Re: [Discuss-gnuradio] V3 Comments on "BBN's Proposed extensions for data networking"

[Michael Dickens]

On Jun 15, 2006, at 2:03 AM, Eric Blossom wrote:
> On Thu, Jun 15, 2006 at 12:51:05AM -0400, David Lapsley wrote:
> > On 6/14/06 2:24 PM, "Michael Dickens" <address@hidden> wrote:
>
> > > p68, 4.8.1; and p74, 4.8.4: How can an m-block have zero ports?  I
> > > thought that all data / metadata / signals / whatever were
> > > transported via these ports.  Without a port of any type, what  
> > > can an
> > > m-block do?
> >
> > Not much!  This is a bug.  I'll fix it.
>
> Actually an m-block could have zero external ports with no problem.
> In fact that's exactly what the top level m-block looks like ;)

OK, I'll bite.  How does data get into or out of something with zero  
external ports?  Via internal ports?  So, e.g., a source could be  
made internal-only, and connect internally to other m-blocks, and  
eventually drop to an internal-only sink?  Are there any advantages  
to setting up this way versus using a single m-block per signal- 
processing concept (source, processing, sink)?  IMHO it would be  
helpful to have a quick example in the text, just to be (more)  
complete. - MLD