| Neels Hofmeyr | 25dd785 | 2017-09-25 16:37:34 +0200 | [diff] [blame] | 1 | [[overview]] |
| 2 | == Overview |
| 3 | |
| 4 | This manual should help you getting started with OsmoHLR. It will cover |
| 5 | aspects of configuring and running the OsmoHLR. |
| 6 | |
| 7 | [[intro_overview]] |
| 8 | === About OsmoHLR |
| 9 | |
| 10 | OsmoHLR is Osmocom's minimal implementation of a Home Location Register (HLR) |
| 11 | for 2G and 3G GSM and UMTS mobile core networks. Its interfaces are: |
| 12 | |
| 13 | - GSUP, serving towards OsmoMSC and OsmoSGSN; |
| 14 | - A local SQLite database; |
| 15 | - The Osmocom typical telnet VTY and CTRL interfaces. |
| 16 | |
| 17 | Originally, the OpenBSC project's OsmoNITB all-in-one implementation had an |
| 18 | integrated HLR, managing subscribers and SMS in the same local database. Along |
| 19 | with the separate OsmoMSC and its new VLR component, OsmoHLR was implemented |
| 20 | from scratch to alleviate various shortcomings of the internal HLR: |
| 21 | |
| 22 | - The separate HLR allows using centralized subscriber management for both |
| 23 | circuit-switched and packet-switched domains (i.e. one OsmoHLR for both |
| 24 | OsmoMSC and OsmoSGSN). |
| 25 | |
| 26 | - VLR and HLR brought full UMTS AKA (Authentication and Key Agreement) support, |
| 27 | i.e. Milenage authentication in both the full 3G variant as well as the |
| 28 | backwards compatible 2G variant. |
| 29 | |
| 30 | - In contrast to the OsmoNITB, the specific way the new OsmoMSC's VLR accesses |
| 31 | OsmoHLR brings fully asynchronous subscriber database access. |
| 32 | |
| 33 | Find the OsmoHLR issue tracker and wiki online at |
| 34 | |
| 35 | - https://osmocom.org/projects/osmo-hlr |
| 36 | - https://osmocom.org/projects/osmo-hlr/wiki |
| 37 | |
| 38 | |
| 39 | [[fig-gsm]] |
| 40 | .Typical GSM network architecture used with OsmoHLR |
| 41 | [graphviz] |
| 42 | ---- |
| 43 | digraph G { |
| 44 | rankdir=LR; |
| 45 | subgraph cluster_hlr { |
| 46 | label = "OsmoHLR"; |
| 47 | GSUP [label="GSUP server"] |
| 48 | DB [label="SQLite DB"] |
| 49 | GSUP->DB |
| 50 | DB->CTRL [dir="back"] |
| 51 | DB->VTY [dir="back"] |
| 52 | } |
| 53 | |
| 54 | Admin [label="Admin and\nMaintenance"] |
| 55 | SW [label="3rd party software\nintegration"] |
| 56 | VTY->Admin [dir="back"] |
| 57 | CTRL->SW [dir="back"] |
| 58 | |
| 59 | MSC [label="MSC/VLR"] |
| 60 | MSC->GSUP [label="GSUP"] |
| 61 | SGSN->GSUP [label="GSUP"] |
| 62 | |
| 63 | BSC->MSC |
| 64 | HNBGW->MSC |
| 65 | HNBGW->SGSN |
| 66 | PCU->SGSN |
| 67 | } |
| 68 | ---- |
| 69 | |