Freeze-Release: A Transient Supervisory Control Layer for Mixed-Criticality Traffic Under Overload
7th International Conference on Intelligent Communication Technologies and Virtual Mobile Networks, ICICV 2026, Tirunelveli, India, 20 - 22 May 2026, pp.130-137, (Full Text)
- Publication Type: Conference Paper / Full Text
- Doi Number: 10.1109/icicv68925.2026.11554808
- City: Tirunelveli
- Country: India
- Page Numbers: pp.130-137
- Keywords: Packet Scheduling, Quality of Service, Real-Time Systems, Resource Allocation, Wireless Communications
- Ataturk University Affiliated: Yes
Abstract
Shared wireless resources often carry both safety-critical and best-effort traffic, creating a trade-off between safety reliability and throughput under overload. This paper presents Freeze-Release (FR), a lightweight two-mode supervisory controller that temporarily shifts PRBs toward safety traffic when risk is detected from backlog, backlog growth, and head-of-line slack. FR is evaluated in a discrete-event downlink simulator against Always-Normal and Always-Freeze under best-effort overload. Results show that FR maintains zero safety deadline violations while substantially improving best-effort throughput over permanent freezing (2579 vs. 1026.5 pps in the Poisson case) and keeping safety tail latency close to Always-Freeze (Sp99 = 0.299 ms vs. 0.214 ms). Under periodic multi-source safety traffic, FR further reduces freeze usage to 30.3% while achieving 3379 pps with zero violations. These results show that short, risk-aware interventions can protect safety traffic without unnecessary throughput loss.