. 4 representes the topology example of base station apparatus.Data channel, pilot channel, first synchronizing channel, through the data-signal of the SSC Secondary Synchronisation Code behind phase place rotation processing portion 10 rotatable phases, in channel multiplexing portion 11, be re-used, in serial conversion process portion 12, carry out the serial conversion.After being converted into parallel signal, in IFFT handling part 13, data-signal is implemented contrary fourier transform, after becoming the signal of time zone, be endowed protection at interval in the insertion section 14 at interval in protection, send through wireless processing section 15, antenna 16.

Pilot channel is the contrast signal that data channel demodulation is used.First synchronizing channel is the signal that share the minizone of regularly synchronous usefulness.SSC Secondary Synchronisation Code is the Walsh sign indicating number of expression cell group identification symbol (or cell identifier).The Walsh sign indicating number is the sign indicating number that in W-CDMA etc., is used as spreading code, is that the degree of correlation with the intersymbol that belongs to different identifiers is the orthogonal code of 0 character.G Walsh sign indicating number W used in the base station that belongs to cell group identification symbol g _gSSC Secondary Synchronisation Code carries out the phase place rotation through phase place rotation processing portion 10 according to the position in the radio frames.The i in radio frames specifically, (i=0,1,2 ... N _Sync-1, wherein, N _SyncBeing the SCH number in the radio frames) the Walsh sign indicating number of multiplexing SSC Secondary Synchronisation Code rotates exp{j2 π i/N with phase place in the SCH code element _Sync.Thus, in radio frames, 1 cycle that phase place rotates a circle or phase place is rotated becomes the length of 1 radio frames.That is,

$\exp \left(\mathrm{<figure-callout\; id="2"\; label="j"\; filenames="HDA0000137839090000012.png,HDA0000137839090000101.png"\; state="\{\{state\}\}">j</figure-callout>}2\mathrm{\&pi;}\frac{i}{N_{\mathrm{sync}}}\right)W_g\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\left(2\right)$

In channel multiplexing portion 11, carry out each multiplexing of channel.In serial conversion process portion 12, will shine upon to subcarrier by the train of signal of channel multiplexing portion 11 inputs.In IFFT handling part 13, be the signal of time zone from the conversion of signals of frequency field, and generate effective code element.In protection at interval in the insertion section 14, duplicate the aft section of effective code element and append to the front of effective code element.After in wireless processing section 15, having implemented wireless processing such as up conversion, send from antenna 16.

Fig. 5 representes the topology example of radio frames.In the example of Fig. 5, pilot channel is configured in the front code element of subframe, and synchronizing channel is configured in the end code element of subframe.And first synchronizing channel and SSC Secondary Synchronisation Code quilt be frequency division multiplexing alternately.Fig. 5 is an example of channel multiplexing method after all, can not limit the present invention.And, the whole bag of tricks is also arranged about the mapping method of SSC Secondary Synchronisation Code.For example, can expect to shine upon the synchronous detection of first synchronizing channel according to absolute phase, can also carry out differential coding and shine upon as contrast signal.No matter be which kind of method, all can not limit the present invention.

Fig. 6 representes the topology example of the cell search handling part in the mobile radio station.

In phase I handling part 20; Known mode about being stored in the first synchronizing channel copy signal storage part 21 is the copy signal and the relevant treatment that receives signal of first synchronizing channel; Handle according to time zone by correlation processing unit 22; And by time average portion 23 averaging, then by the regularly timing of test section 24 detection acquisition maximum correlation value of subframe, as detecting subframe timing and detection FFT timing.

In second stage handling part 25, according to regularly, remove protection at interval by protection interval removal portion 26 at phase I handling part 20 detected FFT, through the FFT treatment conversion signal of frequency field by FFT handling part 27.Then, extract SSC Secondary Synchronisation Code by SSC Secondary Synchronisation Code extraction portion 28.At this moment, because radio frames regularly is unknown, so the phase place of the SSC Secondary Synchronisation Code that extracts also is unknown, but owing to the Walsh sign indicating number has been given by the predetermined the amount of phase rotation of transmitter side, so the amount of phase rotation of each SCH code element is known.By phase place rotation processing portion 29 each is received the SCH code element and implement and the phase place rotation opposite phases rotation of implementing at transmitter side, carry out time average by time average portion 30.At this, give to the amount of phase rotation of SCH differently because of the position of SCH code element in radio frames at transmitter side, learn that according to formula (2) unit quantity of phase place rotation is 2 π/N _SyncSo, implement the phase reversal rotation of this unit quantity.In correlation processing unit 31; Obtain and be stored in the degree of correlation of the candidate Walsh sign indicating number in the Candidate key storage part 32; Regularly judge to have peaked correlation and the amount of phase rotation thereof in the test section 33 in the SSC Secondary Synchronisation Code radio frames, thereby detect SSC Secondary Synchronisation Code and radio frames timing.That is, the amount of phase rotation of correlation is 2 π (i-1)/N _SyncSo,, can learn it is which the SCH code element in the radio frames through obtaining the value from the i of the order of the front of SCH code element of expression in the radio frames.The position of i SCH code element in the radio frames is the position of confirming from the front of radio frames, so learn the position of the front of radio frames.

In phase III handling part 35, portion 36 extracts pilot signal from the subcarrier that pilot channel is re-used by the pilot channel extraction.Obtain the pilot signal that extracts and the degree of correlation that is stored in the candidate scramble code in the candidate scramble code storage part 37 by correlation processing unit 38, carry out time average by time average portion 39.And, detect the candidate scramble code that obtains maximum correlation value by scrambler test section 40 from time average, as detecting scrambler.

Use Fig. 7 and Fig. 8 that the 2nd execution mode of the present invention is described.

In Fig. 7 and Fig. 8, for the inscape mark identical reference number identical with Fig. 4 and Fig. 6.

The 2nd execution mode is that the 1st solution is applicable to the execution mode that the mode of the yardage of the increase SSC Secondary Synchronisation Code of explanation in non-patent literature 3 obtains.

Fig. 7 representes the topology example of base station.Except SSC Secondary Synchronisation Code was made up of two sign indicating numbers (second synchronous code 1, second synchronous code 2), other architecture of base station examples with the 1st execution mode were identical.Second synchronous code 1 and second synchronous code 2 are implemented the phase place rotation processing respectively independently.Promptly, the i in radio frames (i=0,1,2 ... N _Sync-1, wherein, N _SyncBeing the SCH code element number in the radio frames) the second multiplexing synchronous code 1,2 is represented as follows respectively in the SCH code element.

$\exp \left(\mathrm{<figure-callout\; id="2"\; label="j"\; filenames="HDA0000137839090000012.png,HDA0000137839090000101.png"\; state="\{\{state\}\}">j</figure-callout>}2\mathrm{\&pi;}\frac{i}{N_{\mathrm{sync}}}\right){\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000137839090000011.png,HDA0000137839090000031.png"\; state="\{\{state\}\}">W</figure-callout>}}_{1,g}$

$\exp \left(\mathrm{<figure-callout\; id="2"\; label="j"\; filenames="HDA0000137839090000012.png,HDA0000137839090000101.png"\; state="\{\{state\}\}">j</figure-callout>}2\mathrm{\&pi;}\frac{i+d}{N_{\mathrm{sync}}}\right){\mathrm{<figure-callout\; id="2"\; label="W"\; filenames="HDA0000137839090000012.png,HDA0000137839090000101.png"\; state="\{\{state\}\}">W</figure-callout>}}_{2,g}$

D (=0,1 ..., N _Sync-1) the phase place rotation of expression second synchronous code 2 is with respect to the biasing of the phase place rotation of second synchronous code 1.The sequence number through making up this biasing, second synchronous code 1 and the sequence number of second synchronous code 2, the yardage of SSC Secondary Synchronisation Code becomes M * M * N _Sync, can increase to the N of non-patent literature 3 _SyncDoubly.Wherein, M representes the sequence length of second synchronous code 1 and second synchronous code 2.So constitute the phase place rotation of carrying out second synchronous code 1 at the phase place rotation processing 10-1 of portion, carry out the phase place rotation of second synchronous code 2 at the phase place rotation processing 10-2 of portion, multiplexing in channel multiplexing portion 11.

Fig. 8 representes the topology example of the cell search handling part in the mobile radio station.

Phase I handling part 20 is identical with the 1st execution mode with phase III handling part 35.The difference of second stage handling part 25a is, after the time average of time average portion 30, also has a sign indicating number separated part 50, and the regularly processing of test section 33 of SSC Secondary Synchronisation Code radio frames.In sign indicating number separated part 50, will in SSC Secondary Synchronisation Code, multiplexing two second synchronous codes 1,2 separate.In correlation processing unit 31, carry out the related operation that each receives second synchronous code and candidate Walsh sign indicating number.In SSC Secondary Synchronisation Code radio frames timing test section 33; Confirm second synchronous code sequence number separately from having peaked correlation; Judge the amount of phase rotation of the correlation of second synchronous code 1; Detect radio frames regularly, detect the phase difference of the maximum related value of second synchronous code 1,2, detect the phase place rotation biasing of transmitter side.

Use Fig. 9～Figure 11 that the 3rd execution mode of the present invention is described.

In Fig. 9, Figure 11, to the inscape identical mark with Fig. 4 and Fig. 6 identical with reference to label.

The 3rd execution mode is the execution mode of the 2nd solution.

Fig. 9 representes the topology example of base station apparatus.Second synchronous code is used the GCL sequence of expression cell group identification symbol (or cell identifier).In the part of prior art, be illustrated about the GCL sign indicating number, so please explain with reference to this.According to the position in the radio frames second synchronous code is implemented cyclic shift by cyclic shift handling part 10a.The i in radio frames specifically, (i=0,1,2 ... N _Sync-1, wherein, N _SyncBe the SCH number in the radio frames) multiplexing SSC Secondary Synchronisation Code cyclic shift id only in the SCH code element.Cyclic shift finishes 1 cycle 1 radio frames.That is, the relation of following formula is set up.

N _syncd＝L _S-SCH·····(3)

Wherein, L _S-SCHThe sequence length of representing second synchronous code.

, L _S-SCHLong-pending form suc as formula utilizing integer shown in (3) is represented, but the sequence length of GCL sequence must be a prime number, so L _S-SCHThe sequence length L of the GCL sequence of using with second synchronous code _GCLUnequal (according to the relation of formula (3), L _S-SCHCan not prime number).Therefore, can consider following method, compression has greater than L _S-SCHThe method of GCL sequence of sequence length of prime number of minimum, utilize 0 to fill and have less than L _S-SCHMaximum prime number sequence length the GCL sequence, or reuse the method etc. of the part of sign indicating number.When the GCL sequence code was prime number at sequence length, the characteristic of autocorrelation performance etc. reached best, but as described above, even the length of adjustment sequence length also has using enough characteristics with the SCH mapping.Perhaps and since based on the detection of the GCL sequence of IDFT and sequence length be prime number it doesn't matter, so think and also can use length and L _S-SCHThe GCL sequence that equates (because sequence length is not a prime number, so can not be called the GCL sequence simply).

And, through cyclic shift is applied initial bias δ (=0,1 ..., d-1), according to the GCL sequence number that uses in second synchronous code and the combination of initial bias, can increase the operable yardage of second synchronous code.

Figure 10 representes the wireless frame structure example.

In the example of Figure 10, pilot channel is configured in the front code element of subframe, and synchronizing channel is configured in the end code element of subframe.And first synchronizing channel and SSC Secondary Synchronisation Code be frequency division multiplexing alternately.Figure 10 is an example of channel multiplexing method after all, can not limit the present invention.And, the whole bag of tricks is also arranged about the mapping method of SSC Secondary Synchronisation Code.For example, can expect to shine upon the synchronous detection of first synchronizing channel according to absolute phase, can also carry out differential coding and shine upon as contrast signal.No matter be which kind of method, all can not limit the present invention.

Shown in figure 10, in the SCH code element of the 0th SSC Secondary Synchronisation Code, use the not GCL sequence code (S of cyclic shift ₀, S ₁..., S _L-2, S _L-1), but in i SCH code element, make the GCL sequence code (S behind the identical GCL sequence code cyclic shift id _L-id, S _L-id+1..., S _L-id-2, S _L-id-1).

Figure 11 representes the topology example of the cell search handling part in the mobile radio station.

Phase I handling part 20 is identical with the 1st execution mode with phase III handling part 35.In second stage handling part 25b, according to regularly, remove protection at interval by protection interval removal portion 26 at phase I handling part 20 detected FFT, through the FFT treatment conversion signal of frequency field by FFT handling part 27.Then, extract the GCL sequence that is mapped to SSC Secondary Synchronisation Code.At this moment because radio frames regularly is unknown, so receive the GCL sequence the starting position (be with radio frames in which SCH GCL sequence code of shining upon) also be unknown, but the unit cyclic shift amount of SCH code element is known.Therefore, in the phase place rotation processing 29a of portion, at receiver side each is received the SCH code element and implement and the opposite cyclic shift of implementing at transmitter side of unit cyclic shift, carry out time average.In differential lsb decoder 55, carry out differential decoding to receiving the GCL sequence.About differential decoding is the processing that utilizes following formula to represent.

D(n)＝R(n)R ^*(n+1)

Wherein, R (n) expression receives n code element of GCL sequence.In IDFT handling part 56, differential lsb decoder output carrying out IDFT is handled.The IDFT process result utilizes following formula to represent.

$\mathrm{\&psi;}\left(k\right)=\underset{n=0}{\overset{n=L_{\mathrm{GCL}}-1}{\mathrm{\&Sigma;}}}D\left(n\right)\exp \left(\mathrm{<figure-callout\; id="2"\; label="j"\; filenames="HDA0000137839090000012.png,HDA0000137839090000101.png"\; state="\{\{state\}\}">j</figure-callout>}2\mathrm{\&pi;}\frac{\mathrm{nk}}{L_{\mathrm{GCL}}}\right)$

In IDFT output peak value test section 57, the power output of IDFT handling part 56 | φ (k) | ²K for maximum _MaxAs detecting the GCL sequence number.It is identical with the principle of explanation in the prior art that this detects the principle of GCL sequence number.In cyclic shift correlation processing unit 59, read in the GCL sequence copy s (n-d) that detects the GCL sequence number from GCL sequence copy storage part 60, to cyclic shift d=0～L _GCL-1 carries out and the relevant treatment that receives the GCL sequence.

$\mathrm{\&Psi;}\left(d\right)=\underset{n=0}{\overset{n=L_{\mathrm{GCL}}-1}{\mathrm{\&Sigma;}}}R\left(n\right)s^{*}(n-d)$

In the relevant output of cyclic shift peak value test section 60, | ψ (d) | ²D for maximum _MaxAs detecting cyclic shift.d _MaxSo the cyclic shift amount of the GCL sequence code that expression receives is the GCL sequence code of the mapping of which SCH in expression and the radio frames.Owing to learn in advance from the front of radio frames to the time difference of SCH code element, so through learning d _Max, can know that radio frames regularly.

Regularly, then learn the position of the front of radio frames, if learn radio frames so can receive data.

Claims (14)

1. sending method, this sending method is carried out signal is placed on the time orientation multiplexing in the radio frames of a plurality of synchronizing channels and send said signal by transmitting apparatus, and this sending method comprises:

Sign indicating number is mapped at least one of said synchronizing channel, said sign indicating number has been implemented with the cyclic shift of a radio frames as one-period, and

Send said sign indicating number.

2. sending method as claimed in claim 1 is characterized in that,

According to the position in said each comfortable said radio frames of sign indicating number, said sign indicating number is carried out a certain amount of cyclic shift respectively.

3. sending method as claimed in claim 1 is characterized in that,

Each said sign indicating number is the different sequences that are shifted and generate through to given sign indicating number.

4. sending method as claimed in claim 1 is characterized in that,

Each said sign indicating number is a plurality of yards different combination of sequence.

5. sending method as claimed in claim 1 is characterized in that,

Each said sign indicating number is the different sequences that generated by same processing unit.

6. like each described sending method among the claim 1-5, it is characterized in that,

Each said sign indicating number is used for confirming sub-district or cell set at cellular system.

7. method of reseptance, this method of reseptance is carried out to be received in multiplexing signal in the radio frames of a plurality of synchronizing channels on the time orientation by receiving equipment, and this method of reseptance comprises:

Receiving code, said sign indicating number has been carried out a certain amount of cyclic shift with a radio frames as one-period, and is mapped at least one in the said synchronizing channel.

8. method of reseptance as claimed in claim 7 is characterized in that,

Each said sign indicating number has been carried out a certain amount of cyclic shift according to the position in said each comfortable said radio frames of sign indicating number.

9. method of reseptance as claimed in claim 7 is characterized in that,

Each said sign indicating number is the different sequences that are shifted and generate through to given sign indicating number.

10. method of reseptance as claimed in claim 7 is characterized in that,

Each said sign indicating number is a plurality of yards different combination of sequence.

11. method of reseptance as claimed in claim 7 is characterized in that,

Each said sign indicating number is the different sequences that generated by same processing unit.

12., it is characterized in that this method of reseptance also comprises like each described method of reseptance among the claim 7-11:

Obtain the frame head timing of said radio frames according to the sign indicating number that receives by radio frames timing acquiring unit.

13., it is characterized in that this method of reseptance also comprises like each described method of reseptance among the claim 7-11:

Signal and replica code that utilization is mapped on the synchronizing channel of reception are confirmed said sign indicating number.

14. like each described method of reseptance among the claim 7-11, it is characterized in that,

Each said sign indicating number is used for confirming sub-district or cell set at cellular system.

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