IFLB feature in 4G

4G LTE
,
1

Hello Dears,
Have anyone worked with IFLB feature in 4G?
Do you have any idea what kpis are effected?
Advantages and disadvantages?

2

This is the basic load balancing feature.
Will help you balance the load between different LTE layers and will help achieve better spectral efficiency.

3

It’s good feature for Traffic Shifting.
But be careful for Drop Call.

4

In Huawei it is named MLB, preferred based on UE number.

5

Hello

I have LTE site with two carriers L1800 and L2100, but with no IFLB HO Att between co-site cells .

Although the IFLB feature is activated with all recommanded values and with no missing neighbor, that cause a high congestion in 1800 carrier.

Vendor is Ericsson.

I already checked the parameter (loadbalancing, a5Threshold1Rsrp, a5Threshold2Rsrp, lbThreshold…) → All parameters are OK.

I would like your help to solve this issue ,

thanks in advance.

6

Do you have loadBalancing parameter in EUtranCellRelation MO set 1 (ALLOWED) for the relations you want the load balancing to happen?
What is the value of qciSubscriptionQuanta in QciProfilePredefined MO for default and QCI6-9?

7

i have loadbalancing = 1 (allowed) for the relation on co-site and qciSubscriptionQuanta=1000 for default and QCI6-9

8

What are the bandwidths for L1800 and L2100? What values you are using for cellSubscriptionCapacity?

10

L1800 bandwidth = 15Mhz and cellsubscriptioncapacity = 25500
L1800 bandwidth = 10Mhz and cellsubscriptioncapacity = 17000

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11

Which counters you are checking for verifying the InterF Load Balacing Attempts and Success?

12

verification couters is :
pmHoPrepAttLteInterFLb ; pmHoPrepSuccLteInterFLb ; pmHoExeAttLteInterFLb;pmHoExeSuccLteInterFLb