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Directional Transmissions and Receptions for High-throughput Bulk Forwarding in Wireless Sensor Networks
Uppsala University, Sweden.
RISE., Swedish ICT, SICS, Computer Systems Laboratory. Polytechnic University of Milan, Italy.ORCID-id: 0000-0003-4560-9541
RISE., Swedish ICT, SICS, Computer Systems Laboratory.ORCID-id: 0000-0003-3079-8095
RISE., Swedish ICT, SICS, Computer Systems Laboratory. Uppsala University, Sweden.ORCID-id: 0000-0002-2586-8573
2015 (engelsk)Inngår i: Proceedings of the 13th ACM Conference on Embedded Networked Sensor Systems (SenSys '15), 2015, 8, s. 351-364Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

We present DPT: a wireless sensor network protocol for bulk traffic that uniquely leverages electronically switchable directional (ESD) antennas. Bulk traffic is found in several scenarios and supporting protocols based on standard antenna technology abound. ESD antennas may improve performance in these scenarios; for example, by reducing channel contention as the antenna can steer the radiated energy only towards the intended receivers, and by extending the communication range at no additional energy cost. The corresponding protocol support, however, is largely missing. DPT addresses precisely this issue. First, while the network is quiescent, we collect link metrics across all possible antenna configurations. We use this information to formulate a constraint satisfaction problem (CSP) that allows us to find two multi-hop disjoint paths connecting source and sink, along with the corresponding antenna configurations. Domain-specific heuristics we conceive ameliorate the processing demands in solving the CSP, improving scalability. Second, the routing configuration we obtain is injected back into the network. During the actual bulk transfer, the source funnels data through the two paths by quickly alternating between them. Packet forwarding occurs deterministically at every hop. This allows the source to implicitly "clock" the entire pipeline, sparing the need of proactively synchronizing the transmissions across the two paths. Our results, obtained in a real testbed using 802.15.4-compliant radios and custom ESD antennas we built, indicate that DPT approaches the maximum throughput supported by the link layer, peaking at 21 4 kbit/s in the settings we test.

sted, utgiver, år, opplag, sider
2015, 8. s. 351-364
Emneord [en]
Bulk data transmissions, Directional antennas, Electronically controlled antennas, Wireless sensor networks
HSV kategori
Identifikatorer
URN: urn:nbn:se:ri:diva-24515DOI: 10.1145/2809695.2809720ISBN: 978-1-4503-3631-4 (tryckt)OAI: oai:DiVA.org:ri-24515DiVA, id: diva2:1043599
Konferanse
13th ACM Conference on Embedded Networked Sensor Systems (SenSys 2015), November 1-4, 2015, Seoul, South Korea
Prosjekter
SecThingsTilgjengelig fra: 2016-10-31 Laget: 2016-10-31 Sist oppdatert: 2019-07-10bibliografisk kontrollert

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