LTE Optimization

Hello Guys,
What are the possible reasons for bad SINR if RSRP & RSRQ are good in IBS?

Is there any interference from macro neighbours, then u can reduce pzeronominalpucch and pzeronominalpusch and check . In case u are getting poor throughput, then scheduling algorithm bcan be changed to proportional fair low

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There is no interference from Marco neighbours.

RSRP and RSRQ are downlink signal strength and channel condition report. SINR in IBS is uplink signal to interference noise ratio.
First you should check if it is FDD or TDD. For FDD, uplink and downlink channel is not reciprocal to each other.
Secondly, even for TDD mode, uplink and downlink is reciprocal. However SINR in IBS may be bad since multi-user interference is specific for each user.

“SINR in IBS is uplink signal to interference noise ratio” I doubt about that. Can you please explain further? @Wendy
It is FDD and SINR is good in uplink testing but it is bad in downlink testing.
SINR is good in other areas of the building with the same Radio conditions.

According to my understanding, IBS here is referring to integrated basestation.

SINR is the most important metric to evaluate the receiver link quality, just like EVM is the receiver. So it is straightforward, iBS Rx link is the uplink.

IBS: In-building solutions means for indoor

my mistake, I thought it’s common that’s why I didn’t mention indoor.