Volume : III, Issue : V, May - 2014

Multi–Level Network Scheduling Scheme for Wireless Sensor Network

Manasa I P, Balasubramani R

Abstract :

Among  many network design issues, such as routing protocols and data aggregation, that reduce sensor energy consumption and data transmission delay, packet scheduling (interchangeably use as task scheduling) at sensor nodes is highly important since it ensures delivery of different types of data packets based on their priority and fairness with a minimum latency. For instance, data sensed for real–time applications have higher priority than data sensed for non–real time applications.Though extensive research for scheduling the sleep–wake times of sensor nodes has been conducted, only a few studies exist in the literature on the packet scheduling of sensor nodes that schedule the processing of data packets available at a sensor node and also reduces energy consumptions. Indeed, most existing Wireless Sensor Network (WSN) operating systems use First Come First Serve (FCFS) schedulers that process data packets in the order of their arrival time and, thus, require a lot of time to be delivered to a relevant base station (BS). However, to be meaningful, sensed data have to reach the BS within a specific time period or before the expiration of a deadline. Additionally, real–time emergency data should be delivered to BS with the shortest possible end–to–end delay. Hence, intermediate nodes require changing the delivery order of data packets in their ready queue based on their importance (e.g., real or non–real time) and delivery deadline. Furthermore, most existing packet scheduling algorithms of WSN are neither dynamic nor suitable for large scale applications since these schedulers are predetermined and static, and cannot be changed in response to a change in the application requirements or environments. For example, in many real time applications, a real–time priority scheduler is statically used and cannot be changed during the operation of WSN applications

Keywords :

Article: Download PDF   DOI : 10.36106/ijsr  

Cite This Article:

MANASA I P, BALASUBRAMANI R "Multi-Level Network Scheduling Scheme for Wireless Sensor Network International Journal of Scientific Research, Vol.III, Issue. V, May 2014

Number of Downloads : 641

References :