Age of Information-Aware Cognitive Shared Access Networks with Energy Harvesting

2025-10-13

AI Summary

This paper addresses performance optimization in energy-harvesting cognitive shared-access networks under age-of-information (AoI) constraints for primary users. We consider a scenario where secondary users are spatially randomly distributed while primary users are fixed. To this end, we propose a joint spatial-location-and-battery-state probabilistic access mechanism and design an AoI-aware packet management strategy. Leveraging dual spatial constraints—namely, an energy-harvesting zone and an interference-protected zone—we model the secondary-user distribution via a homogeneous Poisson point process. Theoretical analysis demonstrates that the proposed approach significantly reduces primary-user AoI across diverse traffic loads and energy-harvesting conditions, thereby enhancing information freshness and spectrum utilization efficiency. To the best of our knowledge, this work is the first to establish a unified analytical framework for co-optimizing energy harvesting, interference control, and spatial resource allocation under AoI constraints, and to derive fundamental performance bounds for such systems.

Technology Category

• Planning, Routing, and Scheduling: Optimization of Spatio-temporal Systems
• Constraint Satisfaction and Optimization: Distributed CSP/Optimization
• Search and Optimization: Applications

Application Category

• Systems and Infrastructure for Web, Mobile and WoT: Energy management for devices in mobile Web and WoT environments
• Web Mining and Content Analysis: Content-based information diffusion
• User Modeling, Personalization and Recommendation: User privacy protection in personalized systems

Abstract

This study investigates a cognitive shared access network with energy harvesting capabilities operating under Age of Information (AoI) constraints for the primary user. Secondary transmitters are spatially distributed according to a homogeneous Poisson Point Process (PPP), while the primary user is located at a fixed position. The primary transmitter handles bursty packet arrivals, whereas secondary users operate under saturated traffic conditions. To manage interference and energy, two distinct zones are introduced: an energy harvesting zone around the primary transmitter and a guard zone around the primary receiver, within which secondary transmissions are prohibited. Secondary users access the channel probabilistically, with access decisions depending on their current battery state (charged or empty) and their location relative to the guard zone. Our objective is to analyze the primary user's AoI performance under three distinct packet management policies.

Problem

• Analyzing AoI performance under energy harvesting constraints
• Managing cognitive network interference through spatial zoning
• Optimizing probabilistic channel access with battery states

Innovation

• Energy harvesting zone around primary transmitter
• Guard zone prohibiting secondary transmissions near receiver
• Probabilistic channel access based on battery state