1. A Secure Wireless Interface between Personal Digital Assistants (PDAs)
Client
Dec02-07 Team Members Faculty Advisors
Michael Hale (CprE) David Inman (CprE) Dr. James Davis
Hassan Rashid (CprE) Jeremy Kohlhaas (EE) Dr. Douglas Jacobson
Abstract
The objective of this project is to develop a wireless interface between two personal digital assistants (PDA) using Motorola Talkabout handheld radios. Furthermore, all information being transmitted should be secure from interception.
Functional Requirements
The PDAs will connect to the Talkabout radios via a serial port and/or other connection methods.
Design Constraints
All components used must be lightweight.
Milestones
Design, Hardware production, Software implementation, Security, Testing, Demonstration, Documentation.
Introduction
General Background
The goal of the project is to develop a wireless interface between two Palm or HandSpring PDA devices using two Motorola Talkabout radios.
This task involves three major components: the Talkabout radios, the PDAs, and the hardware connection between them.
End-Product Description
This project will enable simple long-distance communication between two PDAs, using encryption for security.
The product will include special hardware to connect the PDA to a Talkabout radio, as well as software that manages this connection.
Technical Problem
Maximization of the data rate.
Security of the transmitted data.
Minimization of hardware cost.
Operating Environment
The components must be able to survive exposure to outdoor elements.
Range of date transmission will be limited to that of the Talkabout radios.
Technical Approach
Hardware design
Digital serial interface to PDA and analog interface to Talkabout radio
Modulation circuitry
Software design
User interface and Palm OS integration
Virtual connection management
Intended Users and Uses
The end product will be used by consumers who are in need of quick data transmission between portable devices.
Testing Approach
Unit testing will be used while the hardware and software are being independently designed.
System testing will occur after multiple hardware copies have been produced and the project is being finalized.
Assumptions
Only two Talkabout radios will be involved in a communication session at any given time.
Motorola will fabricate the hardware necessary for connecting each PDA/Talkabout pair.
Budget and Personnel Effort
Total cost for the project is estimated to be $2175.
Total time for the project is estimated to be 390 hours.
Limitations
The Talkabout radios have a limited range of operation. At the present time, the specific model, and thus range, that will be provided by Motorola is unknown.
Design Requirements
Design Objectives
The use of encryption will create a secure connection between the PDAs.
A modem type device will also be made to create an interface between the PDAs and the Talkabout radios.