Dynamic Power Control for Packets with Deadlines

TL;DR

This paper proposes a dynamic power control algorithm for wireless devices with strict packet deadlines, optimizing packet drop rate and power consumption using Lyapunov optimization.

Contribution

It introduces a novel power allocation method that outperforms EDF in balancing packet drop rate and power use under delay constraints.

Findings

Achieves similar packet drop rates as EDF with sufficient power.

Outperforms EDF in power efficiency for the same drop rate.

Effectively manages delay-sensitive traffic with adaptive power control.

Abstract

Wireless devices need to adapt their transmission power according to the fluctuating wireless channel in order to meet constraints of delay sensitive applications. In this paper, we consider delay sensitivity in the form of strict packet deadlines arriving in a transmission queue. Packets missing the deadline while in the queue are dropped from the system. We aim at minimizing the packet drop rate under average power constraints. We utilize tools from Lyapunov optimization to find an approximate solution by selecting power allocation. We evaluate the performance of the proposed algorithm and show that it achieves the same performance in terms of packet drop rate with that of the Earliest Deadline First (EDF) when the available power is sufficient. However, our algorithm outperforms EDF regarding the trade-off between packet drop rate and average power consumption.