Previously, the pre-cog introduced a simple implementation of TDMA: http://gnuradio.4.n7.nabble.com/Introduction-to-Pre-Cog-td37906.html
I read roughly the code in the tdma_engine.py. For the transmitter, it seems that this tdma_engine works like a throttle to send the messages to the downstreams only when the time_update is later than the time_transmit_start. And these time are computed based on the tags in the incoming items inserted by upstream block. My question is that, where does the upstream block get the correct time? I know that the usrp_sink can get_time_now but it is on the very downstream, and it is different block which means different thread. If my question is not clear, please give your comments. Thanks. -- Alex, *Dreams can come true – just believe.*
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