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| Cross-layer Optimization Design of Energy Efficiency in HARQ Based Multihop Relay Networks |
| XIAO Bo① XI Yong① HAN Junmei① GE Songhu② |
①(School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China)
②(National Key Laboratory for Vessel Integrated Power System Technology, Naval University of Engineering, Wuhan 430033, China) |
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Abstract The cross-layer optimum scheme of Energy Efficiency (EE) for a multihop relay network with Chase- Combining based Hybrid Automatic Repeat reQuest (CC-HARQ) in Rayleigh fading channels is proposed. In order to maximize EE, a closed-form expression of Energy Efficiency in a multihop CC-HARQ system is derived, which is obtained via an average frame error rate model adopting a new log-domain linear threshold method, and then optimal frame length scheme and optimal transmission power allocation method are further designed, towards the frame length and transmission power, a joint optimization metric of those two parameters is considered. Simulation results verify the correctness and feasibility of the analytical solutions, meanwhile, simulation experiments of comparisons show that the proposed cross-layer optimization design is able to improve the EE performance of practical multihop networks.
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Received: 21 March 2016
Published: 30 September 2016
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| Fund: The National Natural Science Foundation of China (61471376) |
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Corresponding Authors:
XIAO Bo
E-mail: 13272415212@163.com
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