From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: To: bluez-users@lists.sourceforge.net Subject: Re: [Bluez-users] Multiple Bluetooth connections In-Reply-To: Message from Marcel Holtmann of "Wed, 16 Mar 2005 10:42:10 +0100." <1110966130.9818.95.camel@pegasus> References: <42372E0A.80002@futurlink.com> <1110966130.9818.95.camel@pegasus> Message-ID: <22721.1110969653@csr.com> From: Peter Stephenson Sender: bluez-users-admin@lists.sourceforge.net Errors-To: bluez-users-admin@lists.sourceforge.net Reply-To: bluez-users@lists.sourceforge.net List-Unsubscribe: , List-Id: BlueZ users List-Post: List-Help: List-Subscribe: , List-Archive: Date: Wed, 16 Mar 2005 10:40:53 +0000 Marcel Holtmann wrote: > this is a hardware limit and I don't know of any chip that is capable of > establishing two connections at the same time. From what I know this > will never be possible, but you should better ask a radio/baseband > expert for a correct answer. Below HCI, it won't work in a typical set up. The usual scan mode is "R1 page scan repetition mode" where the device scans at least (and usually only) every 1.28 seconds, usually for 18 slots. If you try to page two devices at once, you run the risk of switching to paging the other device at exactly the short window you need to pick up one device, and hence miss it altogether. You can do it when the devices are in "R0" (continuous scan) but then connection time should be more or less instantaneous anyway and there's no gain. So it's not supported by HCI_Create_Connection. Once you have an ACL connection, it should be entirely possible to negotiate multiple channels over the top of it, depending on the software. pws ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. ********************************************************************** ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ Bluez-users mailing list Bluez-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users