CSys Contribution

1
CSys Contribution

• So far Design and initial development of a
  wireless network emulation platform (running
  realtime)
• What is next? Usage of te emulator in order to
  access the performance of packet services (
  implementation refinments of the emulator)
• Scenarios
• First implementation is dedicated for UMTS
  performance emulation
• Later Hetrogenous mixture of cellular networks
  and WLAN can probably be emulated

2
Hardware platform

• Two servers One application server and one proxy
  server (hardware already available for CSys Lab)
• Proxy server will be used for proxying of FTP and
  HTTP traffic. It also runs the wireless networks
  emulator
• The User (client) connect to the internet
  (application server) through the proxy in order
  to emulate te performance of e.g. UMTS
• Application server runs services such as
  streaming and users (clents) can access it via
  the proxy server

3
Usage
Application Server (eg. Streaming)
Buffer
Delay/ Erase
Configuration files
Log files
4
Potential Refinments

• Make the emulator accomodate several users, each
  one specifying his/her needed celluar network
  parameters
• Provide extensive logging information for
  analysis of results, not only end-2-end transport
  layer information but also information concerning
  lower layers.
• Make the emulator run continously in real time
• Other enhancements?

5
Potential colaboration

• Performance analysis of packet services (eg.
  VoIP, Gaming, File downloading) over a UMTS
  network that is showing dynamic behaviour (such
  as bandwidth fluctations, discontinuties and
  variable delays...)