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Title Performance Analysis of Contention-Based Medium Access Control Protocols with Frame Architecture in Wireless Sensor Networks
Degree Ph.D.
Author Seokjin Sung
Advisor Kiseon Kim
Graduation Date 2009.02.24 File
    Date 2013-09-11 17:29
During recent years, the development of energy-e±cient medium access control
(MAC) protocols for wireless sensor networks (WSNs) has received increasing inter-
ests. An appropriately designed protocol on the MAC sublayer, wholly managing the
access of distributed sensor nodes to a real physical medium, can guarantee high energy
e±ciency, a key requirement in WSNs. In particular, contention-based MAC protocols,
using the competition of sensor nodes to access a shared channel through probabilis-
tic coordination, have attracted high attention as good candidates for WSNs, since
they are °exible to topology changes and do not require strict time synchronization.
However, sensor nodes adopting the contention-based MAC protocols are confronted
with overhearing and collision problems inevitably, consequently causing energy waste.
Accordingly, to overcome this drawback of high energy consumption, it is known that
a novel idea of periodically turning o? the radios of all sensor nodes can be used. For
the application of the periodic sleep idea, using a frame architecture is highly e?ec-
tive, because it makes the sensor nodes operate with the same sleep schedule, so that
the nodes can easily communicate with each other. Thus, in the area of contention-
based MAC protocols with the frame architecture, a great variety of sleep-coordinated
schemes have been proposed, and the sensor-MAC (S-MAC) protocol is well known as
a classic adopting the frame architecture. Performances such as energy consumption,
delay, and throughput of the S-MAC protocol have been widely evaluated through ex-
perimental or simulated results to show its suitability for WSNs.
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