Pau Espin
b5551eec33
Those are available in 3GPP TS 48.008 version 16.0.0 Release 16, section
3.2.2.17 Cell Identifier. It can be seen that we have a collision
between the osmocom non-standard format and the SAI standard one.
This is because CGI-PS is not really a TS 48.008 Cell Identifier, but only
specified in TS 48.018 and has no ID number assigned. The CGI-PS was
added there because the whole osmo-bsc neighbour configuration works
with CellIds to manage neighbours, so it felt natural to extend the APIs
to also provide means to use CGI-PS format (TS 48.018 even refers 48.008
existance and mentions there's no explicit ID).
At the time this Cell Identifier was added, the firstly available number
(11) was taken, which was of course a really bad idea since newer
versions of the spec can at some point use it, which is the case if one
checks for instance TS 48.008 Release 16 SAI Cell Id.
There no perfect way to fix this bad decision at the time, but the
CGI-PS is only used in osmo-bsc and only for RIM related purposes, so by
changing the ID of CELL_IDENT_WHOLE_GLOBAL_PS, we only break RIM under
some specific CIs being used, and when an osmo-bsc is built against
older libosmocore and then used at runtime against a newer libosmocore
(which should be rare).
Hence, the downside is acceptable, and by moving the new ID number to be
ouside of the spec proto TS 48.008 range (4 bits), we make sure we don't
have the same problem again in the future.
Related: SYS#5838
Fixes:
|
||
|---|---|---|
| contrib | ||
| debian | ||
| doc | ||
| include | ||
| m4 | ||
| src | ||
| tapset | ||
| tests | ||
| utils | ||
| .gitignore | ||
| .gitreview | ||
| .mailmap | ||
| COPYING | ||
| Doxyfile.codec.in | ||
| Doxyfile.coding.in | ||
| Doxyfile.core.in | ||
| Doxyfile.ctrl.in | ||
| Doxyfile.gb.in | ||
| Doxyfile.gsm.in | ||
| Doxyfile.vty.in | ||
| Makefile.am | ||
| README.md | ||
| TODO-RELEASE | ||
| configure.ac | ||
| git-version-gen | ||
| libosmocodec.pc.in | ||
| libosmocoding.pc.in | ||
| libosmocore.pc.in | ||
| libosmoctrl.pc.in | ||
| libosmogb.pc.in | ||
| libosmogsm.pc.in | ||
| libosmosim.pc.in | ||
| libosmousb.pc.in | ||
| libosmovty.pc.in | ||
| osmo-release.mk | ||
| osmo-release.sh | ||
README.md
libosmocore - set of Osmocom core libraries
This repository contains a set of C-language libraries that form the core infrastructure of many Osmocom Open Source Mobile Communications projects.
Historically, a lot of this code was developed as part of the OpenBSC project, but which are of a more generic nature and thus useful to (at least) other programs that we develop in the sphere of Free Software / Open Source mobile communications.
There is no clear scope of it. We simply move all shared code between the various Osmocom projects in this library to avoid code duplication.
The libosmocore.git repository build multiple libraries:
- libosmocore contains some general-purpose functions like select-loop abstraction, message buffers, timers, linked lists
- libosmovty contains routines related to the interactive command-line interface called VTY
- libosmogsm contains definitions and helper code related to GSM protocols
- libosmoctrl contains a shared implementation of the Osmocom control interface
- libosmogb contains an implementation of the Gb interface with its NS/BSSGP protocols
- libosmocodec contains an implementation of GSM voice codecs
- libosmocoding contains an implementation of GSM channel coding
- libosmosim contains infrastructure to interface SIM/UICC/USIM cards
Homepage
The official homepage of the project is https://osmocom.org/projects/libosmocore/wiki/Libosmocore
GIT Repository
You can clone from the official libosmocore.git repository using
git clone git://git.osmocom.org/libosmocore.git
There is a cgit interface at https://git.osmocom.org/libosmocore/
Documentation
Doxygen-generated API documentation is generated during the build process, but also available online for each of the sub-libraries at https://ftp.osmocom.org/api/latest/libosmocore/
Mailing List
Discussions related to libosmocore are happening on the openbsc@lists.osmocom.org mailing list, please see https://lists.osmocom.org/mailman/listinfo/openbsc for subscription options and the list archive.
Please observe the Osmocom Mailing List Rules when posting.
Contributing
Our coding standards are described at https://osmocom.org/projects/cellular-infrastructure/wiki/Coding_standards
We us a gerrit based patch submission/review process for managing contributions. Please see https://osmocom.org/projects/cellular-infrastructure/wiki/Gerrit for more details
The current patch queue for libosmocore can be seen at https://gerrit.osmocom.org/#/q/project:libosmocore+status:open