Subject: Re: [Bluez-devel] Setting up two connections at the same time
From: Marcel Holtmann <marcel@holtmann.org>
To: bluez-devel@lists.sourceforge.net
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Date: Tue, 13 Dec 2005 13:42:23 +0100

Hi Herman,

> >>thanks for your reply. It is not only a problem if one single 
> >>application tries to set-up multiple connections simultaneously, it will 
> >>also fail if two independent applications on one machine try to setup a 
> >>connection. This makes bluetooth an unreliable medium from an end-user 
> >>perspective because connection set-up may fail randomly because of this. 
> >>This will off course not happen extremely often. However I think that 
> >>this problem could be solved at HCI level which can keep track of the 
> >>controller state. E.g. it could hold up any Connection Request until the 
> >>previous one has finished. Or am I missing something?
> >
> >feel free to propose something to support this. However this must be
> >done at kernel level in the Bluetooth core HCI functions.
>
> I was afraid you were going to say this :-) I completely agree with you 
> and I hope my boss will give me the time to think about this and let me 
> make a prototype. In the meantime I will probably try to workaround this 
> with multiple dongles.

and btw you will see similar problems with inquiry and remote name
requests at the same time. You might need to serialize all of them.

An interesting question is how any of Windows stacks handles this? Are
they capable of dealing with it or do they act like Linux?

Regards

Marcel


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