65186994 20 italo busi i(al lu) mpls tp mobile backhaul

7/30/2019 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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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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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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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


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



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



MPLS-TP

for mobile backhaulDeployments and Standards2


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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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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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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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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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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


Protection bandwidth sharing

Per ring



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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


Per link, tunnel, pw


Ring protection


Protection bandwidth sharing

Per ring


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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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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65186994 20 italo busi i(al lu) mpls tp mobile backhaul

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