| commit | 44768f21273cf56919850ed8c3197b174bce65ef | [log] [tgz] |
|---|---|---|
| author | Pau Espin Pedrol <pespin@espeweb.net> | Tue Feb 02 13:11:30 2021 +0100 |
| committer | laforge <laforge@osmocom.org> | Wed Feb 03 08:34:12 2021 +0000 |
| tree | 6f94699e84f2006df2af8a27a1acffb5b8fef589 | |
| parent | 952cb3d5d7e07c3e22aac080a3d3ddc7925093c3 [diff] |
nacc: Avoid RIM procedures targeting cells under same PCU Now that we have the required System Information in osmo-pcu to craft the Packet Neigbour Cell Change packet for cells it controls, let's avoid starting a RIM procedure to gather the SI info, since the SGSN would end up routing the RIM request back at us and we'd answer back to ourselves. This same optimization cannot be done on the first step (CTRL Neighbor Resolution against BSC), because the PCU cannot know if the target ARFCN+BSIC requested by the MS is actually managed by a cell under the PCU or it's another cell managed by another external PCU, because ARFCN+BSIC keys can be resued among non-neighbor cells. Hence, it shall always ask the BSC since only it holds the information about neighboring cells. Related: OS#4909 Change-Id: I928875b6b66dff55fc12f51b6b1ad919fef7d03b
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
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.
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