Table of Contents
Wireless LAN Performance Measuring Time in Real systems
When do we measure time?
Example Experiment
Transmission Model
Sequence of Queues
Independent Clocks
Synchronizing Clocks - NTP
Variable Delays
Correcting Offset and Drift
Results from a Preliminary Experiment
Java Timing Services
Underlying Systems
Alternative Clocks
Problems with Processor Clock
Tracking Clock Changes
Requirements for Clock Package
Structure of Clock Implementation
Tracking Errors – Real Time Version
Twin-clock Post-hoc Merge
Finding Lower Delay Bounds
Finding Lower Delay Bounds (2)
System Clock Changes
Inter-System Clock Correction
Results with Corrected Clocks
Network Configuration
Checking Measurements on Routes
Wireless LAN – Changing Speeds
Poorer Signal Conditions
Different Wireless Modes
Inter-Packet Measurements
More Interpacket
Future Directions
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Author: p.f.linington
Email: pfl@ukc.ac.uk
Home Page: http://www.cs.ukc.ac.uk/people/staff/pfl/index.local
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