Date Added: Jul 2011
The broadcast nature of wireless links makes wireless networks an attractive environment for intersession network coding. Most intersession network coding protocols exploit this property, but ignore the diversity among the links by turning off coding when the channels are lossy. Other protocols deal with the packets separately - not as members of flows - which makes the intersession network coding problem with lossy links untractable. In this paper, the authors use a different approach by looking at flows or batches instead of individual packets. They characterize the capacity region of the 2-hop relay network when the coding operations are limited to XOR.