Installing Probe

These instruction comprise Qosium Probe installation to different operating systems.

1. System Requirements #

1.1. Operating System #

Most of the Windows and Linux based operating systems are supported. See platform-specific instructions for further information.

1.2. Equipment #

  • The measurement point platform
    • Computer / network device / embedded system, or similar
    • Two devices needed for an end-to-end measurement
  • Performance considerations
    • Storage space: < 10 MB
    • Minimum reasonable amount of available system memory: ~ 20 MB
      • Higher system memory is recommended for enabling measurements of higher packet rates
      • Low memory restricts the number of simultaneous measurement controllers per Probe.
    • The processing power of the computer sets the limit to the packet rate of what can be analyzed
  • Network interfaces, which are supported by the used packet capturing library

1.3. Additional Software #

  • A packet capturing library
    • Npcap, WinPcap, or Win10Pcap on Windows
    • libpcap on Linux and other systems

1.4. External GNSS Receiver #

With an external GNSS receiver, accurate time can be got in addition to location. This allows synchronization of the system clocks of the measurement points accurately, enabling high-accuracy delay measurements.

  • GNSS receiver device providing PPS output and supporting NMEA or TSIP-protocol. Tested with:
    • Garmin GPS18x LVC
    • Trimble Acutime
  • PPS (Pulse Per Second) to Serial interface converter
  • Serial port in the PC
    • PCI-based serial port adapters will most likely also work well enough
    • USB-based serial port adapters are not recommended: tests have shown them to cause a milli-second level error to the PPS pulse
The delay measurement is the only one affected by the clock synchronization. Regardless of the synchronization of the clocks, other QoS statistics can be safely measured.
Satellite clock synchronization is currently not supported in Windows, but if this is an interesting feature for you, contact Kaitotek, since this is in our road map.

Further Reading