Next century challenges: scalable coordination in sensor networks
MobiCom '99 Proceedings of the 5th annual ACM/IEEE international conference on Mobile computing and networking
Wireless Communications: Principles and Practice
Wireless Communications: Principles and Practice
Wireless sensor networks for habitat monitoring
WSNA '02 Proceedings of the 1st ACM international workshop on Wireless sensor networks and applications
Computer Networks
Control systems: smart buildings
IEEE Spectrum
Understanding packet delivery performance in dense wireless sensor networks
Proceedings of the 1st international conference on Embedded networked sensor systems
Taming the underlying challenges of reliable multihop routing in sensor networks
Proceedings of the 1st international conference on Embedded networked sensor systems
Impact of radio irregularity on wireless sensor networks
Proceedings of the 2nd international conference on Mobile systems, applications, and services
Medium access control with coordinated adaptive sleeping for wireless sensor networks
IEEE/ACM Transactions on Networking (TON)
Statistical model of lossy links in wireless sensor networks
IPSN '05 Proceedings of the 4th international symposium on Information processing in sensor networks
ATPC: adaptive transmission power control for wireless sensor networks
Proceedings of the 4th international conference on Embedded networked sensor systems
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Wireless sensor network (WSN) is increasingly being used in a wide range of environmental application. Such applications are habitat monitoring, large-scale industrial monitoring and urban population monitoring. WSN consists of tiny wireless devices typically cooperate with each other to aggregate sensor data to the base station. Providing a reliable data transmission and efficiency in energy usage is critical in order to prolong the network lifetime. We propose an enhanced lightweight medium access control (eL-MAC) protocol which combines scheduled based MAC mechanism and adaptive transmission power control. eL-MAC solves the problems that normally happen in WSN such as idle listening, over hearing and hidden terminal problem, by introducing a slotting communication mechanism where node only transmits in its own timeslot and sleep in other time slot if there is no activity. Furthermore, eL-MAC combines this protocol with an adaptive transmission power control where node uses an optimum transmission power level without reducing packet delivery ratio. We compare our protocol with traditional carrier sense multiple access (CSMA) mechanism and the result shows our protocol gives a more reliable packet transmission and prolongs the network lifetime.