Non-Linear Age of Information: An Energy Efficient Receiver-Centric Approach

TL;DR

This paper analyzes the age of information in wireless systems with Rician fading and multiple antennas, deriving new formulas for non-linear AoI and emphasizing energy efficiency in receiver-centric strategies.

Contribution

It introduces a comprehensive analysis of non-linear AoI in multi-antenna Rician channels, providing closed-form expressions and focusing on energy-efficient receiver-centric approaches.

Findings

Derived closed-form expressions for average AoI and peak AoI.

Highlighted energy efficiency benefits of receiver-centric non-linear AoI strategies.

Provided engineering insights for practical wireless system design.

Abstract

The age of information (AoI) performance metric for point-to-point wireless communication systems is analytically studied under Rician-faded channels and when the receiver is equipped with multiple antennas. The general scenario of a non-linear AoI function is considered, which includes the conventional linear AoI as a special case. The stop-and-wait transmission policy is adopted, where the source node samples and then transmits new data only upon the successful reception of previous data. This approach can serve as a performance benchmark for any queuing system used in practice. New analytical and closed-form expressions are derived with respect to the average AoI and average peak AoI for the considered system configuration. We particularly focus on the energy efficiency of the said mode of operation, whereas some useful engineering insights are provided.