Carbon-aware decentralized dynamic task offloading in MIMO-MEC networks via multi-agent reinforcement learning

• URL: http://arxiv.org/abs/2602.18797v1
• Date: Sat, 21 Feb 2026 11:07:11 GMT
• Title: Carbon-aware decentralized dynamic task offloading in MIMO-MEC networks via multi-agent reinforcement learning
• Authors: Mubshra Zulfiqar, Muhammad Ayzed Mirza, Basit Qureshi,
• Abstract summary: This paper proposes CADDTO-PPO, a carbon-aware decentralized dynamic task offloading framework based on multi-agent policy optimization.<n>The framework achieves the lowest carbon intensity and maintains near-zero overflow rates under extreme traffic loads.
• Score: 0.7373617024876725
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Massive internet of things microservices require integrating renewable energy harvesting into mobile edge computing (MEC) for sustainable eScience infrastructures. Spatiotemporal mismatches between stochastic task arrivals and intermittent green energy along with complex inter-user interference in multi-antenna (MIMO) uplinks complicate real-time resource management. Traditional centralized optimization and off-policy reinforcement learning struggle with scalability and signaling overhead in dense networks. This paper proposes CADDTO-PPO, a carbon-aware decentralized dynamic task offloading framework based on multi-agent proximal policy optimization. The multi-user MIMO-MEC system is modeled as a Decentralized Partially Observable Markov Decision Process (DEC-POMDP) to jointly minimize carbon emissions and buffer latency and energy wastage. A scalable architecture utilizes decentralized execution with parameter sharing (DEPS), which enables autonomous IoT agents to make fine-grained power control and offloading decisions based solely on local observations. Additionally, a carbon-first reward structure adaptively prioritizes green time slots for data transmission to decouple system throughput from grid-dependent carbon footprints. Finally, experimental results demonstrate CADDTO-PPO outperforms deep deterministic policy gradient (DDPG) and lyapunov-based baselines. The framework achieves the lowest carbon intensity and maintains near-zero packet overflow rates under extreme traffic loads. Architectural profiling validates the framework to demonstrate a constant $O(1)$ inference complexity and theoretical lightweight feasibility for future generation sustainable IoT deployments.

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