SIREN: Multiobjective Game-Theoretic Scheduler Based on Memory-Driven Gray Wolf Optimization in Fog–Cloud Computing

Fog-cloud task scheduling faces the dual challenge of maintaining critical IoT workloads despite node failures while adhering to strict energy budgets. We present SIREN, a game-theoretic framework that treats fog nodes as strategic players, embedding reliability benefits and DVFS-aware energy costs directly into their payoffs. By searching the joint strategy space with a Memory-Driven Grey Wolf Optimizer (MDGWO), SIREN adapts placements, selective replication, and frequency settings to workload dynamics. Extensive evaluations on the Alibaba 2018 and Google 2011 cluster traces and on a latency-critical healthcare application demonstrate that SIREN converges to near-Nash schedules that minimize energy while maximizing reliability. Results confirm that SIREN delivers (i) 100% task success rates in critical healthcare scenarios, (ii) 2.08×–4.24× lower worst-case energy consumption than leading baselines, and (iii) a 3.9×–5.8× reduction in network usage, establishing a new benchmark for resilient, energy-efficient fog computing.