CN110337093A - The resource allocation device of D2D user in cellular network - Google Patents
The resource allocation device of D2D user in cellular network Download PDFInfo
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- CN110337093A CN110337093A CN201910553879.5A CN201910553879A CN110337093A CN 110337093 A CN110337093 A CN 110337093A CN 201910553879 A CN201910553879 A CN 201910553879A CN 110337093 A CN110337093 A CN 110337093A
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
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- 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
- H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
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Abstract
The resource allocation device of D2D user in a kind of cellular network, described device includes: computing unit, suitable for calculating the interference distance matrix between D2D user equipment and cellular subscriber device；Mode selecting unit, suitable for determining the D2D user equipment used communication pattern on uplink based on the interference distance matrix and user equipment communication constraint condition between the D2D user equipment being calculated and cellular subscriber device.Above-mentioned scheme can select the communication pattern of reasonable uplink for D2D user equipment, to reduce the interference between D2D user equipment and cellular subscriber device, improve communication quality.
Description
Technical field
The invention belongs to fields of communication technology, more particularly to the resource allocation device of D2D user in cellular network a kind of.
Background technique
With the continuous development of mobile communication, radio spectrum resources day is becoming tight, therefore, higher frequency spectrum and energy efficiency
The research of completely new communication mode is extremely urgent.
The authorization judgement of cellular system is used to carry out the communication of point-to-point under the control of D2D technology permission non-cellular systems,
It is effective to improve system spectrum utilization rate, while also there is the transmission power for reducing terminal, therefore D2D is logical as new generation of wireless
Believe the hot spot of area research.
In the D2D communication under cellular network, unreasonable model selection and channel assignment scheme can introduce interference, seriously
When cannot not only embody the advantage of the D2D communication technology, but also will lead to phone user's transmission rate decline.
Summary of the invention
Present invention solves the technical problem that being how to select the communication pattern of uplink for D2D user equipment, to reduce
Interference between D2D user equipment and cellular subscriber device improves communication quality.
In order to achieve the above object, the present invention provides the resource allocation device of D2D user in cellular network a kind of, the dress
It sets and includes:
Computing unit, suitable for calculating the interference distance matrix between D2D user equipment and cellular subscriber device；
Mode selecting unit, suitable for based on the interference between the D2D user equipment being calculated and cellular subscriber device away from
From matrix and user equipment communication constraint condition, communication pattern used by determining the D2D user equipment on uplink.
Optionally, the interference distance between the computing unit D2D user equipment being calculated and cellular subscriber device
Matrix, including D2D user equipment to the interference distance matrix and cellular subscriber device of cellular subscriber device to D2D user equipment
Interference distance matrix.
Optionally, the mode selecting unit, suitable for based on the D2D user equipment that is calculated and cellular subscriber device it
Between interference distance matrix and signal-to-noise ratio interference threshold, calculate each D2D user equipment on uplink using multiplexing
The power constraints respectively met when communication pattern；When the transmission power for determining the D2D user equipment meets the power
When constraint condition, then multiplexed communications mode is distributed on uplink for the D2D user equipment；When determining the D2D user
When the transmission power of equipment meets the power constraints, then distributed on uplink for the D2D user equipment dedicated
Communication pattern.
Optionally, the power constraints respectively met using the D2D user equipment of multiplexed communications mode are as follows:
Wherein, PD(m) the transmission power of m-th of D2D user equipment is indicated,Indicate m-th of D2D user equipment
Minimum sends the transmission power row vector in power matrix, i.e., minimum to send m row all elements in power matrix, PDMin table
Show that D2D user equipment allows minimum transmission power,Indicate that m-th of D2D user equipment maximum is sent in power matrix
Performance number, i.e., maximum m-th of the element sent in power matrix, PDMax indicates that D2D user equipment allows maximum transmission power.
Optionally, described device further include:
Power distributing unit, suitable for being each based on the power constraints that D2D user equipment respectively meets under multiplexer mode
A D2D user equipment distributes corresponding transmission power.
Optionally, the power distributing unit, suitable for based on the power that D2D user equipment respectively meets under multiplexer mode about
Beam condition generates the harmony data base including multiple harmony vectors；Harmony vector in the harmony data base is carried out global
Adaptive harmony chess game optimization, obtains so that the maximum best harmony vector of throughput of system；Using identified best harmony
Vector carries out power distribution to each D2D user equipment using multiplexer mode.
Optionally, the power distributing unit is suitable for executing primary and sonar surveillance system using global adaptive harmonic search algorithm
Suo Youhua obtains the best harmony vector when previous iteration returns；It will be when each in the best harmony vector that previous iteration returns
Position sequence the corresponding maximum transfer speed of harmony respectively with last iteration return best harmony vector in corresponding positions sequence and
The corresponding maximum transfer speed of sound is compared；It is described when corresponding positions sequence in the best harmony vector of previous iteration return when determining
The corresponding maximum transfer speed of harmony be greater than the harmony correspondence for correspond to position sequence in the best harmony vector that last iteration returns
Maximum transfer speed when, using when previous iteration return best harmony vector in corresponding positions sequence harmony replace described upper one
The harmony for correspond to position sequence in the best harmony vector that secondary iteration returns, obtain the best harmony finally returned when previous iteration to
Amount；Next iteration is executed, until the number of iterations reaches preset frequency threshold value, is obtained so that throughput of system is maximum best
Harmony vector.
Optionally, the power distributing unit, suitable for the maximum transfer speed is calculated using following formula:
Wherein, maxR indicates the maximum transfer speed, μm,nIndicate that i.e. multiplexer mode value is 1, specially with frequency selective factor B
It is 0, P with mode valueD(m) transmission power when m-th of D2D user equipment multiplexing cellular subscriber device uplink, d are indicatedD
(m) m-th of D2D user receiving end is indicated at a distance from transmitting terminal, k indicates path loss decay factor, and α indicates path loss damped expoential,
ID(m) co-channel interference that m-th of D2D user receiving end is subject to, N are indicated0White Gaussian noise present in expression system, PC(n) table
Show the transmission power of n-th of cellular subscriber device, dD(n) distance of n-th of phone user to base station, I are indicatedC(n) n-th is indicated
The co-channel interference that a phone user receiving end is subject to.
Compared with prior art, the invention has the benefit that
Above-mentioned scheme by calculating the interference distance matrix between D2D user equipment and cellular subscriber device, and is based on
Interference distance matrix and user equipment communication constraint condition between the D2D user equipment being calculated and cellular subscriber device,
Communication pattern used by determining the D2D user equipment on uplink, can reduce D2D user equipment and phone user
Interference between equipment improves communication quality.
Further, it based on the power constraints that D2D user equipment respectively meets under multiplexer mode, is used for each D2D
Family equipment distributes corresponding transmission power, and all since the power constraints that each D2D user equipment respectively meets are different
D2D user equipment compared using unified power constraints, the speed of power distribution can be improved when carrying out power distribution
Degree.
Further, a harmony chess game optimization is executed using global adaptive harmonic search algorithm, obtains changing when previous
The best harmony vector that generation returns；It will be when the corresponding maximum of harmony of each sequence in the best harmony vector that previous iteration returns
The corresponding maximum transfer speed of the harmony of corresponding positions sequence in the best harmony vector that transmission speed is returned with last iteration respectively
It is compared；When the corresponding maximum transmitted of harmony for determining corresponding positions sequence in the best harmony vector returned when previous iteration
When speed is greater than the harmony corresponding maximum transfer speed for correspond to position sequence in the best harmony vector that last iteration returns, use
When the best harmony that the harmony of corresponding positions sequence in the best harmony vector that previous iteration returns replaces the last iteration to return
The harmony that position sequence is corresponded in vector obtains the final best harmony vector when previous iteration returns；Next iteration is executed, directly
Reach preset frequency threshold value to the number of iterations, obtains so that the maximum best harmony vector of throughput of system, finds the overall situation most
Excellent power distribution distribution, to realize that overall system throughput is maximum while guaranteeing user communication quality.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for
For those of ordinary skill in the art, without any creative labor, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is the flow diagram of the resource allocation methods of D2D user in one of embodiment of the present invention cellular network；
Fig. 2 is the schematic diagram comprising the independent hybrid cellular cell system including center base station in the embodiment of the present invention；
Fig. 3 is the process signal of the resource allocation methods of D2D user in another cellular network in the embodiment of the present invention
Figure；
The resource allocation methods that Fig. 4 shows D2D user in a kind of cellular network corresponding are always gulped down comprising system D2D user
The analogous diagram that the amount of spitting, system D2D user access rate and system D2D user equipment always interfere；
Fig. 5 shows method and existing simulated annealing and basic harmonic search algorithm in the embodiment of the present invention
Phone user's total throughout and system D2D user's total throughout schematic diagram；
The structure that Fig. 6 shows the resource allocation device of D2D user in one of embodiment of the present invention cellular network is shown
It is intended to.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.Related directionality instruction in the embodiment of the present invention (such as upper and lower, left and right,
It is forward and backward etc.) it is only used for the relative positional relationship explained under a certain particular pose (as shown in the picture) between each component, movement feelings
Condition etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
As stated in the background art, in the D2D communication under existing cellular network, unreasonable model selection and channel point
Interference can be introduced with scheme, the advantage of the D2D communication technology cannot be not only embodied when serious, but also will lead to phone user's transmission
Rate decline.
Technical solution of the present invention passes through the interference distance matrix calculated between D2D user equipment and cellular subscriber device,
And based on the interference distance matrix and user equipment communication constraint between the D2D user equipment being calculated and cellular subscriber device
Condition, communication pattern used by determining the D2D user equipment on uplink, can reduce D2D user equipment and bee
Interference between nest user equipment improves communication quality.
It is understandable to enable above-mentioned purpose of the invention, feature and beneficial effect to become apparent, with reference to the accompanying drawing to this
The specific embodiment of invention is described in detail.
Fig. 1 is the flow diagram of the resource allocation methods of D2D user in one of embodiment of the present invention cellular network.
Referring to Fig. 1, the resource allocation methods of D2D user in a kind of cellular network can specifically include following step:
Step S101: the interference distance matrix between D2D user equipment and cellular subscriber device is calculated；
Step S102: based between the D2D user equipment being calculated and cellular subscriber device interference distance matrix and
User equipment communication constraint condition, communication pattern used by determining the D2D user equipment on uplink.
Above-mentioned scheme by calculating the interference distance matrix between D2D user equipment and cellular subscriber device, and is based on
Interference distance matrix and user equipment communication constraint condition between the D2D user equipment being calculated and cellular subscriber device,
Communication pattern used by determining the D2D user equipment on uplink, can reduce D2D user equipment and phone user
Interference between equipment improves communication quality.
It is done below in conjunction with resource allocation methods of the Fig. 2 to Fig. 5 to D2D user in the cellular network in the embodiment of the present invention
Further details of explanation.
Firstly, in order to make it easy to understand, the independent hybrid cellular cell system in the embodiment of the present invention is introduced first.
Referring to fig. 2, the system in the embodiment of the present invention is to include the independent hybrid cellular cell system including center base station.Wherein, often
It is connect in a independent hybrid cellular cell there are two kinds of users, i.e. cellular subscriber device Cue and including D2D transmitting terminal DueT and D2D
The D2D communication of receiving end DueR is to Due, and cellular subscriber device Cue and D2D communication are evenly distributed in the cell Due.
To Due, there are two kinds of operating modes of multiplexer mode and dedicated mode for D2D communication；If selecting multiplexer mode, D2D is communicated to Due
The uplink resource of cellular system will be shared with the cellular subscriber device Cue chosen；If selecting dedicated mode, D2D
It communicates and will use idle cellular system link resource to Due.How to select communication pattern specific Due about D2D communication
Referring to fig. 2.
Fig. 3 is the process signal of the resource allocation methods of D2D user in another cellular network in the embodiment of the present invention
Figure.Referring to Fig. 3, the resource allocation methods of D2D user in a kind of cellular network can specifically include following step:
Step S301: the interference distance matrix between D2D user equipment and cellular subscriber device is calculated.
In specific implementation, for the communication quality of cellular subscriber device Cue in guarantee system, its interference threshold is arranged
For Imax, and in order to guarantee D2D communication to the communication quality of Due, D2D transmitting terminal DueT maximum sends power and uses
PDMax, minimum send power PDMin indicates that D2D communication is set as the minimum value of the Signal Interference and Noise Ratio of DueThen the interference distance matrix of D2D transmitting terminal to center of housing estate base station BS can indicate are as follows:
D(C)=(d1 d2 ... dM)T (1)
Wherein, d is indicatedmM-th of D2D transmitting terminal is multiplexed phone user's uplink to the distance of base station, i.e. m-th of D2D user
To phone user's interference distance when link, M indicates the total quantity of D2D transmitting terminal.
When D2D user is multiplexed the channel of phone user, in the uplink, the receiving end D2D and phone user are apart from square
Battle array are as follows:
Wherein, dm,nM-th of D2D receiving end DueR (m) is indicated to the distance of n-th of phone user Cue (n), i.e. D2D is multiple
With phone user under mode to the interference distance of the receiving end D2D.
Optionally, the interference distance matrix between the D2D user equipment and cellular subscriber device, including D2D user set
Interference distance matrix of the standby interference distance matrix and cellular subscriber device to cellular subscriber device to D2D user equipment.
Step S302: based between the D2D user equipment being calculated and cellular subscriber device interference distance matrix and
Signal-to-noise ratio interference threshold calculates when each D2D user equipment uses multiplexed communications mode on uplink and respectively meets
Power constraints.
Under multiplexer mode, in order to guarantee the normal communication of the Due, the Signal Interference and Noise Ratio one of Due receiving end DueR (m)
As need to meet following condition:
Wherein, SINRD(m) it indicates Signal Interference and Noise Ratio when m-th of Due multiplexing Cue uplink, indicates PD(m) table
Show transmission power when m-th of Due multiplexing Cue uplink, k is path loss decay factor, and α is path loss damped expoential, N0It is to be
White Gaussian noise present in system,Indicate the transmission power of Cue,When indicating m-th of Due multiplexing Cue uplink
Signal Interference and Noise Ratio minimum value, i.e. Signal Interference and Noise Ratio thresholding.
M-th of Due, which is multiplexed n-th of Cue resource, must satisfy following relational expression to the interference that base station generates:
In summary it can obtain, in multiplexer mode, each D2D transmitting terminal DueT uses multiplexed communications mould on uplink
The power constraints respectively met when formula:
Wherein, PD(m) the transmission power of m-th of D2D user equipment is indicated,Indicate m-th of D2D user equipment
Minimum sends the transmission power row vector in power matrix, i.e., minimum to send m row all elements in power matrix, PDMin table
Show that D2D user equipment allows minimum transmission power,Indicate that m-th of D2D user equipment maximum is sent in power matrix
Performance number, i.e., maximum m-th of the element sent in power matrix, PDMax indicates that D2D user equipment allows maximum transmission power.
It is to be herein pointed out the transmission power of the D2D user equipment meets the power constraints of itself, as
Respectively arranged one corresponding power allowed band of transmission power of each D2D transmitting terminal DueT is different from existing all
The power allowed band that D2D user equipment is all satisfied.It follows that the function that the transmission power of each D2D user equipment is met
Rate allowed band is less than the power allowed band that all D2D user equipmenies are all satisfied.
Step S303: judge that the transmission power of the D2D user equipment meets the power constraints of itself；When judgement is tied
When fruit is no, step S204 can be executed；Conversely, can then execute step S205.
Step S304: private communication mode is distributed on uplink for the D2D user equipment.
In specific implementation, when the transmission power for determining the D2D user equipment meets the power constraints, then for
The D2D user equipment distributes private communication mode on uplink, and it is P that D2D transmitting terminal, which is sent power,D max。
Step S305: multiplexed communications mode is distributed on uplink for the D2D user equipment.
It is then the D2D user when the transmission power for determining the D2D user equipment meets the power constraints
Equipment distributes multiplexed communications mode on uplink.
In specific implementation, the resource allocation methods of D2D user can further include in the cellular network:
Step S306: it based on the power constraints that D2D user equipment respectively meets under multiplexer mode, is used for each D2D
Family equipment distributes corresponding transmission power.
In an embodiment of the present invention, based on the power constraints that D2D user equipment respectively meets under multiplexer mode, it is
Each D2D user equipment distributes corresponding transmission power, using global adaptive harmonic search algorithm, distributes optimal one group
Power is sent, to realize overall system throughput maximum.Specifically, when distributing optimal one group of transmission power, it can
To be primarily based on the power constraints that D2D user equipment respectively meets under multiplexer mode, generating includes multiple harmony vectors
Harmony data base, and global adaptive harmony chess game optimization is carried out to the harmony vector in the harmony data base, obtain so that
The maximum best harmony vector of throughput of system, then using identified best harmony vector to each institute using multiplexer mode
It states D2D user equipment and carries out power distribution.
Firstly, generating includes multiple harmony based on the power constraints that D2D user equipment respectively meets under multiplexer mode
The harmony data base of vector.Wherein, it is made of in harmony data base HMS harmony vector, harmony vector is expressed as Xi={ xi
(1),xi(2),...,xi, and x (M) }i(m) should meet:
Wherein, xi(m) harmony vector X is indicatediIn i-th of harmony, rand (1) indicate, xL(m) harmony vector X is indicatedi
In minimum harmony, xH(m) harmony vector X is indicatediIn maximum harmony.
So, the harmony data base HM including each harmony vector of HMS can be indicated are as follows:
HM={ X1,X2,...,XHMS}T (7)
Global adaptive and sonar surveillance system is carried out when generating harmony data base, then to the harmony vector in the harmony data base
Suo Youhua is obtained so that the global adaptive harmony search of the harmony vector progress of the maximum best harmony vector of throughput of system is excellent
Change, obtain so that can specifically include when the maximum best harmony vector of throughput of system:
Step 1: setting initial parameter.
In specific implementation, the parameter of setting includes harmony data base size HMS, learning parameter LP, the number of iterations TmaxWith
Global adaptive harmony searches for objective function F (Xi).In an embodiment of the present invention, the global adaptive harmony searches for target
Function F (Xi) are as follows:
Wherein, maxR indicates the maximum transfer speed, μm,nIndicate that i.e. multiplexer mode value is 1, specially with frequency selective factor B
It is 0, P with mode valueD(m) transmission power when m-th of D2D user equipment multiplexing cellular subscriber device uplink, d are indicatedD
(m) m-th of D2D user receiving end is indicated at a distance from transmitting terminal, k indicates path loss decay factor, and α indicates path loss damped expoential,
ID(m) co-channel interference that m-th of D2D user receiving end is subject to, N are indicated0White Gaussian noise present in expression system, PC(n) table
Show the transmission power of n-th of cellular subscriber device, dD(n) distance of n-th of phone user to base station, I are indicatedC(n) n-th is indicated
The co-channel interference that a phone user receiving end is subject to.
Step 2: generating the maximum value and minimum value BW of the fine tuning of auto-adaptive parameter sound vector elementmax, BWmin, HMCRm and
PARm.Wherein, HMCRm and PARm respectively indicates harmony data base probability (HMCR, harmony memory
Consideration rate) and tone fine tuning probability (PAR, pitch adjustment rate) Gaussian distributed under
Mean value, standard deviation are respectively 0.01 and 0.05, and HMCR ∈ [0.9,1], PAR ∈ [0,1]；
Step 3: initialization harmony data base HM sets learning parameter T=1, lp=1.
Step 4: generating HMCR, PAR, BW, PAR and BW；
Step 5: executing primary global adaptive harmony chess game optimization, the harmony vector after being optimized；
Step 6: ifHarmony data base is updated, thenAnd it records
Under HMCR and PAR at this time.
In specific implementation, the objective function during harmony receipts rope is when being greater than minimum value in harmony data base
Just by current search to harmony update into harmony data base, otherwise, then continue searching.
Step 7: if lp=LP, HMCRm and PARm being recalculated according to record HMCR, PAR, and lp=1 is set；Otherwise
Lp=lp+1；And execute step 8.
Step 8: judging whether current iteration number is greater than preset generation number Tmax；When the judgment result is no, it can hold
Row 9；Conversely, can then execute step 10.
Step 9: setting T=T+1, and restart to execute from step 4.
Step 10: end operation returns to best harmony vector xB。
The resource allocation methods that Fig. 4 shows D2D user in a kind of cellular network corresponding are always gulped down comprising system D2D user
The analogous diagram that the amount of spitting, system D2D user access rate and system D2D user equipment always interfere.Using in the embodiment of the present invention
After the above method completes model selection and channel distribution, select the D2D user of multiplexer mode with maximum constrained powerIt sends, selects the D2D user of dedicated mode with transmission function maximum allowable in cellular network
Rate PDMax communication.The communication plan that selection multiplexing and dedicated mode combine, handling capacity are higher than complete lower than complete dedicated mode
The total throughout of multiplexer mode, basic reason are that multiplexer mode introduces co-channel interference, and multiplexing interference completely is higher than hybrid guided mode
Formula, and it will cause frequency spectrum wastes for dedicated mode completely.Greedy strategy interferes the smallest letter from co-channel interference minimum, selection
Channel distribution is completed in road, then is judged whether to meet work of the communication quality conditions to determine D2D user by mode selection algorithm
Mode can effectively improve D2D user's multiplexer mode access rate, fully demonstrate the technical advantage of D2D communication.
Fig. 5 shows method and existing simulated annealing and basic harmonic search algorithm in the embodiment of the present invention
Phone user's total throughout and system D2D user's total throughout schematic diagram.Using the above-mentioned side in the embodiment of the present invention
After method completes model selection and channel distribution, in order to continue on the basis of improving system interference and energy saving efficiency, function is proposed
The Poewr control method of rate control algolithm, the global adaptive harmonic search algorithm (SGHS) of combination herein is calculated compared with simulated annealing
Method and basic harmonic search algorithm can effectively improve the total throughout of system, more fully embodiment D2D communication plan
Advantage.
The resource allocation methods of D2D user are described in detail in the above-mentioned cellular network in the embodiment of the present invention,
The above-mentioned corresponding device of method will be introduced below.
The structure that Fig. 6 shows the resource allocation device of D2D user in one of embodiment of the present invention cellular network is shown
It is intended to.Referring to Fig. 6, the resource allocation device 60 of D2D user may include computing unit 601 and mode choosing in a kind of cellular network
Select unit 602, in which:
The computing unit 601, suitable for calculating the interference distance matrix between D2D user equipment and cellular subscriber device；
Wherein, the interference distance matrix between D2D user equipment and cellular subscriber device, including D2D user equipment set phone user
Interference distance matrix of the standby interference distance matrix and cellular subscriber device to D2D user equipment.
The mode selecting unit 602, suitable for based between the D2D user equipment being calculated and cellular subscriber device
Interference distance matrix and user equipment communication constraint condition, it is logical used by determining the D2D user equipment on uplink
Letter mode.
In an embodiment of the present invention, the mode selecting unit 602, suitable for based on the D2D user equipment being calculated
Interference distance matrix and signal-to-noise ratio interference threshold between cellular subscriber device calculate each D2D user equipment upper
The power constraints respectively met when using multiplexed communications mode on line link；When the transmission for determining the D2D user equipment
When power meets the power constraints, then multiplexed communications mode is distributed on uplink for the D2D user equipment；When
It is then the D2D user equipment in uplink when determining that the transmission power of the D2D user equipment meets the power constraints
Chain road distribution private communication mode.Wherein, the power constraint item respectively met using the D2D user equipment of multiplexed communications mode
Part are as follows:
Wherein, PD(m) m is indicated
The transmission power of a D2D user equipment,Indicate that m-th of D2D user equipment minimum sends the transmission function in power matrix
Rate row vector, i.e., it is minimum to send m row all elements in power matrix, PDMin indicates that D2D user equipment allows minimum transmission function
Rate,Indicate that m-th of D2D user equipment maximum sends the performance number in power matrix, i.e., it is maximum to send in power matrix
M-th of element, PDMax indicates that D2D user equipment allows maximum transmission power.
In an embodiment of the present invention, described device 60 further includes power distributing unit 603, in which:
The power distributing unit 603, suitable for the power constraint item respectively met based on D2D user equipment under multiplexer mode
Part distributes corresponding transmission power for each D2D user equipment.
In an embodiment of the present invention, the power distributing unit 603 is suitable for based on D2D user equipment under multiplexer mode
The power constraints respectively met generate the harmony data base including multiple harmony vectors；To in the harmony data base
Harmony vector carries out global adaptive harmony chess game optimization, obtains so that the maximum best harmony vector of throughput of system；Using
Identified best harmony vector carries out power distribution to each D2D user equipment using multiplexer mode.
In an alternative embodiment of the invention, the power distributing unit 603 is suitable for calculating using global adaptive harmony search
Method executes a harmony chess game optimization, obtains the best harmony vector when previous iteration returns；It will be returned most when previous iteration
In good harmony vector the corresponding maximum transfer speed of harmony of each sequence respectively with last iteration return best harmony to
The corresponding maximum transfer speed of the harmony of corresponding positions sequence is compared in amount；When determine it is described when return best of previous iteration and
The corresponding maximum transfer speed of the harmony of corresponding positions sequence is greater than right in the best harmony vector that last iteration returns in sound vector
When the corresponding maximum transfer speed of the harmony of Ying Weixu, using when corresponding positions sequence in the best harmony vector that previous iteration returns
The harmony that position sequence is corresponded in the best harmony vector that harmony replaces the last iteration to return, obtains when previous iteration return
Final best harmony vector；Next iteration is executed, until the number of iterations reaches preset frequency threshold value, is obtained so that system
The maximum best harmony vector of handling capacity.
In still another embodiment of the process, the power distributing unit 603, suitable for institute is calculated using following formula
State maximum transfer speed:
Wherein, maxR indicates the maximum transfer speed, μm,nIndicate that i.e. multiplexer mode value is 1, specially with frequency selective factor B
It is 0, P with mode valueD(m) transmission power when m-th of D2D user equipment multiplexing cellular subscriber device uplink, d are indicatedD
(m) m-th of D2D user receiving end is indicated at a distance from transmitting terminal, k indicates path loss decay factor, and α indicates path loss damped expoential,
ID(m) co-channel interference that m-th of D2D user receiving end is subject to, N are indicated0White Gaussian noise present in expression system, PC(n) table
Show the transmission power of n-th of cellular subscriber device, dD(n) distance of n-th of phone user to base station, I are indicatedC(n) n-th is indicated
The co-channel interference that a phone user receiving end is subject to.
The embodiment of the invention also provides a kind of computer readable storage mediums, are stored thereon with computer instruction, described
The step of resource allocation methods of D2D user in the cellular network are executed when computer instruction is run.Wherein, the honeycomb
The resource allocation methods of D2D user refer to being discussed in detail for preceding sections in network, repeat no more.
The embodiment of the invention also provides a kind of terminals, which is characterized in that including memory and processor, the memory
On store the computer instruction that can be run on the processor, the processor executes when running the computer instruction
In the cellular network the step of resource allocation methods of D2D user.Wherein, in the cellular network D2D user resource
Distribution method refers to being discussed in detail for preceding sections, repeats no more.
Using the above scheme in the embodiment of the present invention, by calculating between D2D user equipment and cellular subscriber device
Interference distance matrix, and based on the interference distance matrix and use between the D2D user equipment being calculated and cellular subscriber device
Family equipment communication constraint condition, communication pattern used by determining the D2D user equipment on uplink, can reduce
Interference between D2D user equipment and cellular subscriber device improves communication quality.
Further, it based on the power constraints that D2D user equipment respectively meets under multiplexer mode, is used for each D2D
Family equipment distributes corresponding transmission power, and all since the power constraints that each D2D user equipment respectively meets are different
D2D user equipment compared using unified power constraints, the speed of power distribution can be improved when carrying out power distribution
Degree.
Further, a harmony chess game optimization is executed using global adaptive harmonic search algorithm, obtains changing when previous
The best harmony vector that generation returns；It will be when the corresponding maximum of harmony of each sequence in the best harmony vector that previous iteration returns
The corresponding maximum transfer speed of the harmony of corresponding positions sequence in the best harmony vector that transmission speed is returned with last iteration respectively
It is compared；When the corresponding maximum transmitted of harmony for determining corresponding positions sequence in the best harmony vector returned when previous iteration
When speed is greater than the harmony corresponding maximum transfer speed for correspond to position sequence in the best harmony vector that last iteration returns, use
When the best harmony that the harmony of corresponding positions sequence in the best harmony vector that previous iteration returns replaces the last iteration to return
The harmony that position sequence is corresponded in vector obtains the final best harmony vector when previous iteration returns；Next iteration is executed, directly
Reach preset frequency threshold value to the number of iterations, obtains so that the maximum best harmony vector of throughput of system, finds the overall situation most
Excellent power distribution distribution, to realize that overall system throughput is maximum while guaranteeing user communication quality.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, the present invention
Claimed range is delineated by the appended claims, the specification and equivalents thereof from the appended claims.
Claims (8)
1. the resource allocation device of D2D user in a kind of cellular network characterized by comprising
Computing unit, suitable for calculating the interference distance matrix between D2D user equipment and cellular subscriber device；
Mode selecting unit, suitable for based on the interference distance square between the D2D user equipment being calculated and cellular subscriber device
Battle array and user equipment communication constraint condition, communication pattern used by determining the D2D user equipment on uplink.
2. the resource allocation device of D2D user in cellular network according to claim 1, which is characterized in that the calculating
Interference distance matrix between the unit D2D user equipment being calculated and cellular subscriber device, including D2D user equipment is to bee
Interference distance matrix of the interference distance matrix and cellular subscriber device of nest user equipment to D2D user equipment.
3. the resource allocation device of D2D user in cellular network according to claim 1, which is characterized in that the mode
Selecting unit, suitable for based on the interference distance matrix and noise between the D2D user equipment being calculated and cellular subscriber device
Than interference threshold, calculates each D2D user equipment and use the function respectively met when multiplexed communications mode on uplink
Rate constraint condition；It is then the D2D when the transmission power for determining the D2D user equipment meets the power constraints
User equipment distributes multiplexed communications mode on uplink；Described in meeting when the transmission power for determining the D2D user equipment
When power constraints, then private communication mode is distributed on uplink for the D2D user equipment.
4. the resource allocation device of D2D user in cellular network according to claim 1 or 2, which is characterized in that using multiple
The power constraints respectively met with the D2D user equipment of communication pattern are as follows:
Wherein, PD(m) the transmission power of m-th of D2D user equipment is indicated,Indicate that m-th of D2D user equipment is minimum
Send the transmission power row vector in power matrix, i.e., it is minimum to send m row all elements in power matrix, PDMin indicates D2D
User equipment allows minimum transmission power,Indicate that m-th of D2D user equipment maximum sends the power in power matrix
Value, i.e., maximum m-th of the element sent in power matrix, PDMax indicates that D2D user equipment allows maximum transmission power.
5. the resource allocation device of D2D user in cellular network according to claim 3, which is characterized in that further include:
Power distributing unit, suitable for being each based on the power constraints that D2D user equipment respectively meets under multiplexer mode
D2D user equipment distributes corresponding transmission power.
6. the resource allocation device of D2D user in cellular network according to claim 5, which is characterized in that power distribution
Unit, suitable for based on the power constraints that D2D user equipment respectively meets under multiplexer mode, generating includes multiple harmony vectors
Harmony data base；Global adaptive harmony chess game optimization is carried out to the harmony vector in the harmony data base, obtain so that
The maximum best harmony vector of throughput of system；Using identified best harmony vector to each using described in multiplexer mode
D2D user equipment carries out power distribution.
7. the resource allocation device of D2D user in cellular network according to claim 6, which is characterized in that the power
Allocation unit is suitable for executing a harmony chess game optimization using global adaptive harmonic search algorithm, obtains returning when previous iteration
The best harmony vector returned；It will be when the corresponding maximum transmitted of harmony of each sequence in the best harmony vector that previous iteration returns
Maximum transfer speed corresponding with the harmony of corresponding positions sequence in the best harmony vector that last iteration returns carries out speed respectively
Compare；When the corresponding maximum transfer speed of harmony for determining corresponding positions sequence in the best harmony vector returned when previous iteration
When corresponding to the corresponding maximum transfer speed of harmony of position sequence in the best harmony vector returned greater than last iteration, using current
The best harmony vector that the harmony of corresponding positions sequence replaces the last iteration to return in the best harmony vector that secondary iteration returns
The harmony of middle correspondence position sequence obtains the final best harmony vector when previous iteration returns；Next iteration is executed, until repeatedly
Generation number reaches preset frequency threshold value, obtains so that the maximum best harmony vector of throughput of system.
8. the resource allocation device of D2D user in cellular network according to claim 7, which is characterized in that the power
Allocation unit, suitable for the maximum transfer speed is calculated using following formula:
Wherein, maxR indicates the maximum transfer speed, μm,nIndicate that i.e. multiplexer mode value is 1, die for special purpose with frequency selective factor B
Formula value is 0, PD(m) transmission power when m-th of D2D user equipment multiplexing cellular subscriber device uplink, d are indicatedD(m) table
Show m-th of D2D user receiving end at a distance from transmitting terminal, k indicates path loss decay factor, and α indicates path loss damped expoential, ID(m)
Indicate the co-channel interference that m-th of D2D user receiving end is subject to, N0White Gaussian noise present in expression system, PC(n) n-th is indicated
The transmission power of a cellular subscriber device, dD(n) distance of n-th of phone user to base station, I are indicatedC(n) n-th of honeycomb is indicated
The co-channel interference that user receiving end is subject to.
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