Data Dissemination Protocols In Wireless Sensor Networks : Design, Modeling And Security

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Title: Data Dissemination Protocols In Wireless Sensor Networks : Design, Modeling And Security
Author: De, Pradip
Abstract: Wireless sensor and actuator networks have been one of the stepping stones towards realizing a pervasive computing infrastructure . However , in a post -deployment scenario , transferring critical updates and reconfigurations on a network -wide scale is a non -trivial proposition . Wireless techniques provide the only means of communication , and consequently , an in -depth study of the multihop broadcast based communication paradigm and the design of efficient and reliable data dissemination protocols for reprogramming a sensor network is of paramount importance . In this dissertation , we initially focus on the formal modeling and performance analysis of broadcast -based data dissemination protocols in wireless sensor networks . The data propagating in the network could be either small configuration information to be shared by all the nodes or a large code image required for reprogramming the network . In order to better understand the propagation behavior , we construct a mathematical model that allows us to compare different dissemination protocols in terms of their speed of propagation and extent of network reachability . Next , from a perspective of security , we investigate the potentially disastrous threat of node compromise originating from a single node infected with a piece of malware , propagating to other nodes and gradually compromising the entire sensor network . Focusing on the possible epidemic breakout of such a propagation , we model and analyze this spreading process and identify key factors determining potential outbreaks . More importantly , we compare the propagation process based on different sensor deployment strategies , for instance , uniform and group -based deployment , thereby getting valuable insights for designing secure networks . Subsequently , we delve onto a specific case of a malware spreading over existing data dissemination protocols in sensor networks . In order to better understand these protocols' vulnerability to piggybacked virus attacks , we construct a mathematical model for the malware infection , incorporating important parameters derived from the communication patterns of the protocol under test . We further enrich our study by observing the effects of a simultaneous recovery process on the infection propagation . The overall result is an approximate but flexible framework to characterize a broadcast protocol in terms of its vulnerability to malware propagation . Having focused on analyzing data dissemination techniques in static sensor networks , we observe that existing data dissemination protocols are inefficient in a mobile environment and require effective modifications to suit the uncertainties and demands of network mobility . Thus , we propose a novel wireless multihop data dissemination protocol , suitable to a mobile sensor network and evaluate it through extensive simulations as well as real testbed implementation on a network of SunSPOT devices . Our results indicate an improved performance of our protocol over existing reprogramming protocols , both in terms of completion time and total number of messages transmitted in the network .
URI: http : / /hdl .handle .net /10106 /967
Date: 2008-08-08

Citation

Data Dissemination Protocols In Wireless Sensor Networks : Design, Modeling And Security. Available electronically from http : / /hdl .handle .net /10106 /967 .

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