2 MS tests: Issue with TS allocation for DL in PCU
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.
#2 Updated by arvind.sirsikar about 4 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.
- Status changed from Stalled to New
There's a test case in AllocTest showcasing this issue in function test_2_consecutive_dl_tbfs().
So once fixed the following assert should pass when checked against == 4:
OSMO_ASSERT(numTs2 == 3);
See osmo-pcu.git commit e26ee01d56b4c4c2da6abc6b649cb765d5787b98 for more information.