Step-by-Step Migration to an All-IP Mobile Backhaul Network

CellularStep-by-Step Migration to an

All-IP Mobile Backhaul Network

Presented by:

Issar Krausz

Business Development senior Manager

Customers’ Event

Crete, May 2007

All-IP Backhauling CE 2007 Slide 2

• Backhaul at the Spotlight

• The Challenge

• Transport cost reduction

• Packet-based Transport

• Pseudowires

• New Transport Alternatives for Mobile Backhaul

• Transport for Fixed and Mobile Convergence

Outline


Cellular Backhaul From the Backstage

to the Spotlight


It’s All About Customer ExperienceHigher Speed, Richer Content

GPRS

EDGE

UMTS

HSPA

40 Kb/sec 75 Kb/sec 2 Mb/sec 14 Mb/sec

Internet

Rich call services

Content to person

Messaging

E-mail

Audio Download

Video Download

Audio Streaming

Video Streaming

Video Telephony

Video Conferencing

SMS

MMS

Interactive Gaming

Internet Surfing

• 1 Minute of audio from MP3 music file equals:

• 132 seconds – GPRS

• 22.4 seconds – UMTS

• 4.1 seconds - HSDPA


• Worldwide mobile subscriber base keeps increasing

• According to Infonetics’ October 2006 report, Mobile Backhaul Equipment,

Installed Base, & Services Market Outlook, there were more than 2 billion

mobile subscribers worldwide in 2005, and that number will jump to over 3 billion

by 2009

• Enhanced user-experience demands higher-speed data rates

• Video streaming, MP3/MP4 downloads, MMS, peer-to-peer applications, Mobile TV

• NG mobile standards and services are within reach

• LTE – 100Mbps

The Rapid Bandwidth IncreaseNo. of E1 Links per Cell-site

2006

82%

12% 6%

1E1 - 2E1

3E1 - 5E1

> 5E1s

33%

28%

39%

Source: Heavy Reading, Dec. 2006

2009


Cell-site Transmission Evolution

• New services = more transport bandwidth right out of the cell-site

• Access becomes the BW bottleneck

• PDH/TDM is not a scalable solution

• HSDPA – the “killer application” for mobile backhaul

2G TDM 1-2 E1/T1

2G BTS

Cell Site

HSDPA ATM Data up to 8 E1/T13G Node B

3G ATM Voice2-4 E1/T1 Transport

NetworkPDH, SDH, LL


HSDPAThe backhaul “killer application”

• Mobile data traffic to double within the next 12-18 months*• Data volumes in backhaul to surge to 3-4 times current levels within 2 years

• Mobile data ARPU will not keep the pace

* According to Strategic Analysis, Nov. 2006

Source: Unstrung Insider


The ChallengeOptimizing the Cellular Backhaul

• Challenge - Handling capacity growth• Backhaul represents 70% of the transport costs

• About 30% of the OPEX (incl. site rental, maintenance, technical sup., etc)

• Evolution to future ready transmission – All-IP and FMC

• Solution – Cost reductions thru• Abis/Ater BW optimization and data compression

• Sharing a single transport network by 2G/2.5G and 3G traffic

• Statistical Multiplexing with traffic prioritization• Iub optimization adapted to HSDPA sales growth/strategy

• Backhauling over alternative technologies and media• Packet-based transport• Using low cost xDSL access


Optimization of A-bis/A-ter Backhaul Links

• Reducing backhaul expenses by more than 50%

• Reduce no. of E1 trunks for BTS-BSC connectivity with no voice quality degradation

• Smallest footprint device in the market – save on co-location costs

• A-bis/A-ter traffic optimization for efficient use of backhaul links – leased lines, satellite links and microwave

• Data Compression

BSC

Vmux-400

A-bisOptimization

TDM/IPTransportNetwork

E1s

Vmux-400E1

A-bisOptimization

E1

GSMBTS

GSMBTS


N x E1 > n x E1

Cut Backhaul Costs thru Aggregation

• Substantial cost savings by

• Aggregation, Grooming, Overbooking/Oversubscription

• Aggregation/grooming of GSM and UMTS traffic onto a unified transport

• Statistical multiplexing of UMTS/HSDPA traffic based on ATM capabilities

• Dynamic bandwidth allocation based on operator’s predefined priorities

• Flexible port configuration to support GSM and UMTS

SDH/SONET/ATM

TransportNetwork

Ethernet

GSM BTS

IP-Node B

ACE-3x00

n x E1/T1 (IMA) STM-1/OC-3

E1/T1sTDM

STM-1/OC-3

ACE-3x00

n E1/T1 TDMCh-STM1/OC-3

2G BSC

Multi-ServiceAggregation

3G RNC

E1/T1sATM IMA

Cell-siteGateway

n x E1/T1 IMA STM-1/OC-3

GbE

http://www.vodafone.com/start.html


What have we achieved so far?

The traditional approach

8-16 E1/T1 for a full service offering

2G TDM 1-2 E1/T1

2G BTS

HSDPA up to 8 E1/T1

3G ATM Voice2-4 E1/T1

3G Node B

Cell Site

Transportnetwork

Savings of over 80 Million Euros/year

Optimized approach

6-8 E1/T1 links

2G TDM 1-2 E1/T1

ACE-3x00

2G BTS

3G ATM 2-4 E1/T1

Cell Site

ATM orSDH/SONET

TransportNetwork

Cell-siteGateway

E1/T1s

3G Node B(*) Further optional reduction using low-cost packet transport

Packet SwitchedNetwork

FE (*)

HSDPA up to 8 E1/T1


What else can be improved?

• There are two main alternatives being considered for

additional backhaul cost reduction

• Using packet-switched transport

• Complement by using DSL access


Why Packet-based Transport?

• Ethernet presents the most scalable and flexible transport solution to

meet the BW challenge right off the cell site

• The cost for leased lines is about 2.5 times

that of new wireline connections

(Ethernet, DSL, cable, PON)

Ethernet Transport Media

CopperFiber

EFMHFC Cable

Microwave

Wireless Mesh xDSL

PON

• Ethernet is a future proof RAN

transport technology

• 3G/3.5G/4G, WiMAX and FMC backhaul

• Ethernet can be extended to the cell

site over various low-cost technologies

• Different types of DSL

• p2p and p2mp (PON) fiber connections

• WiMAX and Ethernet-based radios

• HFC


Lesson in HistoryWhat are Pseudowires?

• Pseudowire is a mechanism that emulates the essential

attributes of a telecommunications service over a packet-

switched network

• TDM leased line, ATM or Frame Relay

• It defines a way to packetize and encapsulate data and create a

logical link between two network entities

• Pseudowire technology is an enabler for circuit emulation and

service emulation of legacy services over packet networks

CLE/CPEPWE3 #1

PWE3 #2

CLE/CPETDM, ATMFR, etc.

LegacyService

PseudowireLegacy Emulated Service

LegacyService

Tunnel


Pseudowire Standards

• RAD is actively involved in most of the standardization bodies

StandardApplicationIETFITU-TMFAMEF

TDMoIPTDM circuit emulationietf-pwe3-tdmoipY.1413, Y.1453,

Y.1414, Y.1452

IA 4.0

IA 5.0MEF 8

CESoPSNTDM circuit emulationietf-pwe3-

cesopsnY.1413, Y.1453IA 8.0MEF 8

SAToPTDM circuit emulationRFC4553Y.1413, Y.1453NoneMEF 8

HDLCoPSNHDLC transportRFC4618NoneNoneNone

ATMoPSNATM service transportRFC4717 Y.1411, Y.1412NoneNone

FRoPSNFrame Relay service

emulationRFC4619X.84NoneNone


Saving with Packet-based Transport“All-IP Transport”

• All-IP unified transport - Future-ready solution• FMC/IMS

• Ready for UMTS Rev.6/7 and over

• All TDM and ATM legacy traffic is transported over pseudowires

• Clock distribution across the packet network• Dedicated ACR (Adaptive Clock Recovery) mechanisms

• Meet the ITU-T G.823 sync. requirements and G.8261 mask

• Evolution to IEEE-1588

PacketSwitchedNetwork

FE GbE

ACE-3x00

n E1/T1 TDM

2G BSC


3G RNC


GbE

ACE-3x00

Cell-siteGateway

GSM BTS

IP-Node B

UMTSNode B

ETH

E1/T1sTDM

E1/T1sATM IMA


HSDPA Offload1st Migration Step – The Hybrid Approach

• First step of the migration to packet switched network

• Separation of transport to carry

• GSM/TDMA and UMTS real time voice and video over SDH/SONET or ATM

• UMTS HSDPA data traffic mapped to pseudo-wires over PSN

• Ensures QoS for voice and real-time traffic

GSM BTS

IP-Node B

ACE-3x00UMTSNode B

GbE

FE

STM-1/OC-3

n x E1/T1STM-1/OC-3

Signaling and Abis traffic

3G real-time traffic (voice and video)

ATM orSDH/SONET

Access Network

ACE-3x00

n E1/T1 TDM

2G BSC


3G RNC

ETH

E1/T1sTDM

E1/T1sATM IMA

3G HSDPA and non-delay sensitive traffic (data)


Cell-siteGateway


GbE


Voice and Real-timeover existing infrastructure

HSDPA overADSL2+/VDSL2 wholesale

GSM BTS

IP-Node B

UMTSNode B

ETH

E1/T1sTDM

E1/T1sATM IMA

The Hybrid Solution over a Wholesale Backhaul Service

• Reduce Opex by using E1/T1 links only for the voice traffic

• Scalable cost-effective broadband transport service over DSL (wholesale)

• HSDPA will serve mainly for Internet access and fast downloads – mobile broadband

• Similar to residential DSL services

• Two options to be considered

• ADSL2+ - applicable for HSDPA (HSUPA may require more UL BW)

• VDSL2 - applicable for HSxPA

ACE-3x00

Cell-siteGateway

GbE

STM-1/OC-3

n x E1/T1STM-1/OC-3


ATM orSDH/SONET

Access Network

ACE-3x00

n E1/T1 TDM

2G BSC


3G RNC

DSLAM

DSLModem

ETH


GbE


STM-1GbE

ACE-3x00

n E1/T1 TDM

2G BSC


3G RNC

ATM or Packet-switched

TransportNetwork

xDSL

DSLAM

LA-130

Cell-siteDSL GatewayWith Bonding

GSM BTS

UMTSNode B

E1/T1sTDM

E1/T1sATM IMA

IP-Node B

ETHMultiple

SHDSL linksor

ADSL2+, VDSL2

Leverage Copper Using DSL

• Leverage existing DSL and DSLAM infrastructure for access to cell sites

• Use multiple DSL links (with copper bonding) for higher bandwidth, longer reach and dynamic adaptivity to available DSL links

• TDM/ATM/Ethernet-over-PSN PW encapsulation over DSL


GbE


GSM BTS

IP-Node B

UMTSNode B

Ethernet

E1/T1sTDM

E1/T1sATM IMA

The Hybrid Approach in a DSL/PSN Environment

• Mix of DSL technologies in a PSN environment

• Differentiate class of service• SHDSL for high quality services

• ADSL2+ and VDSL2 for lower class of service

• Solving reach and BW challenges• SHDSL for symmetrical traffic with long reach and relative low bandwidth

• ADSL2+ for asymmetrical traffic (HSDPA) with mid reach and high download bandwidth

• VDSL2 for symmetrical and asymmetrical traffic with low reach and high bandwidth

LA-130 NG

Cell-site DSL Gateway

GbE

ADSL2+ /VDSL2

n x SHDSL

ACE-3x00

n E1/T1 TDM

2G BSC


3G RNC

Next

Step


GbE

ATM or Packet-switched

TransportNetwork

DSLAM


A Glance at the Transport for Fixed-Mobile Convergence


GSM BTS

IP-Node B

UMTSNode B

ETH

E1/T1sTDM

E1/T1sATM IMA

ResidentialDSLAM/CMTSTriple

Play

Backhaul over the Fixed and Mobile Converged Transport

• Single packet-switched infrastructure for multiple mobile and wireline services

• Aggregation of 2G TDM traffic and 3G ATM traffic onto the Triple/Quadruple Play and business services infrastructure

• Tunneling of legacy traffic using standard pseudowire technologies• TDM/CESoPSN and ATMoPSN based on IETF standards

ATM

ETHETHPacket

SwitchedNetwork

TDM

ACE-3100/3200ACE-3x00

3G RNC

2G BSC

ISP

Cell-siteGateway

Multi-ServiceAggregation ETH

Business


Leverage the IP DSLAM Infrastructure

• Further integration for full FMC implementation• Utilize the same infrastructure as the one used for IPTV

Residential

TriplePlay

IP DSLAM2G BSC3G RNC

ACE-3400

GbE TDMPacket

SwitchedNetwork

ATMEthernet

TDM/ATMoPSNAggregation Device

ISP

New

Trend

xDSL LA-130

Cell-siteDSL GatewayWith Bonding

GSM BTS

UMTSNode B

E1/T1sTDM

E1/T1sATM IMA

IP-Node B

ETHBusiness


…and one more to go


Voice TrunkingBW savings in the Inter-MSC Links

• Significant cost savings • Up to 16:1 voice compression ratio

• Excellent voice quality for customers satisfaction

• Fast ROI – less than 6 months

• Future proof - supports TDM and IP networks for seamless migration to NG transport

• Supports all types of signaling

• Optimized HDLC/SS7 signaling transport

E1s

E1s

STM-1

Gmux-2000

STM-1

Gmux-2000

MSC

MSC

MSC/BSC

Vmux-2100 E1s

MSC Site

MSC Site

Remote MSC Site

Voice Trunking

Voice Trunking

Voice Trunking

E1s

TDMNetwork


Migration to IP Backbones

• Leverage the existing backbone segments while introducing NG-MSC switches

STM-1

Gmux-2000

STM-1

Gmux-2000

MSC

MSC

MSC/BSC

Vmux-2100 E1s

MSC Site

MSC Site

Remote MSC Site

TDMNetwork

MEGACO

MEGACO

MEGACO

NG-MSCSoftswitch

NG-MSC

VoIP

IPNetwork

NG-MSC

VoIP

Voice Trunking and Media Gateway




…to wrap up


2G/3G Aggregation TDM/ATM

IP DSLAM

ATM DSLAM

Migration to All-IPCellular Network

LTE/WiMAX

GSM/GPRSBTS

UMTS/HSDPANode B

CDMABTS

CDMA 2000Node B

BSC/RNC

2G/3G Backhaul over xDSL TDM/ATM

ATM

HSDPA TrafficSegregation TDM/ATM

ETH

E1/T1Clock Distributionover PSN

PSNEthernet/IP/MPLS

n E1/T1

n E1/T1

n E1/T1

STM-1/OC-3TDM/ATM

DSL

DSL

ATM

n E1/T1

n E1/T1

ETH

Abis/Ater/A/E Optimization

n E1/T1

TDM

Conversionto PSN

PDH/SDH

www.rad.com

thank youfor your attention

Issar Krausz

[email protected]

Documents

Step-by-Step Migration to an All-IP Mobile Backhaul Network