Energy-Efficient Edge Caching and Task Deployment Algorithm Enabled by Deep Q-Learning for MEC

Container technology enables rapid deployment of computing services, while edge computing reduces the latency of task computing and improves performance. However, there are limits to the types, number and performance of containers that can be supported by different edge servers, and a sensible task...

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Vydané v:Electronics (Basel) Ročník 11; číslo 24; s. 4121
Hlavní autori: Ma, Li, Wang, Peng, Du, Chunlai, Li, Yang
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Basel MDPI AG 01.12.2022
Predmet:
Algorithms
Analysis
Artificial neural networks
Augmented reality
Cache memory
Caching
Cellular telephones
Combinatorial analysis
Communication
Computation offloading
Containers
Decisions
Disk caching
Edge computing
Electronic devices
Energy consumption
Energy efficiency
Iterative methods
Machine learning
Mobile computing
Neural networks
Optimization
Performance enhancement
Resource allocation
Servers
Training
User needs
Wearable computers
China
ISSN:2079-9292, 2079-9292
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Abstract Container technology enables rapid deployment of computing services, while edge computing reduces the latency of task computing and improves performance. However, there are limits to the types, number and performance of containers that can be supported by different edge servers, and a sensible task deployment strategy and rapid response to the policy is a must. Therefore, by jointly optimizing the strategies of task deployment, offloading decisions, edge cache and resource allocation, this paper aims to minimize the overall energy consumption of a mobile edge computing (MEC) system composed of multiple mobile devices (MD) and multiple edge servers integrated with different containers. The problem is formalized as a combinatorial optimization problem containing multiple discrete variables when constraints of container type, transmission power, latency, task offloading and deployment strategies are satisfied. To solve the NP-hard problem and achieve fast response for sub-optimal policy, this paper proposes an energy-efficient edge caching and task deployment policy based on Deep Q-Learning (DQCD). Firstly, the pruning and optimization of the exponential action space consisting of offloading decisions, task deployment and caching policy is completed to accelerate the training of the model. Then, the iterative optimization of the training model is completed using a deep neural network. Finally, the sub-optimal task deployment, offloading and caching policies are obtained based on the training model. Simulation results demonstrate that the proposed algorithm is able to converge the model in very few iterations and results in a great improvement in terms of reducing system energy consumption and policy response delay compared to other algorithms.
AbstractList Container technology enables rapid deployment of computing services, while edge computing reduces the latency of task computing and improves performance. However, there are limits to the types, number and performance of containers that can be supported by different edge servers, and a sensible task deployment strategy and rapid response to the policy is a must. Therefore, by jointly optimizing the strategies of task deployment, offloading decisions, edge cache and resource allocation, this paper aims to minimize the overall energy consumption of a mobile edge computing (MEC) system composed of multiple mobile devices (MD) and multiple edge servers integrated with different containers. The problem is formalized as a combinatorial optimization problem containing multiple discrete variables when constraints of container type, transmission power, latency, task offloading and deployment strategies are satisfied. To solve the NP-hard problem and achieve fast response for sub-optimal policy, this paper proposes an energy-efficient edge caching and task deployment policy based on Deep Q-Learning (DQCD). Firstly, the pruning and optimization of the exponential action space consisting of offloading decisions, task deployment and caching policy is completed to accelerate the training of the model. Then, the iterative optimization of the training model is completed using a deep neural network. Finally, the sub-optimal task deployment, offloading and caching policies are obtained based on the training model. Simulation results demonstrate that the proposed algorithm is able to converge the model in very few iterations and results in a great improvement in terms of reducing system energy consumption and policy response delay compared to other algorithms.
Audience Academic
Author Wang, Peng
Li, Yang
Ma, Li
Du, Chunlai
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SubjectTerms Algorithms
Analysis
Artificial neural networks
Augmented reality
Cache memory
Caching
Cellular telephones
Combinatorial analysis
Communication
Computation offloading
Containers
Decisions
Disk caching
Edge computing
Electronic devices
Energy consumption
Energy efficiency
Iterative methods
Machine learning
Mobile computing
Neural networks
Optimization
Performance enhancement
Resource allocation
Servers
Training
User needs
Wearable computers
Title Energy-Efficient Edge Caching and Task Deployment Algorithm Enabled by Deep Q-Learning for MEC
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