65186994 20 Italo Busi I(AL LU) MPLS TP Mobile Backhaul
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Transcript of 65186994 20 Italo Busi I(AL LU) MPLS TP Mobile Backhaul
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The Role of MPLS-TP
in Mobile Backhaul
Italo Busi
22 September 2010
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Agenda
1. Mobile Backhaul Evolution
LTE Impact on Backhaul
2. MPLS-TP for mobile backhaul
Deployments and Standard
3. Conclusions
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Copyright 2010 Alcatel-Lucent. All rights reserved.3 | MPLS-TP for Mobile Backhaul | September 2010
Mobile Backhaul Evolution
LTE Impact on Backhaul1
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Copyright 2010 Alcatel-Lucent. All rights reserved.4 | MPLS-TP for Mobile Backhaul | September 2010
Mobile operator evolution influencers:
Market position (new entrant/incumbent) Overall corporate IP Transformation strategy
RAN evolution
Optimize existing RAN (TDM, MLPPP/IMA
ATM)
Hybrid approach (data off-load) Upgrade to all-IP RAN
Existing investments New investments
Which services to offer (Ethernet,
TDM, ATM)
Level of copper/fiber/microwavepenetration
Current backhaul technologies
Successful migration to packet must consider and leverage:
Scalability of the service (support 4G)
Cell site coverage
Service attributes / assurance (SLA,OAM)
Packet-Microwave, Packet-Optical,IP/MPLS, Broadband access(xDSL/GPON)
Mobile backhaul evolution strategies
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Copyright 2010 Alcatel-Lucent. All rights reserved.5 | MPLS-TP for Mobile Backhaul | September 2010
Whats new?
Increased bandwidth
Need to lower cost per bit
Security
Layer 2 VPNs
IP support in eNB and EPC
L2-based aggregation and transport
Multipoint connectivity (L2VPN)
Higher speed devices
and base stations
Inter-base-station
communications
Impact X2 support
~16 neighbors
Pre-planned interface
Aggregation and
transport network
Mobile layer
eNodeB
eNodeB
eNodeB
X2
Transport layer
L2 VPNs
Mobile layer
MMEs
Core site
SGWs
PDN GWs
Control plane
Data plane
End to End IP Network Architecture..
LTE adds requirements above those for 3G
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Copyright 2010 Alcatel-Lucent. All rights reserved.6 | MPLS-TP for Mobile Backhaul | September 2010
NodeB
Mobile Services Providers and Backhaul Transport Providers
eNB
S-GW
Backhaul
ePC
RGW
Mobile Service Provider
Backhaul Transport Provider
Mobile Service Providers provide e2e service (mobile, transport)
Backhaul Transport Providers provide wholesale transport of mobile, business and
residential traffic from different operators or from different departments within the
same operator
High availability to meet SLA
Measurability by monitoring path (connectivity, integrity and quality)
Instrumentation (alarms and events) in order to assist with network operation
MPLS-TP has been designed to meet the Backhaul Transport Provider requirements
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7/18Copyright 2010 Alcatel-Lucent. All rights reserved.7 | MPLS-TP for Mobile Backhaul | September 2010
How can X2 be deployed?First Option: E-Line to a hub (S-GW/Edge Router)
Suitable for initial hot-spot deployment and consistent with 3G architecture; A
strong requirement for Backhaul Transport Providers or when used with IPSecand Security GW
Second Option: E-Line between eNBs
Higher configuration complexity
Third Option: E-LAN within the subnet
Suitable for network wide introduction of LTE and full-band deployment
MPLS-TP supports E-Line and E-Lan transport services thus enabling operator to
deploy packet-backhaul for LTE
S-GW/Edge router
E-LAN
MME
P-GW
E-LINE (hubbed)
PCRF
E-LINE (direct)
Evolved Packet Core Functions
MPLS
MPLS-TP IP/MPLS
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8/18Copyright 2010 Alcatel-Lucent. All rights reserved.8 | MPLS-TP for Mobile Backhaul | September 2010
P-GW
Security: MPLS-TP and IPSec
Security of heightened concern in LTE because of the distribution of the role of RNC andbecause of location-based services
Especially concern for un-trusted backhaul (Backhaul Transport Providers)Several technologies could be used depending on the required level of security:(Radius/EAP and 802.1X; IPSec for S1 and (less likely) X2)
Fully secure backhaul requires IPSec tunnels and secure handoff to SP and makes thearchitecture more centralized
eNB S-GWSecurity
GW
MME
Un-trusted(Backhaul Transport Provider)
IPSec tunnel
Tunnel endpoints
PCRF
Trusted(Mobile Service Provider)
MPLS-TP provides transparent packet transport across un-trusted area
MPLS-TP
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9/18Copyright 2010 Alcatel-Lucent. All rights reserved.9 | MPLS-TP for Mobile Backhaul | September 2010
MPLS-TP
for mobile backhaulDeployments and Standards2
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Copyright 2010 Alcatel-Lucent. All rights reserved.10 | MPLS-TP for Mobile Backhaul | September 2010
Packet Transport: A customer wish-list example
Management and Control plane priority & resilience
Decoupled from data plane, processed with highest priority
Resilient to network scale and load
OAM
ITU-T Y.1731 OAM (Ethernet), ITU-T G.8114 OAM (Tunnel and PW)
Physical Loopbacks, Loss Measurement and Delay Measurement with high accuracy
for network commissioning and maintenance
Ethernet Client Signal Fail for P2P/P2MP connections
Port shut down or Ethernet CSF propagation on UNIProtection
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Copyright 2010 Alcatel-Lucent. All rights reserved.11 | MPLS-TP for Mobile Backhaul | September 2010
PTN Real Case #1
Fixed-Mobile Operator Asia Pacific
Profile
Incumbent with the largest mobile subscriber base
in the world (+500M)
Challenge
Packet transport to support 3G/4G mobile and
Ethernet business services with innovative
multimedia applications
Reducing backhaul costs, increasing service reach
and optimizing network availability
Solution
Massive PTN deployment end-to-end
T-MPLS/MPLS-TP
We can better support mobile traffic end-to-end with greater flexibility and
reliability, while decreasing our operating costs .
PTN IP/OTN
mobile
business
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Copyright 2010 Alcatel-Lucent. All rights reserved.12 | MPLS-TP for Mobile Backhaul | September 2010
PTN Real Case #2
Fixed-Mobile Operator - Europe
Profile
Large alternative service provider (20M subs)
Challenge
Convergence of transport infrastructure for
enabling next-generation fixed/mobile services
Cost per bit reduction, leveraging statistical
multiplexing and network simplificationSolution
Multi-service PTN platform to support any mix of
traffic from circuit to packet
T-MPLS/MPLS-TP
As traffic is IP, the network evolves to technologies able to natively manage
the packet traffic
PTN IP/Corebusiness
mobile SDH
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Copyright 2010 Alcatel-Lucent. All rights reserved.13 | MPLS-TP for Mobile Backhaul | September 2010
PTN Real Case #3
Mobile Operator Asia Pacific
Profile
Incumbent operator (50M+ subs)
Challenge
Meet the strategy to support LTE backhaul and
expected sustainable growth
Reduced Opex, high reliability & scalability
Multipoint to multipoint services
Load balancing of traffic (full ring usage)
Solution
PTN platform for cost-effective, flexible
aggregation from base station to core
Strong OAM, protections, multipoint support
a reliable and scalable packet-oriented LTE backhaul network which satisfies
the advanced requirements for sustainable growth
PTN IP/Core
LTE backhaul
mobile
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Copyright 2010 Alcatel-Lucent. All rights reserved.14 | MPLS-TP for Mobile Backhaul | September 2010
PTN standard specifications
Is there anything that can be safely deployed today? Yes
ITU-T G.81xx specifications provide a complete set of tools
enabling PTN execution todayby many service providers worldwide
PTN RequirementsITU-T
Mature specs available since 2008
IETF
Architecture G.8110.12 published RFCs
3 stable drafts
Connection oriented data plane
P2P bidir, P2MP, IP-less, Traffic Engineering
G.8110.1
G.81121 published RFC
OAM tools
Status, performance, maintenance
Proactive, on-demand
End to end, segmented
Deterministic behavior, high performance
G.8114
(aligned with IEEE Y.1731)
Multiple competing drafts
Linear protection
Sub-50ms, APS, operator commands
Per link, tunnel, pw
G.8131 Multiple competing drafts
Ring protection
Sub-50ms, APS, operator commands
Protection bandwidth sharing
Per ring
G.8132 Multiple competing drafts
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Copyright 2010 Alcatel-Lucent. All rights reserved.15 | MPLS-TP for Mobile Backhaul | September 2010
PTN standard specifications
Will that be compatible tomorrow? Yes
PTN RequirementsITU-T
Mature specs available since 2008
IETF
Architecture G.8110.12 published RFCs
3 stable drafts
Connection oriented data plane
P2P bidir, P2MP, IP-less, Traffic Engineering
G.8110.1
G.81121 published RFC
OAM tools
Status, performance, maintenance
Proactive, on-demand
End to end, segmented
Deterministic behavior, high performance
G.tpoam
Multiple competing drafts
Linear protection
Sub-50ms, APS, operator commands
Per link, tunnel, pw
G.8131 Multiple competing drafts
Ring protection
Sub-50ms, APS, operator commands
Protection bandwidth sharing
Per ring
G.8132 Multiple competing drafts
ITU-T G.81xx specifications will stay and be updated as appropriate
Fully compatibletools are being
proposed byleading vendorsand operators
(e.g. draft-bhh)
v2
v2
v2
v2 Fully compatibletoday
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Conclusions
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Copyright 2010 Alcatel-Lucent. All rights reserved.17 | MPLS-TP for Mobile Backhaul | September 2010
Conclusions
LTE brings several new requirements
MPLS-TP provides L2VPNs to support LTE services
MPLS-TP provides comprehensive OAM toolkit
MPLS-TP is suitable for both Mobile Service Providers and Backhaul Transport
Providers, enabling deployment supporting a transport grade operations
It is T-MPLS/MPLS-TP prime time
Multi-vendor interoperable implementations of T-MPLS/MPLS-TP exist
T-MPLS/MPLS-TP is already deployed in several Mobile Service Provider
networks
MPLS-TP supports packet-based mobile backhauling for 2G/3G/LTE
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Copyright 2010 Alcatel-Lucent. All rights reserved.18 | MPLS-TP for Mobile Backhaul | September 2010
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