CN102687420B - Method for allocating preamble sequence subblock for supporting irregular system bandwidth in wireless communication system and an apparatus therefor - Google Patents
Method for allocating preamble sequence subblock for supporting irregular system bandwidth in wireless communication system and an apparatus therefor Download PDFInfo
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- H—ELECTRICITY
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- H04L27/00—Modulated-carrier systems
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- H04L27/2601—Multicarrier modulation systems
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- H04L27/2655—Synchronisation arrangements
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- 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
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- H04L5/003—Arrangements for allocating sub-channels of the transmission path
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Abstract
A method for transmitting a secondary advanced-preamble (SA-preamble) from a base station in a wireless communication system is disclosed, wherein the SA-preamble supporting an irregular system bandwidth. The method comprises allocating a plurality of sequence subblocks corresponding to a regular system bandwidth; symmetrically dropping one or more sequence subblock pairs among the plurality of sequence subblocks based on a DC component to configure the SA-preamble; and transmitting the SA-preamble to a mobile station, wherein a bandwidth at which the SA-preamble is transmitted is the same as or narrower than the irregular system bandwidth.
Description
Technical field
The present invention relates to a kind of wireless communication system, and more specifically, relate to a kind of targeting sequencing sub-block of distributing for supporting method and the device thereof of unconventional system bandwidth in a wireless communication system.
Background technology
Fig. 1 shows the figure of wireless communication system.With reference to figure 1, wireless communication system 100 comprises multiple base station 110 and multiple mobile radio station 120.Wireless communication system 100 can comprise homogenous network or heterogeneous network.In this case, the network that such as the different network entity of macrocell, Femto cell, picocell and relay station coexists is designated as heterogeneous network.Base station is the fixed station carrying out with mobile radio station communicating.Each in base station 110a, 110b and 110c provides service to specific local district 102a, 102b and 102c.In order to improve throughput of system, given zone can be divided into multiple less district 104a, 104b and 104c.Each in less district is designated as community, sector or section.At IEEE(Institute of Electrical and Electric Engineers) 802.16 system, cell ID based on whole system come given.On the other hand, it is given that sector or portion identification provide the given zone of service based on each base station, and have the value of 0 to 2.Usually can distribute in a wireless communication system, fix or mobile mobile radio station 120.Each mobile radio station can both be communicated with one or more base station with down link (DL) by up link (UL) with random time.Base station and mobile radio station can by using FDMA(frequency division multiple access), TDMA(time division multiple access), CDMA(code division multiple access), SC-FDMA(single carrier-FDMA), MC-FDMA(multicarrier-FDMA), OFDMA(OFDM) or their combination communicate each other.In this article, up link means the communication link from mobile radio station to base station, and down link means the communication link from base station to mobile radio station.
Summary of the invention
Technical problem
Therefore, the present invention relates to a kind of for distributing method and the device thereof of targeting sequencing sub-block for supporting unconventional system bandwidth in a wireless communication system, which substantially eliminates one or more problems that restriction and shortcoming due to prior art cause.
The object of the present invention is to provide a kind of for distributing method and the device thereof of targeting sequencing sub-block for supporting unconventional system bandwidth in a wireless communication system.
Additional advantage of the present invention, object and feature will partly be set forth in the following description, and will become apparent for the those of ordinary skill in the art that have studied following content, or can learn from the practice of the present invention.Object of the present invention and other advantages can be realized by the structure pointed out especially in the specification write and claims and accompanying drawing thereof and be obtained.
Technical scheme
In order to realize these objects with other advantages and according to object of the present invention, as in this article to embody and describing substantially, for sending the method for time advanced formula leading (SA-is leading) from base station in a wireless communication system, the unconventional system bandwidth of the leading support of this SA-, the method comprises: distribute the multiple sequence sub-blocks corresponding with conventional system bandwidth; Leading to configuring SA-by the one or more sequence sub-blocks be discarded in symmetrically based on DC component among the plurality of sequence sub-block; And be sent to mobile radio station by leading for SA-, wherein, the leading bandwidth of SA-is identical with unconventional system bandwidth or be narrower than unconventional system bandwidth.
Preferably, unconventional system bandwidth by one or more subbands of being discarded in conventional system bandwidth based on DC component symmetrically and comprising to configuring.If unconventional system bandwidth is 5MHz to 10MHz, then the leading multiple sequence sub-blocks corresponding based on the system bandwidth of the routine with 10MHz of SA-configure, and if unconventional system bandwidth is 10MHz to 20MHz, then the leading multiple sequence sub-blocks corresponding based on the system bandwidth of the routine with 20MHz of SA-configure.
More preferably, SA-is leading based on DC component, comprise identical several aim sequence sub-block at both sides place.The leading bandwidth of SA-is configured by the size of space of 2 sub-blocks (1.25MHz).Meanwhile, unconventional system bandwidth is configured by the size of space of 2 subbands (1.66MHz).
Another aspect of the present invention, base station comprises: processor, multiple sequence sub-blocks that described processor distribution is corresponding with conventional system bandwidth, and by being discarded in one or more sequence sub-blocks among the plurality of sequence sub-block symmetrically based on DC component to configuring time advanced formula leading (SA-is leading); And by leading for the SA-sending module being sent to mobile radio station, the bandwidth that wherein SA-is leading is identical with unconventional system bandwidth or be narrower than unconventional system bandwidth.
Preferably, wherein unconventional system bandwidth by one or more subbands of being discarded in conventional system bandwidth based on DC component symmetrically and comprising to configuring.If unconventional system bandwidth is 5MHz to 10MHz, then the leading multiple sequence sub-blocks corresponding based on the system bandwidth of the routine with 10MHz of SA-configure, and if unconventional system bandwidth is 10MHz to 20MHz, then the leading multiple sequence sub-blocks corresponding based on the system bandwidth of the routine with 20MHz of SA-configure.
More preferably, SA-is leading based on DC component, comprise identical several aim sequence sub-block at both sides place.The leading bandwidth of SA-is configured by the size of space of 2 sub-blocks (1.25MHz).Unconventional system bandwidth is configured by the size of space of 2 subbands (1.66MHz).
Another aspect of the present invention, mobile radio station comprises: receiver module, and described receiver module receives the main advanced formula leading (PA-is leading) of the unconventional system bandwidth of instruction and receives the secondary advanced formula leading (SA-leading) corresponding with this unconventional system bandwidth from base station; And processor, described processor is by using the leading cell identifier determining base station of this SA-, and the bandwidth that wherein SA-is leading is identical with unconventional system bandwidth or be narrower than unconventional system bandwidth.
Preferably, SA-is leading by being discarded in one or more sub-blocks among multiple sequence sub-blocks corresponding with the system bandwidth of routine symmetrically based on DC component to configuring.
In this case, unconventional system bandwidth is by abandoning one or more subband to configuring with the system bandwidth of routine symmetrically based on DC component.If unconventional system bandwidth is 5MHz to 10MHz, then the leading multiple sequence sub-blocks corresponding based on the system bandwidth of the routine with 10MHz of SA-configure, and if unconventional system bandwidth is 10MHz to 20MHz, then the leading multiple sequence sub-blocks corresponding based on the system bandwidth of the routine with 20MHz of SA-configure.
More preferably, SA-is leading based on DC component, comprise identical several aim sequence sub-block at both sides place.The leading bandwidth of SA-is configured by the size of space of 2 sub-blocks (1.25MHz).Unconventional system bandwidth is configured by the size of space of 2 subbands (1.66MHz).
In another aspect of the invention, receive in the method for time advanced formula leading (SA-is leading) in for the mobile radio station at wireless communication system, the unconventional system bandwidth of the leading support of SA-, the method comprises: the main advanced formula leading (PA-is leading) receiving the unconventional system bandwidth of instruction from base station; And receiving the secondary advanced formula leading (SA-leading) corresponding with unconventional system bandwidth, the bandwidth that wherein SA-is leading is identical with unconventional system bandwidth or be narrower than unconventional system bandwidth.Preferably, SA-is leading by being discarded in one or more sub-blocks among multiple sequence sub-blocks corresponding with the system bandwidth of routine symmetrically based on DC component to configuring.
In this case, unconventional system bandwidth is by abandoning one or more subband to configuring with the system bandwidth of routine symmetrically based on DC component.If unconventional system bandwidth is 5MHz to 10MHz, then the leading multiple sequence sub-blocks corresponding based on the system bandwidth of the routine with 10MHz of SA-configure, and if unconventional system bandwidth is 10MHz to 20MHz, then the leading multiple sequence sub-blocks corresponding based on the system bandwidth of the routine with 20MHz of SA-configure.
More preferably, SA-is leading based on DC component, comprise identical several aim sequence sub-block at both sides place.In addition, the bandwidth that SA-is leading is configured by the size of space of 2 sub-blocks (1.25MHz).Unconventional system bandwidth is configured by the size of space of 2 subbands (1.66MHz).
Beneficial effect
According to embodiments of the invention, the targeting sequencing sub-block being used in and supporting unconventional system bandwidth can be divided efficiently in IEEE 802.16m wireless communication system.
Will be appreciated that, the advantage that can be obtained by the present invention is not limited to above-mentioned advantage, and for those skilled in the art, other not referred advantages will be apparent from following description.
Accompanying drawing explanation
Be included to provide a further understanding of the present invention and be incorporated in this specification and the accompanying drawing forming this specification part shows embodiments of the invention, and describing one with this and be used from and explain principle of the present invention.In the drawings:
Fig. 1 shows the figure of wireless communication system;
Fig. 2 shows the figure of the transmitter and receiver for OFDMA and SC-FDMA;
Fig. 3 shows the figure of the example of the structure of the radio frame in IEEE 802.16m system;
Fig. 4 shows the figure of the example of the transmission of the synchronizing channel in IEEE 802.16m system;
Fig. 5 shows the leading figure being mapped to subcarrier wherein of PA-;
Fig. 6 shows the leading figure of the SA-be mapped in frequency domain;
Fig. 7 shows at the figure for the leading structure of the SA-in the frequency domain of 512-FFT;
Fig. 8 to Figure 10 shows the figure of the leading structure of SA-in multiaerial system;
Figure 11 shows the figure of the leading general configuration of SA-in conventional system bandwidth;
Figure 12 shows the figure of the configuration of SA-targeting sequencing sub-block according to an embodiment of the invention;
Figure 13 shows the figure being disposed in the example at multiple antenna place with the SA-targeting sequencing sub-block of the leading unconventional bandwidth transmission of SA-; And
Figure 14 shows the block diagram of transmitter and receiver according to an embodiment of the invention.
Embodiment
Hereinafter, structure of the present invention, operation and other features easily will be understood by the preferred embodiments of the present invention, and the example of preferred embodiment is illustrated in the accompanying drawings.The embodiment described after a while is the example that technical characteristic of the present invention is applicable to the system using multiple orthogonal sub-carriers.For simplicity, will present invention is described based on IEE 802.16 system.But IEEE 802.16 system is only exemplary, and the present invention can be applicable to the various wireless communication systems comprising third generation partner program (3GPP) system.
Fig. 2 shows the block diagram of the transmitter and receiver for OFDMA and SC-FDMA.In the uplink, transmitter can be a part for mobile radio station, and receiver can be a part for base station.In the downlink, transmitter can be a part for base station, and receiver can be a part for mobile radio station.
With reference to figure 2, OFDMA transmitter comprise be serial to parallel converters 202, sub-carrier mapping module 206, M point discrete Fourier inverse transformation (IDFT) module 208, Cyclic Prefix (CP) add module 210 and walk to serial convertor 212 and radio frequency (RF)/digital to analog converter (DAC) module 214.
Hereinafter, be described to the signal processing in OFDMA transmitter.First, bit stream is modulated into data symbol sequence.Bit stream can by performing such as chnnel coding for the data block transmitted from medium access control (MAC) layer, the various signal transacting of intertexture and scrambling obtain.Bit stream can be designated as code word, and is equivalent to the data block from MAC layer transmission.The data block transmitted from MAC layer can be designated as transmission block.The example of modulation scheme includes but not limited to BPSK(binary phase shift keying), QPSK(Quadrature Phase Shift Keying) and n-QAM(quadrature amplitude modulation).The data symbol sequence of series connection is converted into similar N number of parallel data symbol sequence (202).The data symbol of N number of number is used in the subcarrier ading up to the N number of number distributed among M number object subcarrier and maps, and other M-N number object subcarriers use 0 to fill (206).By M point IDFT process, the data symbol mapped in a frequency domain is converted to time domain sequences (S208).Then, in order to reduce intersymbol interference (ISI) and inter-carrier interference (ICI), Cyclic Prefix is added to time domain sequences to generate OFDMA symbol (210).The OFDMA symbol generated is become the symbol (212) of serial from parallel symbol transition.Then, by digital-to-analogue conversion and frequency uplink conversion, OFDMA symbol is sent to receiver (214).Other users are assigned with the available subcarrier among residue M-N number object subcarrier.On the other hand, OFDMA receiver comprises RF/ADC(analog to digital converter) module 216, be serial to parallel converters 218, Cyclic Prefix (CP) removes module 220, M point discrete Fourier conversion (IDT) module 224, subcarrier demapping/equalization module 226 walk to digital quantizer 228 and detection module 230.The signal processing of OFDMA receiver configures with the opposite sequence of OFDMA transmitter.
Meanwhile, compared with OFDMA transmitter, before sub-carrier mapping module 206, SC-FDMA transmitter additionally comprises N point DFT module 204.Before IDFT process, SC-FDMA transmitter can by DFT by multiple Data expansion to frequency domain, reduce the peak-to-average power ratio (PAPR) transmitted more significantly than OFDMA transmitter.In addition, compared with OFDMA receiver, after subcarrier De-mapping module 226, SC-FDMA receiver additionally comprises N point IDFT module 228.The signal processing of SC-FDMA receiver configures with the opposite sequence of SC-FDMA transmitter.
Module shown in Fig. 2 is illustrative, and transmitter and/or receiver can also comprise necessary module.Some module/functions can be omitted, or can be divided into different modules, and two or more modules can be integrated in a module.
Fig. 3 shows the figure of the structure of the radio frame in IEEE 802.16m system.The structure of this radio frame can be applicable to FDD(Frequency Division Duplexing (FDD)), H-FDD(Half-Frequency Division Duplex), TDD(time division duplex) etc.
With reference to figure 3, radio frame comprises the superframe SU0 to SU3 of the 20ms of the bandwidth supporting 5MHz, 8.75MHz, 10MHz or 20MHz.Each superframe comprises four frame F0 to F3 of the 5ms with formed objects, and starts with super-frame header (SFH).Super-frame header carries basic system parameter and system configuration information.
Each frame comprises eight subframe SF0 to SF7.Subframe is allocated for downlink transmission or ul transmissions.Subframe comprises the multiple OFDM symbol in time domain and the multiple subcarriers in frequency domain.According to multiplexing access module, OFDM symbol can be called as OFDMA symbol or SC-FDMA symbol.According to channel width and CP length, the number of the OFDM symbol comprised in subframe can be changed.
OFDM symbol comprises multiple subcarrier, and the number of subcarrier is determined according to the size of fast Fourier transform (FFT).Subcarrier can be divided into the data subcarrier for transfer of data, the pilot sub-carrier for channel measurement and zero subcarrier for the protection of frequency band and DC component.Example for the parameter of OFDM symbol comprises BW, N
used, n, G etc.BW is nominal channel width.N
usedit is the number of the subcarrier for Signal transmissions.N is decimation factor, and determines subcarrier spacing and useful symbol time and BW and N
used.G is the ratio between CP time and useful time.
Table 1 shows the example of OFDMA parameter.
[table 1]
Fig. 4 shows the example of the transmission of the synchronizing channel in IEEE 802.16m system.In this embodiment, only IEEE 802.16m pattern is assumed.
With reference to figure 4, in IEEE 802.16m system, four synchronous channel SCH are sent to a superframe (SU1 ~ SU4).In IEEE 802.16m system, downlink Synchronization Channel comprises primary synchronization channel and sub-synchronizing channel, and wherein, each in primary synchronization channel and sub-synchronizing channel comprises main advanced formula leading (PA-is leading) and time advanced formula leading (SA-is leading).In fdd mode and tdd mode, downlink Synchronization Channel can be sent by the first OFDMA symbol of frame.
Leading being used to of PA-obtains some information, such as system frequency bandwidth information and carrier configuration information.SA-is leading to be used to allow mobile radio station to obtain cell identifier and intensity instruction (RSSI) is measured to the received signal.PA-is leading can be sent by the first frame F0, and SA-is leading can be sent by second to the 4th frame F01 ~ F03.
Fig. 5 shows the leading subcarrier be mapped to wherein of PA-.
There is the length of 216 with reference to figure 5, PA-is leading and is not associated with FFT size.PA-is leading to be inserted by with the interval of two subcarriers, and 0 was inserted in other duration.Such as, PA-leadingly can be inserted into 41,43 ..., 469 subcarrier in.The leading information can carrying such as system bandwidth information and carrier configuration information of PA-.If the sub-carrier indices of 256 is reserved for DC, then the sequence subcarrier be mapped to wherein can use following equation 1 to determine.
[equation 1]
PA preamble carrier=2 × k+41
In this equation 1, k represents the integer between 0 and 215.
Such as, have as in table 2 advise 216 the QPSK type sequence of length to can be used in PA-leading.
[table 2]
Fig. 6 shows the leading example of the SA-be mapped in frequency domain.
With reference to figure 6, according to FFT size, the number distributing to the leading subcarrier of SA-can be changed.Such as, for 512-FFT, 1024-FFT and 2048-FFT, the leading length of SA-can be respectively 144,288 and 576.If 256, the subcarrier of 512 and 1024 is reserved for the DC component for 512-FFT, 1024-FFT and 2048-FFT respectively, then distributing to the leading subcarrier of SA-can determine according to following equation 2.
[equation 2]
In this equation 2, n is SA-preamble carrier index, has the value of 0,1 or 2, and the section of expression ID.N
sAPrepresent the number distributing to the leading subcarrier of SA-, and k represents 0 and N
sAPinteger between-1.
Each community has the community ID(IDCell represented by the integer between 0 and 767).Community ID is defined by segment index and every section of given index.Usually, community ID can be determined by following equation 3.
[equation 3]
IDcell=256×n+Idx
In this equation 3, n is SA-preamble carrier index, has the value of 0,1 or 2, and the section of expression ID.Idx represents the integer between 0 and 255, and is determined by following equation 4.
[equation 4]
In this equation 4, sequence index q is the integer between 0 and 255, and obtains from SA-targeting sequencing.
When 512-FFT, the SA-of 288 bits is leading is divided into eight sequence sub-blocks (that is, A, B, C, D, E, F, G and H), and wherein each has the length of 36 bits.Each section of ID has its corresponding sequence sub-block being different from another section of ID.
Be described in detail to the SA-defined in 802.16m system is leading after a while.When 512-FFT, A, B, C, D, E, F, G and H are modulated with suitable order and are then mapped to the SA-preamble subcarriers corresponding with section ID to be concentrated.If FFT size is increased, then basic block A, B, C, D, E, F, G and H is repeated by with identical order.Such as, when 1024-FFT, E, F, G, H, A, B, C, D, E, F, G, H, A, B, C and D are modulated by with suitable order, are then mapped to the SA-preamble subcarriers corresponding with section ID and concentrate.
Cyclic shift (circular shift) can be applicable to three continuous subcarriers after the subcarrier mapped according to equation 2.Corresponding sub-block has identical skew, and the cyclic shift pattern of each sub-block be [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].In this case, displacement comprises right cyclic shift.
Figure 7 illustrates for the leading structure of the SA-in the frequency domain of 512-FFT.When 512-FFT, block A, B, C, D, E, F, G and H can experience right cyclic shift.
Fig. 8 to Figure 10 shows the figure of the leading structure of SA-in multiaerial system.Particularly, Fig. 8 to Figure 10 respectively illustrates 512-FFT, 1024-FFT and 2048-FFT.
Can be interleaved on multiple antennas with reference to figure 8 to Figure 10, SA-are leading.Especially not to for limiting the leading method interweaved of SA-.Such as, if multiaerial system has 2
nnumber object transmitting antenna, then SA-is leading can be interweaved by the mode shown in table 3.For convenience's sake, { E, F, G, H, A, B, C, D} will be designated as block to eight continuous print sub-blocks, and each symbol will be defined as foloows.
-N
t: the number of transmitting antenna
-N
b: the total number of block
-N
s: the total number (8 × N of sub-block
b)
-N
bt: the number (N of the block of each antenna
b/ N
t)
-N
st: the number (N of the sub-block of each antenna
s/ N
t)
[table 3]
Transmission structure at each frame place can at transmitting antenna Inner eycle.Such as, consider the 512-FFT system with four antennas, at f frame place, [A, 0,0,0, E, 0,0,0] can be sent by first antenna.And [0,0,0, D, 0,0,0, H] can be sent by the 4th antenna.Then, at (f+1) frame place, [0,0,0, D, 0,0,0, H] can be sent by first antenna, and [A, 0,0,0, E, 0,0,0] can be sent by the 4th antenna.
Table 4 to table 6 illustrates 128 SA-targeting sequencings respectively.Parents' sequence [s2] is indicated by index q and is represented by hexadecimal format.Table 4 is to the sequence section of corresponding respectively to 0 ~ 2 of table 6.In table 4 to table 6, blk represents the sub-block forming each sequence.
Modulation sequence passes through hexadecimal sequence X
i (q)(X=A, B, C, D, E, F, G, H) converts two QPSK symbol v to
2i (q)and v
2i+1 (q)obtain.In this case, i represents the integer between 0 and 8, and q represents the integer between 0 and 127.Following equation 5 represents X
i (q)two QPSK symbols are converted into.
[equation 5]
In this case,
By above equation, binary number 00,01,10 and 11 is converted to 1 respectively, j ,-1 and-j.But this is only exemplary, and Xi
(q)can by use another kind of like equation be converted into QPSK symbol.
Such as, if sequence index q is 0, then the sequence of sub-block A is 314C8648F, and this sequence is modulated into the QPSK signal of [+1-j+1+j+j+1-j+1-1+1+j-1+j+1-1+1-j-j].
Meanwhile, the sequence of 128 shown in each in table can expand twice by complex conjugate operation.In other words, can additionally generate 128 sequences by complex conjugate operation, and 128 to 255 indexes can be given generated sequence.That is, the SA-targeting sequencing of the SA-preamble index of corresponding with section ID sequence index x and the sequence index x+128 corresponding with section ID is complex conjugate relationship.Following equation 6 represents the sequence expanded from parents' sequence by complex conjugate operation.
[equation 6]
In this equation 6, k represents 0 and N
sAPinteger between-1, and N
sAPrepresent the length that SA-is leading.Further, the complex signal of a+jb is changed over the complex signal of ab by complex conjugate operation () *, and the complex signal of a-jb is changed over the complex signal of a+jb.
[table 4]
N=0:(section 0)
[table 5]
N=1:(section 1):
[table 6]
N=2:(section 2):
Tone abandons technology by the intention according to service provider, abandon specific bandwidth field based on the system bandwidth of existing routine, makes unconventional system bandwidth.Such as, when IEEE802.16m system, 5MHz, 10MHz and 20MHz as routine system bandwidth and exist, and service provider abandons technology and makes by using tone and be used in the unconventional system bandwidth between 5MHz and 20MHz.Such system bandwidth information can be sent by aforesaid PA-targeting sequencing.The PA-targeting sequencing of index 3 to index 9 occupied for as shown in table 1 go out unconventional system bandwidth.
First, by system bandwidth and SA-leading between relation be described.
The bandwidth of 5MHz, 10MHz and the 20MHz corresponding with the system bandwidth of routine is configured by the one or more subbands (72 subcarriers) in four physical resource unit (PRU).In this case, the subband segmentation of system bandwidth performs based on subband.
Similarly, SA-is leading comprises as shown in Figure 6 as the sub-block (54 subcarrier) of three PRU of elementary cell.In this case, the SA-corresponding with the system bandwidth of the routine of 5MHz is leading comprises eight (8) individual sub-blocks (four, left side sub-block and four, the right sub-block based on DC component), but the SA-corresponding with the system bandwidth of the routine of 10MHz is leading comprises 32 sub-blocks (16, left side sub-block and 16, the right sub-block based on DC component).
Figure 11 shows the figure of the leading general configuration of SA-in conventional system bandwidth.Particularly, (a) of Figure 11 represents the system bandwidth of 5MHz, and (b) represents the system bandwidth of 10MHz.
As shown in fig. 11, if owing to not using tone to abandon technology, SA-is leading by using the bandwidth identical with conventional system bandwidth to send, so requirement should correct the sub-block of distributing when using tone to abandon technology.
But the size of space due to subband is different from the size of space of sub-block, so be difficult to meet both the size of space of subband and the size of space of sub-block when employing when tone abandons technology.In other words, after employing tone and abandoning technology, system bandwidth is configured by subband unit, not affect the existing arrangement based on subband (subband segmentation).In this case, the process of the SA-targeting sequencing detecting sub-block unit can be have impact on.In addition, if tone abandons technology only based on the size of space that SA-is leading, then the arrangement based on subband can be affected.
Hereinafter, the system bandwidth configuration of the present invention abandoning technology and the configuration of SA-leading sub-block according to the tone of system bandwidth configuration is used description to.
Unconventional system bandwidth according to the present invention is based on the size of space of subband unit.Substantially, unconventional system bandwidth between 5MHz and 10MHz is abandoned by tone and configures with the conventional system bandwidth of 10MHz, and the unconventional system bandwidth between 10MHz and 20MHz is abandoned by tone and configures with the system bandwidth of the routine of 20MHz.In this case, all unconventional system bandwidths preferably configure by the size of space of 1 subband (0.83MHz) or 2 subbands (1.66MHZ).Table 7 below shows the number of system bandwidth that the size of space based on 2 subbands advises and the subcarrier corresponding with this system bandwidth.
[table 7]
When the system bandwidth based on routine configures unconventional system bandwidth, the subband be positioned at based on the left hand edge of DC component can be dropped, or the subband being positioned at right hand edge can be dropped.Preferably, each being arranged in the subband of left hand edge and right hand edge can be dropped.
Figure 12 shows the figure of the configuration of the SA-targeting sequencing sub-block according to the embodiment of the present invention.Particularly, Figure 12 shows the system bandwidth of system bandwidth from the routine of 10MHz is discarded into 8.33MHz unconventional system bandwidth by tone.
With reference to Figure 12, system bandwidth to the tone of the system bandwidth of unconventional system bandwidth of 8.33MHz for the routine from 10MHz abandons, and as shown in Reference numeral 1200, the subband being positioned at left hand edge and right hand edge can be dropped respectively.In other words, two subbands (1.66MHz) are abandoned symmetrically based on DC component.
Meanwhile, the leading bandwidth sent with it of SA-can be different from unconventional system bandwidth.That is, SA-targeting sequencing sub-block is abandoned in addition, such that SA-is leading to be sent with the bandwidth identical or narrower with the system bandwidth abandoned in subband unit medium pitch.In other words, the minimum SA-targeting sequencing sub-block being positioned at left hand edge and right hand edge is additionally abandoned, and makes the leading bandwidth sent with it of SA-be no more than the system bandwidth based on DC component as shown in Reference numeral 1250.
If the leading bandwidth of SA-reaches specific size, then its throughput-degrade can seldom occur.Therefore, even if some sub-blocks are additionally abandoned to match with the size of space of sub-block as illustrated in fig. 12 like that, also no problem generation in the throughput detecting SA-targeting sequencing.In this respect, preferably, unconventional bandwidth that SA-is leading is in the present invention configured by the size of space of 2 sub-blocks (1.25MHz).
Table 8 below shows the number N of unconventional bandwidth that the SA-advised in the present invention leading [s3] sends with it, the number of sequence sub-block abandoned, the sequence sub-block of use
siand the SA-leading sub-block corresponding with the number of the sequence sub-block used.
[table 8]
With reference to table 7, the structure that the SA-in multiaerial system is leading is described.
First, if the leading unconventional bandwidth sent with it of SA-is for 5MHz to 6.25MHz, then because sub-block configures with the bandwidth identical with the bandwidth of the leading routine of the SA-of 5MHz, thus employ shown in Fig. 8 with the antenna configuration of 512-FFT.If the leading unconventional bandwidth sent with it of SA-is for 10MHz to 11.25MHz, then because sub-block configures with the bandwidth identical with the bandwidth of the leading routine of the SA-of 10MHz, thus employ shown in Fig. 9 with the antenna configuration of 1024-FFT.
Except in other situations of above-mentioned two situations, SA-targeting sequencing sub-block is arranged in multiple antenna place by by following equation 7.
[equation 7]
Suppose
In this equation 7, N
st, kmean the number of the SA-targeting sequencing sub-block being sent to a kth antenna, and k have 0 and N
tinteger value between-1.Similarly, N
tmean the number of antenna, and N
simean the number of the SA-targeting sequencing sub-block used with the leading unconventional bandwidth of the SA-shown in table 7.
Figure 13 shows the figure that the SA-targeting sequencing sub-block sent with the leading unconventional bandwidth of SA-is disposed in the example at multiple antenna place.Particularly, Figure 13 shows the leading unconventional bandwidth of SA-is 11.25MHz to 12.5MHz.
Figure 14 shows the block diagram of transmitter and receiver according to an embodiment of the invention.In the downlink, transmitter 1410 is parts of base station, and receiver 1450 is parts of mobile radio station.In the uplink, transmitter 1410 is parts of mobile radio station, and receiver 1450 is parts of base station.
In transmitter 1410, processor 1420 by carry out data (such as, business datum and signaling) encoding, interweave and sign map to generate data symbol.Similarly, processor 1420 comes OFDM data symbols and frequency pilot sign by generating frequency pilot sign.
Modulator 1430 generates transmission symbol according to radio access scheme.The example of radio access scheme comprises FDMA, TDMA, CDMA, SC-FDMA, MC-FDMA, OFDMA [s4] or their combination.Similarly, modulator 1430 allows data to send in a frequency domain by using various aligning methods illustrated to be in embodiments of the present invention distributed.Radio frequency (RF) module 1432 is by processing (such as, analog-converted, amplification, filtration and frequency uplink conversion) transmission symbol, generating RF signal via antenna 1434.
In receiver 1450, antenna 1452 receives the signal sent from transmitter 1410, and received signal is supplied to RF module 1454.RF module 1454 is by providing input sample for received signal executive signal process (such as, filtration, amplification, frequency downlink conversion and digitlization).
Demodulator 1460 transfers to provide data value and pilot value by carrying out solution to input sample.Channel estimator 1480 is estimated channel estimation value based on received pilot value.In addition, demodulator 1460 uses channel estimation value, performs detection (or equalization) for received data value, and provides data symbol estim for transmitter 1410.Demodulator 1460 can rearrange with their original orders the data that [s5] distribute in a frequency domain by the inverse operation that performs various aligning methods illustrated in embodiments of the invention.Processor 1470 for data symbol estim DO symbol demapping, deinterleaving and decoding, and provides decoded data.
Usually, in receiver 1450, the modulator 1430 in the process of demodulator 1460 and processor 1470 and transmitter 1410 and the process of processor 1420 complementary.
Controller 1440 and controller 1490 manage respectively and control the operation of the various processing modules existed in transmitter 1410 and receiver 1450.Memory 1442 and 1492 stores the program code and data that are used for transmitter 1410 and receiver 1450 respectively.
Module shown in Figure 14 is illustrative, and transmitter and/or receiver can also comprise necessary module, wherein, some module/functions can be omitted or be divided into different modules, or two or more modules can be unified in a module.
Previous embodiment is realized by the structuring element of the present invention of predefined type and the combination of feature.Unless specified individually, otherwise optionally should consider each in structuring element or feature.In structuring element or feature each can when not with other structuring elements and feature combined realize.Similarly, some structuring elements and/or feature can combination with one another to form embodiments of the invention.The order of the operation described in an embodiment of the present invention can be changed.Some structuring elements of an embodiment or feature can be included in another embodiment, and the corresponding structuring element of another embodiment or feature maybe can be used to substitute.In addition, it is evident that, some claims relating to specific rights requirement with another claim combinations of other claims related to except specific rights requires to form embodiment, or can increase new claim after the application is submitted by revising.
Based on the data transmission and reception between base station and mobile radio station, embodiments of the invention are described.When situation can time, the specific operation being described to just performed by base station can be performed by the upper node of base station.In other words, it is evident that, can be performed by base station or the network node except base station for the various operations performed by communicating with the subscriber equipment in the network comprising multiple network node and base station.Base station can use the term of such as fixed station, Node B, e Node B (eNB) and access point to substitute.Similarly, mobile radio station can use the term of such as subscriber equipment (UE) and mobile subscriber station (MSS) to substitute.
Can be realized by the various devices of such as hardware, firmware, software or their combination according to embodiments of the invention.If realized by hardware according to embodiments of the invention, then embodiments of the invention can be realized by one or more application-specific integrated circuit (ASIC) (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 by firmware or software according to embodiments of the invention, then embodiments of the invention can realize by performing the module of a type of function as described above or operation, process or function.Software code can be stored in a memory cell, then can be driven by processor.Memory cell can be positioned at the inside of processor or outside by known various device data be sent to processor and receive data from processor.
It will be apparent to those skilled in the art that when not deviating from spirit of the present invention and fundamental characteristics, the present invention can come to specialize in other specific forms.Therefore, above-described embodiment all will be regarded as illustrative and nonrestrictive in all respects.Scope of the present invention should be determined by the reasonable dismissal of claims, and the institute fallen in equivalency range of the present invention changes and is all included within the scope of the invention.
Industrial usability
The present invention can be applicable to wireless communication system.More specifically, the present invention can be applicable to the wireless mobile communication device for cellular system.
Claims (16)
1., for sending a method for time advanced formula leading (SA-is leading) in a wireless communication system from base station, described time advanced formula leading (SA-is leading) supports unconventional system bandwidth, and described method comprises:
Distribute the multiple sequence sub-blocks corresponding with conventional system bandwidth;
Based on DC component, by being discarded in one or more sequence sub-blocks among described multiple sequence sub-block symmetrically to configuring described advanced formula leading (SA-is leading); And
Described advanced formula leading (SA-is leading) is sent to mobile radio station,
Wherein, the bandwidth of described advanced formula leading (SA-is leading) is identical with described unconventional system bandwidth or be narrower than described unconventional system bandwidth, and
Wherein, the described bandwidth of described advanced formula leading (SA-is leading) is configured by the size of space of 2 sub-block width, and its interval is of a size of 1.25MHz.
2. method according to claim 1, wherein, one or more subbands that described unconventional system bandwidth is comprised by the system bandwidth being discarded in described routine symmetrically based on DC component are to configuring.
3. method according to claim 1, wherein, if described unconventional system bandwidth is 5MHz to 10MHz, then described advanced formula leading (SA-is leading) configures based on multiple sequence sub-blocks that the system bandwidth of the routine with 10MHz is corresponding, if and described unconventional system bandwidth is 10MHz to 20MHz, then described advanced formula leading (SA-is leading) configures based on multiple sequence sub-blocks that the system bandwidth of the routine with 20MHz is corresponding.
4. method according to claim 1, wherein, described time advanced formula leading (SA-is leading) is based on DC component, comprise identical several aim sequence sub-block at both sides place.
5. a base station, comprising:
Processor, multiple sequence sub-block that described processor distribution is corresponding with conventional system bandwidth and by being discarded in one or more sequence sub-blocks among described multiple sequence sub-block symmetrically based on DC component to configuring time advanced formula leading (SA-is leading); And
Sending module, described advanced formula leading (SA-is leading) is sent to mobile radio station by described sending module,
Wherein, the bandwidth of described advanced formula leading (SA-is leading) is identical with unconventional system bandwidth or be narrower than unconventional system bandwidth, and
Wherein, the described bandwidth of described advanced formula leading (SA-is leading) is configured by the size of space of 2 sub-block width, and its interval is of a size of 1.25MHz.
6. base station according to claim 5, wherein, one or more subbands that described unconventional system bandwidth is comprised by the system bandwidth being discarded in described routine symmetrically based on DC component are to configuring.
7. base station according to claim 5, wherein, if described unconventional system bandwidth is 5MHz to 10MHz, then described advanced formula leading (SA-is leading) configures based on multiple sequence sub-blocks that the system bandwidth of the routine with 10MHz is corresponding, and if described unconventional system bandwidth is 10MHz to 20MHz, then described advanced formula leading (SA-is leading) configures based on multiple sequence sub-blocks that the system bandwidth of the routine with 20MHz is corresponding.
8. base station according to claim 5, wherein, described time advanced formula leading (SA-is leading) is based on DC component, comprise identical several aim sequence sub-block at both sides place.
9. a mobile radio station, comprising:
Receiver module, described receiver module receives the main advanced formula leading (PA-is leading) of the unconventional system bandwidth of instruction from base station, and receives the secondary advanced formula leading (SA-leading) corresponding with described unconventional system bandwidth; And
Processor, described processor determines the cell identifier of described base station by using described secondary advanced formula leading (SA-is leading),
Wherein, the bandwidth of described advanced formula leading (SA-is leading) is identical with described unconventional system bandwidth or be narrower than described unconventional system bandwidth, and
Wherein, described time advanced formula leading (SA-is leading) by being discarded in one or more sub-blocks among multiple sequence sub-blocks corresponding with the system bandwidth of routine symmetrically based on DC component to configuring, and
Wherein, the described bandwidth of described advanced formula leading (SA-is leading) is configured by the size of space of 2 sub-block width, and its interval is of a size of 1.25MHz.
10. mobile radio station according to claim 9, wherein, described unconventional system bandwidth is by being discarded in one or more subbands at the system bandwidth place of described routine symmetrically to configuring based on DC component.
11. mobile radio stations according to claim 9, wherein, if described unconventional system bandwidth is 5MHz to 10MHz, then described advanced formula leading (SA-is leading) configures based on multiple sequence sub-blocks that the system bandwidth of the routine with 10MHz is corresponding, if and described unconventional system bandwidth is 10MHz to 20MHz, then described advanced formula leading (SA-is leading) configures based on multiple sequence sub-blocks that the system bandwidth of the routine with 20MHz is corresponding.
12. mobile radio stations according to claim 9, wherein, described time advanced formula leading (SA-is leading) is based on DC component, comprise identical several aim sequence sub-block at both sides place.
13. 1 kinds of methods for reception time advanced formula leading (SA-is leading) in the mobile radio station of wireless communication system, described time advanced formula leading (SA-is leading) supports unconventional system bandwidth, and described method comprises:
The main advanced formula leading (PA-is leading) of the described unconventional system bandwidth of instruction is received from base station; And
Receive the secondary advanced formula leading (SA-leading) corresponding with described unconventional system bandwidth,
Wherein, the bandwidth of described advanced formula leading (SA-is leading) is identical with described unconventional system bandwidth or be narrower than described unconventional system bandwidth, and
Wherein, described unconventional system bandwidth by being discarded in one or more subbands at the system bandwidth place of described routine symmetrically based on DC component to configuring, and
Wherein, the described bandwidth of described advanced formula leading (SA-is leading) is configured by the size of space of 2 sub-block width, and its interval is of a size of 1.25MHz.
14. methods according to claim 13, wherein, described time advanced formula leading (SA-is leading) is by being discarded in one or more sub-blocks among multiple sequence sub-blocks corresponding with the system bandwidth of routine symmetrically to configuring based on DC component.
15. methods according to claim 13, wherein, if described unconventional system bandwidth is 5MHz to 10MHz, then described advanced formula leading (SA-is leading) configures based on multiple sequence sub-blocks that the system bandwidth of the routine with 10MHz is corresponding, if and described unconventional system bandwidth is 10MHz to 20MHz, then described advanced formula leading (SA-is leading) configures based on multiple sequence sub-blocks that the system bandwidth of the routine with 20MHz is corresponding.
16. methods according to claim 13, wherein, described time advanced formula leading (SA-is leading) is based on DC component, comprise identical several aim sequence sub-block at both sides place.
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| US25087409P | 2009-10-13 | 2009-10-13 | |
| US61/250,874 | 2009-10-13 | ||
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| US25473609P | 2009-10-25 | 2009-10-25 | |
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| US25784609P | 2009-11-04 | 2009-11-04 | |
| US61/257,846 | 2009-11-04 | ||
| KR10-2010-0026267 | 2010-03-24 | ||
| KR1020100026267A KR101741396B1 (en) | 2009-10-12 | 2010-03-24 | Method for allocating preamble sequence subblock for supporting irregular system bandwidth in wireless communication system and apparatus therefor |
| PCT/KR2010/002448 WO2011046277A1 (en) | 2009-10-12 | 2010-04-20 | Method for allocating preamble sequence subblock for supporting irregular system bandwidth in wireless communication system and an apparatus therefor |
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| US10771171B2 (en) * | 2017-09-28 | 2020-09-08 | Hewlett Packard Enterprise Development Lp | High frequency radio signal classifications |
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| US11202297B2 (en) | 2018-09-28 | 2021-12-14 | Hewlett Packard Enterprise Development Lp | Centralized spectrum management for interference mitigation |
| KR102308982B1 (en) * | 2019-08-28 | 2021-10-05 | 중앙대학교 산학협력단 | Scalable sequence creation, detection method and apparatus in UAV cellular network |
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| US20060256709A1 (en) * | 2005-05-10 | 2006-11-16 | Yunsong Yang | Method and apparatus for identifying mobile stations in a wireless communication network |
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