Cross-Layer Design of Rateless Random Network Codes for Delay Optimization
The authors study joint network and channel code design to optimize delay performance. Here the delay is the transmission time of information packets from a source to sinks without considering queuing effects. In their systems, network codes (network layer) are on top of channel codes (physical layer) which are disturbed by noise. Network codes run in a rate-less random method, and thus have erasure-correction capability. For the constraint of finite transmission time, transmission errors are inevitable in the physical layer.