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Pages: 10
Category: Other Topics
Date Submitted: 01/02/2012 07:24 AM
Quality of Service Monitoring/B7
• Introduction
• • • • • Global Indicators HO Indicators Directed Retry Indicators Radio Measurement Statistics Traffic Indicators
MAGELLAN COMMUNICATIONS PRIVATE AND CONFIDENTIAL
GABRIEL C. ALVERO
1
Introduction
Four stages of a call establishment
1. Radio Link Establishment
Establishing SDCCH connection
2. SDCCH phase
Authentication & Cyphering
3. TCH Assignment
Establishing TCH connection
4. Alerting/Connection phase
Establishing conversation or data connection
MAGELLAN COMMUNICATIONS PRIVATE AND CONFIDENTIAL
GABRIEL C. ALVERO
2
RLE>OC
SDCCH
RSL
COC
MAGELLAN COMMUNICATIONS PRIVATE AND CONFIDENTIAL
GABRIEL C. ALVERO
3
RLE>TC
SDCCH
RSL
COC
MAGELLAN COMMUNICATIONS PRIVATE AND CONFIDENTIAL
GABRIEL C. ALVERO
4
RLE>Failures
Congestion BSS Problem
Radio Problem Real Radio >> unbalanced power budget, bad coverage, interference Phantom RACH >> noise decoding, chl request and HO_ACCESS sent to neighbor cell
MAGELLAN COMMUNICATIONS PRIVATE AND CONFIDENTIAL GABRIEL C. ALVERO 5
SDCCH Phase>OC
MAGELLAN COMMUNICATIONS PRIVATE AND CONFIDENTIAL
GABRIEL C. ALVERO
6
SDCCH Phase>TC
MAGELLAN COMMUNICATIONS PRIVATE AND CONFIDENTIAL
GABRIEL C. ALVERO
7
SDCCH Phase>Failures
Drop Radio
Drop BSS
MAGELLAN COMMUNICATIONS PRIVATE AND CONFIDENTIAL
GABRIEL C. ALVERO
8
TCH Assignment Phase>OC,TC
RTCH
TTCH
CIC
MAGELLAN COMMUNICATIONS PRIVATE AND CONFIDENTIAL
GABRIEL C. ALVERO
9
TCH Assignment Phase>Failures
Congestion
Radio Problem
MAGELLAN COMMUNICATIONS PRIVATE AND CONFIDENTIAL
BSS Problem
GABRIEL C. ALVERO 10
Alerting/CNXN Phase>OC,TC
MAGELLAN COMMUNICATIONS PRIVATE AND CONFIDENTIAL
GABRIEL C. ALVERO
11
Alerting/CNXN Phase>Failures
Transcoder Problem
Radio Problem
BSS Problem
MAGELLAN COMMUNICATIONS PRIVATE AND CONFIDENTIAL
GABRIEL C. ALVERO
12
Alerting/CNXN...