Difference between revisions of "OpenBTS: GPRS debugging"
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| + | ==RXGain== | ||
| + | |||
Kita perlu menset | Kita perlu menset | ||
| Line 36: | Line 38: | ||
gprs list ms -cxv | 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 | ||
Revision as of 06:53, 9 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
gprs list ch -v
Pastikan FER agak lebih besar sedikit dari 0%, misalnya
PDCH ARFCN=50 TN=1 FER=0% Reservations=() USFList=( 1=>free 2=>free 3=>free 4=>free 5=>free 6=>free) TFI=() PDCH ARFCN=50 TN=2 FER=0% Reservations=() USFList=( 1=>free 2=>free 3=>free 4=>free 5=>free 6=>free) TFI=()
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