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70 lines
1.9 KiB
Plaintext
70 lines
1.9 KiB
Plaintext
[[overview]]
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== Overview
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This manual should help you getting started with OsmoHLR. It will cover
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aspects of configuring and running the OsmoHLR.
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[[intro_overview]]
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=== About OsmoHLR
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OsmoHLR is Osmocom's minimal implementation of a Home Location Register (HLR)
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for 2G and 3G GSM and UMTS mobile core networks. Its interfaces are:
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- GSUP, serving towards OsmoMSC and OsmoSGSN;
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- A local SQLite database;
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- The Osmocom typical telnet VTY and CTRL interfaces.
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Originally, the OpenBSC project's OsmoNITB all-in-one implementation had an
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integrated HLR, managing subscribers and SMS in the same local database. Along
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with the separate OsmoMSC and its new VLR component, OsmoHLR was implemented
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from scratch to alleviate various shortcomings of the internal HLR:
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- The separate HLR allows using centralized subscriber management for both
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circuit-switched and packet-switched domains (i.e. one OsmoHLR for both
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OsmoMSC and OsmoSGSN).
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- VLR and HLR brought full UMTS AKA (Authentication and Key Agreement) support,
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i.e. Milenage authentication in both the full 3G variant as well as the
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backwards compatible 2G variant.
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- In contrast to the OsmoNITB, the specific way the new OsmoMSC's VLR accesses
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OsmoHLR brings fully asynchronous subscriber database access.
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Find the OsmoHLR issue tracker and wiki online at
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- https://osmocom.org/projects/osmo-hlr
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- https://osmocom.org/projects/osmo-hlr/wiki
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[[fig-gsm]]
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.Typical GSM network architecture used with OsmoHLR
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[graphviz]
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----
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digraph G {
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rankdir=LR;
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subgraph cluster_hlr {
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label = "OsmoHLR";
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GSUP [label="GSUP server"]
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DB [label="SQLite DB"]
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GSUP->DB
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DB->CTRL [dir="back"]
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DB->VTY [dir="back"]
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}
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Admin [label="Admin and\nMaintenance"]
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SW [label="3rd party software\nintegration"]
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VTY->Admin [dir="back"]
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CTRL->SW [dir="back"]
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MSC [label="MSC/VLR"]
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MSC->GSUP [label="GSUP"]
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SGSN->GSUP [label="GSUP"]
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BSC->MSC
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HNBGW->MSC
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HNBGW->SGSN
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PCU->SGSN
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}
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----
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