CN101945395B - Method for determining sub-carrier replacement and method for determining cell pilot mode - Google Patents

Method for determining sub-carrier replacement and method for determining cell pilot mode Download PDF

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Publication number
CN101945395B
CN101945395B CN200910152242.1A CN200910152242A CN101945395B CN 101945395 B CN101945395 B CN 101945395B CN 200910152242 A CN200910152242 A CN 200910152242A CN 101945395 B CN101945395 B CN 101945395B
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community
cell
described
cell id
base station
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CN200910152242.1A
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CN101945395A (en
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关艳峰
孙长印
刘向宇
方惠英
刘颖
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中兴通讯股份有限公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
    • H04W72/12Dynamic Wireless traffic scheduling ; Dynamically scheduled allocation on shared channel
    • H04W72/1263Schedule usage, i.e. actual mapping of traffic onto schedule; Multiplexing of flows into one or several streams; Mapping aspects; Scheduled allocation

Abstract

The invention discloses a method for determining sub-carrier replacement and a method for determining a cell pilot mode. The method for determining the sub-carrier replacement comprises the step of determining a sub-carrier replacement sequence or seeds of the sub-carrier replacement sequence in resource mapping according to base station identification and/or cell identification. The method for determining the cell pilot mode comprises the step of determining the cell pilot mode or an index of the cell pilot mode according to the base station identification and/or the cell identification. Through the method, the stagger of pilots in different cells and the randomness of resource mapping are guaranteed, and the interference among the cells is reduced.

Description

Determine the method for subcarrier permutation and determine the method for cell pilot mode

Technical field

The present invention relates to the communications field, determine the method for subcarrier permutation in particular to a kind of and determine the method for cell pilot mode.

Background technology

In a wireless communication system, base station (Base Station, referred to as BS) be point to the equipment that terminal provides service connection, management and control, base station is communicated with terminal with down link by up link, down link refers to that the wireless link of terminal is arrived in base station, and up link refers to the wireless link of terminal to base station.In the wireless communication system based on OFDM (OrthogonalFrequency Division Multiple Access, referred to as OFDMA) technology, complete the mapping of Radio Resource and the distribution of Radio Resource by base station.OFDMA technology is the evolution of OFDM (Orthogonal Frequency DivisionMultiplexing, referred to as OFDM) technology, and user realizes multiple access access by taking different subcarriers.

Usually, BS is equal to community (Cell), littlely divides into sector (Sector).In addition, BS can be divided into several community, and now community is equal to sector.In the communication system based on OFDMA technology, the two-dimentional running time-frequency resource that Radio Resource is made up of time-domain symbol and subcarrier in frequency domain, base station is in order to obtain frequency diversity gain and frequency selective scheduling gain, available physical subcarrier is divided into physical resource unit (Physical Resource Unit, referred to as PRU), and then physical resource unit is mapped as logical resource unit (LogicalResource Unit, referred to as LRU).Logical resource unit comprises: continuous print logical resource unit (Logical Contiguous Resource Unit, referred to as LCRU) and distribution logical resource unit (Logical Distributed Resource Unit, referred to as LDRU), to improve transmission performance, when not causing ambiguity, LCRU can referred to as CRU, and LDRU can referred to as DRU.Subcarrier in continuous resource unit is all continuous print, and the subcarrier in distributed resource unit is completely discontinuous or incomplete continuous print.And require and the factor such as traffic performance according to networking requirement, AF panel, the Resource Unit in community or sector is divided into multiple frequency partition (Frequency Partition, referred to as FP), and each frequency partition comprises multiple Resource Unit.

In order to demands such as network topology, inter base station communication, terminal accesses, base station, community and sector all arrange a mark (Identity is called for short ID).Generally, terminal obtains the mark of base station, community or sector by control channel.In addition, cell ID has important effect in suppression interference.Such as, in order to help decoding terminals, base station, while sending data to terminal, also will send pilot tone to terminal, helps decoding terminals.But usual pilot power is higher, in order to avoid the pilot tone between different communities is disturbed mutually, the pilot tone of different districts is shifted according to cell ID usually, thus takies different running time-frequency resources.Such as, if there are 3 kinds of pilot tone pattern p in system k, k=0,1,2, then the relation of cell ID and pilot tone pattern is as follows:

p k=mod(Cell ID,3)

Be mapped as in the process of logical resource by physical resource, cell ID also has important effect.In wireless communication system, the basic function of the resource mapping of Radio Resource is that physical resource is mapped as logical resource, and for the wireless communication system based on OFDMA technology, its basic function is that physical sub-carrier is mapped as logical resource unit.Usually, the demand of the main demand fulfillment complexity of resource mapping and randomness.Specifically, resource mapping is as far as possible simple, and ensure that base station realizes resource mapping, scheduling of resource, the complexity of data transmit-receive and terminal parses resource allocation information and data transmit-receive is lower; And resource mapping has randomness as far as possible, ensure that the interference ratio of between base station or minizone is lower, even if the logical resource unit that different base station schedulings logical sequence number is identical, but the physical resource of correspondence is different.Usually, resource mapping, all by certain constant series (Permutation Sequence), by the seed of replacement process, constant series or generation constant series and cell ID being bound, will reduce the interference of base station or minizone greatly.

Base station, community and sector mark are obtained by control channel usually.In a wireless communication system, mainly through synchronizing channel (Sychronization Channel, referred to as SCH) and Broadcast Control Channel (Broadcast Control Channel, referred to as BCCH) transmitting system information.Synchronizing channel major function is emending frequency deviation from initial access to terminal, time deviation when providing, carries cell ID (Cell Identity is called for short Cell ID), also carries a small amount of system information simultaneously, such as, and system bandwidth information.Broadcast Control Channel major function is base station to the system configuration of terminal broadcast necessity and control information.

Need to illustrate: BCCH can referred to as broadcast channel (Broadcast Channel, referred to as BCH) under the condition setting forth control channel.In addition, owing to sending in first subframe of Broadcast Control Channel usually in the head of superframe or superframe, Broadcast Control Channel is also referred to as superframe header (Superframe Header, referred to as SFH), main Broadcast Control Channel is also referred to as main superframe header (Primary Superframe Header, referred to as P-SFH), auxiliary Broadcast Control Channel is also referred to as auxiliary superframe header (Secondary Superframe Header, referred to as S-SFH).

In Institute of Electrical and Electric Engineers (Institute for Electrical and ElectronicEngineers, referred to as IEEE) 802.16m system, cell identity definition and use also exist incorrect and unclear place.Such as,

Cell ID=256·n+Idx (2)

Wherein, n=0,1,2 is the index of set of secondary synchronization sequences, and Idx is positive integer, gets sequence sum the set of secondary synchronization sequences index subtract one from 0.

But formula (2) definition cannot ensure that the pilot tone of all neighbor cells staggers.

In addition, in IEEE 802.16m system, resource mapping generally comprises multiple cell public resource and maps (Multi-cell Resource Mapping) part and cell-specific resource mapping (Cell-Specific Resource Mapping) part, multiple cell public resource maps and one of to comprise the steps or combination: sub-band division (Subband Partitioning), micro-band displacement (Miniband Permutation), frequency partition divides (Frequency Partitioning), cell-specific resource maps and one of to comprise the steps or combination: continuous resource unit/distributed resource unit distributes (Contiguous Resource Unit/Distributed Resource UnitAllocation, referred to as CRU/DRU Allocation) and subcarrier permutation (SubcarrierPermutation) or Tile displacement (Tile Permutation), wherein, subcarrier permutation is used in down link, Tile displacement is used in up link.Subband is made up of N1 continuous print PRU, and such as N1=4, Miniband are made up of N2 continuous print PRU, such as N2=1.And in cell-specific resource maps, the relation of the constant series used in each frequency partition, the seed of constant series or replacement process and Base Station Identification and/or cell ID is also unclear.

Summary of the invention

For correlation technique small area mark definition and use also exist incorrect and unclear and cell-specific resource mapping in, the relation of the constant series used in each frequency partition, the seed of constant series or replacement process and Base Station Identification and/or cell ID also unclear problem and propose the present invention, for this reason, main purpose of the present invention is that providing a kind of determines the scheme of subcarrier permutation and determine the scheme of cell pilot mode, to solve the problem one of at least.

According to an aspect of the present invention, a kind of method determining subcarrier permutation is provided.

Determine that the method for subcarrier permutation comprises according to of the present invention: according to the seed of Base Station Identification and/or cell ID determination resource mapping sub-carriers constant series or subcarrier permutation sequence.

According to another aspect of the present invention, a kind of method determining cell pilot mode is provided.

Determine that the method for cell pilot mode comprises according to of the present invention: according to the index of Base Station Identification and/or cell ID determination cell pilot mode or cell pilot mode.

Pass through the present invention, provide and Base Station Identification and cell ID are set, and between different districts in the wireless communication system of OFDMA, in pilot frequency deviation and resource mapping, in different frequency subregion, use the processing scheme of cell ID, solve correlation technique small area mark definition and use also exist incorrect and unclear, and in cell-specific resource maps, the constant series used in each frequency partition, the relation also unclear problem of the seed of constant series or replacement process and Base Station Identification and/or cell ID, and then ensured that different districts pilot tone staggers and the randomness of resource mapping, reduce the interference of minizone.

Accompanying drawing explanation

Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:

Fig. 1 is the schematic diagram of the frame structure of wireless communication system according to the embodiment of the present invention;

Fig. 2 is the schematic diagram of the resource mapping process of wireless communication system according to the embodiment of the present invention;

Fig. 3 is the schematic diagram of the basic process of resource mapping in the 5MHz wireless communication system according to the embodiment of the present invention;

Fig. 4 is the schematic diagram of the architecture of base station according to the embodiment of the present invention;

Fig. 5 is the schematic diagram of the basic process of resource mapping in the 10MHz wireless communication system according to the embodiment of the present invention.

Embodiment

Functional overview

Consider that the mark definition of correlation technique small area and use also exist incorrect and unclear, and in cell-specific resource maps, the constant series used in each frequency partition, the relation also unclear problem of the seed of constant series or replacement process and Base Station Identification and/or cell ID, embodiments provide and a kind ofly determine the scheme of subcarrier permutation and determine the scheme of cell pilot mode, above scheme solves how to use the problem of cell ID based on different frequency subregion in pilot frequency deviation between the different districts in the wireless communication system of OFDMA and resource mapping, thus guarantee different districts pilot tone staggers and the randomness of resource mapping, reduce the interference of minizone, meet the flexibility of wireless resource scheduling, frequency selectivity gain and frequency diversity gain are provided, the spectrum efficiency of ultimate guarantee wireless communication system.

It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.

In the examples below, can perform in the computer system of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing, and, although show logical order in flow charts, but in some cases, can be different from the step shown or described by order execution herein.

Embodiment of the method

Embodiment one

According to embodiments of the invention, provide a kind of method determining subcarrier permutation, the method comprises: according to the seed of Base Station Identification and/or cell ID determination resource mapping sub-carriers constant series or subcarrier permutation sequence; Also can be understood as: according to the seed of Tile constant series or Tile constant series in Base Station Identification and/or cell ID determination resource mapping, that is: by the seed of the subcarrier permutation sequence in embodiment or subcarrier permutation sequence, and change descending scene into up scene simultaneously, be also a kind of embodiment.

Wherein, the seed of subcarrier permutation sequence or subcarrier permutation sequence is used for realizing subcarrier permutation, subcarrier in the distributed resource of the down link in frequency partition carries out interweaving or replacing by subcarrier permutation, and the seed of subcarrier permutation sequence is used for determining or generating subcarrier permutation sequence.

Need to illustrate: the seed of subcarrier permutation sequence or subcarrier permutation sequence is applicable to downlink resource mapping process, and the seed of constant series or Tile constant series is applicable to ascending resource mapping process.

Before this, arrange the Base Station Identification (that is, there is a logical identifier each base station) of base station, base station comprises N number of community, arranges the cell ID of N number of community, and wherein, Base Station Identification is positive integer BS iD, BS iDspan be 0 to K-1, cell ID is positive integer Cell iD, Cell iDspan be 0 to 3K-1, Cell iDtransmitted by secondary synchronization sequences, and Cell iDwith BS iDrelation determined by following formula: BS iD=mod (Cell iD, M), wherein, the value of M is 3 or K, wherein, K be greater than 0 positive integer.

Wherein, Cell iDthe relation of the secondary synchronization sequences corresponding with it or secondary synchronization sequences place carrier set is determined one of by the following method:

Cell ID=Kn+Idx;

Cell ID=Kn+BS ID

Cell ID=3·BS ID+n;

Cell ID=3·Idx+n;

Wherein, the index of n secondary synchronization sequences place carrier set, value is: 0,1,2.Idx is secondary synchronization sequences index, and span is 0 to K-1, wherein, K be greater than 0 positive integer.

When a base station comprises a community, corresponding 1 an of Idx passes through Cell iDthe community of mark, a community correspondence 1 passes through BS iDthe base station of mark, now, BS iD=Cell iD=Idx.

When a base station comprises three communities, 3 Cell that an Idx generates iDbS is passed through in 3 communities identified iDmark, this BS iD=Idx.

Particularly, following four kinds of situations are comprised according to the seed of Base Station Identification and/or cell ID determination resource mapping sub-carriers constant series or subcarrier permutation sequence.Below the various situations of the method are described in detail.

Situation one

Base station is divided into 3 communities, each community comprises 4 frequency partition (0,1,2,3), in each community, the seed of the 0th frequency partition sub-carriers constant series or subcarrier permutation sequence is determined according to Base Station Identification, and the frequency partition sub-carriers constant series in each community except frequency partition 0 or the seed of subcarrier permutation sequence are determined according to respective cell ID.Comprise the following two kinds method:

3 cell IDs are Cell iD0, Cell iD1and Cell iD2, represent community 0,1 and 2 respectively, then:

Frequency partition 1,2,3 sub-carriers constant series in community 0 or the seed of subcarrier permutation sequence are according to Cell iD0determine;

Frequency partition 1,2,3 sub-carriers constant series in community 1 or the seed of subcarrier permutation sequence are according to Cell iD1determine; With

Frequency partition 1,2,3 sub-carriers constant series in community 2 or the seed of subcarrier permutation sequence are according to Cell iD2determine;

Or:

Frequency partition 1 sub-carriers constant series in community 0,1 and 2 or the seed of subcarrier permutation sequence are according to Cell iD0determine;

Frequency partition 2 sub-carriers constant series in community 0,1 and 2 or the seed of subcarrier permutation sequence are according to Cell iD1determine; With

Frequency partition 3 sub-carriers constant series in community 0,1 and 2 or the seed of subcarrier permutation sequence are according to Cell iD2determine.

Situation two

Base station is divided into 3 communities, and each community comprises 3 frequency partition, and the seed of each community Zhong Ge frequency partition sub-carriers constant series or subcarrier permutation sequence is determined according to respective cell ID.

3 cell IDs are Cell iD0, Cell iD1and Cell iD2, represent community 0,1 and 2 respectively, then:

Frequency partition 1,2,3 sub-carriers constant series in community 0 or the seed of subcarrier permutation sequence are according to Cell iD0determine;

Frequency partition 1,2,3 sub-carriers constant series in community 1 or the seed of subcarrier permutation sequence are according to Cell iD1determine; With

Frequency partition 1,2,3 sub-carriers constant series in community 2 or the seed of subcarrier permutation sequence are according to Cell iD2determine;

Or:

Frequency partition 1 sub-carriers constant series in community 0,1 and 2 or the seed of subcarrier permutation sequence are according to Cell iD0determine;

Frequency partition 2 sub-carriers constant series in community 0,1 and 2 or the seed of subcarrier permutation sequence are according to Cell iD1determine; With

Frequency partition 3 sub-carriers constant series in community 0,1 and 2 or the seed of subcarrier permutation sequence are according to Cell iD2determine.

Situation three

Base station is divided into 3 communities, that is, base station comprises community 0, community 1 and community 2, and the cell ID of community 0 is Cell iD0, the cell ID of community 1 is Cell iD1, the cell ID of community 2 is Cell iD2, and each community comprises 1 frequency partition, the seed of each community medium frequency subregion sub-carriers constant series or subcarrier permutation sequence is determined according to respective cell ID or Base Station Identification.

Situation four

Comprise 1 community 0 in base station, the cell ID of community 0 is Cell iD0, and when community 0 comprises L frequency partition, determine the seed of each frequency partition sub-carriers constant series or subcarrier permutation sequence in community 0 according to cell ID or Base Station Identification, wherein, L be greater than 0 positive integer.

Be described in detail below in conjunction with the implementation procedure of example to the embodiment of the present invention.

Frame structure and the resource structures of this wireless communication system based on the Main Basis of resource mapping in the wireless communication system of OFDMA technology.Radio Resource is divided into the unit of different brackets thus provides dispatcher meeting flexibly by frame structure in time domain, such as, superframe, frame, subframe and symbol are dispatched, meet service quality (the Quality ofService of wireless communication system, referred to as QoS), especially meet the requirement of system transfers time delay.

Fig. 1 is the schematic diagram of the frame structure of wireless communication system according to the embodiment of the present invention, as shown in Figure 1, Radio Resource is divided into superframe in time domain, each superframe comprises 4 frames, each frame comprises 8 subframes, subframe is made up of 6 basic OFDM symbol, the OFDM symbol number specifically comprised in each grade unit in the factor determination frame structures such as the system bandwidth that communication system is supported according to actual needs, the length of Cyclic Prefix and up-downgoing conversion interval.The factors such as coverage, coverage rate, power system capacity and transmission rate that Radio Resource is supported as required by resource structures on frequency domain are divided into multiple frequency partition, and then the frequency resource in frequency partition is mapped as continuous resource unit and/or distributed resource unit.

Fig. 2 is the schematic diagram of the resource mapping process of wireless communication system according to the embodiment of the present invention, as shown in Figure 2, the available physical subcarrier of a subframe is divided into 3 frequency partition, and each frequency partition is divided into centralized resources and distributed resource for realizing the flexibility of dispatching.Available frequency band is divided into multiple frequency partition by the factors such as the coverage that resource structures is supported as required on frequency domain, the speed of terminal, speed and type of service, and then the frequency resource in frequency partition is divided into centralized resources region and/or distributed resource region dispatches.

Fig. 3 is the schematic diagram of the basic process of resource mapping in the 5MHz wireless communication system according to the embodiment of the present invention, as shown in Figure 3, under 5MHz OFDMA system resource mapping process in, fast Fourier transformation algorithm (the Fast Fourier TransformAlgorithm method of 5MHz system, referred to as FFT) to count be 512, in each subframe, available subcarrier is 432, is divided into into 24 physical resource unit, and each size is 18 × 6.First, 24 physical resource unit are divided into multiple subband (Subband), each Subband comprises a continuous print N1 physical resource unit, and such as, N1=4 is then 6 Subband, replaces or extract K from Subband equal intervals to Subband sBindividual Subband, such as, K sB=3, adopt ranks displacement, permutation matrix is [0,1; 2,3; 4,5], then the order before replacing is [0,1,2,3,4,5] order after displacement is [0,2,4,1,3,5], then 3 Subband are retained, namely, 0,2,4, remaining physical resource unit is divided into multiple Miniband (micro-band), each Subband comprises a continuous print N2 physical resource unit, such as, and N2=1, be then 12 Minibband, carry out replacement operator to Miniband, Subband and Miniband obtained is mapped to 3 frequency partition, these operations belong to multiple cell resource mapping; Subsequent operation belongs to cell-specific resource and maps, for each frequency partition, all physical resource unit in frequency partition are taken out part or all and is directly mapped as continuous resource unit, remaining physical resource unit is mapped as distributed resource unit by subcarrier permutation, as shown in Figure 3, front 4 physical resource unit (0 in frequency partition 0,1,2,3) be mapped directly as continuous resource unit, remain 4 physical resource unit (4,7,14,21) distributed resource unit is mapped as by subcarrier permutation behaviour.

Fig. 4 is the schematic diagram of the architecture of base station according to the embodiment of the present invention, and as shown in Figure 4, base station is divided into 3 communities, and each community comprises 3 frequency partition, and each community Zhong Ge frequency partition sub-carriers replacement process or sequence are determined according to respective cell ID; Wherein, Base Station Identification is BS iD, 3 cell IDs are respectively Cell iD0, Cell iD1and Cell iD2, represent community 0,1 and 2 respectively, then:

Frequency partition 1,2,3 sub-carriers constant series in community 0 or the seed of subcarrier permutation sequence and/or the seed of Tile constant series or Tile constant series are according to Cell iD0determine;

Frequency partition 1,2,3 sub-carriers constant series in community 1 or the seed of subcarrier permutation sequence and/or the seed of Tile constant series or Tile constant series are according to Cell iD1determine;

Frequency partition 1,2,3 sub-carriers constant series in community 2 or the seed of subcarrier permutation sequence and/or the seed of Tile constant series or Tile constant series are according to Cell iD2determine.

Such as: for frequency partition 0 (or 1,2), suppose there are 8 LRU, wherein have 4 DRU, each LRU has 18 subcarriers on frequency domain, time domain has 6 time-domain symbol, makes L sC, lrepresent the number of the data subcarrier in l OFDMA symbol in a PRU, this number subcarrier in frequency domain number that should equal on PRU deducts the pilot frequency carrier wave number n on each symbol l(n in this example l=2), in this example, L sC, l=18-2=16, makes L sP, lthe number that data subcarrier in l the OFDMA symbol of expression in a PRU is right, this number should equal a constant series PermSeq (), will be used for performing subcarrier permutation.

For l OFDMA symbol in subframe, first in each DRU, distribute n l(n in this example l=2) individual pilot tone, by the DRU in l OFDMA symbol fP, i[j] data subcarrier is designated as 0≤j < L dRU, FPi, 0≤k < L sC, l, L here dRU, FPithe number of the DRU in the FPi of frequency partition, L in this example dRU, FP0=4.

To L dRU, FPil sC, lindividual data carrier renumbers, and 0,1,2 ..., L dRU, FPil sC, l-1, the carrier wave after renumbeing these, is divided into L dRU, FPil sP, lindividual carrier wave pair, 0,1,2 ..., L dRU, FPil sP, l-1, the carrier wave after renumbering in l OFDMA symbol is to being designated as RSP FP i , l [ u ] = { SC DRU j , l FP i [ 2 v ] , SC DRU j , l FP i [ 2 v + 1 ] } , 0≤u < L dRU, FPil sP, l, here v={u}modL sP, l.

Application subcarrier permutation formula SC LRU s , l FP i [ m ] = RSP F P i , l [ k ] , 0≤m < L sP, l, will be mapped in s distributed LRU, in this formula, k = L DRU , FP i &CenterDot; f ( m , s ) + g ( PermSeq ( ) , s , m , l , t ) , be i-th frequency partition in t subframe s distributed LRU on the 1st symbol on m subcarrier pair, 0≤m here≤L dP, l-1,0≤l≤N sym-1, 0 &le; s &le; L DRU , F P i - 1 , PermSeq () is length constant series, this PermSeq () is by Seed={Cell iD0* 1367}mod 2 10determine, due to 1367 and 2 10coprime, so different Cell iDas long as (meeting 0≤CellID≤1023) must correspond to different Seed, g (PermSeq (), s, m, l, t) is that a value is in [0, L dRU, FPi-1] function, g (PermSeq (), s, m, l, t)={ PermSeq [{ f (m, s)+s+l}modL dRU, FPi]+DL_PermBase}mod L dRU, FPi, DL-PermBase is an integer here, f (m, s)={ m+13s}modL sP, l.And depend on Cell iDthe generating algorithm of Permseq as follows:

Length is the Permseq generating algorithm of M.

(1) initialization procedure

First the Seed initializing variable d1 of 10 bits is used, d2, d 1 = floor ( Seed 2 5 ) + 1 , d 2=Seed mod 2 5

Initialization maximum iteration time counter N=4

Initialization length is the array A of M, is designated as A [0]=0, A [1]=1 ..., A [M-1]=M-1

Initialization counter i is M-1

Initialization x=-1

(2) if i > 0, so process is repeated below

A) initialization counter j is 0

B) repetitive cycling is as follows:

c)x=x+1,j=j+1

d)y=(d1*x+d2)mod 1031mod M

If e) y is not less than i, and j < N, repeat above-mentioned 2) middle step

A) and b)

If f) y is not less than i, make y=y mod i

G) i-th and a jth element in array A is exchanged

h)i=i-1

(3)PermSeq(i)=A(i),0<=i<M

In this example, only need make M=4, putting seed Seed is Seed={Cell iD0* 1367}mod 2 10, corresponding constant series can be generated, such as:

Make Cell iD0=0, then constant series are { 2310}; Make Cell iD1=1, then constant series are { 301 2}; Make Cell iD2=2, then constant series are { 1,3,0,2}.

Again such as, if in some frequency partition (community 1 might as well be set to) L DRU , FP i = 12 , And Cell iD1=511, then constant series are that { 2,4,1,0,5,6,7,8,11,10,3,9}, in community 0 L DRU , FP i = 12 , And Cell iD0=510, constant series are that { 1,2,5,4,7,8,10,11,3,0,9,6}, in community 2 L DRU , FP i = 12 , And Cell iD2=512, constant series are { 9,7,8,10,11,2,4,6,1,3,5,0}.

Or:

Frequency partition 1 sub-carriers constant series in community 0,1 and 2 or the seed of subcarrier permutation sequence and/or the seed of Tile constant series or Tile constant series are according to Cell iD0determine;

Frequency partition 2 sub-carriers constant series in community 0,1 and 2 or the seed of subcarrier permutation sequence and/or the seed of Tile constant series or Tile constant series are according to Cell iD1determine;

Frequency partition 3 sub-carriers constant series in community 0,1 and 2 or the seed of subcarrier permutation sequence and/or the seed of Tile constant series or Tile constant series are according to Cell iD2determine;

Subcarrier wherein map and PermSeq generation method the same, be only changeable parameters.

Fig. 5 is the schematic diagram of the basic process of resource mapping in the 10MHz wireless communication system according to the embodiment of the present invention, as shown in Figure 5, the basic process of resource mapping in 10MHz (also comprising 7MHz, 8.75MHz) wireless communication system in the present invention is described.Wherein, Subband number is 5, and has 4 frequency partition, and each frequency partition size is 12 PRU, and first frequency partition comprises 8 CRU and 4 DRU, and other frequency partition all comprises 4 CRU and 8 DRU.

Base station is divided into 3 communities, each community comprises 4 frequency partition (0,1,2,3), in each community, the sequence of the 0th frequency partition sub-carriers displacement or Tile displacement is determined according to Base Station Identification, and the frequency partition sub-carriers replacement process in each community except frequency partition 0 or sequence are determined according to respective cell ID.Comprise the following two kinds method:

3 cell IDs are Cell iD0, Cell iD1and Cell iD2, represent community 0,1 and 2 respectively, then:

Frequency partition 1,2,3 sub-carriers constant series in community 0 or the seed of subcarrier permutation sequence and/or the seed of Tile constant series or Tile constant series are according to Cell iD0determine;

Frequency partition 1,2,3 sub-carriers constant series in community 1 or the seed of subcarrier permutation sequence and/or the seed of Tile constant series or Tile constant series are according to Cell iD1determine;

Frequency partition 1,2,3 sub-carriers constant series in community 2 or the seed of subcarrier permutation sequence and/or the seed of Tile constant series or Tile constant series are according to Cell iD2determine;

Subcarrier wherein map and PermSeq generation method the same, be only changeable parameters.

Or:

Frequency partition 1 sub-carriers constant series in community 0,1 and 2 or the seed of subcarrier permutation sequence and/or the seed of Tile constant series or Tile constant series are according to Cell iD0determine;

Frequency partition 2 sub-carriers constant series in community 0,1 and 2 or the seed of subcarrier permutation sequence and/or the seed of Tile constant series or Tile constant series are according to Cell iD1determine;

Frequency partition 3 sub-carriers constant series in community 0,1 and 2 or the seed of subcarrier permutation sequence and/or the seed of Tile constant series or Tile constant series are according to Cell iD2determine;

Subcarrier wherein map and PermSeq generation method the same, be only changeable parameters.

Embodiment two

According to embodiments of the invention, provide a kind of method determining cell pilot mode.The method comprises: according to the index of Base Station Identification and/or cell ID determination cell pilot mode or cell pilot mode.Wherein, cell pilot mode is used to indicate the pilot frequency sequence that described community uses, and the index of cell pilot mode is used for identifying cells pilot frequency mode.

Before this, described method also comprises following operation: the described Base Station Identification arranging base station, and described base station comprises N number of community, arranges the described cell ID of described N number of community, and wherein, described Base Station Identification is positive integer BS iD, BS iDspan be 0 to K-1, described cell ID is positive integer Cell iD, Cell iDspan be 0 to 3K-1, and Cell iDwith BS iDrelation by formula BS iD=mod (Cell iD, M) determine.Wherein, BS iD=mod (Cell iD, M) in the value of M be 3 or K, wherein, K be greater than 0 positive integer.

Wherein, Cell iDdetermine one of in the following way with the relation of corresponding secondary synchronization sequences or secondary synchronization sequences place carrier set:

Cell ID=K·n+Idx;

Cell ID=K·n+BS ID

Cell ID=3·BS ID+n;

Cell ID=3·Idx+n;

Wherein, n is the index of secondary synchronization sequences place carrier set, and the value of n is: 0,1,2, Idx is secondary synchronization sequences index, and the span of Idx is 0 to K-1, wherein, K be greater than 0 positive integer.

Wherein, the pilot sequences pattern index p of described community and the cell ID Cell of described community iDrelation by formula p=mod (Cell iD, M) determine.

Be described in detail below in conjunction with the implementation procedure of instantiation to " index according to Base Station Identification and/or cell ID determination cell pilot mode or cell pilot mode ".

In this embodiment, K value is 256, arranges the Base Station Identification BS of base station iDbe 0, base station comprises 3 communities, and cell ID is respectively Cell iD0=0, Cell iD1=1, Cell iD2=2, Cell iDwith BS iDrelation by formula BS iD=mod (Cell iD, 3) determine, i.e. M=3.

Cell iDcell is passed through with the relation of corresponding secondary synchronization sequences or secondary synchronization sequences place carrier set iD=3BS iD+ n determines, wherein, the value of n is: 0,1,2.

The pilot sequences pattern index p of community and the cell ID Cell of community iDrelation by formula p=mod (Cell iD, 3) determine, that is: the pilot sequences pattern index p=p=mod (Cell of community 0 iD0, 3), the pilot sequences pattern index p=p=mod (Cell of community 1 iD1, 3), the pilot sequences pattern index p=p=mod (Cell of community 2 iD2, 3).

Or;

K value 256, arranges the Base Station Identification BS of base station iDbe 1, base station comprises 3 communities, and cell ID is respectively Cell iD0=1, Cell iD1=257, Cell iD2=513, Cell iDwith BS iDrelation by formula BS iD=mod (Cell iD, 256) determine, that is, M=K=256.

Cell iDcell is passed through with the relation of corresponding secondary synchronization sequences or secondary synchronization sequences place carrier set iD=Kn+BS iDdetermine, the value of n is: 0,1,2.

The pilot sequences pattern index p of community and the cell ID Cell of community iDrelation by formula p=mod (Cell iD, 256) determine, that is: the pilot sequences pattern index p=p=mod (Cell of community 0 iD0, 256), the pilot sequences pattern index p=p=mod (Cell of community 1 iD1, 3), the pilot sequences pattern index p=p=mod (Cell of community 2 iD2, 3), now, M=K=256.

In sum, pass through the above embodiment of the present invention, propose and a kind ofly determine the scheme of subcarrier permutation and determine the scheme of cell pilot mode, to solve how to use the problem of cell ID based on different frequency subregion in pilot frequency deviation between the different districts in the wireless communication system of OFDMA and resource mapping, thus guarantee different districts pilot tone staggers and the randomness of resource mapping, reduce the interference of minizone, meet the flexibility of wireless resource scheduling, there is provided frequency selectivity gain and frequency diversity gain, the spectrum efficiency of ultimate guarantee wireless communication system.

Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.

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

Claims (17)

1. determine a method for subcarrier permutation, it is characterized in that, comprising:
Arrange the Base Station Identification of base station, described base station comprises N number of community, arranges the cell ID of described N number of community, and wherein, N is positive integer, and described Base Station Identification is positive integer BS iD, BS iDspan be 0 to K-1, described cell ID is positive integer Cell iD, Cell iDspan be 0 to 3K-1, wherein, K is positive integer, and Cell iDwith BS iDrelation by formula BS iD=mod (Cell iD, M) to determine, the value of M is 3 or K;
According to the seed of described Base Station Identification and/or described cell ID determination resource mapping sub-carriers constant series or subcarrier permutation sequence.
2. method according to claim 1, it is characterized in that, the seed of subcarrier permutation sequence or subcarrier permutation sequence is used for realizing subcarrier permutation, and the subcarrier in the distributed resource of the down link in frequency partition carries out interweaving or replacing by subcarrier permutation.
3. method according to claim 1 and 2, is characterized in that, the seed of subcarrier permutation sequence is used for determining or generating subcarrier permutation sequence.
4. method according to claim 1 and 2, is characterized in that, wherein, and Cell iDdetermine one of in the following way with the relation of corresponding secondary synchronization sequences or secondary synchronization sequences place carrier set:
Cell ID=K·n+Idx;
Cell ID=K·n+BS ID
Cell ID=3·BS ID+n;
Cell ID=3·Idx+n;
Wherein, n is the index of secondary synchronization sequences place carrier set, and the value of n is: 0,1,2, Idx is secondary synchronization sequences index, and the span of Idx is 0 to K-1, wherein, K be greater than 0 positive integer.
5. method according to claim 1 and 2, is characterized in that, when a base station comprises a community, and BS iD=Cell iD=Idx.
6. method according to claim 1 and 2, is characterized in that, when a base station comprises three communities, and BS iD=Idx.
7. method according to claim 1, is characterized in that, the seed according to described Base Station Identification and/or the displacement of described cell ID determination resource mapping sub-carriers or subcarrier permutation sequence comprises:
Comprise community 0, community 1 and community 2 in described base station, the cell ID of described community 0 is Cell iD0, the cell ID of described community 1 is Cell iD1, the cell ID of described community 2 is Cell iD2, when described community 0, described community 1 and described community 2 comprise 4 frequency partition (0,1,2,3) respectively,
The seed of the 0th frequency partition sub-carriers constant series or subcarrier permutation sequence in each community in base station is determined according to described Base Station Identification, the seed of frequency partition sub-carriers constant series in each community except frequency partition 0 or subcarrier permutation sequence is determined according to described cell ID, wherein
According to Cell iD0determine the seed of frequency partition 1,2,3 sub-carriers constant series in community 0 or subcarrier permutation sequence;
According to Cell iD1determine the seed of frequency partition 1,2,3 sub-carriers constant series in community 1 or subcarrier permutation sequence; With
According to Cell iD2determine the seed of frequency partition 1,2,3 sub-carriers constant series in community 2 or subcarrier permutation sequence.
8. method according to claim 1, is characterized in that, the seed according to described Base Station Identification and/or described cell ID determination resource mapping sub-carriers constant series or subcarrier permutation sequence comprises:
Comprise community 0, community 1 and community 2 in described base station, the cell ID of described community 0 is Cell iD0, the cell ID of described community 1 is Cell iD1, the cell ID of described community 2 is Cell iD2, when described community 0, described community 1 and described community 2 comprise 4 frequency partition (0,1,2,3) respectively,
The seed of the 0th frequency partition sub-carriers constant series or subcarrier permutation sequence in each community in base station is determined according to described Base Station Identification, the seed of frequency partition sub-carriers constant series in each community except frequency partition 0 or subcarrier permutation sequence is determined according to described cell ID, wherein
According to Cell iD0determine the seed of frequency partition 1 sub-carriers constant series in community 0,1 and 2 or subcarrier permutation sequence;
According to Cell iD1determine the seed of frequency partition 2 sub-carriers constant series in community 0,1 and 2 or subcarrier permutation sequence; With
According to Cell iD2determine the seed of frequency partition 3 sub-carriers constant series in community 0,1 and 2 or subcarrier permutation sequence.
9. method according to claim 1, is characterized in that, the seed according to described Base Station Identification and/or described cell ID true resource mapping sub-carriers constant series or subcarrier permutation sequence comprises:
Comprise community 0, community 1 and community 2 in described base station, the cell ID of described community 0 is Cell iD0, the cell ID of described community 1 is Cell iD1, the cell ID of described community 2 is Cell iD2, when described community 0, described community 1 and described community 2 comprise 3 frequency partition (1,2,3) respectively,
According to Cell iD0determine the seed of frequency partition 1,2,3 sub-carriers constant series in community 0 or subcarrier permutation sequence;
According to Cell iD1determine the seed of frequency partition 1,2,3 sub-carriers constant series in community 1 or subcarrier permutation sequence; With
According to Cell iD2determine the seed of frequency partition 1,2,3 sub-carriers constant series in community 2 or subcarrier permutation sequence.
10. method according to claim 1, is characterized in that, the seed according to described Base Station Identification and/or described cell ID determination resource mapping sub-carriers constant series or subcarrier permutation sequence comprises:
Comprise community 0, community 1 and community 2 in described base station, the cell ID of described community 0 is Cell iD0, the cell ID of described community 1 is Cell iD1, the cell ID of described community 2 is Cell iD2, when described community 0, described community 1 and described community 2 comprise 3 frequency partition (1,2,3) respectively,
According to Cell iD0determine the seed of frequency partition 1 sub-carriers constant series in community 0,1 and 2 or subcarrier permutation sequence;
According to Cell iD1determine the seed of frequency partition 2 sub-carriers constant series in community 0,1 and 2 or subcarrier permutation sequence; With
According to Cell iD2determine the seed of frequency partition 3 sub-carriers constant series in community 0,1 and 2 or subcarrier permutation sequence.
11. methods according to claim 1, is characterized in that, the seed according to described Base Station Identification and/or described cell ID determination resource mapping sub-carriers constant series or subcarrier permutation sequence comprises:
Comprise community 0, community 1 and community 2 in base station, the cell ID of described community 0 is Cell iD0, the cell ID of described community 1 is Cell iD1, the cell ID of described community 2 is Cell iD2, and when each community comprises 1 frequency partition, determine the seed of each community medium frequency subregion sub-carriers constant series or subcarrier permutation sequence according to described cell ID or described Base Station Identification.
12. methods according to claim 1, is characterized in that, the seed according to described Base Station Identification and/or described cell ID determination resource mapping sub-carriers constant series or subcarrier permutation sequence comprises:
Comprise 1 community 0 in base station, the cell ID of described community 0 is Cell iD0, and when described community 0 comprises L frequency partition, determine the seed of each frequency partition sub-carriers constant series or subcarrier permutation sequence in described community 0 according to described cell ID or described Base Station Identification, wherein, L be greater than 0 positive integer.
13. 1 kinds of methods determining cell pilot mode, is characterized in that, comprising:
Arrange the Base Station Identification of base station, described base station comprises N number of community, arranges the cell ID of described N number of community, and wherein, N is positive integer, and described Base Station Identification is positive integer BS iD, BS iDspan be 0 to K-1, described cell ID is positive integer Cell iD, Cell iDspan be 0 to 3K-1, wherein, K is positive integer, and Cell iDwith BS iDrelation by formula BS iD=mod (Cell iD, M) to determine, the value of M is 3 or K;
According to the index of described Base Station Identification and/or described cell ID determination cell pilot mode or cell pilot mode.
14. methods according to claim 13, is characterized in that, cell pilot mode is used to indicate the pilot frequency sequence that described community uses.
15. methods according to claim 13 or 14, is characterized in that, the index of cell pilot mode is used for identifying cells pilot frequency mode.
16. methods according to claim 13 or 14, is characterized in that, wherein, and Cell iDdetermine one of in the following way with the relation of corresponding secondary synchronization sequences or secondary synchronization sequences place carrier set:
Cell ID=K·n+Idx;
Cell ID=K·n+BS ID
Cell ID=3·BS ID+n;
Cell ID=3·Idx+n;
Wherein, n is the index of secondary synchronization sequences place carrier set, and the value of n is: 0,1,2, Idx is secondary synchronization sequences index, and the span of Idx is 0 to K-1, wherein, K be greater than 0 positive integer.
17. methods according to any one of claim 13 or 14, is characterized in that, wherein, and the pilot sequences pattern index p of described community and the cell ID Cell of described community iDrelation by formula p=mod (Cell iD, M) determine.
CN200910152242.1A 2009-07-07 2009-07-07 Method for determining sub-carrier replacement and method for determining cell pilot mode CN101945395B (en)

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