EURASIP Journal on Wireless Communications and Networking
On-demand multipath protocol with adaptive routing method by back propagation neural networks
International Journal of Communication Networks and Distributed Systems
AODV-based multipath routing protocol with preferential path selection probabilities
International Journal of Wireless and Mobile Computing
Ad-hoc wireless body area network for augmented cognition sensors
FAC'07 Proceedings of the 3rd international conference on Foundations of augmented cognition
Reliability-Latency tradeoffs for data gathering in random-access wireless sensor networks
GCC'05 Proceedings of the 4th international conference on Grid and Cooperative Computing
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We have been studying communication in wireless adhoc sensor networks. One of the authors has designed the Multipath On-demand Routing (MOR) protocol [4], which makes use of all possible paths to a given destination. Each node in MOR has, wherever possible, a choice of next hops for a given destination. We have designed and implemented a MOR reliability layer to take advantage of this. The basic strategy is to use a different node on eachretransmission, and to keep track of which transmissions are successful. The main benefit is that a packet is likely to be delivered even if a given neighbor is temporarily unavailable, thus improving the delivery ratio or decreasing the number of end-to-end retransmissions. A furtherbenefit is that nonresponsive nodes are removed from the routing table after a number of consecutive failures.In a sensor network transmission may be unreliable for a number of reasons, but particularly when congestion results in collisions. Without our reliability layer, collisions would cause packet loss and route loss. If the transport protocol is reliable, this results in end-to-end retransmission, which requires additional energy. We simulated transmission in congested conditions in different realistic sensor networks and compared MOR to available protocols. In our tests, the reliability layer helped MOR deliver data faster and using less energy than the other protocols.