CN104507111B - Collaborative communication method and device based on cluster in cellular network - Google Patents
Collaborative communication method and device based on cluster in cellular network Download PDFInfo
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- CN104507111B CN104507111B CN201410830878.8A CN201410830878A CN104507111B CN 104507111 B CN104507111 B CN 104507111B CN 201410830878 A CN201410830878 A CN 201410830878A CN 104507111 B CN104507111 B CN 104507111B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- 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
- H04B7/0452—Multi-user MIMO systems
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Abstract
The present invention provides collaborative communication method and device based on cluster in a kind of cellular network, and this method includes：According to the signal that each base station communicates with all user equipmenies in cellular network, calculate base station two-by-two and form the theoretical maximum traffic rate that a cluster carries out collaboration communication, using all base stations as node, using the weights on theoretical maximum traffic rate side between node, complete graph is constructed；Using maximum figure matching algorithm to obtain in complete graph to complete graph, cluster size is 2 optimal cluster, the optimal dividing that the optimal cluster matches between base station two-by-two；The MIMO communications for coordination between base station two-by-two are carried out according to the optimal dividing.The above method can select optimal cell cluster scheme, strengthen the signal of cluster Intra-cell, reduce the inter-cell interference of cellular network, improve the transmission rate of data.
Description
Technical field
The present invention relates to the communication for coordination side based on cluster in cellular telecommunication art field, more particularly to a kind of cellular network
Method and device.
Background technology
In existing cellular communications networks, for the speed that the number of users and data of the service of improving communicate, employ
Increase the technology such as base station transmitting power, higher-order frequency reuse, cause serious problem of inter-cell interference.With cellular basestation
Increasingly intensive, problem of inter-cell interference even alreadys exceed other noise jamming problems and carried as cellular communication system speed is suppressed
High subject matter.The methods of problem of inter-cell interference can not set up base station number by routine, improve base station transmitting power is come
Overcome, system availability can be caused to reduce, fundamentally limit cellular communication system available subscribers number and data communication rates
Further increase.
The problem of in order to tackle the serious inter-cell interference faced at present, current existing solution method is by network
Multiple base stations be divided into cluster, used in the intra base station of cell cluster and use multiple-input, multiple-output with reference to the obtained information of measurement
The communication standard of (Multiple Input Multiple Output, abbreviation MIMO) strengthens signal, resistance interference.Due to base
The size of back end communications bandwidth is limited between standing, and the exchange of channel information can only be carried out between limited individual base station, each cluster
Intra base station limited amount.Therefore, it is necessary to a kind of base station clustering method, according to channel information, application method, by cell base station
The base station in portion is divided into multiple clusters.Existing method generally use Brute-force search algorithm, greedy algorithm.
Although greedy algorithm can provide the speed of data communication to a certain extent, its effect is limited, with optimal stroke
The effect difference divided is larger.Brute-force search algorithm can obtain theoretic optimal solution, but computation complexity is too high, can consume
The substantial amounts of computing resource of cell base station, it is impossible to the change of adaptive channel state in real time, it is less efficient.
In consideration of it, how to be based on channel information sub-clustering between each base station in cellular networks, and carry out communication for coordination into
To be currently needed for the technical problem solved.
The content of the invention
For in the prior art the defects of, the present invention provide a kind of collaborative communication method in cellular network based on cluster and
Device, optimal cell cluster scheme can be selected, strengthen the signal of cluster Intra-cell, the minizone for reducing cellular network is done
Disturb, improve the transmission rate of data.
In a first aspect, the present invention provides the collaborative communication method based on cluster in a kind of cellular network, including：
S1, according to the signal that each base station communicates with all user equipmenies in cellular network, calculate base station composition one two-by-two
Individual cluster carries out the theoretical maximum traffic rate of collaboration communication, using all base stations as node, with the theoretical maximum traffic rate
The weights on side between node, construct complete graph；
S2, maximum figure matching algorithm is used to the complete graph, obtain the optimal collection that cluster size in the complete graph is 2
Cluster, the optimal dividing that the optimal cluster matches between base station two-by-two；
S3, the multiple-input, multiple-output MIMO carried out according to the optimal dividing that is matched between the base station two-by-two between base station two-by-two are assisted
With communication.
Alternatively, also include after the step S3：
Monitoring channel state variations in real time, repeat step S1 and S2, in real time acquisition match most between current base station two-by-two
Excellent division, when speed in cellular networks is less than predetermined threshold value, matched most according between acquired current base station two-by-two
Excellent division re-starts the multiple-input, multiple-output MIMO communications for coordination between base station two-by-two.
Alternatively, the step S1 includes：
According to the signal that each base station communicates with all user equipmenies in cellular network, channel state matrix is obtained；
According to the channel state matrix, the theoretical maximum for calculating one cluster progress collaboration communication of base station composition two-by-two leads to
Believe speed；
Using all base stations as node, using the weights on theoretical maximum traffic rate side between node, complete graph is constructed.
Alternatively, it is described according to the signal that each base station communicates with all user equipmenies in cellular network, obtain channel shape
State matrix, including：
Characteristic vector in the signal phasor that each base station communicates with all user equipmenies in cellular network carries out letter
The estimation of road state；
All channel status for estimating to obtain are collected, obtain channel state matrix.
Alternatively, the step S2 includes：
Edmond maximum figure matching algorithms are used to the complete graph, it is 2 most to obtain in the complete graph cluster size
Excellent cluster, the optimal dividing that the optimal cluster matches between base station two-by-two.
Second aspect, the present invention provide the communication for coordination device based on cluster in a kind of cellular network, including：
Complete graph constructing module, for according to the signal that each base station communicates with all user equipmenies in cellular network, meter
Calculate base station two-by-two and form the theoretical maximum traffic rate that a cluster carries out collaboration communication, using all base stations as node, with described
The weights on theoretical maximum traffic rate side between node, construct complete graph；
Optimal dividing acquisition module, for using maximum figure matching algorithm to the complete graph, obtain in the complete graph
Cluster size is 2 optimal cluster, the optimal dividing that the optimal cluster matches between base station two-by-two；
Communication for coordination module, for according between the optimal dividing progress matched between the base station two-by-two two-by-two base station
Multiple-input, multiple-output MIMO communications for coordination.
Alternatively, described device also includes：
Self-adapting synergizing communication adjusting module, for monitoring channel state variations in real time, repeat step S1 and S2, is obtained in real time
The optimal dividing matched between current base station two-by-two is taken, when speed in cellular networks is less than predetermined threshold value, according to acquired
Current base station two-by-two between the optimal dividing that matches re-start multiple-input, multiple-output MIMO communications for coordination between base station two-by-two.
Alternatively, the complete graph constructing module, including：
Matrix acquiring unit, for according to the signal that each base station communicates with all user equipmenies in cellular network, obtaining
Channel state matrix；
Computing unit, for according to the channel state matrix, calculating base station two-by-two and forming a cluster and cooperate and lead to
The theoretical maximum traffic rate of letter；
Complete graph structural unit, for using all base stations as node, using the theoretical maximum traffic rate between node
The weights on side, construct complete graph.
Alternatively, the matrix acquiring unit, is specifically used for
Characteristic vector in the signal phasor that each base station communicates with all user equipmenies in cellular network carries out letter
The estimation of road state；
All channel status for estimating to obtain are collected, obtain channel state matrix.
Alternatively, the optimal dividing acquisition module, is specifically used for
Edmond maximum figure matching algorithms are used to the complete graph, it is 2 most to obtain in the complete graph cluster size
Excellent cluster, the optimal dividing that the optimal cluster matches between base station two-by-two.
As shown from the above technical solution, collaborative communication method and device based on cluster in cellular network of the invention, lead to
Cross according to the signal that each base station communicates with all user equipmenies in cellular network, calculate base station two-by-two and form a cluster progress
The theoretical maximum traffic rate of collaboration communication, using all base stations as node, using theoretical maximum traffic rate between node side
Weights, construct complete graph, complete graph use cluster size in maximum figure matching algorithm acquisition complete graph for 2 optimal cluster,
The optimal cluster is the optimal dividing that is matched between base station two-by-two, carried out according to the optimal dividing between base station two-by-two enter it is more
Go out MIMO communications for coordination, thereby, it is possible to select optimal cell cluster scheme, strengthen the signal of cluster Intra-cell, reduce honeybee
The inter-cell interference of nest network, improve the transmission rate of data.This method is applied to the feelings that cluster intra base station quantity is equal to 2
Condition, when all base station numbers are N, the time complexity of this method is 0 (N^3), and efficiency is far above Brute-force search algorithm, and can
To obtain optimal solution.
Brief description of the drawings
Fig. 1 is the flow signal of the collaborative communication method based on cluster in the cellular network that one embodiment of the invention provides
Figure；
Fig. 2 is the flow signal of the collaborative communication method based on cluster in the cellular network that another embodiment of the present invention provides
Figure；
Fig. 3 is the structural representation of the communication for coordination device based on cluster in the cellular network that one embodiment of the invention provides
Figure；
Fig. 4 is the structural representation of the communication for coordination device based on cluster in the cellular network that another embodiment of the present invention provides
Figure；
Fig. 5 is one embodiment of the invention offer using the different total RATESs of collection cluster method cellular network up-link
Schematic diagram.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, clear, complete description is carried out to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only
Only it is part of the embodiment of the present invention, rather than whole embodiments.Based on embodiments of the invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Fig. 1 shows that the flow of the collaborative communication method based on cluster in the cellular network that one embodiment of the invention provides is shown
Be intended to, this method for all base stations in the case of being 2 in cluster scale cluster-dividing method, as shown in Fig. 2 the honeycomb of the present embodiment
The collaborative communication method based on cluster is as described below in network.
S1, according to the signal that each base station communicates with all user equipmenies in cellular network, calculate base station composition one two-by-two
Individual cluster carries out the theoretical maximum traffic rate of collaboration communication, using all base stations as node, with the theoretical maximum traffic rate
The weights on side between node, construct complete graph.
In a particular application, above-mentioned steps S1 may include the step S1a-S1c not shown in figure：
S1a, according to the signal that each base station communicates with all user equipmenies in cellular network, obtain channel state matrix.
Above-mentioned steps S1a may include：
Characteristic vector in the signal phasor that each base station communicates with all user equipmenies in cellular network carries out letter
The estimation of road state；
All channel status for estimating to obtain are collected, obtain channel state matrix.
S1b, according to the channel state matrix, calculate base station two-by-two form a cluster carry out collaboration communication it is theoretical most
Big traffic rate.
It should be noted that in this step S1b, a MIMO traffic model is constructed when calculating, two base stations and two
The MIMO of one 2 × 2 is constituted between user, the signal that other users are sent is regarded as disturbing.
S1c, using all base stations as node, using the weights on theoretical maximum traffic rate side between node, constructed
Full figure.
S2, maximum figure matching algorithm is used to the complete graph, obtain the optimal collection that cluster size in the complete graph is 2
Cluster, the optimal dividing that the optimal cluster matches between base station two-by-two.
In a particular application, for example, above-mentioned steps S2 is preferably：
Edmond maximum figure matching algorithms are used to the complete graph, it is 2 most to obtain in the complete graph cluster size
Excellent cluster, the optimal dividing that the optimal cluster matches between base station two-by-two.
It will be appreciated that the maximum figure matching algorithm of the present embodiment includes many algorithms, the present embodiment is not carried out to it
Limitation, can also use other maximum figure matching algorithms to the complete graph, obtain in the complete graph cluster size as 2 most
Excellent cluster.
S3, the multiple-input, multiple-output MIMO carried out according to the optimal dividing that is matched between the base station two-by-two between base station two-by-two are assisted
With communication.
It will be appreciated that this step S3 be according to be transmitted between optimal dividing intra base station rear end information exchange, adopt
Strengthen signal with the MIMO modes to communicate, offset interference between cluster intra base station.
In a particular application, as shown in Fig. 2 may also include after above-mentioned steps S3：
S4, monitor channel state variations in real time, repeat step S1 and S2, obtain what is matched between current base station two-by-two in real time
Optimal dividing, when speed in cellular networks is less than predetermined threshold value, according to what is matched between acquired current base station two-by-two
Optimal dividing re-starts the multiple-input, multiple-output MIMO communications for coordination between base station two-by-two.
It will be appreciated that the predetermined threshold value is actual conditions (cellular bandwidth, the number of cells according to cellular network
Deng) set.
In a particular application, we have the cellular networks of 24 cells to enter using (, abbreviation 3GPP) channel model to one
The scene of transmitting uplink data of having gone is emulated, and Fig. 5 is shown using different collection cluster method cellular network up-links
Total RATES's schematic diagram, it is assumed that the radius of base station is 2km, there is a user in each cell, from figure 3, it can be seen that this
The described method of invention can obtain the result consistent with Brute-force search algorithm, and the result that the present invention obtains is substantially better than state
Existing dynamic greedy algorithm Dynamic Greedy Method and static clustering method Static Cluster on border
Method (does not consider that channel conditions directly divide to base station).
This method be applied to cluster intra base station quantity be equal to 2 situation, when all base station numbers are N, this method when
Between complexity be 0 (N^3), efficiency is far above Brute-force search algorithm, and can obtain optimal solution.
Collaborative communication method based on cluster in the cellular network of the present embodiment, by according to each base station in cellular network
The signal to be communicated with all user equipmenies, calculate base station two-by-two and form the theoretical maximum communication speed that a cluster carries out collaboration communication
Rate, using all base stations as node, using the weights on theoretical maximum traffic rate side between node, complete graph is constructed, to complete graph
Using maximum figure matching algorithm to obtain in complete graph, cluster size is 2 optimal cluster, and the optimal cluster is between base station two-by-two
The optimal dividing of matching, the multiple-input, multiple-output MIMO communications for coordination between base station two-by-two are carried out according to the optimal dividing, thereby, it is possible to
Optimal cell cluster scheme is selected, strengthens the signal of cluster Intra-cell, reduces the inter-cell interference of cellular network, improves number
According to transmission rate.
Fig. 3 shows that the structure of the communication for coordination device based on cluster in the cellular network that one embodiment of the invention provides is shown
It is intended to, as shown in figure 3, the communication for coordination device based on cluster in the cellular network of the present embodiment, including：Complete graph constructing module
31st, optimal dividing acquisition module 32 and communication for coordination module 33；
Complete graph constructing module 31, for according to the signal that each base station communicates with all user equipmenies in cellular network,
Calculate base station two-by-two and form the theoretical maximum traffic rate that a cluster carries out collaboration communication, using all base stations as node, with institute
The weights on theoretical maximum traffic rate side between node are stated, construct complete graph；
Optimal dividing acquisition module 32, for using maximum figure matching algorithm to the complete graph, obtain the complete graph
Middle cluster size is 2 optimal cluster, the optimal dividing that the optimal cluster matches between base station two-by-two；
Communication for coordination module 33, for according between the optimal dividing progress matched between the base station two-by-two two-by-two base station
Multiple-input, multiple-output MIMO communications for coordination.
It will be appreciated that in the communication for coordination module 33 passed according between optimal dividing intra base station rear end
Defeated information exchanges, and strengthens signal by the way of MIMO communications, offsets interference between cluster intra base station.
In a particular application, as shown in figure 4, the present embodiment described device may also include：
Self-adapting synergizing communicate adjusting module 34, in real time monitor channel state variations, repeat step S1 and S2, in real time
The optimal dividing matched between current base station two-by-two is obtained, when speed in cellular networks is less than predetermined threshold value, according to being obtained
The optimal dividing matched between the current base station two-by-two taken re-starts the multiple-input, multiple-output MIMO communications for coordination between base station two-by-two.
It will be appreciated that the predetermined threshold value is actual conditions (cellular bandwidth, the number of cells according to cellular network
Deng) set.
In a particular application, complete graph constructing module 31 described in the present embodiment, it may include not shown in figure：
Matrix acquiring unit, for according to the signal that each base station communicates with all user equipmenies in cellular network, obtaining
Channel state matrix；
Computing unit, for according to the channel state matrix, calculating base station two-by-two and forming a cluster and cooperate and lead to
The theoretical maximum traffic rate of letter；
Complete graph structural unit, for using all base stations as node, using the theoretical maximum traffic rate between node
The weights on side, construct complete graph.
Further, in a particular application, the matrix acquiring unit, can be specifically used for
Characteristic vector in the signal phasor that each base station communicates with all user equipmenies in cellular network carries out letter
The estimation of road state；
All channel status for estimating to obtain are collected, obtain channel state matrix.
In a particular application, the optimal dividing acquisition module 32, can be specifically used for
Edmond maximum figure matching algorithms are used to the complete graph, it is 2 most to obtain in the complete graph cluster size
Excellent cluster, the optimal dividing that the optimal cluster matches between base station two-by-two.
It will be appreciated that the maximum figure matching algorithm of the present embodiment includes many algorithms, the present embodiment is not carried out to it
Limitation, can also use other maximum figure matching algorithms to the complete graph, obtain in the complete graph cluster size as 2 most
Excellent cluster.
Communication for coordination device based on cluster in the cellular network of the present embodiment, cell cluster scheme that can be optimal, increase
The signal of strong cluster Intra-cell, the inter-cell interference of cellular network is reduced, improve the transmission rate of data.
Communication for coordination device based on cluster in the cellular network of the present embodiment, it can be used for performing side shown in earlier figures 1
The technical scheme of method embodiment, its implementing principle and technical effect is similar, and here is omitted.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to
The related hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journey
Sequence upon execution, execution the step of including above-mentioned each method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or
Person's CD etc. is various can be with the medium of store program codes.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from the claims in the present invention and limited
Fixed scope.
Claims (6)
- A kind of 1. collaborative communication method based on cluster in cellular network, it is characterised in that including：S1, the characteristic vector in the signal phasor that each base station communicates with all user equipmenies in cellular network carry out channel The estimation of state；All channel status for estimating to obtain are collected, obtain channel state matrix；According to the channel status Matrix, calculate base station two-by-two and form the theoretical maximum traffic rate that a cluster carries out collaboration communication；Using all base stations as node, Using the weights on theoretical maximum traffic rate side between node, complete graph is constructed；S2, maximum figure matching algorithm is used to the complete graph, obtains the optimal cluster that cluster size in the complete graph is 2, The optimal dividing that the optimal cluster matches between base station two-by-two；S3, the multiple-input, multiple-output MIMO collaborations carried out according to the optimal dividing matched between the base station two-by-two between base station two-by-two are logical Letter.
- 2. according to the method for claim 1, it is characterised in that also include after the step S3：Monitoring channel state variations in real time, repeat step S1 and S2, optimal stroke matched between current base station two-by-two are obtained in real time Point, when speed in cellular networks is less than predetermined threshold value, according to optimal stroke matched between acquired current base station two-by-two Point re-start the multiple-input, multiple-output MIMO communications for coordination between base station two-by-two.
- 3. according to the method for claim 1, it is characterised in that the step S2 includes：Edmond maximum figure matching algorithms are used to the complete graph, obtain the optimal collection that cluster size in the complete graph is 2 Cluster, the optimal dividing that the optimal cluster matches between base station two-by-two.
- A kind of 4. communication for coordination device based on cluster in cellular network, it is characterised in that including：Complete graph constructing module, for according in the signal phasor that each base station communicates with all user equipmenies in cellular network Characteristic vector carries out the estimation of channel status；All channel status for estimating to obtain are collected, obtain channel state matrix； According to the channel state matrix, calculate base station two-by-two and form the theoretical maximum traffic rate that a cluster carries out collaboration communication； Using all base stations as node, using the weights on theoretical maximum traffic rate side between node, complete graph is constructed；Optimal dividing acquisition module, for using maximum figure matching algorithm to the complete graph, obtain cluster in the complete graph Size is 2 optimal cluster, the optimal dividing that the optimal cluster matches between base station two-by-two；Communication for coordination module, for carried out according to the optimal dividing that is matched between the base station two-by-two between base station two-by-two enter Have more MIMO communications for coordination.
- 5. device according to claim 4, it is characterised in that also include：Self-adapting synergizing communication adjusting module, for monitoring channel state variations in real time, repeat step S1 and S2, obtaining in real time ought The optimal dividing matched between preceding base station two-by-two, when speed in cellular networks is less than predetermined threshold value, work as according to acquired The optimal dividing matched between preceding base station two-by-two re-starts the multiple-input, multiple-output MIMO communications for coordination between base station two-by-two.
- 6. device according to claim 4, it is characterised in that the optimal dividing acquisition module, be specifically used forEdmond maximum figure matching algorithms are used to the complete graph, obtain the optimal collection that cluster size in the complete graph is 2 Cluster, the optimal dividing that the optimal cluster matches between base station two-by-two.
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| WO2011097928A1 (en) * | 2010-02-11 | 2011-08-18 | 华为技术有限公司 | Method, and corresponding device for clustering and resource distribution during base station cooperation |
| CN103747531A (en) * | 2013-10-08 | 2014-04-23 | 北京科技大学 | Cooperative clustering transmission method |
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| WO2011097928A1 (en) * | 2010-02-11 | 2011-08-18 | 华为技术有限公司 | Method, and corresponding device for clustering and resource distribution during base station cooperation |
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