Re: [Bluez-users] packet types / speed (USB dongles)?

[Marcel Holtmann <marcel@holtmann.org>]

Hi Lutz,

> > every CSR based that I have seen so far supports every packet type from
> > the Bluetooth 1.1 specification. However you can set the used packet
> > types by yourself, but this makes no sense. Simply enable them all and
> > let the link manager decide what's the best to use. The HVx packets for
> > SCO audio links and don't matter for the data transfers over ACL.
> Is it normal than that file transfer with obexftp to the phone is
> not faster than 1 MB per minute?

I never did any bandwith tests with OBEX, but actually the flow of
L2CAP<->RFCOMM<->OBEX gives you a big performance decrease of the 1 Mbit
bandwith of a piconet. But this must not be a problem of the dongle,
because both link managers must decide to use the correct packet type.
And of course the phone CPU must be fast enough to handle the RFCOMM and
OBEX protocol very well. There are more bottlenecks so this question is
not really easy to answer.

Regards

Marcel




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