Energy Efficiency Comparison Among Direct, One-Way and Two-Way Relay Transmission

Provided by: BeiHang University
Topic: Mobility
Format: PDF
In this paper, the authors compare the Energy Efficiencies (EEs) of Direct Transmission (DT), One-Way Relay Transmission (OWRT) and Two-Way Relay Transmission (TWRT) in a system where two source nodes transmit to each other and may be assisted by an amplify-and-forward relay node. They first find the maximum EEs of DT, OWRT and TWRT by jointly optimizing the transmission time and the transmit powers at each node. Then they compare the maximum EEs of the three strategies, and analyze the impact of circuit powers and bidirectional data amounts. Analytical and simulation results show that relaying is not always more energy efficient than DT.

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