site_archiver@lists.apple.com Delivered-To: Bluetooth-dev@lists.apple.com Hi Laurent. Matthias (PhD Student..:) On 10.07.2008, at 15:27, Laurent Kirsch wrote: Hello, Any ideas are welcome. Thanks Kirsch Laurent (student) _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists.a... The funny part about Bluetooth Scatternets is that they are hardly specified and even more, that there are no HCI commands which would tell the BT module a Scatternet. So you're at the merci of the Bluetooth vendor. Most BT modules nowadays support Scatternets out-of-the-box. All you have to do is open connections in the right order. Example: Device A opens a connection to B. With default settings, A is now the master of the Piconet. Now, device C comes along and tries to open a connection to B. If the Bluetooth moduel of B supports Scatternets / mutplie Piconets, B gets to be slave of C, too. That's for the baseband connectivity. For the data forwarding, e.g. from slave 1 to slave 2, you have to come up with something. If you do IP communication, this might work outmatically. Check out our papers on Bluetooth Scatternets for our BTnode embedded systems at btnode.ethz.ch I would like to know whether the Apple Bluetooth modules/stacks support the creation of scatternets,i.e. Is it possible that one device can be in more than one piconet simultaneously and serve as a router to route packages from one piconet to another one ? Basically what I want to do is write a group communication service. However because it is impossible to connect to more than 7 devices simultaneously it would be good if it was possible that one of the 7 devices of this first piconet could form another piconet and then play the role of a router to get the packages from one piconet to the other one. In this way it would be possible to have a bluetooth network with more then 7 devices without having to park some of them. If it is not well explained please tell me, I will try to explain it in a better way. This email sent to site_archiver@lists.apple.com