期刊
SENSORS
卷 22, 期 21, 页码 -出版社
MDPI
DOI: 10.3390/s22218360
关键词
opportunistic networks; Opportunistic Edge Computing; OEC systems; opportunistic IoT; bluetooth 5; decentralized IoT
资金
- Xunta de Galicia [ED431C 2020/15, ED431G 2019/01]
- ERDF Galicia 2014-2020
- MCIN/AEI [PID2020-118857RA]
IoT devices require connectivity to function properly, with wireless communication coverage being crucial; opportunistic networks and edge computing can enhance communication efficiency and speed for IoT devices; a study on Bluetooth 5 IoT nodes showed relatively low latency impacted by various factors.
IoT devices can be deployed almost anywhere, but they usually need to be connected to other IoT devices, either through the Internet or local area networks. For such communications, many IoT devices make use of wireless communications, whose coverage is key: if no coverage is available, an IoT device becomes isolated. This can happen both indoors (e.g., large buildings, industrial warehouses) or outdoors (e.g., rural areas, cities). To tackle such an issue, opportunistic networks can be useful, since they use gateways to provide services to IoT devices when they are in range (i.e., IoT devices take the opportunity of having a nearby gateway to exchange data or to use a computing service). Moreover, opportunistic networks can provide Edge Computing capabilities, thus creating Opportunistic Edge Computing (OEC) systems, which deploy smart gateways able to perform certain tasks faster than a remote Cloud. This article presents a novel decentralized OEC system based on Bluetooth 5 IoT nodes whose latency is evaluated to determine the feasibility of using it in practical applications. The obtained results indicate that, for the selected scenario, the average end-to-end latency is relatively low (736 ms), but it is impacted by factors such as the location of the bootstrap node, the smart gateway hardware or the use of high-security mechanisms.
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