Delay-Limited Cooperative Communication with Reliability Constraints in Wireless Networks

TL;DR

This paper proposes a dynamic resource allocation strategy for delay-sensitive cooperative wireless networks that ensures reliability without prior statistical knowledge, using Lyapunov optimization for real-time implementation.

Contribution

It introduces an online, adaptive framework for resource allocation in delay-limited cooperative communication, extending prior work by removing the need for statistical process knowledge.

Findings

Achieves target outage probability with optimal resource use.

Provides quasi-closed form solutions for various protocols.

Operates without prior statistical knowledge of network processes.

Abstract

We investigate optimal resource allocation for delay-limited cooperative communication in time varying wireless networks. Motivated by real-time applications that have stringent delay constraints, we develop a dynamic cooperation strategy that makes optimal use of network resources to achieve a target outage probability (reliability) for each user subject to average power constraints. Using the technique of Lyapunov optimization, we first present a general framework to solve this problem and then derive quasi-closed form solutions for several cooperative protocols proposed in the literature. Unlike earlier works, our scheme does not require prior knowledge of the statistical description of the packet arrival, channel state and node mobility processes and can be implemented in an online fashion.