High Throughput Simulation Research for Intelligent Transportation Sensor Network
Weidong Yi · Jisuanji fangzhen · 2011
With growing traffic congestion,intelligent transportation system(ITS) has come into being.Traditional ITS uses road-embedded inductive loop for traffic detection while using cable transmission,causing high cost and difficult maintenance.In recent years,the wireless sensor network(WSN) which is easy to install and maintain has been used more and more in ITS.While the WSN used for ITS uses image sensors,requiring real-time transmission of a large amount of data.In this paper,focused on the intelligent transportation sensor network application requiring high throughput and low latency,FT-Sch,a MAC scheduling algorithm based on hybrid TDMA/FDMA scheme is proposed.Our research shows that,according to the two proposed scheduling principles,FT-Sch takes advantage of the relationship represented by the data-gathering tree topology to schedule time slots and frequency channels as a whole for sensor nodes,so as to maximize parallel transmission and be able to use the least number of time slots in one frame to ensure non-collision communication.Simulation results show that FT-Sch can provide higher network throughput and lower latency than MMSN and 1-channel TDMA-based MAC protocol.