1. All rights reserved © 2001, Alcatel, Paris. ITG-Fachgruppe „IP und Mobility“ Kamp-Lintfort, 20 June 2001 Multistandard Radio Access Network for Wireless IP Environments Ulrich Barth Alcatel Research & Innovation Ulrich.Barth@alcatel.de

2. All rights reserved © 2001, Alcatel, Paris. Ulrich Barth, Stuttgart, June 2001, page n° 2 » Multistandard RAN Wireless Internet  Today’s Radio Technologies have to evolve to meet Wireless Internet Requirements

3. All rights reserved © 2001, Alcatel, Paris. Ulrich Barth, Stuttgart, June 2001, page n° 3 » Multistandard RAN  ‘Multistandard’ RAN today Multimode handset Circuit Core Network IP Network 2G/3G GGSN 2G/3G SGSN GPRS backbone 2G/3G MSC/VLR BSC TC MBS UMTS EDGE Iu(PS) GSM EGPRS UMTS BTS RNC Gb A Iu(CS)

4. All rights reserved © 2001, Alcatel, Paris. Ulrich Barth, Stuttgart, June 2001, page n° 4 » Multistandard RAN  Traffic forwarding/switching  Traffic concentration TNL  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

5. All rights reserved © 2001, Alcatel, Paris. Ulrich Barth, Stuttgart, June 2001, page n° 5 » Multistandard RAN Core Network Iu Iur D/C-RNC Node B Iub S-RNC RNC D/C-RNC Node 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

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

7. All rights reserved © 2001, Alcatel, Paris. Ulrich Barth, Stuttgart, June 2001, page n° 7 » Multistandard RAN  Radio Access Network Architecture  Based on IP Technology  Distributed Server approach  Open Interfaces  Hierarchical Mobility  Common RAN resources across standards  Load balancing

8. All rights reserved © 2001, Alcatel, Paris. Ulrich Barth, Stuttgart, June 2001, page n° 8 » Multistandard RAN Internet PSTN Multistandar d Nodes Access GW Radio Access Network Terminals Core Network Applications IP Backbone  Independence of core and access networks  enables a separate evolution of both

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

10. All rights reserved © 2001, Alcatel, Paris. Ulrich Barth, Stuttgart, June 2001, page n° 10 » Multistandard RAN  Split of Control and User Plane  Split Monolithic Network Elements (e.g. RNC) remove single points of failure separate evolution of user and control plane use of standard control server platforms  Distributed architecture enables load balancing and enhanced scalability use of server pools to guarantee reliability

11. All rights reserved © 2001, Alcatel, Paris. Ulrich Barth, Stuttgart, June 2001, page n° 11 » Multistandard 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 Ctrl Functions Micro M Anchor UE GEO Location Cell Controller Radio L1 User Radio Gateway

12. All rights reserved © 2001, Alcatel, Paris. Ulrich Barth, Stuttgart, June 2001, page n° 12 » Multistandard RAN  Mobility aspects IP based core networkIP based OpenRAN IP micro mobility URG IP micro mobility URG radio mobility IP macro mobility

13. All rights reserved © 2001, Alcatel, Paris. Ulrich Barth, Stuttgart, June 2001, page n° 13 » Multistandard 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 cells  relocation of server functions independent of user mobility  relocation based on QoS requirements and load balancing principles

14. All rights reserved © 2001, Alcatel, Paris. Ulrich Barth, Stuttgart, June 2001, page n° 14 » Multistandard RAN  Common O&M  Common Network Elements  Radio Resource Management  information collection  multistandard RRM algorithms  access network selection IP Core Network UMTS OpenRAN GSM OpenRAN Hiperlan OpenRAN Multistandard RRM during handover / connection set up location velocity QoS requirements radio interfaces load services price coverage