117 lines
3.9 KiB
Plaintext
117 lines
3.9 KiB
Plaintext
[[abis]]
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== Abis/IP Interface
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=== A-bis Operation & Maintenance Link
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The GSM Operation & Maintenance Link (OML) is specified in 3GPP TS
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12.21 and is used between a GSM Base-Transceiver-Station (BTS) and a GSM
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Base-Station-Controller (BSC). The default TCP port for OML is __3002__.
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The connection will be opened from the BTS to the BSC.
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Abis OML is only specified over E1 interfaces. The Abis/IP
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implementation of OsmoBTS and OsmoBSC extend and/or deviate from the TS
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12.21 specification in several ways. Please see the _OsmoBTS Abis
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Protocol Specification_ <<osmobts-abis-spec>> for more information.
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=== A-bis Radio Signalling Link
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The GSM Radio Signalling Link (RSL) is specified in 3GPP TS 08.58 and is
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used between a GSM Base-Transceiver-Station and a GSM
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Base-Station-Controller (BSC). The default TCP port for RSL is __3003__.
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The connection will be opened from the BTS to BSC after it has been
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instructed by the BSC.
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Abis RSL is only specified over E1 interfaces. The Abis/IP
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implementation of OsmoBTS and OsmoBSC extend and/or deviate from the TS
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08.58 specification in several ways. Please see the _OsmoBTS Abis
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Protocol Specification_ <<osmobts-abis-spec>> for more information.
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=== Locate Abis/IP based BTS
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We can use a tool called abisip-find to be able to find BTS which is
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connected in the network. This tool is located in the OsmoBSC project
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repository under:
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'./src/ipaccess'
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==== abisip-find
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abisip-find is a small command line tool which is used to search and
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find BTS devices in your network (e.g. sysmoBTS, nanoBTS).
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It uses broadcast packets of the UDP variant of the Abis-IP protocol
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on port 3006, and thus will find any BTS that can be reached by the
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all-network broadcast address 255.255.255.255
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When program is started it will print one line for each BTS it can find.
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.Example: using abisip-find to find BTS in your network
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----
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$ ./abisip-find
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abisip-find (C) 2009 by Harald Welte
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This is FREE SOFTWARE with ABSOLUTELY NO WARRANTY
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you might need to specify the outgoing
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network interface, e.g. ``abisip-find eth0``
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Trying to find ip.access BTS by broadcast UDP...
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MAC_Address='24:62:78:01:02:03' IP_Address='192.168.0.171' Serial_Number='123'
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Unit_ID='sysmoBTS 1002'
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MAC_Address='24:62:78:04:05:06' IP_Address='192.168.0.182' Serial_Number='456'
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Unit_ID='sysmoBTS 1002'
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MAC Address='00:01:02:03:04:05' IP Address='192.168.100.123' Unit ID='65535/0/0'
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Location_1='' Location 2='BTS_NBT131G' Equipment Version='165a029_55'
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Software Version='168a302_v142b13d0' Unit Name='nbts-00-02-95-00-4E-B3'
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Serial Number='00123456'
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^C
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----
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You may have to start the program as a root:
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----
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$ sudo ./abisip-find eth0
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----
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=== Deploying a new nanoBTS
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A tool called ipaccess-config can be used to configure a new ip.access nanoBTS.
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==== ipaccess-config
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This program is very helpful tool which is used to configure Unit ID and
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Primary OML IP. You can find this tool in the OsmoBSC repository under:
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'./src/ipaccess'
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.Example: using ipaccess-config to configure Unit ID and Primary OML IP of
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nanoBTS
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----
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$ ./ipaccess-config -u 1801/0/0<1> 10.9.1.195<2> -o 10.9.1.154<3>
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ipaccess-config (C) 2009-2010 by Harald Welte and others
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This is FREE SOFTWARE with ABSOLUTELY NO WARRANTY
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Trying to connect to ip.access BTS ...
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abis_nm.c:316 OC=SITE-MANAGER(00) INST=(ff,ff,ff) STATE CHG:
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OP_STATE=Disabled AVAIL=Not installed(07)
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abis_nm.c:316 OC=BTS(01) INST=(00,ff,ff) STATE CHG:
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OP_STATE=Disabled AVAIL=Not installed(07) ADM=Locked
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abis_nm.c:316 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) STATE CHG:
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OP_STATE=Disabled AVAIL=Not installed(07) ADM=Locked
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OML link established using TRX 0
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setting Unit ID to '1801/0/0'
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setting primary OML link IP to '10.9.1.154'
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abis_nm.c:316 OC=CHANNEL(03) INST=(00,00,00) STATE CHG:
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OP_STATE=Disabled AVAIL=Not installed(07) ADM=Locked
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...
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abis_nm.c:2433 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) IPACCESS(0xf0):
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SET NVATTR ACK
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Set the NV Attributes.
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----
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<1> Unit ID
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<2> IP address of the NITB
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<3> IP address of the nanoBTS
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