Transcript Migration to All-IP Networks CE2007

Customers’ Event
Crete, May 2007
Migration to All-IP Networks:
Directions and Deployment
Presented by:
Dr. Yuri Gittik
Chief Strategy Officer
Outline
• All-IP” Networks: The Approach
• IP Transformation
• Focus on Access and Metro
• Incremental Deployment – Leveraging Existing Infrastructures
All-IP Crete CE.07 Slide 2
Towards “All-IP” Networks
• IP traffic prevails the applications– IP for voice and data services
• VoIP and soft-switches for voice services
• Internet access and IP VPN services
• Pseudowire solutions for Ethernet and legacy Layer 1/2 services
• New IP-based services: IPTV, N-play
• Fixed-mobile convergence
•
“Access-agnostic” services for wireline and mobile customers
•
IMS SIP-based services (“push-to-x”)
• IP/MPLS infrastructure
• IP DSLAMs, PSN backhaul, metro and core networks
• It’s all about money: €conomy- not technology!
• Reduced opex with high economy of scale
•
Reduce the number of different networks and infrastructures
• Flexibility with existing and new services
All-IP Crete CE.07 Slide 3
BT’s 21CN Network Evolution
• From multi-networks to a
multi-service network
• Fewer network elements
• Simpler service management
• Rapid implementation
All-IP Crete CE.07 Slide 4
Drivers for the 21st Century
Network
Speed to Market
- innovative
services
Power to
Customers –
increased
flexibility and
greater reliability
for
Cost Transformation
- significant reduction
in operating costs
Investing now for
future £1B
annual cash
savings
All-IP Crete CE.07 Slide 5
Migration to “All-IP” Networks:
Still Open Issues
• IP transformation
• Maintain legacy traffic (mainly business and mobile)
• Focus on access and metro
• From DSLAM to MSAN
• Ethernet metro
• Incremental deployment – leveraging existing infrastructures
• First of all, SDH infrastructure
• And many others…
All-IP Crete CE.07 Slide 6
Outline
• All-IP” Networks: The Approach
• IP Transformation
• Focus on Access and Metro
• Incremental Deployment – Leveraging Existing Infrastructures
All-IP Crete CE.07 Slide 7
IP Transformation: Legacy over
PSN
Network Core
Access/Backhaul
Services/CPE
Legacy Services
Existing Equipment
Legacy
Networks
SDH, ATM
ATM
DSLAM
2G BTS
3G NodeB
New Services
and Equipment
New
Packet-Switched
Networks
GbE, MPLS, IP
IP
DSLAM
IP RAN
4G NodeB
• Maintain legacy traffic over new packet-switched infrastructures
• TDM, ATM, voice, …
• A broad traffic range: residential and business services, 2G/3G mobile traffic
• Domestic and international coverage
All-IP Crete CE.07 Slide 8
"Classic" Edge-to-Edge Pseudowires
• Emulation of native Layer 1/Layer 2 services, such as TDM, Frame Relay,
ATM or Ethernet, over a packet-switched core network (IP/MPLS)
• Enables transport of a native service over IP/MPLS tunnels
• Emulation is performed by provider edge devices (PE)
• The individual service emulations in this approach are termed pseudowires
• RAD pioneered “pre-pseudowire” TDMoIP in 1999 and leads the pseudowire
standardization and implementation
PW Encapsulation
Function
PW Encapsulation
Function
Customer
Premises
CPE
PE
Attachment Circuit
Native Service
IP/MPLS
PW
PE
Customer
Premises
Attachment Circuit
Native Service
CPE
PW
All-IP Crete CE.07 Slide 9
Broadening the Pseudowire Approach
Network Segment
Access
IP/MPLS
Infrastructure
Platforms
Ethernet
IAD+DSLAM
(MSAN)
Core
“Classic”
Pseudowires
Extended
Pseudowires/Emulation
N/A
Note: Metro segment could be considered as a part of the access network,
or, alternatively, associated with the core network
All-IP Crete CE.07 Slide 10
3GPP Development: More IP/MPLS
RAN
Revisions
Control Entity
R99
Separate RNC
ATM
Rev.4
Separate RNC
Rev.5
Core
Iups
TNL
Voice
Core
Data
Core
ATM
ATM
ATM/TDM
IP/MPLS
ATM
ATM
IP
IP/MPLS
IP/MPLS
Separate RNC
ATM or IP
ATM or IP
IP
IP/MPLS
IP/MPLS
Rev.6
Separate RNC
IP
IP
IP
IP/MPLS
IP/MPLS
Rev.7
IP
IP
IP
IP/MPLS
IP/MPLS
Not final
Distributed
functionality
between separate
NodeB and RNC
LTE: Rev.8+
No separate control
nodes
IP
IP
IP
IP/MPLS
IP/MPLS
Not final
Iub TNL Iucs TNL
All-IP Crete CE.07 Slide 11
Mobile Backhauling:
Towards IP-centric Infrastructure
Milestone 1. Legacy (TDM and ATM-based) cellular voice+data traffic
over PSN infrastructure including backhauling
• Pseudowire solutions with optional clock recovery
• Incremental migration to “all-IP” and IMS solutions
•
Mainly in the core, not backhaul infrastructure, yet with some impact on
backhauling
“Grey area”
Milestone 2. IP-based cellular voice+data traffic over PSN
infrastructure including backhauling
• Regular IP solutions with some cellular-specific implementations
• IMS solutions are expanding into the multi-technology access
• TISPAN is adding functional sub-system for enhanced control of
network resources
All-IP Crete CE.07 Slide 12
Backhaul Evolution Towards IP
• Evolution steps

• Pre-provisioned (w/o control plane) traffic-agnostic transport (TDM, ATM)
• Pre-provisioned (w/o control plane) traffic-aware transport
•
Abis optimization, data compression, …

• [Traffic-aware] transport with control plane
•
Network control plane (IP/MPLS-based), optionally service-aware
•
Service control plane (IP/IMS-based)
• Next steps?
?
?
??
• Access “collapsing” when controller nodes (not entities!) are
eliminated
• From Backhaul (radio sites-controller)+ Aggregation (controllers-edge
All-IP Crete CE.07 Slide 13
Outline
• All-IP” Networks: The Approach
• IP Transformation
• Focus on Access and Metro
• Incremental Deployment – Leveraging Existing Infrastructures
All-IP Crete CE.07 Slide 14
21CN Network Architecture
• CMSAN – Copper MSAN
• FMSAN – Fiber MSAN
All-IP Crete CE.07 Slide 15
ngDSLAM/MSAN: Typical
Deployment Scenario
• Initial Stage: DSLAM platform with strong focus on residential
services (and optional PSTN migration)
• Use standard commodity IAD and CPE
• Low importance of fiber access
• Basic services (voice, Internet access)
• Next Stage: Broadening the focus
• More focus on business customers
•
Access over DSL and fiber
•
Maintaining traditional services (leased lines, ATM)
•
Dedicated smart NTU and multiservice CLE for new and traditional
services
• Cellular backhaul applications
• And now adding IPTV services…
All-IP Crete CE.07 Slide 16
To Ensure Really Multiservice MSAN
Customer Premises
IAD
PBX
Single/multiple
Copper Fiber
CO/POP
3G NodeB
Ethernet
Metro
ATM
Access
Gateway
Single/multiple
Copper
TDM
IP/MPLS
ngDSLAM
MSAN
2G BTS
Radio Site
Customer Premises
NTU/CLE
PBX
Fiber
• Adding a range of smart NTU/CLE products to the MSAN platform
• Access over xDSL and fiber links
• Optional pseudowire technologies to support legacy traffic
• More focus on direct (fiber) access to Metro Ethernet
• Point-to-point and point-to-multipoint (GPON)
All-IP Crete CE.07 Slide 17
Ethernet Metro: Too Many Options?
• Ethernet over legacy networks (SDH, ATM)
• MPLS-based Ethernet metro
• New alternative [emerging] technologies
• Transport MPLS (T-MPLS) – Alcatel, more?
• PBB-TE (former PBT) – Nortel, BT, NSN, (RAD?)
• Yet a clear consensus on the requirements for end-to-end
Ethernet services
• Smart termination and service demarcation are essential
•
Ethernet OAM, traffic handling, protection, …
E-NTU
All-IP Crete CE.07 Slide 18
Outline
• All-IP” Networks: The Approach
• IP Transformation
• Focus on Access and Metro
• Incremental Deployment – Leveraging Existing Infrastructures
All-IP Crete CE.07 Slide 19
Leveraging Existing Infrastructure
Network Core
Access/Backhaul
Services/CPE
Legacy Services
Existing Equipment
Legacy
Networks
SDH, ATM
ATM
DSLAM
2G BTS
3G NodeB
New Services
and Equipment
New
Packet-Switched
Networks
GbE, MPLS, IP
IP
DSLAM
IP RAN
4G NodeB
• How to take advantage of existing infrastructures?
• Ethernet/IP services over:
• SDH: Ethernet over SDH (DTAG, Telenor, …)
• ATM: Ethernet over ATM (FT, DTAG, …)
All-IP Crete CE.07 Slide 20
T-COM: Bottom Up from SDH
All-IP Crete CE.07 Slide 21
Telenor: “All-IP 2010” Network
Distribution
Ethernet/ngSDH
Core
IP/MPLS
SDH
Areas with late IP/MPLS
distribution rollout
80x
nodes
Point-to-point
radio or fiber
Base
Station
Ethernet
CWDM
DSL
Distribution
•
Higher capacity
•
Fewer technologies
•
Seamless services
•
IP-based service platform
with open standards and
common interfaces
•
Common service edge
•
Ethernet interfaces
•
All access types
FTTP
Fiber
New build areas
Core router
ADSL
ADSL2+
SHDSL
Access
VDSL2
High capacity
DSL areas
Distribution router
DSLAM or Ethernet switch
ngSDH node
All-IP Crete CE.07 Slide 22
Ethernet over SDH: Options
• Ethernet traffic (services) over pure SDH infrastructure
• ngSDH, MSPP (Multi-Service Provisioning Platform)
• “Old generation” SDH with external Ethernet-over-SDH
capabilities
•
GFP, Virtual concatenation for “fat pipes”, LCAS, etc.
• Ethernet traffic over combined SDH & PSN infrastructures
• How to bridge two worlds in a most efficient way?
SDH
Metro
Channelized
STM-1
Egate
GbE
Ethernet
IP/MPLS
All-IP Crete CE.07 Slide 23
Summary
• Variety of “All-IP” networks implementation:
“One size does not fit all”
• Increasing importance of intelligent multiservice
access over diverse media
• More technological alternatives are under way…
driven by economics
All-IP Crete CE.07 Slide 24
Thank you for
your attention
Yuri Gittik
[email protected]
www.rad.com