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UMTS system Telenor FoU Josef Noll 991201 Page 1 UMTS system & planning aspects, 2.-3.12.1999 Link and system level simulations aspects related to network.

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Presentation on theme: "UMTS system Telenor FoU Josef Noll 991201 Page 1 UMTS system & planning aspects, 2.-3.12.1999 Link and system level simulations aspects related to network."— Presentation transcript:

1 UMTS system Telenor FoU Josef Noll Page 1 UMTS system & planning aspects, Link and system level simulations aspects related to network planning Josef Noll Telenor R&D Group for Mobility and Personal Communications

2 UMTS system Telenor FoU Josef Noll Page 2 Outline UMTS expectations Capacity and network planning aspects Link level simulations System level simulations First results/critical items

3 UMTS system Telenor FoU Josef Noll Page 3 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: Q (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 MHz FDDTDDSATFDDSAT UMTS MHz FDDTDDSATFDDSAT TDD 1920

4 UMTS system Telenor FoU Josef Noll Page 4 GSM versus UMTS system limits GSM 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

5 UMTS system Telenor FoU Josef Noll Page 5 Capacity calculations

6 UMTS system Telenor FoU Josef Noll Page 6 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

7 UMTS system Telenor FoU Josef Noll Page 7 Propagation channel model

8 UMTS system Telenor FoU Josef Noll Page 8 Parameters for link level simulations Basic simulation parameters Mapping of the considered services Long constrained delayed services Unconstrained delayed services

9 UMTS system Telenor FoU Josef Noll Page 9 Link level specifications CSELT UMTS link level simulator, copyright: CSELT & EURESCOM P921

10 UMTS system Telenor FoU Josef Noll Page 10 BER results and capacity evaluation

11 UMTS system Telenor FoU Josef Noll Page 11 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.

12 UMTS system Telenor FoU Josef Noll Page 12 Application testing Link level simulator Off-line program Application server Application client Layer 1 error pattern Layer 7 error pattern Error insertion QoS assessment FDD mode

13 UMTS system Telenor FoU Josef Noll Page 13 Link performance evaluation FDD mode Downlink Voice service (8 kbit/s) Working point: Eb/No BER=0.1% as a function of mobile speed and propagation environment

14 UMTS system Telenor FoU Josef Noll Page 14 Link performance evaluation TDD mode Downlink (1 user per slot) Voice service (8 kbit/s) Channel : vehicular A BER vs. Eb/No and mobile speed

15 UMTS system Telenor FoU Josef Noll Page 15 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

16 UMTS system Telenor FoU Josef Noll Page 16 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

17 UMTS system Telenor FoU Josef Noll Page 17 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 Termina l Channel parameters Services Performances

18 UMTS system Telenor FoU Josef Noll Page 18 System level simulation results

19 UMTS system Telenor FoU Josef Noll Page 19 System level results: ETSI FDD

20 UMTS system Telenor FoU Josef Noll Page 20 Critical issues, example Radio planning in a 10 MHz setup UMTS adjacent channel reduction - 33 dB Power low for radio wave propagation: P 1 /P 2 ~ (d 2 /d 1 ) 3 Assume: Macro cell range d 1 = 1 km --> blind zone d 2 = 70 m Blocking of macro-cells through neighbour micro- cells d1d1 d2d2

21 UMTS system Telenor FoU Josef Noll Page 21 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


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