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Going faster and staying in control- Building the world’s biggest NGN
Tim HubbardHead of Technology Futures
Why did BT begin 21CN
An introduction to 21CN: the technology, architecture and delivery programme
The potential opportunities enabled by 21CN
During the next 60 minutes I propose to discuss:-
21CN Setting some context
BT’s network architecture today
Today
IP
ATM
PSTN
DPCN
PDH
SDH - mesh
SDH - MSH
IP
ATM
PSTN
DPCN
PDH
SDH - mesh
SDH - MSH
DSL
KiloStream
PSTN
Fibre
Copper
DWSS
Conc
DLE
DSC
MSC
Conc
DLE
DSC
MSC
Signalling and Speech traffic
PSTN
Call control
21CN it’s big and bold
Not simply network transformation…a radical overhaul of BT’s business and systems
Supporting a fundamental shift in customers’ new requirements and expectations
Core network
convergence
Remake the
Portfolio
21C Customer
Experience
Web21C
21CN evolution
Massive network simplification
Today
IP
ATM
PSTN
DPCN
PDH
SDH - mesh
SDH - MSH
IP
ATM
PSTN
DPCN
PDH
SDH - mesh
SDH - MSH
DSL
KiloStream
PSTN
Fibre
Copper
DWSS
21CN
IP/MPLSFibre &
Copper
Copper
MSAN
Call Control
Content
WWW
ISP
Multi -service access Converged core
Current thinking. No implementation assurances
Wireless
Ethernet Backhaul
Other CPs
I/connects
21CN network architecture
IP/MPLSFibre & Copper
Copper
MSAN
Call Control
Content
WWW
ISP
Multi -service access Converged core
Wireless
Ethernet Backhaul
Call Server: Carries out “call control” by setting up and tearing down multi media communications sessions, etc
Directory: Holds all numbers, whether they are on 21CN, legacy PSTN, other CP network, etc
BRAS: Broadband service delivery point (mainly UK)
Session Border Controllers: Gateway for customer traffic between 21CN and legacy PSTN/other CP networks
Signalling Firewalls: Gateway for signalling traffic to/from 21CN and legacy PSTN and other CP networks
Other CPs
MSAN: Converts analogue PSTN speech into VoIP
MSAN: delivers either copper based, fibre based or wireless based services to end customers
MSAN: Copper version has “combi card” functioning as DSLAM for broadband and concentrator for PSTN
MSAN: Country specific
21CN Separating speech and control
Metro/Core
MSAN
21CN
PSTNOCP
MSAN
21CN Resilience
De-couple each “layer”
Network
Service
MSAN Metro Core
• UK government approved principles applied to 21CN globally
• Physical and logical resilience
• Services “homed” to two discrete source points
• Service and network availability and quality at least equal to traditional services
21CN Equivalence of Input
Comms Providers
Point of Interconnect
IP/MPLS Core
Metro/Core POP
End Users
MSAN POP
Last mile access
End customer service (any CP)MSAN
Perceived areas of bottleneck by regulator
Openreach Network Backhaul Services portfolio
Infrastructure (BTD/BTO)BT
Services
21CN progress
Service led Broadband
migration in the UK started
(Oct 07)
Customer led Wholesale
Ethernet service delivery in
the UK (Jan 08)
35% of UK national
infrastructure operational
Develop and test brand new
product portfolioDelivered to 164
countries globally
Shift to customer led migrations
PSTN Pathfinder progressing
in South Wales
21CN migration process
21CNMSAN
•Deployment of BTs NGN
20CNDSLAM
PSTN switch
Main frame
BT servingexchange building
•Disconnect copper pairs from 20CN and re-connect onto 21CN
•No change to home or office wiring
End customer site
•No need for end customer site visit
•No change to copper access network
Access network copper pairs
ISDN
•No change to CPE
21CN architecture blueprint
Configuration of products & services
Assembly of services & processes
Globalplatforms
Management & IT
Capabilities
SDK (BT & 3rd party applications)
21CN global network platform
Customers
Software Development PlatformService Creation Engine
Enabling new levels of competition
MSAN Metro Node
To other CPs
To other CPs
21CN Backhaul Network
To other CPs
PSTN
Gateways (B/Band)
BGWs
Call Server
Gateways Control(PSTN)
Non BT PSTN
Non BT PSTN(CP control)
Non BT PSTN and Broadband
Non BT Broadband
CMSAN
Personalised infotainment
and product bundling to
customers
Service delivery from a
“single point”
Discrete personalised
advertising
Third party service “mash in”
and “plug in” through open
APIs and SDKs
Going forward with 21CN??- potential services
Global, virtual supply chains
OSS convergenceImplications of UK NGA
consultation
Current challenges being addressed
In conclusion
• 21CN is carrier grade, secure and industrialised
• Customer experience on 21CN is paramount
• 21CN moves BT from service specific platforms to multi service platform, delivering massive simplification
• 21CN is enabling new service delivery over a global, real time, open platform
Answers
Questions