1. A simple sensor network simulation using Tiny OS By Jonghoon Kim & Rajesh Sankaran EE & CSC, Louisiana State University, June 21 st, 2007

2. Tiny OS: What is TinyOS? What is TinyOS? T inyOS is an event based operating environment designed for use with embedded networked sensors. More specifically, it is designed to support the concurrency intensive operations required by networked sensors with minimal hardware requirements. How hard is TinyOS to learn? The concurrency concept requires some effort to get used to but it's essentially C. Proficiency and/or experience with GNU development tools is a plus, but not mandatory. From: http://www.tinyos.net/faq.html#SEC-16

3. Tiny OS and TinyViz on Windows. Simple, Easy, Stable and It Works ! Go to, http://tinyos.net/windows-1_1_0.html from there go to, http://webs.cs.berkeley.edu/users/users.php?download=1 Now, fill out the form and download and install. Please Install the above with Admin Privileges only. Else the Install will finally abort leaving a cruft behind.

4. Now the Simulation: Simulates a bunch of motes that cluster together and modify a bunch of files in a distributed way. Implemented : ◦ Clustering and Leader Election ◦ Time Synchronization. ◦ Distributed File servers ◦ File Distribution, Mutual Exclusion Energy Penalty for sending receiving and staying idle. – to be close to real world. Network Time Server and percolation of time into the network. Some Features Implemented:

5. Every node gets a energy penalty of 10 units for send, 5 Units for receive and 1 unit for Idle. Every Node starts as a newbie and makes 10 attempts to reach a cluster head. Any Cluster cannot have less that 2 client Nodes and a node cannot join a cluster whose rank is greater or less that itself by 5. When a file request which is very old its dropped . ( about 10 counts ). Simple rollback. Rules of the game:

6. How it all looks :

7. Lets see the Demo ….