Energy-Efficient Relay Selection for Cooperative Relaying in Wireless Multimedia Networks

In existing wireless networks, supporting multimedia services are becoming more popular and important. In general, wireless multimedia networks should require energy efficiency and reliable transmission while keeping satisfactory quality of services. In this respect, cooperative communications have...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2015-03, Vol.64 (3), p.1156-1170
Main Authors: Zhengguo Sheng, Jun Fan, Liu, Chi Harold, Leung, Victor C. M., Xue Liu, Leung, Kin K.
Format: Article
Language:English
Subjects:
Diversity reception
Energy conservation
Fading
Gain
Multimedia
Multimedia communication
Networks
Power consumption
Power demand
Quality of service
Relay
Relaying
Relays
Simulation
Wireless communication
Wireless networks
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Summary:In existing wireless networks, supporting multimedia services are becoming more popular and important. In general, wireless multimedia networks should require energy efficiency and reliable transmission while keeping satisfactory quality of services. In this respect, cooperative communications have been considered as an efficient approach to address these demands by offering significant diversity gains over single-antenna systems without increasing requirements on radio resources. In this paper, we propose a power-allocation method to optimize the decode-and-forward (DF) cooperative transmission for source and relay nodes as a means to reduce the total power consumption, while maintaining the required quality of services, and investigate fundamental characteristics of cooperative transmission in terms of power efficiency. Moreover, for a network with multiple cooperative nodes, we also propose an energy-efficient relay selection rule to offer fairness at each node and implement it into a practical routing protocol. Our performance analysis is supplemented by simulation results to illustrate significant energy savings of the proposed methods.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2014.2322653