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]
Mar 27, 2015
BT’s Plans for its NGN
EU Open Workshop on NGN Policy and Regulatory Issues
22 June 2005
Ittai HershmanDirector, 21CN Commercial DevelopmentBT [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 CHANGINGLANDSCAPE• 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
IP
ATM
PSTN
DSL
KStream
PSTN Leased lines
PDH
Fibre
Copper
Access SDH
EndUser
~5.5ksites
~2ksites
~300sites
~100sites
~15sites
SDH - VC-4
~1ksites
SDH -VC-12
PDH Access
OUR CURRENT NETWORK
PDHAccess
IP-MPLS-WDM
DSL
Fibre
Copper
Aggregation
EndUser
~5.5ksites
~130sites
Class 5 Call Server
Content
WWW
ISP
Muilti-service access Converged Core
21CN - OUR SIMPLIFIED NETWORK
For discussion purposes.No implementation assurances
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
For discussion purposes.No implementation assurances
Metro Node Metro Node
Tier 1 MSAN Node
MSAN Node
CMSAN
FMSAN
TAM
Legacy
MSAN Node
CMSAN
FMSAN
TAM
Legacy
MSAN Node
CMSAN
FMSAN
TAM
Legacy
CMSANTAM
Legacy
MSAN Node
~130 Sites
~1500 Sites
~4500 Sites
~5500 Sites
PRouter
COREDWDM
4/4/3SDXC
Core Node
~10 Sites
~
Voice/PCPE
PRouter
COREDWDM
4/4/3SDXC
Legacy switch
functions
Voice
Intra Metro Ethernet Network
EdgeWDM Ethernet
PE
BRAS
CMSAN
EdgeWDM
FMSAN
TAM
Legacy
~
Voice/PCPE
PRouter
COREDWDM
4/4/3SDXC
Legacy switch
functions
Voice
Intra Metro Ethernet Network
EdgeWDM Ethernet
PE
BRAS
Tier 1 MSAN Node
CMSANEdgeWDM
FMSAN
TAM
Legacy
CMSANTAM
Legacy
SERVICE CONVEYANCE PROTOCOLS
SIP-I
RTP
SIP
RTP
PNNI
SCTP
UDP
SCTP
UDP
ATM over Ethernet
Circuit Emulation
Ethernet Glue Layer
Point of Handover
C7 PSTN REPLICATION MULTIMEDIA ATM NGN PPC
For discussion purposes.No implementation assurances
Note: ATM and Circuit Emulation over Ethernet subject to further standards work.
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 compatibilityand 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