Prior to this patch, ACC ramping was only used to go 0->N in the
number of allowed ACCs during BTS startup. It could optionally
dynamically stretch or extend the ramping time based on channel load.
With this patch, ACC ramping is kept alive during the entire time the
BTS is active, and subset of allowed ACCs can now be incresed or
decreased based on channel load. A new VTY command
"access-control-class-ramping-chan-load" is added to configure a lower
and an upper threshold. Channel load under the low threshold will
potentially trigger an increment of the subset size of allowed ACCs,
while a channel load over the upper threshold will potentially trigger
the opposite (a decrease in size).
The time between checks is kept fixed per VTY command (reusing old
"access-control-class-ramping-step-size"), but the "dynamic" option
is deprecated and ignored from now on since it provides nothing valuable
in the new implementation, because the size always dynamically changes
based on channel load (configured thresholds).
Related: SYS#4912
Change-Id: Id17f947c92cdfc0eb9541a9bf066338169caaeb5
Pau Espin
1e5e7004dc