Difference between revisions of "OpenBTS: GPRS debugging"
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MS#1,TLLI=c000f001,7ac6f2bd rrmode=PacketIdle Bytes:86up/33down Utilization=0% | MS#1,TLLI=c000f001,7ac6f2bd rrmode=PacketIdle Bytes:86up/33down Utilization=0% | ||
GMM Context: imsi=510881140050498 ptmsi=0xf001 tlli=0xc000f001 state=GmmDeregistered age=1137 idle=1137 IPs=none | GMM Context: imsi=510881140050498 ptmsi=0xf001 tlli=0xc000f001 state=GmmDeregistered age=1137 idle=1137 IPs=none | ||
| − | TimingError=(-0.05 min=-0.57 max=0.54 avg=0.08 N=60) RSSI=(-53 min=-56 max=-22 avg=-50.83 N=60) CV=(63 min=55 max=63 avg=60.20 N=5) | + | TimingError=(-0.05 min=-0.57 max=0.54 avg=0.08 N=60) RSSI=(-53 min=-56 max=-22 avg=-50.83 N=60) CV=(63 min=55 max=63 avg=60.20 N=5) ILev=(0) RXQual=(0) SigVar=(0) ChCoding=(0) |
| − | |||
dataER:.8% (78) recent:0% (0) tbfER:.2% (5) | dataER:.8% (78) recent:0% (0) tbfER:.2% (5) | ||
rrbpER:.3% (13) recent:0% (0) ccchER:0% (1) recent:0% (0) | rrbpER:.3% (13) recent:0% (0) ccchER:0% (1) recent:0% (0) | ||
| Line 54: | Line 53: | ||
GMM Context: imsi=510881140050498 ptmsi=0xf001 tlli=0xc000f001 state=GmmDeregistered age=1222 idle=1222 MS#1,TLLI=c000f001,7ac6f2bd IPs=none | GMM Context: imsi=510881140050498 ptmsi=0xf001 tlli=0xc000f001 state=GmmDeregistered age=1222 idle=1222 MS#1,TLLI=c000f001,7ac6f2bd IPs=none | ||
| − | GMM Context: imsi=510105852803044 ptmsi=0xf002 tlli=0xc000f002 state=GmmRegisteredNormal age=157 idle=9 MS#2,TLLI=c000f002,7f90936d IPs=192. | + | GMM Context: imsi=510105852803044 ptmsi=0xf002 tlli=0xc000f002 state=GmmRegisteredNormal age=157 idle=9 MS#2,TLLI=c000f002,7f90936d IPs=192.168.99.100 |
| − | |||
MS 510105852803044 memperoleh IP 192.168.99.100 sementara | MS 510105852803044 memperoleh IP 192.168.99.100 sementara | ||
Latest revision as of 10:37, 14 March 2015
RXGain
Kita perlu menset
GSM.Radio.RxGain
agar FER cukup baik & MS memperoleh IP address.
Masuk ke CLI.
Set
devconfig GSM.Radio.RxGain 44
Nilai default GSM.Radio.RxGain 48
Kemudian Reboot
Cek gprs list
gprs list
Pastikan FER agak lebih besar sedikit dari 0%, misalnya
MS#1,TLLI=c000f001,7ac6f2bd rrmode=PacketIdle Bytes:86up/33down Utilization=0% GMM Context: imsi=510881140050498 ptmsi=0xf001 tlli=0xc000f001 state=GmmDeregistered age=1137 idle=1137 IPs=none TimingError=(-0.05 min=-0.57 max=0.54 avg=0.08 N=60) RSSI=(-53 min=-56 max=-22 avg=-50.83 N=60) CV=(63 min=55 max=63 avg=60.20 N=5) ILev=(0) RXQual=(0) SigVar=(0) ChCoding=(0) dataER:.8% (78) recent:0% (0) tbfER:.2% (5) rrbpER:.3% (13) recent:0% (0) ccchER:0% (1) recent:0% (0) MS#2,TLLI=c000f002,7f90936d rrmode=PacketIdle Bytes:12492up/24408down Utilization=0% GMM Context: imsi=510105852803044 ptmsi=0xf002 tlli=0xc000f002 state=GmmRegisteredNormal age=72 idle=2 IPs=192.168.99.100 TimingError=(-0.21 min=-1.40 max=1.83 avg=0.21 N=2148) RSSI=(-46 min=-58 max=-9 avg=-46.08 N=2148) CV=(63 min=0 max=63 avg=61.50 N=42) ILev=(0) RXQual=(0 min=0 max=4 avg=0.20 N=35) SigVar=(0 min=0 max=63 avg=2.43 N=35) ChCoding=(0 min=0 max=3 avg=0.00 N=1353) dataER:.4% (3426) recent:.6% (1263) low:1.0% (144) tbfER:.5% (15) rrbpER:.4% (231) recent:.5% (57) low:1.0% (8) ccchER:1.0% (7) recent:1.0% (7) low:1.0% (1) TBF#19 mtMS= MS#2,TLLI=c000f002,7f90936d mtDir=RLCDir::Down channels: down=( 0:1 0:2 0:3) up=( 0:2,usf=0 0:3,usf=0) mtState==TBFState::Dead mtAttached=1 mtTFI=19 mtTlli=0xc000f002 size=323 TBF#20 mtMS= MS#2,TLLI=c000f002,7f90936d mtDir=RLCDir::Down channels: down=( 0:1 0:2 0:3) up=( 0:2,usf=0 0:3,usf=0) mtState==TBFState::DataWaiting1 mtAttached=1 mtTFI=20 mtTlli=0xc000f002 size=0 PDCH ARFCN=620 TN=1 FER=98% PDCH ARFCN=620 TN=2 FER=36% PDCH ARFCN=620 TN=3 FER=23%
Cek sgsn list
sgsn list
Pastikan MS menperoleh IP address
GMM Context: imsi=510881140050498 ptmsi=0xf001 tlli=0xc000f001 state=GmmDeregistered age=1222 idle=1222 MS#1,TLLI=c000f001,7ac6f2bd IPs=none GMM Context: imsi=510105852803044 ptmsi=0xf002 tlli=0xc000f002 state=GmmRegisteredNormal age=157 idle=9 MS#2,TLLI=c000f002,7f90936d IPs=192.168.99.100
MS 510105852803044 memperoleh IP 192.168.99.100 sementara MS 510881140050498 tidak memperoleh IP
Jika belum memuaskan, ulangi prosedur di atas.
Set lagi GSM.Radio.RxGain
Jika FER sedikit di atas 0%, semoga MS memperoleh IP address.
Cek
gprs list ms -cxv
Turunkan RSSI Target
Coba
- naikan Channels.Min.C0 & TBF.Retry
- turunkan RSSI
config GPRS.Channels.Min.C0 4 config GPRS.TBF.Retry 4 devconfig GPRS.ChannelCodingControl.RSSI -60 devconfig GSM.Radio.RSSITarget -70
Kemudian Reboot
Mengatasi Tidak dialokasikan IP ke MS
Ubah konfigurasi GGSN
config GGSN.Firewall.Enable 0 config GGSN.DNS 8.8.8.8 config GGSN.DNS 8.8.8.8 8.8.4.4 (untuk 2 DNS server)
Melihat log GGSN
devconfig GGSN.Logfile.Name /tmp/GGSN.log
hasil awalnya
18:11:06.7:Initializing Mini GGSN Wed Mar 4 18:11:06 2015 18:11:06.7:GGSN logging to file /tmp/GGSN.log 18:11:06.7:GGSN Configuration: 18:11:06.7: GGSN.MS.IP.Base=192.168.99.1 18:11:06.7: GGSN.MS.IP.MaxCount=254 18:11:06.7: GGSN.MS.IP.Route=192.168.99.0/24 18:11:06.7: GGSN.IP.MaxPacketSize=1520 18:11:06.7: GGSN.IP.ReuseTimeout=180 18:11:06.7: GGSN.Firewall.Enable=0 18:11:06.7: GGSN.IP.TossDuplicatePackets=0 18:11:06.7:GGSN: DNS servers: 8.8.8.8 0.0.0.0 18:11:06.7:ip link set sgsntun up 18:11:06.9:ip route add to 192.168.99.0/24 dev sgsntun
Menaikan Channel GPRS
OpenBTS> load
== GSM == SDCCH load: 0/4 TCH/F load: 0/5 AGCH/PCH load: 0,0 Paging table size: 0 Transactions: 0 T3122: 2000 ms (target 5000 ms) == GPRS == current PDCHs: 2 utilization: 0%
Ada 2 PDCHs untuk GPRS, ini bisa di naikan, misalnya
config GPRS.Channels.Min.C0 5
Cek load
OpenBTS> load
== GSM == SDCCH load: 0/4 TCH/F load: 0/2 AGCH/PCH load: 0,0 Paging table size: 0 Transactions: 0 T3122: 2000 ms (target 5000 ms) == GPRS == current PDCHs: 5 utilization: 0%
Sekarang PDCHs menjadi 5 dan TCH/F menjadi 2