All rights reserved © 2001, Alcatel, Paris.

ITG-Fachgruppe „IP und ITG-Fachgruppe „IP und Mobility“Mobility“Kamp-Lintfort, 20 June Kamp-Lintfort, 20 June 20012001

Multistandard Radio Access Network

for Wireless IP Environments

Ulrich BarthAlcatel Research & Innovation

Ulrich.Barth@alcatel.de

All rights reserved © 2001, Alcatel, Paris.Ulrich Barth, Stuttgart, June 2001, page n° 2  »

Multistandard RANMultistandard RAN

Wireless InternetWireless Internet

Today’s Radio Technologies have to evolve to meet Wireless Internet Requirements

All rights reserved © 2001, Alcatel, Paris.Ulrich Barth, Stuttgart, June 2001, page n° 3  »

Multistandard RANMultistandard RAN

‘Multistandard’ RAN today

Multimodehandset

Circuit CoreNetwork

IPNetwor

k

2G/3G GGSN2G/3G SGSN

GPRSbackbone

2G/3G MSC/VLR

BSC

TC

MBS

MBSUMT

S

UMTS

EDGE

Iu(PS)

GSMEGPRSUMTS

BTS

RNC

Gb

A

Iu(CS)

All rights reserved © 2001, Alcatel, Paris.Ulrich Barth, Stuttgart, June 2001, page n° 4  »

Multistandard RANMultistandard RAN

RNC

Traffic forwarding/switching

Traffic concentrationTNL

Today’s Radio Network Controller: What is it doing?

RNL

User

Radio Processing (DHO)

Layer 2 termination

Mobility anchor point

RNL Control

Radio Bearer Control

UE Control

Radio Resource Control

All rights reserved © 2001, Alcatel, Paris.Ulrich Barth, Stuttgart, June 2001, page n° 5  »

Multistandard RANMultistandard RAN

Core Network

Iu

Iur

D/C-RNC

Node B Node B

Iub

S-RNCRNC

D/C-RNC

Node BNode B

•Gateway to Core Network•Mobility anchor point•UE Control •Dedicated channels: Ciphering, RLC, MAC-d, DHO•Shared channels: Ciphering, RLC, MAC-d

Serving

•Cell and Node B Resource Management

Controlling

•Dedicated channels: TNL switching•Shared channels: MAC-c/sh•Traffic concentration

Drift

Today’s Radio Network Controller: Three roles in 3GPP Specification

All rights reserved © 2001, Alcatel, Paris.Ulrich Barth, Stuttgart, June 2001, page n° 6  »

Multistandard RANMultistandard RAN

Improvements for existing Radio Systems

new modulation schemes for higher data rates

new channel types for packet services

selection of best suited air interface

new Radio Access Network Architecture

for better support of high speed packet data

for better integration of multiple radio standards

All rights reserved © 2001, Alcatel, Paris.Ulrich Barth, Stuttgart, June 2001, page n° 7  »

Multistandard RANMultistandard RAN

Radio Access Network Architecture

Based on IP Technology

Distributed Server approach

Open Interfaces

Hierarchical Mobility

Common RAN resources across standards

Load balancing

All rights reserved © 2001, Alcatel, Paris.Ulrich Barth, Stuttgart, June 2001, page n° 8  »

Multistandard RANMultistandard RAN

Internet

PSTN

Multistandard Nodes

Access GW

Radio Access Network

Terminals

Core Network

Applications

IP BackboneIP Backbone

Independence of core and access networks

enables a separate evolution of both

All rights reserved © 2001, Alcatel, Paris.Ulrich Barth, Stuttgart, June 2001, page n° 9  »

Multistandard RANMultistandard RAN

IP Network for RAN Transport

Use of IP Protocols instead of ATM in UTRAN

Layer 2 independent

UDP/IP address for User Flow Identification

Use of Header Compression techniques for efficiencySimulation Results from IST Wineglass Project show that IP transport can be more efficient than ATM/AAL2

With IP based architecture higher gains from statistical

multiplexing

All rights reserved © 2001, Alcatel, Paris.Ulrich Barth, Stuttgart, June 2001, page n° 10  »

Multistandard RANMultistandard RAN

Split of Control and User Plane Split Monolithic Network Elements (e.g. RNC)

remove single points of failureseparate evolution of user and control planeuse of standard control server platforms

Distributed architectureenables load balancing and enhanced scalabilityuse of server pools to guarantee reliability

All rights reserved © 2001, Alcatel, Paris.Ulrich Barth, Stuttgart, June 2001, page n° 11  »

Multistandard RANMultistandard RAN

Split of Control and User Plane OpenRAN architecture as discussed in MWIF

Radio Controller

BTS Bearer plane

Signalling plane

Cell Bearer Gateway

Paging-Broadcast

Mobile CtrlFunctions

Micro M Anchor

UE GEO Location

Cell Controller

Radio L1User Radio

Gateway

All rights reserved © 2001, Alcatel, Paris.Ulrich Barth, Stuttgart, June 2001, page n° 12  »

Multistandard RANMultistandard RAN

Mobility aspects

IP based core networkIP based OpenRAN

IP micromobility

URG

URG

IP micromobility

URG

URG

radiomobility

IP macromobility

All rights reserved © 2001, Alcatel, Paris.Ulrich Barth, Stuttgart, June 2001, page n° 13  »

Multistandard RANMultistandard RAN

Mobility aspects introduction of IP based mobility management in

the RAN, e.g. HMIP, Cellular IP no fixed assignment between RAN servers and

radio cellsrelocation of server functions independent of user

mobilityrelocation based on QoS requirements and load

balancing principles

All rights reserved © 2001, Alcatel, Paris.Ulrich Barth, Stuttgart, June 2001, page n° 14  »

Multistandard RANMultistandard RAN

Common O&M Common Network

Elements Radio Resource

Management

information collection

multistandard RRM

algorithms

access network selection

IP Core Network

UMTSOpenRAN

GSMOpenRAN

HiperlanOpenRAN

MultistandardRRM

duringhandover /connection

set up

•location•velocity•QoS requirements•radio interfaces

•load•services•price•coverage