[Discuss-gnuradio] Synchronized packet transmission

[Sangho Oh]

Hello,

What I am trying to implement is a synchronized packet transmission from more than one USPRs.

I wonder if there is a way to control the transmission timing under a microsecond level.

If there is a way to control the transmission timing using external clock signal, then it will be really easy. Like making USRPs transmit packets triggered by the external clocks. This may request to change of code in the firmware. 

I have tired to use UHD code to give backoff delays for each USRP transmission, but this method is quite not precise and cannot find a way to use it for a synchronized transmission. 

Any comments will be valuable to me.

Thanks.