CN101064706A - Time-frequency resource distributing method and its apparatus and wireless communication system - Google Patents
Time-frequency resource distributing method and its apparatus and wireless communication system Download PDFInfo
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- CN101064706A CN101064706A CNA2006100775960A CN200610077596A CN101064706A CN 101064706 A CN101064706 A CN 101064706A CN A2006100775960 A CNA2006100775960 A CN A2006100775960A CN 200610077596 A CN200610077596 A CN 200610077596A CN 101064706 A CN101064706 A CN 101064706A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2615—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using hybrid frequency-time division multiple access [FDMA-TDMA]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
Abstract
The invention relates to a kind of time-frequency resource distribution method and device, the method includes: A. the whole time-frequency flat surface is divided into R physical resources which are equal with each other; each includes M sub carriers which is continuous in frequency domain and N symbols which are continuous in time domain; B. setting a group of orthogonal time-frequency pattern to fill the whole time-frequency flat surface; C. the physical resource block is distributed to dummy resource block or/and disperse dummy resource block, thereinto the time-frequency pattern or section of time-frequency pattern are distributed to a disperse dummy resource block, the disperse transmission physical resource block refers to physical resource block distributed to disperse dummy resource block. The device includes: physical resource dividing unit, time-frequency pattern setting unit and time-frequency resource distributing unit. Aiming at resolving current scheme can not use time-frequency resource occupy mode transmitted dispersedly to realize randomization of interference between area, and without sufficient frequency diversity plus.
Description
Technical field
The present invention relates to communication technical field, particularly relate to distribution method and the device and the wireless communication system of running time-frequency resource.
Background technology
Cellular radio Communication system is realized frequency reuse by a big service area is divided into many less overlay areas, to improve power system capacity.Each little area of coverage is called as a sub-district (cell).When to adopt the simple multiplexing factor be one frequency resource allocation, different districts adopted identical frequency, thereby work in can the phase mutual interference between the signal of sub-district of same frequency.The designing requirement of cellular system will guarantee that the interference between the user is as far as possible little in the sub-district, and the while presence of intercell interference is equalization as far as possible.
OFDM (OFDM, orthogonal frequency division multiplexing) technology is divided into the narrowband subchannels of some quadratures with broad-band channel in frequency domain, high-speed data-flow is by serial to parallel conversion parallel transmission on each subchannel.Because the narrow-band characteristic of subchannel can overcome multi-path influence, eliminates intersymbol interference greatly,, thereby improved the availability of frequency spectrum again simultaneously owing to still satisfy orthogonal property under the overlapped situation of the frequency spectrum between subchannel.Simultaneously, because the development of Digital Signal Processing and the introducing of fast discrete Fourier conversion, the signal modulation and demodulation of ofdm system also become very simple, and these all make the OFDM technology become the core technology of mobile communication system gradually.
In 3GPP technical report 25.814, following mentality of designing proposed for downlink data is multiplexing:
Whole frequency band is divided into a series of Physical Resource Block (PRB), and each Physical Resource Block comprises on M the frequency domain continuous symbol on continuous sub-carriers and N the time domain, and M tentatively is defined as 25.Under the situation of not considering information such as pilot tone and control, N value 7 is a symbolic number in the subframe.The big or small S of a Physical Resource Block
PRBRepresent that with M * N M * N is the total number of time frequency unit that Physical Resource Block takies, a time frequency unit refers to a subcarrier in the symbol time.
Ofdm system is supported two kinds of transmission meanss: concentration of transmissions (Localized Distribution) and dispersion transmission (Distributed Transmission).Concentration of transmissions takies continuous sub-carriers, disperses transmission then to take the subcarrier of some dispersions to reach the purpose of frequency diversity.For convenience, introduce the notion of virtual resource blocks (VRB, Virtual Resource Block).A virtual resource blocks is by two parameter characterizations, and first is resource block size (Size); Second is type (Type), promptly virtual resource blocks is divided into concentrated virtual resource blocks (LVRB, Localized Virtual Resource Block) and disperses virtual resource blocks (DVRB, Distributed Virtual Resource Block) two kinds.
Described concentrated virtual resource blocks (LVRB) is mapped on the Physical Resource Block in a concentrated manner, disperses virtual resource blocks (DVRB) then to be mapped on the Physical Resource Block in the mode of disperseing.When having two kinds of transmission in the subframe simultaneously, two kinds of transmission are together multiplexing in the mode of frequency division.
The scheme that virtual resource blocks is mapped to Physical Resource Block is the important content of the cellular radio Communication system design of OFDM technology, and at present, a kind of scheme that realizes is:
Concentrated virtual resource blocks (LVRB) and Physical Resource Block (PRB) equal and opposite in direction are set, a concentrated virtual resource blocks is mapped directly on the Physical Resource Block.
Use N
PRBThe number of expression PRB is used N
LVRBThe number of expression LVRB is because LVRB is corresponding one by one to the mapping of PRB, so N
LVRBValue equate with the PRB number that is used for concentration of transmissions.Remaining PRB can be used for disperseing transmission, represents that with DPRB number is N
DPRB=N
PRB-N
LVRB
Be provided with and disperse virtual resource blocks (DVRB) and LVRB and PRB equal and opposite in direction, number N
DVRBExpression, then N
DVRB≤ N
DPRB, the resource of promptly finally distributing to dispersion transmission user is less than or equals system can give the resource quantity of disperseing transmission.
Each DVRB is divided into N
DPRBPart, each part is mapped on one section resource of a DPRB, and this section resource is all continuous at frequency domain and time domain.Concrete cutting apart with mapping method is as follows:
Give N
DVRBIndividual DVRB is provided with sequence number i=0, and 1,2 ..., N
DVRB-1,
Give N simultaneously
DPRBIndividual DPRB is provided with sequence number j=0, and 1,2 ..., N
DPRB-1.
A DVRB is divided into N
DPRBPart, wherein j part is mapped on j the DPRB.J part size of i DVRB is given by the following formula so:
When j=i,
When j ≠ i,
, S wherein
DVRBThe size of a DVRB of expression.
The less DVRB of sequence number preferentially shines upon.
Calculate the original position of j part on j DPRB of i DVRB, the 0th size to the j part of i-1 DVRB need add up.
Illustrate in the prior art scheme DVRB below to the mapping of DPRB:
There are 12 PRB in the system of a 5M bandwidth in a subframe, wherein 8 are used for concentration of transmissions so N
DPRB=4.Being provided with 3 DVRB will be mapped in the physical channel.
Do not consider information such as pilot tone and control, S
DVRB=S
PRB=M * N=25 * 7=175.So
When j=i,
When j ≠ i,
Wherein, i=0,1,2; J=0,1,2,3
So the DVRB of i=0 takies whole 7 symbols of the the the the 0th, the 1, the 2nd, the 3rd, the 4th, the 5th subcarrier of the DPRB of j=0, and preceding 4 symbols of the 6th subcarrier; Take j=1, j=2, whole 7 symbols of the the the the 0th, the 1, the 2nd, the 3rd, the 4th, the 5th subcarrier of the DPRB of j=3, and the 1st symbol of the 6th subcarrier;
The DVRB of i=1 takies back 3 symbols of the 6th subcarrier of the DPRB of j=0, whole 7 symbols of the the the 7th, the 8th, the 9th, the 10th, the 11st subcarrier, and preceding 5 symbols of the 12nd subcarrier; Take back 6 symbols of the 6th subcarrier of the DPRB of j=1, whole 7 symbols of the the the 7th, the 8th, the 9th, the 10th, the 11st subcarrier, and preceding 5 symbols of the 12nd subcarrier; Take j=2, back 6 symbols of the 6th subcarrier of the DPRB of j=3, whole 7 symbols of the the the 7th, the 8th, the 9th, the 10th, the 11st subcarrier, and preceding 2 symbols of the 12nd subcarrier;
The DVRB of i=2 takies j=0, back 2 symbols of the 12nd subcarrier of the DPRB of j=1, whole 7 symbols of the the the 13rd, the 14th, the 15th, the 16th, the 17th subcarrier, and preceding 6 symbols of the 18th subcarrier; Take back 5 symbols of the 12nd subcarrier of the DPRB of j=2, whole 7 symbols of the the the 13rd, the 14th, the 15th, the 16th, the 17th subcarrier, and preceding 6 symbols of the 18th subcarrier; Take back 5 symbols of the 12nd subcarrier of the DPRB of j=3, whole 7 symbols of the the the 13rd, the 14th, the 15th, the 16th, the 17th subcarrier, and preceding 3 symbols of the 18th subcarrier.
As shown in Figure 1, corresponding 3 DVRB of 3 figure on the left side, middle corresponding 4 DPRB of 4 figure, wherein, left oblique line is represented the resource that the DVRB of i=0 takies, and right oblique line is represented the resource that the DVRB of i=1 takies, and grid line is represented the resource that the DVRB of i=2 takies; Corresponding 12 PRB of the figure on the right, wherein the part of grey is represented the PRB that taken by concentration of transmissions.
By above-mentioned disclosed technical scheme as can be known, the running time-frequency resource of dispersion transmission takies method and does not play the randomized effect of reinforcement presence of intercell interference; And the frequency resource that the part that is mapped to a DPRB owing to a DVRB takies is continuous, a PRB occupied bandwidth is bigger in system, during such as 25 subcarriers, the continuous frequency resource of this section can not be represented the channel situation of 25 subcarrier experience well, so frequency diversity gain is limited; This Technology Need time and frequency two coordinates are jointly determined among the DPRB to have increased complexity of calculation from the position of the data of different DVRB.
Summary of the invention
The technical problem that the present invention solves provides a kind of distribution method and device and wireless communication system of running time-frequency resource, disperses the running time-frequency resource occupancy mode of transmission to realize the randomization of presence of intercell interference and the problem that can not obtain sufficient frequency diversity gain to solve can not utilize in the present technical scheme.
For addressing the above problem, the invention provides a kind of distribution method of running time-frequency resource, described method comprises step:
A, whole time-frequency plane is divided into R equal-sized Physical Resource Block, each Physical Resource Block comprises on M the frequency domain continuous symbol on continuous sub-carriers and N the time domain, R wherein, and M and N are positive integer;
B, for each sub-district is provided with the frequency patterns of one group of quadrature, and fill up whole time-frequency plane with it;
C, Physical Resource Block distributed to concentrate virtual resource blocks or/and disperse virtual resource blocks, the segment that wherein will be distributed in the frequency patterns of disperseing in the transmitting physical Resource Block or frequency patterns is distributed to one and is disperseed virtual resource blocks, and described dispersion transmitting physical Resource Block is meant distributes to the Physical Resource Block that disperses virtual resource blocks.
Preferably, the frequency patterns of one group of equal and opposite in direction and quadrature is set for each sub-district described in the step B, and determines the size of each frequency patterns and the number of time-frequency pattern, wherein said each frequency patterns size is: k * R * N; The number of described frequency patterns is: M/k, k are any one approximate numbers of M.
Preferably, the individual equal-sized period of the day from 11 p.m. to 1 a.m of R frequency patterns of pattern formation frequently is set, the running time-frequency resource that the individual sub-frequency patterns of described R takies lays respectively in R the different Physical Resource Block, and each period of the day from 11 p.m. to 1 a.m frequency pattern takies k subcarrier on each symbol.
Preferably, the frequency patterns group that is provided with for different districts among the step B is identical or inequality.
Preferably, described in the step C Physical Resource Block is distributed to concentrated virtual resource blocks or/and disperse virtual resource blocks specifically to comprise:
Physical Resource Block is all distributed to concentrated virtual resource blocks or all distributed to the dispersion virtual resource blocks, perhaps
A part of Physical Resource Block is distributed to concentrated virtual resource blocks, all the other Physical Resource Block are distributed to the dispersion virtual resource blocks.
Preferably, the frequency of the period of the day from 11 p.m. to 1 a.m in frequency patterns pattern is distributed to the dispersion virtual resource blocks, the running time-frequency resource that wherein said period of the day from 11 p.m. to 1 a.m frequency pattern takies is arranged in distributes to the Physical Resource Block that disperses transmission.
Preferably, described in the step C frequency patterns being distributed to disperses the detailed process of virtual resource blocks to be: respectively to frequency patterns with disperse the virtual resource block sequencing, and the part that is not taken by concentration of transmissions in the described frequency patterns sequentially distributed to the dispersion virtual resource blocks, and when last frequency patterns segment of a virtual resource blocks is distributed in a segment conduct of a frequency patterns, distribute next segment of this frequency patterns first frequency patterns segment as next virtual resource blocks.
Preferably, described frequency patterns is distributed to disperses the detailed process of virtual resource blocks to be: respectively to disperseing the pattern ordering frequently of the virtual resource blocks and the period of the day from 11 p.m. to 1 a.m, wherein said period of the day from 11 p.m. to 1 a.m frequency pattern is arranged in distributes to the Physical Resource Block that disperses transmission; And the described period of the day from 11 p.m. to 1 a.m distributed to pattern order the dispersion virtual resource blocks frequently.
Preferably, described method also comprises: one or more virtual resource blocks are distributed to a kind of channel or user's use.
In addition, the present invention also provides a kind of distributor of running time-frequency resource, and the resource that is used for determining each virtual resource blocks is in the position of Physical Resource Block, and to distribute running time-frequency resource, described virtual resource blocks comprises to be concentrated virtual resource blocks and disperse virtual resource blocks; Described device comprises:
Physical resource dividing unit is used for whole time-frequency plane is divided into R equal-sized Physical Resource Block, and each Physical Resource Block comprises on M the frequency domain continuous symbol on continuous sub-carriers and N the time domain, R wherein, and M and N are positive integer;
Time-frequency pattern setting unit links to each other with physical resource dividing unit, is used to each sub-district that the frequency patterns of one group of quadrature is set, and fills up whole time-frequency plane with it;
Time-frequency resource distributing unit, link to each other respectively with time-frequency pattern setting unit with physical resource dividing unit, be used for Physical Resource Block is distributed to concentrated virtual resource blocks or/and disperse virtual resource blocks, the segment that wherein will be distributed in the frequency patterns of disperseing in the transmitting physical Resource Block or frequency patterns is distributed to one and is disperseed virtual resource blocks, and described dispersion transmitting physical Resource Block is meant distributes to the Physical Resource Block that disperses virtual resource blocks.
Preferably, described time-frequency pattern setting unit is used to each sub-district that the frequency patterns of one group of equal and opposite in direction and quadrature is set, and determines the size of each frequency patterns and the number of time-frequency pattern, and wherein said each frequency patterns size is: k * R * N; The number of described frequency patterns is: M/k, k are any one approximate numbers of M.
Preferably, described time-frequency pattern setting unit, be used to be provided with R equal-sized period of the day from 11 p.m. to 1 a.m frequency patterns of pattern formation frequently, the running time-frequency resource that the individual sub-frequency patterns of described R takies lays respectively in R the different Physical Resource Block, and each period of the day from 11 p.m. to 1 a.m frequency pattern takies k subcarrier on each symbol.
Preferably, described time-frequency resource distributing unit is used for the period of the day from 11 p.m. to 1 a.m frequency pattern of frequency patterns is distributed to the dispersion virtual resource blocks, and the running time-frequency resource that wherein said period of the day from 11 p.m. to 1 a.m frequency pattern takies is arranged in distributes to the Physical Resource Block that disperses transmission.
Preferably, described time-frequency resource distributing unit, be used for frequency patterns is distributed to the dispersion virtual resource blocks, specifically be used for respectively to frequency patterns and dispersion virtual resource block sequencing, and the part that is not taken by concentration of transmissions in the described frequency patterns sequentially distributed to the dispersion virtual resource blocks, and when last frequency patterns segment of a virtual resource blocks is distributed in a segment conduct of a frequency patterns, distribute next segment of this frequency patterns first frequency patterns segment as next virtual resource blocks.
Preferably, described time-frequency resource distributing unit, be used for frequency patterns is distributed to the dispersion virtual resource blocks, specifically be used for respectively dispersion virtual resource blocks and period of the day from 11 p.m. to 1 a.m frequency pattern being sorted, wherein said period of the day from 11 p.m. to 1 a.m frequency pattern is arranged in distributes to the Physical Resource Block that dispersion is transmitted; And the described period of the day from 11 p.m. to 1 a.m distributed to pattern order the dispersion virtual resource blocks frequently.
In addition, the present invention provides a kind of wireless communication system again, described system comprise the base station and with the travelling carriage of base station communication, wherein said base station comprises the time-frequency resource allocating device, the resource that is used for determining each virtual resource blocks wherein disperses the position of virtual resource blocks in Physical Resource Block to distribute according to frequency patterns in the position of Physical Resource Block; And described base station is used for notifying travelling carriage with the resource of each virtual resource blocks in the running time-frequency resource information of physical resource piece position;
Described travelling carriage according to the running time-frequency resource information of resource position in the physical resource piece of each received virtual resource blocks, is adjusted the time-frequency position that is used to the information that receives.
Preferably, described time-frequency resource allocating device comprises:
Physical resource dividing unit is used for time-frequency plane is divided into R equal-sized Physical Resource Block, and each Physical Resource Block comprises on M the frequency domain continuous symbol on continuous sub-carriers and N the time domain, R wherein, and M and N are positive integer;
Time-frequency pattern setting unit links to each other with physical resource dividing unit, for each sub-district the frequency patterns of one group of quadrature is set according to running time-frequency resource, and fills up whole time-frequency plane with it;
Time-frequency resource distributing unit, link to each other respectively with time-frequency pattern setting unit with physical resource dividing unit, Physical Resource Block is distributed to concentrated virtual resource blocks or/and disperse virtual resource blocks, the segment that wherein will be distributed in the frequency patterns of disperseing in the transmitting physical Resource Block or frequency patterns is distributed to one and is disperseed virtual resource blocks, and described dispersion transmitting physical Resource Block is meant distributes to the Physical Resource Block that disperses virtual resource blocks.
Compared with prior art, the present invention has following beneficial effect: the present invention is by the mapping relations of design virtual resource block to physical resource block, the running time-frequency resource of realizing frequency division orthogonal multiplex (OFDM) cellular radio Communication system is multiplexing, no matter make only has the transmission of dispersion in the system, still disperse transmission and concentration of transmissions frequency division multiplexing, can both satisfy the average as far as possible requirement of presence of intercell interference, disperse transmission can obtain sufficient frequency diversity gain simultaneously.
Description of drawings
Fig. 1 will disperse virtual resource blocks to be mapped to an embodiment of Physical Resource Block in the prior art;
Fig. 2 is the flow chart of the distribution method of running time-frequency resource of the present invention;
Fig. 3 is an embodiment of the described frequency patterns of Fig. 2 distribution situation in Physical Resource Block;
Fig. 4 is an embodiment who disperses virtual resource blocks to be mapped to Physical Resource Block by frequency patterns;
Fig. 5 is the structural representation of the distributor of running time-frequency resource of the present invention;
Fig. 6 is the structural representation of wireless communication system of the present invention.
Embodiment
Core of the present invention is that whole time-frequency plane is divided into R equal-sized Physical Resource Block, and each Physical Resource Block comprises on M the frequency domain continuous symbol on continuous sub-carriers and N the time domain, R wherein, and M and N are positive integer; Frequency patterns with one group of specific quadrature of sub-district is filled up whole time-frequency plane; Physical Resource Block is distributed to concentrated virtual resource blocks and/or disperseed virtual resource blocks; The segment that wherein will be distributed in the frequency patterns of disperseing in the transmitting physical Resource Block or frequency patterns is distributed to one and is disperseed virtual resource blocks, and described dispersion transmitting physical Resource Block is meant distributes to the Physical Resource Block that disperses virtual resource blocks.No matter the present invention only has the frequency division multiplexing that disperses transmission or two kinds of transmission in order to be implemented in the wireless communication system, can both satisfy the average as far as possible requirement of presence of intercell interference, disperses transmission can obtain sufficient frequency diversity gain simultaneously.
For the ease of those skilled in the art's understanding, the present invention is described further below in conjunction with accompanying drawing.
See also Fig. 2, be the flow chart of distribution method of time frequency resources of the present invention.Described method comprises:
Step S11: whole time-frequency plane is divided into R equal-sized Physical Resource Block, and each Physical Resource Block comprises on M the frequency domain continuous symbol on continuous sub-carriers and N the time domain, R wherein, and M and N are positive integer;
Step S12:, and fill up whole time-frequency plane with it for each sub-district is provided with the frequency patterns of one group of quadrature;
Step S13: Physical Resource Block is distributed to concentrated virtual resource blocks or/and disperse virtual resource blocks, the segment that wherein will be distributed in the frequency patterns of disperseing in the transmitting physical Resource Block or frequency patterns is distributed to one and is disperseed virtual resource blocks, and described dispersion transmitting physical Resource Block is meant distributes to the Physical Resource Block that disperses virtual resource blocks.
Before explanation the present invention, in order to simplify description, the present invention does not consider information such as pilot tone and control in the following description, only considers the design when whole time-frequency plane is used for transfer of data.In case need to be provided with information such as pilot tone and control in the system, relevant position then is used for information such as pilot tone such as first or preceding two symbols of a subframe, and the design of all the other positions remains unchanged.
In step S11, whole time-frequency plane is divided into R equal-sized Physical Resource Block from frequency domain, each Physical Resource Block comprises continuous sub-carriers on M the frequency domain.Whole time-frequency plane comprises continuous symbol on N the time domain.Represent the size of a Physical Resource Block, i.e. the running time-frequency resource quantity that Physical Resource Block comprises with M * N.And sequence number j=0 is set for R Physical Resource Block, and 1,2 ..., R-1.
In step S12,, and fill up whole time-frequency plane with it for the sub-district is provided with the frequency patterns of one group of quadrature.Wherein, frequency patterns refers to the set of one group of running time-frequency resource; Two just interdigital two frequency patterns of frequency patterns do not comprise public running time-frequency resource.
The size that each frequency patterns is set is k * R * N (frequency patterns size i.e. the number of the time frequency unit that takies of frequency patterns), the frequency patterns of total M/k the quadrature of then whole time-frequency plane, wherein k is any one approximate number of M, and to the time-frequency pattern setting sequence number, i=0,1,2, ..., M/k-1.
A frequency patterns is divided into equal-sized R sub-frequency patterns, and sequence number j=0 is set, 1,2 ..., R-1, j
0Individual sub-frequency patterns only comprises j
0Running time-frequency resource on the individual Physical Resource Block, j
0=0,1,2 ..., R-1.Each period of the day from 11 p.m. to 1 a.m pattern magnitude frequently is k * N, comprises the N group resource on the corresponding physical Resource Block.This N group resource lays respectively on N the different symbol, and takies k subcarrier on each symbol, and this k subcarrier can continuously also can be discontinuous, for example can be spacedly distributed.Next can carry out the frequency patterns design according to the description of the described scheme of a plurality of patents, determine each period of the day from 11 p.m. to 1 a.m sub-carrier positions of the N group resource occupation of pattern frequently, such as application number be: 200610005696.2,200610006600.4 or/and 200610002999.9 patents, concrete implementation procedure sees described patent for details, does not repeat them here.Usually, give sequence that particular length is N of each period of the day from 11 p.m. to 1 a.m pattern distribution frequently of each frequency patterns, corresponding N the symbol of the sequence number of this sequence, the sub-carrier positions in the corresponding Physical Resource Block of the value of this sequence.As shown in Figure 3, be the embodiment of frequency patterns distribution situation in Physical Resource Block.Wherein get parameter M=25, N=7, R=12, k=5.The figure on the left side represents a frequency patterns and 12 sub-frequency patterns thereof among Fig. 2, and wherein different decorative patterns is represented the period of the day from 11 p.m. to 1 a.m different in this frequency patterns pattern frequently; The figure on the right represents 12 Physical Resource Block, and wherein different decorative patterns is corresponding to the period of the day from 11 p.m. to 1 a.m of corresponding decorative pattern pattern frequently, and blank parts is by other frequency patterns, i.e. i=1, and i=2, i=3, the frequency patterns of i=4 is filled up.Different districts can adopt identical frequency patterns group also can adopt different frequency patterns groups.During the different frequency patterns group that in adopting above-mentioned patent, designs, can obtain the interference randomization of minizone easily.
In step S13, Physical Resource Block is distributed to concentrated virtual resource blocks or/and disperse virtual resource blocks, the segment that wherein will be distributed in the frequency patterns of disperseing in the transmitting physical Resource Block or frequency patterns is distributed to one and is disperseed virtual resource blocks, and described dispersion transmitting physical Resource Block refers to distributes to the Physical Resource Block that disperses virtual resource blocks.A kind of feasible way is the part that is not taken by concentration of transmissions in the frequency patterns sequentially to be distributed to disperse the transfer of virtual Resource Block.And when last frequency patterns segment of a virtual resource blocks is distributed in a segment conduct of a frequency patterns, distribute next segment of this frequency patterns first frequency patterns segment as next virtual resource blocks.
Specific practice can be the period of the day from 11 p.m. to 1 a.m frequency pattern that disperses the virtual resource blocks order assignment not taken by concentration of transmissions to each, can distribute to the period of the day from 11 p.m. to 1 a.m pattern unification frequently numbering of disperseing virtual resource blocks promptly for all, give the little period of the day from 11 p.m. to 1 a.m of the little dispersion virtual resource blocks priority allocation sequence number of sequence number pattern frequently.
If sometime, concentrating the number of virtual resource blocks in the system is Q, and disperseing the number of virtual resource blocks is P.Given virtual resource block size for example is M * N, then P+Q≤R.Give and disperse the virtual resource block number, p=0,1,2 ..., P-1.
Disperse transmission when having only, promptly during Q=0, give all RM/k the unified numbering of sub-frequency patterns, for example original i
0The j of individual frequency patterns
0The unification of individual sub-frequency patterns is numbered z=i
0R+j
0, i wherein
0=0,1,2 ..., M/k-1, j
0=0,1,2 ..., R-1, z=0,1,2 ..., RM/k-1. distributes to pattern order virtual resource blocks according to sequence number with the period of the day from 11 p.m. to 1 a.m then frequently, gives the little period of the day from 11 p.m. to 1 a.m of the little dispersion virtual resource blocks priority allocation sequence number of sequence number pattern frequently.
Disperse transmission when existing concentration of transmissions has again, promptly Q ≠ 0 o'clock has Q Physical Resource Block to be used for concentration of transmissions, then has the individual sub-frequency patterns of R-Q can distribute to the dispersion virtual resource blocks in each frequency patterns.Can distribute to the unified numbering of (R-Q) M/k sub-frequency patterns of disperseing transmission for these, Z=0,1,2, ..., (R-Q) M/k-1 distributes to pattern order virtual resource blocks according to sequence number with the period of the day from 11 p.m. to 1 a.m then frequently, gives the little period of the day from 11 p.m. to 1 a.m of the little dispersion virtual resource blocks priority allocation sequence number of sequence number pattern frequently.
According to the above method, each period of the day from 11 p.m. to 1 a.m of each frequency patterns pattern position in Physical Resource Block frequently can be according to application number: 200610005696.2,200610006600.4 or/and 200610002999.9 the method that patent provided determine, concrete definite process sees above-mentioned disclosed patent for details, does not repeat them here.These methods have guaranteed from disturbing between any two frequency patterns of different districts or the frequency patterns segment very little.When concentration of transmissions has taken a part of Physical Resource Block, the design of frequency patterns remains unchanged, virtual resource blocks will be got a part of period of the day from 11 p.m. to 1 a.m frequency pattern of frequency patterns, promptly get the segment of frequency patterns, and this way guarantees that original interference randomization is still effective.
Each frequency patterns all has distribution in each Physical Resource Block, guaranteed frequency diversity gain.Especially smaller when the value of k, a virtual resource blocks will take a plurality of frequency patterns, and such virtual resource blocks can be mapped in same Physical Resource Block on the discontinuous frequency range, compared with prior art, has realized frequency diversity more fully.
The frequency patterns of each sub-district is pre-designed, is that base station and user are in common knowledge.Therefore for dispersion transmission user, only need know that each disperses virtual resource blocks to comprise which period of the day from 11 p.m. to 1 a.m frequency pattern, can learn the mapping relations of each virtual resource block to physical resource block, thereby learn the actual situation that takies running time-frequency resource of each virtual resource blocks.
Illustrate this programme below from disperseing the mapping method of virtual resource block to physical resource block.Still adopt the example of mentioning in the prior art one.
There are 12 Physical Resource Block in the system of a 5M bandwidth in a subframe, wherein 8 are used for concentration of transmissions, has 3 to disperse virtual resource blocks to be mapped in the physical channel.Still get M=25, N=7.
According to above-mentioned condition, R=12, P=3, Q=8.Continue to use the Physical Resource Block position that concentration of transmissions takies in prior art one given example, obtain j=0,1,3,4,6,7,9,10 Physical Resource Block is taken by concentration of transmissions.
The situation of getting k=1 here is that example describes.Owing to there are 8 Physical Resource Block to be taken by concentration of transmissions, thus have only 4 sub-frequency patterns in each frequency patterns, i.e. j=2,5,8,11 period of the day from 11 p.m. to 1 a.m pattern frequently can be assigned to the dispersion virtual resource blocks, has 4 * 25=100 such period of the day from 11 p.m. to 1 a.m pattern frequently.Sequentially per 25 sub-frequency patterns are distributed to a virtual resource blocks then.That is:
The dispersion virtual resource blocks of p=0 takies i=0, and 1,2,3,4, j=2 in 5 the frequency patterns, 5,8,11 the period of the day from 11 p.m. to 1 a.m is pattern frequently, and the period of the day from 11 p.m. to 1 a.m pattern frequently of j=2 in the frequency patterns of i=6;
The dispersion virtual resource blocks of p=1 takies j=5 in the frequency patterns of i=6, and 8,11 the period of the day from 11 p.m. to 1 a.m is pattern frequently, i=7, and j=2 in 8,9,10,11 the frequency patterns, 5,8,11 the period of the day from 11 p.m. to 1 a.m is pattern frequently, and j=2 in the frequency patterns of i=12, and 5 the period of the day from 11 p.m. to 1 a.m is pattern frequently;
The dispersion virtual resource blocks of p=2 takies j=8 in the frequency patterns of i=12, and 11 the period of the day from 11 p.m. to 1 a.m is pattern frequently, i=13, and j=2 in 14,15,16,17 the frequency patterns, 5,8,11 the period of the day from 11 p.m. to 1 a.m is pattern frequently, and j=2 in the frequency patterns of i=18, and 5,8 the period of the day from 11 p.m. to 1 a.m is pattern frequently.
As shown in Figure 4, for the running time-frequency resource of the dispersion virtual resource blocks of p=0 takies situation, the example among the figure has adopted a kind of special frequency patterns, i.e. each period of the day from 11 p.m. to 1 a.m identical pattern of sub-carrier positions of taking on the distinct symbols in Physical Resource Block of pattern frequently.The figure on the left side represents the dispersion virtual resource blocks of p=0 among Fig. 3,7 frequency patterns of this virtual resource blocks are distributed in 7 middle figure expressions, and the figure on the right has provided 3 Physical Resource Block in 12 Physical Resource Block; The part that has various decorative patterns among the figure represents that the dispersion virtual resource blocks of distributing to p=0 uses, and grey color part represents to distribute to the use of concentration of transmissions, and white portion is represented to distribute to other dispersion virtual resource blocks and used or be not assigned with.Disperse the Arabic numerals on virtual resource blocks and Physical Resource Block the right to represent subcarrier number 0-24, the Arabic numerals on frequency patterns the right are represented period of the day from 11 p.m. to 1 a.m pattern numbering 0-11 frequently.
In addition, the present invention also provides a kind of distributor of running time-frequency resource, and the structural representation of described device sees Fig. 5 for details.To distribute running time-frequency resource, described virtual resource blocks comprises to be concentrated virtual resource blocks and disperses virtual resource blocks the resource that described device is used for determining each virtual resource blocks in the position of Physical Resource Block; Wherein, described device comprises: physical resource dividing unit 51, time-frequency pattern setting unit 52 and time-frequency resource distributing unit 53.Wherein, described physical resource dividing unit 51 is used for whole time-frequency plane is divided into R equal-sized Physical Resource Block, and each Physical Resource Block comprises on M the frequency domain continuous symbol on continuous sub-carriers and N the time domain, R wherein, and M and N are positive integer; Described time-frequency pattern setting unit 52 links to each other with physical resource dividing unit 51, is used to each sub-district that the frequency patterns of one group of quadrature is set, and fills up whole time-frequency plane with it; A kind of concrete time-frequency pattern setting unit function is: for each sub-district is provided with the frequency patterns of one group of equal and opposite in direction and quadrature, and determine that the size of each frequency patterns is: k * R * N; The number of described frequency patterns is: M/k, k are any one approximate numbers of M; The function of this time-frequency pattern setting unit further is: can be by R equal-sized period of the day from 11 p.m. to 1 a.m frequency patterns of pattern formation frequently is set, the running time-frequency resource that the individual sub-frequency patterns of described R takies lays respectively in R the different Physical Resource Block, and each period of the day from 11 p.m. to 1 a.m frequency pattern takies k subcarrier on each symbol.Described time-frequency resource distributing unit 53, link to each other respectively with time-frequency pattern setting unit 52 with physical resource dividing unit 51, be used for Physical Resource Block is distributed to concentrated virtual resource blocks or/and disperse virtual resource blocks, the segment that wherein will be distributed in the frequency patterns of disperseing in the transmitting physical Resource Block or frequency patterns is distributed to one and is disperseed virtual resource blocks, and described dispersion transmitting physical Resource Block refers to distributes to the Physical Resource Block that disperses virtual resource blocks.Wherein frequency patterns is distributed to and disperseed the concrete function of virtual resource blocks to be: be used for the period of the day from 11 p.m. to 1 a.m frequency pattern of frequency patterns is distributed to the dispersion virtual resource blocks, the running time-frequency resource that wherein said period of the day from 11 p.m. to 1 a.m frequency pattern takies is arranged in distributes to the Physical Resource Block that disperses transmission; A kind of function more specifically can be, the sequence number that frequency patterns is set respectively and disperses virtual resource blocks, and the part that is not taken by concentration of transmissions in the described frequency patterns sequentially distributed to the dispersion virtual resource blocks by sequence number, and when last frequency patterns segment of a virtual resource blocks is distributed in a segment conduct of a frequency patterns, distribute next segment of this frequency patterns first frequency patterns segment as next virtual resource blocks; Can also utilize the period of the day from 11 p.m. to 1 a.m division of pattern frequently to simplify the operation, promptly the function of this resource allocation unit can more specifically be described as, be provided with respectively and disperse the virtual resource blocks and the period of the day from 11 p.m. to 1 a.m sequence number of pattern frequently, wherein said period of the day from 11 p.m. to 1 a.m pattern frequently is arranged in the Physical Resource Block of distributing to the dispersion transmission, and described period of the day from 11 p.m. to 1 a.m frequency pattern is sequentially distributed to the dispersion virtual resource blocks by sequence number.
The realization function of each unit of the above device sees also the specific implementation process of said method, does not repeat them here.
In addition, the present invention provides a kind of wireless communication system again, and the structural representation of described system sees Fig. 6 for details.Described system comprise base station 61 and with the travelling carriage 62 of base station communication, wherein said base station comprises time-frequency resource allocating device 611, the resource that is used for determining each virtual resource blocks wherein disperses the position of virtual resource blocks in Physical Resource Block to distribute according to frequency patterns in the position of Physical Resource Block; And described base station is used for notifying travelling carriage with the resource of each virtual resource blocks in the running time-frequency resource information of physical resource piece position; Described travelling carriage 62 according to the running time-frequency resource information of resource position in the physical resource piece of each received virtual resource blocks, is adjusted the time-frequency position that is used to the information that receives.Described time-frequency resource allocating device 611 comprises: physical resource dividing unit 6111, time-frequency pattern setting unit 6112 and time-frequency resource distributing unit 6113, wherein, the function of each unit is identical with effect with the function of unit described in Fig. 5 with effect, specifically referring to above-mentioned, does not repeat them here.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (17)
1, a kind of distribution method of running time-frequency resource is characterized in that, comprises step:
A, whole time-frequency plane is divided into R equal-sized Physical Resource Block, each Physical Resource Block comprises on M the frequency domain continuous symbol on continuous sub-carriers and N the time domain, R wherein, and M and N are positive integer;
B, for each sub-district is provided with the frequency patterns of one group of quadrature, and fill up whole time-frequency plane with it;
C, Physical Resource Block distributed to concentrate virtual resource blocks or/and disperse virtual resource blocks, the segment that wherein will be distributed in the frequency patterns of disperseing in the transmitting physical Resource Block or frequency patterns is distributed to one and is disperseed virtual resource blocks, and described dispersion transmitting physical Resource Block is meant distributes to the Physical Resource Block that disperses virtual resource blocks.
2, according to the distribution method of the described running time-frequency resource of claim 1, it is characterized in that, the frequency patterns of one group of equal and opposite in direction and quadrature is set for each sub-district described in the step B, and determine the size of each frequency patterns and the number of time-frequency pattern, wherein said each frequency patterns size is: k * R * N; The number of described frequency patterns is: M/k, k are any one approximate numbers of M.
3, according to the distribution method of the described running time-frequency resource of claim 2, it is characterized in that, R equal-sized period of the day from 11 p.m. to 1 a.m frequency patterns of pattern formation frequently is set, the running time-frequency resource that the individual sub-frequency patterns of described R takies lays respectively in R the different Physical Resource Block, and each period of the day from 11 p.m. to 1 a.m frequency pattern takies k subcarrier on each symbol.
According to the distribution method of the described running time-frequency resource of claim 1, it is characterized in that 4, the frequency patterns group that is provided with for different districts among the step B is identical or inequality.
5, according to the distribution method of the described running time-frequency resource of claim 1, it is characterized in that, described in the step C Physical Resource Block distributed to concentrated virtual resource blocks or/and disperse virtual resource blocks specifically to comprise:
Physical Resource Block is all distributed to concentrated virtual resource blocks or all distributed to the dispersion virtual resource blocks, perhaps
A part of Physical Resource Block is distributed to concentrated virtual resource blocks, all the other Physical Resource Block are distributed to the dispersion virtual resource blocks.
6, according to the distribution method of each described running time-frequency resource of claim 1 to 5, it is characterized in that, the period of the day from 11 p.m. to 1 a.m in frequency patterns frequency pattern is distributed to the dispersion virtual resource blocks, and the running time-frequency resource that wherein said period of the day from 11 p.m. to 1 a.m frequency pattern takies is arranged in distributes to the Physical Resource Block that disperses transmission.
7, distribution method according to the described running time-frequency resource of claim 1, it is characterized in that, described in the step C frequency patterns being distributed to disperses the detailed process of virtual resource blocks to be: respectively to frequency patterns with disperse the virtual resource block sequencing, and the part that is not taken by concentration of transmissions in the described frequency patterns sequentially distributed to the dispersion virtual resource blocks, and when last frequency patterns segment of a virtual resource blocks is distributed in a segment conduct of a frequency patterns, distribute next segment of this frequency patterns first frequency patterns segment as next virtual resource blocks.
8, according to the distribution method of the described running time-frequency resource of claim 7, it is characterized in that, described frequency patterns is distributed to disperses the detailed process of virtual resource blocks to be: respectively to disperseing the pattern ordering frequently of the virtual resource blocks and the period of the day from 11 p.m. to 1 a.m, wherein said period of the day from 11 p.m. to 1 a.m frequency pattern is arranged in distributes to the Physical Resource Block that disperses transmission; And the described period of the day from 11 p.m. to 1 a.m distributed to pattern order the dispersion virtual resource blocks frequently.
According to the distribution method of the described running time-frequency resource of claim 1, it is characterized in that 9, described method also comprises: one or more virtual resource blocks are distributed to a kind of channel or user's use.
10, a kind of distributor of running time-frequency resource, the resource that is used for determining each virtual resource blocks are in the position of Physical Resource Block, and to distribute running time-frequency resource, described virtual resource blocks comprises to be concentrated virtual resource blocks and disperse virtual resource blocks; It is characterized in that, comprising:
Physical resource dividing unit is used for whole time-frequency plane is divided into R equal-sized Physical Resource Block, and each Physical Resource Block comprises on M the frequency domain continuous symbol on continuous sub-carriers and N the time domain, R wherein, and M and N are positive integer;
Time-frequency pattern setting unit links to each other with physical resource dividing unit, is used to each sub-district that the frequency patterns of one group of quadrature is set, and fills up whole time-frequency plane with it;
Time-frequency resource distributing unit, link to each other respectively with time-frequency pattern setting unit with physical resource dividing unit, be used for Physical Resource Block is distributed to concentrated virtual resource blocks or/and disperse virtual resource blocks, the segment that wherein will be distributed in the frequency patterns of disperseing in the transmitting physical Resource Block or frequency patterns is distributed to one and is disperseed virtual resource blocks, and described dispersion transmitting physical Resource Block is meant distributes to the Physical Resource Block that disperses virtual resource blocks.
11, according to the described time-frequency resource allocating device of claim 10, it is characterized in that, described time-frequency pattern setting unit, be used to each sub-district that the frequency patterns of one group of equal and opposite in direction and quadrature is set, and determine the size of each frequency patterns and the number of time-frequency pattern, wherein said each frequency patterns size is: k * R * N; The number of described frequency patterns is: M/k, k are any one approximate numbers of M.
12, according to the described time-frequency resource allocating device of claim 11, it is characterized in that, described time-frequency pattern setting unit, be used to be provided with R equal-sized period of the day from 11 p.m. to 1 a.m frequency patterns of pattern formation frequently, the running time-frequency resource that the individual sub-frequency patterns of described R takies lays respectively in R the different Physical Resource Block, and each period of the day from 11 p.m. to 1 a.m frequency pattern takies k subcarrier on each symbol.
13, according to any described time-frequency resource allocating device of claim 10 to 12, it is characterized in that, described time-frequency resource distributing unit, be used for the period of the day from 11 p.m. to 1 a.m frequency pattern of frequency patterns is distributed to the dispersion virtual resource blocks, the running time-frequency resource that wherein said period of the day from 11 p.m. to 1 a.m frequency pattern takies is arranged in distributes to the Physical Resource Block that disperses transmission.
14, according to the described time-frequency resource allocating device of claim 10, it is characterized in that, described time-frequency resource distributing unit, be used for frequency patterns is distributed to the dispersion virtual resource blocks, specifically be used for respectively to frequency patterns and dispersion virtual resource block sequencing, and the part that is not taken by concentration of transmissions in the described frequency patterns sequentially distributed to the dispersion virtual resource blocks, and when last frequency patterns segment of a virtual resource blocks is distributed in a segment conduct of a frequency patterns, distribute next segment of this frequency patterns first frequency patterns segment as next virtual resource blocks.
15, according to the described time-frequency resource allocating device of claim 14, it is characterized in that, described time-frequency resource distributing unit, be used for frequency patterns is distributed to the dispersion virtual resource blocks, specifically be used for respectively dispersion virtual resource blocks and period of the day from 11 p.m. to 1 a.m frequency pattern being sorted, wherein said period of the day from 11 p.m. to 1 a.m frequency pattern is arranged in distributes to the Physical Resource Block that dispersion is transmitted; And the described period of the day from 11 p.m. to 1 a.m distributed to pattern order the dispersion virtual resource blocks frequently.
16, a kind of wireless communication system, it is characterized in that, described system comprise the base station and with the travelling carriage of base station communication, wherein said base station comprises the time-frequency resource allocating device, the resource that is used for determining each virtual resource blocks wherein disperses the position of virtual resource blocks in Physical Resource Block to distribute according to frequency patterns in the position of Physical Resource Block; And described base station is used for notifying travelling carriage with the resource of each virtual resource blocks in the running time-frequency resource information of physical resource piece position;
Described travelling carriage according to the running time-frequency resource information of resource position in the physical resource piece of each received virtual resource blocks, is adjusted the time-frequency position that is used to the information that receives.
According to the described wireless communication system of claim 16, it is characterized in that 17, described time-frequency resource allocating device comprises:
Physical resource dividing unit is used for time-frequency plane is divided into R equal-sized Physical Resource Block, and each Physical Resource Block comprises on M the frequency domain continuous symbol on continuous sub-carriers and N the time domain, R wherein, and M and N are positive integer;
Time-frequency pattern setting unit links to each other with physical resource dividing unit, for each sub-district the frequency patterns of one group of quadrature is set according to running time-frequency resource, and fills up whole time-frequency plane with it;
Time-frequency resource distributing unit, link to each other respectively with time-frequency pattern setting unit with physical resource dividing unit, Physical Resource Block is distributed to concentrated virtual resource blocks or/and disperse virtual resource blocks, the segment that wherein will be distributed in the frequency patterns of disperseing in the transmitting physical Resource Block or frequency patterns is distributed to one and is disperseed virtual resource blocks, and described dispersion transmitting physical Resource Block is meant distributes to the Physical Resource Block that disperses virtual resource blocks.
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| PCT/CN2007/001308 WO2007131413A1 (en) | 2006-04-28 | 2007-04-20 | An allocation method of time-frequency resources and the apparatus and wireless communication system thereof |
| CNA2007800134273A CN101421947A (en) | 2006-04-28 | 2007-04-20 | An allocation method of time-frequency resources and the apparatus and wireless communication system thereof |
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| WO2007131413A1 (en) | 2007-11-22 |
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