Re: [Bluez-users] slave - slave talk in a piconet

bsd user
2008-01-12T16:31:40Z

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I learned PAN Profile 1.0 from SIG. I am interested in the PANU service.
According to the profile, device has PANU service can establish a connection
with another device's PANU service DIRECTLY, no need message forwarding by
NAP or GN node! but this feature hasn't been mentioned in "HOWTO-PAN"...

I want to setup a real p2p ad-hoc network with 4 bluetooth enabled computers
without message forwarding from 3rd node when message need to be exchanged
between any two nodes, see below picture::

+------+ +------+
| PANU1|<--->| PANU2|
+------+ +------+
/|\ \ / /|\
| X |
\|/ / \ \|/
+------+ +------+
| PANU3|<-->| PANU4|
+------+ +------+

in above scenario,
PANU1 is master of PANU2, PANUS3 and PANU4
PANU2 is master of PANU4,
PANU4 is master of PANU3,
PANU3 is master of PANU2,

So, PANU3 need to work in 2 piconet. Is this scenario valid?

Thanks a lot!

On Jan 3, 2008 10:53 PM, Laurent BARBIER <lbarbier@kameleon-media.com>
wrote:

> When you wan't to make B talk to C all need to be forward from and to A.
> Something like brctl do the job quite sufficiently.
> Have a look there : http://bluez.sourceforge.net/contrib/HOWTO-PAN
> section "Ethernet Bridging"
>
> Laurent
>
> bsd user a écrit :
> > So, B or C has no knowledge about each other when they are slaves of
> > master A, right? Then, can I say if B want to talk with C, they need
> > higher level protocol support, such as telnet, ftp. And, all data
> > exchange will be forwarded by Master A. right?
> >
> > Thanks!
> >
> > On Jan 3, 2008 9:07 AM, guoyun <guoyun@techfaith.cn
> > <mailto:guoyun@techfaith.cn>> wrote:
> >
> > Hi, Brad
> >
> > > hey
> > >
> > > > If there is a piconet that has 2 slave B,C, the master is A.
> > Does B
> > > > know the existence of C? can B talk to C directly without
> > > A(master)'s intervention?
> > >
> > > if they did talk to each other directly, one would have to be
> > > master and you'd have a scatternet.
> >
> > one bluetooth could be in two or more piconet, but it just can
> > play as slave _not_ master for the bluetooth clock.
> >
> > Please refer to Core SPEC. chapter 4.1. Piconet topology.
> >
> > BRs
> > Yun
> >
> >
> >
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