Converging 2G/3G and UMTS/CDMA on Common Backhaul Infrastructure

Copyright © 2008 Inf onetics Research, Inc.

1

Converging 2G/3G and UMTS/CDMA on Common Backhaul Infrastructure

Session 4 • April 2, 2008 • 2:00 p.m. PT

Presented byPanelists


2

Today’s Speakers

Stéphane TéralPrincipal Analyst, SP VoIP, IMS, and Mobile Infrastructure

Dan KurschnerSystems Marketing

Manager

Bruce MillerCTO & VP of Engineering

Aviv RonaiChief Marketing officer

Craig CowdenVP, Cable/VoIP & Access Strategy


3

Agenda

• Market Trends• Problems to Be Solved• New Options and Solutions• Service Provider Deployment Applications• Sponsor Approaches• Conclusions• Q&A


4

Agenda



5

• …with many flavors, and many technologies

• And is accelerating bandwidth demand for cell site backhaul– Migration from TDM to Ethernet-based backhaul services is critical

for achieving the scalability, bandwidth upgrade agility, and unit cost targets to enable profitable growth in data services

Mobile Broadband Is Taking Off…

iPhone

GSM/EDGE

XOHM

WiMAX

Next G Mobile Web 2.0

CDMA2000 EV-DOW-CDMA/HSPA


6

Agenda

• Market Trends• Problems to Be Solved• New Options and Solutions• Service Provider Deployment Applications • Sponsor Approaches• Conclusions• Q&A


7

Problems and Challenges

• Situation– Mobile operators traditionally have relied on LEC T1 circuit switched

connectivity as the default backhaul option – Trend: Unlimited voice and data services increase BH traffic demand– As backhaul capacity grows, opex grows faster than supporting revenues

• Action– Must find BH solutions that decouple current cost-capacity dynamic

• Result– Evolve to Ethernet infrastructure while preserving capital investments

– Pursue hybrid fixed wireless/wireline backhaul architecture

– Bandwidth upgrade speed is logical (vs. physical) and flexible

– Maintain carrier-class performance requirements

As wireless carriers add capacity intensive apps and services,backhaul efficiency must be optimized to sustain margins


8

Problems and Challenges

• What to implement to meet my requirements for today and tomorrow?– Short term solution for my immediate needs, but will be obsolete in 2-3 years?

– Delay implementing broadband backhaul until my network is all-IP?

– Is there a solution for my immediate needs and future all IP broadband requirements?

• Design a Carrier Ethernet network to support the needs of the mobility user– Latency - Clock Distribution - Open Standards - Quality of Service - High Availability -

Multimedia Services

• Find technology partner able to support my evolving requirementsover time– Will my technology partner deliver what was promised?

– Will the features they provide be in their development main stream, so that future upgrades and scaling can be accomplished without heavy lift or expense?


9

Ethernet and TDM Coexistence

Microwave is the dominantbackhaul technology

Source: Heavy Reading, Ethernet BackhaulQuarterly Market Tracker, Nov 2007

~80% of 3G cell sites arecollocated with 2G cell sites

Microwave backhaul is required to carry both Ethernet & TDM traffic


10

Mobile Backhaul Technology Evolution

TDMNxT1/E1 …

NxT1

BTBTSS

PDH Transport– DS1 equipped intermediate facilities– Challenge: Operational cost savings and

evolution to Ethernet DS1

FacilitiesOr

Microwave

TDM

Ethernet

NxT1/E1 …NxT1

BTBTSS

Optimization

TDM …EoPDH

Copper and TDM Microwave Evolution

TDM

Ethernet

NxT1/E1 …NxT1

BTBTSS

Optimization

PWE

Circuit EmulationEthernet

Fiber and Ethernet Microwave Ethernet Evolution


11

Agenda



12

New Options and Solutions

• Sprint has several solutions available for 2G/3G backhaul depending on economics, availability, and network performance– Preferred wireline-based solutions include:

• Fiber to the cell site via cable MSOs, AAVs, or dark fiber

• Ethernet over hybrid fiber/coax using DOCSIS from cable MSOs• Ethernet over copper from AAVs

• Migration to Ethernet requires either circuit emulation or retrofitting BTSs

– Preferred multi-tier hybrid fixed wireless/wireline solutions include:• LMDS – point-to-point and point-to-multi-point

• Common carrier microwave• BRS (2.5Ghz spectrum)

– Sprint’s deployment of a converged backhaul solution for WiMAX will be leveraged for 2G/3G backhaul

• Initial 2G/3G convergence will be TDM with migration to Ethernet dependent on economics of retrofitting existing BTS to IP across all vendors


13

New Options and Solutions

• Extend the IP/MPLS core capabilities into the RAN backhaul network

• Support inter-MSC and inter-RNC transport over CE/MPLS• Convergence of ALL RAN traffic, regardless of generation or

technology (2G, 3G, GSM, CDMA …)• Carrier Ethernet implementation that fulfills all mobile requirements

– Low latency– Clock distribution– IP security– High availability

• 5 x 9’s capable• > 50ms route recovery • Path redundancy


14

New Options and Solutions:Carrier Ethernet Acceleration

Identity Address Mgmt

Portal Subscriber DatabaseMonitoring Policy

DefinitionBilling

Service Exchange

Core NetworkIP / MPLS

Aggregation NetworkMPLS/IP

Carrier Ethernet Aggregation

DSL Access Node

Residential BNG

Business MSE

Business

Corporate

Access EdgeResidential

STB

Residential

STB

Business

Corporate

Distribution Node

Aggregation Node

Ethernet Access Node

Aggregation Node

STP ETTX

Access Rings

Wireless

VoD

Content Network

TV SIP

E1: $300-400 Mbps/mo

T1: $250-350 Mbps/mo

10Mb Ethernet: $80-100 Mbps/mo

100Mb Ethernet: $15-20

Mbps/moSource: Infonetics


15

How the RAN Could Look in 0–3 Years

PW ov erIP/MPLS

IP/MPLS

BTS

BSC

Node B

RNC

MGW

Cell site10,000+

Pre Agg500+

Aggregation30+

Core site2+

Voice

DataGGSNSGSN

BTS

Microwave

RAN Core

PW ov erIP/MPLS

Synchronous Ethernet and 1588

CellSite

Node B

IP/MPLS


16

Migration

• Solutions must fully support today’s hybrid network– TDM, ATM, possibly IP/Ethernet

• As older technologies phase out, new technologies expand

• Need to scale

• Need to support new applications that may not be considered at this time– Most applications running over networks today were not

thought of 10 years ago

The answer:

• Flexible, powerful platforms and software based on open standards


17

MPLS

• Established standard to manage traffic flows

• Ease of interoperability between vendors

• Ease of interoperability between Layers 2 and 3

• Best support for traffic mix

• Proven to support all types of traffic as more and different applications are introduced to the Packet Network

• Supports more than just point-to-point– P2MP, IPTV (Unicast, Multicast, etc.)

• De-centralized intelligence ensures fast reaction and handling of all traffic during network difficulties


18

Proposed Migration Models

Enjoy Both Worlds

TDMoETH

ETH & TDM

Map TDM over packet (PWE)All Packet When

Safe & FamiliarSonet/SDH Map Ethernet over PDH/ SDH ETHoTDM

Native2 Carry natively each traffic

ETH

nXT1/E1

Control

?


19

Ethernet Increases Reliability

Dynamic Adaptive Modulation• Graceful link degradation

and recovery

• Drop traffic based onClass of Service

• Optimal performancewhen used in Ethernet

• Goal– Improve operational efficiency of microwave links by increasing network

capacity over existing infrastructure while reducing sensitivity to environmental interferences

• How does it work?– Utilize highest possible modulation considering the changing

environmental conditions– Hitless and errorless switchover between modulation schemes based

on signal quality


20

Not All traffic Is Created Equal

Or the equivalent

0

50

100

150

200

250

Availability Capacity Adaptive - Both

99.9%

99.99%99.999%

With Adaptive Ethernet Microwave: (Win-Win)Gain overall capacity while increasing availability

Single service:50Mbps @99.999%or155Mbps @99.99%

Multiple services (Σ = 200Mbps)50Mbps @99.999%105Mbps @99.99%45Mbps @99.9%


21

GSM Wireless Backhaul Optimization

Optimized connectionsOptimization

10-20%

Sector 1

Sector 2

Sector 3

Remove unwanted bits Silence

suppressionDynamic Pooling

45% 15-40%10%Signalling

Non GSM systems

30% - 50% Bandwidth Gain

<< Incremental Efficiency Gains

BSC

Sector 1

Sector 2Sector 3

SignallingNon GSM systems

Sector 2 trafficSector 2 traffic


EDGEEDGE


Standard cell site connectivity

BSC


22

EoPDH for Mobile Backhaul

• Enables mobile operators to backhaul and aggregate data services over a Carrier Ethernet infrastructure– Terminates PDH circuits at hub sites resulting in more efficient (lower OpEx)

transport of 4G IP services– Natural evolution of current TDM-based backhaul network to more efficiently

transport high growth IP-centric applications• Enables subscriber data service aggregation and oversubscription over Carrier Ethernet

transport network between switching hubs

Bonded T1s/E1s

LECLEC

Ethernet Frame

T1s/E1s in OC-n/STM-n

EoPDHCLE

EoPDHAggregator

Mobile Mobile Switching Switching Center or Center or Switching Switching

HubHubCell Site Cell Site

RANRAN

Ethernet Service Frame (EVC)

MicrowaveBackhaul Provider

Switching Switching HubHubSwitching Switching

HubHub

InternetInternet

Aggregated DS1/E1

PDH, SONET/SDH

Ethernet


23

CDMA Optimization:Aggregation CDMA 2000 and EV-DO

AlarmAccess

Cell Site

Data Switch or Router

Mobile Switching Office

CDMA 2000

CDMA AMPS

AlarmAccess

EV-DOT1 to OC-3 to Ethernet

Cell Site

CDMA2000T1

T1CDMA AMPS

T1

T1

BTS

Digital Cross-connects

Mobile Switching Office

CSU/DSU

CSU/DSU

CSU/DSU

CSU/DSU

CSU/DSU

CDMA EV-DO

CDMA 2000

Interwork EV-DO and CDMA 2000 so that CDMA backhaul can be optimized by at least 3:2, and most likely by a much higher ratio

Before – Circuit BasedCostly Multiple-T1 Cell Site Backhaul

After – Packet BasedCost Efficient Cell Site Data NetworkPlus Remote Management


24

Migration to IP RAN Transport with Pseudowires

Public Internet

RNC3GBSC

2G

IP Services

3G

2G

TDMSONET/SDH

ATM

Metro Ethernet IP/MPLS

4G

3G2G

• Evolutionary migration converges both IP and legacy services to packet/IP-based transport

• Leverages cost effective Ethernet services/technology• Support future technologies such as UMTS Rel. 5&6, and HSDPA• Enhanced QoS traffic prioritization


25

Agenda



26

Hybrid Fixed Wireless/Wireline Architecture

Microwave

LMDSAnd/Or

Ethernet over DWDM

iDEN

1xRTT

DO-0&A

4G

iDEN1xRTT

DO-0&A4G

Backhaul

Aggregation

Tier 1Wireless Aggregation Converged Backhaul

Tier 2Backhaul Hub to Sprint Facilities

SprintSwitch

BRS (2.5Ghz)

Ethernet over SONETAnd/Or

Third Party Provider

And/Or

And/Or

Enterprise

Enterprise

NOTE: Migrating 2G/3G to Ethernet requires circuit emulation (pseudowire) or retrofitting BTS to be Ethernet ready.


27

Upgrade from SDH/PDH to CEUsing Same Architecture

RAN Core

AccessLayer

AggregationLayer

RAN Edge

. .. . . . .

STM1/4 Ring

STM1/4 Ring

STM1/4 Ring

STM1/4 Ring

STM4/16 Ring

622M/2.5G

Agg SiteBSC

RNC

Agg SiteBSC RNC

STM1/4 Ring

Agg Site

BSC

RNC SGSN

MGW

MSCServer

SIGTRAN-

Control Plane

Voice

Bearer

Plane

Packet

CoreSTM1/4 Ring. . .

Cell Site

Cell Site

Cell SiteSTM4/16

Ring622M/2.5G

STM16/DWDM

2.5G/10G

Cell Site

RAN CoreAccessLayer

Aggregation

Layer

RAN Edge

. .. . . . .

GE Ring

GE Ring

GE Ring

GE Ring

10GE RingAgg Site

BSC

RNC

Agg SiteBSC

RNC

GE Ring

Agg Site

BSC

RNC SGSN

MGW

MSCServer

SIGTRAN-

Control Plane

Voice

Bearer

Plane

Packet

CoreGE Ring. . .

Cell Site

Cell Site

Cell Site10GE Ring

IPoDWDM Ring

Cell Site


28

High Availability Options

Resilient Fabric MPLS-TE FRRNSF-SSOISSU


29

CDMA, GSM, and Fixed Networks over CE/MPLS

PSTN

Internet/Intranet

IP/MPLSCore

BSC

RNC

MSC

BSCBSC

RNCEVDO

GSM CDMA

CDMA-BTS

GSM - BTS

Node-B

DOM

CDMA-BTS

GSM - BTS

Node-B

DOM

RNCUMTS


30

Backhaul Considerations

1. What bandwidth to plan to?2. Where is the right spot for placing a Pseudowire (PW) engine?3. When is the right time?4. What would be the best deployment business model?5. What statistical gains to assume?

Aggregate SwitchPOP

Base Station

Aggregation Backhaul BS Backhaul

Control

Access Backhaul Aggregation Backhaul

• Capacity

• Availability

• End-to-end (latency, QOS, reliability)

• Scalability: 20-100 Mbit/s

• Low cost: a lot of base stations

• Network utilization: (TDM/packet mix)


31

Native2 Microwave RAN access

Tail site #1

Tail site #2

Tail site #3

Tail site #4

Aggregation site

Chain site

Fiber site

Native2

1+0

Native2

1+0

Native2

1+0

Native2

1+0

Native2

1+1

Native2

1+1

Packet or TDM based fiber aggregation

network or leased lines

RNC/BSC

FibeAir IP-10

FibeAir IP-10

FibeAir IP-10

FibeAir IP-10

FibeAir IP-10

FibeAir IP-10

FibeAir IP-10

n x T1/E1

Ethernet

Channelized STM1/OC3

MW Radio link

IP-10 with integratedEthernet switching & TDM cross-connect

Ethernet and TDM Coexistence


32

Real-World Customer Deployment:Architecture Today

DS0 grooming of GSM / UMTS links with T1 backhaul

Cell site

Cell site

UMTS

GSM

SIAD

BSC

SMLC

MSC

RNC

SGSN

MGW

MSNLMU TDMA

T1

10/100Ethernet

T1

T1

T1

Ethernet

LEC T1 Backhaulnetwork

EMS SystemAlarming


33

Real-World Customer Deployment:Architecture for HSDPA Offload

• UMTS IMA switched to backhaul ATM/DS3C• IMA T1 to NodeB• HSDPA over PWE/Ethernet

Cell site

Cell site

UMTS

SIAD

BSC

SMLC

MSC

RNC

SGSN

MGW

MSNLMU TDMA

HSDPAData offload

T1/IMA

DS3c

T1/IMA

10/100Ethernet

GSMT1

V.35 T1

Ethernet

EthernetServices from

LEC

TDM / ATMServices from

LEC

EMS SystemAlarming


34

iConnect™ Wireless Backhaul


35

Agenda



36

Cisco in the RAN PortfolioIntelligent Broadband at Reduced Costs

2G3G4G

PWE3

PSTN

Internet/Intranet

IP/MPLSCore

BSC

RNC

MSC

Pseudowire over MPLSPseudowire over MPLSCisco 7609

BSC RNC

Cisco 7600Cisco 7606 Cisco 7604

BSC RNC

Cisco 7606MWR-1941

HSDPA Data via PWE3

All Traffic and Clock

via PWE3

ACE-3200

PWE3/MPLS via

CE Microwave

CE/MPLS


37

Native2 Microwave RAN Backhaul

Pre-Aggregation Site

Aggregation Site Core Site BSC

RNC

XC

XC

Ceragon FibeAir

Native2

Pseudow ireCeragon FibeAir

Cisco 7600

Cell Site Gateway Cisco 7600

IP/MPLS

Tail site

Tail site

Ethernet

E1/T1 (TDM/ATM)

OC-3/STM-1

Pseudow ire

Fiber Site

Native2

Native2

Microwave radio with integrated networking and nodal capabilities


38

Native2 to the Hub/Agg/Chain Site; Pseudowire to the Network

Terminate the TDM/ATM as soon as possible: At the hub. Reopen at the Network Controller.

Aggregation Site Core SiteNative Ethernet

BSC

RNC

XC

Pseudow ireXC

Ceragon FibeAir

Cisco 7600

Native2

Pseudow ireCeragon FibeAir

Pseudowire

Cell Site Gateway Cisco 7600

IP/MPLS

IP/MPLS

Tail site

Tail site

Ethernet

E1/T1 (TDM/ATM)

OC-3/STM-1

Pseudow ire

Pre-Aggregation Site

Cisco 7600


39

Turin’s Approach

• Turin Networks’ solutions enable wireless operators to:– Build a unified RAN to distribute 2G/3G services while greatly reducing space,

power and cost

– Assure OPEX and CAPEX savings via software definable architecture and cell site Multi-Service Transport

– Seamlessly migrate access networks from TDM to ATM to IP/Ethernet technologies

– Allow use of lower cost transport alternatives to carry (or offload) existing services as bandwidth demands increase

– Begin to transition existing TDM, SONET/SDH and ATM network infrastructures to true IP based/IMS networks

Turin’s iConnect wireless backhaul solutions support any service over any transport enabling the operator to deliver high

revenue-generating data services while reducing operating costs by an average of 25% with an ROI of less than 12 months


40

Agenda



41

Conclusions

• The wireless industry needs to cut backhaul unit cost, and redirect spend away from the LECs

– Sprint believes per Mb price points need to be at least 50% below LEC T1 rates

• Vendors are embracing the challenge and proposing various solutions:

– Cisco: Carrier Ethernet-based platform– Ceragon: Native2 (carrying natively each traffic type) and/or Pseudowire

– Turin: iConnect, which supports any service over any transport

• Bottom Line– Aggregating bandwidth demand across all wireless platforms, existing

and future, is the name of the game…– …with Ethernet as the focal technology


42

Today’s Speakers

Stéphane TéralPrincipal Analyst, SP VoIP, IMS, and Mobile Infrastructure

Dan KurschnerSystems Marketing

Manager

Bruce MillerCTO & VP of Engineering

Aviv RonaiChief Marketing officer

Craig CowdenVP, Cable/VoIP & Access Strategy

Date post:	15-Dec-2014
Category:	Documents
Upload:	dominque23
View:	2,479 times
Download:	9 times

Converging 2G/3G and UMTS/CDMA on Common Backhaul Infrastructure

Documents