PROJECT TITLE :

Cross-Layer Performance Analysis of Cooperative ARQ With Opportunistic Multi-Point Relaying in Mobile Networks - 2018

ABSTRACT:

A cross-layer analysis framework is developed for the look and performance evaluations of cooperative automatic repeat request (ARQ) with opportunistic multi-point relaying (OMPR) in mobile networks. In explicit, three exemplar OMPR functions and their combinations are studied for opportunistic distributed area-time coded (ODSTC) retransmissions in time-division duplex long-term evolution advanced systems. In keeping with the complexities and coordination delays of the OMPR functions, the influences of channel fading on the spatial and temporal diversities offered by ODSTC-based ARQ and their impacts on the system throughput, transmission energy consumption, and relays' queuing delays can be evaluated effectively underneath this framework. Based on the analytical results, a rate adaptation strategy is also proposed to maximize the system throughput subject to constraints on queuing delays at relay stations (RSs) and packet error rates at mobile stations (MSs). Analysis and simulation results show that in typical vehicular speeds, using maximally 2 active RSs for ODSTC could be a terribly strong and effective selection to provide near best system throughput with less energy consumptions and lower protocol complexities. The throughput gains over a system while not using RS retransmissions vary from 16 ~ 80p.c for cell-edge MSs, with solely 25 ~ 45% of the transmission energy consumption.