On the Achievable Rate Regions for Interference Channels with Degraded Message Sets

TL;DR

This paper develops a new coding scheme for interference channels with degraded message sets, deriving achievable rate regions that outperform existing results, especially in high-interference scenarios.

Contribution

It introduces a novel coding scheme combining cooperative, collaborative, and dirty paper coding for IC-DMS, expanding the known achievable rate regions.

Findings

Achievable rate regions include several previously known regions.

Numerical results show significant improvements in high-interference regimes.

The scheme applies to both discrete memoryless and Gaussian channels.

Abstract

The interference channel with degraded message sets (IC-DMS) refers to a communication model in which two senders attempt to communicate with their respective receivers simultaneously through a common medium, and one of the senders has complete and a priori (non-causal) knowledge about the message being transmitted by the other. A coding scheme that collectively has advantages of cooperative coding, collaborative coding, and dirty paper coding, is developed for such a channel. With resorting to this coding scheme, achievable rate regions of the IC-DMS in both discrete memoryless and Gaussian cases are derived, which, in general, include several previously known rate regions. Numerical examples for the Gaussian case demonstrate that in the high-interference-gain regime, the derived achievable rate regions offer considerable improvements over these existing results.