alfoplus80 · pdf fileb. alfoplus.1.03-11 siae microelettronica s.p.a. proprietary and...

ALFOplus Series – High Capacity IP Full Outdoor

Brochure

Document Number

B. ALFOplus.1.03-11

SIAE MICROELETTRONICA S.p.A. Proprietary and Confidential. All rights reserved. The copyright of this document is the property of SIAE MICROELETTRONICA

S.p.A. No part of this document may be copied, reprinted or reproduced in any material form, whether wholly or in part, without the written consent of SIAE

MICROELETTRONICA S.p.A. Further, the contents of this document or the methods or techniques contained therein must not be disclosed to any person.

Data subject to change without notice.

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ALFOplus80 Millimetric wave Radio

for Point-to-Point applications

Ultra High Capacity IP Full Outdoor

ALFOplus80 Series – Ultra High Capacity IP Full Outdoor

Document Number

B.ALFOplus80.2.02-12





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GENERAL INDEX

ABBREVIATIONS ........................................................................................................................................................... 5

PREAMBLE: “E-band”, a new frontier of capacity ....................................................................................................... 7

ULTRA HIGH CAPACITY IP FULL OUTODOOR SOLUTION – ALFOplus80 ...................................................................... 9

Main characteristics ................................................................................................................................................ 9

Available Configurations ........................................................................................................................................ 13

Adaptive Code Modulation (ACM) & Adaptive Symbol Rate (ASR)........................................................................... 14

Traffic classification ............................................................................................................................................... 15

Link Quality measurement .................................................................................................................................... 16

ATPC and ACM/ASR interaction ............................................................................................................................ 16

Throughput () ......................................................................................................................................................... 17

Ethernet features ...................................................................................................................................................... 19

Ethernet Interface characteristics ......................................................................................................................... 19

Enhanced Ethernet Characteristics ....................................................................................................................... 20

Ethernet Resiliency ................................................................................................................................................ 20

QoS management .................................................................................................................................................. 21

Layer2 priorities ..................................................................................................................................................... 22

IEEE 802.1Q VLANs ................................................................................................................................................ 23

Header compression ................................................................................................................................................. 24

Synchronization ......................................................................................................................................................... 26

Management System ................................................................................................................................................ 26

Supervision Interfaces ........................................................................................................................................... 26

Network Management System .............................................................................................................................. 26

Secured Connections to Network Element ........................................................................................................... 26

Mechanical Layout .................................................................................................................................................... 27

Integrated antenna solutions ................................................................................................................................ 27

Weight 1 ................................................................................................................................................................. 27

Physical Dimensions of system components ........................................................................................................ 27

Technical Characteristics ........................................................................................................................................... 29

Power supply ......................................................................................................................................................... 29

Power Consumption (W) ....................................................................................................................................... 29

Environmental conditions ..................................................................................................................................... 29


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Annex 1 – E-Band Maximum Link Length Estimation ................................................................................................ 30

Introduction ........................................................................................................................................................... 31

Preliminary – Technical Data used for the calculation: ......................................................................................... 33

ALFOplus80 – 1.000 MHz: Different Rain Intensities ........................................................................................... 34

ALFOplus80 HD – 500 MHz: Rain Intensity 22mm/h ............................................................................................. 35

ALFOplus80 HD – 250MHz: Rain Intensity 22mm/h .............................................................................................. 36



ALFOplus80 HD – 500 MHz: Rain Intensity 145mm/h ........................................................................................... 39

ALFOplus80 HD – 250 MHz: Rain Intensity 145mm/h ........................................................................................... 40

Conclusion ............................................................................................................................................................ 41

Annex 2 – Frequently requested standards compliances ......................................................................................... 42


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ABBREVIATIONS

ACM Adaptive Code Modulation

ASR Adaptive Symbol Rate

CRC Cyclic Redundancy Check

DCN Data Communication Network

DSCP Different Service Code Point

ETH Ethernet

EM Electro Magnetic

FEC Forward Error Corrector

IDU Indoor Unit

IP Internet Protocol

IPV4 – IPV6 Internet Protocol Version 4 and Version 6

LAG Link Aggregation

LAN Local Area network

LCT Local Craft Terminal

MAC Media Access Control

MDI Medium Dependent Interface

MDIX Medium Dependent Interface Crossover

MSE Mean Squared Error

NE Network Element

NMS Network Management System

NMS5UX/LX SIAE MICROELETTRONICA Network Management System

ODU Outdoor Unit


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PDV Packet Delay Variation

QAM Quadrature Amplitude Modulation

QoS Quality of Service

SCT Subnetwork Craft Terminal

SLA Service Level Agreement

SNMP Simple Network Protocol Management

SW Software

TMN Telecommunication Management Network

ToS Type of Service

VLAN Virtual Local Area Network

Naming note

In this document we will describe the ALFOplus80 equipment with its features and characteristics.

When we will refer to ALFOplus80 in its High Density configuration, “ALFOplus80HD” will be written, even if the

product name is still “ALFOplus80”.


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PREAMBLE: “E-band”, a new frontier of capacity

In the radio frequency spectrum, traditionally an

upper frontier for the medium/long range

communication is represented by the 60GHz

frequency (V-band); this frequency band

corresponds to the resonance frequency of the

atmospheric oxygen, which causes a huge peak in

the free space attenuation (more than 10dB/km!),

as shown in following graphics(source: University

of Firenze1).

Such propagation conditions, permitting some

singular applications based on really short range

communications (range up to 500mt. e.g. ideal for

Small Cells backhaul), practically avoid any useful

application in medium-long range

telecommunications based on EM microwave

propagation.

Most advanced radio and microelectronics

technology today permits going beyond this

frontier and using a new and really interesting

frequency band -from 70GHz up to 90GHz-

achieving ultra high capacities based on radio

links: this new frequency band is called “E-band”.

This “E-band” provides some big advantages in terms of radio propagation and telecommunications application:

First of all, the free space attenuation is in

the range between 3x10-1 dB/km up to

5x10-1 dB/km, which is really comparable

with highest “traditional” frequency bands

attenuation (42GHz: up to 2x10-1 dB/km)

1 http://radar.det.unifi.it/people/Fossi/sistlc9_2009-2010.pdf


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Second big advantage is that a frequency bandwidth of 10GHz is available for transmission – divided in

lower bandwidth from 71GHz up to 76GHz and upper bandwidth from 81GHz up to 86GHz- channelized

in steps of 250MHz channel bandwidth (250MHz, 500MHz, 750MHz, 1.000MHz), permitting huge

capacities even transmitting with low level modulation schemes (e.g. BPSK, 4QAM)

Last, but definely not least, the “E-band” is right now almost free; it represents a true solution for the

radio bandwidth outage which could represent an hard point to be solved in the Network evolution

toward the high capacity 3G/4G and LTE networks.


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ULTRA HIGH CAPACITY IP FULL OUTODOOR SOLUTION – ALFOplus80

ALFOplus80 is the 100% SIAE MICROELETTRONICA

solution for full outdoor ultra high capacity applications in

the “E-band” frequency spectrum.

The ALFOplus80 equipment provides toady scalable data

rates up to 2.5Gbps and even more if in-house designed

Packet Header Compressor is enabled, achieving up to

5.0Gbps in a single platform.

Modulation range, from 4QAM up to 64QAM, with hitless

Adaptive Code and Modulation and hitless Adaptive

Symbol Rate, not only makes ALFOplus80 the most

advanced E-band equipment in the market, but combine

highest throughput with “in field reliability”.

ALFOplus80 provides a full set of Ethernet features and advanced switching capabilities to meet all the Next

Generation Networks (4G/LTE) requirements in terms of high-capacity, synchronism transport, compactness and

zero footprint, and cost saving. It includes a full featured IP only radio engine.

Main characteristics

Following two ALFOplus80 versions are available:

Electrical Gigabit version

2x 10/100/1000baseT traffic ports (In Band management available) with clock and synchronism recovery

Optical gigabit version

1x 100/1000baseX / 2.5Gbps (STM-16) traffic port (In-band management available) with clock and

synchronism recovery

1x 10/100/1000baseT supervision port with clock and synchronism recovery


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Following two ALFOplus80HD versions are available:

Electrical Gigabit version

2x 10/100/1000baseT traffic ports (In Band management available) with clock and synchronism recovery


1x 10/100/1000baseT port for internal communication between ALFOplus80 HD in 1+1/2+0 configuration

Optical gigabit version

2x 100/1000baseX / 2.5Gbps (STM-16) traffic ports (In Band management available) with clock and

synchronism recovery


1x 10/100/1000baseT port for internal communication between ALFOplus80 HD in 1+1/2+0 configuration

Ethernet ports utilization

All ports –electrical and optical- can be used as traffic ports and, in this case, supervision and management can be

provided by using In-Band management.

In case that dedicated usage will be required, one of the Ethernet port(s) can be dedicated to supervision and

management or to the synchronism transport and the others can be dedicated to traffic transport.

All above mentioned ports support clock and synchronism recovery.


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Available Channel Bandwidth and Modulation

ALFOplus80 can provide following channel bandwidth:

250MHz

500MHz

750MHz

1000MHz

The availability of these channel bandwidths depends on the adopted configuration of the equipment1, thus as

follows:

Configuration Channel bandwidth and Configuration

250MHz 500MHz 750MHz 1000MHz

ALFOplus80 - -

ALFOplus80HD 2

2

Table 1 – channel bandwidth availability

In terms of modulation, following are available on the ALFOplus80, also in this case depending on adopted

configuration of ALFOplus80:

Configuration Modulation and Configuration

ALFOplus80 4QAM

ALFOplus80HD 4QAM, 16QAM, 64QAM3

Table 2 – modulation schemes availability

1 As per initial “Naming note”, to be noted that equipment we’re referring to is ALFOplus80, which can be also configured in its High Density configuration. In this case it will be called “ALFOplus80HD”, even being the same ALFOplus80 equipment.

2 750MHz and 1GHz channel bandwidths are available on ALFOplus80 since first version and in roadmap in second release of ALFOplus80HD

3 Modulations are available with two different FEC (Forward Error Correction Codes); for this reason, following steps of modulation are available: 4QAM HB, 4QAMst, 4QAM, 16QAM, 64QAM, where “st” stands for “strong”. For more details, please refer to following “Adaptive Code Modulation (ACM) & Adaptive Symbol Rate (ASR)” paragraph.


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Power Supply

ALFOplus80 power consumption is really performing (<25W) and compatible with POE standard.

By consequence, the power supply can be provided directly on the same CAT5 cable through which traffic is

incoming in the 10/100/1000baseT port of the equipment.

In case that POE is not provided by the connected equipment (e.g. third party router/switch, eNodeB, etc…) or in

case that external dedicated power supply is preferred, additional dedicated Power Supply Port can be used, with

standard power supply of -48V +15%.

Figure 1 - Detail on ALFOplus80 connectors: two Ethernet IP65 connectors and, in the middle, the dedicated power supply.


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Available Configurations

Following configurations are available for ALFOplus80 / ALFOplus80HD:

1+0

1+1 protected (with dedicated high speed connection between equipments)

2x(1+0), by using LAG

Nx(1+0), by using LAG


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Adaptive Code Modulation (ACM) & Adaptive Symbol Rate (ASR)

SIAE MICROELETTRONICA implements its top class MSE based Adaptive Code and Modulation also on

ALFOplus80HD, with the innovative Adaptive Symbol Rate functionality, always MSE based.

In particular 5 ACM profiles are provided with ALFOplus80HD, each one can be selected by SW in order to build a

user configured Adaptive Modulation Profile.

ALFOplus80HD provides modulation schemes up to 64QAM in order to maximize throughput and also provides

three different 4QAM profiles: 4QAM and 4QAM-strong with two different FEC codes implemented, and a third

one, the 4QAM HB by using Adaptive Symbol Rate, which not only uses a stronger FEC to fight fading and

interferences, but also reduce the symbol rate before losing availability: this additional profile achieve an even

strong maximization of link availability, with a 3dB higher system gain.

This unique set of profiles allows combining –at the same time– higher capacity in good propagation conditions

and really higher strength with tough conditions, for real “in field” applications.

Figure 2 – ALFOplus80 ACM profiles


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Traffic classification

The Adaptive Modulation entails a change in the available bandwidth in accord with the current modulation

scheme and, as a consequence, moving from higher modulation down to lower schemes, also the traffic capacity

is reduced. A fundamental feature is represented by the classification of the traffic, allowing deciding which class

of traffic is transported according to the available bandwidth. For example, if the modulation is reduced from

64QAM down to 16QAM -and down to 4QAM HB– all traffic exceeding the 16QAM capacity cannot be carried

anymore. With traffic classification it’s possible to select which Layer2 or Layer3 traffic has to be transmitted and

which can be “paused”, according to priority and type of traffic, in order to match different SLAs on the same

radio system.

Figure 3 – ALFOplus80 ACM profiles, Link Availability and Different classes of traffic

SIAE MICROELETTRONICA’s ALFOplus80HD solution has 8x switch queues –through which all possible priority

classes can be managed– with user configurable quality management.

SIAE MICROELETTRONICA’s implementation manages Ethernet traffic classification as follows:

Ethernet packets are processed according to 802.1p Layer2 tag included in the traffic itself;

Ethernet packets are processed according to the IPv4 TOS or IPv6 TC (Layer3)

Ethernet packets are processed according to the MPLS “Exp bits”.

Of course, a complete priority management and VLAN Management is available on the equipment (VLAN

Rewriting, VLAN Stacking/QinQ, Selective VLAN, Selective QinQ, etc...), in order to have the possibility to flexibly

change and/or manage priorities and classes of traffic according to the requirements of the specific and particular

application in which the equipment can be used.


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Link Quality measurement

In order to trigger an hitless modulation/bandwidth change, some switching criteria must be implemented.

Such criteria are not based only on the received power level, but on the quality of the received signal: SIAE

MICROELETTRONICA’s solutions are based on MSE (Mean Squared Error) measurements allowing the system to

react to any source of degradation –including in-band interference and selective fading!- well before errors are

detected by the FEC.

This switching process is realized in an independent way for the two directions (uplink and downlink) in order to

maximize the traffic transportation, always keeping the highest quality. And it is completely hitless, jitter free and

error free for surviving traffic; it means that, when a modulation/bandwidth change occurs, it is totally invisible

for the higher classes of traffic carried through the link.

ATPC and ACM/ASR interaction

The Automatic Transmission Power Control (ATPC) regulates the RF output power of the local transmitter

depending on the value of the RF level at the remote terminal. This value has to be preset from the local terminal

as threshold high and low. The difference between the two thresholds must be equal or higher than 3 dB.

As soon as the received level crosses the preset threshold level low due to the increase of the hop attenuation, a

microprocessor (µP), embedded in the ALFOplus80HD, at the receiver side of the remote terminal sends back to

the local terminal a control to increase the transmitted power.

A good set of the thresholds is to put the ATPC Low Level threshold higher (or even slightly higher) than the

threshold of the highest modulation scheme of the ACM; this way, the ATPC start to work before than the

received signal is reduced and by consequence will force the system to downgrade the modulation. The behavior

of the system is to always try to increase the PTX and so the System Gain, before than being forced to reduce

capacity a modulation.

Resuming, the correct setting of the thresholds is when the two windows, the ATPC one and the ACM one, are

not overlapped, as per following figure.


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Figure 4 – ALFOplus80HD: ATPC and ACM interaction, according to hop attenuation

Throughput (1)

An Adaptive Modulation radio link throughput always depends on current modulation and on configuration and

capacity; in the following table different throughput values will be specified for each configuration.

Below the maximum net radio throughput with the different configurations and channel-bandwidth

combinations:

ALFOplus80

750MHz 1 GHz

4 QAM 1.0 Gbps

Table 3 – Radio throughput in ALFOplus80 configuration

1 Throughput is defined according to paragraph 26.1 of RFC2544.


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ALFOplus80HD

250MHz 500MHz

4 QAM-HB 125 Mbps 252 Mbps

4 QAM-ST 250 Mbps 503 Mbps

4 QAM 336 Mbps 678 Mbps

16 QAM 656 Mbps 1.318 Mbps

64QAM 1.020 Mbps 2.046Mbps

Table 4 – Radio throughput in ALFOplus80HD configuration

To be noted that the carried throughput can achieve really higher capacities, thanks to the Packet Header

Compression technology, compressing in an efficient way all following protocol structure:

C-Tag, Multiple s-Tags , MACinMAC , multiple MPLS Labels, IPv6, UDP, RTP.

For a complete description of the Packet Header Compressor, please refer to Header Compression chapter.


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Ethernet features

SIAE MICROELETTRONICA ALFOplus80 maps Ethernet straight into the radio frames (Native IP), this approach

provides a point-to-point unacknowledged connectionless service over the radio channel. A CRC is added to

prevent wrong packets being forwarded.

In case of 2.5Gbps usage, to be noted that the Ethernet can also be natively transported in a proprietary frame

flow, directly built at base-band stage (e.g. in the AGS-H) and directly modulated in RF frequency.

Ethernet Interface characteristics

The ALFOplus80 implements a multi-port store-and-forward Layer2 Switch. The embedded Switch supports the

following Layer2 functionalities:

MAC switching

MAC Address learning and ageing

Auto negotiation

MDI/MDIX crossover

Automatic MDI/MDIX crossover is supported; it allows NIC-to-SWITCH and SWITCH-to-SWITCH

connection regardless of cable type (straight-through or crossover).

Layer 2 Flow Control / Back Pressure

SIAE MICROELETTRONICA implements flow control based on IEEE 802.3x (full-duplex operation) and Back

Pressure (half-duplex operation) to prevent packet loss during traffic peak.

IEEE 802.1q VLANs and VLAN stacking (Q in Q)

Quality of Service

ITU-T Y.1731 ETH OAM / IEEE 802.1ag


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Enhanced Ethernet Characteristics

EVPN profiling

o Bandwidth limiting per VLAN

o Bandwidth limiting per priority.

o Frame fragmentation

o VLAN rewriting

Hard limiting or WRED algorithms (software selectable)

Enhanced Ethernet prioritization based on MPLS “Exp bits”

Selective QinQ based on VLAN and 802.1p priority

VLAN rewriting (Radio side)

8 queues Ethernet scheduler towards radio interface

Layer2 and Layer1 link aggregation

M-STP (Multiple Spanning Tree Protocol) support up to 4 instances

Ciphering (AES)

Selective RMON on VLAN basis

G.8264 (“Distribution of timing information through packet networks ”) support

Ethernet Resiliency

LLF - Link Loss Forwarding – In order to propagate the information that a local traffic connection is discarded or

faulted to the remote equipment in order to let it be aware of this (similar to AIS alarm available for E1

TDM interface)

PIRL - Peak Input Rate Limiting - In order to control the traffic flows incoming the equipment and thus the

network, this access limitation /control policies is introduced with a “leaky bucket architecture”

G.8032 ERP – Ethernet Ring Protection – In order to provide fast protection switching (<50ms) by integrating

mature Ethernet operations, administration, and maintenance (OAM) functions and a simple automatic

protection switching (APS) protocol for Ethernet ring networks. In addition, since Ethernet, and thus ERP, is


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virtually agnostic to all physical/server layer technologies, it can be supported any carrier’s network

infrastructure. Optimized for ring topologies, it can be applied in any Network topology, and in it also

providing multiple E-Services (e.g., E-LINE, E-TREE, E-LAN)

ELP - Ethernet Link Protection - ELP is used to protect the network from Ethernet link failures in various network

topologies and application

LAG - Link Aggregation – is a recommendation (802.1ax-2008 or 802.3ad) designed for using multiple media in

parallel to increase the link speed beyond the limits of any one single medium and increase the redundancy

for higher availability

QoS management

QoS refers to the ability of a network device to provide improved services to selected network traffic over various

underlying technologies, including Ethernet and wireless LANs. In particular, QoS feature provides an improved

and more predictable network services, as follows:

Improving loss characteristics

Avoiding and managing network congestion

Prioritizing services to different kinds of network traffic

Optimization for packet delay variation (PDV)

Setting traffic priorities and end-to-end quality management

QoS is implemented in SIAE MICROELETTRONICA products in a multilevel approach:

VLAN per port

Layer2 VLAN identifiers (802.1Q)

Layer2 priority bits (802.1P QoS)

Layer3 priorities IPv4 (ToS or DSCP) or IPv6 (TC)

Frame prioritization based on MPLS “EXP bits”


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Layer2 priorities

Priority queues are introduced on switches output ports. 802.1p describes 8 priority levels, mapped onto 8

output queues.

A typical mapping scheme is shown below.

802.1p priority levels Traffic type Used queue

0 Best Effort 0

1 Background 1

2 NOT DEFINED 2

3 Excellent Effort 3

4 Controlled Load 4

5 Video ( latency 100 msec ) 5

6 Voice ( latency 10 msec ) 6

7 Network Control 7

Synchronism Transport 1588v2 8

1588v2 dedicated queue Table 5 – 802.1p priorities and queues distribution

Two scheduling algorithms are available in SIAE MICROELETTRONICA equipment: strict priority or weighted

scheduling WFQ (SW selectable).

Strict Priority means that Higher priority queues are emptied first

Weighted scheduling (WFQ) means that queues are served proportionally to their configurable weights

(from 1 to 100)

Mixed Strict Priority and WFQ

To be noted that 1588v2 transport always is set as Strict High Priority transport through the 9th dedicated queue,

achieving a “Zero PDV”1 transport not only in case of fixed modulation, but also in case of ACM+ASR feature

enabled.

1 The Zero PDV (Packet Delay Variation) behavior has been tested not only with modeled traffic, but also with real traffic

transport and is guaranteed with a chain of 3x links with the performances required by 1588v2 for a single link, i.e. ALFOplus80 comply with 1588v2 with a more than conservative performances.


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IEEE 802.1Q VLANs

Virtual LAN (VLAN) support is the ability to logically break a LAN into a few smaller LANs and prevent data from

flowing between the sub-LANs.

VLANs can be activated in three different ways:

Based on Port. A packet belongs to a particular VLAN, depending on the local port ID. This means that

each packet received on a specific port will be forwarded only to the ports belonging to the same VLAN.

Based on IEEE 802.1Q TAG. A packet belongs to a particular VLAN, depending on its VLAN ID, defined by

the VID (VLAN Identifier) TAG content.

Hybrid. It is a mix of previous ones. Locally configured tagged frames are managed according IEEE 802.1Q

TAG, all others follow port rules.

SIAE MICROELETTRONICA equipment can also be configured to add a VLAN tag (VD and user priority) to untagged

traffic.

SIAE MICROELETTRONICA products support VLAN stacking (QinQ). This means that if input traffic is 802.1Q

compliant – i.e. VLANs are implemented – it is possible to create other VLAN inserting 4 additional bytes in

Ethernet header for traffic switching and QoS purposes.

VLAN stacking (also named QinQ) is a feature that allows an Ethernet frame to include more than one IEEE

802.1Q TAG. The scope of VLAN staking is to differentiate the traffic at different levels when the packets must

cross networks managed by different entities.

SIAE MICROELETTRONICA radio systems supports the VLAN stacking. Once a packet comes into the radio, it is

possible to add a new IEEE 802.1Q TAG with an ID depending from the port, from VLAN or type of service. Of

course, at egress side it is possible to remove such additional VLAN tag, making transport totally transparent.


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Header compression

SIAE MICROELETTRONICA has developed a two level header compressor that is able to hash L2, L2.5, L3 and L4

header’s protocols and thus massively increase the available radio throughput.

The packet compression gain provided is from 3% up to 200%, depending on payload, protocols stacks and packet

size.

In the following figure, supported Header Compression protocol and various compression rates are reported, in

relation with packet sizes compressed protocol stacks.

Figure 5 - Layers involved in the Header compression process

The embedded compression technology can be configured in two working modes, as follows:

Basic configuration:

Packet compression supporting header combinations up to 68 bytes (Eth + MPLS + IP/UDP + RTP/GTP)

Deep/IP tunneling configuration:

Packet compression supporting header combinations up to 128 bytes (Ethernet + MPLS + IP/UDP +

RTP/GTP with additional IPv4/IPv6 tunneling)

Of course, the compression gain depends on following two fundamental factors:

Frame size

Protocol structure

As shown in following graphics, the compression gain can be higher especially with small size frames and with the

most complete protocol stack (“the more protocols, the more compression”)


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Compression Gain

Figure 6 - Relation between packets size and compression ratio


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Synchronization

Synchronization unit supports following functionalities:

Synchronism source selection

Quality estimation based on frequency

Quality estimation based on information as per G.8264 standard.

Synchronism can be sourced from the incoming Ethernet flows (Synchronous Ethernet) and transported toward

remote terminal by using the symbol rate.

Remote terminal can be therefore synchronized with the received symbol rate and synchronism is distributed to

all egress Ethernet ports.

Management System

Supervision Interfaces ALFOplus80 can be reached from network management system perspective either by establishing a DCN data

channel over the Ethernet traffic interface (InBand management) or by provisioning a dedicated Ethernet port for

management purpose (Out of band management)

InBand management uses a logical separation between payload traffic and DCN traffic using specific VLAN tag

dedicated to supervision traffic.

Network Management System As for any SIAE MICROELETTRONICA network element, ALFOplus80 is provided with an embedded SNMP agent

fully compatible with existing SIAE’s Network Management Systems (NMS5-LX/UX) and relevant management

tools.

Secured Connections to Network Element Secure protocols are supported to connect the NE:

Security management (SSH, SFTP) on equipment

Secure HTTP access (HTTPS) on equipment

SNMP V3


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Mechanical Layout

Integrated antenna solutions The ALFOplus80 is provided as integrated antenna solution, as well as in 80GHz frequency band is not even

possible a separated antenna installation.

Applicable antenna diameters are 0.2mt, 0.3mt and 0.6mt. Bigger antennas are not in field applicable for pointing

and alignment in field constraints.

Figure 7 – ALFOplus80 with integrated 0.3mt antenna.

Weight 1

System Version Weight(kg)

ALFOplus80 / ALFOplus80HD 4.5

Physical Dimensions of system components 1

System Version Width (mm) Height (mm) Depth (mm)

ALFOplus80 ALFOplus80HD

270 270 67,6

For a more complete dimensions description, please refer to here below figure.

1 Data subject to change.


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Figure 8 – ALFOplus80 physical dimensions


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Technical Characteristics

Power supply

Range

-40.8 -57.6 VDC According to ETSI EN300132-2

Power Consumption (W)

Configuration ALFOplus80

ALFOplus80 radio terminal ≤ 25

Environmental conditions

Environmental Conditions Range

Protection Class for ODU IP65

Wind load 200 km/h

Surge and lightning protection according to ETSI EN 301 489

Temperature range -33°C ÷ +55°C


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Annex 1 – E-Band

Maximum Link

Length Estimation


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Introduction

An important aspect regarding “E-band” equipments, and so ALFOplus80, is the link length which can be achieved

in the 80GHz frequencies, considering applicable link availabilities and “reasonable” antenna dimensions –

meaning usable in field, in real application cases.

In fact, to be taken into account is that no antennas bigger than 0.6mt diameter are used, just because of the too

much thin RPE main beam. With this kind of beam, a fixed pointing of the antennas is possible only up 0.6mt;

beyond the pointing is really hard to be achieved and –much more important- cannot be maintained during the

time of the “in field application”.

The purpose of this annex is to provide an estimation of the maximum distances that can be achieved with radio

equipments transmitting in the “E-band” with ALFOplus80.

These calculations have been performed considering:

Vertical Polarization;

A tolerance of 1 dB has been taken into account;

Maximum Transmit Power Attenuation (ATPC range): 20dB

The performances for each link have been performed considering each link lacking of interference.

The performances for each link have been performed considering clear LOS between the terminal sites.

The links performances degradations due to ducting and other anomalous propagation phenomenon has

not been taken into account.

The following calculations must be considered as a preliminary analysis. Real maximum link distance

calculation could differ from the data present below

The calculations have been performed with the following variables combinations:

Rain Intensity of: 22mm/h – 35mm/h – 42mm/h – 60mm/h – 95mm/h – 145mm/h

Channel BW: 250 MHz – 500 MHz and 1 GHz

Modulation: 4 QAM Half-Band – 4 QAM Strong – 4 QAM – 16 QAM Strong - 16 QAM – 64 QAM

Antennas: It has been supposed the availability of 0.2m – 0.3m – 0.6m models

Availability Objectives: 99.999% - 99.995% - 99.99%


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The calculations have been performed considering the two different configurations of the ALFOplus80:

SIAE ALFOplus80 HD: for channel bandwidth of 250 MHz and 500MHz (Modulations: All above)

SIAE ALFOplus80: for channel bandwidth of 1 GHz (Modulation: 4QAM, Tx power: 18 dBm)

Note: Considering the official ETSI mask, the ALFOplus80’s TX power has been tested and verified up to

22dBm, complying with all relevant ETSI recommendations (EN 302 217-3)

The 18dBm value only refers to a more conservative draft ETSI mask (EN 302 217-2.2), which today is

in a discussion stage.

Finally, the calculations have been performed considering following two different ATPC modes

ATPC Disabled: when required, the link is working with fixed transmit power attenuation in order to not

exceed the maximum input RX level. The output power remains fixed, independently from the

propagation conditions.

ATPC Enabled: In nominal conditions (without rain fading) the link can work with a reduced output power,

in order to not exceed the maximum input RX level. In case of rain fading, the output power can be

dynamically increased up to the maximum value in order to increase the link performances.

A complete case set of all the possible combination can be provide in a separate document; in this annex only the

most significant cases are reported, in order to present the applicability range of such technology and frequency.


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Preliminary – Technical Data used for the calculation:

Antennas [m] Gain [dBi]

0.2 40.0

0.3 43.0

0.6 50.0

Equipment Channel BW

[MHz] Modulation

TX Power

[dBm]

Thresold Power

[dBm]

Net Radio

Throughput

ALFOplus80 750 4QAM 15 -63 1.000Mbps

1000 4QAM 18 -63 1.000Mbps

ALFOplus80HD

250

4QAM-HB 18 -73 125 Mbps

4sQAM 18 -70 250 Mbps

4QAM 18 -67 336 Mbps

16QAM 15 -59 656 Mbps

64QAM 13 -54 1.020 Mbps

500

4QAM-HB 18 -70 252 Mbps

4sQAM 18 -67 503 Mbps

4QAM 18 -64 678 Mbps

16QAM 15 -56 1.318 Mbps

64QAM 13 -51 2.046 Mbps

NOTE: Equipment parameters could be subject to future refinement. Antenna diameter availability and gain

figures to be confirmed by antenna suppliers.


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ALFOplus80 – 1.000 MHz: Different Rain Intensities

Table 6: ALFOplus80 - BW = 1000MHz – Rain= 22 to 42 mm/h – ATPC Enabled

Table 7: ALFOplus80 - BW = 1000MHz – Rain= 22 to 42 mm/h – ATPC Disabled


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ALFOplus80 HD – 500 MHz: Rain Intensity 22mm/h

Table 8: ALFOplus80Plus - BW = 500MHz – MOD = 4QAM-hb to 4QAM - ATPC Enabled

Table 9: ALFOplus80Plus - BW = 500MHz – MOD = 16QAM-st to 64QAM - ATPC Enabled

Table 10: ALFOplus80Plus - BW = 500MHz – MOD = 4QAM-HB to 4QAM - ATPC Disabled

Table 11: ALFOplus80Plus - BW = 500MHz – MOD = 16QAM-st to 64QAM - ATPC Disabled


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ALFOplus80 HD – 250MHz: Rain Intensity 22mm/h

Table 12: ALFOplus80Plus - BW = 250MHz – MOD = 4QAM-hb to 4QAM – ATPC Enabled

Table 13: ALFOplus80Plus - BW = 250MHz – MOD = 16QAM-st to 64QAM - ATPC Enabled

Table 14: ALFOplus80Plus - BW = 250MHz – MOD = 4QAM-hb to 4QAM - ATPC Disabled



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Table 17: ALFOplus80Plus - BW = 250MHz – MOD = 16QAM-st to 64QAM – ATPC Enabled




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Table 28: ALFOplus80Plus - BW = 250MHz – MOD = 4QAM-hb to 4QAM - ATPC Enabled





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Conclusion

The maximum distance varies from about 5.5 km in the best scenario (22mm/h – 4QAM-HB – 0.6m diameter -

99.99 % of availability) to about 0.3 km for worst cases (145 mm/h -64QAM – 0.2 m diameter – 99.999% of

availability).

The use of ATPC can help, for the most critical cases (i.e. high rain intensity and/or performances), to increase the

links’ lengths, since it allow the link to suffer from deeper field attenuations.

In most cases, however, the same maximum link length can be achieved with both fixed attenuation and ATPC.

ALFOplus Series – High Capacity IP Full Outdoor

Brochure

Document Number

B. ALFOplus.1.03-11





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Annex 2 – Frequently requested standards compliances

EN 300 132-2 Power supply interface at the input to telecommunications equipment

EN 300 019 Environmental conditions and environmental tests for telecommunications equipment

(Operation: class 3.2 for IDU and class 4.1 for ODU; storage: class 1.2; transport: class

2.3)

EN 301 390 Fixed Radio Systems; Point-to-point and Point-to-Multipoint Systems; Spurious

emissions and receiver immunity at equipment/antenna port of Digital Fixed Radio

System

EN 302 217-3

EN 302 217-2.2 Characteristics and requirements for point-to-point equipment and antenna

EN 301 489 Electromagnetic Compatibility (EMC) standard for radio equipment and services

EN 60950 Information Technology Equipment – Safety

ITU-R ITU Recommendations for all frequency bands

ITU-R F.1191 Bandwidths and unwanted emissions of digital fixed service systems

CEPT CEPT Recommendations for all frequency bands

IEE 802 802.1ag (Connectivity Fault Management), 802.1p (QoS), 802.1Q (VLAN), 802.1W

(RSTP), 802.3ad-2008 (link aggregation), 802.3i (10BASE-T), 802.3u (100BASE-TX/FX),

802.3x (Flow control), 802.3ab (1000 BASE-T), 802.3z (1000BASE LX/SX)

IEEE 1588-2008 Standard for a Precision Clock Synchronization Protocol for Networked Measurement

and Control Systems

ITU-T 1731 Ethernet OAM fault management

ITU-T G.8261 Timing and Synchronization Aspects in Packet Networks

ITU-T G.8262 Characteristics of synchronous Ethernet Equipment slave Clock

ITU-T G.8264 Distribution of timing through packet networks

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