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Collaborative assessment of functional reliability in wireless networks

Feng, Z and Pelechrinis, K and Krishnamurthy, S and Swami, A and Wu, F and Singh, MP (2012) Collaborative assessment of functional reliability in wireless networks. In: UNSPECIFIED UNSPECIFIED, 425 - 433. ISBN 9781467324335

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Abstract

Nodes that are part of a multihop wireless network, typically deployed in mission critical settings, are expected to perform specific functions. Establishing a notion of reliability of the nodes with respect to each function (referred to as functional reliability or FR) is essential for efficient operations and management of the network. This is typically assessed based on evidence collected by nodes with regards to other nodes in the network. However, such evidence is often affected by factors such as channel induced effects and interference. In multihop contexts, unreliable intermediary relays may also influence evidence. We design a framework for collaborative assessment of the FR of nodes, with respect to different types of functions; our framework accounts for the above factors that influence evidence collection. Each node (say Chloe) in the network derives the FR of other nodes (say Jack) based on two types of evidence: (i) direct evidence, based on her direct transactions with each such node and (ii) indirect evidence, based on feedback received regarding Jack from others. Our framework is generic and is applicable in a variety of contexts. We also design a module that drastically reduces the overhead incurred in the propagation of indirect evidence at the expense of slightly increased uncertainty in the assessed FR values. We implement our framework on an indoor/outdoor wireless testbed. We show that with our framework, each node is able to determine the FR for every other node in the network with high accuracy. Our indirect evidence propagation module decreases the overhead by 37% compared to a simple flooding based evidence propagation, while the accuracy of the FR computations is decreased only by 8%. Finally, we examine the effect of different routing protocols on the accuracy of the assessed values. © 2012 IEEE.


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Details

Item Type: Book Section
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Feng, Z
Pelechrinis, Kkpele@pitt.eduKPELE
Krishnamurthy, S
Swami, A
Wu, F
Singh, MP
Date: 1 December 2012
Date Type: Publication
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Journal or Publication Title: MASS 2012 - 9th IEEE International Conference on Mobile Ad-Hoc and Sensor Systems
Page Range: 425 - 433
Event Type: Conference
DOI or Unique Handle: 10.1109/mass.2012.6502543
Institution: University of Pittsburgh
Schools and Programs: School of Information Sciences > Telecommunications
Refereed: Yes
ISBN: 9781467324335
Date Deposited: 28 May 2013 16:21
Last Modified: 02 Feb 2019 16:55
URI: http://d-scholarship.pitt.edu/id/eprint/18811

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