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Next Generation Networks and QoS Koichi Asatani Kogakuin University, Tokyo Chair Emeritus, IEEE CQR-TC Advisory Board International CQR Workshop 2007 May.

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Presentation on theme: "Next Generation Networks and QoS Koichi Asatani Kogakuin University, Tokyo Chair Emeritus, IEEE CQR-TC Advisory Board International CQR Workshop 2007 May."— Presentation transcript:

1 Next Generation Networks and QoS Koichi Asatani Kogakuin University, Tokyo Chair Emeritus, IEEE CQR-TC Advisory Board International CQR Workshop 2007 May 16, 2007 Sanibel Harbour Resort & Spa

2 IP Telephony Subscriber Number in Japan 10 4 0 200 800 600 400 1000 1200 2006.3 2004.12 2004.9 2004.6 2004.3 2003.12 2005.6 2005.9 2005.12 2005.3 0AB-J 050-

3 Broadband in Japan

4 1985 2005 2000 1995 1990 Global International Call Growth source: http://www.dri.co.jp/auto/report/telegeo/telegeotg04.htm Total Traffic (PSTN+VoIP) VoIP Note: Forecasted Data for 2003 and after Billion Minutes

5 Evolution in Networks and Applications WWW NGI Internet ARPA Packet Switched Network B-ISDN ISDN Digital Telephone Network Analog Telephone Network ftp telnet e-mail Internet access Data communications Telephone Broadband Streaming ADSL FTTH FWA nGWL NGN Burst, Streaming Unicast, Multicast Voice sound Video Mutlimedia FR ATM P2P Network Evolution Telecom Applications Internet Applications SDH FAX IP Telephony

6 Principles and Convergence Telecomism Internetism End-to-end Principle End nodes are responsible. End-to-end Principle End nodes are responsible. Network Principle Network is responsible. Network Principle Network is responsible. Stateless networks Stateful networks Trustful networksTrustful end users Terminal liberalization Non-transparent networkTransparent network ISDN PROXY,NAT, Firewall Best effort networks QoS guaranteed networks ADSL flow control, RSVP MPLS DiffServe

7 Source:Rec.Y.2001 Generalized Mobility FMC Unrestricted AccessOpen Access I/F Service Separated Transport Architecture & Open API QoS-enabled Transport Multiple-Broadband Manageable Broadband Definition & Features of NGN

8 Next Generation Networks (NGN) NGN Transport Functions NGN Service-Related Functions Telephone Services Data Services (WWW, e-mail, etc.) Video Services (TV, movies, etc.) Internet Protocol (IP) Anything and Everything Everything (Any and All Network Technologies) (Any/All Applications e.g., voice, data, video) Scope of the Internet Service Stratum Transport Stratum Source: ITU-T Recommendation Y.2011 General principles and general reference model for next generation networks

9 NGN Release 3 -RFID NGN Release 2 -Entertainment -Home Networks NGN Release 1 -Multimedia -PSTN/ISDN Emulations Services and Capabilities Mid of 2006 Enhancement to Release 1 Capabilities Enhencement to Release 2 Capabilities Mid of 2007?End of 2008 -Multimedia -PSTN/ISDN Emulations - Streaming services - Ubiquitous services Release Approach for NGN

10 Complexity of NGN QoS User-perceived QoS is end-to-end (cf. E.800)User-perceived QoS is end-to-end (cf. E.800) NGN QoS is complex becauseNGN QoS is complex because –NGN applications have diverse performance needs –IP is not designed for consistent application performance Various mechanisms have been introduced with specific applicabilityVarious mechanisms have been introduced with specific applicability –Diversity in an end-to-end path is common owing to Different levels of QoS support in endpointsDifferent levels of QoS support in endpoints Varying types of QoS support in the transportVarying types of QoS support in the transport Multiple provider domainsMultiple provider domains Multi-Service Packet Transport 802.xx Access 2G/3G Wireless Cable xDSL Domain 1 IntServ Domain 4 Over-Prov Domain 2 DiffServ Domain 3 MPLS-TE N G N Effective management of resource contention

11 Definition of QoS The collective effect of service performance which determine the degree of satisfaction of a user of the service. The QoS is characterized by the combined aspects of service support performance, service operability performance, serveability performance, service security performance and other factors specific to each service. The term "QoS" is not used to express a degree of excellence in a comparative sense nor is it used in a quantitative sense for technical evaluations. In these cases a qualifying adjective (modifier) should be used. ITU-T Rec. E.800

12 Definition of ( QoE) Definition of Quality of Experience ( QoE) The overall acceptability of an application or service, as perceived subjectively by the end-user. The QoE includes the complete end-to-end system effects (client, terminal, network, services infrastructure, etc). Overall acceptability may be influenced by user expectations and context. User-Experience-Oriented Quality ITU-T Rec. P.10/G.100

13 Standards Setting Organizations on QoE VQEG: Video Quality Experts Group JRG –MMQA: Joint Rapporteurs group for Multimedia Quality Assessment FG-IPTV:Focus Group - IPTV ITU-R SG6 Broadcasting services VQEG JRG –MMQA ITU FG-IPTV ITU-T SG12 Performance and quality of service ITU-T SG9 Integrated broadband cable networks and television and sound transmission ITU-T SG13 Next Generation Networks

14 CNAN CPN TE User Network Performance for NGN Quality of Service for NGN QoE Man-Machine Interface Network Interface Quality of Experience Quality of ServiceNetwork Performance User orientedProvider oriented User behaviour attribute Service attributeConnection/Flow element attribute Focus on user- expected effects Focus on user-observable effects Focus on planning, development (design), operations and maintenance User subjectBetween (at) service access points End-to-end or network elements capabilities Ref. Configuration of QoS, NP and QoE

15 ITU-T RACF Architecture Rs Rw Service Stratum Transport Functions Policy Decision Function Transport Resource Control Function RACF Transport Stratum Service Control Functions (part of IMS or else) Rt RdRp Rc Rn Ru Other NGN s Ri Transport Enforcement Function Interconnection Functions Policy Enforcement Function Network Attachment Control Functions Policy Decision Function service facing, transport independent Transport Resource Control Function service independent, transport dependent, possibly network-segment specific Policy Enforcement Function typically part of border transport elements intra-domaininter-domain RACF augments native transport QoS support Preempting transport congestion at the service control layer All applications (VoIP, IPTV, etc.) involving network-based control can make use of RACF via Rs

16 IP-based network performance U U U U Class 5 1*10 -6 1*10 -5 50 ms 100 ms Class 6 1*10 -6 1*10 -4 Upper boundIPER 1*10 -5 1*10 -3 Upper bound on the packet loss probability IPLR 50 msUUU Upper bound on the 1-10 -3 quantile of IPTD minus the minimum IPTD IPDV 400 ms1 s400 ms100 ms400 ms100 ms Upper bound on the mean IPTD IPTD Class 7Class 4Class 3Class 2Class 1Class 0 Nature of Network Performance Objective Performance Parameter Y.1541

17 Object Quality Assessments Model G.1030 Annex A (Web-browsing) G.Chirp (Web-browsing) One-way Data Application Scenario BS.1387-1One-way (Listening quality) G.OMV (Videophone) J.148 (Multimedia) Two-way One-way Speech/Audio and Video ?.YYY (Cable TV) ?.ZZZ (Multimedia) J.144 (Cable TV) ?.XXX (Multimedia) One-way (Viewing quality) G.107 (Telephone-band) G.WBEM (Wideband) Two-way (Conversational quality) P.563, P.VTQP.862/P.862.1 (Telephone-band) P.862.2 (Wideband) One-way (Listening quality) Network planningNon-intrusive monitoring Benchmarking/ Intrusive monitoring Estimated subjective quality G.1030 Annex A (Web-browsing) G.Chirp (Web-browsing) One-way Application Scenario BS.1387-1One-way (Listening quality) Audio G.OMV J.148 (Multimedia) Two-way One-way ?.YYY (Cable TV) ?.ZZZ (Multimedia) J.144 (Cable TV) ?.XXX (Multimedia) One-way (Viewing quality) Video G.107 G.WBEM (Wideband) P.CQO (Telephone-band) Two-way (Conversational quality) P.563, P.VTQP.862/P.862.1 P.862.2 (Wideband) One-way (Listening quality) Speech Network planningNon-intrusive monitoring Benchmarking/ Intrusive monitoring Media (Telephone-band)

18 NGN-related Standardization Organizations USA Europe ATIS TTC (Japan) TTA (Korea) CCSA (China) IETF ETSI ITU Asia TISPAN3GPP

19 Next Generation IP Network Promotion Forum Established on Dec. 16, 2005 Based on a report from MIC Study Group on Next Generation IP Infrastructure To Promote evolution to IP-based Networks in Japan Under close cooperation among industries, government and academia

20 Forum Structure Strategic Planning WG Home Networks WG

21 Challenges! Latency aware network configuration Implementation: not a subject of standards Ubiquitous applications? –Transaction or (SIP) Connection? QoE/QoS on End-to-End base, including Customer Premises Network, e.g.,Home Networks –No performance allocations to devices outside of UNI –Multi-domain environments

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