CN104918257B - Relaying cooperation isomery cellular network D2D communication resource allocation methods - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/10—Dynamic resource partitioning
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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
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
- H04W52/0219—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave where the power saving management affects multiple terminals
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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
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a power saving command
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The present invention discloses a kind of relaying cooperation isomery cellular network D2D communication resource allocation methods, including acquiring when n-th of phone user takes Q (n) communication patterns, the attainable maximum achievable rate threshold value of D2D communications institute in n-th of frequency rangeAccording toJudge that can the frequency spectrum resource that D2D communications are chosen meet system service quality requirement；The achievable rate target that D2D communications are assigned in n-th of frequency range when n-th of phone user of co-allocation takes communication pattern Q (n)And determine the communication pattern Q (n) of n-th of phone user；Seek the total transmission power P of systemtotal.The present invention can optimize the communication pattern of each phone user in the optimal achievable rate target and determining system of the transmission power of phone user and D2D user, D2D user in each frequency range simultaneously.Compared to traditional resource allocation methods, this method can save the total power consumption of system while phone user and D2D user's achievable rate is ensured, can more meet the requirement of green communications.
Description
Technical field
The present invention relates to a kind of method of wireless communication technology field, specifically a kind of relaying cooperation isomery Cellular Networks
Network D2D (Device-to-Device) communication resource allocation method.
Background technology
In order to meet the demand of the multimedia equipment sharply increased and service to frequency spectrum resource and data rate, wireless network
Start evolution towards heterogeneous network.With the fast development of mobile communication, multimedia equipment is sharply increased with service so that small
Area's base station movement flow load exponential type rises, not only so that mobile network becomes congestion, while can also aggravate the energy consumption of equipment.
Real intermediate frequency spectrum resource is limited, and equipment energy consumption is limited, and how effectively increasing the availability of frequency spectrum, reducing energy consumption will be a research
Emphasis.
Traditional cellular communication modes have been difficult to efficiently solve the above problem, thus the concept of the D2D communication technologys in
It is introduced in LTE network within 2009.D2D communications can effectively be delayed by establishing the direct transmission link without base station
The mobile flow load of base station is solved, reduces the energy expenditure of mobile network.By the way that D2D communication users is allowed to be multiplexed the frequency of phone user
Spectrum resource, being capable of effectively performances such as lifting system handling capacity, spectrum efficiency using D2D short haul connection advantages.However, its
The interference problem of introducing is that wireless system primarily solves the problems, such as.Power control is to realize that isomery cellular network intermediate frequency spectrum resource is total to
A kind of key technology enjoyed, by the power for reasonably controlling phone user and D2D user so that when D2D communication access honeycombs
When user authorizes frequency range, D2D communications can not influence the interference generated each other with cellular communication the normal communication of other side.
In addition, introducing relay node in cell edge, it can effectively alleviate Cell Edge User and base station communication hardly possible
Problem, and the load of base station can be alleviated.With the development of relaying technique, and it is applied to current network more and more widely,
Equipment power dissipation can be significantly decreased, cell coverage area is improved, increases transmission rate etc..
The resource allocation methods taken in traditional isomery cellular network D2D communications, are largely built upon and only ensure
In the premise of single phone user's service quality (Quality of Service, QoS) or D2D communications QoS, to maximize
The targets such as the total rate or spectral multiplexing rate of D2D communications, at this time D2D communications need to remain maximum transmission power transmission number
According to.Obviously, so QoS that can not ensure phone user and D2D user simultaneously, is also unsatisfactory for the requirement of green communications.
Also some traditional cellular 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.
Phone user, D2D user, base station are included simultaneously and is relayed such a more moreover, few cellular networks meet
Layer heterogeneous network model.
Invention content
The uplink isomery cellular network mould that the present invention coexists for a base station, fixed relay, phone user and D2D user
Type, it is proposed that one kind is based on optimal power allocation and cellular subscriber communications pattern (base station communication mode or relaying cooperation pattern)
The resource allocation methods of selection.The present invention allows frequency spectrum resources of the single D2D to the multiple phone users of multiplexing, based on allocated
On frequency spectrum resource, while ensureing minimum achievable rate demand in phone user and D2D user's one-segment, to make full use of D2D
The advantage of short haul connection so that D2D user meets a total achievable rate threshold requirement on the frequency spectrum resource of all multiplexings,
By co-allocation D2D user, achievable rate target and cellular subscriber communications model selection are entire to optimize in each frequency range
The total power consumption of system.The present invention can optimize the transmission power of phone user and D2D user, D2D user in each frequency range simultaneously
On optimal achievable rate target and determining system in each phone user communication pattern.Compared to traditional resource allocation
Method, this method can save the total power consumption of system while phone user and D2D user's achievable rate is ensured, can more meet
The requirement of green communications.
The present invention is achieved by the following technical solutions.
According to a kind of relaying cooperation isomery cellular network D2D communication resource allocation methods provided by the invention, including as follows
Step：
Step 1：It obtainsWhereinIt represents when n-th of phone user takes communication pattern Q (n), D2D communications
The attainable maximum achievable rate threshold value of institute in n-th of frequency range；
Step 2：According toJudge that can the frequency spectrum resource that D2D communications are chosen meet system service quality requirement；
Step 3：D2D communications distribute in n-th of frequency range when n-th of phone user of co-allocation takes communication pattern Q (n)
The achievable rate target arrivedAnd determine the communication pattern Q (n) of n-th of phone user；
Step 4：Seek the total transmission power P of systemtotal。
Preferably, the step 3 specifically includes following sub-step：
Step 3.1：Initialize the initial communication pattern Q (n) of each phone user；
Step 3.2：Initialize λ1And λ2, and define weighting function wQ(n),n；
Step 3.3：Determine n-th of phone user in achievable rate targetUnder communication pattern Q (n)；
Step 3.4：Cycle solves achievable rate threshold targetsAnd the communication pattern Q (n) of n-th of phone user.
It is describedFor when n-th of phone user takes Q (n) communication patterns, D2D communications institute's energy in n-th of frequency range
The maximum achievable rate threshold value reached is acquired according to cellular communication in one-segment and the minimum achievable rate threshold requirement of D2D communicationsExpression formula is as follows：
Wherein, n=1,2 ..., N, N represent phone user's sum；ForCorresponding SINR, gd,Represent n-th of phone user using cellular link channel gain, D2D chains under communication pattern Q (n) respectively
Path channels gain, the link channel gain of phone user's n to D2D communication receivers, D2D transmitting terminals connect to n-th of phone user
The link channel gain of receiving end；Q (n)={ 1,2 }, Q (n)=1, Q (n)=2 represent that n-th of phone user is led to using base station respectively
Letter pattern, relaying cooperation pattern, and assume that n-th of phone user uses n-th of frequency range；To be adopted as n-th of phone user
During with communication pattern Q (n), minimum achievable rate threshold value of the D2D communications in n-th of frequency rangeCorresponding SINR, and n-th
Minimum achievable rate threshold value of the D2D communications in n-th of frequency range when a phone user uses relaying cooperation patternIt is n-th
Minimum achievable rate threshold value of the D2D communications in n-th of frequency range when phone user uses base station communication modeTwice,
Preferably, it is described in step 2, according toJudge that can the frequency spectrum resource that D2D communications are chosen meet system
The judgment criterion expression formula of QoS requirement is as follows：
If meeting above formula, show to meet QoS requirement；Wherein,Represent D2D communications in n-th of frequency range
Minimum achievable rate threshold value,Represent D2D communications maximum attainable total achievable rate in N number of frequency range of all multiplexings,Represent D2D communications total achievable rate threshold value in N number of frequency range of all multiplexings；It represents in different cellular communication moulds
Value maximum in bracket is chosen under formula Q (n).
Preferably, the initial communication pattern Q (n) for each phone user being initialized in the step 3.1 meets following criterion：
λ is initialized in the step 3.21And λ2Meet following criterion：Wherein, λ1、λ2
A respectively selected smaller, larger Lagrange multiplier；R (λ) is represented in λ
Under value, total achievable rate for being distributed in all N number of frequency ranges of D2D communications；Weight letter for definition
Number,It is distributed for D2D communications when taking cellular communication modes Q (n) based on n-th of phone user in n-th of frequency range
The achievable rate target arrived is the variable about Lagrange multiplier λ,Expression formula be：
Wherein,
Represent that n-th of phone user uses minimum SINR threshold values of the communication pattern Q (n) in n-th of frequency range, on
Mark -1 represents -1 power, N0Represent system noise；It is used under cellular communication modes Q (n) for n-th of phone user,
D2D allocation of communications to n-th of frequency range on SINR targets, be the variable about Lagrange multiplier λ, and need to meet：Wherein,For minimum achievable rate threshold value of the D2D communications in n-th of frequency rangeIt is corresponding
SINR value；It is respectively correspondingUnder Q (n), n-th of phone user, D2D user in n-th of frequency range
Optimal transmission power,Expression formula be：
N-th of phone user is in achievable rate threshold value in the step 3.3Under communication pattern Q (n) really
It fixes, is：
I.e. n-th of phone user is correspondingLower choose of value makes wQ(n),nIt is worth minimum communication pattern Q (n), wherein
Achievable rate threshold targets in the step 3.4And the communication pattern Q (n) of n-th of phone user is followed
Ring solves criterion：
IfCorresponding Q (n) is returned,λ*, and go to step 4；Otherwise, ifEnable λ2=λ, and return to step 3.3；IfEnable λ1=λ, and return to step 3.3；
R (λ) represented under λ value, total achievable rate for being distributed in all N number of frequency ranges of D2D communications；ε represents dichotomy
Precision；It represents when n-th of phone user takes communication pattern Q (n), D2D communications divide in n-th of frequency range
The optimal achievable rate threshold value matched, is about Lagrange multiplier λ*Variable；λ*Represent the optimal glug for stopping obtaining during cycle
Bright day multiplier.
The PtotalFor the total transmission power of system, expression formula is：
Wherein,WithIt is illustrated respectively in obtained best Lagrange multiplier λ*Under Q (n),
The optimal transmission power of n-th of phone user, D2D user in n-th of frequency range.
Compared with prior art, the present invention has following advantageous effect：
The present invention can optimize the transmission power of phone user and D2D user, D2D user in each frequency range most simultaneously
The communication pattern of each phone user in eukodal rate target and determining system.Compared to traditional resource allocation methods,
This method can save the total power consumption of system while phone user and D2D user's achievable rate is ensured, can more meet green
The requirement of communication.
Description of the drawings
Fig. 1 is flow chart of the present invention；
Fig. 2 is the present invention in the total achievable rate demand of D2D communicationsIt is entire when increasing to 46bps/Hz from 30bps/Hz
System power dissipation and D2D communication power consumption figures；
Fig. 3 is for the present invention in D2D communication distances from system when increasing to 30 meters for 10 meters and D2D communication power consumption figures；
Fig. 4 for the present invention based on the phone user's group being stepped up to base station distance from group 1 to the single-frequency of group 10
System is averaged total power consumption figure in section.
Specific embodiment
It elaborates 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
It puts and is 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 D2D Resource Allocation Formulas based on relaying cooperation and power control, and system noise is spectral density
It is the zero-mean additive white Gaussian noise of -174dBm/Hz, the distance for being relayed to base station is 400 meters, and channel model considers simple
Path loss model：G=d-α.Wherein, g represent channel gain, d represent distance, α represent the weak index in path, here choose α=
3。
The present embodiment includes the following steps：
Step 1：It obtainsWhereinIt represents when n-th of phone user takes communication pattern Q (n), D2D communications
The attainable maximum achievable rate threshold value of institute in n-th of frequency range, it is minimum reachable according to cellular communication in one-segment and D2D communications
It is as follows that rate-valve value demand acquires its expression formula：
Wherein, n=1,2 ..., N, N represent phone user's sum；ForCorresponding SINR, gd,Represent n-th of phone user using honeycomb chain under communication pattern Q (n) respectively
Path channels gain, D2D link channel gains, the link channel gain of n-th of phone user to D2D communication receivers, D2D are sent
Hold the link channel gain to n-th of phone user's receiving terminal；Q (n)={ 1,2 }, Q (n)=1, Q (n)=2 represent n-th respectively
A phone user assumes that n-th of phone user uses n-th of frequency range using base station communication mode, relaying cooperation pattern；
For when n-th phone user uses communication pattern Q (n), D2D communicates the minimum achievable rate threshold value in n-th of frequency rangeCorresponding SINR, and n-th of phone user can using minimum of the D2D communications in n-th of frequency range during relaying cooperation pattern
Up to rate-valve valueIt is that minimum of the D2D communications in n-th of frequency range is reachable when n-th of phone user uses base station communication mode
Rate-valve valueTwice,
Step 2：According toJudge that can the frequency spectrum resource that D2D communications are chosen meet system service quality requirement,
Judgment criterion is：
If meeting above formula, show to meet QoS requirement；Wherein,Represent D2D communications in n-th of frequency range
Minimum achievable rate threshold value,Represent that D2D communications are maximum attainable total up to speed in N number of frequency range of all multiplexings
Rate,Represent D2D communications total achievable rate threshold value in N number of frequency range of all multiplexings；Expression is led in different honeycombs
Value maximum in bracket is chosen under letter pattern Q (n).
Step 3：D2D communications distribute in n-th of frequency range when n-th of phone user of co-allocation takes communication pattern Q (n)
The achievable rate target arrivedAnd determine the communication pattern Q (n) of n-th of phone user, including sub-step specific as follows
Suddenly：
Step 3.1：The initial communication pattern Q (n) of each phone user is initialized, needs the following institute of criterion met
Show：
Step 3.2：Initialize λ1And λ2, and define weighting function wQ(n),n, λ1And λ2Initialization criterion it is as follows：Wherein, λ1、λ2Respectively selected one smaller, a larger Lagrange multiplies
Son；R (λ) represented under λ value, total achievable rate for being distributed in all N number of frequency ranges of D2D communications；For the weighting function of definition,N-th of bee is based in n-th of frequency range for D2D communications
Nest user takes the achievable rate target being assigned to during cellular communication modes Q (n), is the variable about Lagrange multiplier λ,Expression formula be：
Wherein,
Represent that n-th of phone user uses minimum SINR threshold values of the communication pattern Q (n) in n-th of frequency range, on
Mark -1 represents -1 power, N0Represent system noise；It is used under cellular communication modes Q (n) for n-th of phone user,
D2D allocation of communications to n-th of frequency range on SINR targets, be the variable about Lagrange multiplier λ, and need to meet：Wherein,For minimum achievable rate threshold value of the D2D communications in n-th of frequency rangeIt is corresponding
SINR value；It is respectively correspondingUnder Q (n), n-th of phone user, D2D user in n-th of frequency range
Optimal transmission power,Expression formula be：
Step 3.3：Determine n-th of phone user in achievable rate threshold valueUnder communication pattern Q (n), really
It fixes, is：
I.e. n-th of phone user is correspondingLower choose of value makes wQ(n),nIt is worth minimum communication pattern Q (n), wherein
Step 3.4：Cycle solves achievable rate threshold targetsAnd the communication pattern Q (n) of n-th of phone user,
Its cycle criterion is：
IfCorresponding Q (n) is returned,λ*, and go to step 4；Otherwise, ifEnable λ2=λ, and return to step 3.3；IfEnable λ1=λ, and return to step 3.3；
R (λ) represented under λ value, total achievable rate for being distributed in all N number of frequency ranges of D2D communications；ε represents dichotomy
Precision；It represents when n-th of phone user takes communication pattern Q (n), D2D communications divide in n-th of frequency range
The optimal achievable rate threshold value matched, is about Lagrange multiplier λ*Variable；λ*Represent the optimal glug for stopping obtaining during cycle
Bright day multiplier.
Step 4：Seek the total transmission power P of systemtotal, PtotalExpression formula it is as follows：
In the present embodiment, Fig. 2 is optimal case, suboptimal design and justice based on the total achievable rate threshold value of D2D communications
The power consumption that property scheme obtains.Wherein, optimal case is the present embodiment method；Suboptimal design is a kind of feelings of the present embodiment method
Condition, i.e., all phone users take base station communication mode；Fairness scheme is to divide equally D2D as far as possible in each frequency range to lead to
Total achievable rate threshold requirement of letter；Fig. 3 is that the optimal case based on D2D communication distances, suboptimal design and fairness scheme obtain
The power consumption arrived.By Fig. 2 and Fig. 3 as it can be seen that this embodiment scheme performance is significantly larger than suboptimal design and fairness scheme.Fig. 4 is base
System is average total in the one-segment obtained in the phone user's group being stepped up to base station distance in optimal case and suboptimal design
Power consumption.The distance of s-th of phone user's group to base station is (50 (s-1), 50s) rice.It can be energy saving from relaying cooperative approach power consumption
It is found in chart of percentage comparison, is in frequency range where this embodiment scheme can greatly reduce relay node surrounding cells user group
System total power consumption.
Specific embodiments of the present invention are 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 (2)
1. a kind of relaying cooperation isomery cellular network D2D communication resource allocation methods, which is characterized in that including following specific step
Suddenly：
Step 1：It obtainsWhereinIt represents when n-th of phone user takes communication pattern Q (n), D2D communicates the
The attainable maximum achievable rate threshold value of institute in n frequency range；N=1,2, N, N represent phone user's sum；
Step 2：According toJudge that can the frequency spectrum resource that D2D communications are chosen meet system service quality requirement；
Step 3：D2D communications are assigned in n-th of frequency range when n-th of phone user of co-allocation takes communication pattern Q (n)
Achievable rate targetAnd determine the communication pattern Q (n) of n-th of phone user；
Step 4：Seek the total transmission power P of systemtotal；
It is acquired according to cellular communication in one-segment and the minimum achievable rate threshold requirement of D2D communicationsExpression formula is as follows：
Wherein,ForCorresponding SINR, N-th of bee is represented respectively
Nest user uses cellular link channel gain, D2D link channel gains, n-th of phone user under communication pattern Q (n) to lead to D2D
Believe the link channel gain of receiving terminal, the link channel gain of D2D transmitting terminals to n-th of phone user's receiving terminal；Q (n)=1,
2 }, Q (n)=1, Q (n)=2 represent n-th phone user using base station communication mode, relaying cooperation pattern respectively, and assume the
N phone user uses n-th of frequency range；For when n-th of phone user uses communication pattern Q (n), D2D communicates n-th
Minimum achievable rate threshold value in a frequency rangeCorresponding SINR, and when n-th phone user uses relaying cooperation pattern
Minimum achievable rate threshold value of the D2D communications in n-th of frequency rangeWhen being that n-th of phone user uses base station communication mode
Minimum achievable rate threshold value of the D2D communications in n-th of frequency rangeTwice,
In step 2, can judge the frequency spectrum resource of D2D communication selections meet the judgment criterion expression of system service quality requirement
Formula is as follows：
If meeting above formula, show to meet QoS requirement；Wherein,Represent minimum of the D2D communications in n-th of frequency range
Achievable rate threshold value,Represent D2D communications maximum attainable total achievable rate in N number of frequency range of all multiplexings,
Represent D2D communications total achievable rate threshold value in N number of frequency range of all multiplexings；It represents in different cellular communication modes Q
(n) value maximum in bracket is chosen under；
The step 3 specifically comprises the following steps：
Step 3.1：The initial communication pattern Q (n) of each phone user is initialized, the initialization criterion of Q (n) is：
Step 3.2：Initialize λ1And λ2, λ1、λ2A respectively selected smaller, larger Lagrange multiplier,
And define weighting function wQ(n),n：
Wherein, λ represents Lagrange multiplier；
Initialize λ1And λ2Meet following criterion：Wherein,R(λ)
It represents under λ value, total achievable rate that D2D communications distribute in all N number of frequency ranges；It is that D2D communicates in n-th of frequency
The achievable rate target being assigned to during cellular communication modes Q (n) is taken based on n-th of phone user in section, is bright about glug
The variable of day multiplier λ,Expression formula be：
Wherein,
Represent n-th of phone user using minimum SINR threshold values of the communication pattern Q (n) in n-th of frequency range, -1 table of subscript
Show -1 power, N0Represent system noise；It is that n-th of phone user is used under cellular communication modes Q (n), D2D communications
The SINR targets in n-th of frequency range being assigned to, are the variables about Lagrange multiplier λ, and need to meet：Wherein,For minimum achievable rate threshold value of the D2D communications in n-th of frequency rangeIt is corresponding
SINR value；It is respectively correspondingUnder Q (n), n-th of phone user, D2D user in n-th of frequency range
Optimal transmission power,Expression formula be：
Step 3.3：Determine n-th of phone user in achievable rate targetUnder communication pattern Q (n), Q (n) is really
It fixes, is：
I.e. n-th of phone user is correspondingLower choose of value makes wQ(n),nIt is worth minimum communication pattern Q (n), wherein
Step 3.4：Cycle solves achievable rate threshold targetsAnd the communication pattern Q (n) of n-th of phone user, cycle
Criterion is：
IfCorresponding Q (n) is returned,λ*, and go to step 4；Otherwise, if
Enable λ2=λ, and return to step 3.3；IfEnable λ1=λ, and return to step 3.3；
R (λ) represented under λ value, total achievable rate for being distributed in all N number of frequency ranges of D2D communications；ε represents the precision of dichotomy；It represents when n-th of phone user takes communication pattern Q (n), D2D communications are distributed most in n-th of frequency range
Eukodal rate-valve value is about Lagrange multiplier λ*Variable；λ*The optimal Lagrange for representing to stop obtaining during cycle multiplies
Son.
2. relaying cooperation isomery cellular network D2D communication resource allocation methods according to claim 1, which is characterized in that
PtotalFor the total transmission power of system, expression formula is：
Wherein,WithIt is illustrated respectively in obtained best Lagrange multiplier λ*Under Q (n), n-th
The optimal transmission power of n-th of phone user, D2D user in frequency range.
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| CN106170140A (en) * | 2016-08-31 | 2016-11-30 | 电子科技大学 | A kind of D2D cooperation transmission method minimizing system power dissipation |
| CN107071887B (en) * | 2017-03-07 | 2019-11-12 | 重庆邮电大学 | The online Poewr control method of small cell in a kind of energy acquisition isomery cellular network |
| CN107465479A (en) * | 2017-04-14 | 2017-12-12 | 重庆信科设计有限公司 | A kind of multiple cell D2D Communication Jamming management methods assisted based on relaying |
| CN107347187B (en) * | 2017-06-16 | 2020-01-07 | 厦门大学 | Energy consumption optimization method for D2D link under non-full-time sharing condition |
| CN110049473B (en) * | 2019-04-18 | 2021-08-10 | 电子科技大学 | Joint wireless channel allocation and power control method for relay enhanced D2D communication |
| CN110290510A (en) * | 2019-05-07 | 2019-09-27 | 天津大学 | Support the edge cooperation caching method under the hierarchical wireless networks of D2D communication |
| CN110621007B (en) * | 2019-08-30 | 2022-12-16 | 凯里学院 | Multi-cell D2D spectrum resource allocation method |
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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 |
| CN103533529A (en) * | 2013-10-15 | 2014-01-22 | 北京邮电大学 | Resource reuse method and system for improving energy efficiency of D2D (device-to-device) system |
| CN104105158A (en) * | 2014-07-08 | 2014-10-15 | 西安交通大学 | Relay selection method based on D2D relay communication |
-
2015
- 2015-05-08 CN CN201510233567.8A patent/CN104918257B/en not_active Expired - Fee Related
Patent Citations (3)
| 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 |
| CN103533529A (en) * | 2013-10-15 | 2014-01-22 | 北京邮电大学 | Resource reuse method and system for improving energy efficiency of D2D (device-to-device) system |
| CN104105158A (en) * | 2014-07-08 | 2014-10-15 | 西安交通大学 | Relay selection method based on D2D relay communication |
Non-Patent Citations (2)
| Title |
|---|
| Mode Selection for Device-to-Device (D2D);Ziyang Liu et al.;《Communications (ICC)》;20120615;全文 * |
| Resource Sharing of Underlaying Device-to-Device and;Jiaheng Wang et al.;《IEEE Communications Letters》;20130430;第17卷(第6期);全文 * |
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