throughput query

Bluez-users Manjunath Prabhu 2 participants 2 messages Nov 23, 2004 Bluetooth drivers

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Manjunath Prabhu

author

2004-11-23 15:27 UTC #0 lore raw

hi marcel,
I am using anycom bt dongles. i set up a bt connection with pan/bnep. i use i-perf to measure the throughput ..and i get abt 620kbps. I then change to DH5 packet and measure the throughput.....and it is abt 300kbps. Is this because of asymmetric and symmetric channels respectively.
logically,use of DM packets gives a lower througput compared to DH packets.

How is that hcitool is able to set the packet type in a connection? Isn't there some sort of communication with the LM and baseband?? Similarly, can't i change the transmit power level???

thanks and regards,
manjunath

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Marcel Holtmann

maintainer

2004-11-23 15:41 UTC #1 lore raw

Hi Manjunath,

Quoted 6 lines

I am using anycom bt dongles. i set up a bt connection with pan/bnep. i use i-perf to measure the throughput ..and i get abt 620kbps. I then change to DH5 packet and measure the throughput.....and it is abt 300kbps. Is this because of asymmetric and symmetric channels respectively.
logically,use of DM packets gives a lower througput compared to DH packets.

how often must I say this? Don't change the packet types. Enable all of them and let the link manager select the best one.

Quoted 1 line

How is that hcitool is able to set the packet type in a connection?

See above.

Quoted 1 line

Isn't there some sort of communication with the LM and baseband??

What do you mean?

Quoted 1 line

Similarly, can't i change the transmit power level???

No, you can't change that.

Regards

Marcel