How to send burst signal with GSM using HackRF one

Good day everyone!

I want to send burst signal with GSM using HackRF one.
I’m currently using GNU radio and gr-gsm, but I don’t know how to create a GSM burst waveform.
I am a beginner. If there is a sample that transmits a burst waveform of GSM, I would like to use it as a basis.
Is there any good sample?

thanks!

This is probably a good question for either the GNU Radio of HackRF mailing list.