A 2-hop LoRa Approach Based on Smart and Transparent Relay-Device
- 293 Downloads
LoRa is designed for long-range communication where devices are directly connected to the gateway, which removes typically the need of constructing and maintaining a complex multi-hop network. Nonetheless, even with the advantage of penetration of walls, the range may not sometimes be sufficient. This article describes a 2-hop LoRa approach to reduce both packet losses and transmission cost. To that aim, we introduce a smart, transparent and battery-operated relay-device that can be added after a deployment campaign to seamlessly provide an extra hop between the remote devices and the gateway. Field tests were conducted to assess relays’ ability to automatically synchronize to the network without advertising their presence.
KeywordsLoRa Low-power IoT Low-cost IoT Multihop Rural area
This work was supported by WAZIUP project which was funded by EU Horizon 2020 research and innovation program under grant agreement No 687607.
- 1.Semtech: LoRa modulation basics. Rev.2 (2015)Google Scholar
- 2.Pham, C., Rahim, A., Cousin, P.: Low-cost, long-range open IoT for smarter rural African Villages. In: Proceedings of ISC2, Italy (2016)Google Scholar
- 3.Pham, C., Dupont, C.: IoT, an affordable technology to empower African addressing needs in Africa. In: Proceedings of the IST-Africa, Namibia (2017)Google Scholar
- 4.Pham, C., Rahim, A., Cousin, P.: WAZIUP: a low-cost infrastructure for deploying IoT in developing countries. In: Proceedings of AFRICOMM, Ouagadougou (2016)Google Scholar
- 6.Sanfratello, A.: Enabling relay-based communication in LoRa networks for the Internet of Things. Master thesis. University of Pisa, Italy (2016)Google Scholar
- 7.Bor, M., Vidler, J.-E., Roedig, U.: LoRa for the internet of things. In: Proceedings of EWSN 2016, Graz, Austria, 361–366 (2016)Google Scholar
- 8.De Velde, B.-V.: Multi-hop lorawan: including a forwarding node (2017)Google Scholar
- 10.Dias, J.: LoRaWAN multi-hop uplink extension. Comput. Sci. 130, 424–431 (2018)Google Scholar
- 11.Lundell, D.: Ad-hoc network possibilities inside LoRaWAN. Thesis. Lund U (2017)Google Scholar
- 12.ETSI: Electromagnetic compatibility and Radio spectrum Matters (ERM); Short Range Devices (SRD); Radio equipment to be used in the 25 MHz to 1 000 MHz frequency range with power levels ranging up to 500 mW; Part 1: Technical characteristics and test methods (2012)Google Scholar