Parameter Name |
Radio Link Timeout(SACCH period (480ms)) |
|---|---|
Description |
This parameter specifies when an MS disconnects a call if the MS unsuccessfully decodes the SACCH message. For details of this parameter, see GSM Rec. 0408 and 05.08. Once a dedicated channel is assigned to the MS, the counter S is enabled and the initial value is set to this parameter value. Each time an SACCH message is not decoded, the counter S decreases by 1. Each time an SACCH message is correctly decoded, the counter S increases by 2.When the counter S is equal to 0, the downlink radio link is considered as failed.Therefore, when the voice or data quality is degraded to an unacceptable situation and it cannot be improved through power control or channel handover, the connection is to be re-established or released. |
GUI Value Range |
[4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64] |
Default Value |
52 |
Unit |
SACCH period (480ms) |
Step |
- |
Modification Rules |
None |
Configuration Policy |
If this parameter is set to a small value, radio links are likely to be faulty and therefore call drops occur. If this parameter is set to a great value, a long time lasts before an MS disconnects a call, and therefore resource usage is low. This parameter takes effect on the downlink. |
Recommended Value |
In the areas where the traffic volume is low, such as rural areas, this parameter should range from 52 to 64. |
Parameter Relationship |
None |
BSC Feature |
None |
Parameter Class |
Parameters About Radio Resources |
Caution |
None |