Yes, I understand what multicast means :-)... And yes, this is what I'm trying to point out, the problem is that you can't multicast to so many nodes for a given device because the hardware *just won't* support it for *most* devices out there these days...
And furthermore, I'm saying that even if you overlay a multicast layer on top of the Bluetooth connection, you will still have pretty crappy connectivity, because I've only ever see people get it working with 2/3 nodes, with a hard limit of 7 (iirc) for a piconet... Though I just don't see utility in multicasting to that many people at once via BT, that's just *not* what the protocol's (medium's?) intended for... kris On Mon, May 21, 2012 at 1:49 PM, mike digioia <[email protected]> wrote: > Multicast does this for you automatically, however, Bluetooth currently does > not support multicast like IP. It is PTP. > > see this link: > > http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CF4QFjAB&url=http%3A%2F%2Fwireless.cs.tku.edu.tw%2F~cychang%2FTMCP.pdf&ei=Z366T63_MLGUmQXHj4GzCQ&usg=AFQjCNGw-2ARQ1I-FXu30Qtpxgwsh3Wb9w&sig2=vedcvR89NgXqjsJV9Fz1vQ > > > On Mon, May 21, 2012 at 10:23 AM, Kristopher Micinski > <[email protected]> wrote: >> >> That would be the same as any other message queue adapted to sit on >> top of a different socket layer, however, I believe... >> >> kris >> >> On Mon, May 21, 2012 at 1:11 PM, mike digioia <[email protected]> wrote: >> > Oh sorry I just stated what I believe is the current packet size >> > linitation >> > of BT as 950. >> > >> > Yes you are correct about the limitations on any one device today. >> > However, >> > the CCNX will handle the networking of devices as it does today over IP. >> > Nothing is being changed inside the CCND except to handle as additional >> > BT >> > socket type. >> > >> > >> > On Mon, May 21, 2012 at 9:56 AM, Kristopher Micinski >> > <[email protected]> wrote: >> >> >> >> Right, that's what I said... But I also said that I doubt that for a >> >> real live device, if any one can have more than two open connections >> >> at a time, I'd be surprised, please tell if so! And, if you're >> >> talking to 950 nodes where the average degree is two for each node... >> >> That's gonna be pretty harsh ;-) >> >> >> >> kris >> >> >> >> On Mon, May 21, 2012 at 12:53 PM, mike digioia <[email protected]> >> >> wrote: >> >> > You can do this with a multicast based Openfire system! This uses IP. >> >> > Bluetooth as the transport using sockets is still under study, since >> >> > I >> >> > am >> >> > just attempting to get the first case to work with only one chat >> >> > between >> >> > two >> >> > phones. Since this uses Content Centric networking, it can be >> >> > extended >> >> > to >> >> > handle many nodes by extending bluetooth headers and doing packet >> >> > fragmentation (BT max is 950) to handle large packets. >> >> > >> >> > On Sun, May 20, 2012 at 10:01 AM, Kristopher Micinski >> >> > <[email protected]> wrote: >> >> >> >> >> >> You basically, can't do it for Bluetooth, with more than two / three >> >> >> (max usually) nodes. >> >> >> >> >> >> You can look into wifi direct. >> >> >> >> >> >> You can also put a p2p overlay on top of a standard java socket. >> >> >> But >> >> >> that makes this no more interesting than any desktop java app. >> >> >> I.e., >> >> >> there is absolutely nothing that makes it Android specific. >> >> >> >> >> >> http://www.zeromq.org/build:android >> >> >> >> >> >> There's a 0MQ build on Android, but it's using the NDK, and I >> >> >> haven't >> >> >> seen Java bindings, so it's probably going to a real pain to use. >> >> >> (Though in real apps, a message queue like 0mq would be a real >> >> >> lifesaver, since you're basically going to emulate that anyway!) >> >> >> >> >> >> kris >> >> >> >> >> >> On Sun, May 20, 2012 at 12:41 PM, sudheesh ap >> >> >> <[email protected]> >> >> >> wrote: >> >> >> > Yes, it's for a class project. The aim is to make a p2p >> >> >> > overlay >> >> >> > network >> >> >> > in android platform to support p2p android applications such as >> >> >> > multiplayer >> >> >> > games.I was asking about the possibility to make it over the >> >> >> > bluetooth/wifi >> >> >> > connection. Waiting for your valuable suggestions. >> >> >> > >> >> >> > Regards, >> >> >> > sap >> >> >> > >> >> >> > -- >> >> >> > You received this message because you are subscribed to the Google >> >> >> > Groups "Android Developers" group. >> >> >> > To post to this group, send email to >> >> >> > [email protected] >> >> >> > To unsubscribe from this group, send email to >> >> >> > [email protected] >> >> >> > For more options, visit this group at >> >> >> > http://groups.google.com/group/android-developers?hl=en >> >> >> >> >> >> -- >> >> >> You received this message because you are subscribed to the Google >> >> >> Groups "Android Developers" group. >> >> >> To post to this group, send email to >> >> >> [email protected] >> >> >> To unsubscribe from this group, send email to >> >> >> [email protected] >> >> >> For more options, visit this group at >> >> >> http://groups.google.com/group/android-developers?hl=en >> >> > >> >> > >> >> > -- >> >> > You received this message because you are subscribed to the Google >> >> > Groups "Android Developers" group. >> >> > To post to this group, send email to >> >> > [email protected] >> >> > To unsubscribe from this group, send email to >> >> > [email protected] >> >> > For more options, visit this group at >> >> > http://groups.google.com/group/android-developers?hl=en >> >> >> >> -- >> >> You received this message because you are subscribed to the Google >> >> Groups "Android Developers" group. >> >> To post to this group, send email to >> >> [email protected] >> >> To unsubscribe from this group, send email to >> >> [email protected] >> >> For more options, visit this group at >> >> http://groups.google.com/group/android-developers?hl=en >> > >> > >> > -- >> > You received this message because you are subscribed to the Google >> > Groups "Android Developers" group. >> > To post to this group, send email to [email protected] >> > To unsubscribe from this group, send email to >> > [email protected] >> > For more options, visit this group at >> > http://groups.google.com/group/android-developers?hl=en >> >> -- >> You received this message because you are subscribed to the Google >> Groups "Android Developers" group. >> To post to this group, send email to [email protected] >> To unsubscribe from this group, send email to >> [email protected] >> For more options, visit this group at >> http://groups.google.com/group/android-developers?hl=en > > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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