OpenBSC » History » Version 12
laforge, 02/19/2016 10:47 PM
| 1 | 1 | laforge | '''OpenBSC''' is the current name for a software program that started with the name bs11-abis. |
|---|---|---|---|
| 2 | |||
| 3 | == What is OpenBSC == |
||
| 4 | 2 | laforge | It is a [wiki:BSC] (Base Station Controller) side implementation of the A-bis protocol, as implemented in the GSM Technical Specification 08.5x and 12.21. It implements a minimal subset of the [wiki:BSC], [wiki:MSC] and [wiki:HLR]. It does not implement ant of the interfaces (like the A and B interfaces) between the higher-order GSM network components. |
| 5 | 1 | laforge | |
| 6 | The goal of the project is to |
||
| 7 | * provide a basis for experimentation and security research with GSM from the network side |
||
| 8 | * document, publicized and point out any security related issues that we find as part of that |
||
| 9 | * learn more about GSM networks on a lower level, particularly the practical aspects with real-world equipment |
||
| 10 | |||
| 11 | We '''are not interested''' in |
||
| 12 | * building a stable/reliable BSC/MSC for deployment in actual networks |
||
| 13 | * building something that follows the GSM spec to the last detail |
||
| 14 | * disrupting actual commercial GSM network |
||
| 15 | |||
| 16 | == Requirements == |
||
| 17 | |||
| 18 | 2 | laforge | OpenBSC runs only on Linux systems and requires a [wiki:E1] interface card compatible with [wiki:mISDN] |
| 19 | 1 | laforge | |
| 20 | 9 | laforge | It requires a GSM [wiki:BTS]. The only currently tested configurations are with a Siemens [wiki:BS11 BS-11] microBTS or a [wiki:nanoBTS ip.access nanoBTS]. |
| 21 | 1 | laforge | |
| 22 | == Source code == |
||
| 23 | |||
| 24 | 12 | laforge | === Releases === |
| 25 | FIXME |
||
| 26 | |||
| 27 | === Development Version === |
||
| 28 | 1 | laforge | You can check out the source code via |
| 29 | {{{ |
||
| 30 | 10 | laforge | git clone git://bs11-abis.gnumonks.org/openbsc.git |
| 31 | 1 | laforge | }}} |
| 32 | or browse it at http://bs11-abis.gnumonks.org/trac/browser |
||
| 33 | |||
| 34 | 3 | laforge | == Mailing list == |
| 35 | |||
| 36 | There's a developer mailing list called openbsc@lists.gnumonks.org |
||
| 37 | Subscription is available at [http://lists.gnumonks.org/mailman/listinfo/openbsc/] |
||
| 38 | |||
| 39 | 8 | laforge | == IRC (Internet Relay Chat) == |
| 40 | |||
| 41 | irc.freenode.net/#openbsc |
||
| 42 | |||
| 43 | 2 | laforge | == Project status == |
| 44 | |||
| 45 | === Things that work === |
||
| 46 | * [wiki:OML] Initialization of the BTS |
||
| 47 | * [wiki:RSL] bringup, channel allocation, Channel required / Immediate Assign |
||
| 48 | * Very simplistic [wiki:HLR] implemented as sqlite database |
||
| 49 | * Non-secure Authentication using [wiki:IMEI]/[wiki:IMSI] and regular SIM cards. |
||
| 50 | * [wiki:IMEI]/[wiki:IMSI] skimming of all phones that try to register with OpenBSC |
||
| 51 | * [wiki:SMS] reception and [wiki:SMS] sending (simplistic, not possible to route them yet) |
||
| 52 | * Transmission of MM INFO packets with operator name and local time / timezone |
||
| 53 | 5 | laforge | * Extremely simplistic call control for MO (Mobile Originated) and MT (Mobile Terminated) calls |
| 54 | 4 | laforge | * TCH/F support |
| 55 | 5 | laforge | * paging of mobiles that are registered to the BTS |
| 56 | 1 | laforge | * signalling of mobile-originated and mobile-terminated calls |
| 57 | 6 | laforge | * processing/switching of calls from one phone to another |
| 58 | * demultiplex of the four 16k sub-channels with voice data contained in one [wiki:E1] timeslot |
||
| 59 | 11 | laforge | * support for multiple [wiki:TRX] in one [wiki:BTS] |
| 60 | 1 | laforge | |
| 61 | === Things that are implemented but don't work yet or aren't tested yet === |
||
| 62 | 11 | laforge | * GPRS support (SGSN + GGSN inside OpenBSC) |
| 63 | * Support the use of A3/A8 and A5/1 (we need SIM cards with known Ki, e.g. simulated SIM cards) |
||
| 64 | 2 | laforge | |
| 65 | 7 | laforge | === Things being worked at === |
| 66 | * GPS/DCF77 disciplined quartz reference for the HFC-E1 card (via HS-Esslingen, Student Research Project) |
||
| 67 | |||
| 68 | 2 | laforge | === Things that are missing === |
| 69 | 1 | laforge | * Cell Broadcast |
| 70 | 2 | laforge | * transcoding of voice data |
| 71 | 11 | laforge | * TCH/H voice calls (in standalone config) |
| 72 | 1 | laforge | * [wiki:CSD] calls |
| 73 | 2 | laforge | * handover between multiple [wiki:BTS] |
| 74 | * emergency call handling |
||
| 75 | 4 | laforge | * Discontinuous TX and RX ([wiki:DTX] / [wiki:DRX]) support |
| 76 | 2 | laforge | |
| 77 | 1 | laforge | == Authors == |
| 78 | |||
| 79 | 9 | laforge | OpenBSC was mainly developed by [http://laforge.gnumonks.org/ Harald Welte]. Contributions by Holger Freyther, Stefan Schmidt, Daniel Willmann, Jan Luebbe, Thomas Seiler and Andreas Eversberg. |
| 80 | 1 | laforge | |
| 81 | 11 | laforge | Special thanks to Dieter Spaar for [wiki:BS11-Init] and tons of feedback and comments, without which we would not have been able to make progress as quickly as we did. |
