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

Test Cases Concept Portable communication device for use within industrial, collaborative work environment Status Back end mostly finished, GUI in the works. Gumstix—problems with ALSA and GNU Classpath Test Cases: Boot Gumstix, connect on boot. Connect multiple Gumstix to the server. Send/receive audio from the base station to the Gumstix. Server acceps multiple users and can move them between groups. Server talks only to specific groups and/or users.

Performance Tests Latency (primary) Why: Ability to have a normal conversation. How: Stopwatch/Basic Usability. Test Latency vs. Traffic. Network Traffic Why: How many users can we support? How: Increase number of users speaking and connected Packet Loss Why: Don’t want clipped, unrecognizable speech. How: JSpeex handles packet loss. Seamlessness Why: Users should be able to move between nodes (mobility). How: Piggy backing on existing networks.

Testing Process Network Traffic Brute force – increase users until system fails. Automated – increase packets sent (not voice, just random info). Latency Ping from the Gumstix. Stopwatch/General Usability. Also increase users, see how latency is affected.

Difficulties Latency will be most difficult because it is affected by a variety of things (traffic, processing, packet transfer, etc). Pinging does not time from input at the microphone to output from the speakers (compression, processing, human reaction time). Difficult to find the source of certain errors (for instance, sound: Classpath, JamVM, ALSA, OSS, etc.) Gumstix have been relatively difficult to work with.

Question Time!