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 Post Posted: Mon Jan 26, 2015 5:46 pm 
 

Joined: Thu Jan 01, 2015 1:07 pm
Posts: 30
Hi
I read your articles on network delays, processing delays etc

Is there a way in the latest code to calculate these times?
I specifically want to know the network latency - which is the time to deliver the packet from client to server and vice versa.

Plus , the QoS reports show RTT, but I am not sure about the units. Are these seconds or milliseconds?


Thanks


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 Post Posted: Tue Jan 27, 2015 2:33 pm 
 

Joined: Tue Jun 04, 2013 2:07 pm
Posts: 301
Hi,

You need to add codes to measure delays. Also you may read our another paper for a external measurement method: On the Quality of Service of Cloud Gaming Systems.

For the numbers reports from RTCP, the RTT is in a unit of 1/65536 seconds. I have modified the codes to show RTT in milliseconds.

The jitter is basically a variance, and the sampling frequency (time unit) depends on the implementation and the codecs. I have also modified the codes to print out its current sampling frequency. In my case, it's 90000Hz, but it may be different in your case. So if you plan to see it as a time unit, a reported jitter of 10000 could be transformed to sqrt(10000)/90000 ~ 1.1ms

Chun-Ying


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 Post Posted: Tue Jan 27, 2015 6:44 pm 
 

Joined: Thu Jan 01, 2015 1:07 pm
Posts: 30
Wonderful!
Really helpful! Thanks for the modified codes too.


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