D2D-LoRa Latency Analysis: An Indoor Application Perspective

Nazmus Saqib, Khandaker Foysal Haque, Kumar Yelamarthi, Prasanath Yanambaka, Ahmed Abdelgawad

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


LoRaWAN is one of the popular Internet of Things (IoT) wireless technologies due to its versatility, long transmission range, and low power communication capabilities. In LoRaWAN, the data from the source to the destination is routed through the gateways, increasing the communication latency. The higher latency being a barrier in real-time applications has prompted researchers to employ the physical (PHY) layer of the LoRaWAN protocol -commonly termed as LoRa, which utilizes the Device-to-Device (D2D) based communication techniques to minimize the communication latency. However, an extensive analysis of the D2D-LoRa is needed for optimizing and better designing the network, which is missing in the current literature. To address the void, this paper analyzes the latency performance of the D2D based LoRa by varying Spreading Factors (SF) and bandwidths and explores the trade-offs with experimental deployment in a 110 m long indoor environment. The evaluation shows that with SF 7 and bandwidth 500 kHz, the communication latency is minimum which is 33.67 ms at 0 m and 53 ms at 110 m for the data packet of 13 bytes for each of the cases.

Original languageEnglish
Title of host publication7th IEEE World Forum on Internet of Things, WF-IoT 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781665444316
StatePublished - Jun 14 2021
Event7th IEEE World Forum on Internet of Things, WF-IoT 2021 - New Orleans, United States
Duration: Jun 14 2021Jul 31 2021

Publication series

Name7th IEEE World Forum on Internet of Things, WF-IoT 2021


Conference7th IEEE World Forum on Internet of Things, WF-IoT 2021
Country/TerritoryUnited States
CityNew Orleans


  • Bandwidth
  • D2D-LoRa
  • Latency analysis
  • Round trip latency
  • Spreading Factor
  • keywords-LoRa


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