ZTE: Number of E-RAB Release by ENB Through E-RAB Release Procedure due to Redirection

4G LTE
, ,
1

What is the meaning this kpi (Number of E-RAB Release by UL HARQ FAIL) on zte.
What parameters can reduce ?

2

UE in weaker coverage may require an increased number of re-transmissions.
check value of harqMaxTxNumEMTC

3

yeah. i noticed the failures were directly proportional to Number of E-RAB Release due to RLF triggered by Poor Uu Quality.

4

@cheikh789 , does ZTE have a timer associated with waiting for these transmissions.

5

For RLF,check below
t310_Ue
t311_Ue
n310
n311
maxRetxThrd

Also improve HO (to be fast)
thresholdOfRSRP A2
A3offset

6

What are the ranges for this values. The ZTE LTE TDD parameter document on scribd is missing descriptions.

7

maxRetxThrd doesn’t exist on ZTE

8

check in RLCPara :MO

9

below parameter

Parameter Range
t310_Ue 0[0],50[1],100[2],200[3],500[4],1000[5],2000[6]
t311_Ue 1000[0],3000[1],5000[2],10000[3],15000[4],20000[5],30000[6]
n310 1[0],2[1],3[2],4[3],6[4],8[5],10[6],20[7]
n311 1[0],2[1],3[2],4[3],5[4],6[5],8[6],10[7]
maxRetxThrd 1[0],2[1],3[2],4[3],6[4],8[5],16[6],32[7]
a3Offset [-15…15],step=0.5
thresholdOfRSRP [-140…-43]
10

image
m not finding MO relating to RLC. maybe it hidden in TDD system.