Wireless Network Design Under Service Constraints

TL;DR

This paper proposes a cost function-based approach for designing wireless network control policies that satisfy application-specific service constraints like avoiding buffer underflows, enhancing flexibility over traditional throughput-focused methods.

Contribution

It introduces new stability results and evaluates cost functions for wireless streaming traffic, aiding network design under service constraints.

Findings

Cost function approach effectively enforces service constraints.

New stability results support control policy design.

Numerical simulations demonstrate improved performance.

Abstract

In this paper we consider the design of wireless queueing network control policies with special focus on application-dependent service constraints. In particular we consider streaming traffic induced requirements such as avoiding buffer underflows, which significantly complicate the control problem compared to guaranteeing throughput optimality only. Since state-of-the-art approaches for enforcing minimum buffer constraints in broadcast networks are not suitable for application in general networks we argue for a cost function based approach, which combines throughput optimality with flexibility regarding service constraints. New theoretical stability results are presented and various candidate cost functions are investigated concerning their suitability for use in wireless networks with streaming media traffic. Furthermore we show how the cost function based approach can be used to aid wireless network design with respect to important system parameters. The performance is demonstrated using numerical simulations.