VQI Optimization Improvement by turn off Speech codec 5.9, 7.4 and 4.75 Kbps in Huawei 2G Network

In this chapter I would like to share about VQI(Voice Quality Index) improvement in Huawei 2G Network by setting off Several speech codec.Turn off speech codec is a better way to improve Voice Quality Index(VQI) in 2G network and Your KPI will improve significantly. As I share before, we can also improve VQI by setting more Full rate and re-dimension channel. Setting more Full rate and re-dimension channel to be More TCHFR also working but you will get more result and significant improvement on VQI by turn off several lower codec 5.9, 7.4 and 4.75 Kbps. Here is the result of VQI after turn off codec 5.9, 7.4 and 4.75 kbps in Huawei 2G network.

From the above Graph we can see the result of  VQI 3.5 improved significantly after turn off speech codec 5.9,7.4 and 4.75 Kbps. Now you can trial and implement also in your Network to get same result for the optimization improvement.Detail technical step and parameter change can be shown as below list.

Script Parameter change for above change request:
SET GCELLCCAMR:IDTYPE=BYID,CELLID=XXX,,ACTCDSETF=4_75KBIT/S-0&5_15KBIT/S-0&5_90KBIT/S-0&6_70KBIT/S-0&7_40KBIT/S-0&7_95KBIT/S-0&10_2KBIT/S-0&12_2KBIT/S-1;

Conclusion to improve Voice Quality index(VQI) in Huawei 2G Network:
1. Increase Full rate and re-dimension channel, result==>Little bit VQI improvement
2. Turn off codec 5.9,7.4 and 4.75 Kbps, result==>Significant VQI Improvement

You might also Need to know:
- VQI(Voice Quality Index) and Drop Call rate improvement in 2G Huawei by Setting more Full Rate and redimension channel
- 2G Theory and Concept
- Common question about RF Optimization
- TCH Block Rate Optimization Tips in Huawei GSM
- 2G Voice Quality Improvement by TRX Layering priority in Huawei GSM
- TBF Drop Improvement tips in Huawei GSM
- GPRS Packet Data Access Success Rate(PDASR) Improvement in Huawei GSM
- Call Drop Rate improvement by Parameter change in 3G UMTS/WCDMA Huawei Network
- Trial Power Control in GSM Huawei for Quality Improvement
- Power Control activation for Electricity Saving in Huawei GSM
- Handover Meaning in GSM and How to Optimize Handover Success Rate (HOSR) for GSM KPI Improvement
- WCDMA CSSR Optimization Tips
- CSSR Optimization for GSM and WCDMA
- Drop Call Rate Optimization, How to identify and finding root cause for Optimization solution on GSM and UMTS Network