NeBuST: Low-latency congested sensor data transmission protocol

In wireless sensor networks, sensor data messages are transmitted to a sink node by using wireless multihop transmission with help of intermediate sensor nodes. In event-based sensor networks, no or few sensor data messages are transmitted in usual and burst sensor data messages are required to be transmitted when a sensor detects occurrence of a certain event. It may cause congestion along a multihop transmission route and result in lost messages by buffer-overflow and longer transmission delay. To solve this problem, we propose NeBuST protocol in which congested sensor data messages are buffered not only in the sensor nodes in the route but also in neighbor sensor nodes of the route. Simulation experiments show that the proposed protocol requires shorter transmission delay than the conventional data message buffering only in sensor nodes along the route.