On-demand Geographic Forwarding for data delivery in wireless sensor networks
A purely on-demand network protocol, called On-demand Geographic Forwarding (OGF), is proposed for data delivery in large-scale and resource-constrained static wireless sensor networks with unreliable sensors. OGF is a cross-layer protocol that employs (i) an explicit contention scheme to establish a next-hop node in a distributed fashion, (ii) a simple scheme using a forwarding table to maintain the learned next-hop information, and (iii) a novel partial source routing scheme to handle communication voids. The operation of our protocol is based on the actual demands of the application, data traffic, and network dynamics. Packet-level simulations show that OGF exhibits a superior performance in terms of energy consumption, scalability, and void handling. Our study demonstrates that OGF is viable for efficient data delivery in the targeted sensor networks. (C) 2007 Elsevier B.V. All rights reserved.
geographic forwarding data delivery sensor networks communication void