CN104581867B - The data distributing method with fairness and energy-saving effect of D2D collaboration communications is utilized under the transmission of data blocks time such as a kind of - Google Patents

The data distributing method with fairness and energy-saving effect of D2D collaboration communications is utilized under the transmission of data blocks time such as a kind of Download PDF

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CN104581867B
CN104581867B CN201510020752.9A CN201510020752A CN104581867B CN 104581867 B CN104581867 B CN 104581867B CN 201510020752 A CN201510020752 A CN 201510020752A CN 104581867 B CN104581867 B CN 104581867B
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data block
user
transmission
data
step
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CN201510020752.9A
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CN104581867A (en
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吴远
陈佳超
何艳飞
钱丽萍
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浙江工业大学
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks
    • Y02D70/20Techniques for reducing energy consumption in wireless communication networks independent of Radio Access Technologies
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks
    • Y02D70/30Power-based selection of communication route or path
    • Y02D70/39Power-based selection of communication route or path using selective relaying for reaching a BTS [Base Transceiver Station] or an access point

Abstract

Using the data distributing method with fairness and energy-saving effect of D2D collaboration communications under the transmission of data blocks time such as a kind of, comprise the following steps:(1) it is directed to problem, the distribution of complete paired data block in the case where waiting transmission of data blocks time, at the same time compared to each user respectively since the mode of base station downloading data block reaches energy saving effect, also take into account the fairness of user, the transmission of data blocks time is given into each user for meeting relay condition, design method obtains the transmission time of data block and the transmission rate of data block.(2) determine the restrictive condition needed to be considered in data dissemination process, design the data distributing method under data-oriented block transmission time and transmission rate for restrictive condition, be finally completed the transmission to data block.While the present invention takes into account fair principle energy-saving effect is carried by what transmission of data blocks time control and corresponding user's relay selection and relaying time controlled.

Description

Under the transmission of data blocks time such as a kind of using D2D collaboration communications with fairness and The data distributing method of energy-saving effect

Technical field

The present invention relates in the D2D communications fields, D2D collaboration communications are utilized under especially a kind of etc. transmission of data blocks time Data distributing method with fairness and energy-saving effect.

Background technology

In recent years, as the explosive growth of mobile data traffic demand, the distribution of limited Internet resources are also faced with huge Big challenge, in this context, the D2D communication patterns that can be multiplexed legacy network resource have been to be concerned by more and more people.With this Meanwhile with the popularization of network, social networks has become a kind of indispensable manner of intercourse of people, in social networks, People can realize the data block resource shared including various pictures, film etc..And in same place (such as office building Office, classroom etc.) people significantly overlapped for being had on the hobby of social network content, utilize D2D communication modes realize the collaborative distribution for the data block for having joint demand to like to people, are a kind of very novel applications Pattern.This pattern is more bonded social demand instantly, with stronger purpose, and more efficient performance.Therefore, The collaborative distribution to the data block of user's joint demand, same phase are realized in research while how taking into account user fairness principle It is respectively significantly since the mode of base station downloading data block reaches energy saving effect compared with user.

The content of the invention

In order to overcome, traditional D2D communication patterns lack application experience well, energy consumption is larger and lacks public to a certain degree The deficiency of levelling measure, the present invention provide it is a kind of with applications well experience, energy consumption is smaller, fairness is good etc., and data block passes The data distributing method with fairness and energy-saving effect of D2D collaboration communications is utilized under the defeated time.

The technical solution adopted by the present invention to solve the technical problems is:

The data distribution with fairness and energy-saving effect of D2D collaboration communications is utilized under the transmission of data blocks time such as a kind of Method, the data distributing method comprise the following steps:

(1) in the communication network based on D2D, haveA user, N are total number of users,A data block, K are total data block number, wherein, the demand user group of data block k is Ωk,The transmission time of data block k is xk, the size of data block k is Lk, the unit transmission time of data block k is vk, data The number of dividing equally of block is S, and the required set of data blocks of user i is combined into Ui, base station needs to complete to K in single timeslice T The transmission of data block, by the transmission time x of data block k before data distributionkIt is v to be divided into S parts of every part of transmission timesk, meet The trunk subscriber for having energy-saving effect condition judges whether to meet transmission v in orderkTime, until user's utilisable energy exhaust or Person is unsatisfactory for transmission condition, finally determines that the user for being chosen as relaying is to the relaying time of data block kBase station starts to count After transmission, the user for being chosen as relaying existsReceive and be broadcast to immediately while coming from base station data block k with being somebody's turn to do in time Trunk subscriber is in same user group ΩkOther users, finally, if the transmission time x of data block kkIt can be selected by all Still there is residue after the relaying of family, i.e.,ThenTransmission time it is direct by base station User's broadcast transmission data are completed;For the problem, transmission of data blocks time xkSpecifically obtained by following steps:

Step 1.1:Base station is all equal to the transmission time of K data block in single timeslice T, therefore, for data The transmission time x of block kkHave,Wherein, xkRepresent the transmission time of data block k, k represents data block setIn K-th of data block, K represent the total number of data block, and T represents single time leaf length;

Step 1.2:For data block k, the transmission time x obtained according to step 1.1k, its transmission rate RkHave,Wherein, RkRepresent the transmission rate of data block k, LkRepresent the size of data block k;

(2) method according to (1), exists for the user for being chosen as relayingReceived in time and come from base station number It is broadcast to immediately while according to block k and is in same user group Ω with the trunk subscriberkThe process of his interior user, consideration are based on D2D Collaboration communication realizes the restrictive condition of the process, and the restrictive condition includes herein below:

Trunk subscriber times of the user i as data block kTransmission time x no more than data block kk, i.e.,:

Energy of the user i in data procedures needed for the relay forwarding of complete paired data block k and reception cannot More than its utilisable energyWherein user i is that power needed for its required data block k is forwarded to isCorresponding to energy consumption isUser i is reception Power is received needed for data block k isCorresponding to energy consumption isTherefore i.e.:

User i in the trunk subscriber as data block k transmit power no more than its maximum transmit powerIt is no Then user i cannot be selected as relaying, i.e.,:

Wherein, function

In above-mentioned restrictive condition, each parameter definition is as follows:

i:User i;

qi:User i is sending circuit power consumption during data block;

Rk:The transmission rate of data block k;

xk:The transmission time of data block k;

n:Channel background noise;

gij:Channel gain between user i and user j;

User i receives the reception power during data block k;

User i is chosen as after relaying for the sending time of data block k;

User's i maximum available energies;

User's i maximum transmit powers;

Ωk:Gather for the data block k users for having demand;

Ui:The data block set of user's i demands;

According to the restrictive condition, described in (1) under method data-oriented block transmission time, user is selected as relaying While also to take into account the fairness of each user in user group to data block k demands so that energy consumption is equal as far as possible Assign to and meet in the user of relay condition, i.e., on the premise of energy-saving effect is reached, during selection user as much as possible is used as After to belonging to set omegakOther users carry out the distribution of data block k, step includes:

Step 2.1:Make tRk=xk,W=0, wherein, tRkTable Show and complete the residue transmission time that data block k completes transmission, ERiRepresent the remaining utilisable energy of user i, w represents θIn i, k corresponds to ERi=0, tRk=0 or user i is unsatisfactory for transmit powerNumber;

Step 2.2:Considering transmission of data blocks speed and including base station to user, user to user in interior channel circumstance Under factor, defined variableCalculate to correspond to for all data block k and belong to set omegakUnder interior all users

Step 2.3:It is all by what is calculated in step 2.2It is ranked up from small to large, it is specific as follows:

Wherein,RepresentArrange from small to large ArrangeIt is a, wherein, θ is representedNumber;

Step 2.4:By data block k transmission times xkS parts are divided into, evenWherein, vkRepresent data block k's Unit transmission timeslice, S represent transmission of data blocks time xkDivide equally number;

Step 2.5:If θ=0,Skip to step 2.8;Otherwise l=1 is made, wherein, l represents currentSequence number;

Step 2.6:Obtained for step 2.3According to In i, k obtains corresponding ERiAnd tRkIf judge ERi=0, tRk=0, Then w=w+1 skips to step 2.7;Otherwise judgeAt the same timeIf so, then tRk=tRk-vk, if it is not, then w=w+1 skips to step 2.7;

Step 2.7:If w=θ, skip to step 2.8, otherwise make l=l+1, if l>θ, then make l=1, w=0 simultaneously skip to step Rapid 2.6, otherwise jump directly to step 2.6;

Step 2.8:For data block k, if still havingTransmission time it is remaining, then residue transmission time Directly broadcasted by base station;

Step 2.9:Output:Transmission times of the user i to data block k

The present invention technical concept be:First, with reference to D2D communications and the respective advantages characteristic of social networks, data are being waited The distribution of complete paired data block under block transmission time, while compared to each user respectively since the mode of base station downloading data block Reach energy saving effect, also take into account the fairness of user to a certain extent on this basis, i.e., by the transmission of data blocks time Each user for meeting relay condition is given as much as possible.For the problem, design method obtains the transmission time of data block And the transmission rate of data block.Secondly, determine the restrictive condition needed to be considered in data dissemination process, set for restrictive condition Count the data distributing method under data-oriented block transmission time and transmission rate.Realize and take into account public affairs under D2D collaboration communications The data realized by transmission of data blocks time control and corresponding user's relay selection and relaying time control of levelling principle Distribution, while respectively since base station, downloading data block mode reaches energy saving effect compared to user.

Beneficial effects of the present invention are mainly manifested in:1st, for base station, by using the advantage of D2D communications, realize Multiplexing to legacy network resource, can reduce the traffic load of base station well;2nd, for a user, by with based on The communication mode of the cooperation among users of D2D, also reaches the benefit for saving flow rate, based on public affairs while data resource is obtained The principle of levelling, for trunk subscriber, the energy penalty that relay processes are paid also is reduced as much as possible;3rd, for whole For a system, in a manner of rational user collaboration, effectively reach the energy consumption purpose for controlling whole data block distribution procedure;4th, it is tight Close combination today's society demand hot spot, it is ingenious to utilize social networks characteristic, realize the efficient utilization of data resource.

Brief description of the drawings

Fig. 1 is the data block dissemination system schematic diagram based on D2D collaboration communications.

Embodiment

The present invention is described in further detail below in conjunction with the accompanying drawings.

With reference to Fig. 1, using D2D collaboration communications with fairness and energy-saving effect under the transmission of data blocks time such as a kind of Data distributing method, carrying out this method can meet each user fair principle taking into account trunk subscriber under data block demand Meanwhile the distribution of data block is completed based on D2D collaboration communications, while compared to each user respectively since base station downloading data block Mode reach energy saving effect.Data distribution systems (as shown in Figure 1) of the invention based on D2D collaboration communications.Based on D2D In the data distribution systems of collaboration communication, D2D user using common interest demand in social networks as background, by D2D modes into Row collaboration communication, devises and takes into account fair principle and the data point method with energy-saving effect, effectively increases the profit of resource With rate, the load of base station is reduced.For the data distribution systems based on D2D collaboration communications, propose to consider fair principle base On plinth using by transmission of data blocks time control and selection user as data distribution relaying and its as in a manner of relaying time, The distribution to required user of data block is completed, and carries energy-saving effect, the data distributing method comprises the following steps:

(1) in the communication network based on D2D, haveA user, N are total number of users,A data block, K are total data block number, wherein, the demand user group of data block k is Ωk,The transmission time of data block k is xk, the size of data block k is Lk, the unit transmission time of data block k is vk, data The number of dividing equally of block is S, and the required set of data blocks of user i is combined into Ui, base station needs to complete to K in single timeslice T The transmission of data block, by the transmission time x of data block k before data distributionkIt is v to be divided into S parts of every part of transmission timesk, meet The trunk subscriber for having energy-saving effect condition judges whether to meet transmission v in orderkTime, until user's utilisable energy exhaust or Person is unsatisfactory for transmission condition, finally determines that the user for being chosen as relaying is to the relaying time of data block kBase station starts data After transmission, the user for being chosen as relaying existsReceive in time be broadcast to immediately while coming from base station data block k with this Same user group Ω is in after userkOther users, finally, if the transmission time x of data block kkPassing through all optional users Still there is residue after relaying, i.e.,ThenTransmission time it is directly right by base station User's broadcast transmission data are completed;For the problem, transmission of data blocks time xkSpecifically obtained by following steps:

Step 1.1:Base station is all equal to the transmission time of K data block in single timeslice T, therefore, for data The transmission time x of block kkHave,Wherein, xkRepresent the transmission time of data block k, k represents data block setIn K-th of data block, K represent the total number of data block, and T represents single time leaf length;

Step 1.2:For data block k, the transmission time x obtained according to step 1.1k, its transmission rate RkHave,Wherein, RkRepresent the transmission rate of data block k, LkRepresent the size of data block k;

(2) method according to (1), exists for the user for being chosen as relayingReceived in time and come from base station number It is broadcast to immediately while according to block k and is in same user group Ω with the trunk subscriberkThe process of his interior user, consideration are based on D2D Collaboration communication realizes the restrictive condition of the process, and the restrictive condition includes herein below:

Trunk subscriber times of the user i as data block kTransmission time x no more than data block kk, i.e.,:

Energy of the user i in data procedures needed for the relay forwarding of complete paired data block k and reception No more than its utilisable energyWherein user i is that power needed for its required data block k is forwarded to isCorresponding to energy consumption isUser i is reception Power is received needed for data block k isCorresponding to energy consumption isTherefore i.e.:

User i in the trunk subscriber as data block k transmit power no more than its maximum transmit powerIt is no Then user i cannot be selected as relaying, i.e.,:

Wherein, function

In above-mentioned restrictive condition, each parameter definition is as follows:

i:User i;

qi:User i is sending circuit power consumption during data block;

Rk:The transmission rate of data block k;

xk:The transmission time of data block k;

n:Channel background noise;

gij:Channel gain between user i and user j;

User i receives the reception power during data block k;

User i is chosen as after relaying for the sending time of data block k;

User's i maximum available energies;

User's i maximum transmit powers;

Ωk:Gather for the data block k users for having demand;

Ui:The data block set of user's i demands;

According to the restrictive condition, described in (1) under method data-oriented block transmission time, user is selected as relaying While also to take into account the fairness of each user in user group to data block k demands so that energy consumption is equal as far as possible Assign to and meet in the user of relay condition, i.e., on the premise of energy-saving effect is reached, during selection user as much as possible is used as After to belonging to set omegakOther users carry out the distribution of data block k, step includes:

Step 2.1:Make tRk=xk,W=0, wherein, tRkTable Show and complete the residue transmission time that data block k completes transmission, ERiRepresent the remaining utilisable energy of user i, w represents θIn i, k corresponds to ERi=0, tRk=0 or user i is unsatisfactory for transmit powerNumber;

Step 2.2:Considering transmission of data blocks speed and including base station to user, user to user in interior channel circumstance Under factor, defined variableCalculate to correspond to for all data block k and belong to set omegakUnder interior all users

Step 2.3:It is all by what is calculated in step 2.2It is ranked up from small to large, it is specific as follows:

Wherein,RepresentArrange from small to large ArrangeIt is a, wherein, θ is representedNumber;

Step 2.4:By data block k transmission times xkS parts are divided into, evenWherein, vkRepresent data block k's Unit transmission timeslice, S represent transmission of data blocks time xkDivide equally number;

Step 2.5:If θ=0,Skip to step 2.8;Otherwise l=1 is made, wherein, l represents currentSequence number;

Step 2.6:Obtained for step 2.3According to In i, k obtains corresponding ERiAnd tRkIf judge ERi=0, tRk= 0, then w=w+1 skip to step 2.7;Otherwise judgeAt the same timeIf so, then tRk=tRk-vk, if it is not, then w=w+1 skips to step 2.7;

Step 2.7:If w=θ, skip to step 2.8, otherwise make l=l+1, if l>θ, then make l=1, w=0 simultaneously skip to step Rapid 2.6, otherwise jump directly to step 2.6;

Step 2.8:For data block k, if still havingTransmission time it is remaining, then residue transmission time Directly broadcasted by base station;

Step 2.9:Output:Transmission times of the user i to data block k

The present embodiment is conceived to today's society hot spot demand, and the characteristic advantage of ingenious combination social networks, is cooperated based on D2D Communication, while taking into account fair principle between trunk subscriber, passes through transmission of data blocks time control and corresponding user relays choosing Select and the mode of relaying time control realizes data distribution, finally compared to each user respectively since base station downloading data block Mode reaches energy saving effect.Our work can make Virtual network operator obtain more interests, service more users, So that user saves corresponding discharge rate while achieving the purpose that to obtain data resource, the utilization of data resource is effectively increased Rate, it is final to enable Virtual network operator and user's two-win.

Claims (1)

1. the data distribution side with fairness and energy-saving effect of D2D collaboration communications is utilized under the transmission of data blocks time such as a kind of Method, it is characterised in that:The data distributing method comprises the following steps:
(1) in the communication network based on D2D, haveA user, N are total number of users,A data block, K are total data block number, wherein, the demand user group of data block k is Ωk,The transmission time of data block k is xk, the size of data block k is Lk, the unit transmission time of data block k is vk, data The number of dividing equally of block is S, and the required set of data blocks of user i is combined into Ui, base station needs to complete to K in single timeslice T The transmission of data block, by the transmission time x of data block k before data distributionkIt is v to be divided into S parts of every part of transmission timesk, meet The trunk subscriber for having energy-saving effect condition judges whether to meet transmission v in orderkTime, until user's utilisable energy exhaust or Person is unsatisfactory for transmission condition, finally determines that the user for being chosen as relaying is to the relaying time of data block kBase station starts to count After transmission, the user for being chosen as relaying existsReceive and be broadcast to immediately while coming from base station data block k with being somebody's turn to do in time Trunk subscriber is in same user group ΩkOther users, finally, if the transmission time x of data block kkIt can be selected by all Still there is residue after the relaying of family, i.e.,ThenTransmission time it is direct by base station User's broadcast transmission data are completed;Transmission of data blocks time xkSpecifically obtained by following steps:
Step 1.1:Base station is all equal to the transmission time of K data block in single timeslice T, therefore, for data block k's Transmission time xkHave,Wherein, xkRepresent the transmission time of data block k, k represents data block setIn k-th number According to block, K represents the total number of data block, and T represents single time leaf length;
Step 1.2:For data block k, the transmission time x obtained according to step 1.1k, its transmission rate RkHave, Wherein, RkRepresent the transmission rate of data block k, LkRepresent the size of data block k;
(2) method according to (1), exists for the user for being chosen as relayingReceived in time and come from base station data It is broadcast to immediately while block k and is in same user group Ω with the trunk subscriberkThe process of his interior user, considers to assist based on D2D Make the restrictive condition that the process is realized in communication, the restrictive condition includes herein below:
Trunk subscriber times of the user i as data block kTransmission time x no more than data block kk, i.e.,:
Energy of the user i in data procedures needed for the relay forwarding of complete paired data block k and reception cannot More than its utilisable energyWherein user i is that power needed for its required data block k is forwarded to isCorresponding to energy consumption isUser i is to connect Receiving reception power needed for data block k isCorresponding to energy consumption isTherefore i.e.:
User i in the trunk subscriber as data block k transmit power no more than its maximum transmit powerOtherwise use Family i cannot be selected as relaying, i.e.,:
Wherein, function
In above-mentioned restrictive condition, each parameter definition is as follows:
i:User i;
qi:User i is sending circuit power consumption during data block;
Rk:The transmission rate of data block k;
xk:The transmission time of data block k;
n:Channel background noise;
gij:Channel gain between user i and user j;
User i receives the reception power during data block k;
User i is chosen as after relaying for the sending time of data block k;
User's i maximum available energies;
User's i maximum transmit powers;
Ωk:Gather for the data block k users for having demand;
Ui:The data block set of user's i demands;
According to the restrictive condition, described in (1) under method data-oriented block transmission time, user is selected as the same of relaying When also to take into account the fairness of each user in user group to data block k demands so that energy consumption is assigned to as far as possible Meet in the user of relay condition, i.e., on the premise of energy-saving effect is reached, selection user as much as possible is as relaying pair Belong to set omegakOther users carry out the distribution of data block k, step includes:
Step 2.1:Make tRk=xk,W=0, wherein, tRkRepresent to complete Data block k completes the residue transmission time of transmission, ERiRepresent the remaining utilisable energy of user i, w represents θIn i, k corresponds to ERi=0, tRk=0 or user i is unsatisfactory for transmit powerNumber;
Step 2.2:Considering transmission of data blocks speed and including base station to user, user to user in interior channel circumstance factor Under, defined variableCalculate to correspond to for all data block k and belong to set omegakUnder interior all users
Step 2.3:It is all by what is calculated in step 2.2It is ranked up from small to large, it is specific as follows:
Wherein,RepresentIs arranged from small to largeIt is a, wherein, θ is representedNumber;
Step 2.4:By data block k transmission times xkS parts are divided into, evenWherein, vkRepresent the unit of data block k Transmission time slice, S represent transmission of data blocks time xkDivide equally number;
Step 2.5:If θ=0,Skip to step 2.8;Otherwise l=1 is made, wherein, l represents currentSequence number;
Step 2.6:Obtained for step 2.3According to In i, k obtains corresponding ERiAnd tRkIf judge ERi=0, tRk=0, Then w=w+1 skips to step 2.7;Otherwise judgeAt the same timeIf so, then tRk=tRk-vk, if it is not, then w=w+1 skips to step 2.7;
Step 2.7:If w=θ, skip to step 2.8, otherwise make l=l+1, if l>θ, then make l=1, w=0 simultaneously skip to step 2.6, otherwise jump directly to step 2.6;
Step 2.8:For data block k, if still havingTransmission time it is remaining, then the residue transmission time is by base Stand erectly and tap into capable broadcast;
Step 2.9:Output:Transmission times of the user i to data block k
CN201510020752.9A 2015-01-15 2015-01-15 The data distributing method with fairness and energy-saving effect of D2D collaboration communications is utilized under the transmission of data blocks time such as a kind of CN104581867B (en)

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Publication number Priority date Publication date Assignee Title
CN102340829A (en) * 2010-07-15 2012-02-01 上海无线通信研究中心 Device-to-device (D2D) cluster data sharing method under cellular environment
CN103533615A (en) * 2013-10-22 2014-01-22 桂林电子科技大学 Energy-saving relay selection method for cooperative transmission of cognitive radio

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102340829A (en) * 2010-07-15 2012-02-01 上海无线通信研究中心 Device-to-device (D2D) cluster data sharing method under cellular environment
CN103533615A (en) * 2013-10-22 2014-01-22 桂林电子科技大学 Energy-saving relay selection method for cooperative transmission of cognitive radio

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