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차세대 이동통신 액세스 네트웍 기술

차세대 이동통신 액세스 네트웍 기술. Oct. 2004. Song Pyeong Jung (pjsong@etri.re.kr). Topics. 1. 4. 2. 3. 5. Introduction. Seamless Mobility. Service Perspective. Access Network. R&D Areas in ETRI. Introduction (1/3). What is the IT839 Project ? ( 소스 : MIC)

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차세대 이동통신 액세스 네트웍 기술

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  1. 차세대 이동통신 액세스 네트웍 기술 Oct. 2004 Song Pyeong Jung (pjsong@etri.re.kr)

  2. Topics 1 4 2 3 5 Introduction Seamless Mobility Service Perspective Access Network R&D Areas in ETRI

  3. Introduction (1/3) • What is the IT839 Project ? (소스 : MIC) • Target : Achievement of $20,000 (IT $5,000, GNI) • Driving Forces : IT839 Project New Services (8) Infrastructure (3) Driving Engines (9) • 2.3GHz PIS • DMB (Sat/Ter) • Home Network • Tele-matics • RFID • W-CDMA • DTV • VolP • NG mobile comm. • Digital TV • Home network • IT SoC • Next generation PC • Imbedded S/W • Digital contents • Telematics • Intellectual robot • BcN • USN • IPv6

  4. Introduction (2/3) • Infra-structure • Three Main Infra will be constructed for u-Korea around 2010 U-Korea (Knowledge-based Society) Driving Engines New Services Integrated • BcN • Voice&data • Telecomm&Broadcast. • Wireline&Wireless • USN • - Thing -Thing • Person -Thing • Via RFID chips below 10 cents (2007) 20 million subs (2010) • IPv6 • Converged • Inter-woking Home Automation (High QoS & Data Rate) • 아날로그 중심 Conversion to IPv6 (2010)

  5. Introduction (3/3) Vision & Mission To Achieve the Ubiquitous Service Environments for u-Korea To Pursuit the Global Leading R&D Institute in IT Research Fields Target To Provide Commercial WiBro Service in 2006 To Build up a Initial 4G Testbed System in 2007 Access Network • IPv6 based Access Station • Multi-mode Base Station • Access Managers to support • E2E QoS, Inter-system Mobility • etc • Radio Technologies • HMm RF/Modem • HPi RF/Modem • Advanced W-LAN • MIMO/SA • RFID, Ad-hoc, Sensor • etc • Service & System • Vision and Service • Mobile Terminal Platform • Mobile Ad-hoc Networking • SDR Technologies • PIS as a pre-4G technology • Scope of NG Mobile Comm. • Vision and Target of NG R&D in ETRI

  6. Service Perspectives Terminology NG : B3G : 4G

  7. Evolution of Mobile Services • Service Evolution : 1D (telephony)  3D (rt mm) Multimedia Service Thing-to-Thing broadband & converged rt multimedia services - Mobile TV - Video Streaming Human-to-machinemultimedia communication - Multimedia Message - LBS Human-to-Humanmessaging Mobile Telephony Seamless Mobility - Wireless Internet - Download(Bell Sound) Ubiquitous Service Voice 1G 2G 3G 3.5G 4G

  8. Framework of B3G Services SL3 Life Business Voice Web ITS Communication SL2 QoS Handover Security SL1 • System and Service of B3G still not defined • B3G will be a service-driven and a human-oriented system • Define B3G service as a 3D model with three different levels : • Service Level 3 (8 categories): Service Areas categorizing SL2 • Service Level 2 (32 services) : Appl. Services utilizing SL1 • Service Level 1 (31 technologies): Network Functions (&Features)

  9. Multi-level Services of B3G • SL3 : Mobility • SL2 : Navigation, context-aware • SL3 : Downloading, Location-tracking, User-profile-handling technologies Business/Commerce Mobility/Traffic SL 3 (8 categories) Management/reservation mobile payment mobile advertisement Etc(6) Navigation context-aware positioning based guidance Etc(5) SL 2 (32 services) Level 1: Service Pools(31 items) Real time A/V streaming, VoIP, Handover, data transmission, profile transmission, multimedia download, multi-call/multi-session, request/answer type, authentication and authorization, context-based push, multimedia information broadcasting, location aware, location tracking, profile processing, network selection, mobile payment, ad hoc communication between user equipments, information/situation informing, user preference management, information security, sensor awareness, personal credit certification, equipment awareness, language and image processing, virtual home environment, trans-coding, codec download, channel QoS management, alarming, automatic formulation of a closed user group, anonymity guaranty. SL 1 (31 tech.) Communication Intelligent agent monitoring remote education etc(4) Voice moving picture web browsing Messaging etc(5) Life ITS (traffic signaling, alarm) mobile control center Satellite etc(3) Remote control Service(1) Emergency/ Disaster VoD situation adaptive multimedia Chatting etc(5) Telemedicine/ Health A pay broadcasting emergency news electronic voting etc(3) Leisure/Games Broadcasting/weather/Public

  10. Concept of 3D Service System Sys-C Sys-B Voice Web ITS Sys-A Service Oper-c Oper-b Oper-a Operator • Concept of 3D Service (소스 : ETSI) • Enabling a Always best connection in terms of cost or quality • Simultaneous Usage in Converged Access Networks • Flexible Combination Usage of Service : • (1Ser, 1Sys, 1 Op) - classical cellular • (2Ser, 2Sys, 1 Op) - cooperative • (1Ser, 1Sys, 0 Op) - classic Ad hoc Different bearer services supported by different systems Space of simultaneous use - classical Ad hoc use -

  11. Access Network - 기술 동향과 개발 사례 - • Technical Trends of Access Network • Examples of Access Network • Flarion/f-OFDM (USA) • ETSI/IST (EU) • IP2 (Japan)

  12. Trends of IP Access Network (2/2) • Evolution of Mobile Access Network from Generation Aspects • 1G : Analog Access Network • 2G : Digital Access Network • 3G : Digital Composite AN to Support Ckt and Pkt simultaneously • B3G : IP-based Open Multimedia Access Network • Evolution of Mobile Access Network from Technology Aspects • ATM/IP Transport RAN : Introduction of IP Tech. outside AN (AN-CN) • IP Transport RAN : Introduction of IP Tech. inside AN • Open/Distributed IP RAN : Introduction of All-IP • Evolution of Mobile Access Network from Architectural Aspects • Short-term : Independent AN by each Operator/Service (Interworking-level) • Mid-term : CN-centric AN(each AN as it is) • Long-term : AN-centric /Converged AN with Open & Distributed Architecture

  13. Trends of IP Access Network (2/2) • Example of Access Network Evolution in 3GPP • Current : Dedicated link with ATM • IP transport RAN : Networking with IP • IP RAN : IP transport RAN + Distributed functions (e.g. RNC/CNfunctions)  Evolution towards IP-based flexible arch. from ATM-based dedicated arch. * IP based RAN ? IP –infra based open arch.

  14. Example : f-OFDM (1/3) • f-OFDM Access Network Architecture – Short term(src : Flarion) • Provision of cellular services by IEEE-based architecture with mobility • Trial of paradigm change from CS Voice to PS Data centric architecture under Internet environments • Direct connection of f-OFDM AN to internet-infra (not via core network)

  15. f-OFDM (2/3) f-OFDM AN Servers (Audio) IETF Interface (T1) F-OFDM DS3 GE (1.25~5 MHz) MT Radio Router Multiple DS1 Edge Router IP Switch Servers (Game) 1 1 2 2 4 4 3 3 5 5 6 6 7 7 8 8 9 9 0 0 A A B B C C 1 1 D D 1 1 # # * * RF RF BS BS AR AR F-OFDM MT Radio Router • f-OFDM Test-bed Configuration • Radio Router = RF + BS (AN : BTS/BSC) + AR (subset of CN: FA/AAA/DHCP/OAM…) • Field Test with Traffic Gen. : Indoor (audio, game), Outdoor (ftp) • MT : Laptop computer (fMDM, intra-cell traffic, inter-cell interference) • Edge Router : Aggregate Router (controlled by HA) HA

  16. f-OFDM (3/3) • f-OFDM Handover Scenario Old-RR New-RR AAA HA MT • Situation : HO during FTP tx (serverMT) • Mobile Controlled Handoff • MIP-based Make before Break • FTP Download Example : 통신 Packet Switched Communication via Old RR(DL FTP Transfer from Server) (Old RR) Pilot Tone Pattern L2 Registration User 인증/암호화 AAA-Request (New RR) Authentication & Encryption Procedures (using EAP) New RR에서 해당가입자 인증 AAA-Reply(Rand,L2 keys, profile).. FA Advertigement(FAA) sib(S_ID) broad User 등록 Registration Request (RREQ) RREQ (New RR) add in table RREP Registration Reply (RREP) Context Transfer Request Inter-RR intf: User 프로화일 context protocol Transfer Context Transfer Update (add/drop) MIP Registration + PFANE (Previous FA Notification) MIP Reg+PFANE MIP 등록 MIP Registration Response (out of domain) fwarding table Binding Update Binding (redir: del, add) (New RR) Binding Update Response 통신 Packet Switched Communication via New RR (New RR)

  17. ETSI – IST (1/2) • 4G Access Network Configuration – Short term (src: IST) • Why take multi-mode approach ! • Operators own some RATs and cooperate with other NPs of the CR infrastructure • Goals is to improve capacity and QoS levels and is to reduce cost levels • Users are assigned to best radio access networks and technology

  18. ETSI – IST (2/2) • Access Network Configuration • with Reconfigurable Ubiquitous Terminal – Long term Reconfig. Env. • Components • Terminal : Reconfigurable to support different RATs • Access Point : No Inter-working but converged and reconfigurabie to support different RATs • Protocol stack : • AS : indepen. low-layers by each RAT • NAS : common & Flexible high-layers • AP is reconfigured by Network-level Reconfig. Env. (config. profiles DB/ SW repositories/ recofig. Manager) • Terminal is reconfigured by TRM (Terminal Reconfiguration Manager) including (reconfig. Gateway/ config. profile DB) Reconfig. BS Reconfig. MT.

  19. IP2(1/3) • IP2 Arch for Composite Radio Env. –Mid/Long term (src : WWRF) • To allocate new traffic load to Best AP, RA Coordinator provides the cordi-functions between CN and ANs. • IP2 has architecture to cover the mid-term and long-term

  20. IP2(2/3) • Radio Access Coordination Architecture (src : WWRF)

  21. IP2(3/3) • Basic Flows of Seamless Handover (src : WWRF)

  22. Seamless Mobility - Overview - • BcN and B3G • Basic Model of B3G Access Network • Basic Scenario of Inter-system Handover • B3G Testbed

  23. B3G Access Network IAD • B3G is a subset of BcN! • BcN is a N.G. integrated network infra to support broadband multi-media services with the features of Seamless connectivity and guaranteed QoS under converged network including wire-line/wireless communication and broadcast infra in Korea. • Basic approach of BcN is similar to that of B3G; B3G a subset of BcN! OSS/BSS Servers Application Servers OPEN API Feature/Media Servers OPEN API Gateway IP-based Common Core Network (Integ. Wire/Wireless) Wireless 3.5G/4G/5G Wire/W’less Integrated Soft Switch Integ. AGW Optical Backbone Packet Network SGW Virtual Switch/Router Integ TGW TGW SS7 based IN STP Softswitch RAN 2G/3G Next Page! Access Internet PSTN AGW Local Exchange PBX WLAN AP+ ITS+

  24. B3G Access Network • ITU-R Model of B3G Access Network (src : ITU_R) • From Wireless Perspectives of BcN Public Internet Gateway router Common Core Network Servers Vertical Handover BS or AP : Horizontal Handover overlapped coverage area Micro mobility Macro mobility

  25. ISHO – Key Technologies • Inter-system Handover –Real Time Multimedia Service High-Data Rate/ Small- Cell Size High-Speed Mobile Problem (frequent handover, financial difficulties with nation-wide deployment)  Phenomenon ! (Packet-loss, Packet-delay, Packet-blocking, Inter-working) HO Signaling Simplicity Location-Based Fast Handoff Pre-Second-Tier Registration & Pre-Tunnel Session Initiation for F-MIPv6 Resource Reservation Resource Reservation Solution Lossless Location Prediction Target Cell Prediction Timeless Dynamic Cluster Handover Algorithm for F-MIPv6 Multicast / Broadcast Multicast / Broadcast Seamless QoS Adaptation QoS Adaptation Lossless Handover Algorithm using the I-TCP Buffering / Tunneling Vertical Handover Overlaid Inter-system Handover Algorithm Vertical Handover Vertical Handover

  26. Mobility Overview A.1 Handover Triggering L2 Triggering Handover Triggering ISHO Triggering Best Cell Search Target Cell Search ISHO Request, Adm_Chk (T-Cell) HO Request, Admission_Chk A.2 Target Cell Establishment Radio Domain Radio Access Radio Access Radio Access Security (Auth&Cipher) Security (Auth&Cipher) QoS Negotiation (Pkt Traffic) QoS Negotiation Procedure A.3 Serving Cell Release ISHO Registration Handover Registration MIP Triggering MIP Triggering B.1 MIP Triggering Internet Domain CoA Acquisition (Sol. & Adv.) CoA Acquisition (Sol. & Adv.) CoA Acquisition (Sol. & Adv.) B.2 CoA Aquisition B.3 MIP Registration MIP Registration/Tunnel. MIP Registration MIP Registration C. Service (Resume) Service Service Service Mobility Procedure Wireless Area/WLAN (Roaming) Mobile Area/Cellular (Handover) Inter-System Area/B3G (R+H)

  27. Test-bed for B3G in ETRI Low Tier (HPi) 100~150 Mbps High-speed Portable Internet Mobile Adhoc Network Telecommunications World High Tier(HMm) IP based Common Core Network IP based Heterogeneous Access Network 15~100 Mbps High-speed Mobile MM Backbone (IMT-2000) (e.g., WCDMA with SA & MIMO) Global Manager (Mobility, E2E QoS, Global Security) Low Tier (Wireless LAN) (e.g., future version of 802.11) Internet/Intranet World • Optimal approach to achieve the ubiquitous environments • Thru Converged AN with seamless mobility

  28. ㄹㅇ 감 사 합 니 다 ETRi 이동통신연구단 무선액세스그룹 개방형액세스연구팀장 책임연구원 송 평 중 (pjsong@etri.re.kr) (WCDMA 단말 : 010-2001-0020, CDMA 단말 : 010-9600-64045003)

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