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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
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
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)
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
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
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
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
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
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
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
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
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
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
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
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