Performance Evaluation and Comparative Analysis of SubCarrier Modulation Wake-up Radio Systems for Energy-Efficient Wireless Sensor Networks

Sensors

Joaquim Oller²  Ilker Demirkol²  Jordi Casademont²  Josep Paradells²  Gerd Ulrich Gamm¹ 

[1] Institut für Mikrosystemtechnik—IMTEK, Albert-Ludwigs-Universität Freiburg, Georges-Köhler-Allee 103, Freiburg 79110, Germany; E-Mails:;Department of Telematics Engineering, Universitat Politècnica de Catalunya, C/Jordi Girona 1-3, Barcelona 08034, Spain; E-Mails:

关键词: wake-up radio;    wake-up receiver;    wireless sensor networks;    low-power communication;    energy-efficient networking;    performance analysis;   

DOI  :  10.3390/s140100022

来源: mdpi

【 摘 要 】

Energy-efficient communication is one of the main concerns of wireless sensor networks nowadays. A commonly employed approach for achieving energy efficiency has been the use of duty-cycled operation of the radio, where the node's transceiver is turned off and on regularly, listening to the radio channel for possible incoming communication during its on-state. Nonetheless, such a paradigm performs poorly for scenarios of low or bursty traffic because of unnecessary activations of the radio transceiver. As an alternative technology, Wake-up Radio (WuR) systems present a promising energy-efficient network operation, where target devices are only activated in an on-demand fashion by means of a special radio signal and a WuR receiver. In this paper, we analyze a novel wake-up radio approach that integrates both data communication and wake-up functionalities into one platform, providing a reconfigurable radio operation. Through physical experiments, we characterize the delay, current consumption and overall operational range performance of this approach under different transmit power levels. We also present an actual single-hop WuR application scenario, as well as demonstrate the first true multi-hop capabilities of a WuR platform and simulate its performance in a multi-hop scenario. Finally, by thorough qualitative comparisons to the most relevant WuR proposals in the literature, we state that the proposed WuR system stands out as a strong candidate for any application requiring energy-efficient wireless sensor node communications.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.