Compressive sensing-based random access with multiple-sequence spreading for MTC

Ameha T. Abebe, Chung Gu Kang

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    18 Citations (Scopus)

    Abstract

    In this paper, we present a new structure for compressive sensing(CS)-based random access (RA) scheme for machine-type communications (MTC). In the proposed scheme, we consider a one-shot transmission in which users transmit their packets right away by spreading them with multiple spreading sequences (MS) over a frame without waiting for scheduling grant from the base station. The scheme is designed for delayconstrained & sporadic traffic where a massive number of users have a very low activity factor, small packet sizes and limited power. It has been shown that by employing the proposed scheme the channel access success rate can be increased without incurring additional detection complexity. In different regions of users' activity factor, two sources of random access failure have been identified. In the design of the MS scheme, the tradeoff between these two factors can be considered to optimize the system. For strictly delay-intolerant applications where retransmission is not allowed, it is shown that about 10 times more users can be supported by employing MS in comparison with a type of random access in long term evolution (LTE) network.

    Original languageEnglish
    Title of host publication2015 IEEE Globecom Workshops, GC Wkshps 2015 - Proceedings
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)9781467395267
    DOIs
    Publication statusPublished - 2016 Feb 18
    EventIEEE Globecom Workshops, GC Wkshps 2015 - San Diego, United States
    Duration: 2015 Dec 62015 Dec 10

    Other

    OtherIEEE Globecom Workshops, GC Wkshps 2015
    Country/TerritoryUnited States
    CitySan Diego
    Period15/12/615/12/10

    Keywords

    • Compressive Sensing
    • Group Orthogonal Matching Pursuit
    • Machine Type Communication
    • Random Acess
    • Sporadic Traffic
    • Spreading Spectrum

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Computer Networks and Communications
    • Communication

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