CN108923903A - Pilot distribution method, system and the electronic equipment of multiaerial system - Google Patents
Pilot distribution method, system and the electronic equipment of multiaerial system Download PDFInfo
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- CN108923903A CN108923903A CN201810670057.0A CN201810670057A CN108923903A CN 108923903 A CN108923903 A CN 108923903A CN 201810670057 A CN201810670057 A CN 201810670057A CN 108923903 A CN108923903 A CN 108923903A
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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
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0691—Hybrid systems, i.e. switching and simultaneous transmission using subgroups of transmit antennas
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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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
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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
- H04L5/0058—Allocation criteria
- H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
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Abstract
Pilot distribution method, system and the electronic equipment of a kind of multiaerial system provided in an embodiment of the present invention, area group to be optimized can be determined according to the pilot tone repetitive rate of cell, the interference strength of user is determined according to the distance of user to base station and transmission power in area group to be optimized, according to interference strength successively to subscriber segmentation pilot tone, to realize the reasonable distribution of pilot tone, pilot pollution is reduced.
Description
Technical field
The present invention relates to wireless communication system technologies fields, more particularly to a kind of pilot tone distribution side of multiaerial system
Method, system and electronic equipment.
Background technique
So far, the business demand of user is growing for Mobile Communication Development, this just proposes data transmission bauds higher
Requirement.In view of the scarcity of frequency spectrum resource, the utilization rate for sufficiently promoting frequency spectrum resource is still the weight for meeting business demand
Want one of means.The availability of frequency spectrum of extensive multi-antenna technology is used as 5G core technology up to tens to bps/Hz up to a hundred
One of, in the case where frequency spectrum resource day is more rare, possess huge advantage, is worth further investigation.
In multi-antenna systems, one pilot tone of each terminal distribution, base station carry out channel estimation according to pilot signal.But
When coherence time is shorter or intra-cell users number is more, different community user uses same set of pilot tone, leads to uplink
Pilot signal interference is serious.When serving BS receives the pilot signal of some terminal for channel estimation, actual estimated knot
Fruit is this cell and other cells share the linear combination of the pilot signal that the user of same pilot tone sends, and at this moment channel estimation has been
Through contaminated, this phenomenon is known as pilot pollution.
Therefore, how to realize the reasonable distribution of pilot tone, thus effectively solve the pilot pollution problem, become one it is urgently to be resolved
The problem of.
Summary of the invention
The pilot distribution method for being designed to provide a kind of multiaerial system, system and the electronics of the embodiment of the present invention are set
It is standby, to realize the reasonable distribution of pilot tone, reduce pilot pollution.
In order to achieve the above objectives, the embodiment of the invention discloses a kind of pilot distribution methods of multiaerial system, including such as
Lower step：
Determine the pilot tone vector of each cell in Target cell group, wherein it include element 1 and 0 in the pilot tone vector, it is any
Element 1 at position indicates that pilot tone corresponding with the position is occupied in default pilot frequency sequence, and the element 0 at any position indicates
Pilot tone corresponding with the position is unoccupied in default pilot frequency sequence；
The pilot tone repetitive rate between cell two-by-two is calculated according to the pilot tone vector of each cell；
According to the pilot tone repetitive rate, it is default to calculate other cells satisfaction first in any cell and the Target cell group
The sum of pilot tone repetitive rate of condition sum value is more conform with each sum value of condition two-by-two, will meet the sum value of the second preset condition
Corresponding area group is as area group to be optimized；
For each area group to be optimized, based on any user in the area group to be optimized to respective base station away from
The user is determined to the interference strength of the base station, in the area group to be optimized by force according to the interference from transmission power
The size of degree is followed successively by each user in the area group to be optimized and distributes pilot tone.
Optionally, the pilot tone vector of each cell includes in the determining Target cell group：
Determine that the pilot tone of each cell distributes priority according to payload size in the Target cell group；
The sequence of priority from big to small is distributed according to the pilot tone, successively determines the pilot tone vector of each cell.
Optionally, the pilot tone repetitive rate according between the calculating of the pilot tone vector of each cell two-by-two cell includes：
It obtains and is repeated in first community pilot tone vector sum second community pilot tone vector and the number of nonzero element is as molecule,
It obtains the sum of nonzero element number and nonzero element number in second community pilot tone vector in first community pilot tone vector and is used as and divide
The ratio of mother, the molecule and the denominator are the pilot tone repetitive rate of the first community Yu the second community, and described the
One cell and the second community are arbitrary cells in each cell.
Optionally, described according to the pilot tone repetitive rate, calculate other cells in any cell and the Target cell group
Meeting the sum of the pilot tone repetitive rate of the first preset condition sum value includes：
When other cells have at least two pilot tones for being greater than first threshold to repeat in any cell and the Target cell group
When rate, expire described as the cell with other cells in the Target cell group greater than the sum of pilot tone repetitive rate of first threshold
The sum of the pilot tone repetitive rate of the first preset condition of foot sum value；
When any cell and other cells in the Target cell group, only one is greater than the pilot tone weight of the first threshold
Multiple rate, and also only one is greater than institute to other cells on corresponding position in the cell after row-column transform and the Target cell group
When stating the pilot tone repetitive rate of first threshold, using the pilot tone repetitive rate greater than first threshold as the pilot tone repetitive rate of the cell
The sum of sum value；The sum of district pilots repetitive rate after row-column transform sum value is 0.
Optionally, each sum value for being more conform with condition two-by-two will meet corresponding to the sum value of the second preset condition
Area group include as area group to be optimized：
When the pilot tone repetitive rate of two cells corresponding to the sum value compared two-by-two is not zero, more each sun two-by-two
Value, selects the maximum sum value of numerical value, using area group corresponding to the maximum sum value of the numerical value as the cell to be optimized
Group.
Optionally, described to be directed to each area group to be optimized, it is arrived based on any user in the area group to be optimized
The distance and transmission power of respective base station determine that the user includes to the interference strength of the base station：
For each area group to be optimized, calculate any user in the area group to be optimized to respective base station away from
In the first ratio and the cell to be optimized from the average value in the cell to be optimized at a distance from all users to the base station
The user be averaged to all users in the base station transmitting power and the area group to be optimized to the base station transmitting power
Second ratio of value；
By the sum of first ratio and second ratio as the user to the interference strength of the base station.
Optionally, described to be followed successively by the cell to be optimized according to the size of the interference strength in the area group to be optimized
Each user's distribution pilot tone includes in group：
In the area group to be optimized, according to the corresponding pilot tone vector of the area group to be optimized, it is higher than for interference strength
The user of two threshold values is sequentially allocated different pilot tones；
Identical pilot tone is distributed lower than the user of the second threshold for interference strength.
In order to achieve the above objectives, the embodiment of the invention also discloses a kind of pilot tone distribution systems of multiaerial system, including：
Pilot tone vector determination unit, for determining the pilot tone vector of each cell in Target cell group, wherein the pilot tone to
It include element 1 and 0 in amount, the element 1 at any position indicates that pilot tone corresponding with the position is occupied in default pilot frequency sequence,
Element 0 at any position indicates that pilot tone corresponding with the position is unoccupied in default pilot frequency sequence；
Pilot tone repetitive rate computing unit, for calculating the pilot tone between cell two-by-two according to the pilot tone vector of each cell
Repetitive rate；
Area group determination unit to be optimized, for calculating any cell and the target being small according to the pilot tone repetitive rate
Other cells meet the sum of the pilot tone repetitive rate of the first preset condition sum value in Qu Qun, are more conform with each sum of condition two-by-two
Value, using area group corresponding to the sum value for meeting the second preset condition as area group to be optimized；
Pilot tone allocation unit, for being directed to each area group to be optimized, based on any in the area group to be optimized
The distance and transmission power of user to respective base station determine the user to the interference strength of the base station, in the cell to be optimized
Each user in the area group to be optimized, which is followed successively by, according to the size of the interference strength in group distributes pilot tone.
Optionally, the pilot tone allocation unit further includes interference strength determination unit and pilot tone distribution subelement；
The interference strength determination unit is specifically used for being directed to each area group to be optimized, it is to be optimized small to calculate this
The distance of any user to respective base station in Qu Qun is flat at a distance from all users to the base station in the cell to be optimized
In the user to the base station transmitting power and the area group to be optimized in first ratio of mean value and the cell to be optimized
Second ratio of all users to the base station transmitting power average value；The sum of first ratio and second ratio are made
It is the user to the interference strength of the base station.
The pilot tone distributes subelement, is specifically used in the area group to be optimized, corresponding according to the area group to be optimized
Pilot tone vector, for interference strength be higher than second threshold user be sequentially allocated different pilot tones；It is interference strength lower than described
The user of second threshold distributes identical pilot tone.
In order to achieve the above objectives, the embodiment of the invention also discloses a kind of electronic equipment, including processor, communication interface,
Memory and communication bus, wherein the processor, the communication interface, the memory are completed by the communication bus
Mutual communication；
The memory, for storing computer program；
The processor when for executing the program stored on memory, realizes any of the above-described method and step.
Pilot distribution method, system and the electronic equipment of a kind of multiaerial system provided in an embodiment of the present invention, Ke Yigen
Determine area group to be optimized according to the pilot tone repetitive rate of cell, in area group to be optimized according to the distance of user to base station and
Transmission power determines the interference strength of user, according to interference strength successively to subscriber segmentation pilot tone, to realize the reasonable of pilot tone
Distribution reduces pilot pollution.Certainly, implement any of the products of the present invention or method it is not absolutely required at the same reach described above
All advantages.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of flow diagram of the pilot distribution method of multiaerial system provided in an embodiment of the present invention；
Fig. 2 is a kind of extensive multiple antennas cellular cell network deployment scenarios figure that present invention implementation provides；
Fig. 3 is a kind of pilot tone repetitive rate table provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of the pilot tone distribution system of multiaerial system provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of a kind of electronic equipment provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in FIG. 1, FIG. 1 is a kind of processes of the pilot distribution method of multiaerial system provided in an embodiment of the present invention to show
It is intended to.
S101：Determine the pilot tone vector of each cell in Target cell group, wherein include 1 He of element in above-mentioned pilot tone vector
0, the element 1 at any position indicates that pilot tone corresponding with the position is occupied in default pilot frequency sequence, the member at any position
Element 0 indicates that pilot tone corresponding with the position is unoccupied in default pilot frequency sequence.
As shown in Fig. 2, Fig. 2 is extensive multiple antennas cellular cell network deployment scenarios figure.In order to make it easy to understand, above-mentioned mesh
Mark area group can be such as the cell in the large-scale multi-antenna system in Fig. 2, in an embodiment of the present invention, cell
Number L is 19, and number of cells can be more in practice, further include a base station and several users in each cell.
First it is noted that the default pilot frequency sequence referred in the present invention all is led used by referring in the present invention
The general name of frequency.Specifically, including multiple pilot tones in above-mentioned default pilot frequency sequence, and pilot tone number is greater than above-mentioned Target cell group
In any cell number of users.It include element 0 and 1 in pilot tone vector, 1 in any district pilots vector indicates any small differentiation
Matched the pilot tone with default pilot frequency sequence opposite position, 0 in any district pilots vector indicate any cell it is unallocated with
The pilot tone of default pilot frequency sequence opposite position.
In order to determine the pilot tone vector of each cell in above-mentioned Target cell group, according to negative first in above-mentioned Target cell group
Carry the pilot tone distribution priority that size determines above-mentioned each cell；The sequence of priority from big to small is distributed according to above-mentioned pilot tone, according to
The pilot tone vector of the secondary above-mentioned each cell of determination.It is preferably that the biggish cell distribution pilot tone of load can preferentially be alleviated by pilot pollution
Influence serious cell.
Specifically, as shown in Fig. 2, successively marking each cell, label according to each cell load in above-mentioned Target cell group
It is smaller to show that load is bigger, it is preferably the forward cell distribution pilot tone of label, in an embodiment of the present invention, such as i small
Area is the forward cell of label, then distributing pilot tone for i cell, the user of i cell is k, is first determined whether small around i cell
Whether area distributes pilot tone.
In an embodiment of the present invention, if above-mentioned i cell peripheral cell is not previously allocated pilot tone, above-mentioned i
Cell is then assigned the preceding k of above-mentioned default pilot frequency sequence, the pilot tone vector of above-mentioned i cell be (1,1 ... 1,0,0 ... 0),
In, i cell peripheral cell refers to that the cell for having boundary overlapping with i cell can be around i cell in order to more intuitively understand
Cell is interpreted as in Fig. 2 six cells around each cell.
In an embodiment of the present invention, if cell around above-mentioned i cell assigned pilot tone, i.e., above-mentioned i
Pilot tone is assigned in any user in any cell in cell peripheral cell, is all considered as and pilot tone is assigned.So obtain
The pilot tone vector of above-mentioned i cell peripheral cell, and vector summation is carried out to the pilot tone vector of above-mentioned i cell peripheral cell, according to
I cell, such as i cell week are distributed to the pilot tone on the default pilot frequency sequence corresponding position of the selection of vector element value from small to large
The pilot tone vector for enclosing cell be respectively (1,1 ... 1,0,0 ... 0), (0,0 ... 0,0,0 ... 0), (0,1 ..., 1,0 ... 0),
(0,0 ... 1,1,1 ... 0), (1,0 ... 0,0,1 ... 1), (0,0 ... 0,0,0 ... 0), then with vector element value be (2,
2 ... 3,1,2 ... 1), then the pilot tone vector of i cell may be updated as, (0,0 ... 0,1,1 ... 1).
It is understood that it is above-mentioned be in Target cell group each cell distribution pilot tone vector be for each cell distribution lead
Frequently, above-mentioned pilot distribution method makes each cell and peripheral cell not use the same pilot tone as far as possible, from the secondary angle gone
Reduce the influence of pilot pollution.
S102：The pilot tone repetitive rate between cell two-by-two is calculated according to the pilot tone vector of above-mentioned each cell.
In order to further obtain cell to be optimized in above-mentioned Target cell group, first have to calculate above-mentioned Target cell group
In the pilot tone repetitive rate between cell two-by-two.
Specifically, in an embodiment of the present invention, remembering first community and second community being in above-mentioned Target cell
Any two cell, will in first community pilot tone vector sum second community pilot tone vector repeat and nonzero element number as divide
Son, it is to be understood that repeated in first community pilot tone vector sum second community pilot tone vector and nonzero element refers to first community
Pilot tone vector and second community pilot tone vector are all element 1 on corresponding position；By nonzero element in first community pilot tone vector
The sum of nonzero element number is used as denominator in number and second community pilot tone vector；Above-mentioned first community and above-mentioned second community
Pilot tone repetitive rate is the ratio of above-mentioned molecule and denominator.Those skilled in the art will be appreciated that using above-mentioned pilot tone weight
The calculation method of multiple rate can calculate the pilot tone repetitive rate in above-mentioned Target cell group between any cell two-by-two.
S103：According to above-mentioned pilot tone repetitive rate, calculates other cells in any cell and above-mentioned Target cell group and meet the
The sum of pilot tone repetitive rate of one preset condition sum value is more conform with each sum value of condition two-by-two, will meet the second preset condition
Sum value corresponding to area group as area group to be optimized.
In obtaining any cell and above-mentioned Target cell group after the pilot tone repetitive rate of other cells, in order to preferably retouch
It states, in an embodiment of the present invention, above-mentioned pilot tone repetitive rate can be formed into pilot tone repetitive rate table.
Specifically, Fig. 3 is a kind of pilot tone repetitive rate table provided in an embodiment of the present invention, it is opposite with above-mentioned cell number L
It answers, pilot tone repetitive rate table has L rows and L columns, and every a line indicates the pilot tone repetitive rate value of the row cell Yu other cells, Mei Yilie
Indicate the pilot tone repetitive rate value of the column cell Yu other cells.And R (1,2)=R (2,1), R (1,2) and R (2,1) are indicated
Cell marked as 1 and the pilot tone repetitive rate between the cell marked as 2.
The sum of the pilot tone repetitive rate for meeting the first preset condition sum value is retouched in detail below according to above-mentioned repetitive rate table
It states：
First threshold is defined first, and above-mentioned first threshold instructs the size of frequency repetitive rate, in a kind of embodiment of the invention
In, taking first threshold is 0.5, in every a line in above-mentioned pilot tone repetitive rate table, if at least there are two pilot tone repetitive rates
Value be greater than 0.5, then the sum of pilot tone repetitive rate of cell corresponding to the row and other cells sum value is just pilot tone in the row
The value of repetitive rate is greater than 0.5 the sum of pilot tone repetitive rate.
In every a line in above-mentioned pilot tone repetitive rate table, if the value of only one pilot tone repetitive rate is greater than the first threshold
Value 0.5, and converted using row number corresponding to the pilot tone repetitive rate as line number, in newline, if on corresponding position
Pilot tone repetitive rate value be greater than first threshold 0.5, and in newline only have this pilot tone repetitive rate value be greater than first
Threshold value 0.5, then being greater than first threshold in the sum of pilot tone repetitive rate of cell corresponding to old row and other cells sum value row
Pilot tone repetitive rate value, the sum of pilot tone repetitive rate of cell and other cells corresponding to newline sum value is 0, or opposite.
It should be noted that the sum of pilot tone repetitive rate of every a line in embodiment of the present invention sum value refers to each row
In be greater than first threshold the sum of pilot tone repetitive rate.
The sum of pilot tone repetitive rate using the available every a line of above method sum value, when the sum value institute compared two-by-two
When the pilot tone repetitive rate of corresponding two cells is not zero, more each sun value two-by-two, it is to be understood that the sum value of every a line
A row cell is all corresponded to, when the pilot tone repetitive rate of two row cells corresponding to the two sum values to compare is not 0,
Compare the two sum values.
Maximum sum value is selected after more each sum value two-by-two, using area group corresponding to above-mentioned maximum sum value as to excellent
Change area group；The pilot tone repetitive rate ratio between corresponding row cell and column cell it is understood that maximum sum value is expert at
It is larger, so row cell and column cell that maximum sum value is expert at corresponding are all the cells for needing to optimize, it is especially maximum
Row cell corresponding to sum value is even more to need to optimize, will be maximum by cell centered on row cell corresponding to maximum sum value
Peripheral cell of the column cell as above-mentioned center cell corresponding to sum value, the two collectively constitute area group to be optimized.
It is understood that in an embodiment of the present invention, the sum value greater than certain threshold value can also be selected, it will
The center cell to be optimized as other of row cell corresponding to the above-mentioned sum value greater than certain threshold value, will be greater than certain threshold value
Sum value corresponding to peripheral cell of the column cell as respective center cell.Multiple area groups to be optimized are thus obtained.
It should be noted that the sum of the establishment of center cell and pilot tone repetitive rate sum value have positive correlation.
It is understood that since each cell has determined that pilot tone vector, so having different community shares one
The case where pilot tone, can alleviate pilot tone dirt then the maximum area group to be optimized of sum value is preferentially optimised to a certain extent
Dye.
S104：For each above-mentioned area group to be optimized, based on any user in the area group to be optimized to corresponding base
The distance and transmission power stood determine above-mentioned user to the interference strength of above-mentioned base station, according to above-mentioned in the area group to be optimized
The size of interference strength is followed successively by each user in the area group to be optimized and distributes pilot tone.
Since the step of for each area group to be optimized is similar, an area group to be optimized is selected to be retouched in detail now
It states：
In order to further inhibit pilot pollution, need to segment pilot tone in terms of the user perspective in area group, to mention
Rise system performance.
Specifically, obtained in each cell in area group to be optimized each user in each cell to respective base station away from
From with transmission power, and calculate in each cell all users to the average value of respective base station distance and the average value of transmission power,
All define an interference strength for all users in each cell, it is to be understood that above-mentioned interference strength refer to it is above-mentioned to
Optimize the user in area group in each cell to the interference strength of respective base station.
In an embodiment of the present invention, the calculating of above-mentioned interference strength can be the first ratio and the second ratio
With；Wherein, the first ratio refers to that any user is useful to the distance of respective base station and institute in the cell to be optimized in cell to be optimized
Family to above-mentioned base station distance average value ratio, the second ratio refer to any user in the cell to be optimized to respective base station send out
All users are penetrated in power and the cell to be optimized to the ratio of above-mentioned base station transmitting power average value.
Using the above-mentioned method for seeking interference strength, the interference of each user can be obtained in above-mentioned area group to be optimized
Intensity, it is to be understood that the user for having interference strength high in each cell to be optimized.Also the use for having interference strength low
Family.
In an embodiment of the present invention, second threshold is set for above-mentioned interference strength, second threshold can be highest
The 50% of interference strength is higher than the use of second threshold for interference strength according to the corresponding pilot tone vector of each cell to be optimized
Family is sequentially allocated different pilot tones；Identical pilot tone is distributed lower than the user of above-mentioned second threshold for interference strength.
It is understood that each cell to be optimized has respective pilot tone vector, that is to say, that each is to be optimized
Area group is all assigned with certain pilot tone, and according to the interference strength of user, user's interference strength is carried out refinement point, keeps interference strong
The user that degree is higher than second threshold is sequentially allocated the pilot tone vector that different pilot tones can be understood as each user according to its each cell,
Above-mentioned interference strength will be distributed to without the pilot tone shared with other cells and/or the pilot tone less with the shared number of other cells
Higher than the user of second threshold；So that interference strength is distributed identical pilot tone lower than the user of above-mentioned second threshold can be understood as respectively
Pilot tone with other cells is distributed to above-mentioned interference strength and is lower than in second threshold by user according to the pilot tone vector of its each cell
User.
A kind of pilot distribution method of multiaerial system provided in an embodiment of the present invention can be repeated according to the pilot tone of cell
Rate determines area group to be optimized, determines user according to the distance of user to base station and transmission power in area group to be optimized
Interference strength to realize the reasonable distribution of pilot tone, it is dirty to reduce pilot tone according to interference strength successively to subscriber segmentation pilot tone
Dye.
As shown in figure 4, Fig. 4 is that a kind of structure of the pilot tone distribution system of multiaerial system provided in an embodiment of the present invention is shown
It is intended to,
Pilot tone vector determination unit 401, for determining the pilot tone vector of each cell in Target cell group, wherein above-mentioned to lead
It include element 1 and 0 in frequency vector, the element 1 at any position indicates pilot tone quilt corresponding with the position in default pilot frequency sequence
It occupies, the element 0 at any position indicates that pilot tone corresponding with the position is unoccupied in default pilot frequency sequence；
Pilot tone repetitive rate computing unit 402, for being calculated between cell two-by-two according to the pilot tone vector of above-mentioned each cell
Pilot tone repetitive rate；
Area group determination unit 403 to be optimized, for calculating any cell and above-mentioned target according to above-mentioned pilot tone repetitive rate
Other cells meet the sum of the pilot tone repetitive rate of the first preset condition sum value in area group, are more conform with each sum of condition two-by-two
Value, using area group corresponding to the sum value for meeting the second preset condition as area group to be optimized；
Pilot tone allocation unit 404, for being directed to each above-mentioned area group to be optimized, based on appointing in the area group to be optimized
The distance and transmission power of one user to respective base station determine above-mentioned user to the interference strength of above-mentioned base station, it is to be optimized small at this
Each user in the area group to be optimized, which is followed successively by, according to the size of above-mentioned interference strength in Qu Qun distributes pilot tone.
In an embodiment of the present invention, above-mentioned pilot tone vector determination unit 401 is specifically used in above-mentioned Target cell
Determine that the pilot tone of above-mentioned each cell distributes priority according to payload size in group；Priority is distributed from big to small according to above-mentioned pilot tone
Sequence, successively determine the pilot tone vector of above-mentioned each cell.
In an embodiment of the present invention, above-mentioned pilot tone repetitive rate computing unit 402 is specifically used for obtaining first community
It is repeated in pilot tone vector sum second community pilot tone vector and the number of nonzero element is as molecule, obtain first community pilot tone vector
The sum of nonzero element number is used as denominator, above-mentioned molecule and above-mentioned denominator in middle nonzero element number and second community pilot tone vector
Ratio be above-mentioned first community Yu above-mentioned second community pilot tone repetitive rate, above-mentioned first community and above-mentioned second community are
Arbitrary cells in above-mentioned each cell.
In an embodiment of the present invention, above-mentioned cell determination unit 403 to be optimized further includes sum value determination unit
4031 (not marking in figure) and area group to be optimized determine subelement 4032 (not marking in figure).
Above-mentioned sum value determination unit 4031, specifically for having when any cell with other cells in above-mentioned Target cell group
At least two when being greater than the pilot tone repetitive rate of first threshold, and above-mentioned being greater than the conduct of the sum of pilot tone repetitive rate of first threshold, this will be small
Area meets the sum of the pilot tone repetitive rate of the first preset condition sum value with other cells in above-mentioned Target cell group；
Or only one is greater than leading for above-mentioned first threshold when any cell and other cells in above-mentioned Target cell group
Frequency repetitive rate, and in the cell after row-column transform and above-mentioned Target cell group other cells also only one be greater than above-mentioned first
When the pilot tone repetitive rate of threshold value, using the above-mentioned pilot tone repetitive rate greater than first threshold as the sum of pilot tone repetitive rate of the cell
Sum value；The sum of district pilots repetitive rate after row-column transform sum value is 0.
Above-mentioned area group to be optimized determines subelement 4032, specifically for two corresponding to the sum value that ought compare two-by-two
When the pilot tone repetitive rate of cell is not zero, more each sun value, selects the maximum sum value of numerical value two-by-two, and above-mentioned numerical value is maximum
Area group corresponding to sum value is as above-mentioned area group to be optimized.
In an embodiment of the present invention, pilot tone allocation unit 404 further includes interference strength determination unit 4041 (in figure
Do not mark) and pilot tone distribution subelement 4042 (not marked in figure).
Above-mentioned interference strength determination unit 4041 is specifically used for being directed to each above-mentioned area group to be optimized, and calculating should be to excellent
Change area group in any user to respective base station distance at a distance from all users to above-mentioned base station in the cell to be optimized
Average value the first ratio and the cell to be optimized in above-mentioned user to above-mentioned base station transmitting power and the cell to be optimized
Second ratio of all users to above-mentioned base station transmitting power average value in group；By above-mentioned first ratio and above-mentioned second ratio it
With the interference strength as above-mentioned user to above-mentioned base station.
Above-mentioned pilot tone distributes subelement 4042, is specifically used in the area group to be optimized, according to the area group to be optimized
Corresponding pilot tone vector, the user for being higher than second threshold for interference strength are sequentially allocated different pilot tones；It is lower than for interference strength
The user of above-mentioned second threshold distributes identical pilot tone.
A kind of pilot tone distribution system of multiaerial system provided in an embodiment of the present invention can be repeated according to the pilot tone of cell
Rate determines area group to be optimized, determines user according to the distance of user to base station and transmission power in area group to be optimized
Interference strength to realize the reasonable distribution of pilot tone, it is dirty to reduce pilot tone according to interference strength successively to subscriber segmentation pilot tone
Dye.
The embodiment of the invention also provides a kind of electronic equipment, as shown in figure 5, include processor 501, communication interface 502,
Memory 503 and communication bus 504, wherein processor 501, communication interface 502, memory 503 are complete by communication bus 504
At mutual communication,
Memory 503, for storing computer program；
Processor 501 when for executing the program stored on memory 503, realizes following steps：
Determine the pilot tone vector of each cell in Target cell group, wherein it include element 1 and 0 in above-mentioned pilot tone vector, it is any
Element 1 at position indicates that pilot tone corresponding with the position is occupied in default pilot frequency sequence, and the element 0 at any position indicates
Pilot tone corresponding with the position is unoccupied in default pilot frequency sequence；
The pilot tone repetitive rate between cell two-by-two is calculated according to the pilot tone vector of above-mentioned each cell；
According to above-mentioned pilot tone repetitive rate, it is default to calculate other cells satisfaction first in any cell and above-mentioned Target cell group
The sum of pilot tone repetitive rate of condition sum value is more conform with each sum value of condition two-by-two, will meet the sum value of the second preset condition
Corresponding area group is as area group to be optimized；
For each above-mentioned area group to be optimized, based on any user in the area group to be optimized to respective base station away from
From with transmission power determine above-mentioned user to the interference strength of above-mentioned base station, it is strong according to above-mentioned interference in the area group to be optimized
The size of degree is followed successively by each user in the area group to be optimized and distributes pilot tone.
A kind of electronic equipment provided in an embodiment of the present invention can determine to be optimized small according to the pilot tone repetitive rate of cell
Qu Qun determines the interference strength of user in area group to be optimized according to the distance of user to base station and transmission power, according to
Interference strength is successively to subscriber segmentation pilot tone, to realize the reasonable distribution of pilot tone, reduces pilot pollution.
The communication bus that above-mentioned electronic equipment is mentioned can be Peripheral Component Interconnect standard (Peripheral Component
Interconnect, PCI) bus or expanding the industrial standard structure (Extended Industry Standard
Architecture, EISA) bus etc..The communication bus can be divided into address bus, data/address bus, control bus etc..For just
It is only indicated with a thick line in expression, figure, it is not intended that an only bus or a type of bus.
Communication interface is for the communication between above-mentioned electronic equipment and other equipment.
Memory may include random access memory (Random Access Memory, RAM), also may include non-easy
The property lost memory (Non-Volatile Memory, NVM), for example, at least a magnetic disk storage.Optionally, memory may be used also
To be storage device that at least one is located remotely from aforementioned processor.
Above-mentioned processor can be general processor, including central processing unit (Central Processing Unit,
CPU), network processing unit (Network Processor, NP) etc.；It can also be digital signal processor (Digital Signal
Processing, DSP), it is specific integrated circuit (Application Specific Integrated Circuit, ASIC), existing
It is field programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete
Door or transistor logic, discrete hardware components.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Each embodiment in this specification is all made of relevant mode and describes, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for system,
For electronic equipment embodiment, since it is substantially similar to the method embodiment, so be described relatively simple, related place referring to
The part of embodiment of the method illustrates.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (10)
1. a kind of pilot distribution method of multiaerial system, which is characterized in that the method includes：
Determine the pilot tone vector of each cell in Target cell group, wherein include element 1 and 0, any position in the pilot tone vector
The element 1 at place indicates that pilot tone corresponding with the position is occupied in default pilot frequency sequence, and the element 0 at any position indicates default
Pilot tone corresponding with the position is unoccupied in pilot frequency sequence；
The pilot tone repetitive rate between cell two-by-two is calculated according to the pilot tone vector of each cell；
According to the pilot tone repetitive rate, calculates other cells in any cell and the Target cell group and meet the first preset condition
The sum of pilot tone repetitive rate sum value, be more conform with each sum value of condition two-by-two, the sum value institute that will meet the second preset condition is right
The area group answered is as area group to be optimized；
For each area group to be optimized, distance based on any user in the area group to be optimized to respective base station and
Transmission power determines the user to the interference strength of the base station, according to the interference strength in the area group to be optimized
Size is followed successively by each user in the area group to be optimized and distributes pilot tone.
2. the method according to claim 1, wherein in the determining Target cell group each cell pilot tone vector
Including：
Determine that the pilot tone of each cell distributes priority according to payload size in the Target cell group；
The sequence of priority from big to small is distributed according to the pilot tone, successively determines the pilot tone vector of each cell.
3. the method according to claim 1, wherein described calculate two-by-two according to the pilot tone vector of each cell
Pilot tone repetitive rate between cell includes：
It is repeated in acquisition first community pilot tone vector sum second community pilot tone vector and the number of nonzero element is as molecule, obtained
The sum of nonzero element number and nonzero element number in second community pilot tone vector are used as denominator, institute in first community pilot tone vector
The ratio for stating molecule and the denominator is the pilot tone repetitive rate of the first community Yu the second community, the first community
It is arbitrary cells in each cell with the second community.
4. calculating any cell the method according to claim 1, wherein described according to the pilot tone repetitive rate
Meeting the sum of the pilot tone repetitive rate of the first preset condition sum value with other cells in the Target cell group includes：
When other cells have the pilot tone repetitive rate that at least two are greater than first threshold in any cell and the Target cell group,
Meet the as other cells in the cell and the Target cell group greater than the sum of pilot tone repetitive rate of first threshold for described
The sum of pilot tone repetitive rate of one preset condition sum value；
When any cell and other cells in the Target cell group, only one is greater than the pilot tone repetitive rate of the first threshold,
And also only one is greater than described the to other cells on corresponding position in the cell after row-column transform and the Target cell group
When the pilot tone repetitive rate of one threshold value, using the pilot tone repetitive rate greater than first threshold as the sum of pilot tone repetitive rate of the cell
Sum value；The sum of district pilots repetitive rate after row-column transform sum value is 0.
5. according to the method described in claim 4, it is characterized in that, each sum value for being more conform with condition two-by-two, will meet
Area group corresponding to the sum value of second preset condition includes as area group to be optimized：
When the pilot tone repetitive rate of two cells corresponding to the sum value compared two-by-two is not zero, more each sun value two-by-two, choosing
The maximum sum value of numerical value out, using area group corresponding to the maximum sum value of the numerical value as the area group to be optimized.
6. being based on should the method according to claim 1, wherein described be directed to each area group to be optimized
The distance and transmission power of any user to respective base station in area group to be optimized determine that the user does the base station
Disturbing intensity includes：
For each area group to be optimized, calculate any user in the area group to be optimized to respective base station distance with
All users are to the institute in the first ratio and the cell to be optimized of the average value of the distance of the base station in the cell to be optimized
User is stated to the base station transmitting power and all users in the area group to be optimized to the base station transmitting power average value
Second ratio；
By the sum of first ratio and second ratio as the user to the interference strength of the base station.
7. according to the method described in claim 6, it is characterized in that, described strong according to the interference in the area group to be optimized
The size of degree is followed successively by each user's distribution pilot tone in the area group to be optimized：
In the area group to be optimized, according to the corresponding pilot tone vector of the area group to be optimized, it is higher than the second threshold for interference strength
The user of value is sequentially allocated different pilot tones；
Identical pilot tone is distributed lower than the user of the second threshold for interference strength.
8. a kind of pilot tone distribution system of multiaerial system, which is characterized in that the system comprises：
Pilot tone vector determination unit, for determining the pilot tone vector of each cell in Target cell group, wherein in the pilot tone vector
Including element 1 and 0, the element 1 at any position indicates that pilot tone corresponding with the position is occupied in default pilot frequency sequence, any
Element 0 at position indicates that pilot tone corresponding with the position is unoccupied in default pilot frequency sequence；
Pilot tone repetitive rate computing unit, the pilot tone for being calculated between cell two-by-two according to the pilot tone vector of each cell repeat
Rate；
Area group determination unit to be optimized, for calculating any cell and the Target cell group according to the pilot tone repetitive rate
In other cells meet the sum of the pilot tone repetitive rate sum value of the first preset condition, be more conform with each sum value of condition two-by-two, will
Meet area group corresponding to the sum value of the second preset condition as area group to be optimized；
Pilot tone allocation unit, for being directed to each area group to be optimized, based on any user in the area group to be optimized
Distance and transmission power to respective base station determine the user to the interference strength of the base station, in the area group to be optimized
Each user in the area group to be optimized, which is followed successively by, according to the size of the interference strength distributes pilot tone.
9. system according to claim 8, which is characterized in that the pilot tone allocation unit further includes that interference strength determines list
Member and pilot tone distribute subelement；
The interference strength determination unit is specifically used for being directed to each area group to be optimized, calculates the area group to be optimized
Distance average value with the to be optimized cell in all users to the base station at a distance from of the interior any user to respective base station
The first ratio and the cell to be optimized in the user to the base station transmitting power and the area group to be optimized in own
Second ratio of the user to the base station transmitting power average value；It regard the sum of first ratio and second ratio as institute
User is stated to the interference strength of the base station；
The pilot tone distributes subelement, is specifically used in the area group to be optimized, and according to this, area group to be optimized is corresponding leads
Frequency vector, the user for being higher than second threshold for interference strength are sequentially allocated different pilot tones；It is lower than described second for interference strength
The user of threshold value distributes identical pilot tone.
10. a kind of electronic equipment, which is characterized in that including processor, communication interface, memory and communication bus, wherein described
Processor, the communication interface, the memory complete mutual communication by the communication bus；
The memory, for storing computer program；
The processor when for executing the program stored on memory, realizes method step as claimed in claim 1 to 7
Suddenly.
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| CN109995496A (en) * | 2019-04-12 | 2019-07-09 | 鹰潭泰尔物联网研究中心 | A kind of pilot distribution method of extensive antenna system |
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| EP2924908B1 (en) * | 2014-03-28 | 2019-08-28 | Sony Corporation | Pilot time slot allocation for a MIMO system |
| CN105049098B (en) * | 2015-06-15 | 2018-07-17 | 西安交通大学 | The portion of pilot multiplexing method of pilot pollution is overcome in extensive mimo system |
| KR101674315B1 (en) * | 2015-08-18 | 2016-11-08 | 서울대학교산학협력단 | A method for channel estimation in wireless communicatin systems with a distributed antenna structure |
| CN105827273B (en) * | 2016-03-08 | 2018-10-23 | 上海交通大学 | The extensive mimo system user double antenna Pilot Interference removing method of multiple cell |
| CN108134661A (en) * | 2018-01-30 | 2018-06-08 | 重庆邮电大学 | The pilot distribution method of low complex degree in a kind of extensive mimo system |
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| CN109995496A (en) * | 2019-04-12 | 2019-07-09 | 鹰潭泰尔物联网研究中心 | A kind of pilot distribution method of extensive antenna system |
| CN109995496B (en) * | 2019-04-12 | 2021-09-21 | 鹰潭泰尔物联网研究中心 | Pilot frequency distribution method of large-scale antenna system |
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