Low delay medium access control protocol for wireless sensor networks
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Date
2009-06
Authors
Quan, Xiangyu
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Abstract
Wireless Sensor Networks (WSNs) are emergmg technologies with a variety of
potential applications, such as environment monitoring, earthquake redetection, patient
monitoring systems, etc. WSNs integrate Sensor Technology, Embedded Computation
Technology, Distributed Computation Algorithms and Wireless Communication
Technology into a specific problem domain. However, many problems still exist for
wireless sensor nodes. For example, when the number of sensors increases, the time
synchronization, routing, and other data transmission becomes increasingly complicated,
so the network delay increases as well. These issues affect the overall performance of
WSNs. In this dissertation, a new Medium Access Control (MAC) protocol that reduces
the delay in WSNs is proposed. This is a new and effective MAC protocol .This new
MAC protocol improves Time out MAC (TMAC). It combines features found in Sensor
MAC (SMAC) and Data Gathering Tree MAC (DMAC) to realize low delay WSNs,
called the Sensor Low Delay MAC (SLDMAC) protocol. SLDMAC is able to reduce
the length of time required for information convergence in WSNs. SMAC and TMAC
was compared with SLDMAC using simulation to show the performance gains of
SLDMAC, and was found that it not only reduces the network delay for the case of 10%
and 20% duty cycle compared to SMAC and TMAC, but also enhance the throughput
achieving 186 bytes/s and reducing energy consumption for the case of low data
generation rates.
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Keywords
Wireless Sensor Networks (WSNs) are emergmg technologies , integrate Sensor Technology into a specific problem domain.