检索结果-南通市图书馆

cooperative communication with Asymmetric Channel State Information: A Contract Theoretic Modeling Approach

在线全文

学校读者我要写书评

暂无评论

China communications 2013年第1期10卷 31-43页

作者： Bahareh Nazari Abbas Jamalipour School of Electrical and Information Engineering The University of Sydney

In relay-assisted cooperative communication,relay nodes help forwarding the information of a source node in case of link failure between the source and a *** user cooperation improves the overall efficiency of the network,it requires incentive to stimulate potential relay nodes to assist the source by forwarding its data to the ***,the potential relays are better informed than the source about their channel conditions to destination,which results in asymmetric information between the source and the *** this paper,we study the problem of lack of forwarding incentive in cooperative communication when channel state information of relays is private information and not known by the *** tackle this problem,we apply the principle of contract theory to a cooperative wireless *** first designs incentive compatible and individually rational contract,consisting of a set of power-credit *** it broadcasts contract items to nearby *** the source node receives reply messages from the volunteer relays,it chooses one or more relays based on its requirements and communication *** results show how credit assignment works in order to stimulate relays to cooperate and prevents relays from cheating behavior.

关键词： cooperative communication co- operative relay mobile telecommunications

Relay selection based on MAP estimation for cooperative communication with outdated channel state information

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2013年第3期26卷 661-667页

作者： Ding Wenrui Fei Li Gao Qiang Liu Shuo Institute of Unmanned Air Vehicle Beihang University School of Electronic and Information Engineering Beihang University

In this paper, we consider an amplify-and-forward （AF） cooperative communication system when the channel state information （CSI） used in relay selection differs from that during data transmission, i.e., the CSI used in relay selection is outdated. The selected relay may not be actually the best for data transmission and the outage performance of the cooperative system will deteriorate. To improve its performance, we propose a relay selection strategy based on maximum a posteriori （MAP） estimation, where relay is selected based on predicted signal-to-noise ratio （SNR）. To reduce the computation complexity, we approximate the a posteriori probability density of SNR and obtain a closed-form predicted SNR, and a relay selection strategy based on the approximate MAP estimation （RS-AMAP） is proposed. The simulation results show that this approximation leads to trivial performance loss from the perspective of outage probability. Compared with relay selection strategies given in the literature, the outage probability is reduced largely through RS-AMAP for medium-to-large transmitting powers and medium-to-high channel correlation coefficients.

关键词： cooperative communication MAP estimation Outdated CSI Relay selection Wireless networks

Degree distribution and robustness of cooperative communication network with scale-free model

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2015年第6期24卷 115-121页

作者：王建荣王建萍何振许海涛 School of Computer and communication Engineering University of Science and Technology Beijing

With the requirements of users enhanced for wireless communication, the cooperative communication will become a development trend in future. In this paper, a model based on complex networks with both preferential attachment is researched to solve an actual network CCN （cooperative communication Network）. Firstly, the evolution of CCN is given by four steps with different probabilities. At the same time, the rate equations of nodes degree are presented to analyze the evolution of CCN. Secondly, the degree distribution is analyzed by calculating the rate equation and numerical simulation. Finally, the robustness of CCN is studied by numerical simulation with random attack and intentional attack to analyze the effects of degree distribution and average path length. The results of this paper are more significant for building CCN to programme the resource of communication.

关键词： cooperative communication complex networks scale-free degree distribution robustness

Research on improving the QoE of relay users in cooperative communication systems

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2009年第6期16卷 1-5页

作者： WANG Liang,XIE Wei-hao,CHEN Hui-min,WU Zhuo Key Laboratory of Specialty Fiber Optics and Optical Access Networks,School of communication and Information Engineering, Shanghai University,Shanghai 200072,China Key Laboratory of Specialty Fiber Optics and Optical Access Networks School of Communication and Information Engineering Shanghai University Shanghai 200072 China

Customers＇ satisfaction with services is reflected by quality of experience（QoE）.Insofar,most studies on cooperative communication have been focused on improving the QoE of source ***,the improvement of a source user＇s QoE is obtained at cost of degradation of the relay user＇s *** the other hand,cooperative communications can achieve performance similar to that of a conventional multiple-input multiple-output（MIMO） system by forming virtual MIMO ***,to improve the QoE performance of relay users,this article proposes the concept of a belief threshold at the destination user and a new cooperative scheme based on the belief threshold destination（BTD） technique,while without decaying the BER performance of the communication system.

关键词： cooperative communication relay user QoE BTD

Energy-efficient power allocation for selfish cooperative communication networks using bargaining game

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2012年第4期55卷 795-804页

作者： DING EnJie 1,ZHANG GuoPeng 1,LIU Peng 1 & YANG Kun 2 1 CUMT-IoT Perception Mine Research Center,China University of Mining and Technology,Xuzhou 221116,China 2 School of Computer Science and Electronic Engineering,University of Essex Wivenhoe Park,Colchester Essex,CO4 3SQ,UK CUMT-IoT Perception Mine Research Center China University of Mining and Technology Xuzhou China School of Computer Science and Electronic Engineering University of Essex Wivenhoe Park Colchester Essex UK

In commercial networks,user nodes operating on batteries are assumed to be selfish to consume their energy solely to maximize their own benefits,e.g.,data *** this paper,we propose a bargaining game to perform the power allocation for the selfish cooperative communication *** our system,two partner nodes can act as a source as well as a relay for each other,and each node is with an energy constraint to transmit one *** a selfish node is willing to seek cooperative transmission only if the data rate achieved through cooperation will not lower than that achieved through noncooperation by using the same amount of *** energy-efficient power allocation problem can be modeled as a cooperative *** proved that there exists a unique Nash bargaining solution (NBS) for the game by verifying that the game is indeed a bargaining ***,the two objectives,i.e.,system efficiency and user fairness specified in the selfish networks can be *** results show that the NBS scheme is efficient in that the performance loss of the NBS scheme to that of the maximal overall rate scheme is small while the maximal-rate scheme is *** simulation results also show that the NBS result is fair in that both nodes could experience better performance than they work independently and the degree of cooperation of a node only depends on how much contribution its partner can make to improve its own performance.

关键词： cooperative communication energy efficiency resource allocation cooperative game theory Nash bargaining solution

BER-based relay selection strategy for cooperative communication

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2020年第4期31卷 685-691页

作者： YANG Peiyao LI Hai HOU Shujuan YANG Liuqing Beijing Institute of Spacecraft System Engineering China Academy of Space TechnologyBeijing 100094China School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China

In this paper, a bit error ratio(BER)-based relay selection strategy is investigated under opportunistic relay *** challenging problem is to design the relay selection rule so that the relay is able to measure the performance of the cooperative system at the destination exactly with low computation *** paper derives a closed-form expression of the end-to-end bit error rate firstly. Then, an approximate BER expression based on the relationship between the instantaneous signal-to-noise ratio(SNR) of the relay-to-destination link and the probability of error propagation is derived. Finally, a simplified relay selection formula is proposed. Simulation results prove that the proposed relay selection rule can reflect the BER of each relay properly as well.

关键词： cooperative communication relay selection demodulate-and-forward

A cooperative user selection scheme based on energy efficiency and interference factor in cooperative communication systems

在线全文

学校读者我要写书评

暂无评论

High Technology Letters 2016年第2期22卷 183-191页

作者：李萌 Sun Enchang Yu Fei Richard Zhang Yanhua Beijing Advanced Innovation Center for Future Internet Technology Beijing University of Technology College of Electronics Information and Control Engineering Beijing University of Technology Department of Systems and Computer Engineering Carleton University

With the rapid development of green communications,energy consumption issue plays more and more important role in cooperative communication strategies and communication *** on cooperative transmission model,a cooperative user selection scheme is proposed in consideration of both energy efficiency and interference *** the proposed scheme,the selected cooperative user consumes less energy and receives less ***,the main factor is analyzed to affect system performance,including signal-to-noise ratio(SNR)of source user and cooperative user,distance between source user and cooperative user or base station(BS),and fading factor in the transmission *** the proposed scheme,energy consumption and influence of interference are jointly taken into account during the cooperative user selection ***,bit error rate(BER)in proposed scheme is also superior to existing *** results are presented to show the performance improvement of the proposed scheme.

关键词： green communication cooperative communication energy efficiency interferencefactor

Performance Analysis of Single Relay Selection in cooperative communication over Nakagami-m Fading Channels

在线全文

学校读者我要写书评

暂无评论

Journal of Shanghai Jiaotong university(Science) 2013年第1期18卷 25-28页

作者：朱赟林如丹徐友云蔡春晓唐玉春 Research Institute of Optoelectronic Materials and Technology School of Physics and Electronics InformationGannan Normal University School of Information Engineering Gannan Medical University Institute of communications Engineering PLA University of Science and Technology Institute of Wireless communication Technology Shanghai Jiaotong University No.34 Research Institute of China Electronics Technology Group Corporation

We derive closed-form expressions for outage probability and symbol error rate （SER） of opportunistic relaying （OR） and selection cooperation （SC）. For the amplify-and-forward relay selection scheme, comparison between two selection strategies over independent non-identically distributed Nakagami-rn fading channels via analytical and simulation results is given in terms of the outage probability and SER. Simulation results show that OR performs better than SC.

关键词： cooperative communication outage probability Nakagami-m fading channel relay selection

Maritime Search and Rescue Networking Based on Multi-Agent cooperative communication

在线全文

学校读者我要写书评

暂无评论

Journal of communications and Information Networks 2019年第1期4卷 42-53页

作者： Zhi Jiang Tingting Yang Lin Zhou Yuqing Yuan Hailong Feng Navigation College Dalian Maritime UniversityDalian 116026China School of Electrical Engineering and Intelligentization Dongguan University of TechnologyDongguan 523000China College of Transportation Engineering Dalian Maritime UniversityDalian 116026China

Rapid and effective maritime search and rescue operations become the important guarantee for the safety of maritime *** existing maritime search and rescue networking and model have slow response speed and low *** distribution,synergy,parallelism,robustness and intelligence of unmanned surface vehicle(USV)and unmanned aerial vehicle(UAV)provide a new idea for the novel maritime search and rescue networking,in which multi-agent could be used to build a layered control *** this paper,a novel rapid search and rescue system is proposed by utilizing the improved ant colony optimization and the independent calculation decision of the *** system adopts the edge computing,relies on the information sharing and the cooperative decision between the search and rescue agent *** achieves the independent synchronous search and *** the same time,we use particle swarm optimization to intelligently schedule data packets during the rescue process to optimize network forwarding *** on the distributed cluster control of USV and UAV,this paper combines edge computing,cooperative communication and centralized task allocation together to make decision for *** simulation results show that our proposed schemes realize a significant improvement for maritime search and rescue.

关键词： edge computing cooperative communication swarm intelligence search and rescue