Age of Information With Prioritized Streams: When to Buffer Preempted Packets?

Abstract

In this paper, we consider N information streams sharing a common service facility. The streams are supposed to have different priorities based on their sensitivity. A higher priority stream will always preempt the service of a lower priority packet. By leveraging the notion of Stochastic Hybrid Systems (SHS), we investigate the Age of Information (AoI) in the case where each stream has its own waiting room; when preempted by a higher priority stream, the packet is stored in the waiting room for future resume. Interestingly, it will be shown that a "no waiting room" scenario, and consequently discarding preempted packets, is better in terms of average AoI in some cases. The exact cases where this happen are discussed and numerical results that corroborate the theoretical findings and highlight this trade-off are provided.

arXiv commentarXiv admin note: text overlap with arXiv:1901.00481

References in corpus (3)

• Minimizing The Age of Information: NOMA or OMA?
• Age of Information With Prioritized Streams: When to Buffer Preempted Packets?
• Minimizing The Age of Information in a CSMA Environment

Cited by in corpus (6)

• Peak Age of Information in Priority Queueing Systems
• Age of Information With Prioritized Streams: When to Buffer Preempted Packets?
• Minimizing The Age of Information in a CSMA Environment
• PoPeC: PAoI-Centric Task Offloading with Priority over Unreliable Channels
• Exact Analytical Model of Age of Information in Multi-source Status Update Systems with Per-source Queueing
• Age of Information Optimization with Preemption Strategies for Correlated Systems