Network management in decentralized data fusion networks

Simukai W. Utete; Hugh F. Durrant-Whyte

doi:10.1117/12.189071

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Abstract

Network management concerns the ability of a network to sustain continued correct operation. What constitutes correct operation of a network is dependent on the nature and application of the system. A decentralized data fusion system consists of a network of sensor nodes, each capable of local fusion of sensor data. The decentralized estimation algorithms described here are constrained to operate on fully connected and tree connected topologies. Neither topology is practical, both are vulnerable to the loss of a single link. Decentralized estimation in fully connected systems exploits the fact that direct communication is possible between every pair of nodes. The loss of any link changes the pattern of communication upon which the estimation algorithm is based. In a tree connected system, the loss of a single link can divide the network in two, stopping network-wide communication altogether. Management must maintain a continued flow of information throughout the network and along the routes which provide for the best overall network performance. Reliable routing depends on the existence of a range of routes and the ability to switch routes when failures occur. Decentralized data fusion management necessitates that the routing system operates within the constraints imposed on the sensing network. A management system which reconciles the requirement for redundant routes with the need for the maintenance of valid topologies is described. Thus, we provide for continued communication and estimation in a changing topological environment.

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Simukai W. Utete and Hugh F. Durrant-Whyte "Network management in decentralized data fusion networks", Proc. SPIE 2355, Sensor Fusion VII, (6 October 1994); https://doi.org/10.1117/12.189071

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