Murphy loves CI

Unfolding and Improving Constructive Interference in WSNs

Conference paper (2016)

Authors

V.S. Rao Embedded Systems - EEMCS
M. Koppal Indian Institute of Science
Ranga Rao Venkatesha Prasad Embedded Systems - EEMCS
TV Prabhakar Indian Institute of Science
C. Sarkar Embedded Systems - EEMCS
I.G.M.M. Niemegeers EEMS - General
Research Group
Embedded Systems (EEMCS) (TU Delft)
Synchronization Interference Reliability Wireless sensor networks Receivers Wireless communication Radio transmitters
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Published Date

2016

Language

English

Reuse Rights

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Software Technology

Research Group

Embedded Systems

Abstract

Constructive Interference (CI) phenomenon has been exploited by Glossy, a mechanism for low-latency and reliable network flooding and time synchronization for wireless sensor networks. Recently, CI has also been used for other applications such as data collection and multicasting in static and mobile WSNs. These applications base their working on the high reliability promised by Glossy regardless of the physical conditions of deployment, number of nodes in the network, and unreliable wireless channels that may be detrimental for CI. There are several works that study the working of CI, but they present inconsistent views. We study CI from a receiver's viewpoint, list factors that affect CI and also specify how and why they affect. We validate our arguments with results from extensive and rigorous experimentation in real-world settings. This paper presents comprehensive insights into CI phenomenon. With this understanding, we improve the performance of CI through an energy-efficient and distributed algorithm. We cause destructive interference on a designated byte to provide negative feedback. We leverage this to adapt transmission powers. Compared to Glossy, we achieve 25% lesser packet losses while using only half of its transmission power.