UmTRX April 2015

umtrx@lists.osmocom.org

4 participants
3 discussions

Query - Running two ARFCN on UmTRX using OsmoBTS
by Amber and Sarosh 18 Jun '15

18 Jun '15

Hi All, We want to run two independent ARFCNs on UmTRX using the two TRXs on the device using osmo-bts, but just as trx 0 is defined in osmobts.cfg we cannot define trx 1. Can someone please help us accomplish this? Also please inform if it is possible that we run one TRX on GSM900 and another on 1800? Note: we have compiled the openbsc setup as per instructions at http://openbsc.osmocom.org/trac/wiki/network_from_scratch using the jolly/multi-trx branch. Regards, Amber & Sarosh

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UmTRX uhd_usrp_probe command "holler protocol" error
by Kea Barnes 19 May '15

19 May '15

Hi, I have been following the instructions at (http://www.rs-online.com/designspark/electronics/eng/blog/running-a-gsm-net work-on-the-raspberry-pi-2) but have encountered a strange error when I run the "uhd_usrp_probe" command, stating: " linux; GNU C++ version 4.6.3; Boost_105000; UHD_003.008.002-151-gbf4f50de -- Opening a UmTRX device... 192.168.10.2 Error: RuntimeError: NotImplementedError: holler protocol not implemented " I have done a search on Google for the error but there doesn't seem to be any information on it. Do you have any idea what is causing it? Any help would be much appreciated. Should you be interested in knowing the exact commands I ran when following the instructions, let me know and I'll write them out. Regards, Kea

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Query - Running two ARFCN on UmTRX using OsmoBTS
by Andy Avtushenko 24 Apr '15

24 Apr '15

Hello Amber & Sarosh You have to add these lines below into */etc/osmocom/openbsc.cfg *right after trx0 configuration trx 1 rf_locked 0 arfcn 184 (*set the right ARFCN for you here* ) nominal power 23 max_power_red 0 rsl e1 tei 0 timeslot 0 phys_chan_config TCH/F timeslot 1 phys_chan_config TCH/F timeslot 2 phys_chan_config TCH/F timeslot 3 phys_chan_config TCH/F timeslot 4 phys_chan_config TCH/F timeslot 5 phys_chan_config TCH/F timeslot 6 phys_chan_config TCH/F timeslot 7 phys_chan_config TCH/F And add into *etc/osmocom/osmo-bts.cfg* trx 1 rxgain 12 power 0 restart services:* sudo sv restart osmo-trx osmo-bts osmo-nitb* Regarding trx band dividing, theoretically it might possible but we haven't tested that -- Best regards, Andy

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UmTRX April 2015