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Abstract
While LTE is becoming widely rolled out for human-type services, it is also a promising solution for cost-efficient connectivity of the smart grid monitoring equipment. This is a type of machine-to-machine (M2M) traffic that consists mainly of sporadic uplink transmissions. In such a setting, the amount of traffic that can be served in a cell is not constrained by the data capacity, but rather by the signaling constraints in the PRACH, PDCCH, and PUSCH channels. In this paper we explore these limitations using a detailed simulation of the LTE access reservation protocol (ARP). We find that 1) assigning RAOs more frequently sometimes worsens performance; and 2) the additional signaling that follows the ARP has very large impact on the capacity in terms of the number of supported devices; we observed a reduction in the capacity by almost a factor of 3. This suggests that a lightweight access method, with reduced number of signaling messages, needs to be considered in standardization for M2M applications. Additionally we propose a tractable analytical model that accurately evaluates the outage for a given scenario at click-speed. The model accounts for the features of the PRACH, PDCCH, PDSCH, and PUSCH, as well as retransmissions.
Original language | English |
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Journal | I E E E Journal on Selected Areas in Communications |
Volume | 34 |
Issue number | 3 |
Pages (from-to) | 675 - 688 |
ISSN | 0733-8716 |
DOIs | |
Publication status | Published - Mar 2016 |
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Dive into the research topics of 'Assessment of LTE Wireless Access for Monitoring of Energy Distribution in the Smart Grid'. Together they form a unique fingerprint.Projects
- 3 Finished
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WILLOW: WIreLess LOWband communications:massive and ultra-reliable access
Popovski, P., Nielsen, J. J., Trillingsgaard, K. F. & Kiilerich Pratas, N.
01/10/2015 → 01/10/2020
Project: Research
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SUNSEED: Sustainable and robust networking for smart electricity distribution
Stefanovic, C., Kiilerich Pratas, N. & Popovski, P.
01/02/2014 → 31/01/2017
Project: Research