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Latency-Energy Tradeoff based on ChannelScheduling and Repetitions in NB-IoT Systems
KTH, School of Electrical Engineering and Computer Science (EECS), Communication Systems, CoS, Radio Systems Laboratory (RS Lab).ORCID iD: 0000-0003-0125-2202
KTH, School of Electrical Engineering and Computer Science (EECS), Communication Systems, CoS, Radio Systems Laboratory (RS Lab).
Aalborg University.
Aalborg University.
2018 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Narrowband IoT (NB-IoT) is the latest IoT connectivitysolution presented by the 3GPP. NB-IoT introduces coverageclasses and introduces a significant link budget improvementby allowing repeated transmissions by nodes that experiencehigh path loss. However, those repetitions necessarily increase theenergy consumption and the latency in the whole NB-IoT system.The extent to which the whole system is affected depends on thescheduling of the uplink and downlink channels. We addressthis question, not treated previously, by developing a tractablemodel of NB-IoT access protocol operation, comprising messageexchanges in random-access, control, and data channels, bothin the uplink and downlink. The model is then used to analyzethe impact of channel scheduling as well as the interaction ofcoexisting coverage classes, through derivation of the expectedlatency and battery lifetime for each coverage class. These resultsare subsequently employed in investigation of latency-energytradeoff in NB-IoT channel scheduling as well as determiningthe optimized operation points. Simulations results show validityof the analysis and confirm that there is a significant impact ofchannel scheduling on latency and lifetime performance of NBIoTdevices.

Place, publisher, year, edition, pages
2018.
Keywords [en]
NB-IoT, Latency energy tradeoff, repetition, multiplexing
Keywords [fa]
انرژی تاخیر، اینترنت اشیاء باند باریک، تکرار سیگنال
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-232211OAI: oai:DiVA.org:kth-232211DiVA, id: diva2:1233076
Conference
IEEE Global Communications Conference, 9-13 December 2018, Abu Dhabi, UAE
Note

QC 20180716

Available from: 2018-07-15 Created: 2018-07-15 Last updated: 2018-07-16Bibliographically approved

Open Access in DiVA

fulltext(719 kB)13 downloads
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CiteExportLink to record
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Citation style
  • apa
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