Yunnan Wu, Philip A. Chou, and Sun-Yuan Kung
The exchange of independent information between two nodes in a wireless network can be viewed as two unicast sessions, corresponding to information trans- fer along one direction and the opposite direction. In this paper we show such information exchange can be efficiently performed by exploiting network cod- ing and the physical-layer broadcast property offered by the wireless medium, which improves upon con- ventional solutions that separate the processing of the two unicast sessions. We propose a distributed scheme that obviates the need for synchronization and is robust to random packet loss and delay, and so on. The scheme is simple and incurs minor overhead.