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<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title>Home</title>
<link rel="stylesheet" href="style1.css">
</head>
<body>
<div class="img1">
<div class="centered"><h1 class="headline">Distributed Embedded Computing</h1></div>
</div>
<nav>
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="UNIT 1.html">Unit 1</a>
<ul>
<li><a href="broadband.html">Broadband Transmission Facilities</a></li>
<li><a href="OSI.html">Open Interconnection Standards</a></li>
<li><a href="LAN.html">Local Area Network</a></li>
<li><a href="WAN.html">Wide Area Network</a></li>
<li><a href="netmgmt.html">Network management</a></li>
<li><a href="netsec.html">Network security</a></li>
<li><a href="Ccomp.html">Cluster computers</a></li>
</ul>
</li>
<li><a href="#">Unit 2</a></li>
<li><a href="#">Unit 3</a></li>
<li><a href="#">Unit 4</a></li>
</ul>
</nav>
<div class="Brief">
<h1>A short note on distributed embedded systems</h1>
<p>Based on how the embedded system is implemented there are two types</p>
<br>
<ol>
<li>Centralised Embedded systems</li>
<li>Distributed embedded Systems</li>
</ol>
<br>
<p>1.Centralised Embedded systems</p>
<p>
In this format the controller(computer or plc) reads some input and
sends Outputs to some actuators.
</p>
<br>
<p>
The system under control requires a specific response: the controller has to be
real time.</p>
<img src="central.png" alt="">
<p>
The architecture of this system must be centralized i.e. all sensors and actuators
must be connected through dedicated links.</p>
<br>
<p>2.Distributed embedded Systems</p>
<p>In some applications, cabling started to be a problem: too costly(buildings)
and too heavy(cars)
For such cases the concept of a decentralized solutions were proposed</p>
<br>
<img src="dis1.png" alt="">
<p>
In this kind of system, cabling is cheaper and musch simpler and moreover the additon
of new sensors and actuators is easier. But simply adding them is also not possible
so it was necessary to provide some extra hardware and several controllers, each one
performing part of the controlling tasks</p>
<img src="dis2.png" alt="">
<p>The result is the Distributed control system.</p>
<p>They are widespread in nummerous applications:factories, buildings, vehicles, etc.</p>
</div>
</body>
</html>