commit | 022f9e56e59327d4be7a415d5f624be2599634a0 | [log] [tgz] |
---|---|---|
author | Pau Espin Pedrol <pespin@sysmocom.de> | Mon Nov 16 18:49:39 2020 +0100 |
committer | laforge <laforge@osmocom.org> | Tue Dec 01 11:56:01 2020 +0000 |
tree | 36e51d0d0d49f30c6fc9479332965a6c1a586beb | |
parent | 7fd9a29eba9b87ac41aef0118de66eca00973f70 [diff] |
Implement downgrade to DL MCS1-4 when USF for GPRS_only MS In previous status, if USF for GPRS-only MS was selected, then EGPRS TBFs were skipped and either a GPRS TBF was selected or a Dummy Block was sent. That means the behavior was unfair towards EGPRS TBFs, because sometimes they were skipped in favor of GPRS ones. This patch imporves the situation in the above mentioned USF scenario, by first, under specific conditions, allowing selection of an EGPRS TBF and then forcing it to transmit in EGPRS-GMSK (MCS1-4) so that the USF-targeted MS can still decode the USF, while at the same time providing more fairness by allowing the EGPRS TBF to transmit data. The specific conditions mentioned above are, mainly, related to the fact that once a DL data block has been sent, and hence a BSN was assigned to it, it cannot be retransmitted later using another MCS, since lower MCS1-4 wouldn't be able to contain higher MCS RLC payload. The set of conditions could be expanded in the future by also selecting the EGPRS TBF if retransmition is required and the block to be retransmitted was originally transmitted as MCS1-4. Related: OS#4544 Change-Id: I9af23e175435fe9ae7b0e4119ad52fcd4707b9ca
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