Hamid Aghvami, King s College Markku Kojo, University of Helsinki Mika Liljeberg, N o k i a R e s e a r c h C e n t e r

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1 T h e A r c h i t e c t u r e o f t h e B R A I N N e t w o r k L a y e r R o b e r t H a n c o c k, Siemens / R o k e M a n o r R e s e a r c h Hamid Aghvami, King s College Markku Kojo, University of Helsinki Mika Liljeberg, N o k i a R e s e a r c h C e n t e r Page 1

2 at the IST Mobile Summit overview services network layer air interface Broadband radio access for IP-based Networks () BRENTA - Supporting Mobility and QoS for Adaptable Multimedia Communication The architecture of the Network Layer A first evaluation of IP based network architectures Enhancements for HIPERLAN/2 interface Air Interface support QoS in Wireless Communications First performance Results of Session 1C: 4G Networks Session 4B: Mobile Multimedia Session 5C:Mobile IP Session 2C: Converged Networks Session 1A: Local Area Networks Page 2

3 Scope of the Network Layer Internet Applications TCP/IP Protocol Stack with enhanced mobility support Radio Layers Mobile Node (MN) Custom IP Forwarding Radio Layers Scope of the Network Layer Access Router (BAR) "IP Based" Access network supporting QoS and seamless micromobility Link Layers Mobility Gateway (BMG) To IP Core Networks S u p p o r t i n g s t a n d a r d a n d e n h a n c e d a p p l i c a t i o n s i n t h e M N ( B R E N T A ) Building on any air interface (initially HiperLAN / 2 ) A t t a c h i n g t o s t a n d a r d IP fixed core networks ( T h e I n t e r n e t ) I n t h e a c c e s s n e t w o r k, Fully IP Based (whatever this means ) Page 3

4 T h e N e t w o r k L a y e r P r o b l e m f o r What it is (within the Access Network): H a n d o v e r s u p p o r t ( f a s t, s m o o t h, s e a m l e s s e t c. e t c. ) Q u a l i t y o f S e r v i c e s u p p o r t Admission control & pre-emption Negotiation with applications (Billable) Guarantees A p p l i c a b l e i n p u b l i c a n d p r i v a t e e n v i r o n m e n t s We are looking for self-contained solutions w h i c h s i m p l i f y t h e m o b i l i t y p r o b l e m f o r o t h e r p r o t o c o l s What it is not: Yet another set of options for Mobile IP/IPv6 Page 4

5 Design Principles (or, What Is IP-Based? ) N e t w o r k T r a n s p a r e n c y The End to End Principle as applied to Mobile Wireless Networks What Goes In, Must Come Out N e t w o r k I n d e p e n d e n c e Support v4/6 & use any subnetwork type O b e y t h e L a y e r M o d e l Keep efficiency without the stovepipe s o l u t i o n s o f 2 / 3 G E n a b l e & e n c o u r a g e f u t u r e e v o l u t i o n Means component independence S o l v e o n l y t h e s p e c i a l p r o b l e m s o f Mobile Wireless Access Leave the fixed network to the IETF, and contribute mobile wireless parts there BAR 'Stupid looking' network Connectionless QoSassured IPv4/v6 packet delivery BMG IP Core Hosts using standard IP protocols IP packets sent to and received from terminal, unchanged by network Page 5

6 K e y N e t w o r k L a y e r C o m p o n e n t s Control Plane Functions (AAA, CAC, RRM...) IP Network MN BAR Access Network BMG IP Network Correspondent Application BMG End to end application flow (transparent to traversed networks) ESI BRIAN SI E2E Quality of Service (e.g. RSVP) and Macro-Mobility (e.g. Mobile-IP, SIP) Signalling Transport Universal terminal - network signalling protocols Network IP2W IP2W Air i/f BAN network QoS & micromobility Link/Physical Page 6

7 F u n c t i o n S p l i t i n t h e M o b i l e N o d e Layer 2.5 : Convergence Core Optional Application Layer Upper Layer Service Interface Transport Layer (TCP, UDP) IPv4 Network Layer (IP, ICMP, IGMP) Address Resolution (ARP, InARP,...) IPv6 Network Layer (IP, ICMPv6, ND,...) Framing (e.g. IP over Ethernet) Link Layer Specific Convergence (e.g. HiperLAN Type 2 CPCS and SSCS) Link Layer IP 2 W IP 2 W: recommendation s for wireless link layers (pilc) Interface Control Data Configuration Error Control Management Address Management Buffer Management QoS Control QoS Support Handover Control Segmentation & Reassembly Idle Mode Support Header Compression Security Management Multicast Preserve layering Allow TCP/IP to be wireless/mobile aware Show how link layer can be T C P / I P f r i e n d l y Be universal IP 2 W everywhere Convergence link specific Be efficient L i n k l a y e r c a n o p t i m i s e L 3 p r o c e d u r e s ( m o v e d e t e c t i o n, a d d r e s s m a n a g e m e n t ) Page 7

8 Micromobility and Quality of Service Manage fast/smooth handovers within the BAN A B A N c a n b e big, and support many radio technologies Don t enforce a single macromobility protocol Adapt protocols to BAN requirements Common air i/f, transparency, idle mode, scalability (Billable) QoS requires negotiation & CAC At air interface and probably terrestrial side as well Tied to radio resource optimisation & route selection If you want QoS, it has to be considered alongside mobility handling within the BAN Page 8

9 N e x t S t e p s IP2W specification and design Encourage radio WP to design convergence function Determine MN-BAR protocols for µmm & Q o S Adaptation and integration of selected BAN µ MM & QoS protocol[s] Detail security support required in control plane Interface to AAA functions, MN-BAN security requirements for signalling Develop framework for integration with radio resource management Page 9

Background: Cellular network technology

Background: Cellular network technology Overview 1G: Analog voice (no global standard ) 2G: Digital voice (again GSM vs. CDMA) 3G: Digital voice and data Again... UMTS (WCDMA) vs. CDMA2000 (both CDMA-based)