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 |