Cellular Network Infrastructure

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h1. OsmoNITB Migration Guide

Historically, Osmocom offered the [[OsmoNITB:]] "Network-In-The-Box" as an actual single program. It was a useful simplification at the time, but in 2017, Osmocom have decided to split OsmoNITB into programs more closely resembling traditional network architecture. It is recommended to use the new separate components instead of the OsmoNITB, since active development focus has moved there.

Creating a new Network In The Box from scratch is described at [[Osmocom Network In The Box]], please refer to that page to complement the descriptions found here.

This page aims at describing the steps necessary to move from a working operation of osmo-nitb to the new split components.

h1. Subscriber Database

With OsmoHLR comes *@osmo-hlr-db-tool@*, which is capable of importing the most important subscriber data from a database that was used with OsmoNITB.

In a standard installation, the osmo-nitb database should be found at @/var/lib/osmocom/hlr.sqlite3@, and the osmo-hlr database is expected at @/var/lib/osmocom/hlr.db@. Hence the migration command becomes:

<pre>

osmo-hlr-db-tool --database /var/lib/osmocom/hlr.db --import-nitb-db /var/lib/osmocom/hlr.sqlite3

</pre>

If no @--database@ is passed, @./hlr.db@ is assumed.

If the target @hlr.db@ does not exist yet, it is created.

If no @--import-nitb-db@ is passed, a @hlr.db@ without any subscriber data is created.

You may repeat / combine imports to the same @hlr.db@; any subscribers that already exist will be skipped with an error message. It is possible to do an import while osmo-hlr is actively using the database, but that is not recommended.

Take care that the resulting hlr.db has the proper read and write permissions by the user that will run OsmoHLR. Probably, the same ownership and permissions that the previous OsmoNITB database had is the correct choice.

Note that not all information is copied to the hlr.db, just IMSI and 2G auth tokens.

To avoid future confusion, it may be desirable to remove the legacy hlr.sqlite3 from the system (i.e. backup to somewhere else), or rename it to something like @osmo-nitb.db@, so that it is not mistaken for the OsmoHLR database.

h1. Configuration Files

Most of the current OsmoNITB config options still exist, but are now moved to OsmoMSC or OsmoBSC. Few are required in both.

New configuration is available to set up:

* the GSUP connection from OsmoMSC to the OsmoHLR, and

* the SCCP connection for the A-interface between OsmoBSC and OsmoMSC, established via OsmoSTP.

Let's take this standard OsmoNITB configuration and split it up in OsmoBSC and OsmoMSC parts:

*OsmoNITB config*:

<pre>

e1_input

 e1_line 0 driver ipa

 ipa bind 10.42.42.2

network

 network country code 901

 mobile network code 70

 short name osmo-gsm-tester-nitb

 long name osmo-gsm-tester-nitb

 auth policy closed

 location updating reject cause 13

 encryption a5 0

 neci 1

 rrlp mode none

 mm info 1

 handover 0

 handover window rxlev averaging 10

 handover window rxqual averaging 1

 handover window rxlev neighbor averaging 10

 handover power budget interval 6

 handover power budget hysteresis 3

 handover maximum distance 9999

 bts 0

  type sysmobts

  band GSM-1800

  cell_identity 0

  location_area_code 23

  training_sequence_code 7

  base_station_id_code 63

  ms max power 33

  cell reselection hysteresis 4

  rxlev access min 0

  channel allocator ascending

  rach tx integer 9

  rach max transmission 7

  ip.access unit_id 1 0

  oml ip.access stream_id 255 line 0

  gprs mode none

  trx 0

   rf_locked 0

   arfcn 868

   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

smpp

 local-tcp-ip 10.42.42.2 2775

 system-id test-nitb

 policy closed

ctrl

 bind 10.42.42.2

</pre>

*OsmoBSC config*:

<pre>

e1_input

 e1_line 0 driver ipa

 ipa bind 10.42.42.5

cs7 instance 1

 point-code 0.0.2

 sccp-address bsc_local

  point-code 0.0.2

  routing-indicator PC

 sccp-address msc_remote

  point-code 0.0.1

  routing-indicator PC

network

 network country code 901

 mobile network code 70

 short name osmo-gsm-tester-msc

 long name osmo-gsm-tester-msc

 auth policy closed

 location updating reject cause 13

 encryption a5 0

 authentication optional

 neci 1

 rrlp mode none

 mm info 1

 handover 0

 handover window rxlev averaging 10

 handover window rxqual averaging 1

 handover window rxlev neighbor averaging 10

 handover power budget interval 6

 handover power budget hysteresis 3

 handover maximum distance 9999

 bts 0

  type sysmobts

  band GSM-1800

  cell_identity 0

  location_area_code 23

  training_sequence_code 7

  base_station_id_code 63

  ms max power 33

  cell reselection hysteresis 4

  rxlev access min 0

  channel allocator ascending

  rach tx integer 9

  rach max transmission 7

  ip.access unit_id 1 0

  oml ip.access stream_id 255 line 0

  gprs mode none

  trx 0

   rf_locked 0

   arfcn 868

   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

msc

 token msc_token_23_42

 core-mobile-country-code 901

 core-mobile-network-code 70

 ip.access rtp-base 8000

 timeout-ping 1800

 timeout-ping advanced

 timeout-pong 60

 codec-list hr3

 dest 151.80.237.229 5000 184

 amr-config 12_2k forbidden

 amr-config 10_2k forbidden

 amr-config 7_95k forbidden

 amr-config 7_40k forbidden

 amr-config 6_70k forbidden

 amr-config 5_90k allowed

 amr-config 5_15k forbidden

 amr-config 4_75k forbidden

 msc-addr msc_remote

 bsc-addr bsc_local

</pre>

*OsmoMSC config*:

<pre>

network

 network country code 901

 mobile network code 70

 short name osmo-gsm-tester-msc

 long name osmo-gsm-tester-msc

 auth policy closed

 location updating reject cause 13

 encryption a5 0

 authentication optional

cs7 instance 0

 point-code 0.0.1

msc

 mgcpgw remote-ip 10.42.42.3

 assign-tmsi

 cs7-instance-iu 0

 cs7-instance-a 0

ctrl

 bind 10.42.42.4

smpp

 local-tcp-ip 10.42.42.4 2775

 system-id test-msc

 policy closed

hlr

 remote-ip 10.42.42.2

</pre>

h1. Service Files

TODO