Energy-latency tradeoffs for edge caching and dynamic service migration based on DQN in mobile edge computing
•A cooperative edge caching strategy based on energy-latency balance is proposed.•A dynamic service migration strategy based on deep Q-Network (DQN) is proposed.•The results show that our edge caching algorithm has lower latency and energy consumption.•The proposed service migration algorithm is sup...
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| Published in | Journal of parallel and distributed computing Vol. 166; pp. 15 - 31 |
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| Main Authors | , , , |
| Format | Journal Article |
| Language | English |
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Elsevier Inc
01.08.2022
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| Subjects | |
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| Abstract | •A cooperative edge caching strategy based on energy-latency balance is proposed.•A dynamic service migration strategy based on deep Q-Network (DQN) is proposed.•The results show that our edge caching algorithm has lower latency and energy consumption.•The proposed service migration algorithm is superior in migration cost and success rate.
Mobile edge computing sinks computing and storage capabilities to the edge of the network to provide reliable and low-latency services. However, the mobility of users and the limited coverage of edge servers can cause service interruptions and reduce service quality. A cooperative edge caching strategy based on energy-latency balance is proposed to solve high power consumption and latency caused by processing computationally intensive applications. In the cache selection phase, the request prediction method based on a deep neural network improves the cache hit rate. In the cache placement stage, the objective function is established by comprehensively considering power consumption and latency, and We use the branch-and-bound algorithm to get the optimal value. We propose an improved service migration method to solve the problem of service interruption caused by user movement. The service migration problem is modeled using a Markov decision process (MDP). The optimization goal is to reduce service latency and improve user experience under the premise of specified cost and computing resources. Finally, the optimal solution of the model is solved by the deep Q-Network (DQN) algorithm. Experiments show that our edge caching algorithm has lower latency and energy consumption than other algorithms in the same conditions. The service migration algorithm proposed in this paper is superior to different service migration algorithms in migration cost and success rate. |
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| AbstractList | •A cooperative edge caching strategy based on energy-latency balance is proposed.•A dynamic service migration strategy based on deep Q-Network (DQN) is proposed.•The results show that our edge caching algorithm has lower latency and energy consumption.•The proposed service migration algorithm is superior in migration cost and success rate.
Mobile edge computing sinks computing and storage capabilities to the edge of the network to provide reliable and low-latency services. However, the mobility of users and the limited coverage of edge servers can cause service interruptions and reduce service quality. A cooperative edge caching strategy based on energy-latency balance is proposed to solve high power consumption and latency caused by processing computationally intensive applications. In the cache selection phase, the request prediction method based on a deep neural network improves the cache hit rate. In the cache placement stage, the objective function is established by comprehensively considering power consumption and latency, and We use the branch-and-bound algorithm to get the optimal value. We propose an improved service migration method to solve the problem of service interruption caused by user movement. The service migration problem is modeled using a Markov decision process (MDP). The optimization goal is to reduce service latency and improve user experience under the premise of specified cost and computing resources. Finally, the optimal solution of the model is solved by the deep Q-Network (DQN) algorithm. Experiments show that our edge caching algorithm has lower latency and energy consumption than other algorithms in the same conditions. The service migration algorithm proposed in this paper is superior to different service migration algorithms in migration cost and success rate. |
| Author | Li, Chunlin Luo, Youlong Gao, Xiang Zhang, Yong |
| Author_xml | – sequence: 1 givenname: Chunlin surname: Li fullname: Li, Chunlin email: chunlin74@tom.com organization: School of Computer Science and Artificial Intelligence, Wuhan University of Technology, Wuhan 430063, PR China – sequence: 2 givenname: Yong surname: Zhang fullname: Zhang, Yong organization: School of Computer Science and Artificial Intelligence, Wuhan University of Technology, Wuhan 430063, PR China – sequence: 3 givenname: Xiang surname: Gao fullname: Gao, Xiang email: gaoxiang@suse.edu.cn organization: Key Laboratory of Higher Education of Sichuan Province for Enterprise Informationalization and Internet of Things, Sichuan University of Science & Engineering, Zigong, 643002, PR China – sequence: 4 givenname: Youlong surname: Luo fullname: Luo, Youlong organization: School of Computer Science and Artificial Intelligence, Wuhan University of Technology, Wuhan 430063, PR China |
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| SubjectTerms | Deep Q-Network Dynamic service migration Edge caching Energy-latency tradeoffs |
| Title | Energy-latency tradeoffs for edge caching and dynamic service migration based on DQN in mobile edge computing |
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