Optimality of Separate Network-Channel Coding for Three Messages
The authors study the optimality of separate network-channel coding (SJNC) for three independent sources on the orthogonal access scheme. By SJNC, they mean that the network coded messages are formed from the binary XOR of the sources' messages, followed by channel encoding which is independent of the network coding. Decoding is performed jointly across the network and channel codes. Using standard random coding and joint typical set decoding, they obtain an achievable rate region for SJNC.