LTE ERAB Drop call reason Abnormal Release of Radio due to UL Sync Failure

4G LTE
, ,
1

Hi Experts,

I am getting failure due to L.E-RAB.AbnormRel.Radio.ULSyncFail in Drop Call Rate.
Vendor is Huawei.
Please share the ways to improve the DCR.

Thanks

1 Like
2

In Order to decrease CDR & L.E-RAB.AbnormRel.Radio.ULSyncFail and Enhances the uplink timing reliability and reduces the out-of-synchronization probabilities.

Command:

MOD TATIMER:LocalCellId=X, TimeAlignmentTimer=INFINITY, TimingAdvCmdOptSwitch=ON.

1 Like
3

Hi
Yes agreed with Cheikh789,
Add one more thing,
GLOBALPROCSWITCH:UELINKABNORMALDETECTSWITCH=OFF; (Turn on to off)

1 Like
4

Hi,
This parameter is already aligned with the mentioned.

Please suggest any other parameters.

5

You can adjust the parameter using MML command “MOD RLCPDCPPARAGROUP”
enodeBPollRetransmitTimer=Tpollretrans_m200;
UEPollRetransmitTimer=Tpollretrans_m200;
Recommended to tune same value for both, in order to have same gain for uplink and downlink sides.

1 Like
6

check if there is interference or whether operations or modifications are performed

7

@Prakash , did you resolve these uplink sync issues?