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

What are the conditions you typically set to trigger IRAT handover?

RSCP and Ec/Io are used to trigger IRAT handover:

1.       RSCP ≤ -100dBm.

2.       Ec/Io ≤ -16dBm.

Find more document on IRAT
WCDMA IRAT Handover
Details on IRAT Parameter Optimization Document

How many channelization codes are available?

The number of channelization codes available is dependent on the length of code.  In the uplink the length is defined as between 4 and 256.  In the downlink the length is defined as between 4 and 512.

Know more about Scrambling Code

UMTS Scrambling Code Planning Guide

What is channelization code?

Channelization codes are orthogonal codes used to spread the signal and hence provides channel separation, that is, channelization codes are used to separate channels from a cell.

To Know more on WCDMA

100 WCDMA Documents

LTE Presetations