Imroving Performance of WSN using Low Latency SINR Based Data Gathering

Abstract

Data gathering is an essential operation in wireless sensor network (WSN) where all nodes senses
information and forwards that data to base station (sink node) by multihop wireless communication. Typically data in
WSN relayed over a tree type of topology to sink for their effective data gathering. In scenarios of real-time data
collection in long-term deployed Wireless Sensor Networks (WSNs), low-latency data collection and long network
lifetime become key issue.We propose Low Latency SINR based data gathering scheme in wireless sensor networks. The
objective of the proposed scheme is to minimize delays in the data collection processes of wireless sensor networks. In
the first phase of our proposed scheme, Data gathering tree is constructed iteratively based on reliability model. In the
second phase, active links are scheduled on the tree for data transmission and transmitting power is assigned to each
active link accordingly. Since the reliability of a link is highly related to its signal to interference plus noise ratio
(SINR), the SINR of all the currently used links on the data gathering tree should be greater than a threshold to
guarantee high reliability. Simulation results show that, when comparing with other common network structures in
wireless sensor networks, the proposed scheme is able to shorten the delays in the data collection process significantly.