Drive Test Analysis

Drive Test Test Process

 MobileComm  Mobile Comm Technologies India Pvt. Ltd.

Dallas

.  Atlanta . Washington . LA .

Sao Paulo . New Delhi . Toronto

. Muscat. Sydney

Copyright 2010 MobileComm MobileComm Technologies India Pvt. Ltd.  All rights reserved MobileComm Mobile Comm is  is committed to providing our customers with quality instructor led Telecommunications Training. This documentation is protected by copyright. No part of the contents of this documentation may be reproduced in any form, or by any means, without the prior written consent of MobileComm Mobile Comm Technologies . Document Number: RK/CT/3/2010 This manual prepared by: MobileComm Mobile Comm Technologies MobileComm Technologies(India)Pvt. Technologies(India)Pvt. Ltd. 424, First Floor, Udyog Vihar Phase -4, Gurgaon-122002 Headquarter: MobileComm Professionals Inc. 1255 West 15th Street, Suite 440 Plano, TX, 75075 Tel: (972) 633-5100 Fax: (972) 633-5106

www.mcpsinc.com

Copyright 2010 MobileComm MobileComm Technologies India Pvt. Ltd.  All rights reserved MobileComm Mobile Comm is  is committed to providing our customers with quality instructor led Telecommunications Training. This documentation is protected by copyright. No part of the contents of this documentation may be reproduced in any form, or by any means, without the prior written consent of MobileComm Mobile Comm Technologies . Document Number: RK/CT/3/2010 This manual prepared by: MobileComm Mobile Comm Technologies MobileComm Technologies(India)Pvt. Technologies(India)Pvt. Ltd. 424, First Floor, Udyog Vihar Phase -4, Gurgaon-122002 Headquarter: MobileComm Professionals Inc. 1255 West 15th Street, Suite 440 Plano, TX, 75075 Tel: (972) 633-5100 Fax: (972) 633-5106

www.mcpsinc.com

UMTS Call Flow

3

UMTS Call Flow

Call to a MS Activate Algorithms

on PICH/ Paging SCCPCH

Call from a MS (Paging Perf.) (Random Access)

Open Loop Power Control

on RACH

Power Ctrl. •Directed Retry

(RRC Connect. Perform.)

Code Ctrl.

on FACH/RRC SCCPCHConnection

Predefined Signaling RAB Selected

 Admission Ctrl. Ctrl. MEASUREMENTS

RAB Selection

on FACH/ SCCPCH RAB

 Assignment

(Available TCH)

•Load Sharing

Assignment of DPDCH (RAB Establish. Fail.)

(Traffic Erlangs) on Supervision DPDCH

(Call Quality) (Throughput) (Handover Perf.)

Soft/Softer Handover/Clear(Dropped Calls)

4

Soft Handover •Inter cell/BSC •Intra cell/BSC •OL/UL •Bad Quality •Urgency HCS

  p   o   o    L   r   e    t    l   u   o   r    O    /   t   p  n   o  o   o    C    L  r   r   e   e  w   n  o   n    I    P

UMTS Call Flow

5

Tools For Tuning/Optimization & Data Post Processing Active measurement needed due to lack of statistics

• • • • • • •

TEMS Investigation for WCDMA (Software) TEMS Scanner (Software + HW) External GPS User Equipment (UE) TEMS DeskCat for post processing MCOM3g/Mapinfo/MIPT MS Access/Excel based tools

WINDOWS USED IN WCDMA DRIVE TEST

RADIO PARAMETERS WCDMA BAR CHARTS

CURRENT CHANNEL

SERVING/ACTIVE + NEIGHBOURS WCDMA

AMR CODEC USAGE IN WCDMA

Notes on quantities denoting signal power

Drive test tools configuration

Drive Test Equipments for Voice, CS64 & PS call Short call

Long Call

USB1

CS64

PS

USB2 USB1

GPS

Com 1

scanner

USB1

Drive Test Routes

PILOT TUNING

The basic measurements of scanner are • CPICH_RSCP (received signal code power) • CPICH_Ec/No (received energy per chip divided by the power density in the band) • RSSI (received signal strength indicator) What can you achieve with scanner? • Crossed feeder issues (DL) • Coverage verification • Interference problems (overshooting cell, pilot pollution) • Missing neighbours

COVERAGE VERIFICATION - Primary Common Pilot Channel Verify P-CPICH detection to minimize coverage holes •

P-CPICH RSCP

•

P-CPICH Ec/No Coverage level

RSCP  [dBm]

E c  /N 0  [dB]

Sufficient

 RSCP   100

 E c /N 0  14

Poor

115   RSCP