Outage probability analysis of network coded time division multiple access protocol in the relay based cellular networks

This paper considers the network coded relay protocol utilized in the cellular systems. The time division multiple access (TDMA) based opportunistic network coded cooperation(TDMA-ONCC) scheme, whose central idea is to perform the opportunistic network coded cooperation based on the observed instantaneous channel qualities of source-to-relay and relay-to-destination links, is researched. Performances in terms of ergodic capacity and outage probability are derived for both TDMA-ONCC and the single relay based opportunistic selecting Decode-and-Forward (SR-OSDF) schemes. The tight closed form expressions for the outage probability are derived. Numerical results show that the proposed expressions for both the ergodic capacity and the outage probability are close to the theoretical analysis results. The results show that the TDMA-ONCC scheme significantly outperforms the SR-OSDF scheme due to the network coded cooperation gain.