Age of Information in a SWIPT and URLLC enabled Wireless Communications System

TL;DR

This paper analyzes the freshness of information in a SWIPT-enabled wireless relay system under URLLC constraints, deriving new formulas for average AoI using finite block length theory and validating with numerical analysis.

Contribution

It introduces novel approximation methods to derive explicit expressions for average AoI in a SWIPT and URLLC system, addressing reliability and latency constraints.

Findings

Derived explicit formulas for average AoI using finite block length theory.

Validated analytical results through numerical simulations.

Showed the impact of system parameters on information freshness.

Abstract

This paper estimates the freshness of the information in a wireless relay communication system that employs simultaneous wireless information and power transfer (SWIPT) operating under ultra-reliable low-latency communication (URLLC) constraints. The Age of Information (AoI) metric calculates the time difference between the current time and the timestamp of the most recent update received by the receiver is used here to estimate the freshness of information. The short packet communication scheme is used to fulfil the reliability and latency requirements of the proposed wireless network and its performance is analysed using finite block length theory. In addition, by utilising novel approximation approaches, expressions for the average AoI (AAoI) of the proposed system are derived. Finally, numerical analysis is used to evaluate and validate derived results.