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- Latency laptop-Bluetooth-GPRS?
- Werner R Schilling
February 23, 2008, 6:48 pm
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cellphone, phone connected to the laptop by Bluetooth. Most times that
service appears to be extremely slow. The official tariff for this
service states a maximum latency of 100ms for the national section and
an additional 200ms on the international section. Packet loss on the
national section should be less than 10%, on the international section
less than 5%. As one of the URL's to use they state google.com.
When I tried to measure the ping-times to google on my laptop I got to
much higher >average< latency values of about 580ms or more, and
sometimes a loss rate of 50% when the time-out is set to 500ms,
interval 1 sec, buffer size 32 bits. The signal strength on the
cellphone was shown as excellent. As tool to measure I use
Now my question is, if I commited some systematic error in the way I
-- Do I need to take in consideration additonal time for transmission
and processing of Bluetooth?
-- Which time-out setting should I use?
-- In which interval should I set the pinging: every second, or five,
-- Any other variables that I forgot?
I know that this is slightly OT. But I also know that there are many
excellent professionals reading here. So please excuse.
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