11th EAI International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness

Research Article

To Random Access Or Schedule? Optimum 3GPP Licensed-Assisted Access for Machine-to-Machine Communications

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  • @INPROCEEDINGS{10.4108/eai.19-8-2015.2260365,
        author={SHAO-YU LIEN and Yueh Jir Wang},
        title={To Random Access Or Schedule? Optimum 3GPP Licensed-Assisted Access for Machine-to-Machine Communications},
        proceedings={11th EAI International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness},
        publisher={IEEE},
        proceedings_a={QSHINE},
        year={2015},
        month={9},
        keywords={m2m communications lte/lte-a laa iot applications},
        doi={10.4108/eai.19-8-2015.2260365}
    }
    
  • SHAO-YU LIEN
    Yueh Jir Wang
    Year: 2015
    To Random Access Or Schedule? Optimum 3GPP Licensed-Assisted Access for Machine-to-Machine Communications
    QSHINE
    IEEE
    DOI: 10.4108/eai.19-8-2015.2260365
SHAO-YU LIEN1,*, Yueh Jir Wang2
  • 1: National Formosa University
  • 2: National Chung-Shan Institute of Science and Technology
*Contact email: sylien@nfu.edu.tw

Abstract

To support various Internet-of-Thing (IoT) applications involving an enormous number of machine-type devices, deploying LTE/LTE-A networks on ISM bands with an extensive bandwidth has been regarded as a promising solution to enable machine-to-machine (M2M) communications. Designating as licensed-assisted access (LAA) in 3GPP Rel-13, unprecedented challenge of uncontrollable interference from collocated WiFi networks, however, obstructs the state-of-the-art scheduling based radio resource access in LTE/LTE-A. To practice LAA, in this paper, we shall derive the optimum radio access scheme for the urgent needs of 3GPP Rel-13 standardization. Observing the LAA-WiFi hidden terminal problem, we analytically derive the optimum number of LAA users randomly accessing a pool of radio resources and the optimum condition for random access, to reach a superior throughput of a LAA network as compared with that of a scheduling based scheme. Our analytic results demonstrate that the conventional scheduling based scheme in LTE/LTE-A may not always be optimal, and thus our proposition leads to the optimum radio access design for LAA networks.