Energy Efficiency in ARQ-Based Multi-Hop Systems and the Tradeoff with Throughput  

作　　者：Ali Asghar Haghighi 

机构地区：[1]Electrical and Computer Engineering Group,Golpayegan College of Engineering,Isfahan University of Technology,Golpayegan 87717-67498,Iran

出　　处：《China Communications》2023年第6期60-71,共12页中国通信（英文版）

摘　　要：The minimum energy per bit(EPB)as the energy efficiency(EE)metric in an automatic retransmission request(ARQ)based multi-hop system is analyzed under power and throughput constraints.Two ARQ protocols including type-I(ARQ-I)and repetition redundancy(ARQ-RR)are considered and expressions for the optimal power allocation(PA)are obtained.Using the obtained optimal powers,the EE-throughput tradeoff(EETT)is analyzed and the EETT closed-form expressions for both ARQ protocols and in arbitrary average channel gain values are obtained.It is shown that how different throughput requirements,especially the high levels,affect the EE performance.Additionally,asymptotic analysis is made in the feasible high throughput values and lower and upper EETT bounds are derived for ARQ-I protocol.To evaluate the EE a distributed PA scenario,as a benchmark,is presented and the energy savinggain obtained from the optimal PA in comparison with the distributed PA for ARQ-I and ARQ-RR protocols is discussed in different throughput values and node locations.

关 键 词：ARQ cooperative relaying energy efficiency green communication multi-hop systems routing algorithms throughput analysis 

分 类 号：TN914.41[电子电信—通信与信息系统]