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Wireless Networks
Published in: Wireless Networks 8/2021

25-10-2021 | Original Paper

Latency-aware content caching and cost-aware migration in SDN based on MEC

Authors: Chunlin Li, Lei Zhu, Youlong Luo

Published in: Wireless Networks | Issue 8/2021

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Abstract

In the mobile edge computing environment, edge servers, edge base stations and other intermediate servers have limited computing, storage resources and limited coverage, resulting in increased content access delays and reduced user experience quality. Content caching methods based on file value and corresponding algorithms are proposed. This method uses Markov chains to predict the mobile user's trajectory in the next time slot, and active caching and cache replacement algorithms are designed to minimize content access latency. In addition, because edge servers are connected to many different access points or base stations, whether or not to migrate the ongoing edge services and where to migrate the services are the key issues to consider when any user moves outside the service area of the related edge servers. To reduce the overhead of service migration due to the mobility of users and the complex topological relationship between edge servers, a de-centralized service migration algorithm is proposed, which integrates the analysis and selection of the optimal edge base station and service placement decisions with the objective of minimizing the overhead of service migration. The experimental results show that the proposed edge caching and service migration methods reduce content access latency and service migration overhead.
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Metadata
Title
Latency-aware content caching and cost-aware migration in SDN based on MEC
Authors
Chunlin Li
Lei Zhu
Youlong Luo
Publication date
25-10-2021
Publisher
Springer US
Published in
Wireless Networks / Issue 8/2021
Print ISSN: 1022-0038
Electronic ISSN: 1572-8196
DOI
https://doi.org/10.1007/s11276-021-02813-w

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