Throughput optimization with random network coding in cooperative wireless network

Abstract

In this paper, we focus on the cooperative strategy for multi-source multi-relay system. In order to overcome unreliable wireless channels, we introduce a certain diversity degree by limiting the number of original packets included in one transmission no more than the number of sources. We applied two diversity schemes, which called spatial diversity combined random linear network coding (SDRLNC) and simple spatial diversity (SSD), respectively. We derived bounds of throughput for these two schemes, respectively. Through simulation we got the conclusion that, given a series of parameters, the SDRLNC scheme always has a better performance and there always exists an optimal diversity degree for both schemes for the purpose of obtaining the optimal throughput.