OsmoMGW » History » Version 20
dexter, 08/10/2022 10:01 AM
| 1 | 1 | neels | h1. OsmoMGW |
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| 2 | |||
| 3 | 3 | laforge | OsmoMGW, the Osmocom Media Gateway, is a Media Gateway for handling user plane (voice) traffic in cellular networks. |
| 4 | 1 | neels | |
| 5 | 12 | laforge | OsmoMGW supports the IETF "MGCP":https://tools.ietf.org/html/rfc3435 (Media Gateway Control Protocol) for control from Call Agents, such as those present in [[OsmoBSC:]] and [[OsmoMSC:]]. |
| 6 | 3 | laforge | |
| 7 | 16 | dexter | At the moment (August 2022), OsmoMGW implements RTP proxy / RTP bridge type endpoints, to each of which two RTP connections can be established. It also implements RTP / E1 endpoints that allow bridging RTP voice streams to bit synchronous E1 lines. Since each codec uses a specific TRAU format, the codec support is currently limited to GSM-FR and GSM-EFR. |
| 8 | 3 | laforge | |
| 9 | We are planning to add endpoint types for |
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| 10 | * classic E1/T1 timeslots (64kBps alaw/ulaw) |
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| 11 | * announcement/playout end-points |
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| 12 | * conference endpoints |
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| 13 | |||
| 14 | OsmoMGW is the generalized version of an earlier much more special-purpsoe implementation called osmo-bsc_mgcp. |
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| 15 | |||
| 16 | h2. Situation in a typical Osmocom cellular network |
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| 17 | |||
| 18 | 20 | dexter | h3. Use by [[OsmoBSC:]] with [[OsmoBTS:]] |
| 19 | 3 | laforge | |
| 20 | {{graphviz_link() |
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| 21 | digraph G { |
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| 22 | rankdir = LR; |
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| 23 | OsmoBTS -> OsmoBSC [label="Abis/IP"]; |
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| 24 | 19 | dexter | OsmoBSC -> "core network" [label="3GPP AoIP"]; |
| 25 | 3 | laforge | OsmoBSC -> OsmoMGW [label="MGCP"]; |
| 26 | 1 | neels | OsmoBTS -> OsmoMGW [label="RTP",dir=both]; |
| 27 | 20 | dexter | OsmoMGW -> "core network" [label="RTP",dir=both]; |
| 28 | {rank=same OsmoBSC OsmoMGW} |
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| 29 | OsmoMGW [color=red]; |
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| 30 | } |
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| 31 | }} |
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| 32 | |||
| 33 | h3. Use by [[OsmoBSC:]] with E1 BTS |
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| 34 | |||
| 35 | {{graphviz_link() |
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| 36 | digraph G { |
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| 37 | rankdir = LR; |
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| 38 | "E1 BTS" -> OsmoBSC [label="Abis/E1"]; |
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| 39 | OsmoBSC -> "core network" [label="3GPP AoIP"]; |
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| 40 | OsmoBSC -> OsmoMGW [label="MGCP"]; |
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| 41 | "E1 BTS" -> OsmoMGW [label="TRAU/E1",dir=both]; |
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| 42 | 19 | dexter | OsmoMGW -> "core network" [label="RTP",dir=both]; |
| 43 | 3 | laforge | {rank=same OsmoBSC OsmoMGW} |
| 44 | OsmoMGW [color=red]; |
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| 45 | } |
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| 46 | }} |
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| 47 | |||
| 48 | 6 | fixeria | h3. Use by [[OsmoMSC:]] |
| 49 | 3 | laforge | |
| 50 | It is Planned to use OsmoMGW also from OsmoMSC like this: |
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| 51 | |||
| 52 | {{graphviz_link() |
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| 53 | digraph G { |
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| 54 | rankdir = LR; |
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| 55 | BTS -> BSC [label="Abis"]; |
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| 56 | BSC -> OsmoMSC [label="3GPP AoIP"]; |
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| 57 | OsmoMSC -> OsmoMGW [label="MGCP"]; |
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| 58 | BSC -> OsmoMGW [label="RTP",dir=both]; |
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| 59 | OsmoMSC -> OsmoSIP [label="MNCC"]; |
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| 60 | OsmoSIP -> PBX [label="SIP Trunk"]; |
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| 61 | OsmoMGW -> PBX [label="RTP",dir=both]; |
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| 62 | {rank=same OsmoMSC OsmoMGW} |
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| 63 | OsmoSIP [label="osmo-sip-connector"]; |
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| 64 | OsmoMGW [color=red]; |
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| 65 | |||
| 66 | hNodeB -> OsmoHNBGW [label="Iuh"]; |
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| 67 | 5 | laforge | OsmoHNBGW -> OsmoMSC [label="IuCS"]; |
| 68 | 3 | laforge | hNodeB -> OsmoMGW [label="RTP",dir=both]; |
| 69 | } |
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| 70 | }} |
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| 71 | |||
| 72 | 10 | laforge | {{include(cellular-infrastructure:MacroBinaryPackages)}} |
| 73 | |||
| 74 | 2 | neels | h2. User Manuals |
| 75 | 1 | neels | |
| 76 | 13 | daniel | * osmo-mgw user manual: http://ftp.osmocom.org/docs/latest/osmomgw-usermanual.pdf |
| 77 | 7 | laforge | * osmo-mgw VTY reference: http://ftp.osmocom.org/docs/latest/osmomgw-vty-reference.pdf |
| 78 | 3 | laforge | |
| 79 | 11 | laforge | h2. Source code |
| 80 | |||
| 81 | 15 | laforge | The source code is available from @gitea.osmocom.org@ (module @osmo-mgw@). |
| 82 | 11 | laforge | |
| 83 | Public read-only access is available via |
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| 84 | <pre> |
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| 85 | 15 | laforge | git clone https://gitea.osmocom.org/cellular-infrastructure/osmo-mgw |
| 86 | 11 | laforge | </pre> |
| 87 | |||
| 88 | 15 | laforge | You can browse it via gitea: https://gitea.osmocom.org/cellular-infrastructure/osmo-mgw |
| 89 | 11 | laforge | |
| 90 | Contributions are welcome via [[cellular-infrastructure:Gerrit]]. |
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| 91 | |||
| 92 | 8 | laforge | h2. Test Suite |
| 93 | |||
| 94 | We have a TTCN-3 test suite as part of our [[cellular-infrastructure:Titan_TTCN3_Testsuites]] |
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| 95 | 15 | laforge | * source code: https://gitea.osmocom.org/ttcn3/osmo-ttcn3-hacks/src/branch/master/mgw |
| 96 | 8 | laforge | * results: https://jenkins.osmocom.org/jenkins/view/TTCN3/job/ttcn3-mgw-test/ |
| 97 | |||
| 98 | 3 | laforge | h2. Contact |
| 99 | |||
| 100 | 9 | laforge | * Contact us via the openbsc@ mailing list, see [[cellular-infrastructure:Mailing Lists]]. |
| 101 | * Contributions are welcome via [[cellular-infrastructure:Gerrit]]. |
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| 102 | 15 | laforge | * Git repository browser at https://gitea.osmocom.org/cellular-infrastructure/osmo-mgw |
| 103 | 14 | laforge | |
| 104 | {{include(cellular-infrastructure:MacroCommercialSupport)}} |
