With stream tags you can precisely control timing of TX and RX, which should allow you to do packet transmission.
Brief intro: http://gnuradio.org/redmine/projects/gnuradio/wiki/BlocksCodingGuide#Stream-Tags Also look at these examples (copied from http://www.ruby-forum.com/topic/3832986) : A description of tags here: http://gnuradio.org/cgit/gnuradio.git/tree/gr-uhd/include/gr_uhd_usrp_sink.h#n59 http://gnuradio.org/cgit/gnuradio.git/tree/gr-uhd/include/gr_uhd_usrp_source.h#n59 A tags demonstration: http://gnuradio.org/cgit/gnuradio.git/tree/gr-uhd/examples/tags_demo.cc Sean -----Original Message----- From: discuss-gnuradio-bounces+sean.nowlan=gtri.gatech....@gnu.org [mailto:discuss-gnuradio-bounces+sean.nowlan=gtri.gatech....@gnu.org] On Behalf Of Pan, Luyuan Sent: Thursday, March 22, 2012 5:09 AM To: discuss-gnuradio@gnu.org Subject: [Discuss-gnuradio] [discuss-gnuradio] The Gnu radio's stream mode Hello everybody, Many people say the Gnuradio operates in stream mode with the flowgraph, but I am not clear about the stream mode, for it is too abstract. Does anyone have a better way to understand it or interpret it in plain words? And one thesis says,'Gnu Radio is not designed to work in packet mode, rather the scheduler is designed to operate on continuous data stream', so if I want to get precise-time control of the data packet, what should I do? (What I recently do is to switch the TX/RX using one antenna, I just make two top_blocks and switch them, the problem is there is too much delay. If I want to send 5 seconds, I also need to wait to 1.5 sec to make sure it successfully sent all the data) Can I so lucky to reference someone's information or get a hand from you? Thanks very much ! _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
