Querying on Federated Sensor Networks

Abstract

A Federated Sensor Network (FSN) is a network of geographically distributed Wireless Sensor Networks (WSNs) called islands. For querying on an FSN, we introduce the Layered Federated Sensor Network (L-FSN) Protocol. For layered management, L-FSN provides communication among islands by its inter-island querying protocol by which a query packet routing path is determined according to some path selection policies. L-FSN allows autonomous management of each island by island-specific intra-island querying protocols that can be selected according to island properties. We evaluate the applicability of L-FSN and compare the L-FSN protocol with various querying protocols running on the flat federation model. Flat federation is a method to federate islands by running a single querying protocol on an entire FSN without distinguishing communication among and within islands. For flat federation, we select a querying protocol from geometrical, hierarchical cluster-based, hash-based, and tree-based WSN querying protocol categories. We found that a layered federation of islands by L-FSN increases the querying performance with respect to energy-efficiency, query resolving distance, and query resolving latency. Moreover, L-FSN's flexibility of choosing intra-island querying protocols regarding the island size brings advantages on energy-efficiency and query resolving latency.

Flexible network management and application service adaptability in software defined wireless sensor networks

“…To compare and validate the efficiency of the OpenFlow protocol, the implemented system uses Border Gateway Protocol (BGP) and Network Configuration (NETCONF) protocols. BGP ensures that data is transmitted with minimum latency over the Internet between autonomous systems and provides alternative paths in case of route failure (Can and Demirbas 2016). NETCONF provides control and network management functionalities in SDN networks (Dallaglio et al 2017).…”