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

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

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-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
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages2554-2559
    Number of pages6
    ISBN (Electronic)9781665435406
    DOIs
    Publication statusPublished - 2022
    Event2022 IEEE Global Communications Conference, GLOBECOM 2022 - Virtual, Online, Brazil
    Duration: 4 Dec 20228 Dec 2022

    Publication series

    Name2022 IEEE Global Communications Conference, GLOBECOM 2022 - Proceedings

    Conference

    Conference2022 IEEE Global Communications Conference, GLOBECOM 2022
    Country/TerritoryBrazil
    CityVirtual, Online
    Period4/12/228/12/22

    Keywords

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

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