Distributed Rateless Codes with UEP Property

TL;DR

This paper introduces DU-rateless, a novel distributed rateless coding scheme that provides unequal error protection for multiple sources, enhancing transmission efficiency and flexibility in relay networks.

Contribution

It proposes DU-rateless codes with UEP capability, analyzes their performance using And-Or tree analysis, and designs optimal codes via multi-objective genetic algorithms.

Findings

DU-rateless offers UEP for sources with different importance levels.

The codes are optimized for various setups using genetic algorithms.

Performance evaluations show improved transmission efficiency.

Abstract

When multiple sources of data need to transmit their rateless coded symbols through a single relay to a common destination, a distributed rateless code instead of several separate conventional rateless codes can be employed to encode the input symbols to increase the transmission efficiency and flexibility. In this paper, we propose distributed rateless codes DU-rateless that can provide unequal error protection (UEP) for distributed sources with different data block lengths and different importance levels. We analyze our proposed DU-rateless code employing And-Or tree analysis technique. Next, we design several sets of optimum DU-rateless codes for various setups employing multi-objective genetic algorithms and evaluate their performances.