402RF Optimization - Course 402+ CDMA Field RF Optimization...

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May, 2002 402+ 1 Course 402+ Optimization with Agilent Tools (c) 2002 Scott Baxter Course 402+ CDMA Field RF Optimization Using Agilent Tools CDMA Field RF Optimization Using Agilent Tools Scott Baxter www.howcdmaworks.com 800-890-0829 615-331-3880fax Scott_Baxter@msn.com
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May, 2002 402+ 2 Course 402+ Optimization with Agilent Tools (c) 2002 Scott Baxter Contents of Course 402+ Introduction to Optimization Concepts 3 The Field Performance Indicators 6 “Signatures” of Performance Problems 16 PN Planning and Setting Search Windows 25 Data for Optimization: System and Mobile Perspective 47 Analyzing Performance Data from the System 49 Settable System Parameters 66 Examples ext. Collecting, Analyzing Performance Data from the Mobile 82 Examples ext. Multiple Carriers, Intercarrier/Intersystem Handoff, Acquisition 91 Applied Optimization and Troubleshooting 114 A Glimpse of 1xRTT Performance Optimization 148 Heavy Sector Loading Example 177
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May, 2002 402+ 3 Course 402+ Optimization with Agilent Tools (c) 2002 Scott Baxter What is Performance Optimization? The words “performance optimization” mean different things to different people, viewed from the perspective of their own jobs System Performance Optimization includes many different smaller processes at many points during a system’s life recognizing and resolving system-design-related issues (can’t build a crucial site, too much overlap/soft handoff, coverage holes, etc.) “cluster testing” and “cell integration” to ensure that new base station hardware works and that call processing is normal “fine-tuning” system parameters to wring out the best possible call performance identifying causes of specific problems and customer complaints, and fixing them carefully watching system traffic growth and the problems it causes - implementing short-term fixes to ease “hot spots”, and recognizing problems before they become critical
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May, 2002 402+ 4 Course 402+ Optimization with Agilent Tools (c) 2002 Scott Baxter Starting Optimization on a New System RF Coverage Control try to contain each sector’s coverage, avoiding gross spillover into other sectors tools: PN Plots, Handoff State Plots, Mobile TX plots Neighbor List Tuning try to groom each sector’s neighbors to only those necessary but be alert to special needs due to topography and traffic tools: PSMM data from mobiles; propagation prediction Search Window Settings find best settings for SRCH_WIN_A, _N, _R especially optimize SRCH_WIN_A per sector using collected finger separation data; has major impact on pilot search speed Access Failures, Dropped Call Analysis finally, iterative corrections until within numerical goals Getting these items into shape provides a solid baseline and foundation from which future performance issues can be addressed.
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May, 2002 402+ 5 Course 402+ Optimization with Agilent Tools (c) 2002 Scott Baxter Performance Monitoring/Growth Management Benchmark Existing Performance Dropped Call %, Access Failure %, traffic levels Identify Problem Cells and Clusters
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402RF Optimization - Course 402+ CDMA Field RF Optimization...

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