Parameter Name |
T3168 |
|---|---|
Description |
This parameter specifies the timer set for the MS to wait for the Packet Uplink Assignment message. This parameter specifies the maximum interval set for the MS to wait for the Packet Uplink Assignment message. After the MS sends the Packet Resource Request or Packet Downlink Ack/Nack message carrying Channel Request Description, T3168 is started to wait for the Packet Uplink Assignment message from the network. If the MS receives the Packet Uplink Assignment message before T3168 expires, T3168 is reset. Otherwise, the MS initiates the PS access procedure again for four times. If the Packet Uplink Assignment message is still not received, the MS regards that this uplink TBF establishment has failed. |
GUI Value Range |
[500,1000,1500,2000,2500,3000,3500,4000] |
Default Value |
500 |
Unit |
Milliseconds |
Step |
- |
Modification Rules |
None |
Configuration Policy |
If the timer is set to a lower value, the MS can detect the TBF establishment failure within a shorter period. If the TBF establishment fails, the average delay of packet access is short, but the success rate of TBF establishment in bad radio environment decreases. In addition, the small timer value increases the probability of the retransmission of the packet access request, thus increasing the probability of reassignment by the PCU and wasting system resources. If the timer is set to a higher value, the MS takes a longer period to detect the TBF establishment failure. If the TBF establishment fails, the average delay of packet access is long, but the success rate of TBF establishment in bad radio environment increases. |
Recommended Value |
500 |
Parameter Relationship |
None |
BSC Feature |
GPRS&EGPRS |
Parameter Class |
Parameters About Radio Resources |
Caution |
None |