umts system telenor fou josef noll 991201 page 1 umts system & planning aspects, 2.-3.12.1999...

UMTS system Telenor FoU

Josef Noll 991201

UMTS system & planning aspects, 2.-3.12.1999

Link and system level simulations aspects related to network planning

Josef NollTelenor R&DGroup for Mobility and Personal Communications

[email protected]


Josef Noll 991201

Outline

• UMTS expectations• Capacity and network planning aspects

• Link level simulations• System level simulations• First results/critical items


Josef Noll 991201

UMTS expectations

• Same technology all over the world: WCDMA at 2 GHz

• UMTS terminals expected to work in 3 modes: multi-carrier FDD, direct sequence FDD, and TDD, prototype: Q4.2000 (source: Ericsson)

• Universal user identification: USIM

• Seamless service

• Integration of services: One service platform

• Extension towards integration of satellite communications, W-LAN /

Hiperlan and fixed networks

UMTS

2010 2025 MHz19801900 2110 2170 2200

FDD TDDSAT FDD SAT

UMTS

2010 2025 MHz19801900 2110 2170 2200

FDD TDDSAT FDD SATTDD1920


Josef Noll 991201

GSM versus UMTS system limitsGSM

• Co-channel interference• Interference limited system• Increased traffic increased #

of sites

UTRA• Adjacent-channel interference• Noise limited system• QoS and traffic contribute to

cell size

- # TRX- interference

- # users- Quality requirements


Josef Noll 991201

Capacity calculations


Josef Noll 991201

Link level simulation

•Calculation of the Eb/No ratio

– Eb - energy per information bit

– No - noise power spectral density

•Output of the link level simulator

– Error patterns

– BER (Bit Error Rate) performance curves as a funnction of the Eb/No ratio


Josef Noll 991201

Propagation channel model

TDL model of the Indoor to outdoor A channel

Indoor to outdoor A channelTap Relative delay [ns] Average power

[dB]Dopplerspectrum

1 0 0 CLASSIC2 110 -9.7 CLASSIC3 190 -19.2 CLASSIC4 410 -22.8 CLASSIC

TDL model of the Vehicular A channel

Vehicular A channelTap Relative delay [ns] Average power

[dB]Dopplerspectrum

1 0 0.0 CLASSIC2 310 -1.0 CLASSIC3 710 -9.0 CLASSIC4 1090 -10.0 CLASSIC5 1730 -15.0 CLASSIC6 2510 -20.0 CLASSIC


Josef Noll 991201

Parameters for link level simulations

•Basic simulation parameters

•Mapping of the considered services

– Long constrained delayed services

– Unconstrained delayed services

Application Sourcebit rate[kbit/s]

Channel model Mobilespeed[km/h]

CellLayout

BERrange

Audio 64 Vehicular A 120 Macro 10-3 10-7

Audio 144 Vehicular A 120 Macro 10-3 10-7

Video 384 Outdoor to Indoor A 3 Micro 10-3 10-7


Josef Noll 991201

Link level specifications

CSELT UMTS link level simulator, copyright: CSELT & EURESCOM P921

FUNCTIONAL BLOCK W-CDMA TD-CDMA

Coding/decoding Convolutional/Turbo Convolutional/Turbo

Interleaving Block interl. Block interl.Rate matching Puncturing/repetition Puncturing/repetitionFrame generation Channel Mux

(DPDCH/DPCCH)Channel Mux(DPDCH/midamble)

Modulation/spreadingFiltering Raised Cosine Raised CosinePropagation Channel ETSI/ITU model ETSI/ITU modelReceiver Rake Joint-Detection (ZF-BLE)Phase Recovery Dedicated Pilot channel Midamble assistedPower control C-based closed loop C-based closed and open

loopIntegration andverification

Software testing Software testing


Josef Noll 991201

BER results and capacity evaluation

Eb/No [dB]

BER

BERtarget

System workingpoint

Capacity evaluations


Josef Noll 991201

The integration of the link level simulator with the application layer requires the emulation of the intermediate protocol layers (in particular from L2 to L6).

To this scope, an off line program that performs the integration has been developed.

Integration with the application layer

Functionality like ARQ (Automatic Repeat reQuest) at layer 2 are also implemented in case of UDD (packet switched) transmission.


Josef Noll 991201

Application testing

Link level simulator

Off-lineprogram

Application server

Application client

Layer 1error pattern

Layer 7error pattern

Errorinsertion

QoS assessment

FDD mode


Josef Noll 991201

Link performance evaluation

6789

1011

121314151617

1 10 100 1000

Mobile speed [km/h]

Eb

/No

[dB

] @ B

ER

=0.1

%

Outdoor to indoor A

Outdoor to indoor B

Vehicular A

Vehicular B

FDD mode

Downlink

Voice service (8 kbit/s)

Working point:Eb/No [dB] @ BER=0.1%as a function of mobilespeed and propagationenvironment


Josef Noll 991201

Link performance evaluation

1.E-04

1.E-03

1.E-02

1.E-01

6.5 7.5 8.5 9.5 10.5 11.5 12.5 13.5 14.5

Eb/No [dB]

BE

R

v=250 km/hv=50 km/hv=25km/h

v=3 km/hv=120 km/h

TDD mode

Downlink (1 user per slot)

Voice service (8 kbit/s)

Channel : vehicular A

BER vs. Eb/No and mobilespeed


Josef Noll 991201

System level simulation

•Input

– Error patterns

– BER (Bit Error Rate) performance curves as a funnction of the Eb/No ratio

•Application testing

– bitrate, delay

– error pattern

•Capacity of the network


Josef Noll 991201

Real Time Emulator (Telefonica) objectives

• Check the QoS in several enviroments• Definition of requirements for equipment providers or

manufacturers• Provide indications about radio network dimensioning

by threshold definition of applications – identify threshold for applications

– provide as input for capacity of the network


Josef Noll 991201

RTE concept (ACTS RAINBOW)

• Bit oriented Processing (BOP) (ARQ procedures not implemented): uses Hidden Markov Models to produce error patterns.

• Packet oriented Processing (POP) (ARQ procedures are implemented): based on look-up tables of packet loss & delays probabilities.

RTE Process Unit

RTE Processor

RTE Controller

Real Time Emulator

Mobile Terminal Emulator

Fixed Terminal Emulator

Control Terminal

Channel parameters

Services Services

Performances


Josef Noll 991201

System level simulation results

Input Functionality Results

Environment Power control % blocked

Traffic macrodiversity % dropped

Applications Soft Handover % satisfied users

# users in macrodiversity


Josef Noll 991201

System level results: ETSI FDD

UL DL UL DL UL DL

Speech

Bit-Rate kBit/s 8 8 8 8 8 8

maximum Range m 1030 900 1020 910 5900 7350

Spectrum efficiency (kBit/s)/MHz/cell 135 74 123 125 90 71

Simultaneous Users Erlang 169 92 154 157 112 89

Eb/N0 dB 3,2 6,0 3,3 6,1 5,4 7,9

LCD-MM

Bit-Rate kBit/s 2048 2048 384 384 384 384

maximum Range m 210 230 450 520 2800 3900

Spectrum efficiency (kBit/s)/MHz/cell 176 269 461 192 177

Simultaneous Users Erlang 0,43 3,5 6 2,5 2,3

Eb/N0 dB 1,8 1,6 1,3 1,1 2,9 3,2

UDD-HM

Bit-Rate kBit/s 2048 2048 384 384 384 384

maximum Range m 310 350 500 520 2600 3900

Spectrum efficiency (kBit/s)/MHz/cell 273 453 449 668 216

Simultaneous Users Erlang 50 82 91 135 42

Eb/N0 dB 0,6 0,1 0,4 0,1 2,4 2,0

Indoor Pedestrian Vehicular


Josef Noll 991201

Critical issues, example

• Radio planning in a 10 MHz setup

• UMTS adjacent channel reduction - 33 dB

• Power low for radio wave propagation:

P1 /P2 ~ (d2 /d1)3

• Assume:

Macro cell range d1 = 1 km

--> blind zone d2 = 70 m

• Blocking of macro-cells through neighbour micro-cells

d1 d2


Josef Noll 991201

Conclusions

• UMTS is part of IMT 2000 family of radio interface– 3GPP: UTRA (DS) with FDD and TDD, chiprate 3.84 Mc/s– 3GPP2: cdma2000 (MC), chiprate: 3 x 1.25 Mc/s– UWC-136: TDMA, evolution from EDGE– DECT: Multi-carrier TDMA

• Link level simulations provide BER, delay, Eb/No ratio• System level simulation provide network parameters:

- delay, errors, quality of applications- network performance

• Telenor is missing proper simulation tools

umts system telenor fou josef noll 991201 page 1 umts system & planning aspects, 2.-3.12.1999...

Documents

umts system planning

conclusions umts

umts terminals

system level results

network slide

capacity evaluation

ebno ratio slide

etsi fdd slide