Hello Vadim,
I'm working on the TTCN3 tests for OsmoPCU. Harald told me, that there are a few tests existing tests (such as TC_ul_tbf), that had been developed with osmo-bts-virtual/virt_phy.
He also said that since there is trxcon/fake_trx nowadays, it would be better to use that instead, if it supports PDCH. From a quick "git grep", it looks like PDCH is supported in trxcon.
What do you think, should it work well enough to do the switch?
Thanks, Oliver