AN APPROACH TO IMPROVE PERFORMANCE OF MAC IN WSN BY REDUCING LATENCY

Abstract

The WSN is built of "nodes" – from a few to several hundreds or even thousands, where each node is connected
to one (or sometimes several) sensors. Each such sensor network node has typically several parts: a radio transceiver with
an internal antenna or connection to an external antenna, a microcontroller, an electronic circuit for interfacing with the
sensors and an energy source, usually a battery or an embedded form of energy harvesting. MAC layer is concern with the
sharing physical connection to the network among several computers. It is responsible for moving data packets to and
from one Network Interface Card (NIC) to another across shared channel. The main purpose of MAC is to provide
addressing, framing, and perhaps error detection for the type of the media that will be used. MAC protocols are used in
MAC sub layer. There are two different types of MAC protocols: the fixed assignment channel access methods which
assign nodes onto different time slots to avoid collision (TDMA), and the contention-based channel access methods in
which nodes compete for the wireless communication channel, an example such as carrier sense multiple access (CSMA)
but in our work we use energy parameters before sent data based on the energy value, data rate and location information
each node participate in communication. Using this approach we can improve energy consumption delay and throughput
of network.