Title :
A Novel Cooperation Scheme for Wireless Sensor Networks
Author :
Bai, Lu ; Zhao, Lian ; Liao, Zaiyi
Author_Institution :
Ryerson Univ., Toronto
fDate :
March 31 2008-April 3 2008
Abstract :
Diversity is an effective way to combat the impacts of channel fading by obtaining diversity gains and therefore, is attractive in the design of wireless sensor networks (WSNs) where energy efficiency is important. In this paper, we consider a cluster-based WSN in which the base station (BS) is located far from the sensor nodes and cluster heads cooperatively transmit information to the BS using decode and forward approach in a code-division multiple-access (CDMA) system. The cluster heads serve as both information sources and relays at the same time. The energy efficiency improved by the proposed approach is presented in this paper. How the system parameters such as bit rate, quality of service (QoS) and distance from the BS influence the scheme selection is given in this paper as well. Simulation results show that the proposed scheme saves energy significantly when BS is far from WSN and the QoS requirement is stringent.
Keywords :
code division multiple access; fading channels; quality of service; relays; wireless sensor networks; base station; channel fading; cluster-based WSN; code-division multiple-access system; cooperation scheme; decode-and-forward approach; energy efficiency; information relay; information source; quality of service; wireless sensor network; Base stations; Decoding; Diversity methods; Energy efficiency; Fading; Multiaccess communication; Quality of service; Relays; Sensor systems; Wireless sensor networks;
Conference_Titel :
Wireless Communications and Networking Conference, 2008. WCNC 2008. IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1997-5
DOI :
10.1109/WCNC.2008.336