A Tractable Model of the LTE Access Reservation Procedure for Machine-Type Communications

Jimmy Jessen Nielsen, Dong Min Kim, Germán Corrales Madueño, Nuno Kiilerich Pratas, Petar Popovski

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

23 Citations (Scopus)
497 Downloads (Pure)


A canonical scenario in Machine-Type Communications (MTC) is the one featuring a large number of devices, each of them with sporadic traffic. Hence, the number of served devices in a single LTE cell is not determined by the available aggregate rate, but rather by the limitations of the LTE access reservation protocol. Specifically, the limited number of contention preambles and the limited amount of uplink grants per random access response are crucial to consider when dimensioning LTE networks for MTC. We propose a low-complexity model that encompasses these two limitations and allows us to evaluate the outage probability at click-speed. The model is based chiefly on closed-form expressions, except for the part with the feedback impact of retransmissions, which is determined by solving a fixed point equation. Our model overcomes the incompleteness of the existing models that are focusing solely on the preamble collisions. A comparison with the simulated LTE access reservation procedure that follows the 3GPP specifications, confirms that our model provides an accurate estimation of the system outage event and the number of supported MTC devices.
Original languageEnglish
Title of host publication2015 IEEE Global Communications Conference (GLOBECOM)
Number of pages6
PublisherIEEE Press
Publication date2015
ISBN (Electronic)978-1-4799-5952-5
Publication statusPublished - 2015
EventIEEE GLOBECOM 2015 - San Diego, CA, United States
Duration: 6 Dec 201510 Dec 2015


ConferenceIEEE GLOBECOM 2015
Country/TerritoryUnited States
CitySan Diego, CA
SeriesGlobecom. I E E E Conference and Exhibition


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