Project

General

Profile

Wiki » History » Version 20

laforge, 03/05/2018 03:34 PM
add binary package link; remove status to non-existant README file

1 10 laforge
h1. [[OsmoBTS]]
2 4 ipse
3
4 15 laforge
[[OsmoBTS]] is a software implementation of a GSM BTS(Base Transceiver Station). 
5
6
It implements the follwing protocols/interfaces:
7 10 laforge
* LAPDm (GSM 04.06)
8
* RTP
9
* A-bis/IP in IPA multiplex
10
* OML (GSM TS 12.21)
11
* RSL (GSM TS 08.58)
12 1 laforge
13 14 laforge
[[OsmoBTS]] is building up on work done previosuly for [[OpenBSC:]] (e.g. RSL, OML, RTP) and [[OsmocomBB:]] (e.g. LAPDm).  The Abis/IP protocol staking is inspired by ip.access A-bis/IP, sometimes called IPA multiplex.
14 1 laforge
15 11 laforge
h2. OsmoBTS in the Osmocom architecture
16
17 19 laforge
h3. OsmoBTS in a GSM + GPRS/EDGE network using [[OsmoNITB:]]
18
19 11 laforge
{{graphviz_link()
20
digraph G {
21
    rankdir = LR;
22
    OsmoTRX -> OsmoBTS [label="bursts over UDP"];
23
    sysmoPHY -> OsmoBTS [label="/dev/msgq/"];
24
    octPHY -> OsmoBTS [label="Raw Ethernet"];
25
    OsmoBTS -> OsmoNITB [label="Abis/IP"];
26
    OsmoBTS -> OsmoPCU [label="pcu_sock"];
27
    OsmoPCU -> OsmoSGSN [label="Gb/IP"];
28 19 laforge
    OsmoBTS [color=red];
29
}
30
}}
31
32
h3. OsmoBTS in a GSM + GPRS/EDGE network using [[OsmoBSC:]] and [[OsmoMSC:]]
33
34
{{graphviz_link()
35
digraph G {
36
    rankdir = LR;
37
    OsmoTRX -> OsmoBTS [label="bursts over UDP"];
38
    sysmoPHY -> OsmoBTS [label="/dev/msgq/"];
39
    octPHY -> OsmoBTS [label="Raw Ethernet"];
40
    OsmoBTS -> OsmoBSC [label="Abis/IP"];
41
    OsmoBSC -> OsmoMSC [label="3GPP AoIP"];
42
    OsmoMSC -> OsmoHLR [label="GSUP"];
43
    OsmoBTS -> OsmoPCU [label="pcu_sock"];
44
    OsmoPCU -> OsmoSGSN [label="Gb/IP"];
45
    OsmoSGSN -> OsmoGGSN [label="Gp"];
46 11 laforge
    OsmoBTS [color=red];
47
}
48
}}
49 1 laforge
50 10 laforge
h2. Backends / Hardware support
51 9 laforge
52 10 laforge
53
[[OsmoBTS]] is modular and has support for multiple back-ends.  A back-end talks to a specific L1/PHY implementation of the respective BTS hardware. Based on this architecture, it should be relatively easy to add a new back-end to support so-far unsupported GSM PHY/L1 and associated hardware.
54
55
So far [[OsmoBTS]] has been integrated with several different L1/PHY and hardware systems. The backends are:
56
* osmo-bts-sysmo
57 13 laforge
** Multiple indoor and outdoor BTS products  called "sysmoBTS":http://www.sysmocom.de/products/sysmobts by "sysmocom":http://sysmocom.de/
58 1 laforge
* osmo-bts-trx
59 13 laforge
** Wideband SDR transceiver hardware supported by [[OpenBTS]] transceiver or [OsmoTRX] PHY layer software, including the [[umtrx:UmTRX]], the USRP family, etc.
60
** Multiple indoor and outdoor "fairwaves":https://fairwaves.co BTSs, like [[umtrx:UmDESK]] and [[umtrx:UmSITE]]
61
* osmo-bts-litecell15
62
* osmo-bts-octphy
63 10 laforge
* osmo-bts-bb
64
** A pretty crazy experimental BTS hardware based on two [[OsmocomBB]] phones had originally been supported, but needs to be re-integrated with core code changes.
65
66 17 laforge
{{graphviz_link()
67
graph G {
68
  OsmoBTS [color=red];
69
  sysmoBTS [label="sysmocom sysmoBTS\n(many models)", shape=box];
70
  LC15 [label="Nuran\nLitecell 1.5", shape=box];
71
  OCT [label="Octasic\nOCTBTS", shape=box];
72
  TRX [label="OsmoTRX"];
73
  OtherSDR [label="Other SDR HW", shape=box, style=dashed];
74
  OtherPHY [label="Other GSM PHY", shape=box, style=dashed];
75
  UmTRX [label="Fairwaves\nUmTRX", shape=box];
76
  USRP [label="Ettus USRP\nFamily", shape=box];
77
78
  OsmoBTS -- sysmoBTS [label="osmo-bts-sysmo"];
79
  OsmoBTS -- LC15 [label="osmo-bts-lc15"];
80
  OsmoBTS -- OCT [label="osmo-bts-octphy"];
81
  OsmoBTS -- TRX [label="osmo-bts-trx"];
82
  OsmoBTS -- OtherPHY [style=dashed];
83
84
  TRX -- USRP;
85
  TRX -- UmTRX;
86
  TRX -- OtherSDR [style=dashed];
87
88 18 laforge
  { rank=same; sysmoBTS LC15 OCT UmTRX }
89 17 laforge
}
90
}}
91
92 20 laforge
{{include(cellular-infrastructure:MacroBinaryPackages)}}
93
94 16 laforge
h2. Manuals
95 1 laforge
96 16 laforge
* User Manual: http://ftp.osmocom.org/docs/latest/osmobts-usermanual.pdf
97 10 laforge
* VTY Reference: http://ftp.osmocom.org/docs/latest/osmobsc-vty-reference.pdf
98 9 laforge
* Abis Protocol Manual: http://ftp.osmocom.org/docs/latest/osmobts-abis.pdf
99
100 1 laforge
h2. GPRS support
101 10 laforge
102 12 laforge
In the GSM architecture, the BTS is an element in the circuit-switched domain only.
103 1 laforge
104 12 laforge
For packet-switched support, OsmoBTS provides  a socket interface towards [[OsmoPCU:]]. This adds GPRS and EDGE support to it.
105 10 laforge
106
h2. Source code
107
108
109 1 laforge
The source code is available from git.osmocom.org (module osmo-bts).
110 6 ipse
111
Public read-only access is available via
112
 git clone git://git.osmocom.org/osmo-bts.git
113
You can browse it via cgit: http://cgit.osmocom.org/cgit/osmo-bts/
114
115
116 10 laforge
h2. Authors / Credits
117 1 laforge
118 10 laforge
119
[[OsmoBTS]] was originally developed in 2011 by Andreas Eversberg and Harald Welte.  
120 9 laforge
121 12 laforge
Today it is mostly maintained by Harald Welte and Holger Freyther at sysmocom.  Exception is the osmo-bts-trx back-end which is maintained by Fairwaves.
Add picture from clipboard (Maximum size: 48.8 MB)