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1. CONTENT DELIVERY IN AD-HOC WIRELESS NETWORK Dec 1003 Abstract Wireless connectivity has become popular in our everyday life and the ability to exchange information is increasing just as fast.  Examples of technologies implementing ad-hoc networks include Wi-Fi, Bluetooth and Zigbee. Our goal is to establish communication between USRPs, USRP to Sensor and Sensor to Sensor using Zigbee protocol (IEEE 802.15.4) . This protocol operates at 2.4GHz broadcasting frequency. We will be implementing a star network topology for our sensor networks. We also aim to print useful data obtained from the sensors Concept Sketch Hardware USRP USRP is Universal Software Radio Peripheral is a general purpose RF hardware device designed by Ettus Research which provides a low-cost, readily but versatile radio functionality. TelosBSensor TelosB sensor is developed by Crossbow Technology Inc., which can receive and relay information obtained by onboard light, temperature and humidity sensors. Testing To the right is the display of the oscilloscope application, which displays the readings from two TelosB motes. The data taken is from the light sensors on each TelosB mote. There are 10 samples taken per sample period. Software GNU Radio GNU Radio is an open source software toolkit for learning, building and implementing software defined radio systems. GNU radio supports the Zigbee protocol which is primarily used for the project. GNU radio has python and C++ blocks which will be used to  transmit and receive messages to and from the USRPs and the TelosB sensors.  Since it is open source it will help us forgo all licensing fees. TinyOS TinyOSis a free and open source operating system for the Wireless sensor networks (WSN). The applications installed on the motes are written in network embedded systems C (nesC) and utilize the component-based architecture of TinyOS to minimize memory usage on the motes. Time Division Resources Summary The main goal of our project was to establish communication between USRPs, TelosB sensors, and in between the USRPs and sensors using the Zigbeeprotocol (IEEE 802.15.4). The end state of  a continuing project being a wireless  mesh like sensor communication network tied together with USRPs. The GNU Radio and TinyOSsoftware were tools to assist us in establishing that communication. We were able toestablish communication from sensor to sensor and USRP to sensor. The main backbone communication between USRPs was not successfully implemented and could be the focus of a future senior design project. Team Members Wyatt Brenneman Taylor McKechnie Prashanth Yanamandra Advisor Dr. Lei Ying Ming Ouyang Client Iowa State UniversityECpE Department Website http://seniorddec1003.weebly.com/index.html