• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 28 Issue 1
Jan.  2015
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Article Contents
HUANG Gaoyong, FANG Xuming, CHEN Yu, ZHANG Qiangfeng. Optimal Energy-Efficient Path Selection Scheme in OFDM-based DF Relay Networks[J]. Journal of Southwest Jiaotong University, 2015, 28(1): 58-65. doi: 10.3969/j.issn.0258-2724.2015.01.009
Citation: HUANG Gaoyong, FANG Xuming, CHEN Yu, ZHANG Qiangfeng. Optimal Energy-Efficient Path Selection Scheme in OFDM-based DF Relay Networks[J]. Journal of Southwest Jiaotong University, 2015, 28(1): 58-65. doi: 10.3969/j.issn.0258-2724.2015.01.009

Optimal Energy-Efficient Path Selection Scheme in OFDM-based DF Relay Networks

doi: 10.3969/j.issn.0258-2724.2015.01.009
  • Received Date: 09 Oct 2013
  • Publish Date: 25 Feb 2015
  • Based on a three-node orthogonal frequency division multiplexing (OFDM)-based relay transmission network and decode-and-forward (DF) relaying strategy, an optimal energy-efficient path selection scheme was proposed. By converting the fading values of both the relay and direct links into the equivalent path loss values, an optimal energy-efficient path selection criterion based on equivalent path loss exponent was presented. The effects of the circuit power consumption, bandwidth, data rate requirements and channel conditions on the system energy efficiency in the selection of transmission path were also analyzed. Simulation results show that the optimal energy-efficient transmission path depends on the bandwidth, data rate, and channel conditions, and satisfies the decision criteria of the optimal energy-efficient path. Comparing with the path selection scheme based on the maximum harmonic channel gain, when the distance between base station (BS) and mobile station (MS) equals 610 m, and data rates equal 5 and 6 Mbit/s respectively, the energy efficient values of the proposed scheme are increased by 11.8% and 40.5% respectively.

     

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