Views on Wireless Network Convergence

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1 Views on Wireless Network Convergence Yan PENG, Bin XIA, Meng LIANG Version 1.0

2 Agenda Motivations for Wireless Network Convergence Convergence Categories Issues on IP based Convergence A Possible Evolution Strategy 2

3 Future Wireless Communications User centric wireless world providing ubiquitous services Anywhere Whenever Whoever Whomever Any means WiMax, wireless broadband 3G/LTE/AIE/B3G HSxPA Bluetooth UWB Zigbee WiFi 2.5G Source: 1Q 2005 Gartner 3

4 Application Scenario (I): User Moving in Wireless World Consortium #n Mobile Operators ISPs Carriers Enterprise Isolated actors Enterprise Networks xdsl, CDN,... xdsl P2P Community Home Networks IP Backbone (e.g. Internet) Mobile Operators Virtual WISPs ISPs Carriers 2.5G 3G Hotspots Wireless MAN Hotspots Satellite Consortium #1 4

5 Application Scenario (II): Moving Networks Fixed hotspots Mobile Operators, ISPs, Carriers, etc. Fixed hotspots Mobile Operators, ISPs, Carriers, etc. 2.5G 3G Satellite 2.5G 3G Satellite GW Ad hoc Train, bus, etc. Train, bus, etc. Network Access via single Equipment Network Access via individual approach 5

6 Application Scenario (II): Virtue Moving Networks Fixed hotspots Mobile Operators, ISPs, Carriers, etc. 2.5G 3G Satellite GW Home PN 6

7 Challenges to Future Wireless Communications (I) Various User Requirements: Varieties of portable terminals Always best connected Demands for enjoying a wide variety of voice, data and multimedia services independently of their geographical location Higher performance requirements than today (higher bit-rate, lower delays, etc.) 7

8 Challenges to Future Wireless Communications (II) Requirements for evolution of network infrastructure: support for a huge number of connected terminals (phones, laptops, sensors on vehicles etc.) capacity to deliver an increasing amount of data traffic maximization of network coverage (ubiquitous service) efficient usage of network resources (radio access, backbone) support for always-on connectivity anywhere, in any mobility condition and with the best possible performance; minimization of the delays experimented by users in order to enable interactive services enable the offering of a wide variety of value added IP services, with a quality significantly better than today 8

9 Enabler against Challenges Now,We are here Diverse Wireless World Converged Wireless World Convergence of wireless/wired telecom world, informtainment, and information technology world 9

10 High Level Technique Issues for Wireless World Convergence How to support multiple access technologies, multiple administration domains How to support multiple kinds of services How to support seamless mobility How to implement efficient traffic delivery How to provide ubiquitous services 10

11 High Level Technique Requirements for Wireless World Convergence Convergence solutions rather than network innovation High reliability High scalability Optimized usage of network resources Minimization of e2e transfer delay for data packets Optimized support for always-on operation 11

12 Motivations for Wireless Network Convergence Convergence Categories Issues on IP based Convergence A Possible Evolution Strategy 12

13 Multiple Dimensional Convergence Categories Converged Architecture Converged Applications Converged Services Converged API Converged Networks Converged Spectrum or/and Converged Devices Converged Infrastructure 13

14 Layered Convergence Concept The lower layer where convergence occurs, the higher performance achieved. Different pairs of Networks may converged at different layer. Source: WWRF White Paper,

15 Convergence - Degree loose convergence-> tight convergence Common billing and customer care among involved networks Common access control and charging among involved networks Services sharing among involved networks Service continuity among involved networks Seamless services among involved networks Factors to convergence degree Operators agreements Capability of infrastructure and terminals etc. 15

16 Any options are possible ENABLE s view: converged networks on IP based transport and control layer at first stage => Efficient and operational mobility in large heterogeneous IP networks 16

17 Agenda Motivations for Wireless Network Convergence Convergence Categories Issues on IP based Convergence A Possible Evolution Strategy 17

18 Issues on IP based Convergence IP-based network control General network control policies of different domains Intra-technology Inter-technology Efficient control messages Minimization of signaling round trips Minimization of signaling overhead 2G Mobile operators 2.5G PTSN Satellite General IP-based network control 3G WMAN ISPs IP-based network Control Messages 18

19 Issues on IP based Convergence IP-based transporting Supporting efficiently transporting of traffic Transparent transporting traffic Across different IP version(ipv4/ipv6 IPv4 with NAT) Across different access technologies Without requiring users intervention 19

20 Issues on IP based Convergence IP-based routing and addressing Be enable to accommodate of a vast (and fast growing) number of users and terminals Implement IP addressing over heterogeneous networks Optimized Routing for specified service/network Internet Internet GPRS/UMTS Hotspot GPRS/UMTS Hotspot VoIP Browsing VoIP Browsing GPRS/UMTS Coverage Coverage GPRS/UMTS Coverage Coverage 20

21 Issues on IP based Convergence Communication Quality Guaranteed QoS E2E Mobility Fast handoff (e.g. for real-time non-reliable applications) Lossless handoff (e.g. for non/near real-time applications) Seamless handoff (e.g. for real-time reliable applications) Flexibly offered specified QoS according to different condition User profile Network loading Resource Usage Supporting of IP service Ability to effectively handle a variety of different types of IP traffic Real time/non-real time/mission critical/reliable End to End/End to Multicast/ Multicast to Multicast Service based access system selection: efficient usage of RR 21

22 Issues on IP based Convergence Security and Privacy Enhanced security and privacy Coordination of different Security and Privacy Policies of different network and operators Deployment Backwards compatible with legacy system Flexibility of deployment Smoothly convergence process 22

23 Agenda Motivations for Wireless Network Convergence Convergence Categories Issues on IP based Convergence A Possible Evolution Strategy 23

24 Evolution Strategy 0. With Mobile terminal evolvement, more and more terminals with multiple network interfaces appear 1. Implementation of an adaptation layer supporting part of transport layer convergence functions, such as seamless handover, without affecting existing legacy networks,. 2. Add convergence functionality to the adaptation layer, and make it mandatory to implement convergence on IP transport and control layer. 24

25 Step 0: Multi-mode Terminal Multi-mode terminal 3GPP GPP GPP 3GPP2 For ubiquitous service, the mobile node is capable of supporting multiple interfaces at the same time. 25

26 Step 1: Adaptation Layer Application Layer Service Layer Application Layer Service Layer IP-based Transport & Control Layer IP-based Transport & Control Layer Abstraction Layer Handover Control Link Layer PHY Layer 3GPP2 3GPP 802.x L1 & L2 An optional abstraction layer Perhaps Solve seamless handover problem only 26

27 Step 2: Extension of Abstraction Layer Application Layer Service Layer Converged IP Transport & Control Layer Access Selection Resource Monitoring Mobility Support Performance Monitoring Fine granularity service control IPv6 backbone Security and Privacy Enhanced user experience Multiple radio access technologies QoS (delay, speed) Enhanced network service Seamless mobility Optimized resource usage Network reliability Security Management... 3GPP2 3GPP L1 & L2 R R Cellular Access R DVB R Other Access Systems Converged networks on IP-based communication subsystem Layer A converged network example 27

28 Reference Enable Proposal Part B, V12.0, 2005 Enable Requirements and Scenarios, V1.2, 2006 S.R. Subramanya, Multiple Dimensions of Convergence Outcomes and Issues, WWRF15#,

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