ITUT System Architecture for IPbased Seamless and Ubiquitous
ITU-T System Architecture for IP-based Seamless and Ubiquitous Networks Shiro Sakata NEC Laboratories sakata@cd. jp. nec. com 25. 09. 20209 -10 July 2003 Workshop on Next Generation Networks: What, When & How? 1
1. Network and IT Market Trend ITU-T 2. System Architecture for Ubiquitous Services - Ubiquitous Platform - 3. Application to Wireless & Mobile Networks 4. Application to Photonic & Broadband Networks 5. Standardization Issues 6. Conclusions 25. 09. 20209 -10 July 2003 Workshop on Next Generation Networks: What, When & How? 2
1. Network and IT Market Trend ITU-T - Value shifts from core to user, network to services - New business opportunities with network and service integration caused by deregulation ・Unbundling network resources & functions and then on-demand rebundling them in a multi-carrier environment - Emerging ‘Dynamic Collaboration’ in enterprise systems through the integration of IT and network technologies - Versatile service support in a ubiquitous network environment ・Requirement for adaptation to a wide variety of networks and terminals ・Networks: Wired broadband wireless networks (wireless LAN, cellular network, adhoc personal area network, sensor network) Terminals: PC, digital home appliances/digital TV/home server, PDA, cellular phone, wearable terminal, embedded car terminal 25. 09. 20209 -10 July 2003 Workshop on Next Generation Networks: What, When & How? 3
Potential New Business Model by Network Unbundling & Rebundling ITU-T Interoperability between different operators and dynamic network resource allocation Networks dedicated to individual operators and user services Operators B - NW resource virtualization and brokerage - Service continuity and portability - NW security and e. g, Virtual Network Operator(VNO) traceability Storage service Web service - Policy management logical NW. . . …. Content delivery logical NW Operators A Other ubiquitous Service logical NW Unbundling Operator B Operators C Operator A Traditional Network (Bundled network resources) 25. 09. 20209 -10 July 2003 Operator C Future Network (Resource rebundling adapted to individual services) Workshop on Next Generation Networks: What, When & How? 4
ITU-T Business activities in which an enterprise enhances its own core competence and reacts dynamically to drastic changes through the flexible collaboration with partners Development partner Next Generation Management Style Self-support of all functions Enterprise A Joint productization, Technology sharing Joint productization Core competence Outsourcing (R&D,Planning, Production) Realtime info. sharing, Inventory management Logistics partner 25. 09. 20209 -10 July 2003 Customers Realtime Info. sharing Order management Business function outsourcing Sales partner Workshop on Next Generation Networks: What, When & How? 5
Dynamic Collaboration through IT and NW Integration - Multivendor Support for Customer System - ITU-T - 24 hours, 365 days system support and on-demand bandwidth utilization - Remote conference system with tele-existence/virtual reality capability Broa dban d VPN Head office IP Network From overseas Alliance partner 25. 09. 20209 -10 July 2003 Mo bile VP N Call Center Distributed & Collaborative AP Customer Window DB Support Center VL AN VP N Vo. IP WEB I/F Maintenance Center Customer Web Remote maintenance VLAN: Virtual LAN Workshop on Next Generation Networks: What, When & How? 6
Ubiquitous Services over Versatile Networks & Terminals ITU-T Electronic Ticketing Content Delivery Location/Presence Info. Service Ubiquitous Services Home Control and Security (*) ‥‥ Bidirectional Communication (*) Storage Service Versatile networks Servers Terminals FTTH Wired LAN 25. 09. 20209 -10 July 2003 PDA Laptop PC Core Network Wireless LAN Cellular phone MAN(Wide area Ether) ADSL Wearable Terminal Home appliance IMT‐ 200 0 Wireless LAN Digital TV Home server Sensors Car terminal Workshop on Next Generation Networks: What, When & How? : 7
Bidirectional Communication On the move ITU-T Public Wireless LAN Office User 25. 09. 20209 -10 July 2003 Workshop on Next Generation Networks: What, When & How? Home User 8
Home Control and Security o Robot-type Home server ITU-T • User controls robot from outside through the Internet • The robot controls home appliances with Ir. DA, RFID, etc. • The robot automatically acts in accordance with user’s presence Light HDTV and HD Video recorder Example: On the travel or on the way back home - Confirmation of door locking - Monitoring and taking care of pets, gardens, etc. - Automatic video recording - Warming bath when approaching the home - Automatic switching-on of lights when approaching the home Maid robot Door lock and door phone Feeding Internet 25. 09. 20209 -10 July 2003 Warming bath Workshop on Next Generation Networks: What, When & How? 9
2. System Architecture for Ubiquitous Services [Network Technology Trend] ITU-T - Increasing requirements for guaranteed multimedia services in transition to all IP networks ・Video streaming by CDN (Content Delivery Network), IP phone, Digital broadcast (data broadcast), etc. - Higher-flexible and lower-cost enterprise systems ・VPN(IP, SSL), wide area Ethernet - Requirements for ‘Robust & Secure’ open mission critical system emerging into distributed wide-area business environment - Emerging wireless LAN and interworking with 3 G cellular and other networks for supporting versatile ubiquitous services - ‘Context Awareness’ is a key term in ubiquitous services ・context includes user’s situation such as location, presence, preferences, various sensed data, etc. - Requirements for Vo. IP as a short-term killer application ・End-to-End Qo. S, e. g. small delay, low jitter, guaranteed bandwidth ・Context transfer for network-network roaming 25. 09. 20209 -10 July 2003 Workshop on Next Generation Networks: What, When & How? 10
[Design Principles] ITU-T 1. From best-effort to high-quality support in response to individual service requirements 2. Seamless service continuity in mobile and muti-network/carrier environments 3. End-to-end enhanced robustness and security in an open network environment Ubiquitous platform as middleware - enabling on-demand network resource allocation between different operators - providing robust & secure capability adapted to individual services 25. 09. 20209 -10 July 2003 Workshop on Next Generation Networks: What, When & How? 11
Ubiquitous Platform (1) Application-Network Collaboration ITU-T - Dynamic network resource management and allocation as requested by individual applications ・Load balancing and dynamic routing control ・Common API(Application Programming Interface) for accepting application requests and network control interface for network resource management (2) Network-Network Collaboration - Seamless interoperability between different operators ・Roaming: service portability, common authentication (single sign-on), etc. ・Media handover: low latency handover, audio & video quality assurance - End-to-end network control ・GMPLS/ASON, NNI/UNI (3) Network Traceability - End-to-end traceability ・Enhancing robustness against cyber attacks and system faults through TCP session management 25. 09. 20209 -10 July 2003 Workshop on Next Generation Networks: What, When & How? 12
Ubiquitous Platform Location/Presence Info. Service Electronic Ticketing ITU-T Ubiquitous Services Home Control and Security ‥‥ Content Delivery Bidirectional Communication Storage Service (1) Application-Network Collab. API Server Network node (Router, Switch, etc. ) Ubiquitous Platform NCI (Network Control I/F) Versatile networks Servers Core (2) Network-Network Collab. Network Wireless LAN Terminals FTTH Wired LAN 25. 09. 20209 -10 July 2003 Terminal MAN(Wide area Ether) ADSL IMT‐ 2000 Wireless LAN (3) Network Traceability Cellular phone PDA Laptop PC Wearable Terminal Home appliance Digital TV Home server Sensors Car terminal : Workshop on Next Generation Networks: What, When & How? 13
(1) Application-Network Collaboration ITU-T Background: - Requirements for user service flexibility such as on-demand network resource control, e. g. bandwidth, session path, etc. , have been increasing. Required technologies: - Enabling user service to submit requirements to network in a heterogeneous operator environment - Easing of tight coupling between a user service and the network control functions provided by the network operator ・Facilitating load balancing regardless of user service location ・Optimizing the network resource selection and allocation adapted to user requirements 25. 09. 20209 -10 July 2003 Workshop on Next Generation Networks: What, When & How? 14
(1) Application-Network Collaboration Allowing to select best-effort or guarantee on-demand for each service ITU-T Servers Internet connection Terminals Vo. IP CDN VPN ... API Mobile phone /PDA PC/Home appliance Sensor Ubiquitous Platform Service requirements Virtualization of network resource management to services Instruction to networks regarding resource allocation Router with ubiquitous platform Wide-area SONET Ether FTTH Networks 25. 09. 20209 -10 July 2003 Conventional router ADSL PDC IMT 2000 – Wireless – – LAN – Existing operators New common carriers Mobile carriers ... NCI (Network Control Interface) Workshop on Next Generation Networks: What, When & How? 15
(2) Network-Network Collaboration ITU-T Background: - Service portability and continuity, e. g. , providing seamless roaming and handover in a wireless environment, will be achievable through the operator-to-operator collaboration Required technologies: - Network resource management for each session ・Handover while holding network resources in an end-to-end session without content quality degradation - High-speed network switching through context transfer ・Exchanging network and service attribute information including user authentication information between different operators 25. 09. 20209 -10 July 2003 Workshop on Next Generation Networks: What, When & How? 16
(2) Network-Network Collaboration ~ Assuring Service Portability and Media Handover ~ ② Confirmation of Service Continuity ITU-T (Access rights, Resource, etc. ) ① Acquisition of Access Network A’s Attribute ・Bandwidth ・AV coding ・Authentication ・Security level etc. Operator A Dual-mode phone e. g. , Wireless LAN 25. 09. 20209 -10 July 2003 ③ Context (Session Info. ) Transfer Negotiation Roaming in Transport Level Move ④ Resource Allocation Operator B ⑤ Restart based on Access Network A’s Attribute in Access Network B e. g. , 3 G Cellular Workshop on Next Generation Networks: What, When & How? 17
Transition from Unbundling to Rebundling of Network Resources ITU-T Operator A resources Operator X …. + resources Resources are bundled Unbundle API NCI decomposed For service B Rebundle for each service For service Y 25. 09. 20209 -10 July 2003 with resource negotiation/brokerage, and resource management virtualization to services Workshop on Next Generation Networks: What, When & How? 18
(3) Network Traceability ITU-T Background: - IP packet level monitoring has been becoming impossible because of explosive traffic increase. TCP session level, for example, monitoring is expected to enhance the security in terms of traceability of attack sources, i. e. to facilitate the attack source identification. Required technologies: - One of the possible solutions: Segmentation of an end-toend TCP session into multiple TCP sessions and traffic monitoring and access control at concatenation points. - Session access control at concatenation points enables the protection from cyber attacks including Do. S(Denial of Service) attacks before such attacks reach the end user node. 25. 09. 20209 -10 July 2003 Workshop on Next Generation Networks: What, When & How? 19
(3) Network Traceability ITU-T - Quick Trace and Identification of Source of Attacks or Faults ・Traffic monitoring and tracing TCP session by session, not IP packetwise - Shut-out of Attack or Fault-caused Traffic assuring Service Survivability Session Admission Control Quick Trace and Identification of Source of Attacks or Faults TCP Relay Network IDC Connection Setup IDC Attacker Unsuccessful Connection in case of Fraud IP 25. 09. 20209 -10 July 2003 Session concatenation point Attacker Unknown Intrusion Pattern Detection Workshop on Next Generation Networks: What, When & How? 20
3. Application to Wireless & Mobile Networks All IP Architecture (3 GPP) ITU-T Circuit-switched Communication CS Domain Mobile Switch Server Wireless Access (Cellular, Wireless LAN) PS Domain IMS (IP Multimedia Subsystem) GW Switch Server MGW Mobile Packet Server (SGSN) HSS (HLR+AAA) MGW IP backbone SIP Server MGW Controller GW Packet Server (GGSN) ISDN /PSDN Data Communication Internet Signaling GW Application Server CS: Circuit Switched PS: Packet switched Workshop on Next Generation Networks: What, When & How? 25. 09. 20209 -10 July 2003 21
Integration of 3 G and Wireless LAN ITU-T Communication area, Mobility, Portability High speed, High quality 3 G Content Provider ISP Internet Access Enterprise Network VPN Wireless LAN ASPs Content Delivery User info. , Authentication, Accounting Internet 3 G Service area Hotel Station Cafe Airport Public Space :Hotspot 25. 09. 20209 -10 July 2003 Workshop on Next Generation Networks: What, When & How? 22
Integration Scenarios discussed in 3 GPP Feasible solutions in mid-term ITU-T ・Scenario 1: Common Billing and Customer Care ・Scenario 2: 3 GPP system based Access Control and Charging ・Scenario 3: Access to 3 GPP system PS based services ・Scenario 4: Service Continuity ・Scenario 5: Seamless Services ・Scenario 6: Access to 3 GPP CS Services 25. 09. 20209 -10 July 2003 Workshop on Next Generation Networks: What, When & How? 23
3 G - WLAN Interworking Scenarios ITU-T 1 - Security level of 3 G and WLAN are independent - No new requirements on 3 G spec. 2 - AAA are provided by 3 G system, e. g. EAP (EAP-AKA for GPRS/USIM and 3 - Operators grants access to 3 G PS based services through WLAN - Service continuity between 3 G and WLAN is not required - IMS based/location based/instant messaging/presence based services 4 - Handover for specific services - Change of service quality in mobility across 3 G and WLAN - Both service continuities between 3 G & WLAN and WLANs 5 EAP-SIM for GSM/SIM) is used for authenticating user by 3 G server - Reuse 3 G access control and charging principles (HSS/HLR, etc. ) for the benefit of 3 G system operators and users - Seamless service continuity and handover - Non-real-time services: Mobile IP - Real-time services: Fast Mobile IP protocols, Context Transfer protocol, Access Router discovery schemes 6 25. 09. 20209 -10 July 2003 - Grant access to 3 G CS based services through CSed WLAN access Workshop on Next Generation Networks: What, When & How? 24
Wireless LAN Solution Example ITU-T (1) Plug & Service - On-site real-time service download to mobile terminal - Service description/registration/retrieval/discovery/creation (2) Seamless Roaming - Service roaming achieving WLAN(Hotspot)-WLAN or WLAN-3 G service continuity and eventual fast handover - Authentication roaming achieving single sign-on in a multi-network (WLANs and 3 G) environment (3) Privacy Protection - Utilization of user profile information for personalized services - Privacy information description/negotiation/protection based on W 3 C P 3 P (Platform for Privacy Preferences) WLAN: Wireless LAN 25. 09. 20209 -10 July 2003 Workshop on Next Generation Networks: What, When & How? 25
Public Wireless LAN Solution Image ITU-T 3 G service area dualmode Service Providers … Mobile Terminal Content Server Wireless LAN Local Server IP Network Wireless LAN Mobile Terminal Laptop PC, PDA, etc. 25. 09. 20209 -10 July 2003 Application Server Access Point Hotspot (Station, Airport, Train, Hotel, Restaurant, Café, etc. ) Local Server including local content : ISP Server Workshop on Next Generation Networks: What, When & How? 26
Middleware Architecture for Wireless LAN Solution ITU-T Local Server (Access Point) Mobile Terminal Remote Server (Applications & Content) Applications & Content API - Plug & Service Middleware - Seamless Roaming - Plug & Service Protocols - Privacy Protection - Seamless Roaming - Privacy Protection NCI IP OS & Devices CSMA/CA (IEEE 802. 11) Wireless LAN 25. 09. 20209 -10 July 2003 OS & Devices IP 3 G, ADSL/FTTH OS & Devices IP Network Workshop on Next Generation Networks: What, When & How? 27
4. Application to Photonic & Broadband Networks o ITU-T o Network/Transport functions need to be seamlessly controlled from services such as bandwidth on demand VPN ASON plays an important role for dynamic network resource assignment Service Support Bandwidth on Demand, VPN Network Design Support Network Design/Optimization, Full Turnkey Service, Customization Operation Support Rapid Provisioning, Multi-Vendor Interoperability Other Network Function ASON Networking Software (NMS, EMS, NNI, GMPLS, UNI, NE Software, etc) Integrated Protection Management Service Distribution Ethernet Transport Service Qo. S SLA Plug & Play Multi. Service Transport Wavelength Transport Service Core Network ASON: Automatic Switched Optical Network 25. 09. 20209 -10 July 2003 Workshop on Next Generation Networks: What, When & How? 28
5. Standardization Issues rol in t n o c k r two ITU-T - Ne terface OIF - Content caching, content adaptation (CDN) - Network control interface ITU - SIP, Presence service (SIMPLE) IETF - Wireless-profiled TCP - Security (AAA, PANA) - Mobile IP - GMPLS gement a n a m. o f in - Location ts management (DRM) OMA - Digital righ - Security (802 3 GPP/ - Roaming (802. 11 i, 1 x/EAP) 3 GPP 2 - Qo. S control(8. 11 f) 02. 11 e) - Priv IEEE 802. 11 - We acy pro t b e c ti - x. H servic TML e (X on (P 3 P) ML, SOA P, U Digital broadcast DDI ) - x. HTML W 3 C ATSC ARIB DVB (US) 25. 09. 20209 -10 July 2003 (Japan) (Europe) Workshop on Next Generation Networks: What, When & How? 29
6. Conclusions ITU-T - Deregulation-caused potential new business opportunities ・On-demand network resource control for individual services - ‘Dynamic Collaboration’ for future enterprise environment - Support for wireless network-involved ubiquitous services - End-to-end robust and secure capability enhancements Ubiquitous Platform All IP network - Wireless LAN - 3 G - GMPLS optical network : 25. 09. 20209 -10 July 2003 Workshop on Next Generation Networks: What, When & How? 30
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