TY  - JOUR
T1  - Hybrid ET-MAC Protocol Design for Energy Efficiency and
Low Latency-Cross Layer Approach
AU - Chelliah, Pandeeswaran AU - , Pappanatarajan 
JO  - Asian Journal of Information Technology
VL  - 15
IS  - 22
SP  - 4450
EP  - 4463
PY  - 2016
DA  - 2001/08/19
SN  - 1682-3915
DO  - ajit.2016.4450.4463
UR  - https://makhillpublications.co/view-article.php?doi=ajit.2016.4450.4463
KW  - Hybrid MAC protocol
KW  -emergency
KW  -threshold
KW  -advanced home automation
KW  -switching
KW  -CSMA
KW  -TDMA
KW  -time crucial and energy efficiency
AB  - Hybrid MAC protocol design in wireless sensor networks becomes vibrant research field for the past
several years. The ubiquitous plug and play characteristics of commercially available open source hardware
paved way for the development of smart wireless sensor network. Wireless sensor networks can be termed as
a new generation of distributed embedded systems that has a capability of meeting broad range of real-time
applications. Examples includehome automation, industrial automation, power plant monitoring, radiation
monitoring, fire monitoring, pipeline monitoring and control, border surveillance, medical care etc. Wireless
sensor networks that are deployed in time critical or mission-critical applications with highlydynamic
environments have to interact with the physical phenomenon under stringent timingconstraints and severe
resource limitations. The proposed hybrid ET-MAC (Emergency Threshold MAC) protocol targets advanced
home automation which require careful MAC protocol design for safety critical low latency, reliability and end
to end delay as a primary concernand secondary concern can be given for parameters like residual energy,
energy efficiency etc. Supportingreal-time QoS faces severe challenges due to the wireless nature, limited
resource, low node reliability, distributedarchitecture and dynamicnetwork topology.This paper presents the
design, implementation and performance evaluation of a hybrid ET-MAC protocol with prioritization of
nodeswhich adopts a TDMA approach to schedule collision-free slots during emergency periodand CSMA/CA
approach during normal operation conditions in time/mission critical applications to avoid collision andto have
low latency. The proposed MAC protocol is simulated in NS2 environment and from the results, it is observed
that proposed protocol performs better than conventional MAC protocols in terms of energy efficiency and
offering low latency.
ER  -