Busy Threshold of TCH Traffic in Underlaid Subcell

Parameter Name

Busy Threshold of TCH Traffic in Underlaid Subcell

Description

The BSC assigns channels in the overlaid subcell to the MS in a concentric cell. If the channel seizure ratio of overlaid subcell is greater than the value of this parameter, half-rate channels are assigned. Otherwise, full-rate channels are assigned.

Channel seizure ratio = (Num. of busy TCHF + Num. of busy TCHH/2)/ (Num. of available TCHF + Num. of available TCHH /2) x 100%. This parameter is valid for the concentric cell. When the Allow Rate Selection Based on Overlaid/Underlaid Subcell Load is set to Yes, the TCH Traffic Busy Threshold (%) is invalid for the concentric cell.

GUI Value Range

[0,100]

Default Value

60

Unit

%

Step

-

Modification Rules

None

Configuration Policy

If this parameter is set to a higher value, the half-rate channels are assigned to the MS only when the channel seizure ratio of overlaid subcell is very high. Insufficient half-rate channels can be assigned to the MS. Thus, the capacity of the BSC is reduced.

If this parameter is set to a lower value, the half-rate channels are assigned to the MS only when the channel seizure ratio of overlaid subcell is very low. The calls use the half-rate channel even if there are enough full-rate channels, which influences the speech quality.

Recommended Value

60

Parameter Relationship

None

BSC Feature

Channel Management, Half-Rate Service

Parameter Class

Parameters About Radio Resources

Caution

None


Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.