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