Factors Affecting Throughput in LTE :- Low mcs, Low sinr, Low rsrq , high prb usage, wrong earfcn Definition, no Carrier aggregation ör missing ca configuration, Pci , Route sequence index collision, Wrong tac planning, gateway security problem, etc. air quality (now sinr, rsrq, etc etc), modulation level. For example, 16QAM, 64QAM, etc. Low Throughput Issue:- 1 - Poor coverage (BLER) 2 - Availability issue 3 - Uplink Interference 4 - A poor RACH decoding SR 5 - High error on S1 link. 6 - Delay on S1 link towards MME & SGW. 7 - Accessibility issue. 8 - Handover failure. 9 - Lack of PRBs. 10 - Problematic UE. 11 - Downlink Interference (Bad CQI) 12 - MIMO Parameters 13 - High VSWR 14 - High radio errors or instability issue. 15 - Maximum number of RRC connections active per cell 16 - Maximum number of users per TTI supported per cell. 17 - Core network, MME/SGW, etc 18 - Transmission instability & bottleneck. 19 - Incorrect parameter setting. 20 - Badly tuned handover parameters...
Hi All
some guidelines for optimization on Nokia system
The first KPI is TCH drop and Its analysis.
some guidelines for optimization on Nokia system
The first KPI is TCH drop and Its analysis.
Possibilities :
- Interference on BCCH TRX
- Interference on hopping TRX(DL Interference)
- External Interference (UL interference)
- Bad Neighbor Relation (bad HO)
- Low Coverage
- HW Faulty or TRX Power Unbalance
- Other : A_If, TR or LAPD Fail
Some Important Reports number for Nokia system to analyze the TCH drop:
Preparation Data :
- BCCH Planning, ND report 072 (DL Interference distribution)
- ND Report 216, 196 and Alarm (Interference)
- ND Report 204, 153, 195 ( HO fail and Path Balance)
- ND Report 232 ( Coverage cell)
- ND Report 163 or TQM drop per causes
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