Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Cracking of wireless networks wikipedia , lookup
Network tap wikipedia , lookup
Airborne Networking wikipedia , lookup
Piggybacking (Internet access) wikipedia , lookup
List of wireless community networks by region wikipedia , lookup
Asynchronous Transfer Mode wikipedia , lookup
Point-to-Point Protocol over Ethernet wikipedia , lookup
BT’s Plans for its NGN EU Open Workshop on NGN Policy and Regulatory Issues 22 June 2005 Ittai Hershman Director, 21CN Commercial Development BT Wholesale [email protected] CAUTIONARY STATEMENT The material in this presentation represents current general technical thinking on how a converged IP network could be implemented. It does not necessarily represent BT's plans. The details of BT's 21st century network are still in the process of development and the subject of consultation. THE CHANGING LANDSCAPE • Convergence is gaining momentum • Convergence needs an underlying infrastructure to deliver and support it • End users want more choice, flexibility and control • Simplicity is key OUR CURRENT NETWORK PSTN Copper PSTN Leased lines KStream ATM DSL PDH Access IP Fibre PDH Access SDH VC-12 SDH - VC-4 Access SDH PDH End User ~5.5k sites ~2k sites ~1k sites ~300 sites ~100 sites ~15 sites 21CN - OUR SIMPLIFIED NETWORK Muilti-service access Converged Core Class 5 Call Server Copper WWW DSL Fibre IP-MPLS-WDM Aggregation Content End User ~5.5k sites ~130 sites For discussion purposes. No implementation assurances ISP INDUSTRY CONSULTATION • Consult21 launched Summer 2004 • Director recruited from industry • 8 Working Groups, comprising: - Product Migration from Legacy to 21CN (E.g. Legacy Interconnect, PPCs, Broadband) - 21CN Migration Management Next Generation Solutions ( E.g. NGN Interconnect, Network Capabilities) • Each WG has BT and Industry Co-Chairs • Industry Steering Board (Ofcom monitors) • All proceedings published on the Internet NGN INTERCONNECT • Converged Point of Handover - Multi-service pipe between two operators - Architecture (i.e. standards) to be agreed at NICC • Service Specific Conveyance - Multiple services will be conveyed across a PoH - Some will be price controlled (e.g. PSTN), others won’t - Some will require service specific network elements - Some services can be defined today, others can’t For discussion purposes. No implementation assurances HOW DEEP SHOULD PoH BE? • BT proposed PoH at ~130 Metro node sites • Some Operators want deeper PoH, because: - They have existing fibre assets that may be stranded - They want to leverage LLU investments - They want to intermediate the wholesale market - They believe conveyance will be cheaper • Ofcom wants deeper PoH, because: - Policy of promoting infrastructure build - Greater competition for backhaul For discussion purposes. No implementation assurances POTENTIAL HANDOVER POINTS CORE DWDM 4/4/3 SDXC P Router ~10 Sites Core Node Metro Node Metro Node Voice/P C PE Edge ~WDM Edge ~WDM P Router 4/4/3 SDXC Legacy switch function s Ethernet PE 4/4/3 SDXC Legacy switch function s ~130 Sites CORE DWDM BRAS Voice Voice/P C PE CORE DWDM Ethernet PE BRAS Voice P Router Intra Metro Ethernet Network Intra Metro Ethernet Network Tier 1 MSAN Node Tier 1 MSAN Node Edge WDM FMSAN T A M T A M Edge WDM CMSAN FMSAN Lega cy Lega cy ~1500 Sites CMSAN MSAN Node MSAN Node FMSAN T A M MSAN Node FMSAN FMSAN CMSAN T A M Legacy CMSAN T A M CMSAN Legacy Legacy ~4500 Sites MSAN Node CMSAN ~5500 Sites T A M CMSAN Legacy For discussion purposes. No implementation assurances T A M Legacy SERVICE CONVEYANCE PROTOCOLS C7 PSTN REPLICATION SIP-I RTP MULTIMEDIA ATM SIP PNNI RTP NGN PPC Circuit Emulation SCTP UDP SCTP UDP Ethernet Glue Layer Point of Handover Note: ATM and Circuit Emulation over Ethernet subject to further standards work. For discussion purposes. No implementation assurances ATM over Ethernet STANDARDS CHALLENGES • Many fora developing open standards • BT committed to NICC/TSG process • Sourcing standards for consideration from: - IETF, TISPAN, Metro Ethernet Forum, 3GPP, etc. • But, localised variants cost time and money - Balance between backward compatibility and the burden of forever carrying the past For discussion purposes. No implementation assurances REGULATORY FRAMEWORK • NGNs Are Driven by Cost Savings - No one can “build it and they will come” on revenue bet - Investment requires savings flow back to shareholders • Regulators face a difficult challenge - NGNs are disruptive to traditional boundaries NGNs challenge past regulatory assumptions (e.g. thin & disperse vs. fat & fewer interconnect) • Regulation needs to focus on the future, not the past - UK embarking on a new path forward: equivalence BT’s FUTURE TECHNICAL ESTATE 21CN SUMMARY • 21CN is the enabling infrastructure for growth at BT and for its customers • The most ambitious business transformation programme in communications worldwide • Represents a major investment by BT