Osmocom Packet control Unit (PCU): Network-side GPRS (RLC/MAC); BTS- or BSC-colocated https://osmocom.org/projects/osmopcu
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Neels Hofmeyr f75381498c mslot_class: two more: use uint32_t to shift 1 << 31
Avoid runtime error seen on jenkins admin-deb9build slave, when building
osmo-pcu with_dsp=None,with_vty=False, during ts_alloc and tbf regression

+../../../src/mslot_class.c:271:36: runtime error: left shift of 1 by 31 places cannot be represented in type 'int'
+../../../src/mslot_class.c:272:22: runtime error: left shift of 1 by 31 places cannot be represented in type 'int'

This time it seems that these are all.

The master-osmo-pcu breaks on this since moving to a debian9 build slave.

Change-Id: I976a1dca9da19a05afc85a17b7ba60545b7bc1e5
2018-03-28 14:44:47 +02:00
contrib jenkins.sh: Disable building doxygen for deps 2018-01-17 15:56:57 +00:00
debian Tag/Release Version 0.4.0 2017-10-29 12:10:13 +01:00
examples Revert "pcu: Improve default config" 2015-11-30 12:11:48 +01:00
include implement support for 3-digit MNC with leading zeros 2018-03-11 00:47:14 +01:00
src mslot_class: two more: use uint32_t to shift 1 << 31 2018-03-28 14:44:47 +02:00
tests implement support for 3-digit MNC with leading zeros 2018-03-11 00:47:14 +01:00
.gitignore Ignore test binaries using mask 2017-07-10 10:49:02 +02:00
.gitreview add .gitreview 2016-05-19 06:39:45 +00:00
COPYING import GPLv2 license text to this project 2012-07-22 22:05:44 +02:00
Makefile.am Facilitate future releases 2017-08-24 13:53:25 +02:00
README.md README: Clarify that fixed allocations have been revmoved from 3GPP specs 2017-07-29 22:15:02 +02:00
TODO TODO: Update the todolist with some musings... 2014-01-16 10:11:57 +01:00
configure.ac configure: add --enable-werror 2018-03-13 00:03:38 +00:00
git-version-gen Add auto-foo (partial cleanup, master makefile/configure.ac 2012-06-14 21:05:44 +08:00
osmo-pcu.pc.in Add pkg-config file 2017-03-09 12:17:35 +01:00
osmoappdesc.py Added conditional python-based tests for VTY/config handling 2013-04-06 11:00:20 +02:00


osmo-pcu - Osmocom Packet Control Unit

This repository contains a C/C++-language implementation of a GPRS Packet Control Unit, as specified by ETSI/3GPP. It is part of the Osmocom Open Source Mobile Communications project.

The Packet Control Unit is terminating the Layer 2 (RLC/MAC) of the GPRS radio interface and adapting it to the Gb Interface (BSSGP+NS Protocol) towards the SGSN.

The PCU interfaces with the physical layer of the radio interface. OsmoPCU is typically used co-located with the BTS, specifically OsmoBTS. For legacy BTSs that run proprietary sotware without an interface to OsmoPCU, you may also co-locate it with the BSC, specifically OsmoBSC


The official homepage of the project is https://osmocom.org/projects/osmopcu/wiki/OsmoPCU

GIT Repository

You can clone from the official osmo-pcu.git repository using

git clone git://git.osmocom.org/osmo-pcu.git

There is a cgit interface at http://git.osmocom.org/osmo-pcu/


We provide a user manual as well as a vty reference manual

Please note that a lot of the PCU configuration actually happens inside the BSC, which passes this configuration via A-bis OML to the BTS, which then in turn passes it via the PCU socket into OsmoPCU.

Mailing List

Discussions related to osmo-pcu are happening on the osmocom-net-gprs@lists.osmocom.org mailing list, please see https://lists.osmocom.org/mailman/listinfo/osmocom-net-gprs for subscription options and the list archive.

Please observe the Osmocom Mailing List Rules when posting.


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 osmo-pcu can be seen at https://gerrit.osmocom.org/#/q/project:osmo-pcu+status:open

Current limitations

  • No PFC support
  • No fixed allocation support (was removed from 3GPP Rel >= 5 anyway)
  • No extended dynamic allocation support
  • No unacknowledged mode operation
  • Only single slot assignment on uplink direction
  • No half-duplex class support (only semi-duplex)
  • No TA loop
  • No power loop