2970_Optimized Mobile Transport Solution

8/6/2019 2970_Optimized Mobile Transport Solution

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Cellula

Optimized Mobile Transport Solution

Innovative Access Solutions

Cost-Effective Backhaulfor 2G to 3G Migrationand Beyond


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Transmission today typically accounts for approximately one-quarter of the total costs o

the radio access network (RAN), with cellular backhaul estimated to contribute between

40-60 percent of the mobile operators network operating expenditures. These figures

primarily reflect current TDM backhaul networks deployed to handle circuit-switched voic

services and low bit rate data, such as simple messaging services (SMS) and email. With

mobile operators rushing to offer their subscribers real-time video, broadband Internet

connections and other data-intensive or delay-sensitive applications, the economics of

their network operations are going to change dramatically. Not only must they continue

to maintain their existing 2G services, but they will also have to invest in new technolog

to support the extensive rollout of bandwidth hungry UMTS and CDMA 2000-based rich

content services as they cope with competitive pressures that may hamstring potential

revenue growth and easily hobble profitability.

The Challenge: Handling Exponential Traffic Growth

Beyond the immediate problems of implementing new technology and managing price

pressures, the most formidable challenge facing mobile operators today as they plan the

migration to a new radio access network is the excess growth in traffic anticipated by th

rollout of High Speed Packet Access services (HSDPA and HSUPA). The exponential spik

in capacity required to transport these higher bandwidth offerings with peak per use

throughput reaching 14.4 Mbps will inevitably necessitate even tighter control over

cellular backhaul operating expenses (Opex) and a reduction in capital equipment costs

(Capex).

For the most part, the technology already exists to handle these challenges and lead

mobile operators successfully and profitably into the era of rich content and the introductio

of fixed and mobile convergence. Trade-named Optimized Mobile Transport, this suite o

integrated solutions is offered by RAD Data Communications to enable mobile operators

and service providers to deliver both basic and advanced subscriber services while keepin

a tight lid on cellular backhaul costs.

How to Implement Cost-Reduction Technologies in theAccess Infrastructure

Rich-Call Servic

Content to Pers

Messaging

Internet

UMTS

75 kbps

EDGE

GPRS

HSxPA

40 kbps 2 Mbps 14 Mbps

SMS

E-mail

MMS

Audio Download

Video Download

Audio Streaming

Video Streaming

Video Telephony

Video Conferencing

Interactive Gaming

Internet Surfing

Mobile Data Services Evolution

Higher Speed, Richer Content


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utureWith RADs Optimized Mobile Transport

platform, mobile operators can easily

leverage their existing radio access network

infrastructure for more efficient backhaul

of 2G and 3G traffic.

RADs Optimized Mobile Transport

platform supports various optimization

approaches:

j Abis/Ater bandwidth reduction and 3G

data compression

j Convergence of co-located 2G/2.5G and

3G traffic over a single backhaul network

(TDM, ATM and packet-based)

j Statistical multiplexing with traffic

prioritization

j Iub optimization adapted to HSDPA and

future HSUPA expansion

j Migration to packet-based transport

networks

Furthermore, RADs Optimized Mobile

Transport platform facilitates use of all

available access network media and

services, including Metro Ethernet, low-

cost xDSL, cable/HFC, and PONs.

Optimized Mobile Transport is especially

suitable for mobile operators with fixed-

line networks, enabling cost-effective,

fixed-mobile convergence in the backhaul.

Radio Access Network

PDH/SDH/SONET/ATM/DSL/

Ethernet/IP/MPLS

Transport Network

AGGREGATION

TRAFFICOPTIMIZATION

Mobile Core Network

MSC

BSCRNC

RATE, MEDIA &PROTOCOLCONVERSION

VOICETRUNKING

Base Stations

TDM/ATM/IPBackbone

MSC

MSC

RADs Optimized Mobile Transport Platformfor 2G and 3G Backhaul

PSEUDOWIRE

Cellular Backhauling over any Infrastructure

BTS/Node B

BTS/Node B

BTS/Node B


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Step-by-StepStep-by-Step Migration toan All-IP RAN

Although data-centric applications are

rapidly gaining ground, voice will continue

to play a major part in mobile service

offerings for years to come. According to

reports by the industrys Universal Mobile

Telecommunications Service Forum (UMTS),

voice traffic volume will remain a dominant

component of total traffic well into 2020,

evolving into rich formats like video call. On

the other hand, although several more yearsare certain to pass before the promise of

an all-IP network becomes a reality, mobile

network planners searching for a

comprehensive backhaul solution today may

want to consider implementing the packet-

switched option for their current traffic

requirements.

There are a number of reasons why

transporting cellular traffic over Ethernet,

IP and MPLS is a viable alternative to TDM

leased lines or ATM. For starters, Ethernet

is becoming widely available in the WAN

and service providers are beginning to

aggressively market their solution to mob

operators at a cost competitive with lease

lines. Ethernet also offers more capacity

finer granularity. Furthermore, some rad

equipment manufacturers have already

introduced Ethernet ports in their EV-DO

base stations and in their UMTS equipme

in accordance with 3GPP standard rev. 6/Ethernet transport is applicable for divers

media, including point-to-point microwav

cable networks and Metro fiber.

Despite the advantages, Ethernet presen

a number of technical challenges when

used as a carrier-class WAN technology:

These include delay and delay variation

problems, minimizing packet loss, enablin

end-to-end operation, administration an

maintenance mechanisms to ensure Quali

of Service across the RAN, and supportin

Migration to All-IP

Multiservice Pseudowire Solutions


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Pseudowire technology has been standardized by industry bodies, including the ITU, IETF,

MEF, and MFA, and adopted by leading telecom vendors. Pseudowire is transparent to

data and to signaling, and, therefore, preserves investments in existing technology while

avoiding forklift ugrades to radio equipment or other network devices. Pseudowire also

enables an end-to-end transport solution, maximizing control over network resources.

Using pseudowire solutions, the mobile operator benefits from cost-reductions associated

with Ethernet/IP/MPLS transport as well as from the implementation of a future-proof

infrastructure. Another advantage is that pseudowire transport is available over any media:

wireless (WiMAX or point-to-point), DSL, Metro Ethernet, MPLS core, and PON. Service

providers gain by being able to leverage their data access networks for mobile voice,

broadband services and video to generate new, additional revenues.

Since pioneering pseudowire gateway solutions in 1999, RAD has shipped more than

50,000 pseudowire ports and benefits from extensive field-tested deployments in

enterprise, service provider and mobile backhaul applications around the world.

The greatest stumbling block to successful use

of packet-switched networks for cellular

backhaul is the need to synchronize the basestation clocks across the cellular network to

facilitate call stability and handover. TDM-based

leased line or microwave networks inherently

deliver timing along with the data, and even

ATM networks provide a physical clock reference.

Asynchronous statistical PSNs, however, do not

transfer any timing information whatsoever.

They even compound this disadvantage with

timing jitter and wander errors.

By using advanced clock recovery algorithms,

RADs pseudowire gateways recover the clock

information transported over the packetnetwork, achieving the desired timing accuracy

of within 50 parts per billion over their lifetime,

complying with the ITU-T G.823 and G.824

specifications in the presence of packet delay

variation and packet loss. RADs pseudowire

gateways also conform to the ITU-T G.8261

standard, defining accuracy criteria for clock

transport over packet networks.

clock distribution and recovery over the packet switched network. The solution offered

by RAD is based on pseudowire service emulation, in which the GSM/CDMA and UMTS/

EV-DO traffic is tunneled transparently from the base station to the BSC and RNC.

Pseudowire technology is implemented in small, dedicated, multiservice devices located

at the cell site and in pseudowire gateways deployed at the switching centers.

Why Use Pseudowire?

Synchronization and Clock Recovery


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HSxPACore transport networks are often complemented in the Last Mile by DSL access network

especially where fiber is unavailable. In such situations the access network is based on

SHDSL or ADSL lines and DSLAMs. Many service providers are interested in using their

popular and ubiquitous copper infrastructure for RAN backhaul to generate additional

revenues. For their part, mobile operators can benefit from reduced Last Mile backhau

costs since DSL tariffs generally run lower than leased lines. RADs integrated access

devices (IADs) enable mobile network operators to use the existing DSLAM infrastructu

for both GSM/CDMA and UMTS/EV-DO backhaul and, if they are building out their ow

networks, to lease resources to corporate and enterprise customers for delivering Ethern

services.

DSL Transport

Leverage Copper Using DSL

LA-130DSL Cell-Site Gateway

j Designed for deployment at base station

sites for cellular backhaul over DSL

j Transports TDM and ATM-based services

over packet-based or ATM networks

j Supports IMA over SHDSL and ADSL2+

for HSDPA traffic

j Multiple E1 and Ethernet ports

Mobile Backhaul over DSLInfrastructure


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High Speed Packet Access(HSDPA and HSUPA)By delivering speeds comparable to or better than fixed-line

broadband access systems up to 14.4 Mbps peak air throughput

per user HSDPA promises to transform cellular telephony. HSDPA

offers anytime, anywhere broadband mobile access. HSDPA has

the capacity and throughput to exploit the full potential of 3G,

lowering the cost per Megabyte of traffic to enable new bundled

services and applications at competitive monthly rates. Such high

capacity performance, however, comes at a price: an exponential

increase in the bandwidth required to backhaul cellular traffic from

the Node Bs to the RNC (radio network controller). Assuming that

the requisite additional E1/T1 lines were readily available

(approximately 16 E1/T1s per Node B) from the landline operator,

they would be cost-prohibitive and impose a stiff Opex barrier.

This would bring into question the entire business case for high

speed W-CDMA.

The steady transition in the field to IP DSLAMs on the one hand,

and the successful implementation of pseudowire devices for

cellular backhaul over DSL on the other, have combined to enable

W-CDMA operators to consider the option of using lower-cost

broadband networks in the backhaul. In practice, this option is

made more attractive by separating the DCH real-time traffic from

the best-effort HSDPA traffic at the Node Bs and conveying them

over different links. DCH can be carried over existing TDM leased

lines or ATM circuits while HSDPA can be transported across

broadband DSL. To achieve this virtual divergence to different

physical paths (TDM and DSL) requires a dedicated device such as

RADs cell-site gateways that can perform pseudowire tunneling

of the ATM HSDPA traffic over Ethernet and a pseudowire RNC-

site gateway after the IP DSLAM to reconstruct the ATM connections

at the RNC.

Many DSL flavors are being considered as the preferred Last Mile

technology to accept the challenge of increased bandwidth for

both HSDPA and HSUPA. Regardless of the physical layer, pseudowire

technology is required to introduce the next-generation DSLAMs

into the RAN.

HSDPA Hybrid Backhaul Solution

ACE-3600RNC-Site Gateway

j Aggregation device and gateway for 3G/HSDPA

j Supports ATM over Gigabit Ethernet using pseudowire technology

j Full system redundancy

Latin America North America Asia Pacific

Central Europe and Africa Western Europe

Total Mobile Traffic

Millions of Terabytes (Voice and Data)

1,0

0,8

0,6

0,4

0,2

0,02000 2001 2002 2003 2004 2005 2006 2007 2008


8/12AT

Multiple Service Aggregation for TDM and

ATM Transport NetworksTDM-based networks E1/T1s connecting to SDH/SONET rings

continue to be the mainstay transport infrastructure for cellular

backhaul. This is particularly the case if the mobile operator is

licensed only for 2G or has not rolled out a 3G network. Even for

those operators co-locating 2G base stations with ATM interfaces

on their 3G Node Bs as specified by 3GPP UMTS Rel.99, TDM-

based networks are suitable. Thus, to lower operating expenses,

the same TDM transport infrastructure may be used for both

generations. This holds true even for outlying areas, accompanyin

lower density traffic flows. RAD offers a wide range of multiservic

access concentrators that support aggregation of TDM traffic as

well as E1/T1 UNIs and IMA, for more efficient utilization of the

SDH/SONET infrastructure.

Multiservice Aggregation over SDH/SONET


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ACE-3402

Multi-Generation Cell-Site Gatewayj Aggregation device and gateway for

2G/3G/HSDPA cellular access/backhaul

j Supports ATM and Ethernet/IP uplink with

pseudowire technology

j Reduces Opex by aggregating multiple

TDM/ATM interfaces onto IMA,

Channelized STM-1/OC-3 or Gigabit

Ethernet

j High precision clock recovery compliant

with ITU G.823/G.824 specs

Because 3GPP specifications define the RAN elements as ATM, mobile operators have every

incentive to avail themselves of service providers ATM networks and their built-in Quality of

Service (QoS) capabilities, which offer traffic prioritization, service differentiation and networkengineering features. Moreover, ATM is also standardized to map TDM and Ethernet traffic

flows efficiently. By deploying multiservice access concentrators to aggregate 2G and 3G voice

and data streams over a single ATM backhaul network, mobile operators can realize numerous

benefits:

j Elimination of multiple long-distance leased lines

j Cost-effective use of RNC resources by freeing up dedicated multiple E1/T1 ports on the

radio equipment for a single STM-1/OC-3 port

j Fail-safe re-route of RNC traffic

Needless to say, carriers with ATM networks stand to gain by generating new revenues from

backhaul services while preserving their investment in existing infrastructure.

ACE-3400

Multi-Generation Cell-Site Gatewayj Aggregation device and gateway for

2G/3G/HSDPA cellular access/backhaul

j Supports ATM and Ethernet/IP uplink with

pseudowire technology

j Reduces Opex by aggregating multiple

TDM/ATM interfaces onto IMA, multiple

E1/T1/J1, STM-1/OC-3 or Gigabit Ethernet

j High precision clock recovery compliant

with ITU G.823/G.824 specs


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Compression and Optimization in

GSM NetworksVoice Trunking for Inter-MSC Connectivity

Inter-MSC (E channel) trunking is one of the main contributors to transmission expenses

in a cellular network. Typically, hundreds of long haul links are used to transport traffic

between voice switches, in meshed, star or mixed network topologies. Reducing the

number of links translates into immediate savings on operating costs. Because the payload

of inter-MSC transmission is voice traffic, standard voice compression technology is the

simplest and easiest way to slash the amount of bandwidth required for trunking. RADs

compressed voice system can take a full E1/T1 circuit and reduce it to 128 kbps, or

squeeze 16 full E1/T1 lines and associated signaling into a single E1/T1 circuit over TDM

or Ethernet/IP links.

Gmux-2000Carrier-Class Voice Trunking Gateway

j Modular, high capacity voice compression and trunking gateway for transporting

multiple PDH/SDH links over TDM, IP and MPLS networks

j Transports a full STM-1 or up to 112 E1s over seven E1s or Gigabit Ethernet

j Seamless migration from TDM networks to IP networks

j Bandwidth compression up to 16:1 using TDMoIP multiplexing technology

j Optimizes bandwidth required for signaling channels

Abis Ate


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Optimization of Abis/Ater, A and E Backhaul Links

Abis/Ater Protocol Optimization(and future 3G data compression)

The base station system (BSS) in any given

GSM network is comprised of a large

number of base stations linked to base

station controllers (BSC) over an Abis/Ater

interface. The Abis/Ater interface transports

signaling protocols as well as compressed

voice. Because further compression of the

voice traffic is not applicable, the best way

to reduce bandwidth is to optimize the

Abis/Ater protocol running over the RAN.

This allows the operator to minimize thenumber of leased lines required for backhaul

and to avoid having to add lines to satisfy

an increase in incremental capacity.

Compressed Abis/Ater traffic can be

optimized by eliminating redundant silence

and idle frames, resulting in more efficient

use of backhaul links and reducing the

bandwidth required over leased lines,

satellite links and microwave.

RADs Vmux Abis/Ater protocol optimization

gateways streamline the Abis/Ater data

flow and also reduce the number of E1

trunks required for BTS-BSC connectivity.

Alternatively, these devices enable

connectivity over Ethernet/IP links. Average

bandwidth savings reach 50 percent and

more. The additional leased line capacity

freed up by Abis/Ater optimization can also

be used to handle 3G traffic flows.

In addition to the Vmux optimization

gateways, RADs ACE-3200 multiservice

access concentrator and ACE-3400

multiservice aggregation unit are engineered

to support Abis/Ater optimization.

Following a similar path, 3G data will be

compressed to achieve higher backhaul

bandwidth efficiency, allowing the mobile

operators to control the increase in their

transport requirements.

Vmux-2100Voice Trunking Gateway

j Compresses up to 16 full E1/T1 lines

(496/384 voice channels) over a single

E1/T1, serial or 10/100 Mbps Ethernet

uplink

j High quality voice; reduces bandwidth

and leased line costs

j Converges voice, fax, data, and modem

services, reducing infrastructure costs

j Transparent to all signaling protocols

and LAN

Vmux-420GSM Abis/Ater Optimization Gateway

j Connects up to 12 E1 voice trunks over

E1 or 10/100 Mbps Ethernet uplinks

j

Up to 3:1 bandwidth optimization withdata optimization

j Full redundancy, cross connect/grooming

supported

j Precise clock regeneration over Ethernet

uplink (no GPS required)


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The RAD name, logo, logotype, and TDMoIP are registered trademarks of RAD Data Communications Ltd. ACE, Gmux, IPmux, and Vmux are trademaRAD Data Communications Ltd. 2007 RAD Data Communications Ltd. Specifications are subject to change without prior notification. All rights resCatalog number 802374 Version 02/07

www.rad.com www.rad-cellular.com

Innovative Access Solutions

Local Offices

Brazil

RAD do Brasil Ltda.

Ferreira de Souza, 107 - Vila Olmpia

So Paulo - SP 04544-100

Brazil

Tel: 55-11-3045-2523

Fax: 55-11-3045-3257

email: [email protected]

www.radbr.com.br

China

RAD China (Beijing)

Grand Pacific Building, Suite 530

No. 8, Guanghua Road

Beijing 100026, China

Tel: 86-10-65816677

Fax: 86-10-65810588email: [email protected]

www.raddata.com.cn

RAD China (Shanghai)

Unit 11, 16/F, Central Plaza

227 Huangpi Road N.

Shanghai 200003, China

Tel: 86-21-63758691/2

Fax: 86-21-63758693


www.raddata.com.cn

France

RAD France

Vecteur Sud - Bat A

1er tage

70-86, Avenue de la Rpublique

92320 Chatillon, France

Tel: 33-1-41 17 41 80

Fax: 33-1-41 17 41 81


www.rad-france.fr

Germany

RAD Data Communications GmbH

Otto-Hahn-Str. 28-30

85521 Ottobrunn-Riemerling

Germany

Tel: 49-89-665927-0

Fax: 49-89-665927-77


www.rad-data.de

India

RAD Data Communications Pvt. Ltd.

407, Madhava, Plot No. C-4, E-Block

Bandra-Kurla Complex

Bandra (East) Mumbai 400 051

India

Tel: 91-22-65-200200

Fax: 91-22-30-683687email: [email protected]

www.radindia.in

Japan

RAD Japan K.K.

Bureau Toranomon 10F

2-7-16 Toranomon, Minato-ku

Tokyo, Japan

Tel: 81-3-5251 3651

Fax: 81-3-5251 3652


www.raddata.co.jp

Russia

RAD Data Communications Ltd.

10, B. Tulskaya St., Building 9

Floor 7, Office 9705

Moscow, 115191, Russia

Tel: 7-495-231-1239

Fax: 7-495-231-1097


www.rad.ru

United Kingdom

RAD Data Communications Ltd. (UK)

6 Fortuna Court, Calleva Park

Aldermaston, Berkshire RG7 8UB

England

Tel: 44-1189-820900

Fax: 44-1189-812600


www.raddata.co.uk

International Headquarters

RAD Data Communications Ltd.

24 Raoul Wallenberg Street

Tel Aviv 69719, Israel

Tel: 972-3-6458181

Fax: 972-3-6498250


www.rad.com

North America Headquarters

RAD Data Communications, Inc.

900 Corporate Drive

Mahwah, NJ 07430, USA

Tel: 1-201-529-1100

Toll free: 1-800-444-7234

Fax: 1-201-529-5777


www.radusa.com

Regional Offices

Far East

RAD Far East Ltd.

Suite A, 26/F, One Capital Place

18 Luard Rd., Wanchai

Hong Kong, China

Tel: 852-25270101

Fax: 852-25284761


Latin America

RAD Amrica Latina S.A.

Arvalo 2774, Floor 6

1426 Buenos Aires, Argentina

Tel: 54-11-4779-1117

Fax: 54-11-4771-0460


www.rad-espanol.com

Oceania

RAD Australia Pty. Ltd.

434 St Kilda Rd, Suite 412

Melbourne, Victoria 3004, Australia

Tel: 61-3-9820-2575

Fax: 61-3-9866-7566


www.raddata.com.au

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2970_Optimized Mobile Transport Solution

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