Collaborative Event-Driven Coverage and Rate Allocation for Event Miss-Ratio Assurances in Wireless Sensor Networks

Wireless sensor networks are often required to provide event miss-ratio assurance for a given event type. To meet such assurances along with minimum energy consumption, this paper shows how a node's activation and rate assignment is dependent on its distance to event sources, and proposes a practical coverage and rate allocation protocol (CORA) protocol to exploit this dependency in realistic environments. Both uniform event distribution and non-uniform event distribution are considered and the notion of ideal correlation distance around a cluster-head is introduced for on-duty node selection. In correlation distance guided CORA, rate assignment assists coverage scheduling by determining which nodes should be activated for minimizing data redundancy in transmission. Coverage scheduling assists rate assignment by controlling the amount of overlap among sensing regions of neighboring nodes, thereby providing sufficient data correlation for rate assignment. Extensive simulation resul...

• Type: Journal
• Year: 2010
• Where: EJWCN
• Authors: Hidayet Ozgur Sanli, Hasan Çam
• Keywords: Correlation Distance, EJWCN 2010, Rate Allocation, Rate Assignment