Abstract
Network coding (NC) has been proved as an effective way to improve the throughput and power efficiency of wireless networks by combining multiple incoming packets into a single one before forwarding. However, packets need to wait for its correspondences before coding, which may induce additional delay and packet loss. Moreover, if different flows have unequal data arriving rates at the coding node, the performance will be worse. Considering the diversity of traffic flows and the stochastic nature of the packet arrival process in wireless networks, we propose extended network coding schemes on the basis of the Probabilistic Network Coding with Priority (PNCP) method. The coding node can transmit either network-coded or un-coded packets which are determined by data arrival rates and queue state. Finally, we show the effectiveness of the proposed methods through simulations.
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