WCDMA Congestion Control and Its Parameter

What is Congestion Control?

Congestion Control monitors the dynamic utilization of specific cell resources and insures that overload conditions do not occur.  If overload conditions do occur, Congestion Control will immediately restrict Admission Control from granting additional resources.  In addition, Congestion Control will attempt to resolve the congestion by either down switching, or terminating existing users.  Once the congestion is corrected, the congestion resolution actions will cease, and Admission Control will be enabled.

Parameter of congestion control:

PwrAdm:

 Admission limit for admission on DL cell carrier power.

PwrAdmOffset:

Relative admission limit on DL cell carrier power.

PwrOffset:

 Used by Congestion Control.

PwrHyst:

 Hysteresis time setting for detection of congestion in the DL transmitted carrier power.

iFCong:

Threshold at which UL congestion is detected in the cell.

iFOffset:

Offset that, together with parameter iFCong, determinesthe RTWP measurement level at which UL congestionis to be resolved.

iFHyst:

Hysteresis time setting for detection of congestion in theUL RTWP in a cell.