Bug #1792: 2 MS tests: Issue with TS allocation for DL in PCU - OsmoPCU - Open Source Mobile Communications

Bug #1792

2 MS tests: Issue with TS allocation for DL in PCU

Added by arvind.sirsikar over 3 years ago. Updated over 2 years ago.

Status:

Stalled

Priority:

High

Assignee:

sysmocom

Target version:

Start date:

08/09/2016

Due date:

% Done:

Spec Reference:

Description

Hi All,

When 4 TS is configured for DL and testing 2 MSs it was found that 1st MS gets 4 TS where as next MS gets 3 TS. causing issue with DL traffic fairness between MSs.

issue is traced to "static int find_multi_slots" function which considers both UL/DL capacity for TS calculation causing 2 TS allocation for UL and 3 for DL.

as of now

if (capacity <= max_capacity) condition in same function is modified to

if (rx_window < max_dl_slots) to concentrate only on DL.

Thanks,
Aravind Sirsikar

History

#1 Updated by arvind.sirsikar about 3 years ago

Status changed from New to Stalled

waiting for review feed back on Gerrit for

https://gerrit.osmocom.org/#/c/819/

#2 Updated by arvind.sirsikar almost 3 years ago

Current PCU implementation aims at supporting "many MSs with lesser resources"compared to "giving all the resources to fewer MSs".

The patch https://gerrit.osmocom.org/#/c/819/ tries to give same(rather max)resources to all the MSs. However it is applicable only for lab testing.

Moving this patch to abandoned state as of now. This patch can be merged if necessary for lab testing.

#3 Updated by zecke almost 3 years ago

What would it take to scale this? We should not have a flag that makes it look good in a lab with a a handful of phones while in practice we run into resource conflicts too early.