Unicast Barrage Relay Networks: Outage Analysis and Optimization

TL;DR

This paper provides a comprehensive outage analysis and optimization framework for unicast barrage relay networks, modeling CBR behavior with Markov processes and deriving closed-form outage probabilities considering fading and interference.

Contribution

It introduces an analytical model for CBR outage probability and optimizes network parameters like CBR size, relay count, relay placement, and code rate for maximum capacity.

Findings

Closed-form outage probability considering fading and interference

Optimal CBR size and relay placement for network performance

Maximum transport capacity achieved through parameter optimization

Abstract

Barrage relays networks (BRNs) are ad hoc networks built on a rapid cooperative flooding primitive as opposed to the traditional point-to-point link abstraction. Controlled barrage regions (CBRs) can be used to contain this flooding primitive for unicast and multicast, thereby enabling spatial reuse. In this paper, the behavior of individual CBRs is described as a Markov process that models the potential cooperative relay transmissions. The outage probability for a CBR is found in closed form for a given topology, and the probability takes into account fading and co-channel interference (CCI) between adjacent CBRs. Having adopted this accurate analytical framework, this paper proceeds to optimize a BRN by finding the optimal size of each CBR, the number of relays contained within each CBR, the optimal relay locations when they are constrained to lie on a straight line, and the code rate that maximizes the transport capacity.