hi Keith, it is my understanding that the TA value of osmo-pcu is working as expected, as the timing offset is established durign TBF establishment. What osmo-pcu is missing is the PTCCH signalling to continuously adjust the timing advance as the timing offset evolves during an onging TBF.
So for a subscriber at a [relatively] fixed distance from the BTS (like the population centre you're describing), it *should* be working. Please note that Sylvain has just very recently designed an open source "timing advance generator" under sysmocom contract, ant using that device (based on the PLUTO-SDR) plus some coaxial wiring/attenuators, it should be rather easy to simulate both static as well as changing timing advance. The project is called 'osmo-rfds' (for RF Delay Simulator), see http://git.osmocom.org/osmo-rfds/ If OsmoPCU was just always operating at a static timing advance, I would agree that a VTY command would be a possible interim hack. But AFAIK, the PCU is not actually that limited ;) Please help to clarify, thanks. -- - Harald Welte <[email protected]> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)
