Wireless sensor networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
An adaptive energy-efficient MAC protocol for wireless sensor networks
Proceedings of the 1st international conference on Embedded networked sensor systems
Versatile low power media access for wireless sensor networks
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
WiseMAC: an ultra low power MAC protocol for the downlink of infrastructure wireless sensor networks
ISCC '04 Proceedings of the Ninth International Symposium on Computers and Communications 2004 Volume 2 (ISCC"04) - Volume 02
Mobile and Wireless Communications
Mobile and Wireless Communications
Analysis of the contention access period of IEEE 802.15.4 MAC
ACM Transactions on Sensor Networks (TOSN)
A Scalable and Low-Cost Grid Portal
GCC '08 Proceedings of the 2008 Seventh International Conference on Grid and Cooperative Computing
Spectral efficiency in the wideband regime
IEEE Transactions on Information Theory
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In WSNs, energy conservation is the primary goal, while throughput and delay are less important. This results in a tradeoff between performance (e.g., throughput, delay, jitter, and packet-loss-rate) and energy consumption. In this paper, to jointly optimize performance and energy consumption, firstly, we carry out a comprehensive analysis of bandwidth and power efficiency of IEEE 802.15.4 WSNs. Secondly, a power-efficient MAC protocol, PeMAC, and a bandwith-efficient MAC protocol, BeMAC, are presented in this paper. In PeMAC and BeMAC, based on power and bandwidth efficiency criterion respectively, each node independently adjusts its contention parameters (e.g., the minimum back-off period) to the estimated system state (e.g., the number of competing nodes). Simulation results show that PeMAC and BeMAC can increase the power and bandwidth efficiency respectively while still maintaining reasonable system performance.