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.
Top LTE Optimization Methods
Coverage Optimization
• Adjust RSRP thresholds for better handovers
• Optimize PCI planning & reuse
• Fine-tune antenna tilt and azimuth
• Balance Tx power across uplink/downlink
⸻
Capacity Optimization
• Activate Carrier Aggregation (CA) for better throughput
• Deploy advanced MIMO configurations (2x2, 4x4, 8x8)
• Tune scheduler algorithms (PF, Max CQI)
• Balance PRB utilization across congested sectors
⸻
Interference Reduction
• Apply ICIC, eICIC, FeICIC in high-noise zones
• Use FFR/SFR to improve cell-edge performance
• Remove unused intra-frequency neighbors
• Realign antenna azimuths and tilts to limit overlap
⸻
Mobility Optimization
• Refine handover thresholds (A3 offset, TTT, hysteresis)
• Reduce ping-pongs by tuning HO cause logic
• Improve inter-frequency HO between LTE bands
• Ensure consistent neighbor relations across cells
⸻
Throughput & QoS Tuning
• Optimize CQI feedback loops
• Configure DRX cycles for speed and power efficiency
• Adjust QCI values based on service type (VoLTE, video)
• Enhance TCP/PDCP buffering for better throughput
⸻
VoLTE Optimization
• Ensure smooth fallback via SRVCC/CSFB
• Monitor VoLTE jitter, MOS, RTP delay
• Refine SIP timers (T1, T2, T4) for call setup
• Prioritize voice with correct QCI-1 tuning
⸻
Parameter Audits & SON Tuning
• Audit parameter consistency across cells/clusters
• Verify SON/ANR neighbor accuracy
• Clean up unused features and legacy configs
• Apply auto-tuning for adaptive network parameters
LinkedIn: Top LTE Optimization Methods | Aniket Ghosh posted on the topic | LinkedIn
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