Verry Nice! High-Five! Yoojin Kwak Michael Preysman Ruben Quintero Russell Savage

Concept and Motivation Portable communication device for use within industrial, collaborative work environment Send audio (possibly picture) information to groups of people For use in nuclear facilities where radios are not used due to sensitive equipment

Basic architectural diagram

Detailed architectural diagram

State Machine Use Cases 1. Listen 3. Group Transition request_base press_talk 2. Listen and talk release_talkpress_talk 1. Receive Data 3. Transmit Data 2. Overlay signal 4. Manage Groups

List of Use Cases USER: Listen Send to group Send to base Station Request to join group Request to leave group Request to send-all Query group info BASE USER: Set up system Receive from users Establish groups Add user Remove user Query group info Tear down system

Major risks associated Major risks centered around network Network traffic How much bandwidth/users Latency Back and forth between base station Packet loss Impact on overlaying signals Interference Potential obstacles, etc. Seamlessness Packet transition between different nodes Hardware; software; usability

Risk Mitigation Fundamental Risks Must be able to seamlessly have a conversation Packet loss cannot be an issue Latency must be below.5 seconds Ancillary risks Nice to have >10 users No hardware issues