CN106162855B - It communicates in conjunction with more D2D of subcarrier distribution and power control to resource allocation methods - Google Patents
It communicates in conjunction with more D2D of subcarrier distribution and power control to resource allocation methods Download PDFInfo
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- CN106162855B CN106162855B CN201610465818.XA CN201610465818A CN106162855B CN 106162855 B CN106162855 B CN 106162855B CN 201610465818 A CN201610465818 A CN 201610465818A CN 106162855 B CN106162855 B CN 106162855B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
Abstract
The invention discloses more D2D of a kind of distribution of combination subcarrier and power control to communicate to resource allocation methods, it include: that the constraint conditions such as power limit are sent according to the limitation of network actual gain, the achievable rate limitation of phone user and D2D maximum, building turns to the optimization problem of target with D2D and honeycomb and spectrum efficiency maximum；Calculate optimum transmission power of the D2D communication to k on phone user's subcarrier m；Using cyclic search, filter out maximum and spectral efficiency values and its corresponding D2D communication to and sub-carrier resources multiplexed combinations；Judge that can sub-carrier resources meet phone user's QoS demand, D2D user's maximum sends the constraint conditions such as power threshold.The present invention is while guaranteeing network actual gain demand, phone user's QoS demand, interfering with each other between limitation phone user and D2D user, the sum frequency efficiency performance of entire hybrid network can be greatly promoted, and computational complexity is low, is suitable for multiple D2D communications to the hybrid network coexisted with multiple phone users.
Description
Technical field
The invention belongs to wireless communication technology fields, more particularly, to a kind of distribution of combination subcarrier and power control
D2D communicate to resource allocation methods.
Background technique
In recent years, with the development of wireless communication technique, emerging data-intensive business and service are continued to bring out, higher
Data rate and frequency spectrum resource demand allow conventional cellular communication mode to face huge challenge.It is more in order to cope with such problem
Equipment room (Device-to-Device, abbreviation D2D) communication is introduced into cellular system, by way of spectrum reuse and traditional
Composition hybrid network coexists in cellular network.D2D communication can allow two closer user equipmenies in geographical location in the case where base station assists
It establishes D2D and leads directly to link, data can bypass base station, directly carry out high-speed transfer by D2D link.By introducing D2D short distance
From communication, it can obtain and promote network throughput, reduce data transmission delay, improve the positive increasings such as cellular frequency spectrum efficiency
Benefit.However, the frequency spectrum resource of D2D communication multiplexing phone user also brings along interference, the positive normal open of D2D and phone user are influenced
Letter reduces system performance.Therefore, it is necessary to reasonable resource allocation methods interference is effectively reduced, and maximize D2D communication to network
Gain.
D2D resource allocation methods in existing hybrid network, mainly include following several: (1) multiplexing is fixed in D2D communication
Sub-carrier resources；Sub-carrier resources of (2) D2D communications to one phone user of multiplexing；(3) single D2D communication is to multiple
With the sub-carrier resources of multiple phone users, and all maximized with network throughput, spectrum efficiency maximum turns to optimization aim,
Carry out resource allocation.
However, above-mentioned first method, which exists, to be flexibly, dynamically DD2D communication to distribution resource, it can not be effective
The characteristics of using D2D high spectrum utilization；The shortcomings that above-mentioned second method, is in actual conditions that phone user's quantity is often
It can only consider that D2D communication to the sub-carrier resources of one phone user of multiplexing, cannot achieve much larger than the quantity of D2D communication pair
The efficient utilization of honeycomb sub-carrier resources, causes the waste of cell resource.The problem of the third method is, single D2D communication pair
Communication scenes be unsatisfactory for more D2D in actual scene and communicate to the environment coexisted.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides a kind of distribution of combination subcarrier and power
The D2D of control is communicated to resource allocation methods, it is intended that solving not communicating present in above-mentioned existing method for D2D
To dynamic allocation of resources, cannot achieve honeycomb sub-carrier resources efficiently utilize and be unable to satisfy it is more in practical communication scene
D2D is communicated to technical problems such as the environment coexisted.
To achieve the above object, according to one aspect of the present invention, a kind of distribution of combination subcarrier and power control are provided
More D2D of system are communicated to resource allocation methods, including the following steps:
(1) sub-carrier resources that communication in D2D network is multiplexed phone user m to k are obtained, and with network actual gain limit
The maximum power limit that sends of system, the achievable rate limitation of phone user and D2D network is constraint condition, is constructed with D2D net
Network and cellular network and spectrum efficiency maximum turn to the Optimized model of target:
(2) communication in D2D network is obtained according to the Optimized model of step (1) building to provide k in the subcarrier of phone user m
Optimum transmission power on source；
(3) multiple D2D networks and cellular network are obtained according to the optimum transmission power that step (2) obtain and frequency spectrum effect
Rate therefrom selects maximum and spectral efficiency values, and determines the communication in its corresponding D2D network to k*With phone user m*；
(4) communication in the maximum D2D network corresponding with spectral efficiency values that judgment step (3) obtains is to k*It is used with honeycomb
Family m*Whether meet preset constraint condition, is transferred to step (5) if meeting, otherwise return step (3)；
It (5) is D2D communication to k* and phone user m* according to the communication in maximum D2D network corresponding with spectral efficiency values
Sub-carrier resources are distributed to k*；
(6) judge with the presence or absence of remaining sub-carrier resources in cellular network, if it does not exist, then process terminates, if depositing
Then remaining sub-carrier resources are being allocated:
(7) communication in each D2D network is obtained according to all sub-carrier resources the allocated in step (5) and (6)
To optimal transmission power on each subcarrier；
(8) the total frequency spectrum efficiency of D2D network and cellular network is obtained according to the optimal transmission power that step (7) obtains.
Preferably, the above-mentioned Optimized model constructed in step (1) is indicated by following formula:
Wherein, k indicates the communication in D2D network to serial number, and m expression is communicated the honeycomb that sub-carrier resources are multiplexed to k
User's serial number, s.t. indicate constraint symbol；S.t. the subsequent formula of symbol is expressed as constraint formula；For D2D network
Middle communication is to the D2D user's spectrum efficiency generated after the sub-carrier resources m of k multiplexing phone user；For D2D network
With cellular network and spectrum efficiency；To communicate the sub-carrier resources m for being multiplexed phone user to k in cellular network
The phone user's spectrum efficiency generated afterwards；Symbol max indicates maximizing symbol；It is communication in D2D network to k
It is multiplexed the sub-carrier resources bring network postiive gain of phone user m；Bee is multiplexed to k for communication in D2D network
The negative gain of sub-carrier resources bring network of nest user m；For the minimum achievable rate threshold value of phone user m；For
The maximum of communication pair sends power threshold in D2D network.
Preferably, the D2D user's frequency spectrum generated after the sub-carrier resources m to k multiplexing phone user is communicated in D2D network to imitate
RateAnd the phone user's frequency generated after the sub-carrier resources m to k multiplexing phone user is communicated in cellular network
Spectrum efficiencyIt is respectively as follows:
WhereinRespectively indicate link channel gain, D2D net of the phone user m to base station
The link channel gain to k, interfering link channel increasing of the communication to the receiving end k in phone user's m to D2D network are communicated in network
Interfering link channel gain of the communication to k transmitting terminal to base station in benefit, D2D network；For the white Gaussian noise in model；
Maximum for phone user m sends power；For hair of the communication to k in the sub-carrier resources of phone user m in D2D network
Power is penetrated, and meets following condition:
Wherein, subscript k=1,2 ..., K；Subscript m=1,2 ..., M；Communication in each D2D network is communicated to by D2D
Transmitting terminal and D2D communication receiver composition；K indicates the sum of communication pair in D2D network；M indicates that the user in cellular network is total
Number；
Wherein,
WhereinExpression is meetingUnder the conditions of, communication exists to k in D2D network
The attainable minimum transmission power of institute in the sub-carrier resources of phone user m, and
It indicates in the case where meeting the constraint condition of above-mentioned C2 and C3, communication is to k phone user m's in D2D network
The attainable maximum transmission power of institute in sub-carrier resources.
Preferably, step (2) is specifically to use formula:
Wherein,
And have:
Expression is projected in sectionOn value；
Preferably, step (3) is specifically to use following formula:
Preferably, the constraint condition in step (3) is:
WhereinIt is the communication in D2D network to k*Assigned transmission power；It is logical in D2D network
Letter is to k*The transmission power that will be assigned.
Preferably, step (5) includes following sub-step:
(5-1) judges bee to k* and phone user m* according to the communication in maximum D2D network corresponding with spectral efficiency values
Whether the sub-carrier resources of nest user m* are unassigned, if it is, being transferred to step (5-2), are otherwise transferred to step (5-3).
The sub-carrier resources of phone user m* are put into the communication in current D2D network to effective allocation set of k* by (5-2)
In conjunction, and the sub-carrier resources in the candidate allocation set of remaining communication pair in addition to k* are deleted in D2D network, to ensure
Different D2D users are multiplexed different sub-carrier resources, and process terminates, wherein in each D2D network communication pair candidate allocation collection
The initial value of conjunction is { 1,2 ..., M }, and the initial value of effectively distribution set is empty set；
(5-3) deletes the sub-carrier resources from the candidate allocation set of communications pair all in D2D network.
Preferably, it is to be according to the following formula allocated remaining sub-carrier resources in step (6):
Wherein, k ' and m ' respectively indicates communication pair in current D2D network, and is multiplexed sub-carrier resources to k ' by communicating
Phone user's serial number；Ω is currently available sub-carrier resources；It is communication in D2D network to k ' access honeycomb
D2D network spectrum efficiency after network；It is communication in D2D network to the Cellular Networks after k ' access cellular network
Network spectrum efficiency；The spectrum efficiency of cellular network when not access D2D communication.
Preferably, step (7) specifically:
Firstly, determining the upper and lower bound value of Lagrange multiplier ν:
Wherein, νuFor the value upper bound of Lagrange multiplier ν；νlFor the value lower bound of Lagrange multiplier ν；Max { x } table
Show and takes wherein the maximum；Min { x } expression takes wherein reckling；Effective distribution of k is gathered for the communication in D2D network；
Secondly, finding Lagrange multiplier ν most according to the upper and lower bound value of Lagrange multiplier ν and using dichotomy
Figure of merit ν*, by the ν*It substitutes into following simple cubic equation, finds out optimal transmission powerIt is set to meet equation
Wherein,To communicate the optimal transmission power to k in the sub-carrier resources of phone user m in D2D network,
And meet:To be projected in sectionInterior solution.
Preferably, step (8) is using following formula:
Wherein,Indicate the total frequency spectrum efficiency of D2D network and cellular network,It indicates to lead in D2D network
Letter is to k and setIn it is all phone user's and spectrum efficiency, expression formula are as follows:
Wherein, πk,mIndicate whether the sub-carrier resources of phone user m are communicated the binary system point being multiplexed to k in D2D network
With the factor, and πk,m∈{0,1}；πk,m=0 expression subcarrier, which is not communicated, is multiplexed k；πk,m=1 expression subcarrier is communicated
K is multiplexed；Indicate in D2D network communication to k and phone user m's and spectrum efficiency.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect:
1, the method for the present invention is able to solve present in existing D2D resource allocation methods and can not dynamically, flexibly lead to for D2D
The technical issues of letter is to distribution sub-carrier resources: since present invention employs step (3), (4), (5) and steps (6), according to letter
The difference of the channel quality of number link and interfering link is different D2D communication to selecting optimal honeycomb subcarrier to answer
With the problem of being able to solve as D2D communication to dynamic distribution resource.
2, the method for the present invention, which is able to solve present in existing D2D resource allocation methods, cannot achieve honeycomb sub-carrier resources
The technical issues of efficiently utilizing: due to combining subcarrier present invention employs step (3), (4), (5), (6) and step (7)
Distribution and power control so that each D2D communication is to can be with the subcarrier of the multiple phone users of concurrent multiplexing, and are carried in corresponding son
Optimal power is obtained on wave to inhibit to interfere, therefore can solve the technical issues of honeycomb sub-carrier resources efficiently utilize.
3, the method for the present invention is able to solve present in existing D2D resource allocation methods and is unable to satisfy in practical communication scene
The technical issues of more D2D communications are to the environment coexisted: logical with multiple D2D since present invention employs steps (1) and step (2)
Letter is to the hybrid network scenario building Optimized model coexisted with multiple phone users and solves, therefore can satisfy in actual scene
More D2D communications are to the environment coexisted.
4, the method for the present invention is considered when D2D communicates multiplexing honeycomb sub-carrier resources, and the interference of introducing can be in certain journey
The case where D2D communication bring performance gain is offset on degree, introduces network actual gain limit in the Optimized model of step (1)
The constraint condition of system can play the advantage of D2D communication to the greatest extent, promote the performance of hybrid network.
Detailed description of the invention
Fig. 1 is that the present invention combines subcarrier distribution and more D2D communication of power control to the flow chart of resource allocation methods.
Fig. 2 is that the present invention is based on more D2D communications to mixed network structure schematic diagram.
Fig. 3 is phone user and D2D communication of the invention to frequency under the conditions of different capacity limitation and D2D communication distance
Spectrum efficiency figure.
Fig. 4 be the present invention under different phone user's quantity with the network total frequency spectrum efficiency chart of other three kinds of project plan comparisons.
Fig. 5 is network total frequency spectrum of the present invention under different D2D maximum power restrictive conditions with other three kinds of project plan comparisons
Efficiency chart.
Fig. 6 is that the present invention is total with the network of other three kinds of project plan comparisons under different phone user's minimum-rate restrictive conditions
Spectrum efficiency figure.
Fig. 7 is network total frequency spectrum efficiency chart of the present invention in the case where different D2D are communicated to quantity with other three kinds of project plan comparisons,
Wherein: scheme 1 is each D2D communication to the resource allocation methods for being only multiplexed a cellular uplink subcarrier, and D2D is communicated to traversal
Each subcarriers maximize network total frequency spectrum efficiency.Scheme 2 is to be each D2D communication at random on one honeycomb of distribution
Row subcarrier, and distribute D2D transimission power and make the maximized resource allocation methods of spectrum efficiency.Scheme 3 is only one D2D logical
Letter can be multiplexed multiple cellular uplink sub-carrier resources to authorized, maximize network total frequency spectrum efficiency.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
The present invention is combined with the Resource Allocation Formula of subcarrier distribution and power control, and system noise is spectral density
It is the zero-mean additive white Gaussian noise of -174dBm/Hz, channel model considers simple path loss model, marked according to 3GPP
It is provided in standard, cellular communication link Ld(dB)=128.1+37.6log10(d [km]), D2D communication link are Ld(dB)=148
+40log10(d[km])。
The invention proposes a kind of resource allocation methods of joint subcarrier distribution and power control.In order to improve frequency spectrum effect
Rate and ratio avoid the same layer between D2D user from interfering, and the present invention allows D2D communication to the frequency spectrum resource for being multiplexed multiple phone users
Come, and the frequency spectrum resource of each phone user at most can only be by a D2D communication to shared.When D2D communicates multiplexing cellular frequency spectrum
When resource, the cross-layer of introducing is interfered, and can be offset to a certain extent D2D and be communicated bring performance gain.Therefore present invention introduces
The concept of performance postiive gain and the negative gain of performance, can make the actual gain demand of hybrid network be protected.Meanwhile this hair
It is bright to ensure that phone user's QoS demand, it limits the maximum of D2D communication and sends power, by being more D2D communication to distribution
Carrier wave, the optimized power control on corresponding subcarrier, to optimize the spectrum efficiency of entire hybrid network.Compared to traditional resource
Distribution method, the present invention are suitble to more D2D communications to the hybrid network coexisted with more phone users, can guarantee that phone user is normal
Communication quality limits the interference between phone user and D2D user, maximumlly using honeycomb authorization frequency spectrum resource to enhance nothing
The spectrum efficiency performance of gauze network.
As shown in Figure 1, the distribution of present invention combination subcarrier and more D2D communication of power control include to resource allocation methods
The following steps:
(1) sub-carrier resources that communication in D2D network is multiplexed phone user m to k are obtained, and with network actual gain limit
The maximum power limit that sends of system, the achievable rate limitation of phone user and D2D network is constraint condition, is constructed with D2D net
Network and cellular network and spectrum efficiency maximum turn to the Optimized model of target:
Specifically, the above-mentioned Optimized model of building is indicated by following formula:
Wherein, k indicates the communication in D2D network to serial number, and m expression is communicated the honeycomb that sub-carrier resources are multiplexed to k
User's serial number, s.t. indicate constraint symbol；S.t. the subsequent formula of symbol is expressed as constraint formula；For D2D network
Middle communication is to the D2D user's spectrum efficiency generated after the sub-carrier resources m of k multiplexing phone user；For D2D network
With cellular network and spectrum efficiency；To communicate the sub-carrier resources m for being multiplexed phone user to k in cellular network
The phone user's spectrum efficiency generated afterwards；Symbol max indicates maximizing symbol；It is communication in D2D network to k
It is multiplexed the sub-carrier resources bring network postiive gain of phone user m；Bee is multiplexed to k for communication in D2D network
The negative gain of sub-carrier resources bring network of nest user m；For the minimum achievable rate threshold value of phone user m；For
The maximum of communication pair sends power threshold in D2D network；
Wherein,
WhereinRespectively indicate link channel gain, D2D net of the phone user m to base station
The link channel gain to k, interfering link channel increasing of the communication to the receiving end k in phone user's m to D2D network are communicated in network
Interfering link channel gain of the communication to k transmitting terminal to base station in benefit, D2D network；For the white Gaussian noise in model；
Maximum for phone user m sends power；For hair of the communication to k in the sub-carrier resources of phone user m in D2D network
Power is penetrated, and meets following condition:
Wherein, subscript k=1,2 ..., K；Subscript m=1,2 ..., M；Communication in each D2D network is communicated to by D2D
Transmitting terminal and D2D communication receiver composition；K indicates the sum of communication pair in D2D network；M indicates that the user in cellular network is total
Number；
Wherein,
WhereinExpression is meetingUnder the conditions of, communication exists to k in D2D network
The attainable minimum transmission power of institute in the sub-carrier resources of phone user m, and
It indicates in the case where meeting the constraint condition of above-mentioned C2 and C3, communication is to k phone user m's in D2D network
The attainable maximum transmission power of institute in sub-carrier resources.
(2) communication in D2D network is obtained according to the Optimized model of step (1) building to provide k in the subcarrier of phone user m
Optimum transmission power on sourceThis step specifically uses formula:
Wherein,
And have:
Expression is projected in sectionOn value；If in sectionInside have
Two solutions, then take more excellent solution.
(3) optimum transmission power obtained according to step (2)Obtain multiple D2D networks and cellular network and frequency spectrum
Efficiency therefrom selects maximum and spectral efficiency values, and determines the communication in its corresponding D2D network to k*With phone user m*；
The specifically used following formula of this step:
(4) communication in the maximum D2D network corresponding with spectral efficiency values that judgment step (3) obtains is to k*It is used with honeycomb
Family m*Whether constraint condition is met:
Step (5) are transferred to if meeting, otherwise return step (3)；
WhereinIt is the communication in D2D network to k*Assigned transmission power；It is logical in D2D network
Letter is to k*The transmission power that will be assigned；
It (5) is D2D communication to k* and phone user m* according to the communication in maximum D2D network corresponding with spectral efficiency values
Sub-carrier resources are distributed to k*；
This step includes following sub-step:
(5-1) judges bee to k* and phone user m* according to the communication in maximum D2D network corresponding with spectral efficiency values
Whether the sub-carrier resources of nest user m* are unassigned, if it is, being transferred to step (5-2), are otherwise transferred to step (5-3)；
The sub-carrier resources of phone user m* are put into the communication in current D2D network to effective allocation set of k* by (5-2)
In conjunction, and the sub-carrier resources in the candidate allocation set of remaining communication pair in addition to k* are deleted in D2D network, to ensure
Different D2D users are multiplexed different sub-carrier resources, and process terminates, wherein in each D2D network communication pair candidate allocation collection
The initial value of conjunction is { 1,2 ..., M }, and the initial value of effectively distribution set is empty set；
(5-3) deletes the sub-carrier resources from the candidate allocation set of communications pair all in D2D network.
(6) judge with the presence or absence of remaining sub-carrier resources in cellular network, if it does not exist, then process terminates, if depositing
Then remaining sub-carrier resources are being allocated according to the following formula:
Wherein, k ' and m ' respectively indicates communication pair in current D2D network, and is multiplexed sub-carrier resources to k ' by communicating
Phone user's serial number；Ω is currently available sub-carrier resources；It is communication in D2D network to k ' access honeycomb
D2D network spectrum efficiency after network；It is communication in D2D network to the Cellular Networks after k ' access cellular network
Network spectrum efficiency；The spectrum efficiency of cellular network when not access D2D communication；Meet above formula, then shows when D2D communication pair
When the frequency spectrum resource of k ' multiplexing phone user m ', positive spectral efficiency gain, while network and spectrum efficiency can be come to Netowrk tape
Reach maximization.
(7) communication in each D2D network is obtained according to all sub-carrier resources the allocated in step (5) and (6)
To optimal transmission power on each subcarrier, method particularly includes:
Firstly, determining the upper and lower bound value of Lagrange multiplier ν:
Wherein, νuFor the value upper bound of Lagrange multiplier ν；νlFor the value lower bound of Lagrange multiplier ν；Max { x } table
Show and takes wherein the maximum；Min { x } expression takes wherein reckling；Effective distribution of k is gathered for the communication in D2D network；
Secondly, finding Lagrange multiplier ν most according to the upper and lower bound value of Lagrange multiplier ν and using dichotomy
Figure of merit ν*, by the ν*It substitutes into following simple cubic equation, finds out optimal transmission powerIt is set to meet equation
Wherein,To communicate the optimal transmission power to k in the sub-carrier resources of phone user m in D2D network,
And meet:To be projected in sectionInterior solution；If there is multiple solutions, then more excellent solution is taken；
(8) the total frequency spectrum efficiency of D2D network and cellular network is obtained according to the optimal transmission power that step (7) obtains:
Wherein,Indicate the total frequency spectrum efficiency of D2D network and cellular network,It indicates to lead in D2D network
Letter is to k and setIn it is all phone user's and spectrum efficiency, expression formula are as follows:
Wherein, πk,mIndicate whether the sub-carrier resources of phone user m are communicated the binary system point being multiplexed to k in D2D network
With the factor, and πk,m∈{0,1}；πk,m=0 expression subcarrier, which is not communicated, is multiplexed k；πk,m=1 expression subcarrier is communicated
K is multiplexed；Indicate in D2D network communication to k and phone user m's and spectrum efficiency.
In the present embodiment, Fig. 3 is based on the honeycomb and D2D frequency spectrum under the conditions of different capacity limitation and D2D communication distance
Efficiency chart.From the figure 3, it may be seen that in the present embodiment method, the increase of D2D power can be obviously improved D2D communication spectrum efficiency, and D2D
The reduction of communication distance can effectively improve entire hybrid network total frequency spectrum efficiency.Fig. 4 is based under different phone user's quantity
The network total frequency spectrum efficiency chart of various schemes.As shown in Figure 4, the present embodiment method is bright in network total frequency spectrum efficiency performance boost
It is aobvious to be better than other traditional schemes, and with the increase of phone user's quantity, other schemes are compared, performance gap is bigger.Fig. 5 is
Network total frequency spectrum efficiency chart based on various schemes under different D2D maximum power restrictive conditions.Fig. 6 is based on different phone users
The network total frequency spectrum efficiency chart of various schemes under minimum-rate restrictive condition.As seen from Figure 5, network total frequency spectrum efficiency is not
It is but to progressively reach a metastable value as D2D power increase increases without limitation.And Fig. 6 shows with phone user
The raising of minimum-rate limitation, hybrid network total frequency spectrum efficiency can slightly decrease.Fig. 7 is to communicate logarithm based on different D2D
The network total frequency spectrum efficiency chart of various schemes under amount.As seen from Figure 7, as D2D communicates the increase to quantity, network is total
Spectrum efficiency linearly increases, this shows that the present embodiment method is widely used in the various hybrid networks of more D2D communications pair
Scene, and performance is generally higher than other three kinds of traditional schemes.
In conclusion compared with prior art, in hybrid network provided by the invention method be suitble to more D2D communications to it is more
The hybrid network that phone user coexists carries out combined optimization by sub-carrier distribution and power control, can guarantee that honeycomb is used
Normal communication quality in family limits the interference between phone user and D2D user, maximumlly using honeycomb authorization frequency spectrum resource to
Enhance the spectrum efficiency performance of wireless network.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (7)
1. more D2D of a kind of combination subcarrier distribution and power control are communicated to resource allocation methods, which is characterized in that including under
Column step:
(1) sub-carrier resources that communication in D2D network is multiplexed phone user m to k are obtained, and limited with network actual gain,
The achievable rate of phone user limits and the maximum power limit that sends of D2D network is constraint condition, building with D2D network with
Cellular network and spectrum efficiency maximum turn to the Optimized model of target: the above-mentioned Optimized model constructed in this step be by with
Lower formula indicates:
Wherein, k indicates the communication in D2D network to serial number, and m expression is communicated the phone user that sub-carrier resources are multiplexed to k
Serial number, s.t. indicate constraint symbol；S.t. the subsequent formula of symbol is expressed as constraint formula；To lead in D2D network
Believe the D2D user's spectrum efficiency generated after the sub-carrier resources m to k multiplexing phone user；For D2D network and bee
Nest network and spectrum efficiency；It is produced after being multiplexed the sub-carrier resources m of phone user to k for communication in cellular network
Raw phone user's spectrum efficiency；Symbol max indicates maximizing symbol；K is multiplexed for communication in D2D network
The sub-carrier resources bring network postiive gain of phone user m；Honeycomb is multiplexed to k for communication in D2D network to use
The negative gain of sub-carrier resources bring network of family m；For the minimum achievable rate threshold value of phone user m；For D2D
The maximum of communication pair sends power threshold in network；
The D2D user's spectrum efficiency generated after the sub-carrier resources m to k multiplexing phone user is communicated in D2D networkAnd the phone user's frequency spectrum generated after the sub-carrier resources m to k multiplexing phone user is communicated in cellular network
EfficiencyIt is respectively as follows:
WhereinPhone user m is respectively indicated into the link channel gain, D2D network of base station
Communicate the link channel gain to k, interfering link channel gain, D2D of the communication to the receiving end k in phone user's m to D2D network
The interfering link channel gain to k transmitting terminal to base station is communicated in network；For the white Gaussian noise in model；For honeycomb
The maximum of user m sends power；For transmitting function of the communication to k in the sub-carrier resources of phone user m in D2D network
Rate, and meet following condition:
Wherein, subscript k=1,2 ..., K；Subscript m=1,2 ..., M；Communication in each D2D network communicates transmission to by D2D
End and D2D communication receiver composition；K indicates the sum of communication pair in D2D network；M indicates the total number of users in cellular network；
Wherein,
WhereinExpression is meetingUnder the conditions of, communication is to k in honeycomb in D2D network
The attainable minimum transmission power of institute in the sub-carrier resources of user m, and
Indicate in the case where meeting the constraint condition of above-mentioned C2 and C3, in D2D network communicate to k phone user m subcarrier
The attainable maximum transmission power of institute in resource；
(2) it is obtained and is communicated in D2D network to k in the sub-carrier resources of phone user m according to the Optimized model of step (1) building
Optimum transmission power；
(3) multiple D2D networks and cellular network are obtained according to the optimum transmission power that step (2) obtain and spectrum efficiency, from
The maximum and spectral efficiency values of middle selection, and determine the communication in its corresponding D2D network to k*With phone user m*；
(4) communication in the maximum D2D network corresponding with spectral efficiency values that judgment step (3) obtains is to k*With phone user m*
Whether meet preset constraint condition, is transferred to step (5) if meeting, otherwise return step (3)；Preset constraint condition is:
WhereinIt is the communication in D2D network to k*Assigned transmission power；For the communication pair in D2D network
k*The transmission power that will be assigned；
It (5) is that D2D is communicated to k* to k* and phone user m* according to the communication in maximum D2D network corresponding with spectral efficiency values
Distribute sub-carrier resources；
(6) judge with the presence or absence of remaining sub-carrier resources in cellular network, if it does not exist, then process terminates, and if it exists, then
Remaining sub-carrier resources are allocated:
(7) according to all sub-carrier resources the allocated in step (5) and (6) obtain the communication in each D2D network to
Optimal transmission power on each subcarrier；
(8) the total frequency spectrum efficiency of D2D network and cellular network is obtained according to the optimal transmission power that step (7) obtains.
2. more D2D communications according to claim 1 are to resource allocation methods, which is characterized in that step (2) is specifically to use
Formula:
Wherein,
And have:
Expression is projected in sectionOn value.
3. more D2D communications according to claim 2 are to resource allocation methods, which is characterized in that step (3) is specifically to use
Following formula:
4. more D2D communications according to claim 3 are to resource allocation methods, which is characterized in that step (5) includes following son
Step:
(5-1) judges that honeycomb is used to k* and phone user m* according to the communication in maximum D2D network corresponding with spectral efficiency values
Whether the sub-carrier resources of family m* are unassigned, if it is, being transferred to step (5-2), are otherwise transferred to step (5-3)；
The communication that the sub-carrier resources of phone user m* are put into current D2D network by (5-2) in effective distribution of k* set,
And the sub-carrier resources in the candidate allocation set of remaining communication pair in addition to k* are deleted in D2D network, to ensure difference
D2D user is multiplexed different sub-carrier resources, and process terminates, wherein the candidate allocation set of communication pair in each D2D network
Initial value is { 1,2 ..., M }, and the initial value of effectively distribution set is empty set；
(5-3) deletes the sub-carrier resources from the candidate allocation set of communications pair all in D2D network.
5. more D2D communication according to claim 4 is to resource allocation methods, which is characterized in that be in step (6) according to
Remaining sub-carrier resources are allocated by lower formula:
Wherein, k ' and m ' respectively indicates communication pair in current D2D network, and is communicated the bee that sub-carrier resources are multiplexed to k '
Nest user's serial number；Ω is currently available sub-carrier resources；It is communication in D2D network to k ' access cellular network
D2D network spectrum efficiency afterwards；To be communicated in D2D network to the cellular network frequency after k ' access cellular network
Spectrum efficiency；The spectrum efficiency of cellular network when not access D2D communication.
6. more D2D communications according to claim 5 are to resource allocation methods, which is characterized in that step (7) specifically:
Firstly, determining the upper and lower bound value of Lagrange multiplier ν:
Wherein, νuFor the value upper bound of Lagrange multiplier ν；νlFor the value lower bound of Lagrange multiplier ν；Max { x } expression takes
Wherein the maximum；Min { x } expression takes wherein reckling；Effective distribution of k is gathered for the communication in D2D network；
Secondly, finding the optimal value of Lagrange multiplier ν according to the upper and lower bound value of Lagrange multiplier ν and using dichotomy
ν*, by the ν*It substitutes into following simple cubic equation, finds out optimal transmission powerIt is set to meet equation
Wherein,To communicate the optimal transmission power to k in the sub-carrier resources of phone user m in D2D network, and it is full
Foot:To be projected in sectionInterior solution.
7. more D2D communications according to claim 6 are to resource allocation methods, which is characterized in that step (8) is using following
Formula:
Wherein,Indicate the total frequency spectrum efficiency of D2D network and cellular network,Indicate that communication is to k in D2D network
With setIn it is all phone user's and spectrum efficiency, expression formula are as follows:
Wherein, πk,mIndicate the sub-carrier resources of phone user m whether communicated in D2D network the binary system that k be multiplexed distribute because
Son, and πk,m∈{0,1}；πk,m=0 expression subcarrier, which is not communicated, is multiplexed k；πk,m=1 expression subcarrier, which is communicated, answers k
With；Indicate in D2D network communication to k and phone user m's and spectrum efficiency.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102083138A (en) * | 2011-01-14 | 2011-06-01 | 北京邮电大学 | Method for simultaneously multiplexing multiple cellular user resources by D2D (Device-to-Device) user pair |
| CN103024913A (en) * | 2012-12-21 | 2013-04-03 | 东南大学 | Method for direct-through self-adaptive grouping and resource allocating of cellular communication system terminals |
| CN103889061A (en) * | 2014-02-18 | 2014-06-25 | 南京邮电大学 | D2D user resource distribution method based on multicarrier communication |
| CN103957518A (en) * | 2014-05-13 | 2014-07-30 | 中国科学院上海微系统与信息技术研究所 | D2D communication method in cellular network |
| CN104854935A (en) * | 2012-12-10 | 2015-08-19 | 日电（中国）有限公司 | Methods and apparatuses of allocating resources for device-to-device communication |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130083684A1 (en) * | 2011-09-30 | 2013-04-04 | Electronics And Telecommunications Research Institute | Methods of device to device communication |
-
2016
- 2016-06-23 CN CN201610465818.XA patent/CN106162855B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102083138A (en) * | 2011-01-14 | 2011-06-01 | 北京邮电大学 | Method for simultaneously multiplexing multiple cellular user resources by D2D (Device-to-Device) user pair |
| CN104854935A (en) * | 2012-12-10 | 2015-08-19 | 日电（中国）有限公司 | Methods and apparatuses of allocating resources for device-to-device communication |
| CN103024913A (en) * | 2012-12-21 | 2013-04-03 | 东南大学 | Method for direct-through self-adaptive grouping and resource allocating of cellular communication system terminals |
| CN103889061A (en) * | 2014-02-18 | 2014-06-25 | 南京邮电大学 | D2D user resource distribution method based on multicarrier communication |
| CN103957518A (en) * | 2014-05-13 | 2014-07-30 | 中国科学院上海微系统与信息技术研究所 | D2D communication method in cellular network |
Non-Patent Citations (3)
| Title |
|---|
| Device-to-Device Communication in LTE-A Cellular Networks: Standardization, Architecture, and Challenge;Yong Liu等;《2014 IEEE 79th Vehicular Technology Conference (VTC Spring)》;20140521;全文 |
| Joint resource allocation and power control for cellular and device-to-device multicast based on cognitive radio;Xiaolu Wu等;《IET Communications》;20141106;第8卷;全文 |
| LTE系统中基于干扰受限的D2D通信资源分配方案;杨文慧;《信息科技辑》;20150831;全文 |
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