Cellular Backhaul - connectdata.fr filesufficient to service 2G and some 3G traffic, ... bandwidth...

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70 RAD Data Communications 2009 Catalog

The expected bandwidth upsurge associated with the rollout of new mobile broadband and 4G services shifts the transport burden to the raN (radio access network) backhaul – the connections between the base stations and their controllers. While in the past a small number of e1/T1 links were sufficient to service 2G and some 3G traffic, the bandwidth requirements of hSPa, 3GPP’s uTraN lTe and Mobile WiMaX are of a different scale altogether, leading cellular operators to re-evaluate their backhaul strategy.

Fierce competition is another major factor in the changing

landscape of cellular backhaul; one which prevents

operators from passing on the costs related to capacity

enhancements to the mobile users, who expect more

bandwidth and higher quality at lower service rates. The

key to successfully controlling the growth in mobile traffic

is in decoupling bandwidth from cost, by optimizing

transport capacity and migrating to cost-effective

backhaul technologies, such as Carrier Ethernet, IP, MPLS,

and DSL. As a result, current industry consensus identifies

future-proof all-IP RANs as a necessity.

However, while the transition to packet technology is

already under way, it nevertheless poses some major

challenges for mobile operators and transport providers

who need to simultaneously ensure service continuity for

legacy 2G (TDM) and 3G (ATM) traffic, while guaranteeing

quality requirements for emerging data-intensive and rich-

media applications. Service quality is of particular

importance in Ethernet, IP and MPLS networks as they

inherently introduce impairments, such as packet delay,

delay variation and packet loss. For packet transport to

meet the “SDH/SONET or better” performance levels that

are required for mobile networks, accurate and efficient

implementations of resilient clocking and synchronization

schemes are a must.

RAD’s ACE-3xxx multiservice gateways (see pages 72-81)

and Vmux-4xx Abis optimization gateways (see pages

82-83) enhance throughput and allow a smooth

transition to next-generation backhaul, while minimizing

capital investments and shortening service rollout times.

Flexible migration paths

RAD’s portfolio of cell-site and aggregation site gateways

offers flexible migration paths to IP backhaul using any

available infrastructure, including ATM, SDH/SONET and

DSL. They enable convergence of multi-generation traffic

over a unified, packet switched network (PSN), or the use

of a hybrid of two traffic-dedicated transport routes,

whereby real-time voice and video are carried over

existing SDH/SONET or ATM backbones, while UMTS and

HSPA data traffic is delivered over a PSN, using

pseudowire encapsulation.

The latter approach, also known as “HSDPA Offload,”

allows operators to begin capitalizing on packet

transport’s economical benefits, while continuing to

utilize legacy infrastructure and ensuring stringent quality

of service (QoS) for delay-sensitive services.

Multiservice gateways, multi-standard pseudowire modes

The ACE-3xxx series delivers 2G TDM, 3G ATM and

Ethernet traffic over any transport network, efficiently

handling real-time voice and best-effort data with cross-

generation support, regardless of the underlying physical

layer. Incorporating ASIC design with TDM and ATM

pseudowire standards, the devices have enhanced OAM

and QoS capabilities which maintain uniform, high

performance service delivery and backward compatibility

for legacy service continuity over new networks. This

allows operators to amortize their large TDM and ATM

installed-base while moving to next-generation services

and enable interoperability in multi-vendor environments.

high precision synchronization over packet

The ACE-3xxx gateways enable high performance, robust

synchronization over packet switched transport, to

eliminate the risk of service disruptions and impaired call

hand-offs that may result from inherent inaccuracies.

Employing state-of-the-art clock recovery and distribution

schemes, such as IEEE 1588v2 precision time protocol

(PTP), ITU-T G.8262 Synchronous Ethernet, NTR (network

timing reference) over SHDSL, and adaptive clock recovery

(ACR), RAD’s RAN gateways support definite frequency

2Cellular Backhaul

271RAD Data Communications 2009 Catalog

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accuracy limits for various services, such as +/- 16 ppb (parts per billion)

for 2G CDMA and 3G UMTS. They also ensure compliance with G.823/824

synchronization interface requirements per G.8261 specifications, support

enhanced holdover mode, and guarantee QoS priorities for clock traffic.

Backhaul over DSlaM infrastructure

RAD Data Communications has been among the first to leverage wide-

spread DSLAM deployments for economical cellular transport where fiber is

not available. The ACE-3xxx gateways support multiple xDSL flavors,

including ADSL2/2+ and SHDSL.bis with EFM (Ethernet in the First Mile),

IMA or M-Pair bonding. In addition, they offer software upgrades to include

VDSL capabilities. Such comprehensive functionality presents a convenient

solution not only for operators looking for an interim access solution, but

also for operators seeking to reduce their dependency on third-party

providers as part of a long-term strategy for self-sufficiency.

abis bandwidth optimization

RAD’s Vmux-4xx gateways enable operators to improve GSM backhaul

efficiency where bandwidth is constrained or expensive, such as over

international leased lines, satellite and microwave links. In addition to

multiplexing traffic from underutilized E1 circuits, these gateways employ

voice activity detection and silence suppression techniques to optimize the

Abis interface and reduce the number of E1 trunks required for BTS-BSC

(base station to base station controller) backhaul by 50% and more, freeing

up the connection for additional traffic or next-generation services. These

capabilities are also featured in RAD’s ACE-3xxx portfolio.

2

BSC/RNC

TDM/ATM/IPbackbone

Voice trunking

Mobile Core Network

Radio Access Network

MSC

PDH/SDH/SONET/ATM

DSL/ETH/IP/MPLSTransport Network

BTS/Node B

BTS/Node B

BTS/Node B

Aggregation

Connectivity & intelligentdemarcation (fiber,bonded TDM, DSL)

Trafficoptimization

MSC

MSC

BTS/Node B

Pseudowire(ETH/IP/MPLS/DSL)

BTS/Node B

BTS/Node B

Voice trunking

Voice trunking

Backhaul overwireless

Backhaul overwireless

Cellular backhaul solutions over any network


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ACE-3800Aggregation-Site Gateway

Advanced pseudowire, QoS and OAM features

The ACE-3800 enables operators to converge

multi-generation traffic, including voice, data

and HSPA services, over an all-IP RAN by using

TDM, ATM and Ethernet pseudowire (PW)

encapsulation. These are enhanced with various

QoS schemes, including VLAN priority (802.1p),

EXP, or ToS/DSCP, as well as comprehensive

monitoring and diagnostic capabilities, including

pseudowire VCCV-BFD, IP-BFD and ITU-I.610 ATM

OAM. In addition, the ACE-3800 supports

Ethernet pseudowires over MPLS per RFC 4448

and end-to-end redundancy for PW service

protection.

The advanced ATM shaping and scheduling

capabilities of the ACE-3800 permit operators

to implement overbooking strategies, enabling

them to optimize network utilization, conserve

existing resources and reduce the number of

leased services required to support their

network.

Typical applications for RAD’s aggregation site

gateways include grooming ATM traffic and

aggregating VC-12/VT1.5 circuits into a single

IMA, channelized STM-1/OC-3 or Gigabit

Ethernet uplinks. Additionally, it aggregates TDM

(CES) or ATM (UNI/IMA) E1/T1 traffic over STM-1/

OC-3c links.

Full range of standard synchronization options

The ACE-3800 is designed to provide highly

accurate synchronization over packet transport

and meet the key requirements for cellular

backhaul, such as +/-16 ppb (parts per billion)

frequency accuracy with enhanced

synchronization features.

The clock can be recovered either from the TDM

links or from the GbE links, using PTPv2 (IEEE

1588v2), G.8262 Synchronous Ethernet or

adaptive clock recovery (ACR). In addition, the

ACE-3800 features a built-in BITS interface with

dedicated station clock support.

The ACE-3800 also enables packet timing

distribution over the packet network, to be

regenerated at the remote sites.

SNMP management

The ACE-3800 features flexible management

capabilities, including local management via an

ASCII terminal (RS-232). In addition, remote

management can be performed either inband or

out-of-band, using the network or user ports,

or the dedicated management port. Advanced

FCAPS (Fault, Configuration, Accounting,

Performance, Security) and diagnostic tools are

provided by RADview-EMS, RAD’s carrier-class

element management system, via an SNMP-

based GUI.

The ACE-3800 also supports a variety of

configuration access channels, including CLI over

Telnet, SNMP, Web server, and TFTP.

Incorporated security features include Secure

Shell (SSH), Web-based Secure Socket Layer

(SSL), SNMPv3, and RADIUS, as well as

management access control list (ACL).

The ACE-3800 is a 4U-high, 19-inch chassis

with a rack-mount option. Its compact

dimensions enable easy installation in limited

spaces.

• Multiservice support for ATM, TDM and Ethernet traffic delivery over packet networks

• Modular carrier-grade platform with full system redundancy

• Multi-standard pseudowire encapsulation over Ethernet, IP and MPLS networks

• Highly accurate clock distribution and regeneration using major industry standards

• ATM switching and traffic management

• Advanced management system

• Designed for 3GPP/LTE and WiMAX

For latest updates visit www.rad.com

RAD’s ACE-3800 is a carrier-class multiservice

aggregator, specifically designed to accommodate

the rapid expansion in cellular traffic resulting

from the widespread deployment of new mobile

broadband services. It ensures the most

economical allocation of backhaul resources in

delivering GSM, UMTS and next-generation

3GPP/LTE traffic over ATM, SDH/SONET and packet

networks. Typically located at hub sites or

BSC/RNC sites, the ACE-3800 works opposite the

ACE-310x and ACE-32xx cell-site gateways.

The ACE-3800 is a modular platform housing a

variety of interfaces, including E1/T1, STM-1/OC-3c

UNI, channelized STM-1/OC-3, FE, and GbE. Its

advanced carrier-grade features include full

system, power and link redundancy for enhanced

service protection.


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Traffic delivery from 2G BTS, Node B and IP Node B, using PSN backhaul and BSC/RNC aggregation

ACE-3800

GbE

2G BTS

n x E1/T1

RNC

BSC

n x E1/T1 TDM

STM-1/OC-3cGbE

TDM FEn x IMA

n x SHDSLADSL2+/VDSL2

3G Node B

n x E1/T1 IMA

IP Node B

ACE-310x/ACE-32xxETH

Ch. STM-1/OC-3PSN

Ethernet/IP/MPLS

n x E1/T1

Cellular backhaul multiservice hub-site aggregation for PSN access using a variety of First Mile technologies

Aggregation Site

RNC

BSC

n x E1/T1 TDM

STM-1/OC-3c

GbEn x E1/T1 IMA

Ch. STM-1/OC-3

Aggregationswitch

GbEPSNEthernet/IP/

MPLS

2G BTS

n x E1/T1

TDM

ACE-3800

GbEGbE

2G BTS

n x E1/T1

TDM

Microwave

Microwave

2G BTS

n x E1/T1

TDM

3G Node B

n x E1/T1

IMA

Ethernet orTDM

Leased Lines

n x E1/T1

Ch. STM-1/OC-3

E1/T1s

IP Node B

FE

2G/3GIP Node B

n x E1/T1 orETH

ETH

Hub Site


ACE-3400, ACE-3402Aggregation-Site Gateways

flexibility, the ACE-3400 and ACE-3402 are

modular platforms housing a variety of

interfaces, including E1/T1, STM-1/OC-3c UNI,

channelized STM-1/OC-3, FE, and GbE.

Advanced pseudowire, QoS, and OAM features

The ACE-3400 and ACE-3402 enable operators

to converge multi-generation traffic, including

voice and HSPA services, over an all-IP RAN by

using IMA/UNI or standards-based CES/SAToP

pseudowire (PW) encapsulation. These are

enhanced with various QoS schemes, including

VLAN priority (802.1p), EXP or ToS/DSCP, as well

as comprehensive monitoring and diagnostic

capabilities, including pseudowire VCCV-BFD and

ITU-I.610 ATM OAM. In addition, they support

Ethernet pseudowires over MPLS per RFC 4448

and end-to-end redundancy for PW service

protection.

The advanced shaping and scheduling

capabilities of the ACE-3400 and ACE-3402

permit operators to implement overbooking

strategies, enabling them to optimize network

utilization, conserve existing resources and

reduce the number of leased services required

to support their network.

Typical applications for RAD’s aggregation site

gateways include grooming ATM traffic and

aggregating VC-12/VT1.5 circuits into a single

IMA, channelized STM-1/OC-3 or Gigabit

Ethernet uplinks. Additionally, the ACE-3400

aggregates TDM (CES) or ATM (UNI/IMA) E1/T1

traffic over STM-1/OC-3c links.


The ACE-3400 and ACE-3402 are designed to

provide highly accurate synchronization over

packet transport and meet the key requirements

for cellular backhaul, such as +/-16 ppb (parts

per billion) frequency accuracy, with enhanced


The ACE-3400 and ACE-3402 also enable packet

timing distribution, using ACR ordinary clock

master, as well as physical clock distribution via

the TDM and Ethernet links.

SNMP management

The ACE-3400 and ACE-3402 feature flexible

management capabilities, including local

management via an ASCII terminal (RS-232). In

addition, remote management can be performed

either inband or out-of-band, using the network

or user ports, or the dedicated management

port. Advanced FCAPS (Fault, Configuration,

Accounting, Performance, Security) and

diagnostic tools are provided by RADview-EMS,

RAD’s carrier-class element management

system, via an SNMP-based GUI.

The ACE-3400 and ACE-3402 also support a

variety of configuration access channels,

including CLI over Telnet, SNMP, Web server, and

TFTP. Incorporated security features include

Secure Shell (SSH), Web-based Secure Socket

Layer (SSL), SNMPv3, and RADIUS, as well as


The ACE-3400 and the ACE-3402 fit 19-inch

racks and enable easy installation in limited

spaces.




• Highly accurate clock distribution from BSCs/RNCs to cell sites and hub sites over packet




ACE-3400


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RAD’s ACE-3400 and ACE-3402 are carrier-class

multiservice aggregators, specifically designed to

accommodate the rapid expansion in cellular

traffic resulting from the widespread deployment

of new mobile broadband services. They ensure

the most economical allocation of backhaul

resources in delivering GSM, UMTS and next-

generation 3GPP/LTE traffic over ATM, SDH/SONET

and packet networks. Typically located at hub sites

or BSC/RNC sites, they work opposite the

ACE-310x and ACE-32xx cell-site gateways.

Their advanced carrier-grade features include full

system, power and link redundancy for enhanced

service protection. Featuring Any-Service-Any-Port

Features ACE-3400 ACE-3402

E1/T1 interfaces P P

STM-1/OC-3c UNI interfaces P P

Channelized STM-1/OC-3 interfaces P P

Gigabit Ethernet interfaces P P

Management Fast Ethernet interface P P

Height 3U 2U


ACE-3400ACE-3402

2G BTS

3G Node B

ACE-32xxACE-310x

GbEFE

IMAATM

E1/T1TDM

n x E1/VC12or

n x T1/VT1.5

STM-1/OC-3c ATMNetwork

TDMNetwork

Emulated service

PacketSwitchedNetwork

Aggregation at the controller site

Emulated TDM and ATM service

2G BTS

STM-1/OC-3c

2G BSC

E1/T1UNI

3G Node B

3G Node B

2G BTS

E1/T1TDM

n x E1/T1IMA

E1/T1TDM

3G RNC

n x E1/T1TDM

n x E1/T1UNI/IMA

ACE-3400STM-1/OC-3c

1+1APS

ATMNetwork

ACE-3402

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S The ACE-3600 is a modular platform housing a

variety of interfaces, including STM-1/OC-3c UNI,

FE, and GbE. Its advanced carrier-grade features

include full system, power, link, and module

redundancy for enhanced service protection.

Advanced pseudowire, QoS and OAM features

The ACE-3600 enables operators to converge

multi-generation traffic, including voice and

HSPA services, over an all-IP RAN by using

standard ATM pseudowire (PW) encapsulation

per RFC 4717. These attributes are enhanced

with various QoS schemes, including VLAN

priority (802.1p), EXP or ToS/DSCP, as well as

comprehensive monitoring and diagnostic

capabilities, including pseudowire VCCV-BFD and

ITU-I.610 ATM OAM. In addition, the ACE-3600

supports Ethernet pseudowires over MPLS per

RFC 4448 and end-to-end redundancy for PW

service protection.

The advanced shaping and scheduling






network.






frequency accuracy with enhanced



distribution, using ACR ordinary clock master, as

well as physical clock distribution via the TDM

and Ethernet links.

SNMP management





out-of-band, using the network or user ports,

or the dedicated management port. Advanced





based GUI.








The ACE-3600 is a 2U-high, 19-inch chassis with

a rack-mount option. Its compact dimensions

enable easy installation in limited spaces.

• Multiservice support for ATM and Ethernet traffic delivery over packet networks



• Highly accurate clock distribution from RNCs to cell sites and hub sites over packet




FE GbE

ACE-3600

IMAATM

3G Node B RNC

(4+4) x STM-1/OC-3cPacketSwitchedNetworkACE-32xx

ACE-310x

Radio-site aggregation over packet switched network

ACE-3600RNC-Site Gateway


RAD’s ACE-3600 is a carrier-class multiservice

aggregator, specifically designed to accommodate

the rapid expansion in cellular traffic resulting

from the widespread deployment of new mobile

broadband services. It ensures the most

economical allocation of backhaul resources in

delivering UMTS, HSPA and next-generation 3GPP/

LTE traffic over packet networks. Typically located

at RNC sites, the ACE-3600 works opposite the

ACE-310x and ACE-32xx cell-site gateways and

aggregates STM-1/OC-3c (ATM) traffic over

Ethernet, IP or MPLS networks.


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• Two modular uplink interfaces supporting DSL and Ethernet

• Highly accurate clock regeneration using major industry standards



• Abis optimization

• Interoperable with BSS from major vendors


• Optional temperature-hardened enclosure


RAD’s ACE-3220 multiservice cell-site gateway

is specifically designed to accommodate the

rapid expansion in cellular backhaul traffic

resulting from the widespread deployment of

new mobile broadband services. It simplifies

service provisioning and control by enabling

simultaneous delivery of GSM, UMTS and next-

generation 3GPP/LTE traffic over the same

transport network. Working opposite the

ACE-340x, ACE-3600 and ACE-3800

aggregation-site gateways, the ACE-3220

minimizes capital investment and shortens

service rollout times by leveraging available

ATM, SDH/SONET and DSL infrastructure to

access high capacity, economical packet

switched transport networks.

In addition, the ACE-3220 enhances throughput

in 2G networks via GSM Abis interface

optimization.

Any-Service-Any-Port flexibility

The ACE-3220 allows operators to use a variety

of interfaces:

• Eight or 16 ATM UNI/IMA/TDM E1/T1 ports

• Optional STM-1/OC-3c ATM port

• Four UTP/SFP Fast Ethernet ports

In addition, it accommodates up to two

modular interfaces, including:

• Two ADSL2+/VDSL2* ports

• Four SHDSL ports (IMA, M-pair and EFM)

• Single Gigabit Ethernet port

Advanced QoS, pseudowire and OAM features







network.

The device also enables operators to converge

multi-generation traffic over an all-IP RAN by


pseudowire (PW) encapsulation, as well as

Ethernet to ATM bridging according to RFC

2684. These are enhanced with various QoS

schemes, including VLAN priority (802.1p), EXP

or ToS/DSCP, as well as comprehensive

monitoring and diagnostic capabilities, including

pseudowire VCCV-BFD and ITU-I.610 ATM OAM.

In addition, the ACE-3220 supports Ethernet

pseudowires over MPLS per RFC 4448 and end-

to-end redundancy for PW service protection.






frequency accuracy. The clock can be recovered

either from the TDM links or from the DSL and

GbE links, using PTPv2 (IEEE 1588v2), G.8262

Synchronous Ethernet, NTR recovered clock over

SHDSL, or adaptive clock recovery (ACR). In

addition, the ACE-3220 features a built-in input

clock interface.


distribution, using ACR or PTPv2 (IEEE 1588v2),

as well as physical clock distribution via the

TDM and Ethernet links.

SNMP management




management can be performed either inband

or out-of-band, using the network or user

ports. Advanced FCAPS (Fault, Configuration,

Accounting, Performance, Security), and

ACE-3220Cell-Site Gateway

diagnostic tools are provided by RADview-EMS,

RAD’s carrier-class element management system,

via an SNMP-based GUI.



Telnet, SNMP, Web server, and TFTP. Incorporated

security features include Secure Shell (SSH), Web-

based Secure Socket Layer (SSL), SNMPv3, and

RADIUS, as well as management access control

list (ACL).

* Requires software upgrade

RNC

BSC

n x E1/T1 TDM

STM-1/OC-3c

n x E1/T1 IMA

Ch. STM-1/OC-3cSDH/SONET/ATM Network

ACE-34xx/ACE-3600/ACE-3800

ACE-3220

STM-1/OC-3cn x SHDSL

IP Node B

n x E1/T1IMA

n x E1/T1TDM

BTS

Node B FE

ATM orPacket

TransportNetwork

GbEADSL2+/VDSL

FE/GbE

VoiceHSDPA

DSLAM

DSLAM

n x IMA

GbE

HSDPA offload over ADSL2+ using the ACE-3220


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ACE-3100, ACE-3200Cell-Site Gateways

The ACE-3100 and ACE-3200 incorporate

flexible port configuration to allow aggregation

of circuit-emulated (CES) TDM E1/T1s, fractional

E1/T1 UNIs or several IMA links into a single

IMA, STM-1/OC-3c or Fast Ethernet network

interface.

In addition, the ACE-3200 enhances throughput

in 2G networks by optimizing the GSM Abis

interface.









The devices also enable operators to converge




Ethernet to ATM bridging according to RFC 2684.

These are enhanced with various QoS schemes

for delivering ATM and TDM traffic over Layer 2

and Layer 3 networks, including VLAN priority

(802.1p), EXP or ToS/DSCP. Comprehensive

monitoring and diagnostic capabilities include

pseudowire VCCV-BFD and ITU-I.610 ATM OAM.

In addition, the devices support Ethernet

pseudowires over MPLS per RFC 4448 and end-

to-end redundancy for PW service protection.






per billion) frequency accuracy. The clock can be

recovered from either the TDM links or from the

Ethernet links, using PTPv2 (IEEE 1588v2) or

adaptive clock recovery (ACR).

SNMP management






or user ports. Advanced FCAPS (Fault,

Configuration, Accounting, Performance,

Security) and diagnostic tools are provided by

RADview-EMS, RAD’s carrier-class element

management system, via an SNMP-based GUI.









• Any-Service-Any-Port flexibility




• Abis optimization



ACE-3100

Multiservice support for ATM, TDM and

ACE-3100


RAD’s ACE-3100 and ACE-3200 multiservice cell-

site gateways are specifically designed to


backhaul traffic resulting from the widespread

deployment of new mobile broadband services.

They simplify service provisioning and control by

enabling simultaneous delivery of GSM, UMTS and

HSPA traffic over the same transport network.

Working opposite the ACE-340x, ACE-3600 and

ACE-3800 aggregation-site gateways, the

ACE-3100 and ACE-3200 minimize capital

investment and shorten service rollout times by

leveraging available ATM and SDH/SONET

infrastructure to access high capacity, economical

packet switched transport networks.

ACE-3200 ACE-3100

E1/T1 ports 8 or 16 0 or 4

ATM-155 ports 0 or 2 1 or 2

Fast Ethernet ports 2 for PSN traffic 2 for PSN traffic

and/or inband and/or inband

management management

Abis optimization Up to 6 E1 ports

Power supply Single/dual, fixed Single, fixed


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Cellular backhauling over ATM using ACE-3200

STM-1/OC-3c

2G BSC

E1/T1UNI

3G Node B

3G Node B

E1/T1TDM

n x E1/T1IMA

E1/T1TDM

ATMNetwork

3G RNC

n x E1/T1TDM

n x E1/T1UNI/IMA

STM-1/OC-3c

1+1APS

ACE-3200

2G BTS

IP Node B

FE

CES over ATM (2G)

2G BTS

Emulated TDM and ATM services

ACE-340x/ACE-3800

GbE

2G BTS

n x E1/T1 TDM

RNC

BSC

n x E1/T1 TDM

STM-1/OC-3c

GbEn x E1/T1 IMA

PSNEthernet/IP/

MPLS

FE

3G Node B

IP Node B

ACE-3100/ACE-3200

ETH

Ch. STM-1/OC-3

Cell-sitegateway

n x E1/T1 IMA

Cellular backhauling over PSN using ACE-3100/ACE-3200

ACE-3200


ACE-3105, ACE-3205Cell-Site Gateways

ACE-3105 and ACE-3205 minimize capital

investment and shorten service rollout times by

leveraging available DSL infrastructure to access

ATM, SDH/SONET and high capacity, economical

packet switched networks.

In addition, they enhance throughput in 2G

networks via GSM Abis interface optimization.









The devices also enable operators to converge




Ethernet to ATM bridging according to RFC 2684.

These are enhanced with various QoS schemes,

including VLAN priority (802.1p), EXP or ToS/

DSCP, as well as comprehensive monitoring and

diagnostic capabilities, including pseudowire

VCCV-BFD and ITU-I.610 ATM OAM.

In addition, the ACE-3105 and ACE-3205

support Ethernet pseudowires over MPLS per

RFC 4448 and end-to-end redundancy for PW

service protection.

The devices use PPP over Ethernet (PPPoE)

protocol to allow HSDPA connectivity in a variety

of DSL-based cellular backhaul applications.






per billion) frequency accuracy. The clock can be

recovered either from the TDM links or from the

DSL links, using PTPv2 (IEEE 1588v2), NTR

recovered clock over xDSL or adaptive clock

recovery (ACR).

SNMP management



















• Support ADSL2/2+, VDSL2* andSHDSL.bis (IMA, M-pair and EFM bonding)




• Abis optimization option



• Optional temperature-hardened enclosure


RAD’s ACE-3105 and ACE-3205 multiservice cell-

site gateways are specifically designed to


backhaul traffic resulting from the widespread

deployment of new mobile broadband services.

They simplify service provisioning and control by

enabling simultaneous delivery of GSM, UMTS and

HSPA traffic over the same transport network.

Working opposite the ACE-340x, ACE-3600 and

ACE-3800 aggregation-site gateways, the

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ACE-3205 ACE-3105

E1/T1 ports 8 or 16 0 or 4

xDSL modes ADSL2/2+ or VDSL2* ADSL2/2+ or VDSL2*

and SHDSL.bis or SHDSL.bis

ADSL2/2+ or VDSL2 (Annex A/B) ports 1 or 2 1

SHDSL.bis (Annex B+G, A+F) ports 4 4

Fast Ethernet (UTP or SFP) ports 2 for PSN traffic 2 for PSN traffic

and/or inband and/or inband

management management

Abis optimization Up to 6 E1 ports Up to 4 E1 ports

Power supply Single/dual, fixed Single, fixed


ACE-3105


ACE-3205

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RNC

BSC

n x E1/T1 TDM

STM-1/OC-3c

GbEn x E1/T1 IMA

Ch. STM-1/OC-3

ACE-340x/ACE-3800

GbE

2G BTS

n x E1/T1 TDM

n x SHDSL orADSL2+/VDSL2*

3G Node B

IP Node B

ACE-3105ETH

Cell-site DSLgateway

n x E1/T1 ATM IMA ATM orPacket Switched

Transport Network

ATM or IPDSLAM

RNC

BSC

n x E1/T1 TDM

STM-1/OC-3c

GbEn x E1/T1 IMA

Ch. STM-1/OC-3

SDH/SONET/ATM Network

ACE-340x/ACE-3600/ACE-3800

ACE-3205

STM-1/OC-3cn x SHDSL

IP Node B

n x E1/T1 IMA

n x E1/T1 TDM

BTS

Node B

FEATM orPacketTransportNetwork

GbEADSL2+/VDSL2*

VoiceHSDPA

n x IMA

DSLAM

DSLAM

Cellular backhauling hybrid solution

Cellular backhauling colocation over DSL solution


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• Installed in BTS sites to optimize Abis traffic

• The Vmux-425 can also be deployed in central locations connecting to several remote sites

• Up to 3:1 average bandwidth optimization

• Point-to-point and point-to-multipoint applications

• Full rate, enhanced full rate, half rate, and AMR support

• Compressed data, GPRS and dynamic EDGE support over multiple timeslots

• High precision clock recovery over packet


• Supports terrestrial, satellite and microwave connections


to the high cost of satellite and microwave

transmission, the Vmux-405 and Vmux-425 offer

quick return on investment.

Deployed in point-to-point and point-to-

multipoint topologies, a single Vmux-425 at the

BSC site supports up to six remote Vmux-405

units located at remote BTS sites. Alternatively,

the Vmux-405 and Vmux-425 can work opposite

the Vmux-445 at central locations (See page 83).

Third-party interoperability

The Vmux-405 and Vmux-425 also deliver

optimized data, GPRS and dynamic EDGE traffic

over multiple timeslots. They support all GSM

codecs, including FR, EFR, HR, and AMR. As

standard-based devices, they are interoperable

with equipment from major switch vendors,

such as Alcatel, Ericsson, Siemens, Huawei,

Nokia, and Motorola, thereby facilitating

connectivity in a multi-vendor environment.

Clock regeneration over Ethernet uplinks

The Vmux-405 and Vmux-425 incorporate

advanced clock recovery capabilities, to enable

accurate synchronization over packet transport.

The reliable regeneration of the TDM-based

clock enables the use of packet switched

networks to backhaul cellular voice traffic.

SNMP management

The Vmux-405 and Vmux-425 feature flexible










The Vmux-405 and Vmux-425 also support a







Vmux-405, Vmux-425GSM Abis Optimization Gateways

Vmux-405 Vmux-425

Height 1U 1U

Width 9.5-inch (24 cm) 19-inch (48 cm)

E1 ports 4 (service + uplink) 6 (service) +10 (uplink)

10/100BaseT ports 2 (uplink + 2 (uplink + management) management)

Front access P P

Additional features Power supply redundancy

Central Office

Remote Site

BSC

E1s

Large Remote Site

E1

E1

E1

E1

Vmux-405

E1

E1

Abis optimization

BTS

BTS

Vmux-425

BTS

BTS

BTS

BTS

MSC

E1s

ETHor E1

Vmux-425

ETHor E1

Voice compression technologies enable mobile

operators to slash backhaul bandwidth

requirements on BSC-to-MSC and MSC-to-PSTN

segments, as well as between MSCs. Because

voice traffic between the BTS and the BSC is

already compressed, no further compression is

recommended. However, significant bandwidth

reduction and cost savings can be realized by

optimizing the Abis interface, which carries the

encapsulated traffic in the BTS to BSC segment.

Up to 3:1 average bandwidth optimization

The Vmux-405 and Vmux-425 GSM Abis

optimization gateways are standalone devices,

complementing RAD’s Vmux voice compression

products. The Vmux-405 and Vmux-425 optimize

Abis bandwidth utilization, while greater efficiency

in the A interface (BSC to MSC) and the E interface

(MSC to MSC/PSTN) is achieved by the Vmux voice

trunking gateways (see pages 152-154). Together,

the Vmux gateways reduce OpEx and maximize the

amount of traffic that can be supported over links

with limited available bandwidth, thereby enabling

cellular operators to expand their network

infrastructure and introduce new services, without

incurring additional costs.

This is particularly important in remote or rural

areas lacking an extensive terrestrial telecom

infrastructure, where cellular operators backhaul

traffic over expensive satellite links. In addition,

the Vmux Abis optimization gateways can be used

over microwave radio connections. Moreover, due


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• Connects up to 60 E1 over E1, STM-1 and GbE uplinks

• Up to 3:1 average bandwidth optimization

• Point-to-point and point-to-multipoint applications

• Operates over terrestrial, satellite and microwave connections

• Small-sized, fully redundant system

• Full rate, enhanced full rate, half rate, and AMR support

• Compressed data, GPRS and dynamic EDGE support over multiple timeslots


• High precision clock recovery over packet

Voice compression technologies enable mobile

operators to slash backhaul bandwidth

requirements on BSC-to-MSC and MSC-to-PSTN

segments, as well as between MSCs. Because

voice traffic between the BTS and the BSC is

already compressed, no further compression is

recommended. However, significant bandwidth

reduction and cost savings can be realized by

optimizing the Abis interface, which carries the

encapsulated traffic in the BTS to BSC segment.

Up to 3:1 average bandwidth optimization

The Vmux-445 central-site GSM Abis

optimization gateway operates opposite the

Vmux-405 and Vmux-425 to complement RAD’s

Vmux voice compression products, enabling

cellular operators to lower backhaul costs across

their radio access network (RAN). The

Vmux-405, Vmux-425 and Vmux-445 optimize

the Abis bandwidth utilization, while greater

efficiency in the A interface (BSC to MSC) and

the E interface (MSC to MSC/PSTN) is achieved

by the Vmux voice trunking gateways (see pages

152-154). Together, the Vmux gateways reduce

OpEx while enabling cellular operators to expand

their network infrastructure and introduce new

services without additional costs.

Offering up to 3:1 bandwidth optimization,

the Vmux-445 is ideal for deployments in

remote or rural areas, where the lack of

extensive terrestrial infrastructure compels

cellular operators to backhaul traffic over

expensive satellite links.

Full redundancy

For carrier-class reliability, the Vmux-445 offers

full redundancy for the main module, including

the uplinks and the power supply modules, with

switchover in the event of malfunction.

Data, GPRS, dynamic EDGE supported

The Vmux-445 delivers optimized data, GPRS

and dynamic EDGE over multiple timeslots. It

supports all GSM codecs, including FR, EFR, HR,

and AMR. As a standard-based device, the

Vmux-445 is interoperable with equipment from

major switch vendors, such as Alcatel, Ericsson,

Siemens, Huawei, Nokia, and Motorola, thereby

facilitating connectivity in a multi-vendor

environment.

Clock regeneration over Ethernet uplinks

Advanced clock recovery capabilities, enable

accurate synchronization over packet transport,

allowing the use of packet switched networks to

backhaul cellular voice traffic.

The Vmux-445 is a compact 3U-high, 19-inch

wide unit that can be mounted in a 19-inch

rack. As a space-saving unit, the Vmux is an

ideal solution for BSC sites. The platform

grooms the traffic of up to 60 E1s over E1,

STM-1 or GbE uplinks, and supports redundant

AC/DC power supply.

SNMP management

The Vmux-445 features flexible management




out-of-band, using the network or user ports or

the dedicated management port. Advanced





based GUI.

The Vmux-445 also supports a variety of







Vmux-445Central-Site GSM Abis Optimization Gateway


Central Office

Remote Site

BSC Vmux-445

E1s

Large Remote Site

E1

E1

E1

E1

Vmux-405

E1

E1

Abis optimization

BTS

BTS

Vmux-425

BTS

BTS

BTS

BTS

MSC

E1s

ETHor E1

ETHor E1

Cellular Backhaul - connectdata.fr filesufficient to service 2G and some 3G traffic, ... bandwidth...

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