RIS-assisted Task Offloading for Wireless Dead Zone to Minimize Delay in Edge Computing

Mithun Mukherjee, Vikas Kumar, Suman Kumar, Constandinos X. Mavromoustakis, Qi Zhang, Mian Guo

Research output: Contribution to book/anthology/report/proceedingArticle in proceedingsResearchpeer-review

Abstract

End-users under poor wireless network coverage generally suffer from underutilization of bandwidth. This adversely affects the overall performance of task offloading to the edge server. In this work, we study a Reconfigurable Intelligent Surface (RIS)-assisted wireless network that enables end-user's devices under weak signal reception areas to enhance their offloading opportunities for delay minimization. It becomes a challenging task to allocate uploading bandwidth allocation for the offloaded tasks from end-user devices under different signal coverage areas. We formulate the optimization problem of bandwidth allocation for the offloaded tasks in the edge server and the offloading decisions as a quadratically constrained quadratic problem. We exploit a semi-definite relaxation (SDR) method to solve the problem. Moreover, during optimization, we minimize the adverse impact of bandwidth allocation for poor end-users on good end-users performance. From extensive simulation results, we show remarkably elevated improvement in delay reduction with RIS assistance compared to other baselines, increasing the number and ratio of end-user devices under good and poor signal reception areas.

Original languageEnglish
Title of host publication2022 IEEE Global Communications Conference, GLOBECOM 2022 - Proceedings
Number of pages6
PublisherIEEE
Publication dateDec 2022
Pages2554-2559
ISBN (Print)978-1-6654-3541-3
ISBN (Electronic)978-1-6654-3540-6
DOIs
Publication statusPublished - Dec 2022
EventIEEE Global Communications Conference 2022: Hybrid: In-Person and Virtual Conference Accelerating the Digital Transformation through Smart Communications - Rio de Janeiro, Brazil
Duration: 4 Dec 20228 Dec 2022
https://globecom2022.ieee-globecom.org/

Conference

ConferenceIEEE Global Communications Conference 2022
Country/TerritoryBrazil
CityRio de Janeiro
Period04/12/202208/12/2022
Internet address

Keywords

  • Mobile edge computing
  • deadline-aware task offloading
  • edge computing
  • offloading
  • reconfigurable intelligent surfaces

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