How WCDMA OSS Works?

Doc For This with Below Containing :

• Cell & Channel Management
• Adjacent Cell Configuration Management
• Radio Network Optimization
• WCDMA Neighboring Cell Support (WNCS)
• WCDMA Measurement Result Recording (WMRR)
• Alarms Status Matrix
• Alarm Log Browser
• Alarm List Viewer
• Element Manager
• RNC Element Manager
• RBS Element Manager
• Bulk Configuration C

Doc Link : WCDMA OSS DOC

What is Paging Success Ratio? What is the typical PSR that you have seen in a WCDMA UMTS network?

Paging Success Ratio:

Its Paging Responces to the Paging Attempts in WCDMA UMTS network.

Typical Value for Good WCDMA Cellular Network is greater than 90%. 

What are the possible causes for an IRAT Failure?

There are several reasons for IRAT failure in cellular network optimization.
Major 4 reasons which played good role in WCDMA Optimization.

·         Missing 2G relations

·         Non availability of 2G Resources

·         Poor 2G Coverage

·         Missing 3G Relations

What is the typical event sequence of IRAT Handover from 3G to 2G

Simple IRAT Handover Flow

Event 2d –entering into compressed mode –measurement of 2G candidates – Event 3a –Verification of 2G resources

Handover from UTRAN Command from 3G RNC to UE

Download Complete UMTS CS Call Flow

What are the typical KPIs you use to measure a network and what criteria?

• Access failure rate (≤ 2%).
• Call setup time (CS: over 95% of the time < 6-second for mobile-to
• PSTN, 9-second for mobile-mobile.  PS: over 95% of the time < 5 second).
• Dropped call rate (≤ 2%).
• BLER: over 95% of the blocks ≤ 2%.
• Average DL/UL throughput for PSD: 210kbps for loaded, 240kbps for unloaded.

Find the complete UMTS KPI from Here

Information on UMTS KPI BenchMark

CPICH Optimization

Good Document on CPICH Optimization from Maxis

CPICH Optimization

You can view Document Here

Content

• Objective
• Technical Background
• Deployment Area
• Performance Results
• Traffic Results
• Capacity Results
• Summary

Download Full Document in PDF from Here

Deployment of CPICH optimization is driven by:
–Improving current 3G coverage and increase 3G traffic
–Improve in-building penetration for 3G
–Reduce IRAT HO to 2G
–Offload traffic from 2G layer

How Can We Avoide IRAT Handover?
Traffic Shift Strategy for 3G to 2G

20 years of GSM from NSN

A very good PPT on 20 years evolution of GSM.
Good infographics presentation.

Find the whole Presentation Click Here

Find the whole Presentation Click Here

Key Highlights 

• The World’s First commercial GSM network –July 1st 1991
• Key steps to World’s First commercial GSM network
• VintageGSM mobile phones
• GSM Evolution -gradual improvements since 1990
• GSM dominates the world today…
• GSM umbrella coverage with Single RAN Advanced
• Advancingbusiness opportunitiesin GSM
• Liquid RadioOne Simplified Network
• Nokia Siemens Networks leadership in GSM family of technologies