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Reconfigurable Intelligent Surface-assisted Edge Computing to Minimize Delay in Task Offloading

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posted on 04.10.2021, 12:19 by vikas kumarvikas kumar, Mithun MukherjeeMithun Mukherjee
The advantage of computational resources in edge computing near the data source has kindled growing interest in delay-sensitive Internet of Things (IoT) applications. However, the benefit of the edge server is limited by the uploading and downloading links between end-users and edge servers when these end-users seek computational resources from edge servers. The scenario becomes more severe when the user-end's devices are in the shaded region resulting in low uplink/downlink quality. In this paper, we consider a reconfigurable intelligent surface (RIS)-assisted edge computing system, where the benefits of RIS are exploited to improve the uploading transmission rate. We further aim to minimize the delay of worst-case in the network when the end-users either compute task data in their local CPU or offload task data to the edge server. Next, we optimize the uploading bandwidth allocation for every end-user's task data to minimize the maximum delay in the network. The above optimization problem is formulated as quadratically constrained quadratic programming. Afterward, we solve this problem by semidefinite relaxation. Finally, the simulation results demonstrate that the proposed strategy is scalable under various network settings.

Funding

Research on Optimal Allocation Method of Green Edge Computing Network Resources

National Natural Science Foundation of China

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1521632101005

History

Email Address of Submitting Author

vikas.tu@gmail.com

ORCID of Submitting Author

0000-0002-2358-2555

Submitting Author's Institution

Bharat Sanhar Nigam Limited

Submitting Author's Country

India