Age of Information in an URLLC-enabled Decode-and-Forward Wireless Communication System

TL;DR

This paper models and analyzes the Age of Information in an URLLC-enabled wireless system with decode-and-forward relays, deriving a closed-form AAoI expression considering finite block lengths and system parameters.

Contribution

It introduces a novel system model for AAoI in URLLC wireless networks with relay schemes, providing a closed-form expression and analyzing parameter impacts.

Findings

Derived a closed-form AAoI expression for the system.

Identified the impact of update rate, block length, and allocation on AAoI.

Validated results through numerical simulations.

Abstract

Age of Information (AoI) measures the freshness of data in mission critical Internet-of-Things (IoT) applications i.e., industrial internet, intelligent transportation systems etc. In this paper, a new system model is proposed to estimate the average AoI (AAoI) in an ultra-reliable low latency communication (URLLC) enabled wireless communication system with decodeand-forward relay scheme over the quasi-static Rayleigh block fading channels. Short packet communication scheme is used to meet both reliability and latency requirements of the proposed wireless network. By resorting finite block length information theory, queuing theory and stochastic processes, a closed-form expression for AAoI is obtained. Finally, the impact of the system parameters, such as update generation rate, block length and block length allocation factor on the AAoI are investigated. All results are validated by the numerical results.