Thanks for the reply George. I'm still looking for a little more information on this topic.
- What is PMT - Why was m-block removed - Has anyone measured latency with the USRP2 and GigE - Is GigE alone not capable of handling MAC turnaround times or is software to blame for this - Is the scheduler the main issue in the way it handles i/o between blocks Charles On Sun, Mar 14, 2010 at 5:52 PM, George Nychis <gnyc...@gmail.com> wrote: > Think of it this way... > > MAC *development* is severely limited by GNU Radio... it lacks the > much-needed functionality to make information passing between the > blocks rich, simple, and bi-directional. Some of the building blocks > are in place (e.g., PMT), and the m-block was implemented to solve the > rest of the problems, but was deprecated (maybe removed as of now?). > > MAC *performance* is limited by several things: 1) delay between GNU > Radio and the USRP/USRP2, 2) signal processing delay (GNU Radio), and > (3) jitter (e.g., unpredictable delay) ... (1) is reduced a little by > USRP2 using GigE, but it's still not down to traditional MAC > turnaround times (10s of us). (2) benefits from Moore's law. (3) > kind of depends on whether you use realtime scheduling and how your > data hits delays in queues mainly. > > All in all... still an open problem IMO. > > - George > > > On Sun, Mar 14, 2010 at 5:06 PM, Charles Irick <cir...@gmail.com> wrote: >> I've been reading some papers related to MAC layer development on the >> USRP, but they seem to have tapered off with the USRP2. Does anyone >> have any information about MAC layer and protocol development for the >> USRP2. Has this been satisfied with things like timestamps and gigE? >> Any current papers or web links related to USRP2 protocol level >> development? Thanks. >> >> Charles >> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio