Departmental Papers (ESE)

Abstract

Resilience to electromagnetic jamming and its avoidance are difficult problems. It is often both hard to distinguish malicious jamming from congestion in the broadcast regime and a challenge to conceal the activity patterns of the legitimate communication protocol from the jammer. In the context of energy-constrained wireless sensor networks, nodes are scheduled to maximize the common sleep duration and coordinate communication to extend their battery life. This results in well-defined communication patterns with possibly predictable intervals of activity that are easily detected and jammed by a statistical jammer. We present an anti-jamming protocol for sensor networks which eliminates spatio-temporal patterns of communication while maintaining coordinated and contention-free communication across the network. Our protocol, WisperNet, is time-synchronized and uses coordinated temporal randomization for slot schedules and slot durations at the link layer and adapts routes to avoid jammers in the network layer. Through analysis, simulation and experimentation we demonstrate that WisperNet reduces the efficiency of any statistical jammer to that of a random jammer, which has the lowest censorship-to-link utilization ratio. WisperNet is more energy efficient than low-power listen CSMA protocols such as B-mac and is simple to analyze in terms of effective network throughput, reliability and delay. WisperNet has been implemented on the FireFly sensor network platform.

Document Type

Conference Paper

Date of this Version

9-2008

Comments

Suggested Citation:
Pajic, M. and R. Mangharam. ”WisperNet: Anti-Jamming for Wireless Sensor Networks”, 2nd Workshop on Embedded Systems Security (WESS’08), IEEE/ACM EMSOFT ’08 and the Embedded Systems Week. September 2008.

©2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

See more from the mLAB in ScholarlyCommons at Real-Time and Embedded Systems Lab (mLAB)

Keywords

Embedded systems, wireless networks, jamming, security, fault-tolerant systems, embedded systems, jamming, protocols, random processes, statistical analysis, synchronisation, telecommunication congestion control, telecommunication network reliability, wireless sensor networks, WisperNet time-synchronized protocol, anti jamming protocol, battery life maximization, censorship-to-link utilization ratio, communication protocol, contention-free communication, coordinated temporal randomization, electromagnetic jamming, embedded wireless network, energy-constrained wireless sensor network, link layer slot duration, link layer slot schedule, malicious jamming, node scheduling, random jammer, spatio-temporal pattern, statistical jammer, Anti-jamming, MAC protocol, wireless sensor networks

Share

COinS
 

Date Posted: 16 February 2010

This document has been peer reviewed.