GSM BSS Network KPI (MOS) Optimization Manual

**koepret** · 2011-06-14, 01:24 AM

GSM BSS Network KPI (MOS) Optimization Manual

Contents
1 Basic Principles of MOS
1.1 Subjective Speech Quality Evaluation
1.2 Objective Speech Quality Evaluation 3
1.2.1 PSQM (P.861) Recommendation or Algorithm
1.2.2 PESQ (P.862) Recommendation or Algorithm
1.2.3 P862.1 Recommendation (Mapping Function for Transforming)
1.2.4 P.563 Recommendation
1.3 Speech Processing of Involved NEs
1.3.2 MS
1.3.3 BTS
1.3.4 BSC
1.3.5 UMG
2 Factors That Affect the MOS in GSM
2.1 Introduction to GSM Speech Acoustic Principles
2.2 Impact of Field Intensity and C/I on the Speech Quality
2.3 Impact of Handover on the Speech Quality
2.4 Impact of DTX on the Speech Quality
2.5 Impact of Speed (Frequency Deviation) on the Speech Quality
2.6 Impact of Speech Coding Rate on the Speech Quality
2.7 Impact of Transmission Quality on the Speech Quality
3 Method of Analyzing the Problem of Low MOS
3.1 Process of Analyzing the Problem of Low MOS
3.2 Method of Solving the Problem of Low MOS
3.2.1 Consistency Check and Sample Check
3.2.2 Um Interface Check
3.2.3 BTS Check
3.2.4 Abis Transmission Check
3.2.5 BSC Check
3.2.6 A Interface Transmission Check
3.2.7 MGW Check
3.2.8 Miscellaneous (Comparison of MOS Before and After Network Replacement)
4 Test Methods and Suggestions
4.1 Test Tool Selection and Test Suggestions
4.2 Suggestions on the Test of the Existing Network
5 MOS Cases
5.1 Differences Between Speech Signal Process and Signaling Process
5.1.1 GSM Speech Signal Process
5.1.2 Signaling Process
5.2 Identified MOS Problems
6 Feedback on MOS or Speech Problems
6.1 Test Requirements
6.2 Requirements for Configuration Data in Existing Network

enjoy it

Koepret
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