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Spatiotemporal Model for Uplink IoT Traffic: Scheduling and Random Access Paradox

ElSawy, Hesham et al.

IEEE transactions on wireless communications. Volume 17:Number 12 (2018, December 7th); pp 8357-8372 -- Institute of Electrical and Electronics Engineers

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  • Title:
    Spatiotemporal Model for Uplink IoT Traffic: Scheduling and Random Access Paradox
  • Author: ElSawy, Hesham;
    Yang, Hong-Chuan;
    Bader, Ahmed;
    Alouini, Mohamed-Slim;
    Gharbieh, Mohammad
  • Found In: IEEE transactions on wireless communications. Volume 17:Number 12 (2018, December 7th); pp 8357-8372
  • Journal Title: IEEE transactions on wireless communications
  • Subjects: Wireless communication systems--Periodicals; Interference--Signal to noise ratio--Scalability--Internet of Things--Wireless communication--Spatiotemporal phenomena--Data communication--Stochastic processes--Queueing analysis; Internet of Things (IoT)--uplink transmission--grant-based access--grant-free access--stochastic geometry--queueing theory--stability analysis--interacting queues; Dewey: 384.5
  • Rights: Licensed
  • Publication Details: Institute of Electrical and Electronics Engineers
  • Abstract: The Internet-of-Things (IoT) is the paradigm where anything will be connected. There are two main approaches to handle the surge in uplink (UL) traffic that the IoT is expected to generate, namely, scheduled UL (SC-UL) and random access uplink (RA-UL) transmissions. SC-UL is perceived as a viable tool to control quality-of-service levels while entailing some overhead in the scheduling request prior to any UL transmission. On the other hand, RA-UL is a simple single-phase transmission strategy. While this obviously eliminates scheduling overheads, very little is known about the scalability of RA-UL. At this critical junction, there is a dire need to analyze the scalability of these two paradigms. To that end, this paper develops a spatiotemporal mathematical framework to analyze and assess the performance of SC-UL and RA-UL. The developed paradigm jointly utilizes stochastic geometry and queuing theory. Based on such a framework, we show that the answer to the scheduling versus random access paradox actually depends on the operational scenario. Particularly, the RA-UL scheme offers low access delays but suffers from limited scalability, i.e., cannot support a large number of IoT devices. On the other hand, SC-UL transmission is better suited for higher device intensities and traffic rates.
  • Identifier: System Number: ETOCvdc_100075506964.0x000001; Journal ISSN: 1536-1276; 10.1109/TWC.2018.2876522
  • Publication Date: 2018
  • Physical Description: Electronic
  • Shelfmark(s): 4363.231450
  • UIN: ETOCvdc_100075506964.0x000001

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