sched: Modify DL scheduling to use different priorities
Currently the DL blocks are scheduled round robin to each TBF that is
either in state FLOW or FINISHED and not waiting for an IMM.ASS
confirmation. This way, if single blocks has been NACK'ed by the MS
and the PCU has already resent the missing packets, the PCU starts
retransmitting them until it has received an ACK/NACK even if other
TBF have RLC blocks that need to be transmitted.
This commit changes sched_select_downlink to select the next TBF with
the highest priority, where blocks that are going to be resent again
have a lower priority unless the window is stalling. If there is only
one TBF the old behaviour is kept, since there is no other TBF that
can have a higher priority.
If there is much packet loss on a single phone, this modification can
lead to a higher latency for that MS.
Sponsored-by: On-Waves ehf
1 file changed