Decentralized Multi-sink Data Transfer Protocol for Wireless Sensor Networks

In this paper, we propose a multi-sink data transfer protocol for wireless sensor networks, called negotiation-based multi-sink data transfer (NMDT). NMDT is based on the packet flooding method, but the direction of packet flooding in each sensor node is dynamically controlled, taking into consideration the network traffic around the sensor node. Thus, stable sensed data transfer and collection can be performed without packet collisions. After explaining NMDT in detail, we present some evaluation results. According to the evaluation results, NMDT can aggregate sensed data from the sensor nodes by more than 25% as compared to the ordinary flooding method.