OsmoMSC » History » Version 17
fixeria, 06/04/2019 09:42 PM
| 1 | 1 | neels | h1. OsmoMSC |
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| 2 | |||
| 3 | 4 | laforge | OsmoMSC is the Osmocom implementation of a Mobile Switching Center (MSC). |
| 4 | |||
| 5 | It implements the following interfaces: |
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| 6 | * 3GPP AoIP over M3UA or SUA towards BSCs, for example [[OsmoBSC:]], possibly via a STP like [[OsmoSTP:]] |
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| 7 | 9 | laforge | * 3GPP IuCS over M3UA or SUA towards RNCs or HNBGWs, for example [[OsmoHNBGW:]], possibly via a STP like [[OsmoSTP:]] |
| 8 | 17 | fixeria | * Osmocom [[cellular-infrastructure:GSUP]] (alternative to SS7/TACP/MAP) towards an HLR such as [[OsmoHLR:]] |
| 9 | ** Subscriber management |
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| 10 | ** Supplementary Services (SS/USSD) |
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| 11 | ** Short Message Service (SMS) |
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| 12 | ** inter-MSC handover |
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| 13 | 16 | laforge | * [[SMPP]] v3.4 for external SMS entities (minimal SMSC is built-in) |
| 14 | * [[MGCP]] for controlling an external Media Gateway like [[OsmoMGW:]] |
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| 15 | * [[MNCC]] for external call-control handlers, such as [[osmo-sip-connector:]] for SIP trunks |
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| 16 | 4 | laforge | * Osmocom VTY interface for configuration + introspection |
| 17 | * Osmocom CTRL interface for programmatic access to internal state/configuration |
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| 18 | |||
| 19 | 6 | laforge | h2. Position in a typical network |
| 20 | |||
| 21 | 4 | laforge | {{graphviz_link() |
| 22 | digraph G { |
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| 23 | rankdir = LR; |
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| 24 | OsmoBTS -> OsmoBSC [label="Abis/IP"]; |
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| 25 | OsmoBSC -> OsmoMSC [label="3GPP AoIP"]; |
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| 26 | 8 | laforge | hNodeB -> OsmoHNBGW [label="Iuh"]; |
| 27 | OsmoHNBGW -> OsmoMSC [label="IuCS"]; |
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| 28 | 4 | laforge | OsmoMSC -> OsmoHLR [label="GSUP"]; |
| 29 | OsmoMSC -> OsmoSIP [label="MNCC"]; |
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| 30 | OsmoMSC [color=red]; |
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| 31 | 11 | laforge | { rank=same; OsmoMSC; OsmoMGW }; |
| 32 | OsmoMSC -> OsmoMGW [label="MGCP"]; |
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| 33 | 4 | laforge | OsmoSIP [label="osmo-sip-connector"]; |
| 34 | 8 | laforge | OsmoSIP -> PBX [label="SIP Trunk"]; |
| 35 | 4 | laforge | } |
| 36 | }} |
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| 37 | |||
| 38 | h2. History |
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| 39 | |||
| 40 | OsmoMSC was the result of splitting [[OsmoNITB:]] into three parts during the 2017 NITB-split. Parts of [[OsmoNITB:]] became [[OsmoBSC:]], other parts became [[OsmoHLR:]], while the mobility management, call control and SMS handling became [[OsmoMSC:]]. At the time of the rewrite, the entire MSC and VLR state machines have been properly re-implemented using "osmo-fsm":http://ftp.osmocom.org/api/latest/libosmocore/core/html/group__fsm.html |
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| 41 | |||
| 42 | 13 | laforge | {{include(cellular-infrastructure:MacroBinaryPackages)}} |
| 43 | |||
| 44 | 7 | laforge | h2. Manuals |
| 45 | |||
| 46 | * "osmomsc-usermanual.pdf":http://ftp.osmocom.org/docs/latest/osmomsc-usermanual.pdf |
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| 47 | * "osmomsc-vty-reference.pdf":http://ftp.osmocom.org/docs/latest/osmomsc-vty-reference.pdf |
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| 48 | 13 | laforge | |
| 49 | h2. Source code |
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| 50 | |||
| 51 | The source code is available from @git.osmocom.org@ (module @osmo-msc@). |
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| 52 | |||
| 53 | Public read-only access is available via |
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| 54 | <pre> |
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| 55 | git clone git://git.osmocom.org/osmo-msc.git |
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| 56 | </pre> |
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| 57 | |||
| 58 | You can browse it via cgit: https://git.osmocom.org/osmo-msc |
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| 59 | |||
| 60 | Contributions are welcome via [[cellular-infrastructure:Gerrit]]. |
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| 61 | 7 | laforge | |
| 62 | 12 | laforge | h2. Test Suite |
| 63 | |||
| 64 | We have a TTCN-3 test suite as part of our [[cellular-infrastructure:Titan_TTCN3_Testsuites]] |
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| 65 | * source code: http://git.osmocom.org/osmo-ttcn3-hacks/tree/msc |
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| 66 | * results: https://jenkins.osmocom.org/jenkins/view/TTCN3/job/ttcn3-msc-test/ |
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| 67 | |||
| 68 | 4 | laforge | h2. Contact |
| 69 | |||
| 70 | 15 | laforge | * Contact us via the openbsc@ mailing list, see [[cellular-infrastructure:Mailing Lists]]. |
| 71 | 14 | laforge | * Contributions are welcome via [[cellular-infrastructure:Gerrit]]. |
| 72 | 4 | laforge | * Git repository browser at https://git.osmocom.org/osmo-msc |
