Difference between revisions of "OpenBTS: GPRS debugging"

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Line 17: Line 17:
 
Kemudian Reboot
 
Kemudian Reboot
  
−
  gprs list ch -v
+
Cek gprs list
 +
 
 +
  gprs list
  
 
Pastikan FER agak lebih besar sedikit dari 0%, misalnya
 
Pastikan FER agak lebih besar sedikit dari 0%, misalnya
  
−
  PDCH ARFCN=50 TN=1 FER=0%
+
  MS#1,TLLI=c000f001,7ac6f2bd rrmode=PacketIdle Bytes:86up/33down Utilization=0%
−
Reservations=()
+
GMM Context: imsi=510881140050498 ptmsi=0xf001 tlli=0xc000f001 state=GmmDeregistered age=1137 idle=1137 IPs=none
−
USFList=( 1=>free 2=>free 3=>free 4=>free 5=>free 6=>free)
+
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) IL
−
TFI=()
+
  ev=(0) RXQual=(0) SigVar=(0) ChCoding=(0)
−
PDCH ARFCN=50 TN=2 FER=0%
+
dataER:.8% (78) recent:0% (0) tbfER:.2% (5)
−
Reservations=()
+
rrbpER:.3% (13) recent:0% (0) ccchER:0% (1) recent:0% (0)
−
USFList=( 1=>free 2=>free 3=>free 4=>free 5=>free 6=>free)
+
  MS#2,TLLI=c000f002,7f90936d rrmode=PacketIdle Bytes:12492up/24408down Utilization=0%
−
TFI=()
+
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=192.16
 +
8.99.100
 +
 
 +
MS 510105852803044 memperoleh IP 192.168.99.100 sementara
 +
MS 510881140050498 tidak memperoleh IP
 +
 
  
 
Jika belum memuaskan, ulangi prosedur di atas.
 
Jika belum memuaskan, ulangi prosedur di atas.
Line 38: Line 69:
  
 
  gprs list ms -cxv
 
  gprs list ms -cxv
−
 
−
 
  
 
==Turunkan RSSI Target==
 
==Turunkan RSSI Target==

Revision as of 10:33, 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) IL
ev=(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=192.16

8.99.100

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

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