Abstract
In wireless networks, the retransmission should be performed by the sender to recover lost packets at the receiver. The conventional retransmission scheme only includes one lost packet in a retransmission, which results low retransmission efficiency. However, with the help of broadcasting nature of wireless channel and the network coding (NC) technique, we can encode N packets lost at N destinations in one retransmission to effectively recover the lost packets. Some work has been conducted on using NC to retransmit lost packets in the single-sender multiple-receiver (SSMR) wireless network scenarios. In this paper, we combine NC and retransmission in multiple-sender multiple-receiver scenarios, which is a more realistic wireless network scenario. To this end, a Probabilistic Network Coding Retransmission Mechanism (PNCRM) is proposed for MSMR wireless networks. The analysis and numerical results validate the effectiveness of PNCRM.
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