Xianjin Xia
ABSTRACT
LoRaWAN has emerged as a promising communication paradigm to connect Internet-of-Things over wide areas. However, LoRaWANs suffer dramatic performance degradation when deployed inside a building, due to fast attenuation of signal strength. We explore to combine the signals received by multiple gateways to boost the communication quality over weak connections. In this poster, we address the core problem of how to synchronize frequency and phase among distributed receivers. We present a synchronization method to estimate frequency and phase offsets from the signals transmitted by COTS LoRa nodes. The method is light-weight and can achieve precise synchronization among distributed gateways.
- Ningning Hou and Yuanqing Zheng. 2020. CloakLoRa: A Covert Channel over LoRa PHY. In Proc. 28th IEEE Int. Conf. Netw. Protocols (ICNP). 1--9.Google Scholar
Cross Ref
- Mads Lauridsen, Istvan Z. Kovacs, Preben Mogensen, Mads Sorensen, and Steffen Holst. 2016. Coverage and Capacity Analysis of LTE-M and NB-IoT in a Rural Area. In Proceedings of IEEE 84th Vehicular Technology Conference ((VTC-Fall 2016)). 1--5.Google ScholarCross Ref
- SigFox. 2020. SigFox Overview. In https://www.sigfox.com/en/sigfox-iot-technology-overview.Google Scholar
- Shuai Tong, Jiliang Wang, and Yunhao Liu. 2020. Combating Packet Collisions Using Non-Stationary Signal Scaling in LPWANs. In Proceedings of the 18th International Conference on Mobile Systems, Applications, and Services (MobiSys '20). 234--246.Google ScholarDigital Library
- Xianjin Xia, Yuanqing Zheng, and Tao Gu. 2019. FTrack: Parallel decoding for LoRa transmissions. In Proceedings of the 17th Conference on Embedded Networked Sensor Systems. 192--204.Google ScholarDigital Library
- Xianjin Xia, Yuanqing Zheng, and Tao Gu. 2020. LiteNap: Downclocking LoRa Reception. In IEEE INFOCOM'20. 2321--2330.Google Scholar
Index Terms
- Connecting LoRaWANs Deep Inside a Building
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