Discussion & Conclusions

    *among commands of the same type there are not large differences

    *results from remote site comparable to local results

    *average delay due to Internet is 88 milliseconds for local tests and 231 ms for remote tests

    *average delay due to combination of Internet and connectin to the robot's computer is 243 ms
      for local tests and 366 ms for remote tests

From these results it can be said that the latency across the network does not degrade the overall performance of the system since the latency is always on the order of  10ths of a second.

The video images and robot position update rate have the greatest importance on the overall system performance. The video images are updated every second and considering transmission time there are visualisation delays up to a maximum of 2 seconds.

The robot's position on the client interface is updated every 700 milliseconds using data memorized in the host server. The host server data is updated every 1100 ms which can lead to a delay of up to 2 seconds. The 1100 ms buffer update limit is due to the limited serial transmission bandwidth between the host server and the robot server (9600 baud).