(BT英国电信)NGN的发展-技术和管理

1、Evolution of Next Generation Networks (NGN)- Technology and Regulatory Issues,Satyen Gupta Chief Regulatory Advisor, SAARC Region, BT Global Services,Agenda,NGN -Introduction Advantages of NGN Next Generation Network Architecture Regulatory challenges for NGN PSTN evolution to NGN NGN Migration BT U

2、K Example NGN Key Messages,NGN - Introduction,Next Generation Networks as the name suggests are the networks of future based on emerging technology of IP which is leading to convergence of networks, services and markets and providing efficiency and flexibility in Operation. NGN are based on the laye

3、red approach wherein services provision is separated from the network infrastructure. These are enabling the operators to increase their depleting ARPU by providing multiple and advanced value added services in addition to plain (vanila) voice. The incumbent operators are going for NGN by replacing

4、their existing networks to compete on the technology front and being able to provide new value added services, cutdown on Opex as well as to make their network future- proof.,Next Generation Network (NGN) is a packet-based network able to provide services including Telecommunication Services and Abl

5、e to make use of multiple Broadband, QoS-enabled transport technologies in which service-related functions are independent from underlying transport-related technologies; It offers unrestricted access by users to different service providers. It supports generalized mobility which will allow consiste

6、nt and ubiquitous provision of services to users.,Definition of Next Generation Network (ITU),Broadly, NGN should meet the following technical requirements: (i)Separation of infrastructure and service layers. (ii) Access technology agnostic. (iii) Support quad-play (voice, data, video, mobile) servi

7、ces. (iv) Open Standard Architecture. (v) Integrated Users Interface. Co-existence with PSTN. Meeting QOS standards. Compliance to regulatory and security conditions.,NGN Technical Requirements,Advantages of NGN,NGN makes use of best of both the worlds (Flexibility, Efficiency & Innovativeness of IP

8、 and QOS, Security, Reliability, Customer-friendly features of proven PSTN. Advantages for service providers Reduced CAPEX due to integrated and efficient IP-based technology (Packetize or Perish) Reduced OPEX due to transmission cost saving, less power consumption, less space requirement, less O&M

9、costs Ability to offer increased range of services More flexibility increasing market penetration by offering personal service customization and management Single network layer for management No need for separate networks for voice, data and video Advantages for subscribers Reduced call charges New

10、innovative services at a fast speed Single connection and bill for voice, data, video,mobile (Quad play),Emerging NGN Services EOIP,Fixed Mobile Convergence (FMC),FMC is convergence of access for telephony wherein as per the convenience of the users an mobile call can be delivered on fixed phone or

11、can be terminated through fixed Broadband network on mobile phone. Main motivation for this is :- 1. Spectrum shortage leading to congestion and reduced QoS. (It is believed that 70% of the time a mobile call recipient is on a fixed location/Hot Spot) 2.Mobile subscribers saturation, Fixed lines dec

12、line (Battle for in-building minutes) 3.Broadband becoming ubiquitous and cost effective The “Mobile Handset” is becoming a multi-purpose, multi-band, palm-held computer NGN Technologies enabling FMC (IMS, UMA),Gateways,Internet,Wireless,POTS,Integrated Services Over IP,Evolving towards Flat All IP

13、Communications,Next Generation Networks (NGN),Present Day Networks,Next Generation Networks Technological Evolution,Interfaces,Switching,Call Control,Application & Service Control Server,IP Routing,Gateways,PSTN Switch,NGN Components,NGN v/s PSTN- 90 degree shift,SDH Transport with Overlay packets f

14、or data,Common IP MPLS/Ethernet Transport,NGN a layered architecture distributing intelligence at every layer,Core IP/MPLS Networks,User,Schematic view of NGN,DSL,ASP Network,WEB,ASP Network,VoD,DOCSIS,IMS,MMS,GSM,Wi-Fi,SIP,PSTN,PSAP(公共安全回答地点 ) Network,E911(紧急求援),Source: ASTAP05/WS-IP&NGN/13,NGN - F

15、unctional Planes,Next Generation Networks functional decomposition into five planes. 1. The control plane contains the functionality relating to the control of the transport plane and inter-working with the SCN (Circuit Switch Network). The control plane architecture is intended to be IP-access netw

16、ork independent. 2. The management plane contains the management functionality relating to QoS, Security and network management. 3. The transport plane contains the functionality relating to the underlying packet transport and services. 4. The SCN plane contains the functionality relating to the cir

17、cuit-switched networks. 5. The application plane makes use of capabilities provided by the other functional planes to provide multimedia services.,Technologies for Next Generation Access (NGA),Fundamental characteristics of NGN Packet-based transfer Separation of control functions among bearer capab

18、ilities, call/session, and application/ service Decoupling of service provision from network, and provision of open interfaces Support for a wide range of services, applications and mechanisms based on service building blocks (including real time/ streaming/ non-real time services and multi-media, Q

19、uad play) Broadband capabilities with end-to-end QoS and transparency Inter-working with legacy networks via open interfaces and media gateways Generalized mobility support Unrestricted access by users to different service providers Converged services between Fixed/Mobile (FMC) Independence of servi

20、ce-related functions from underlying transport technologies Compliant with all Regulatory requirements, for example concerning access to emergency communications and security monitoring/privacy, etc.,Practical NGN architecture,What is NGN Ecosystem?(From Laymans point of view),Next Generation Servic

21、es Converged (quad-play-voice, data, video, mobile) Next Generation Access High speed (Broadband) IP based connectivity (ADSL,VDSL,Wi-Max,Cable TV, FTTH, PLC) Next Generation Transport Carrier Ethernet, IP-MPLS Next Generation Architecture Service oriented (SOA), layered (transport, control, applica

22、tion) Next Generation Mobile 3G+(B3G) Next Generation Internet IPv6 Next Generation Interconnect Capacity and Quality based (V and V) Next Generation Licensing Unified Next Generation Regulation Light- Handed,NGN Regulatory Challenges,As per ITU:- “The move to NGNs represents an opportunity to estab

23、lish in advance ground rules for ensuring the continued passage to effective competition and minimise damage during transition”. It is in contrast to the regulation of the legacy network, which came after the networks were actually in place. That is why, NGN is different.,NGN,Numbering,Regulation of

24、 “Plain Old Telephone Service (POTS)”,Quality of Service,“Next Generation” regulatory issues,Emergency Access,Privacy,Security,Competition,Consumer protection,Interconnection,Competition (level-playing field), Interconnection Consumer (QOS, privacy, emergency access) Security & legal interception,Re

25、gulatory implications of NGN,Source: ASTAP05_WS.IP&NGN-09,Interconnection,Regulatory concerns (i)Death of distance and blurring of the traditional boundaries between Access (local) service and Long Distance carriage. (ii) VOIP as a “disruptive technology” putting a challenge for the regulators to pe

26、rform a balancing act in maintaining level playing field. (iii)On-going technological developments causing drastic impact on the telecom scenario forcing a re-look at the service based licensing and geographical area based regulatory regime including Numbering systems. (iv) Level playing field issue

27、 between the licensed telecom operators and value added service providers. (v)Need for new interconnect products based on capacity and quality (V&V) in place of those based on distance and duration (miles & minutes). Access to emergency services like police control room, fire services, medical help

28、etc. (PSAP, E 911 (US), 999 (UK), 100 (India) Security monitoring like legal interception & monitoring (LIM), Wiretap, CLI etc. Requirements of Next Generation Licensing (i)Technology- neutral. (ii)Service agnostic (Single Unified License for Voice,Data,Video,Mobile,Local,LD). (iii)Class license (li

29、censing value-added and application services through authorization).,NGN Regulatory Issues,Conclusion - General Consideration for PSTN evolution to NGN -Services are key when defining any future evolution of PSTN networks, NGN is more about bringing new services to end-users than just Broadband acce

30、ss or Voice Over Packet (VOIP) though both are very important technological milestones in NGN roadmap, -NGN must build on the strengths of both the Telephony and the Internet service models (Best of both the worlds), -NGN emergence will happen but will take time, digital PSTN networks will continue

31、to offer the voice telephony for a while, - State-of-the-art PSTN solutions of today can evolve and stay part of the future NGN domain to preserve investments(co-existence), transport part (class-4) can migrate to NGN to start with for immediate benefits. - The access modernization is key to prepare

32、 the introduction of advance converged services and new quad-play services and applications (data, voice, video and mobile) over the same network and the FMC.,BT UKs Current Network,UK Access Today,E-side Cables,Local Exchange (5.6k),Telephone Pole 8m,Customer Home 26m,Overhead Distribution,Undergro

33、und Distribution,Backhaul,D-side Cables,Street Cabinet 90k,Core network,Current LLU demarcation point, 4m Distribution Points (Lines split almost 50:50 between overhead & underground),ADSL1,Next Generation Simplified Network 21CN,Access Tomorrow,Underground Distribution,Overhead Distribution,Fibre-t

34、o-the-Premises (FTTP),Fibre,Backhaul,Core network,FTTP “Cut-Over” Being planned for “Greenfield” Single, high-quality network Big investment, big savings Paves the way for radical futures,Fibre,Fibre,2004,2005,2006,2007,2008,2009,2010,2011,BTs 21CN vision announced. Consult21 launched. Converged net

35、work architecture developed.Voice transformation trial underway,Industry engagement via Consult21 gains pace. Strategic vendors announced. First service launches based on reusable capabilities,Strategic vendor contracts signed. UK migration plan announced. Part of the IP/MPLS core network in place.

36、Migration control centre established. Comprehensive testing and trials. End user communications strategy enacted. End user migration begins,50% of UK broadband services delivered over 21CN,UK wide migration to 21CN begins. Next generation broadband product available to 50% of UK. 15% of PSTN lines m

37、igrated,Next generation broadband available to 16m end users. 65% of broadband and 50% of PSTN lines migrated,Next generation broadband available to 20m end users.21CN migration substantially complete,21CN completes,21CN Key Milestones,BTs Undertakings offered in lieu of reference to Competition Com

38、mission in September 2005 Regulation to be focused on bottlenecks Incentive to invest in NGNs and innovate Expectation of reduced regulation downstream Promote infrastructure-based competition Benefits the consumer and UK economy BT can compete fairly on a level playing field,Creating a climate of c

39、onfidence for infrastructure competition, investment and innovation,New Era of NGN Regulation Promoting Investment and Innovation,Ex-ante regulation Applies to defined markets where a communication provider has Significant Market Power Provision of network access/interconnect, non-discrimination, co

40、st-oriented prices, etc. BTs Undertakings NGN specific section No foreclosure of network access without consultation Charges to be based on efficient network design Network access to be provided on Equivalence basis Industry group to agree transition to NGN interconnect Compensation arrangements,Reg

41、ulatory Context in the UK,Investment “Regulatory certainty” NGNs are driven (in part) by cost savings Investment requires demonstrable shareholder value Regulators face a difficult challenge No one can “build it and they will come” on revenue bet NGNs/NGAs are disruptive to traditional boundaries Th

42、ey challenge past regulatory assumptions(e.g. thin & dispersed vs. fat & fewer interconnect) Regulation needs to become simpler Requires collaboration amongst incumbents, regulators and communications providers. Over regulation could restrict converged service innovation,Industry Consultation is Key

43、 to success,Regulation and NGN Key Issues,Consult 21 launched Summer 2004 Largest voluntary consultation of its kind ever undertaken in our industry 650 people from industry involved Remit is open and transparent consultation with wholesale customers (CPs) Director recruited from a CP 10 Working Gro

44、ups, including: Product Migration from 20CN to 21CN(E.g. PSTN Interconnect, Broadband, Ethernet) 21CN Migration Management Communications Commercial Each WG has BT and Industry Co-Chairs Industry Steering Board (Ofcom monitors) All proceedings published on the Internet,BTs Consulation Approach Consu

45、lt 21,Functional Separation - Wholesale Concept,Next Generation Broadband:A bold vision for the UK,UKs biggest super fast broadband investment: 1.5 bn,Accessible by up to 10 million homes by 2012,Range of speeds up to 100mbps: with 1,000mbps potential,Basis for nationwide demand led roll out,Worlds

46、most open super-fast network,BUT we need the barriers to investment removed,2,Building on Success,UK has world leading availability & take up,BTs multi-billion pound investment has ensured everyone can be part of the broadband revolution 10 million kilometers of fibre already in the network 120,000

47、businesses have fibre to the premises 10 million people work from home using broadband Higher take up in rural areas than in cities,and provides massive choice to consumers,Massive choice from 200 ISPs Among the lowest prices in the world Opportunity to learn from the experience of others All fibre

48、based services from BT will be wholesaled to other ISPs,5,The Next Chapter: a mixed economy model,ADSL2+ roll out makes speeds of up to 24 Mbps available to 40% population,Widespread access to ADSL2+ and speeds of up to 24 Mbps,2008 FY*,Fibre roll-out brings range of speeds up to 100Mbps Fibre avail

49、able to up to 10 million families Olympic village, a fibre showpiece case,Enhanced copper,Fibre,Fibre to the home in Ebbsfleet Operational trials of fibre to the cabinet,Fibre available to millions of homes and businesses BT backhaul investment reduces network bottlenecks,2010 FY,2012 FY,7,*2008FY =

50、 08/09 financial year,Continuing to develop technologies to enable faster speeds and more services,What it means for consumers,TODAY,TOMORROW,Fast internet.,Instant messaging,VoIP,BT Vision,iPlayer,Multi viewing High Definition TV.,Advanced High Definition gaming experience,High Definition video conferencing,A world of new possibilities from super-fast broadband (up to 100Mbps),But growth of simultaneous usage raises potential peak bandwidth issues for the future,Assured high quality experience even with simultaneous usage of all new high speed applications