Bug #5571
openDUG can come up, but with Avail: "Power Off"
0%
Description
Sometimes, after starting osmo-bsc, The BTS will transmit, we even start to get Channel requests, but this is the status:
OsmoBSC# show trx
TRX 0 of BTS 0 is on ARFCN 251
RF Nominal Power: 37 dBm, reduced by 0 dB, resulting BS power: 37 dBm
Radio Carrier NM State: Oper 'NULL', Admin 'Unlocked', Avail 'Power off'
RSL State: connected
Baseband Transceiver NM State: Oper 'NULL', Admin 'Locked', Avail 'Power off'
E1 Signalling Link:
E1 Line 0, Type e1d: Timeslot 1, Mode RSL
E1 TEI 0, SAPI 0
and of course we get such as this:
DRSL NOTICE <0003> abis_rsl.c:2193 (bts=0) CHAN RQD[Location updating]: no resources for SDCCH 0x4, retrying with TCH_F DRLL DEBUG <0000> lchan_select.c:299 (bts=0) lchan_select_by_type(TCH_F) DRLL DEBUG <0000> lchan_select.c:233 (bts=0) lchan_avail_by_type(TCH_F) DRLL DEBUG <0000> lchan_select.c:65 looking for lchan TCH/F: (bts=0,trx=0) trx not usable DRLL DEBUG <0000> lchan_select.c:65 looking for lchan TCH/F_PDCH as TCH/F without pchan switch: (bts=0,trx=0) trx not usable DRLL DEBUG <0000> lchan_select.c:65 looking for lchan TCH/F_PDCH as TCH/F: (bts=0,trx=0) trx not usable DRLL DEBUG <0000> lchan_select.c:65 looking for lchan TCH/F_TCH/H_SDCCH8_PDCH as TCH/F without pchan switch: (bts=0,trx=0) trx not usable DRLL DEBUG <0000> lchan_select.c:65 looking for lchan TCH/F_TCH/H_SDCCH8_PDCH as TCH/F: (bts=0,trx=0) trx not usable DRLL NOTICE <0000> lchan_select.c:305 (bts=0) Failed to select TCH_F channel
Stopping and restarting osmo-bsc will sooner ( or later :-/ ) get the TRX up....
Attached is osmo-bsc.log of the bring-up and pcap of same.
I suspect there is something happening in a certain order sometimes that causes this?
Files
Updated by keith almost 2 years ago
tnt wrote in #note-3:
By any chance is the TRX well cooled ?
In at least one case where this is observed, the TRX (RUS 01) is mounted in an RBS 6601 - (with rear fans running at full speed as there's nothing to connect to the EC)
Updated by dexter over 1 year ago
Hello Keith,
Thats interesting. I also have issues with the DUG20 I am using for tests. It seems not to like frequent BSC restarts. I see the "TRX 0 not usable" message quite often. A power-cycle usually helps. Can you post your osmo-bsc.cfg as well?
Best regards.
Philipp
Updated by keith over 1 year ago
Hi dexter I don't have the actual config that would have been used when I wrote this six month old ticket. The DUG that was in use died, and it's not the first one we have lost. I don't have a DUG deployed anywhere right now, not even in the lab, as the lab moved house and I have not got around to setting up an antenna rig yet.
That makes 2 we've lost after not so many hours of operation, (apart from the units where we destroyed the serial port with +36V on the GND rail- they still work otherwise) - I have a suspicion that dust might be the culprit. Not that this is related to this issue, I just wonder whether we can expect a DUG to survive if we are blasting cooling air through it that is not filtered or at least reasonably dust free, (IE, not in a wooden hut on top of a windy hill in a semi-desert)
Anyway, the config would have been fairly "standard", that is to say, not much deviation from the example configs that ship with osmo-bsc. One thing possibly relevant would be the sync. IIRC, I see this ticket's issue regardless of if there is a GPS unit present and sync is external, or if we take the clock from the icE1usb
Something similar to this:
log stderr
logging filter all 0
!
stats interval 10
stats reporter statsd
remote-ip 127.0.0.1
remote-port 8125
level global
no prefix
enable
!
line vty
no login
!
e1_input
e1_line 0 driver e1d
e1_line 0 port 0
no e1_line 0 keepalive
e1_line 0 pcap /root/cap/abis.last_start
cs7 instance 0
point-code 0.43.1
network
network country code 334
mobile network code 07
encryption a5 1
neci 1
paging any use tch 0
handover 0
meas-feed destination 127.0.0.1 8888
neighbor-resolution bind 172.16.0.1 4248
bts 0
type rbs2000
description DUG 20
band GSM850
cell_identity 100
location_area_code 274
base_station_id_code 63
ms max power 37
cell reselection hysteresis 4
rxlev access min 0
radio-link-timeout 32
channel allocator descending
channel allocator allow-tch-for-signalling 0
rach tx integer 9
rach max transmission 7
rach max-delay 63
channel-description attach 1
channel-description bs-pa-mfrms 5
channel-description bs-ag-blks-res 1
no access-control-class-ramping
early-classmark-sending forbidden
early-classmark-sending-3g allowed
oml e1 line 0 timeslot 1 sub-slot full
oml e1 tei 62
neighbor-list mode manual
neighbor-list add arfcn 249
codec-support fr
gprs mode none
no force-combined-si
bs-power-control
mode static
ms-power-control
mode dyn-bsc
ctrl-interval 2
step-size inc 4 red 2
rxlev-thresh lower 32 upper 38
rxlev-thresh-comp lower 10 12 upper 19 20
rxqual-thresh lower 3 upper 0
rxqual-thresh-comp lower 5 7 upper 15 18
is-connection-list add 4 512 12
is-connection-list add 16 524 12
is-connection-list add 28 536 12
is-connection-list add 40 548 12
om2000 version-limit oml gen 12 rev 10
om2000 sync-source internal
trx 0
rf_locked 0
arfcn 247
nominal power 37
max_power_red 0
rsl e1 line 0 timeslot 1 sub-slot full
rsl e1 tei 0
om2000 rx-diversity-mode a
timeslot 0
phys_chan_config CCCH
hopping enabled 0
e1 line 0 timeslot 1 sub-slot full
timeslot 1
phys_chan_config SDCCH8
hopping enabled 0
e1 line 0 timeslot 2 sub-slot 1
timeslot 2
phys_chan_config SDCCH8
hopping enabled 0
e1 line 0 timeslot 2 sub-slot 2
timeslot 3
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 2 sub-slot 3
timeslot 4
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 3 sub-slot 0
timeslot 5
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 3 sub-slot 1
timeslot 6
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 3 sub-slot 2
timeslot 7
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 3 sub-slot 3
trx 1
rf_locked 0
arfcn 241
nominal power 37
max_power_red 0
rsl e1 line 0 timeslot 4 sub-slot full
rsl e1 tei 1
om2000 rx-diversity-mode a
timeslot 0
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 5 sub-slot 0
timeslot 1
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 5 sub-slot 1
timeslot 2
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 5 sub-slot 2
timeslot 3
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 5 sub-slot 3
timeslot 4
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 6 sub-slot 0
timeslot 5
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 6 sub-slot 1
timeslot 6
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 6 sub-slot 2
timeslot 7
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 6 sub-slot 3
trx 2
rf_locked 0
arfcn 251
nominal power 37
max_power_red 0
rsl e1 line 0 timeslot 7 sub-slot full
rsl e1 tei 2
om2000 rx-diversity-mode a
timeslot 0
phys_chan_config SDCCH8
hopping enabled 0
e1 line 0 timeslot 8 sub-slot 0
timeslot 1
phys_chan_config SDCCH8
hopping enabled 0
e1 line 0 timeslot 8 sub-slot 1
timeslot 2
phys_chan_config SDCCH8
hopping enabled 0
e1 line 0 timeslot 8 sub-slot 2
timeslot 3
phys_chan_config SDCCH8
hopping enabled 0
e1 line 0 timeslot 8 sub-slot 3
timeslot 4
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 9 sub-slot 0
timeslot 5
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 9 sub-slot 1
timeslot 6
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 9 sub-slot 2
timeslot 7
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 9 sub-slot 3
trx 3
rf_locked 0
arfcn 245
nominal power 40
max_power_red 0
rsl e1 line 0 timeslot 10 sub-slot full
rsl e1 tei 3
om2000 rx-diversity-mode a
timeslot 0
phys_chan_config SDCCH8
hopping enabled 0
e1 line 0 timeslot 11 sub-slot 0
timeslot 1
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 11 sub-slot 1
timeslot 2
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 11 sub-slot 2
timeslot 3
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 11 sub-slot 3
timeslot 4
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 12 sub-slot 0
timeslot 5
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 12 sub-slot 1
timeslot 6
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 12 sub-slot 2
timeslot 7
phys_chan_config TCH/F
hopping enabled 0
e1 line 0 timeslot 12 sub-slot 3
msc 0
codec-list fr1
allow-emergency allow
asp-protocol m3ua
lcls-mode disabled
lcls-codec-mismatch forbidden
mgw remote-ip 127.0.0.1
mgw remote-port 2427
bsc
mid-call-timeout 0
