Mobility

The Role of Feedback in the Choice Between Routing and Coding for Wireless Unicast

Free registration required

Executive Summary

The authors consider the benefits of coding in wireless networks, specifically its role in exploiting the local broadcast property of the wireless medium. They first provide a natural argument that for unicast, the throughput achieved with network coding is the same as that achieved without any coding. This argument highlights the role of a general max-flow min-cut duality in such a result, and is more explicit than previous proofs. This maximum throughput can be achieved either by a flow scheduler with knowledge of the network topology, or by a blind back-pressure algorithm, however all such policies require dynamic routing decisions which depend critically on rich feedback signaling information.

  • Format: PDF
  • Size: 239.6 KB