Radio Resource Management in 3G umts by Pakhto

۲ ۱

Node BUser Terminallink

Diversity

Diversitywideband WCDMA

Spreading Band

۲ ۲Transport

Radio NetworkTransport Channel

Bit rate for transport channel

connection

transport format indicator TFI

Transport

dedicated channelcommon control

channel

.1

.2

–Broadcast Channels

–Forward Access Channel FACH

–Paging Channel

–Random Access Channel

–

۳ ۲Spreading & Modulation

UMTS

۲ ۳ ۱Scrambling transmitterscrambling

base stationSpreading

۲ ۳

۲ ۳ ۲Channelization CodesChannelization Codes

WCDMAOVSF codes

Spreading

۱ ۳

CDMA

fast power controlrandom access procedures

diversityCDMAUTRA FDD

•fast closed loop power control procedure

•Inner Closed Loop Power Control

•Open Loop Power control

۲ ۳

Inner Closed Loop Power ControlCDMA

– uplink near-far problem

Soft handoffcompressed mode

SIROuter Loop Power Control

Fast Power Control

۳ ۳

Open Loop Power ControlCPCHRACH

IS – 95

Parallel Configuration

Open Loop Power ControlLink

۴ ۳RACH

WCDMANear for

•Scrambling CodesSignaturesBroadcast

Channel BCH

•

•RACH

Open Loop Power ControlDownlink

RACH

•SignaturesRACH1 ms

•AICHPreambles

•AICHPreambles

1 dB

•AICH10 ms 20 ms RACH

۶ ۳

Power control headroomPULPower budgetEb No

power control

indoor DAS

Distributed Antenna System

Base stationhost Spots

۴

co-channel

UMTS

• Conversationaldelayjitter

•StreamingdelayMedium leveljitter

•Interactivedelayround trip delayBit error rate BER

•Performanceapplications

•

•Optimization

Radio Resource Management

•congestion

Quality of Service QoS

•Loadcongestionapplications

Radio Resource Management RRM

–Power

–Handoff

–congestion •Admission

•Load

•

۲ ۴Power

PowercriticalWCDMA

interferenceWCDMA

WCDMA

adjustingRRM

Poweruplink transmissionUser Equipment

User Equipmentinterference

Power

uplink transmissionUser EquipmentNode BPower

blockUser Equipment

Node B

Phenomenon– near-far

downlink transmissionUser Equipment

receivingPower

Power

UMTSPower

•User Equipment

•interference

•– near-far

•User Equipment

WCDMAPower

•

•

۱ ۲ ۴

User Equipment

User Equipment

uplinkdownlink

±9dB normal tolerancetolerance12dB

User Equipmentinitiallevel

Common Pilot Channel CPICH

Power

UMTSOpen Loop Power Controluplinkdownlink

Open Loop Power Control

–UplinkOpen Loop Power Control

–DownlinkOpen Loop Power Control

User Equipment UEPhysical Random Access Channel PRACH

Power

Dedicated Physical Control Channel DPCCHUser

Equipment UEinner loop

۴ ۲ DPCCH Initial Power = DPCCH_Pwr_Offset – CPICH_RSCP

DPCCHinitial power

۵

UMTS

.1WCDMA

.2Quality of Service QoSUMTS

UpdatingQuality of Service QoS

congestion

۲ ۵WCDMA

3GPPAdaptive Step Power Control

WCDMA۱۵

command۱۰

1500 bps

WCDMA

۵ ۳

bit rateService Degradation Descriptor SDD

SDD05

SDD

UMTS

•Conversational

•Streaming

•Interactive

•Background

Conclusion

Universal Mobile Telecommunication System UMTS

Optimization

1. Bernhard H. Walke, “The UMTS Fundamentals of UMTS” 2nd Edition Seidenberg House Inc

2. Sofoklis A. Kyriazako, 2007 “UTRAN Overall Description” 4rd Edition , IEEE Publications IEEE House Inc

3. George T. Karetsos 2006 “Pactical Radio Resource Management in Wireless Systems” 4th Edition, Artech House Inc

4. Dipo A Parsad, 2004 “Radio Interface Protocol Architecture” 2nd Edition, India – NavLablaries Publications

5. Laiho K Jaana, 2008, “Spreading and modulation FDD” 3rd Edition, Nevada Publication House Inc

6. Wacker Tomas, 2002, “Radio Network Planning and Optimization for 3G UMTS Network” 2nd Edition, Wiley Publication House

7. Elbatji Rachidi, 2007, “Multiplexing and Channel Coding FDD” 3rd Edition, Bouzekri Publication House Inc

8. ebbane A.Y, 2003 “QoS-aware Power Control and Handoff Prioritization in 3G WCDMA Networks” 2nd Edition, IEEE Publication

9. Prof. Sallent Xavier, 2006 “QoS and Radio Resource Management in 3G and Beyond Systems” 2nd Edition, IEEE Publication

10.Philipe Godlewski, 2009 “A Power Control Algorithm for 3G WCDMA System” 3rd Edition, Queen Mary University London

11.Shaikh Ayaz Ahmad, 2002 : Radio Resource Management Strategies in 3G UMTS Networks”, 2nd Edition, Prentice Hell Publication

12.Yue Chen, 2005, “Soft Handover Issues in Radio Resoure Management for 3G WCDMA Networks” Ph.D Thesis, Queen Mary University London

13.Stallings William, 2005 “Wireless Communications and Network”, 2nd Edition, Prentice Hall Publication