Contention window prioritization for heterogeneous traffic in wireless sensor networks

Faculty / School

Faculty of Computer Sciences (FCS)


Department of Computer Science

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Document Type

Conference Paper

Publication Date


Author Affiliation

  • Anwar Ahmed Khan is Ph.D. Scholar at the Faculty of Computer Science, Institute of Business Administration, Karachi
  • Sayeed Ghani is Associate Dean Faculty of Computer Science at Institute of Business Administration, Karachi
  • Shama Siddiqui is Ph.D. Scholar at the Faculty of Computer Science, Institute of Business Administration, Karachi

Conference Name

International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing

Conference Location

Torino, Italy

Conference Dates

10-12 July 2017


85026349108 (Scopus)

First Page


Last Page



Springer, Cham

Abstract / Description

Dealing with heterogeneous traffic has become a major MAC layer challenge for the Wireless Sensor Networks (WSN) due to emerging applications. Most of the times, the service requirements for WSN applications differ based on the traffic type or priority. Among many other schemes, prioritization of Contention Window (CW) has been proposed in the past which offers advantage to the traffic of high priority. This research aims at analyzing the influence of prioritized CW scheme for the basic Carrier Sense Multiple Access (CSMA) protocol, frequently deployed for the contention based channels. The performance of CSMA with prioritized CW while dealing with heterogeneous traffic has been compared against the basic CSMA. Two types of traffics have been used to illustrate heterogeneous traffic and evaluate the proposed scheme. Performance metrics of throughput and average delay have been investigated in order to validate the advantage of using prioritized CW partitioning. The scheme has been implemented using Tiny-OS source code developed for the Mica2 platform. Avrora emulator has been used for conducting experiments. results have revealed a positive impact of using CSMA with prioritized CW on the network performance as compared to the basic CSMA.

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