Latency and Energy Efficient MAC (LEEMAC) Protocol for Event Critical Applications in WSNs
Motivation
Wireless sensor networks are appealing to researchers due to their wide range of application potential in areas such as target detection and tracking, environmental monitoring, industrial process monitoring, and tactical systems. However, lower sensing ranges result in dense networks, which bring the necessity to achieve an efficient medium access protocol subject to power constraints. Various MAC protocols with different objectives were proposed for wireless sensor networks. So this work focused mainly on latency issue for event critical applications.
Current Progress
We propose LEEMAC, a Latency and Energy Efficient MAC Protocol which is an improvement of DMAC protocol in a sense that it gives us better latency and a slight improvement in energy efficiency than by DMAC which was designed and optimized for data gathering trees where data is collected from all the source nodes to the sink node. Since the sensor node that starts transmission after detecting an activity and processing the data knows exactly how much to transmit information. So we can have a length field only once in the MAC header of first packet of the burst in place of more data bit showing number of slots that should be renewed.
Using our single-slot renewal mechanism, there will be sleep delay of only 3µ initially to send length field to renew one single slot of size length of the source node's buffer. So after that there will be a continuous full single slot available without any sleep delay to accommodate all the data to transfer smoothly. The algorithm is simulated using MATLAB 7.0.
Researchers
Principal Investigator
Graduate Students
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