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Osmocom Packet control Unit (PCU): Network-side GPRS (RLC/MAC); BTS- or BSC-colocated https://osmocom.org/projects/osmopcu
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Max b3a17d6074 cosmetic: clarify coding scheme and puncturing 
* use appropriate types for coding scheme parameters
* add comment regarding possible number of RLCMAC blocks

The code in create_dl_acked_block() has underlying assumption that
rlc.num_data_blocks can never be more than 2, which is true and is
enforced by appropriate asserts but is not obvious when looking at the
function code alone. It's equally hard for Coverity which leads to false
positives in scan.

Lets' make this assumption explicit by putting it into for(;;) condition
alongside with corresponding comment.

Fixes: CID143070
Change-Id: If599a6c8a6ef56d847604fcf41bb71decccd8a78
 		2018-01-04 16:35:55 +00:00
contrib Enable sanitize for CI test 2017-12-21 17:34:19 +01:00
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 Add pcu-socket vty config 2017-08-09 12:17:39 +02:00
src cosmetic: clarify coding scheme and puncturing 2018-01-04 16:35:55 +00:00
tests window: move encoding into functions 2018-01-04 10:15:59 +00:00
.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 Add optional profiling support 2017-12-28 14:18:02 +01:00
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

README.md

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

Homepage

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/

Documentation

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.

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 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