Minimizing latency in wireless sensor networks: a survey
ACST'07 Proceedings of the third conference on IASTED International Conference: Advances in Computer Science and Technology
Extending network lifetime for ALLIANCES
Computer Communications
Wake-up receivers for wireless sensor networks: benefits and challenges
IEEE Wireless Communications
Computer Networks: The International Journal of Computer and Telecommunications Networking
Minimum energy and latency MAC protocol for wireless sensor networks
UIC'07 Proceedings of the 4th international conference on Ubiquitous Intelligence and Computing
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In wireless sensor networks, efficient usage of energy helps in improving the network lifetime. As the battery of a sensor node, in most cases, cannot be recharged or replaced after the deployment of the sensors, energy management becomes a critical issue in such networks. In order to detect an event, a sensor network spends majority of the time in monitoring its environment, during which a significant amount of energy can be saved by placing the radio in the low-power sleep mode. This can be achieved by using a dual frequency radio setup. However, such energy saving protocols increase the latency encountered in setting up a multi-hop path. We, in this paper, propose a reservation scheme, Latency minimized Energy Efficient MAC protocol (LEEM), which is a novel hop-ahead reservation scheme in a dual frequency radio to minimize the latency in the multi-hop path data transmission by reserving the next hopýs channel a priori. Thus, in a multi-hop sensor network, a packet can be forwarded to the next hop, as soon as it is received by a sensor node, which helps in eliminating the delay incurred for setting up the path. Simulation results show that LEEM consumes lesser power and reduces end-to-end latency by around 50% than that of the existing schemes.