Protocols For Half-Duplex Multiple Relay Networks

TL;DR

This paper introduces new strategies for half-duplex relay networks, including decode-and-forward and compress-and-forward methods, improving achievable data rates in multi-relay communication scenarios.

Contribution

It presents generalized achievable rates for half-duplex relay networks using multilevel partial decode-and-forward and compress-and-forward schemes, including a mixed strategy for four-terminal networks.

Findings

Achievable rates for multilevel partial decode-and-forward.

Simplified compress-and-forward encoding scheme with improved rates.

Achievable rates for mixed relay strategies in four-terminal networks.

Abstract

In this paper we present several strategies for multiple relay networks which are constrained by a half-duplex operation, i. e., each node either transmits or receives on a particular resource. Using the discrete memoryless multiple relay channel we present achievable rates for a multilevel partial decode-and-forward approach which generalizes previous results presented by Kramer and Khojastepour et al.. Furthermore, we derive a compress-and-forward approach using a regular encoding scheme which simplifies the encoding and decoding scheme and improves the achievable rates in general. Finally, we give achievable rates for a mixed strategy used in a four-terminal network with alternately transmitting relay nodes.