| [[bts-examples]] |
| == OsmoNITB example configuration files |
| |
| The `openbsc/doc/examples/osmo-nitb` directory in the OpenBSC source |
| tree contains a collection of example configuration files, sorted by BTS |
| type. |
| |
| This chapter is illustrating some excerpts from those examples |
| |
| [[bts_example_bs11]] |
| === Example configuration for OsmoNITB with one dual-TRX BS-11 |
| |
| .OsmoNITB with BS11, 2 TRX, no frequency hopping |
| ==== |
| |
| ---- |
| e1_input |
| e1_line 0 driver misdn |
| network |
| network country code 1 |
| mobile network code 1 |
| short name OpenBSC |
| long name OpenBSC |
| timer t3101 10 |
| timer t3113 60 |
| bts 0 |
| type bs11 <1> |
| band GSM900 |
| cell_identity 1 |
| location_area_code 1 |
| training_sequence_code 7 |
| base_station_id_code 63 |
| oml e1 line 0 timeslot 1 sub-slot full <2> |
| oml e1 tei 25 <3> |
| trx 0 |
| arfcn 121 |
| max_power_red 0 |
| rsl e1 line 0 timeslot 1 sub-slot full <4> |
| rsl e1 tei 1 <5> |
| timeslot 0 |
| phys_chan_config CCCH+SDCCH4 |
| e1 line 0 timeslot 1 sub-slot full |
| timeslot 1 |
| phys_chan_config TCH/F |
| e1 line 0 timeslot 2 sub-slot 1 <6> |
| timeslot 2 |
| phys_chan_config TCH/F |
| e1 line 0 timeslot 2 sub-slot 2 |
| timeslot 3 |
| phys_chan_config TCH/F |
| e1 line 0 timeslot 2 sub-slot 3 |
| timeslot 4 |
| phys_chan_config TCH/F |
| e1 line 0 timeslot 3 sub-slot 0 |
| timeslot 5 |
| phys_chan_config TCH/F |
| e1 line 0 timeslot 3 sub-slot 1 |
| timeslot 6 |
| phys_chan_config TCH/F |
| e1 line 0 timeslot 3 sub-slot 2 |
| timeslot 7 |
| phys_chan_config TCH/F |
| e1 line 0 timeslot 3 sub-slot 3 |
| trx 1 |
| arfcn 123 |
| max_power_red 0 |
| rsl e1 line 0 timeslot 1 sub-slot full <4> |
| rsl e1 tei 2 <5> |
| timeslot 0 |
| phys_chan_config TCH/F |
| e1 line 0 timeslot 4 sub-slot 0 <6> |
| timeslot 1 |
| phys_chan_config TCH/F |
| e1 line 0 timeslot 4 sub-slot 1 |
| timeslot 2 |
| phys_chan_config TCH/F |
| e1 line 0 timeslot 4 sub-slot 2 |
| timeslot 3 |
| phys_chan_config TCH/F |
| e1 line 0 timeslot 4 sub-slot 3 |
| timeslot 4 |
| phys_chan_config TCH/F |
| e1 line 0 timeslot 5 sub-slot 0 |
| timeslot 5 |
| phys_chan_config TCH/F |
| e1 line 0 timeslot 5 sub-slot 1 |
| timeslot 6 |
| phys_chan_config TCH/F |
| e1 line 0 timeslot 5 sub-slot 2 |
| timeslot 7 |
| phys_chan_config TCH/F |
| e1 line 0 timeslot 5 sub-slot 3 |
| ---- |
| ==== |
| |
| <1> The BTS type must be set to __bs11__ |
| <2> The OML E1 timeslot needs to be identical with what was on the BTS side using LMT. |
| <3> The OML TEI value needs to be identical with what was configured on the BTS side using LMT. |
| <4> The RSL E1 timeslot can be identical for all TRX. |
| <5> The RSL TEI values __must__ be different if multiple TRX share one E1 signalling timeslot. |
| <6> The TCH all need to be allocated one 16k sub-slot on the E1 |
| |
| [[bts_example_nbts]] |
| === Example configuration for OsmoNITB with one single-TRX nanoBTS |
| |
| .OsmoNITB with one single-TRX nanoBTS |
| ==== |
| |
| ---- |
| e1_input |
| e1_line 0 driver ipa <1> |
| network |
| network country code 1 |
| mobile network code 1 |
| short name OpenBSC |
| long name OpenBSC |
| auth policy closed |
| location updating reject cause 13 |
| encryption a5 0 |
| neci 1 |
| rrlp mode none |
| mm info 1 |
| handover 0 |
| bts 0 |
| type nanobts <2> |
| band DCS1800 <3> |
| cell_identity 0 |
| location_area_code 1 |
| training_sequence_code 7 |
| base_station_id_code 63 |
| ms max power 15 |
| cell reselection hysteresis 4 |
| rxlev access min 0 |
| channel allocator ascending |
| rach tx integer 9 |
| rach max transmission 7 |
| ip.access unit_id 1801 0 <4> |
| oml ip.access stream_id 255 line 0 |
| gprs mode none |
| trx 0 |
| rf_locked 0 |
| arfcn 871 <5> |
| nominal power 23 |
| max_power_red 20 <6> |
| rsl e1 tei 0 |
| timeslot 0 |
| phys_chan_config CCCH+SDCCH4 |
| timeslot 1 |
| phys_chan_config SDCCH8 |
| 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 |
| ---- |
| ==== |
| |
| <1> You have to configure one virtual E1 line with the |
| IPA driver in order to use Abis/IP. One e1_line is |
| sufficient for any number of A-bis/IP BTSs, there is no |
| limit like in physical E1 lines. |
| <2> The BTS type must be set using `type nanobts` |
| <3> The GSM band must be set according to the BTS hardware. |
| <4> The IPA Unit ID parameter must be set to what has been configured on |
| the BTS side using the __BTS Manager__ or `ipaccess-config`. |
| <5> The ARFCN of the BTS. |
| <6> All known nanoBTS units have a nominal transmit power of 23 dBm. If |
| a `max_power_red` of 20 (dB) is configured, the resulting output |
| power at the BTS Tx port is 23 - 20 = 3 dBm. |
| |
| [NOTE] |
| ==== |
| The `nominal_power` setting does __not__ influence the transmitted power |
| to the BTS! It is a setting by which the system administrator tells the |
| BSC about the nominal output power of the BTS. The BSC uses this as |
| basis for calculations. |
| ==== |
| |
| |
| [[bts_example_nbts_multi]] |
| === Example configuration for OsmoNITB with multi-TRX nanoBTS |
| |
| .OsmoNITB configured for dual-TRX (stacked) nanoBTS |
| ==== |
| |
| ---- |
| e1_input |
| e1_line 0 driver ipa |
| network |
| network country code 1 |
| mobile network code 1 |
| short name OpenBSC |
| long name OpenBSC |
| auth policy closed |
| location updating reject cause 13 |
| encryption a5 0 |
| neci 1 |
| rrlp mode none |
| mm info 0 |
| handover 0 |
| bts 0 |
| type nanobts |
| band DCS1800 |
| cell_identity 0 |
| location_area_code 1 |
| training_sequence_code 7 |
| base_station_id_code 63 |
| ms max power 15 |
| cell reselection hysteresis 4 |
| rxlev access min 0 |
| channel allocator ascending |
| rach tx integer 9 |
| rach max transmission 7 |
| ip.access unit_id 1800 0 <1> |
| oml ip.access stream_id 255 line 0 |
| gprs mode none |
| trx 0 |
| rf_locked 0 |
| arfcn 871 |
| nominal power 23 |
| max_power_red 0 |
| rsl e1 tei 0 |
| timeslot 0 |
| phys_chan_config CCCH+SDCCH4 |
| timeslot 1 |
| phys_chan_config SDCCH8 |
| 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 |
| trx 1 |
| rf_locked 0 |
| arfcn 873 |
| nominal power 23 |
| max_power_red 0 |
| rsl e1 tei 0 |
| timeslot 0 |
| phys_chan_config SDCCH8 |
| 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 |
| ---- |
| ==== |
| |
| <1> In this example, the IPA Unit ID is specified as `1800 0`. Thus, the |
| first nanoBTS unit (`trx 0`) needs to be configured to 1800/0/0 and |
| the second nanoBTS unit (`trx 1`) needs to be configured to 1800/0/1. |
| You can configure the BTS unit IDs using the `ipaccess-config` |
| utility included in OpenBSC. |
| |
| [NOTE] |
| ==== |
| For building a multi-TRX setup, you also need to connect the TIB cables |
| between the two nanoBTS units, as well as the coaxial/RF AUX cabling. |
| ==== |