Hi.
After updating uhd to UHD_003.010.000.000-release I got it partially working. It's summarized in https://projects.osmocom.org/issues/1648
If I understood correctly there are 2 possibilities for multi-trx setup with osmo-trx: multiplexed and non-multiplexed. The command to run osmo-bts-trx is the same in both cases: you've got to specify number of trx like in "./src/osmo-bts-trx/osmo-bts-trx -c ~/.config/osmocom/osmo-bts-mtrx.cfg -t 2". From osmo-trx, the difference is:
non-multiplexed: ./Transceiver52M/osmo-trx -c 2 -l INFO
multiplexed: ./Transceiver52M/osmo-trx -m -c 2 -l INFO
The question is - is there any difference between multiplexed and non-multiplexed mode for osmo-bts-trx config file? I've got multiplexed mode working with following setup:
...
phy 0 instance 0 instance 1 ...
trx 0 phy 0 instance 0 trx 1 phy 0 instance 1 ...
Should it look differently for non-multiplexed mode? Are there some other command-line options or config files adjustments missing to make non-multiplexed mode working? Did I got the overall setup right?
On 08/12/2016 09:05 PM, Tom Tsou wrote:
On Thu, Aug 11, 2016 at 2:50 AM, Max msuraev@sysmocom.de wrote:
On 08/10/2016 07:35 PM, Tom Tsou wrote:
The 'multi-carrier' approach multiplexes up to 3 ARFCN channels onto a single physical RF channel (side A) on the B210. Channel spacing is fixed at 800 kHz, or 4 ARFCN channels. ARFCN settings from OpenBSC must match accordingly. The '-m' option enables this configuration.
Could you give an example of necessary openbsc and osmo-bts configuration for both cases?
Config files and README are attached. Note that the osmo-trx multi-carrier '-m' option requires UHD master. I'm still backporting the needed settings.
Also note that the above configurations cannot be combined.
So I should not run "./Transceiver52M/osmo-trx -c 2 -g -m"? Only "./Transceiver52M/osmo-trx -c 2 -g" or "./Transceiver52M/osmo-trx -g -m"? Or you referring to the incompatibility of configuration of openbsc? Or Osmobts?
You cannot support, for example, 6 ARFCN operation on B210 using 3 TRX on side A and another 3 TRX on side B.
Whether you use '-c 2 -m' or just '-c 2' depends on whether you want to feed two ARFCN channels through 1 or 2 PA's respectively.
-TT