Re: [Discuss-gnuradio] pdu and stream tagging in 3.6.3

[Martin Braun (CEL)]

On Fri, Feb 08, 2013 at 07:14:48PM +0000, Nowlan, Sean wrote:
> I'm playing around with the new 
> gr_pdu_to_tagged_stream/gr_tagged_stream_to_pdu
> blocks. Is there something that can translate between the new tag format and
> the standard tx_sob (start of burst)/tx_eob (end of burst)/tx_time tags?

Hi Sean,

there's only one type of tags--I'm not sure what you're asking here.

> I guess it's possible to write a packet scheduler if you fix a timestamp in 
> the
> PMT metadata dictionary? I think this would involve writing a message source
> block that could attach PMT pairs containing tx_sob/PMT_T and tx_time/tuple
> (uint64_t secs, double frac_secs). A downstream block could read the 
> pdu_length
> tag and put a tx_eob/PMT_T stream tag at the appropriate place. Does this 
> sound
> like a reasonable approach?

That sounds exactly like something I discussed with Johnathan recently.
Not everything you've described is there in GNU Radio, but it sounds
reasonable.

MB
-- 
Karlsruhe Institute of Technology (KIT)
Communications Engineering Lab (CEL)

Dipl.-Ing. Martin Braun
Research Associate

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KIT -- University of the State of Baden-Württemberg and
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