Omnidirectional Relay in Wireless Networks

TL;DR

This paper introduces an omnidirectional relay scheme for wireless networks that enables simultaneous multi-directional message relaying, eliminating interference and maximizing data rates in symmetric networks without beamforming.

Contribution

It proposes a novel omnidirectional relay scheme using decode-and-forward and network coding principles, achieving interference-free communication and maximum rates in symmetric wireless networks.

Findings

Eliminates interference in all-source all-cast scenarios.

Achieves maximum data rates in symmetric networks without beamforming.

Enables simultaneous relaying of multiple messages in different directions.

Abstract

For wireless networks with multiple sources, an omnidirectional relay scheme is developed, where each node can simultaneously relay different messages in different directions. This is accomplished by the decode-and-forward relay strategy, with each relay binning the multiple messages to be transmitted, in the same spirit of network coding. Specially for the all-source all-cast problem, where each node is an independent source to be transmitted to all the other nodes, this scheme completely eliminates interference in the whole network, and the signal transmitted by any node can be used by any other node. For networks with some kind of symmetry, assuming no beamforming is to be performed, this omnidirectional relay scheme is capable of achieving the maximum achievable rate.