CN104918207B - More D2D communication resource allocation methods based on frequency spectrum resource distribution in heterogeneous network - Google Patents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D30/00—Reducing energy consumption in communication networks
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Abstract
The present invention discloses more D2D communication resource allocation methods based on frequency spectrum resource distribution in a kind of heterogeneous network, including：Seek D2D communications s attainable maximum SINR of institute on frequency range m；Judge that can frequency spectrum resource meet one-segment QoS requirement；Frequency spectrum resource is distributed for more D2D communication systems and judges to meet the total achievable rate threshold requirement of D2D communications；On frequency spectrum resource has been distributed, SINR target of the optimum allocation D2D communications in each selection frequency range；Seek the total power consumption of whole D2D communication systems.The present invention is at the same time more D2D allocation of communications frequency spectrum resources, and optimizes the total power consumption of whole D2D communication systems.Compared to traditional resource allocation methods, this method is suitable for more D2D communication systems, optimize the total power consumption of whole D2D communication systems while minimum achievable rate demand, the phone user's maximum power for ensureing cellular communication and D2D communications are limited, more meet the requirement of green communications.
Description
Technical field
The present invention relates to a kind of method of wireless communication technology field, is specifically to be based on frequency spectrum in a kind of heterogeneous network
More D2D (Device-to-Device) communication resource allocation method of resource allocation.
Background technology
In order to meet the multimedia equipment that sharply increases and service to the demand of frequency spectrum resource and data rate, wireless network
Start evolution towards heterogeneous network.As frequency spectrum resource and plant capacity are limited, how to improve the availability of frequency spectrum and reduce energy consumption
It is highly important.Traditional cellular communication modes have been difficult to efficiently solve the above problem, so the D2D communication technologys is general
Read and be introduced in 2009 in LTE network.D2D communications are short using D2D by establishing the direct transmission link without base station
Distance communication advantage, being capable of the effectively performance such as lifting system handling capacity, system energy consumption.Also, by allowing D2D communication users to answer
With the frequency spectrum resource of phone user, the availability of frequency spectrum can be greatly lifted.However, its interference problem introduced is wireless system
Primarily solve the problems, such as.Power Control is to realize a kind of key technology of isomery cellular network intermediate frequency spectrum resource-sharing, passes through conjunction
Reason ground control phone user and D2D user power so that when D2D communication access phone user authorize frequency range when, D2D communication and
Cellular communication can not influence the interference produced each other the normal communication of other side.
The resource allocation methods taken in traditional heterogeneous network D2D communications, are largely built upon single D2D communication systems
Unite on model, carry out the targets such as maximum system throughput, the availability of frequency spectrum, the needs of D2D communications at this time remain maximum transmission
Power transmission data, it is clear that be unsatisfactory for the requirement of green communications.At the same time, single D2D communication systems are also unsatisfactory for actual scene
In more D2D communication coexisted environments.
Some traditional heterogeneous networks only considered the feelings of a pair of of D2D communications and phone user's share spectrum resources
Condition.However, in the actual environment, the number of phone user is significantly larger than D2D user, if a pair of D2D communications can only be multiplexed one
The frequency spectrum resource of a phone user, it is clear that the waste of frequency spectrum resource can be caused.
The resource allocation methods taken in some traditional heterogeneous networks D2D communications, are largely built upon and only ensure
Carried out in the premise of single phone user's service quality (Quality of Service, QoS) or D2D communications QoS.It is aobvious
So, so QoS that can not ensure phone user and D2D user at the same time.
The content of the invention
The uplink heterogeneous network model that the present invention coexists for a base station, more phone users and more D2D communication users, carries
A kind of resource allocation methods based on frequency spectrum resource distribution and optimal power control are gone out.It is multiple that the present invention allows single D2D to communicate
The availability of frequency spectrum is improved with the frequency spectrum resource of multiple phone users, the frequency spectrum resource of each phone user at most can only be by one
D2D communications are shared.As phone user and D2D users to share frequency spectrum resources, it is necessary to ensure cellular communication and D2D communication one-segments
Upper minimum achievable rate threshold requirement and consideration phone user's maximum transmit power are limited；Meanwhile to make full use of D2D short distances
From the advantage of communication, D2D communications need to ensure a total achievable rate threshold requirement on the frequency spectrum resource of all multiplexings.Pass through
For more D2D allocation of communications frequency spectrum resources, and on the basis of allocated frequency spectrum resource each D2D communications of optimum allocation each
The achievable rate target in frequency range is chosen to optimize the total power consumption of whole D2D communication systems.The present invention can be more D2D at the same time
Allocation of communications frequency spectrum resource, and optimize on the frequency spectrum resource being assigned to the total power consumption of whole D2D communication systems.Compare
In traditional resource allocation methods, this method can be suitable for more D2D communication systems, and what guarantee cellular communication and D2D communicated can
Up to rate requirement, and whole D2D communication systems can be saved while meeting phone user's maximum transmit power and being limited
Total power consumption, can more meet the requirement of green communications.
The present invention is realized by following technical method.
More D2D communication resource distribution sides based on frequency spectrum resource distribution in a kind of heterogeneous network provided according to the present invention
Method, comprises the following specific steps that：
Step 1：AskWherein,Represent D2D communications s attainable maximum SINR of institute on frequency range m；D2D leads to
Letter s is s-th of D2D communication, and frequency range m is m-th of frequency range；S=1,2 ..., S；M=1,2 ..., M；
Step 2：Judge that can frequency spectrum resource meet one-segment QoS requirement；
Step 3：The frequency spectrum resource for meeting one-segment QoS requirement is ranked up；
Step 4：Frequency spectrum resource is distributed for more D2D communication systems；
Step 5：Judge that can be distributed frequency spectrum resource meet the total achievable rate threshold requirement of D2D communications；
Step 6：On frequency spectrum resource has been distributed, each D2D communications are distributed in each selection using method of Lagrange multipliers
SINR targets in frequency range；
Step 7：Seek the power consumption of D2D communications s
Step 8：Seek the total power consumption of whole D2D communication systems
Preferably,Expression formula it is as follows：
Wherein, subscript s=1,2 ..., S；Subscript m=1,2 ..., M；Subscript s represents D2D communications s, each D2D communications master
To be made of D2D communication transmitting terminals and D2D communication receivers；S represents D2D communication total numbers；Subscript m represents phone user m, bee
Nest user m is m-th of phone user, and phone user m uses frequency range m；M represents system cellular total number of users；Bracket]
Expression includes corresponding section end value, and (expression does not include corresponding section end value to round bracket；Wherein,
Expression is meetingWithUnder the conditions of, D2D communications s attainable maximum SINR of institute on frequency range m
Threshold value；Wherein,For the minimum achievable rate threshold requirement of phone user m in one-segment；Lead to for D2D in one-segment
Believe the minimum achievable rate threshold requirement of s；ForCorresponding SINR, wherein, It is full
Sufficient phone user m maximums transmit power constraintUnder the conditions of, D2D communications s attainable maximum SINR thresholds of institute on frequency range m
Value；Represent the maximum transmit power of phone user m；Represent phone user m to the chain of base station respectively
Path channels gain, the link channel gain of D2D communications s, link channel gain, the D2D of phone user m to D2D communication s receiving terminals
Link channel gain of the communication s transmitting terminals to phone user's m receiving terminals；N0For system noise.
Preferably, in step 2, judge that can frequency spectrum resource meet that the decision criteria of one-segment QoS requirement is：
If meeting above formula, show that there are SINR value on frequency range m by D2D communications sMeet single-frequency
Phone user m and D2D communication s minimum achievable rate threshold values in sectionDemand, and the maximum transmission of phone user m
Power thresholdEnsured；Wherein,Represent the SINR targets that D2D communications s is distributed on frequency range m；For
Corresponding SINR, wherein,
Preferably, in step 3, the frequency spectrum resource for meeting one-segment QoS requirement is ranked up criterion is：
S is communicated in the frequency spectrum resource under meeting the one-segment QoS requirement decision criteria of step 2 for D2D, according toValue to frequency spectrum resource carry out positive sequence sequence；Wherein, s=1,2 ..., S.
Preferably, in step 4, more D2D communication systems frequency spectrum resource allocation strategies are：
The frequency spectrum resource ordering scenario to be communicated according to each D2D, each round are followed successively by each D2D communications never by the D2D
Optimal frequency range is chosen in the frequency range chosen that communicates, most forward frequency range in the optimal frequency range, that is, frequency spectrum resource sequence；
During selection frequency range every time, if the frequency range selected by D2D communications is had reached needed for relative users
Frequency range number, then the frequency range is sequentially placed into respective alternative frequency range set；If D2D communicates when choosing the frequency range
Chosen it was found that the frequency range is communicated by other D2D, then using power consumption manner of comparison：Compare the two D2D communication users to exist
Meet the power consumption of D2D communications during minimum achievable rate threshold requirement in the frequency range, base station by the frequency spectrum resource distribute to power consumption compared with
Low D2D communications；
In the higher D2D communication users of the middle power consumption of power consumption, can choose sort in itself alternative frequency range set it is most forward
Frequency range as compensation, if the most forward frequency range of the sequence still selected by other D2D communications, according to the power consumption side
Other D2D of formula and this communicate do power dissipation ratio compared with；Until all D2D communicate selection frequency range number reach each needed for frequency range sum
It is required that or all available frequency ranges have already been selected and finish, system stop distribution frequency spectrum resource.
Preferably, in steps of 5, judge that can be distributed frequency spectrum resource meet the total achievable rate threshold value need of D2D communications
The decision criteria asked is：
Wherein, xsmTo represent frequency range m whether by the frequency allocation factor of D2D communication s selections, xsm={ 0,1 }；xsm=1 table
Show that frequency range m is chosen by D2D communications s；xsm=0 represents that frequency range m is not chosen by D2D communications s；For the total reachable of D2D communications s
Rate-valve value demand；NsThe frequency range sum for needing to choose altogether for D2D communications s；If above formula meets, then it represents that distributes to D2D and leads to
The frequency spectrum resource of letter s meets the total achievable rate threshold requirement of D2D communications.
Preferably, in step 6, D2D communications are distributed in an optimal manner using method of Lagrange multipliers and choose frequency each
SINR targets in section, specific method are：
λ is found using dichotomy*, the λ*The λ brought into following formula meetsWherein, subscript sn
Represent to choose frequency range sn, choose frequency range snThat is n-th of frequency range that D2D communications s chooses；Represent in Lagrange multiplier λ
Lower D2D communications s, which is assigned to, chooses frequency range snOn SINR targets, and need to meet：ForI.e.Not less than D2D communications s minimum SINR threshold values in one-segmentMax (A, B) represents to take the greater in A, B；Its
In,
Phone user s is represented respectivelynLink channel gain, the link letter of D2D communications s to base station
Road gain, phone user snLink channel gain, D2D communication s transmitting terminals to phone user s to D2D communication s receiving terminalsnReceive
The link channel gain at end；Represent phone user snMinimum SINR threshold values in one-segment；λ represents Lagrange multiplier, and
And λ >=0；N0For system noise；Phone user snS in expression systemnA phone user；Phone user snUse selection frequency range
sn。
Preferably,Represent the power consumption of D2D communications s；
Can if the frequency spectrum resource that D2D communications s is assigned to meets the frequency spectrum resource distributed in step 5 meet that D2D communicates
The decision criteria of total achievable rate threshold requirement, then the power consumption expression formula of D2D communications s is as follows：
Wherein,Represent power consumptions of the D2D communications s on frequency range m；Represent the optimal drawing tried to achieve in step 6
Ge Lang multipliers λ*Lower D2D communications s is assigned to the SINR targets on frequency range m；
Can if the frequency spectrum resource that D2D communications s is assigned to does not meet the frequency spectrum resource distributed in step 5 meet that D2D leads to
Believe the decision criteria of total achievable rate threshold requirement, thenThat is D2D communications s cannot be established.
Preferably, it is describedFor the total power consumption of whole D2D communication systems；
IfS=1,2 ..., S, thenExpression formula be：
Otherwise, returnS=1,2 ..., S.
Compared with prior art, the present invention has following beneficial effect：
The present invention can be at the same time more D2D allocation of communications frequency spectrum resources, and optimal on the frequency spectrum resource being assigned to
Change the total power consumption of whole D2D communication systems.Compared to traditional resource allocation methods, this method can be suitable for more D2D and communicate
System, can ensure the achievable rate demand of cellular communication and D2D communications, and can meet the maximum transmission work(of phone user
Rate saves the total power consumption of whole D2D communication systems while limited, can more meet the requirement of green communications.
Brief description of the drawings
Fig. 1 is flow chart of the present invention；
Fig. 2 is the present invention in cellular link minimum achievable rate threshold valueWhen increasing to 7bps/Hz from 1bps/Hz
Spectrum reuse probability graph；
Fig. 3 is the present invention in the total achievable rate threshold value of D2D communicationsSingle D2D when increasing to 45bps/Hz from 25bps/Hz
Communication system total power consumption and total rate increment figure；
Fig. 4 is the present invention in the total achievable rate threshold value of D2D communicationsIt is whole when increasing to 50bps/Hz from 25bps/Hz
D2D communication system total power consumption figures；
Fig. 5 is the present invention in the total achievable rate threshold value of D2D communicationsMethod of exhaustion when increasing to 50bps/Hz from 25bps/Hz
Each D2D communication systems total power consumption figure under scheme and the scheme proposed；
Fig. 6 is the present invention in the total achievable rate threshold value of D2D communicationsWhen increasing to 50bps/Hz from 25bps/Hz under scheme 1
Each D2D communication systems total power consumption figure；
Fig. 7 is the present invention in the total achievable rate threshold value of D2D communicationsInterruption when increasing to 50bps/Hz from 25bps/Hz
Probability graph.
Embodiment
Elaborate below in conjunction with the accompanying drawings to the embodiment of the present invention：The present embodiment using technical solution of the present invention before
Put and implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to down
The embodiment stated.
The present embodiment is the Resource Allocation Formula based on frequency spectrum resource distribution and optimal power control, and system noise is frequency spectrum
Density is the zero-mean additive white Gaussian noise of -174dBm/Hz, and channel model is simple path loss model, according to 3GPP
Regulation in standard, cellular communication link channel gain are Ld(dB)=128.1+37.6lg (d (km)), D2D communication links letter
Road gain is Ld(dB)=148+40lg (d (km)).
The present embodiment comprises the following steps：
Step 1：Seek D2D communications s attainable maximum SINR (Signal to Interference of institute on frequency range m
And Noise Ratio, SINR), it is denoted asWherein,For D2D communication s attainable maximums on frequency range m
SINR, expression formula are as follows：
Wherein, subscript s=1,2 ..., S；Subscript m=1,2 ..., M；Subscript s represents D2D communications s, each D2D communications master
To be made of D2D communication transmitting terminals and D2D communication receivers；S represents D2D communication total numbers；Subscript m represents phone user m, bee
Nest user m is m-th of phone user, and phone user m uses frequency range m；M represents system cellular total number of users；Bracket]
Expression includes corresponding section end value, and (expression does not include corresponding section end value to round bracket；Wherein,
Expression is meetingWithUnder the conditions of, D2D communications s attainable maximum SINR of institute on frequency range m
Threshold value；Wherein,For the minimum achievable rate threshold requirement of phone user m in one-segment；Lead to for D2D in one-segment
Believe the minimum achievable rate threshold requirement of s；ForCorresponding SINR, wherein, It is full
Sufficient phone user m maximums transmit power constraintUnder the conditions of, D2D communications s attainable maximum SINR thresholds of institute on frequency range m
Value；Represent the maximum transmit power of phone user m；Represent phone user m to the link of base station respectively
Channel gain, the link channel gain of D2D communications s, link channel gain, the D2D of phone user m to D2D communication s receiving terminals lead to
Believe s transmitting terminals to the link channel gain of phone user's m receiving terminals；N0For system noise.
Step 2：Judge that can frequency spectrum resource meet one-segment QoS requirement, its judgment criterion expression formula is as follows：
If meeting above formula, show that there are SINR value on frequency range m by D2D communications sMeet single-frequency
Phone user m and D2D communication s minimum achievable rate threshold values in sectionDemand, and the maximum transmission of phone user m
Power thresholdEnsured；Wherein,Represent the SINR targets that D2D communications s is distributed on frequency range m；For
Corresponding SINR, wherein,
Step 3：The frequency spectrum resource for meeting one-segment QoS requirement is ranked up, its ranking criteria is：Lead to for D2D
S is believed in the frequency spectrum resource under meeting the one-segment QoS requirement decision criteria of step 2, according toValue to frequency spectrum
Resource carries out positive sequence sequence；Wherein, s=1,2 ... S.
Step 4：Frequency spectrum resource is distributed for more D2D communication systems, wherein more D2D communication systems frequency spectrum resource allocation strategies
For：
The frequency spectrum resource ordering scenario to be communicated according to each D2D, each round are followed successively by each D2D communications never by the D2D
Optimal frequency range is chosen in the frequency range chosen that communicates, most forward frequency range in the optimal frequency range, that is, frequency spectrum resource sequence；
During selection frequency range every time, if the frequency range selected by D2D communications is had reached needed for relative users
Frequency range number, then the frequency range is sequentially placed into respective alternative frequency range set；If D2D communicates when choosing the frequency range
Chosen it was found that the frequency range is communicated by other D2D, then using power consumption manner of comparison：Compare the two D2D communication users to exist
Meet the power consumption of D2D communications during minimum achievable rate threshold requirement in the frequency range, base station by the frequency spectrum resource distribute to power consumption compared with
Low D2D communications；
In the higher D2D communication users of the middle power consumption of power consumption, can choose sort in itself alternative frequency range set it is most forward
Frequency range as compensation, if the most forward frequency range of the sequence still selected by other D2D communications, according to the power consumption side
Other D2D of formula and this communicate do power dissipation ratio compared with；Until all D2D communicate selection frequency range number reach each needed for frequency range sum
It is required that or all available frequency ranges have already been selected and finish, system stop distribution frequency spectrum resource.
Step 5：Judge that can be distributed frequency spectrum resource meet the total achievable rate threshold requirement of D2D communications, it judges accurate
Then expression formula is as follows：
Wherein, xsmTo represent frequency range m whether by the frequency allocation factor of D2D communication s selections, xsm={ 0,1 }；xsm=1 table
Show that frequency range m is chosen by D2D communications s；xsm=0 represents that frequency range m is not chosen by D2D communications s；For the total reachable of D2D communications s
Rate-valve value demand；NsThe frequency range sum for needing to choose altogether for D2D communications s；If above formula meets, then it represents that distributes to D2D and leads to
The frequency spectrum resource of letter s meets the total achievable rate threshold requirement of D2D communications.
Step 6：On frequency spectrum resource has been distributed, using method of Lagrange multipliers distribution D2D communications in each selection frequency range
On SINR targets, its distribution method is：
λ is found using dichotomy*, the λ*The λ brought into following formula meetsWherein, subscript sn
Represent to choose frequency range sn, choose frequency range snThat is n-th of frequency range that D2D communications s chooses；Represent in Lagrange multiplier λ
Lower D2D communications s, which is assigned to, chooses frequency range snOn SINR targets, and need to meet：ForI.e.Not less than D2D communications s minimum SINR threshold values in one-segmentMax (A, B) represents to take the greater in A, B；Its
In,
Phone user s is represented respectivelynLink channel gain, the link letter of D2D communications s to base station
Road gain, phone user snLink channel gain, D2D communication s transmitting terminals to phone user s to D2D communication s receiving terminalsnReceive
The link channel gain at end；Represent phone user snMinimum SINR threshold values in one-segment；λ represents Lagrange multiplier, and
And λ >=0；N0For system noise；Phone user snS in expression systemnA phone user；Phone user snUse selection frequency range
sn。
Step 7：The power consumption for asking D2D to communicateWherein,The total power consumption of D2D communication users s is represented, if s points of D2D communications
Can the frequency spectrum resource that be fitted on meets the frequency spectrum resource distributed in step 5 meet the total achievable rate threshold requirement of D2D communications
Decision criteria, then the power consumption expression formula of D2D communications s is as follows：
Wherein,Represent power consumptions of the D2D communications s on frequency range m；Represent the optimal drawing tried to achieve in step 6
Ge Lang multipliers λ*Lower D2D communications s is assigned to the SINR targets on frequency range m；
Can if the frequency spectrum resource that D2D communications s is assigned to does not meet the frequency spectrum resource distributed in step 5 meet that D2D leads to
Believe the decision criteria of total achievable rate threshold requirement, thenThat is D2D communications s cannot be established.
Step 8：Seek the total power consumption of whole D2D communication systemsWherein,For the total work of whole D2D communication systems
Consumption, ifS=1,2 ..., S, thenExpression formula be：
Otherwise, returnS=1,2 ..., S.
In the present embodiment, Fig. 2 is the spectrum reuse probability graph based on cellular link minimum achievable rate threshold value.By Fig. 2
Understand, more D2D communication systems can effectively improve system spectrum utilization rate.Fig. 3 is to be based on the total achievable rate of D2D communication systems
The system power dissipation and rate increment chart of percentage comparison of threshold value；From the figure 3, it may be seen that communicating in suitable D2D under total achievable rate demand, it is
Total rate increment of uniting is significantly larger than total system power consumption increment；Fig. 4 is the method for exhaustion based on the total achievable rate threshold value of D2D communication systems
Whole D2D communication systems total power consumption figure under scheme, the scheme and scheme 1 that propose.It is contemplated that what 2 couples of D2D communications coexisted
System, each D2D to being multiplexed the frequency spectrum resource of 5 phone users, and D2D preferentially established to 1 to 2 to base station requests than D2D it is straight
Connect letter.Wherein, the method for exhaustion calculates the result for being possible to optimal under frequency spectrum resource distribution；Scheme 1 is assumed first to establish directly logical
The link of letter request can preferentially be assigned to frequency spectrum resource optimal for which.Fig. 5 is to be based on the total achievable rate of D2D communication systems
The power consumption diagram of each D2D communication systems under the method for exhaustion scheme of threshold value, the scheme proposed；Fig. 6 always may be used based on D2D communication systems
The power consumption diagram of each D2D communication systems under up to the scheme 1 of rate-valve value；From Fig. 4, Fig. 5 and Fig. 6, the scheme ten of proposition
The performance of nearly method of exhaustion scheme is tapped, and can ensure a fairness between D2D communication users；Fig. 7 is to be based on D2D communication systems
Outage probability figure under three kinds of schemes of total achievable rate threshold value of uniting；When the frequency spectrum resource of system distribution cannot reach D2D communications
The band number of multiplexing cannot meet the total achievable rate demand of D2D communications, then D2D communication links will interrupt.Can by Fig. 7
Know, the scheme of proposition can ensure a fairness between D2D communication users, and performance is close to the performance of method of exhaustion scheme.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (5)
1. more D2D communication resource allocation methods based on frequency spectrum resource distribution in a kind of heterogeneous network, it is characterised in that including such as
Lower specific steps：
Step 1：AskWherein,Represent D2D communications s attainable maximum SINR of institute on frequency range m；D2D communication s be
Communicate for s-th of D2D, frequency range m is m-th of frequency range；S=1,2 ..., S；M=1,2 ..., M；
Step 2：Judge that can frequency spectrum resource meet one-segment QoS requirement；
Step 3：The frequency spectrum resource for meeting one-segment QoS requirement is ranked up；
Step 4：Frequency spectrum resource is distributed for more D2D communication systems；
Step 5：Judge that can be distributed frequency spectrum resource meet the total achievable rate threshold requirement of D2D communications；
Step 6：On frequency spectrum resource has been distributed, each D2D communications are distributed in each selection frequency range using method of Lagrange multipliers
On SINR targets；
Step 7：Seek the power consumption P of D2D communications ss D；
Step 8：Seek the total power consumption of whole D2D communication systems
Expression formula it is as follows：
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</msubsup>
</mrow>
</mfrac>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
Expression is meetingWithUnder the conditions of, D2D communications s attainable maximum SINR threshold values of institute on frequency range m；
Wherein,For the minimum achievable rate threshold requirement of phone user m in one-segment；Communicate s's for D2D in one-segment
Minimum achievable rate threshold requirement；ForCorresponding SINR, wherein, To meet honeycomb
User's m maximums transmit power constrainsUnder the conditions of, D2D communications s attainable maximum SINR threshold values of institute on frequency range m；
Represent the maximum transmit power of phone user m；Represent that the link channel of phone user m to base station increases respectively
Benefit, the link channel gain of D2D communications s, the link channel gain of phone user m to D2D communication s receiving terminals, D2D communication s hairs
Link channel gain of the sending end to phone user's m receiving terminals；N0For system noise；
In step 2, judge that can frequency spectrum resource meet that the decision criteria of one-segment QoS requirement is：
<mfenced open = "{" close = "">
<mtable>
<mtr>
<mtd>
<mrow>
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<mi>P</mi>
<mi>m</mi>
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</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
If meeting above formula, show that there are SINR value on frequency range m by D2D communications sMeet bee in one-segment
Nest user m and D2D communication s minimum achievable rate threshold valuesDemand, and the maximum transmit power threshold of phone user m
ValueEnsured；Wherein,Represent the SINR targets that D2D communications s is distributed on frequency range m；ForIt is corresponding
SINR, wherein,
In step 3, the frequency spectrum resource for meeting one-segment QoS requirement is ranked up criterion is：
S is communicated in the frequency spectrum resource under meeting the one-segment QoS requirement decision criteria of step 2 for D2D, according to
Value to frequency spectrum resource carry out positive sequence sequence；Wherein, s=1,2 ..., S；
In step 4, more D2D communication systems frequency spectrum resource allocation strategies are：
The frequency spectrum resource ordering scenario to be communicated according to each D2D, each round are followed successively by each D2D communications and are never communicated by the D2D
Optimal frequency range is chosen in the frequency range of selection, most forward frequency range in the optimal frequency range, that is, frequency spectrum resource sequence；
During selection frequency range every time, if the frequency range selected by D2D communications has reached the frequency range needed for relative users
Number, then the frequency range is sequentially placed into respective alternative frequency range set；If D2D communications are found when choosing the frequency range
The frequency range is communicated by other D2D and chooses, then using power consumption manner of comparison：Compare the two D2D communication users in the frequency
Meet the power consumption of D2D communications during minimum achievable rate threshold requirement in section, it is relatively low which is distributed to power consumption by base station
D2D communicates；
In the higher D2D communication users of the middle power consumption of power consumption, the most forward frequency that sorts in itself alternative frequency range set can be chosen
Duan Zuowei is compensated, if the most forward frequency range of the sequence still selected by other D2D communications, according to the power consumption manner of comparison with
Other D2D communication do power dissipation ratio compared with；Until all D2D communicate selection frequency range number reach each needed for frequency range sum require
Or all available frequency ranges have already been selected and finish, system stops distribution frequency spectrum resource.
2. more D2D communication resource allocation methods based on frequency spectrum resource distribution in heterogeneous network according to claim 1, its
It is characterized in that, in steps of 5, judges that can be distributed frequency spectrum resource meet sentencing for the D2D total achievable rate threshold requirements of communication
Fix, be：
<mfenced open = "{" close = "">
<mtable>
<mtr>
<mtd>
<mstyle>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>m</mi>
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<mn>1</mn>
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<mi>M</mi>
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<mi>R</mi>
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</mtd>
</mtr>
</mtable>
</mfenced>
Wherein, xsmTo represent frequency range m whether by the frequency allocation factor of D2D communication s selections, xsm={ 0,1 }；xsm=1 represents frequency
Section m is chosen by D2D communications s；xsm=0 represents that frequency range m is not chosen by D2D communications s；For total achievable rate of D2D communications s
Threshold requirement；NsThe frequency range sum for needing to choose altogether for D2D communications s；If above formula meets, then it represents that distributes to D2D communications s's
Frequency spectrum resource meets the total achievable rate threshold requirement of D2D communications.
3. more D2D communication resource allocation methods based on frequency spectrum resource distribution in heterogeneous network according to claim 2, its
It is characterized in that, in step 6, distributes D2D communications in an optimal manner using method of Lagrange multipliers in each selection frequency range
SINR targets, specific method are：
λ is found using dichotomy*, the λ*The λ brought into following formula meetsWherein, subscript snRepresent
Choose frequency range sn, choose frequency range snThat is n-th of frequency range that D2D communications s chooses；Represent the D2D under Lagrange multiplier λ
Communication s, which is assigned to, chooses frequency range snOn SINR targets, and need to meet：ForI.e.
Not less than D2D communications s minimum SINR threshold values in one-segmentMax (A, B) represents to take the greater in A, B；Wherein,
<mrow>
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<mi>&gamma;</mi>
<mrow>
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<mi>ss</mi>
<mi>n</mi>
</msub>
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<mi>D</mi>
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<mo>)</mo>
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<msub>
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<mi>&lambda;</mi>
<mo>)</mo>
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<msub>
<mi>X</mi>
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<mi>Z</mi>
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</mrow>
<mrow>
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<mi>X</mi>
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</mfrac>
</mrow>
<mfenced open = "{" close = "">
<mtable>
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<msub>
<mi>X</mi>
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<mi>ss</mi>
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<mi>g</mi>
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</mrow>
<mn>2</mn>
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<mi>&lambda;</mi>
</mrow>
</mtd>
</mtr>
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<mtd>
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<mi>Y</mi>
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<mi>ss</mi>
<mi>n</mi>
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<mn>2</mn>
<msubsup>
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<mrow>
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<msub>
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<mrow>
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<mrow>
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<mn>1</mn>
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</mrow>
</msubsup>
<msub>
<mi>N</mi>
<mn>0</mn>
</msub>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
Phone user s is represented respectivelynLink channel gain, the link channel of D2D communications s to base station increase
Benefit, phone user snLink channel gain, D2D communication s transmitting terminals to phone user s to D2D communication s receiving terminalsnReceiving terminal
Link channel gain；Represent phone user snMinimum SINR threshold values in one-segment；λ expression Lagrange multipliers, and λ >=
0；N0For system noise；Phone user snS in expression systemnA phone user；Phone user snUse selection frequency range sn。
4. more D2D communication resource allocation methods based on frequency spectrum resource distribution in heterogeneous network according to claim 3, its
It is characterized in that,Represent the power consumption of D2D communications s；
Can if the frequency spectrum resource that D2D communications s is assigned to meets the frequency spectrum resource distributed in step 5 meet that D2D communications always may be used
Up to the decision criteria of rate-valve value demand, then the power consumption expression formula of D2D communications s is as follows：
<mfenced open = "{" close = "">
<mtable>
<mtr>
<mtd>
<mrow>
<msubsup>
<mi>P</mi>
<mi>s</mi>
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</mrow>
<mi>D</mi>
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<mo>(</mo>
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</msup>
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</mrow>
<mo>-</mo>
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<mi>s</mi>
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</mrow>
</msubsup>
</mrow>
</mfrac>
<mo>.</mo>
<msub>
<mi>N</mi>
<mn>0</mn>
</msub>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
Wherein,Represent power consumptions of the D2D communications s on frequency range m；Represent the optimal Lagrange tried to achieve in step 6
Multiplier λ*Lower D2D communications s is assigned to the SINR targets on frequency range m；
Can if the frequency spectrum resource that D2D communications s is assigned to does not meet the frequency spectrum resource distributed in step 5 meet that D2D communications are total
The decision criteria of achievable rate threshold requirement, thenThat is D2D communications s cannot be established.
5. more D2D communication resource allocation methods based on frequency spectrum resource distribution in heterogeneous network according to claim 4, its
It is characterized in that, it is describedFor the total power consumption of whole D2D communication systems；
If Ps D＞ 0, s=1,2 ..., S, thenExpression formula be：
<mrow>
<msubsup>
<mi>P</mi>
<mrow>
<mi>t</mi>
<mi>o</mi>
<mi>t</mi>
<mi>a</mi>
<mi>l</mi>
</mrow>
<mi>D</mi>
</msubsup>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>s</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>S</mi>
</munderover>
<msubsup>
<mi>P</mi>
<mi>s</mi>
<mi>D</mi>
</msubsup>
<mo>;</mo>
</mrow>
Otherwise, P is returneds D, s=1,2 ..., S.
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| CN107548070B (en) * | 2016-06-27 | 2023-10-27 | 中兴通讯股份有限公司 | Data transmission method, device and system |
| CN107484245B (en) * | 2017-08-04 | 2019-09-17 | 东北大学 | The resource allocation methods of D2D communication are supported in a kind of heterogeneous network |
| CN107613556B (en) * | 2017-09-19 | 2020-03-17 | 西安交通大学 | Full-duplex D2D interference management method based on power control |
| CN111787605B (en) * | 2020-05-25 | 2022-06-28 | 中南林业科技大学 | Energy efficiency optimization method in energy acquisition D2D relay communication heterogeneous network |
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| 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 |
| CN104105158A (en) * | 2014-07-08 | 2014-10-15 | 西安交通大学 | Relay selection method based on D2D relay communication |
| CN104349462A (en) * | 2013-07-26 | 2015-02-11 | 华为技术有限公司 | Communication mode selection method and user equipment |
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| 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 |
| CN104349462A (en) * | 2013-07-26 | 2015-02-11 | 华为技术有限公司 | Communication mode selection method and user equipment |
| CN104105158A (en) * | 2014-07-08 | 2014-10-15 | 西安交通大学 | Relay selection method based on D2D relay communication |
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