CN102484530B - Method for determining cell identity in wireless communication system and apparatus therefor - Google Patents
Method for determining cell identity in wireless communication system and apparatus therefor Download PDFInfo
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- 238000004891 communication Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000012163 sequencing technique Methods 0.000 claims description 59
- 230000008685 targeting Effects 0.000 claims description 59
- 238000010586 diagram Methods 0.000 description 18
- 230000006870 function Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000013507 mapping Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
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- 239000000969 carrier Substances 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
- H04L27/2692—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with preamble design, i.e. with negotiation of the synchronisation sequence with transmitter or sequence linked to the algorithm used at the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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Abstract
A method of determining a cell identity in a wireless communication system is disclosed. The present invention includes the steps of obtaining a segment ID and a sequence index from an SA-preamble (secondary advanced preamble) sequence received from a base station and determining the cell identity using the segment ID and the sequence index. In this case, the cell identity corresponds to one SA-preamble sequence and a cell identity adjacent to the cell identity corresponds to an SA-preamble sequence having a complex conjugate relation of the one SA-preamble sequence.
Description
Technical field
The present invention relates to wireless communication system, and relate more specifically to method and the device of the cell ID in a kind of definite wireless communication system.
Background technology
First, Fig. 1 illustrates a kind of wireless communication system.With reference to figure 1, wireless communication system 100 is comprised of a plurality of base stations 110 and a plurality of mobile radio station 120.Wireless communication system 100 comprises homogeneous network and heterogeneous network.In the case, heterogeneous network represents the network coexisting comprising different network entities such as macrocell, femto base station, relayings.The fixed station that base station normally communicates with mobile radio station.And base station 110a, 110b and 110c provide service to specific geographic area 102a, 102b and 102c respectively.In order to improve systematic function, each specific geographic area for example can be divided into again a plurality of less region 104a, 104b and 104c.Each less region can called after community, sector or section.In IEEE 802.16e system, cell ID (cell_ID or IDCell) is endowed with reference to whole system.On the contrary, sector or section sign is to provide the specific region of service to give with reference to each base station wherein, and has the value that is set in 0 to 2 one of them.Mobile radio station 120 be conventionally distributed in wireless communication system and be fix or movably.Each mobile radio station can communicate with at least one base station random constantly in up link (UL) or down link (DL).Base station and mobile radio station use following system one of them communicate each other, comprise CDMA (code division multiple access) system, FDMA (frequency division multiple access) system, TDMA (time division multiple access) system, SC-TDMA (single-carrier frequency division multiple access) system, MC-FDMA (multi-carrier frequency division multiple access) system, OFDMA (OFDM) system and combination thereof etc.In this is open, the communication link of " up link " indication from mobile radio station to base station, and the communication link of " down link " indication from base station to mobile radio station.
Summary of the invention
Technical problem
Correspondingly, the present invention is directed to method and the device of the cell ID in a kind of definite wireless communication system, it has eliminated the one or more problems that cause due to the restriction of prior art and shortcoming substantially.
The method and the device that the object of this invention is to provide the cell ID in a kind of definite wireless communication system.
Other feature and advantage of the present invention will be set forth in follow-up specification, and will be in part apparent according to specification, maybe can the acquistion by putting into practice the present invention.The structure particularly pointing out in specification by writing and claim and appended accompanying drawing is realized and obtains object of the present invention and other advantages.
Technical scheme
In order to obtain these and other advantages and according to object of the present invention, as enforcement and briefly describing, the method of determining the cell ID in communication system comprises the following steps: from being received from SA leading (auxiliary senior leading) retrieval section ID and the sequence index of base station, and use described section ID and described sequence index to determine described cell ID, wherein said cell ID is corresponding to a SA targeting sequencing, and wherein the cell ID adjacent with described cell ID corresponding to the leading SA targeting sequencing with complex conjugate relationship of a described SA.
Preferably, by following formula determine described cell ID: IDcell=256*n+Idx (wherein n is section ID and has the value that is set to 0,1 or 2, wherein Idx by
determine, and wherein q is sequence index the integer value with scope from 0 to 255).
More preferably, corresponding to the SA targeting sequencing of the sequence index x of a section ID and the SA targeting sequencing of sequence index x+128 corresponding to a described section ID, there is complex conjugate relation.
More preferably, according to cell type, divide described sequence index.In the case, described cell type comprises grand ABS (senior base station), public ABS and CSG (closed user group) femto ABS.
In order further to realize these and other advantages and according to object of the present invention, a kind of mobile radio station, comprising: receiver module, it receives the SA receiving from base station leading (auxiliary senior leading) sequence; And processor, it determines described cell ID by the section ID and the sequence index that are included in received SA targeting sequencing, wherein said cell ID is corresponding to a SA targeting sequencing, and wherein the cell ID adjacent with described cell ID corresponding to the leading SA targeting sequencing with complex conjugate relationship of a described SA.
Preferably, by following formula determine described cell ID: IDcell=256*n+Idx (wherein n is section ID and has the value that is set to 0,1 or 2, wherein Idx by
determine, and wherein q is sequence index the integer value with scope from 0 to 255).
More preferably, corresponding to the SA targeting sequencing of the sequence index 0 to 127 of a section ID and the SA targeting sequencing of sequence index 128 to 255 corresponding to a described section ID, there is complex conjugate relation.
More preferably, according to cell type, divide described sequence index.In the case, described cell type comprises grand ABS (senior base station), public ABS and CSG (closed user group) femto ABS.
Should be appreciated that general description above and the following detailed description are all exemplary with indicative, and aim to provide claimed of the present invention further explanation.
Beneficial effect
Therefore, the invention provides following effect and advantage.
First, the present invention can more effectively determine the cell ID in IEE802.16m wireless communication system.
Secondly, the present invention can use the SA receiving from base station leading (auxiliary senior leading) detected cells sign effectively.
Accompanying drawing explanation
Accompanying drawing is included to provide a further understanding of the present invention, is merged in this specification and forms the part of specification, and accompanying drawing shows embodiments of the invention, and is used from and explains principle of the present invention with specification one.
In the accompanying drawings:
Fig. 1 is the diagram of example wireless communication system;
Fig. 2 is the block diagram for the transmitter and receiver example of OFDMA and SC-FDMA;
Fig. 3 is according to the diagram of the wireless frame structure of the dual-mode in IEEE 802.16m system;
Fig. 4 sends the diagram of the example of synchronizing channel in IEEE 802.16m system;
Fig. 5 is the diagram with the example of the subcarrier leading with the PA of its mapping;
Fig. 6 is by the leading diagram that is mapped to the example of frequency domain of SA;
Fig. 7 is the diagram for 512-FFT example of SA preamble structure in frequency domain;
Fig. 8 to Figure 10 is the diagram of the leading example of SA in MIMO antenna system;
Figure 11 to Figure 13 is the diagram of the example of cell ID and SA targeting sequencing being shone upon each other according to embodiments of the invention.
Figure 14 is the diagram of the example of transmitter and receiver according to an embodiment of the invention.
Embodiment
With detailed reference to the preferred embodiments of the present invention, its example is shown in the drawings.First, embodiments of the invention are in the following description technical characterictic of the present invention to be applied to the example of the system of using a plurality of orthogonal sub-carriers.For described below clear and convenient for the purpose of, for example by IEEE 802.16 systems, the present invention is described.And the present invention is applicable to various wireless communication systems, comprise 3GPP (third generation partner program) system.
Fig. 2 is the block diagram for the example of the transmitter and receiver of OFDMA and SC-FDMA.In up link, transmitter can comprise a part for mobile radio station, and receiver can comprise a part for base station.In down link, transmitter can comprise a part for base station, and receiver can comprise a part for mobile radio station.
With reference to figure 2, OFDMA transmitter comprises that deserializer 202, subcarrier mapping block 206, M point IDFT (discrete fourier inverse transformation) module 208, Cyclic Prefix (CP) add module 210, parallel-to-serial converter 212 and RF/DAC (radio frequency/digital-to-analogue) conversion module 214.
Signal processing in OFDMA transmitter is described below.First, bit stream is modulated into data symbol sequence.Particularly, can comprise chnnel coding by the data block of transmitting from MAC (media access control) layer is carried out, interweave, the various signals of scrambling etc. process and obtain bit stream.Bit stream is often called code word and is equal to the data block receiving from MAC layer.And the data block receiving from MAC layer also can be called transmission block.Modulation scheme is not limited to above description, and can comprise BPSK (binary phase shift keying), QPSK (Quadrature Phase Shift Keying), n-QAM (n quadrature amplitude modulation) etc. one of them.Next, serial data symbol sebolic addressing converts a parallel N data symbol [202] to.N data sign map is to N the subcarrier being distributed in whole M subcarrier, and remaining (M-N) individual subcarrier is filled up [206] with 0.The data symbol shining upon in frequency domain is processed and is transformed into time domain sequences [208] by M point IDFT.Subsequently, in order to reduce intersymbol interference (ISI) and inter-carrier interference (ICI), by being added to, Cyclic Prefix in time domain sequences, generates OFDMA symbol [210].The OFDMA symbol generating is converted to serial [s21] from walking abreast.Then, by digital-to-analogue conversion, up-conversion etc., OFDMA symbol is sent to receiver [214].And the available subcarrier in remaining (M-N) individual subcarrier is assigned to another user.Meanwhile, OFDMA receiver comprises that RF/ADC (radio frequency/analog to digital converter) module 216, deserializer 218, CP remove (CP removal) module 220, M point DFT (discrete Fourier transform) module 224, subcarrier demapping/balance module 226, parallel-to-serial converter 228 and detection module 230.The signal processing of OFDMA receiver has the configuration contrary with the signal processing of OFDMA transmitter.
, compare with OFDMA transmitter, SC-FDMA transmitter is also included in the N point DFT module 204 after subcarrier mapping block 206 meanwhile.SC-FDMA transmitter is processed previous DFT by IDFT and in frequency domain, is expanded a plurality of data, thereby PAPR (peak-to-average power ratio) is reduced to the level lower than OFDMA system.Compare with OFDMA receiver, SC-FDMA receiver also comprises the N point IDFT module 228 near subcarrier demapping module 226.And the signal processing of SC-FDMA receiver has the configuration contrary with the signal processing of SC-FDMA transmitter.
The module illustrating in Fig. 2 is only for above description.This transmitter and/or receiver can also comprise the module that at least one is necessary.Can clipped module/function, or module/function can be separated in different module/functions.At least two in module can be integrated in a module.
Fig. 3 is the diagram of the wireless frame structure example in IEEE 802.16m system.
With reference to figure 3, wireless frame structure comprises that 20ms superframe SU0 is to SU3, and it can support 5MHz, 8.75MHz, 10MHz or 20MHz.Superframe comprises that 4 mutually the same 5ms frame F0 of size are to F3, and starts with superframe head (SFH).Superframe head carries important system parameters and system configuration information.
Frame comprises that 8 subframe SF0 are to SF7.Sub-frame allocation is to down link or ul transmissions.Subframe comprises a plurality of OFDM symbols in time domain, or comprises a plurality of subcarriers in frequency domain.According to multiple access system, OFDM symbol can be called OFDMA symbol, SC-FDMA symbol etc.Can diversely revise the number that is included in the OFDM symbol in subframe according to channel width, CP length etc.
OFDMA symbol comprises a plurality of subcarriers.And, according to the size of FFT (fast Fourier transform), determine the number of subcarrier.The type of subcarrier can be categorized as data subcarrier for transfer of data, for the pilot sub-carrier of channel measurement with for the protection of the gap carrier wave of band and DC component.For characterizing the parameter of OFDM symbol, comprise BW, Nused, n, G etc.BW is nominal channel bandwidth.Nused is the number for the subcarrier of signal transmission.N is decimation factor and determines subcarrier spacing and useful symbol time with BW together with Nused.And, the ratio of G indication CP type to the useful time.
Table 1 illustrates the example of OFDMA parameter.
[table 1]
Fig. 4 sends the diagram of the example of synchronizing channel in IEEE 802.16m system.
With reference to figure 4, in IEEE 802.16m system, on a superframe SUl～SU4, carry 4 synchronizing channels.In IEEE 802.16m system, downlink Synchronization Channel comprises primary synchronization channel and auxiliary synchronization channel.Primary synchronization channel comprises PA leading (main senior leading).And auxiliary synchronization channel comprises SA leading (auxiliary senior leading).In FDD or tdd mode, can send downlink Synchronization Channel via an OFDMA symbol of frame.
PA is leading is generally used for obtaining partial information, such as communication system frequency bandwidth information, subcarrier configuration information etc.SA is leading is generally used for obtaining cell ID can be for the purposes of measuring such as RSSI (received signal strength indicator) etc.Via the first frame FO, send PA leading, can to FO3, send SA via the second to the 4th frame FO1 leading simultaneously.
Fig. 5 is the diagram with the example of the subcarrier leading with the PA of its mapping.
With reference to figure 5, the leading length of PA is 216 and irrelevant with FFT size.With the interval of 2 subcarriers, insert PA leading, and remaining part is filled with 0.For example, PA leading can be inserted in subcarrier 41,43 ..., in 469 and 471.PA leading can carrying system bandwidth information, subcarrier configuration information etc.If sub-carrier indices 256 retains as DC, can use formula 1 to determine to have the subcarrier with the sequence of its mapping.
[formula 1]
PA preamble carrier set (PAPreambleCarrierSet)=2 * k+41
In formula 1, the integer of " k " expression scope from 0 to 215.
For example, it is leading that the QPSK type sequence that the length proposing in table 2 is 216 can be used for PA.
[table 2]
Fig. 6 is by the leading diagram that is mapped to the example of frequency domain of SA.
With reference to figure 6, can change the number of distributing to the leading subcarrier of SA according to FFT size.For example, for 512-FFT, the leading length of SA can be 144, and for 1024-FFT, the leading length of SA can be 288, and for 2048-FFT, the leading length of SA can be 576.If 256th, the 512nd and the 1024th subcarrier is left respectively the DC component for 512-FFT, 1024-FFT and 2048-FFT, can determines and distribute to the leading subcarrier of SA by formula 2.
[formula 2]
The set of SA preamble carrier
In formula 2, n is SA preamble carrier set index, its value of being set to 0,1 or 2, and indication section ID.N
sAPthe number of the leading subcarrier of SA is distributed in indication.And k indicating range is from 0 to N
sAP-1 integer.
Each community has cell ID (IDCell), and it is expressed as the integer of scope from 0 to 767.Cell ID is defined as Sector Index and gives the index of each section.Conventionally, can determine cell ID by formula 3.
[formula 3]
IDCell＝256×n+q
In formula 3, n is SA preamble carrier set index, its value of being set to 0,1 or 2, and indication section ID.Q is the integer of SA targeting sequencing index indicating range from 0 to 255.
The in the situation that of 512-FFT, 288 bit SA are leading is divided into 8 sub-block A, B, C, D, E, F, G and H.And the length of each sub-block is 36 bits.Each section ID has different sequence sub-blocks.
Follow-up leading by describing the SA defining in 802.16m system in detail.The in the situation that of 512-FFT, A, B, C, D, E, F, G and H are by order modulation and be mapped to subsequently the SA conductor carrier set corresponding with this section ID.When FFT size increases, with same order, repeat basic block A, B, C, D, E, F, G and H.For example, the in the situation that of 1024-FFT, E, F, G, H, A, B, C, D, E, F, G, H, A, B, C and D are by order modulation and be mapped to subsequently the SA conductor carrier set corresponding with section ID.
Cyclic shift is applicable to according to 3 continuous subcarriers after the subcarrier mapping of formula 2.Each sub-block has identical skew, and the cyclic shift pattern of each sub-block become [2,1,0 ..., 2,1,0 ..., 2,1,0,2,1,0, DC, 1,0,2,1,0,2 ..., 1,0,2 ..., 1,0,2].Fig. 7 illustrates the example for 512-FFT SA preamble structure in frequency domain.The in the situation that of 512-FFT size, piece A, B, C, D, E, F, G and H can experience respectively right cyclic shift (0,2,1,0,1,0,2,1).
Fig. 8 to 10 is diagrams of the leading example of SA in MIMO antenna system.Fig. 8 illustrates the example in 512-FFT situation.Fig. 9 illustrates the example in 1024-FFT situation.And Figure 10 illustrates the example in 2048-FFT situation.
With reference to figure 8 to 10, SA is leading, can on a plurality of antennas, interweave.And the leading method of the SA that interweaves is not limited.For example, if MIMO antenna system comprises 2n transmitting antenna, the SA that can interweave by the scheme illustrating in table 3 is leading.For the purpose of clear and convenient, 8 continuous sub-blocks E, and F, G, H, A, B, C, D} called after piece, and symbol definition is as follows:
-N
t: the number of transmitting antenna
-N
b: the total number of piece
-N
s: the total number (8 * N of sub-block
b)
-N
bt: the piece number (N of each antenna
b/ N
t)
-N
st: the sub-block number (N of each antenna
s/ N
t)
[table 3]
Can in transmitting antenna, be rotated in the structure sending in each frame.For example, consider that 512-FFT system has 4 antennas, in f frame, [A, 0,0,0, E, 0,0,0] sends via the first antenna, and [0,0,0, D, 0,0,0, H] can send via the 4th antenna.Subsequently, in (f+1) frame, [0,0,0, D, 0,0,0, H] sends via the first antenna, and [A, 0,0,0, E, 0,0,0] can send via the 4th antenna.
Table 4 exemplarily illustrates 128 SA targeting sequencings to 6.16 system forms are indicated and be expressed as to auxiliary sequence by index q.Table 4 can be distinguished respective segments 0 to 2 to 6.Table 4 to 6 in, blk indication forms the sub-block of each sequence.
Can pass through X
i (q)(X=A, B, C, D, E, F, G, H) is transformed into QPSK symbol v
2i (q)and v
2i+1 (q)obtain modulation sequence.In this case, the integer of i indicating range from 0 to 8, and the integer of q indicating range from 0 to 127.Formula 4 illustrates X
i (q)the example of 2 QPSK symbols of conversion.
[formula 4]
In formula 4,
By formula 4, binary digit 00,01,10 and 11 is transformed into respectively 1, j ,-1 ,-j.This is exemplary.But can use similar different formula by X
i (q)be transformed into QPSK symbol.
For example, if sequence index q is 0, the sequence of sub-block A is 314C8648F.And this sequence modulation becomes QPSK signal [+1-j+1+j+j+1-j+1-1+1+j-1+j+1-1+1-j-j].
Meanwhile, using complex conjugate operation can be twice by 128 sequence extension that exemplarily illustrate in each table.Particularly, by complex conjugate operation, can generate in addition 128 sequences, and the sequence that index 128 to 255 can be generated respectively.In other words, corresponding to the SA targeting sequencing of the sequence index x of a section ID and the SA targeting sequencing of sequence index x+128 corresponding to this section ID, there is complex conjugate relationship.Formula 5 represents the sequence from auxiliary sequence expansion by complex conjugate operation.
[formula 5]
In formula 5, k indicating range is from 0 to N
sAP-1 integer, N
sAPthe leading length of indication SA.Complex conjugate operation ()
*complex signal (a+jb) is become to complex signal (a-jb), and complex signal (a-jb) is become to complex signal (a+jb).
Table 4
N=0:(section 0)
[table 5]
N=1 (section 1):
[table 6]
N=2 (section 2):
As mentioned in description above, SA is leading for obtaining cell ID and determining corresponding ABS type.This will explain in detail following.
First, according to ABS type, by each section partition, be 256 cell IDs.Particularly, with the sequence index q of scope in formula 3 from 0 to 85 corresponding to grand ABS (senior base station), scope from 86 to z sequence index q corresponding to public ABS, and scope is carried out the division of each section from the sequence index q of z to 255 corresponding to the mode of CSG (closed user group) femto ABS.
In the case, because mobile radio station has been known the type of the ABS accessing by this mobile radio station, so mobile radio station is to detect the sequence of mating by the auto-correlation of the SA targeting sequencing receiving from base station or cross-correlation with the auto-correlation of the SA targeting sequencing of cell ID corresponding to existing specific division or the mode that cross-correlation compares.As a result, mobile radio station obtains section ID n and index q value from the SA targeting sequencing of coupling, and by formula 3, determines cell ID subsequently.
Yet with reference to figure 4 to 6, each section has only been determined 128 SA targeting sequencings.Complex conjugate operation by formula 5 has been expanded 128 residue sequences according to auxiliary sequence.In this case, if determine cell unit by formula 3, no matter relation how between SA targeting sequencing, cell ID is all mapped to SA targeting sequencing as continuous integer value, and mobile radio station must compare the SA targeting sequencing of the SA targeting sequencing of all cell IDs corresponding to existing in particular division and reception.Therefore the problem, causing is to have increased the complexity detecting.
According to the present invention, the SA targeting sequencing index q that replaces 256 SA targeting sequencings of the every section of use, the SA targeting sequencing set of 128 SA targeting sequencings shown in one of them of expansion table 4 to 6 (index 0 to 127) is to generate the SA targeting sequencing set (index 128 to 255) of 128 residue SA targeting sequencings.In the case, the present invention proposes to determine cell ID by formula 6.
[formula 6]
IDcell＝256＊n+Idx
In formula 6, n is SA preamble carrier set index, has the value that is set to 0,1 or 2, and indication section ID.The integer of Idx indicating range from 0 to 255, and determine by formula 7.
[formula 7]
In formula 7, q is sequence index, comprises the integer that is set to 0 to 255, and obtains by SA targeting sequencing.
In order to process various ABS types, according to ABS type, each section partition cell ID is also shone upon to this cell ID subsequently.Particularly, carry out and divide as follows.First, the Idx of the cell ID of every section (0 to 85) is corresponding to grand ABS, and Idx (86 to z) is corresponding to public ABS, and Idx (z to 255) is corresponding to CGS femto ABS.
Figure 11 to 13 is diagrams of the example of cell ID and SA targeting sequencing being shone upon each other according to embodiments of the invention.Particularly, it is 0 situation that Figure 11 illustrates section ID, and it is 1 situation that Figure 12 illustrates section ID, and Figure 13 section ID is shown is 2 situation.
With reference to Figure 11, visible neighbor cell sign 0 and 1 corresponds respectively to SA targeting sequencing index (q) 0 and 128.Visible neighbor cell sign 2 and 3 corresponds respectively to SA targeting sequencing index (q) 1 and 129.And visible neighbor cell sign 254 and 255 corresponds respectively to SA targeting sequencing index (q) 127 and 255.
Meanwhile, according to formula 5, there is complex conjugate relation in the SA targeting sequencing of index 0 and the SA targeting sequencing of index 128.Equally, there is complex conjugate relation in the SA targeting sequencing of index 1 and the SA targeting sequencing of index 129.And there is complex conjugate relation in the SA targeting sequencing of index 127 and the SA targeting sequencing of index 255.
Therefore, according to the every section of ABS type, divide altogether in the situation of 256 cell IDs the leading auxiliary sequence of SA and being present in same division with the complex conjugate SA targeting sequencing of the leading auxiliary sequence of SA.Under these circumstances, mobile radio station matches by the leading auxiliary sequence of SA with the SA targeting sequencing that the leading auxiliary sequence of this SA has a complex conjugate relationship, and subsequently by reception SA targeting sequencing and this is to comparing.Therefore, Sequence Detection complexity can be reduced to half as much as possible.
For example, suppose that the ABS type being accessed by mobile radio station is public ABS, this mobile radio station compares the SA targeting sequencing of the corresponding SA targeting sequencing of the cell ID with every section Idx 86 to z and reception to detect the SA targeting sequencing matching with the SA targeting sequencing receiving.In the case, due to the leading auxiliary sequence of SA with the complex conjugate SA targeting sequencing of the leading auxiliary sequence of this SA, co-exist in according in the division of the Idx 86 to z of formula 6 and formula 7, so mobile radio station matches by the leading auxiliary sequence of SA with the SA targeting sequencing that the leading auxiliary sequence of this SA has a complex conjugate relationship, and subsequently by the SA targeting sequencing of reception and this is to comparing.
That is to say, by cell ID according to the present invention, determine method, in the situation that use auto-correlation or cross-correlation to determine whether the sequence of sequence index 0 matches with the SA targeting sequencing receiving, can in the situation that not using auto-correlation or cross-correlation, determine whether the sequence of sequence index 128 matches with the SA targeting sequencing receiving.Thus, in the situation that the SA targeting sequencing corresponding with each cell ID do not calculated to auto-correlation or cross-correlation, can to the SA targeting sequencing calculating auto-correlation of half or the process of cross-correlation, come detected cells to identify by only carrying out.
Equally, with reference to Figure 12 and Figure 13, only by 256 or 512, add to according to the cell ID of formula 6.And, with the same way with reference to described in Figure 11, shine upon the SA targeting sequencing with adjacent cell ID with complex conjugate relationship.
Figure 14 is the block diagram of transmitter and receiver example according to an embodiment of the invention.In down link, transmitter 1410 is parts of base station, and receiver 1450 is parts of mobile radio station.In up link, transmitter 1410 is parts of mobile radio station, and receiver 1450 is parts of base station.
With reference to Figure 14, in transmitter 1410, processor 1420 is by encoding, interweave the data of for example business datum and signaling and sign map generated data symbol.And pilot processor 1420 generates frequency pilot sign and subsequently data and frequency pilot sign is carried out multiplexing each other.Modulator 1430 generates and sends symbol according to radio access scheme.Radio access scheme comprises in FDMA, TDMA, CDMA, SC-FDMA, MC-FDMA, OFDMA and combination thereof.And one in the various arrangement schemes that modulator 1430 use embodiments of the invention propose can send data by data being distributed in frequency domain.Radio frequency (RF) module 1432 is processed (for example analog-converted, amplification, filtering and up-conversion) by executive signal and is generated the RF signal through antenna 1434 from sending symbol.
Receiver 145 receives via antenna 1452 signal being sent by transmitter 1410, and is forwarded to subsequently RF module 1454.RF module 1454 provides input sample by the signal executive signal receiving is processed to (such as filtering, amplification, down-conversion, digitlization etc.).
Demodulator 1460 provides data value and pilot value by demodulation input sample.The pilot value of channel estimator 1480 based on receiving derives channel estimation value.And demodulator 1460 uses channel estimation value to carry out Data Detection (or balanced) to the data value receiving, and the data symbol estimated value for transmitter 1410 is provided subsequently.In addition, demodulator 1460 can rearrange the data for arranging by original order by the data that distribute in frequency-domain and time-domain by carrying out with the corresponding contrary operation of one of various arrangement schemes that proposed by embodiments of the invention.Processor 1470 pairs of data-signal estimated value DO symbol demappings, deinterleaving and decodings, and the data of decoding are provided subsequently.
Conventionally, modulator 1430 and processor 1420 complementation respectively in the processing of demodulator 1460 and processor 1470 and transmitter 1420 in receiver 1450.
Controller/processor 1440/1490 monitors and controls the operation that is present in the module in emittor/receiver 1410/1450.And, for program code and the data of emittor/receiver 1410/1450, be stored in memory 1442/1492.
The module illustrating in Figure 14 is only provided for this description.Transmitter and/or receiver can also comprise necessary one or more modules.Can clipped module/function, or module/function also can be separated in different modules.And at least two modules can be unified into a module.
By combine structural element of the present invention and feature with predefined type, obtained aforementioned embodiment.Unless specified separately, otherwise should optionally consider each of structural element and feature.Each of those structural elements and feature can in the situation that being combined, other structural elements and feature do not realized.Meanwhile, some structural elements and/or feature can be bonded to each other to form embodiments of the invention.The operating sequence of describing in embodiments of the invention can change.Some structural elements and feature in an embodiment can comprise in another embodiment, or can substitute by corresponding construction element and the feature of another embodiment.In addition, be apparent that, some claim of quoting specific rights requirement can combine to form embodiment with other claim of quoting other claims except these specific rights require, or by modification, adds new claim after application is submitted to.
Data input and data output based between base station and terminal has been described embodiments of the invention.The specific operation that has been described as carrying out by base station also can be carried out by the upper layer node of base station.In other words, be apparent that, for comprise that subscriber equipment in the network of a plurality of network nodes suggestion base station communicates the various operations of carrying out and can carry out by the base station except this base station and network node.Base station can substitute with following term, such as fixed station, Node B, e Node B (eNB) and access point.And terminal can substitute with following term, such as subscriber equipment (UE), mobile radio station (MS) and mobile subscriber station (MSS).
Can realize according to embodiments of the invention by various means for example hardware, firmware, software or its combination.If realized according to embodiments of the invention by hardware, embodiments of the invention can be realized by one or more application-specific integrated circuit (ASIC)s (ASIC), digital signal processor (DSP), digital signal processor (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor etc.
If realized according to embodiments of the invention by firmware or software, the embodiment of the present invention can realize by carrying out module type, process or the function of function as mentioned above or operation.Software code can be stored in memory cell, and by processor, drives subsequently.Inside or outside that memory cell can be positioned at processor send data with the various means by known to processor, and receive data from this processor.
It will be apparent to those skilled in the art that in the situation that not departing from spirit of the present invention and essential feature, can implement the present invention with other specific forms.Therefore, above embodiment will be considered as aspect all illustrative and nonrestrictive.Should determine scope of the present invention by the reasonable dismissal of claims, and all changes in the equivalency range of the present invention falling within the scope of the present invention are included in scope of the present invention.
Industrial applicibility
Therefore, the present invention may be used on wireless communication system, and more specifically, may be used on the mobile radio communication device for cellular system.
Although describe and illustrated the present invention at this with reference to its preferred embodiment, it will be apparent to those skilled in the art that and can carry out therein without departing from the spirit and scope of the present invention various modifications and distortion.Therefore, the present invention is intended to contain modification of the present invention and the distortion in the scope that falls into claims and equivalent thereof.
Claims (4)
1. the method that definite wireless communication system small area identifies, comprises the following steps:
From being received from the auxiliary senior SA targeting sequencing of base station, obtain section ID and sequence index; And
Use described section ID and described sequence index to determine described cell ID,
Wherein said cell ID is corresponding to a SA targeting sequencing,
Wherein, by 256*n+Idx, determine described cell ID,
Wherein, n is section ID and has the value that is set to 0,1 or 2,
Wherein Idx by
determine,
Wherein q is sequence index the integer value with scope from 0 to 255, and,
Wherein the cell ID adjacent with definite cell ID corresponding to the leading SA targeting sequencing with complex conjugate relationship of a described SA.
2. the method for claim 1, wherein has complex conjugate relation corresponding to the SA targeting sequencing of the sequence index x of a section ID and the SA targeting sequencing of sequence index x+128 corresponding to a described section ID.
3. the method for claim 1, wherein divides described sequence index according to cell type.
4. method as claimed in claim 3, wherein said cell type comprises grand senior base station ABS, public ABS and closed subscriber group (CSG) femto ABS.
Applications Claiming Priority (15)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US23615909P | 2009-08-24 | 2009-08-24 | |
| US61/236,159 | 2009-08-24 | ||
| US23653009P | 2009-08-25 | 2009-08-25 | |
| US61/236,530 | 2009-08-25 | ||
| US23727709P | 2009-08-26 | 2009-08-26 | |
| US23727909P | 2009-08-26 | 2009-08-26 | |
| US23728109P | 2009-08-26 | 2009-08-26 | |
| US61/237,279 | 2009-08-26 | ||
| US61/237,277 | 2009-08-26 | ||
| US61/237,281 | 2009-08-26 | ||
| US23821509P | 2009-08-31 | 2009-08-31 | |
| US61/238,215 | 2009-08-31 | ||
| KR10-2010-0026776 | 2010-03-25 | ||
| KR1020100026776A KR20110020715A (en) | 2009-08-24 | 2010-03-25 | Method for determining cell identity in wireless communication system and apparatus therefor |
| PCT/KR2010/002450 WO2011025119A1 (en) | 2009-08-24 | 2010-04-20 | Method for determining cell identity in wireless communication system and apparatus therefor |
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| Publication Number | Publication Date |
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| CN102484530A CN102484530A (en) | 2012-05-30 |
| CN102484530B true CN102484530B (en) | 2014-11-12 |
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| JP (1) | JP5468683B2 (en) |
| KR (1) | KR20110020715A (en) |
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| KR102544653B1 (en) * | 2016-01-21 | 2023-06-20 | 한국전자통신연구원 | Method and apparatus for synchronizing physical layer link channel |
| CN111028073B (en) * | 2019-11-12 | 2023-05-12 | 同济大学 | Internet financial platform network lending fraud detection system |
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| CN1989724A (en) * | 2004-05-21 | 2007-06-27 | 英飞凌科技股份公司 | Device and method for preamble detection and frame synchronization in data packet transmission |
| CN101197805A (en) * | 2007-12-21 | 2008-06-11 | 北京北方烽火科技有限公司 | Lead code detecting method of subscriber station receiver |
| KR100911307B1 (en) * | 2008-03-17 | 2009-08-11 | 엘지전자 주식회사 | Method of transmiting reference signal |
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| WO2007109220A2 (en) * | 2006-03-21 | 2007-09-27 | Interdigital Technology Corporation | Method and apparatus for performing a power efficient cell search in a multi-cell wireless communication system |
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2010
- 2010-03-25 KR KR1020100026776A patent/KR20110020715A/en not_active Application Discontinuation
- 2010-04-20 JP JP2012526616A patent/JP5468683B2/en not_active Expired - Fee Related
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| CN1989724A (en) * | 2004-05-21 | 2007-06-27 | 英飞凌科技股份公司 | Device and method for preamble detection and frame synchronization in data packet transmission |
| CN101197805A (en) * | 2007-12-21 | 2008-06-11 | 北京北方烽火科技有限公司 | Lead code detecting method of subscriber station receiver |
| KR100911307B1 (en) * | 2008-03-17 | 2009-08-11 | 엘지전자 주식회사 | Method of transmiting reference signal |
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| CN102484530A (en) | 2012-05-30 |
| KR20110020715A (en) | 2011-03-03 |
| JP2013502868A (en) | 2013-01-24 |
| JP5468683B2 (en) | 2014-04-09 |
| MY152471A (en) | 2014-10-15 |
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