bullet Sensors & Transducers Journal

    (ISSN 1726-5479)


2008 e-Impact Factor

25 Top Downloaded Articles

Best Selling Articles 2012

Journal Subscription 2014

Editorial Calendar

Submit an Article

Editorial Board

Current Issue

S&T journal's cover

Sensors & Transducers Journal 2011

Sensors & Transducers Journal 2010

Sensors & Transducers Journal 2009

Sensors & Transducers Journal 2008

Sensors & Transducers Journal 2007

2000-2002 S&T e-Digest Contents

2003 S&T e-Digest Contents

2004 S&T e-Digest Contents

2005 S&T e-Digest Contents

2006 S&T e-Digest Contents


Best Articles 2011




Vol. 161, Issue 12, December 2013, pp. 472-481




Software Techniques for Maximizing Network Functionality in Duty Cycle Restricted ISM Bands
Eoin O'Connell, Victor Cionca, Brendan O'Flynn

Tyndall National Institute, University College Cork, Ireland
E-mail: eoin.oconnell@tyndall.ie


Received: 23 September 2013   /Accepted: 22 November 2013   /Published: 30 December 2013

Digital Sensors and Sensor Sysstems


Abstract: In this paper, a technique is presented which allows users of license free ISM bands to increase functionality of the wireless network while remaining within the maximum legally allowed transmit duty cycle requirements. We show through analytical modeling and empirical evaluation, that traditional MAC and routing techniques result in a significant increase in the overall TX duty cycle when sensor sample frequencies are increased. Specifically, we focus on the 868 MHz ISM band where the maximum allowed legal TX duty cycle must be < 1 %. Two novel techniques are presented that significantly reduce the TX duty cycle. The result of implementing these techniques is a reduction in power consumption and more importantly, an increase in network functionality while remaining within the legal requirements. We show that these techniques allow for sensor readings to be collected far more frequently in multi-hop, receiver duty cycled, wireless sensor networks. Results from a 50 node deployment are also presented to validate the model with empirical results.


Keywords: 868 MHz limitations, Duty Cycle, Low Power, WSN, Multi-Hop.


Acrobat reader logo Click <here> or title of paper to download the full pages article in pdf format



Download <here> the Library Journal Recommendation Form



Read more about Wireless Sensor Networks






1999 - 2018 Copyright , International Frequency Sensor Association (IFSA). All Rights Reserved.

Home - News - Links - Archives - Tools - Voltage-to-Frequency Converters - Standardization - Patents - Marketplace - Projects - Wish List - e-Shop - Sensor Jobs - Membership - Videos - Publishing - Site Map - Subscribe - Search

 Members Area -Sensors Portal -Training Courses - S&T Digest - For advertisers - Bookstore - Forums - Polls - Submit Press Release - Submit White Paper - Testimonies - Twitter - Facebook - LinkedIn