Research Article
Cross-layer Design and Performance Comparison of HARQ Schemes with Imperfect CSI In Cooperative Relay Networks
@INPROCEEDINGS{10.1109/ChinaCom.2011.6158178, author={Lun Tang and Rongrong Zhang and Qianbin Chen and Xiaoping Zeng}, title={Cross-layer Design and Performance Comparison of HARQ Schemes with Imperfect CSI In Cooperative Relay Networks}, proceedings={6th International ICST Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2012}, month={3}, keywords={cooperative relay network; cross-layer design and optimization; adaptive modulation and coding (amc); hybrid automatic repeat request (harq); nakagami-m channels}, doi={10.1109/ChinaCom.2011.6158178} }- Lun Tang
Rongrong Zhang
Qianbin Chen
Xiaoping Zeng
Year: 2012
Cross-layer Design and Performance Comparison of HARQ Schemes with Imperfect CSI In Cooperative Relay Networks
CHINACOM
IEEE
DOI: 10.1109/ChinaCom.2011.6158178
Abstract
we consider cross-layer design frameworks and performance comparison of HARQ schemes in cooperative relay networks with imperfect channel state information (CSI). Firstly, we propose a state transition models to analyze and calculate the HARQ average packet error rate (PER) and latency performance over Nakagami-m channel with imperfect CSI for relay networks; Secondly, By combing the adaptive modulation and coding (AMC) at the physical layer with hybrid automatic repeat request (HARQ) at data link layer, a cross-layer optimization model that maximizing the average spectral efficiency is formulated under average transmitting delay constraints, and an iteration algorithm for the cross-layer optimization model is designed. We compared the average packet error rate (PER) and spectral efficiency of three kinds of different HARQ protocols in our cross-layer optimization schemes. The numerical results show that our schemes can achieve maximum spectral efficiency. The cross-layer design with AMC and type-III HARQ provides a larger spectral efficiency and lower PER with cooperative relay than the other two HARQ protocols.