5.3.1 The fidelity of Measuring
The fidelity of measuring depend on synchronization of time between sides of measuring
[12]. The CRUDE/RUDE can use synchronization of time from:
• Autonmous celsium clock on all sides (very expensive)
• GPS receiver (available)
• LAN (simpler but less fidelity)
We will use the simplest and cheap solution of LAN synchronization via The Network Time
Protocol.
5.4 Solution of QoS test
In QoS test i used a network equipment available in Lab of Signal processing on faculty of
electrical engineering in Zagreb. In Test i used:
• WiFi 802.11b D-link 900+ Access point
• WiFi 802.11b D-link 122 USB network adapter
• Swich HP Procurve 2626 1G/100 with supported Qos,CoS
• Two PCs with linux OS system
• UTP Cat-5 patch cables
On the figure 5 you can see the order of lab network for test QoS parameters needy for time
depend services.
Fig. 5 - Elementary laboratory (bridged) network for test QoS parameters
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