breezemax tdd functional description 070727

Proprietary and Confidential information of Alvarion Ltd.

Revision: 1.0

August 2007

Functional Description

BreezeMAX™ TDD

Alvarion Ltd. All rights reserved.

The material contained here in is proprietary, privileged, and confidential. No disclosure thereof shall be made to third parties without the express permission of Alvarion Ltd. Alvarion Ltd. Reserves the right to alter the equipment specifications and descriptions in this publication with prior notice. No part of this publication shall be deemed to be part of any contract or warranty unless specifically incorporated by reference into such contract

of 51 Proprietary and Confidential information of Alvarion Ltd.

Table of Contents 1 Introduction ............................................................................................................. 3

1.1 About Alvarion................................................................................................. 3

1.2 BreezeMAX..................................................................................................... 3

2 System Components .............................................................................................. 6

2.1 General ........................................................................................................... 6

2.2 Customer Premise Equipment ....................................................................... 7

2.3 Base Station Equipment ............................................................................... 12

2.4 Networking Equipment ................................................................................. 17

2.5 Management Systems.................................................................................. 18

3 BreezeMAX Specification ..................................................................................... 21

3.1 Base Station and Micro Base Station Specifications ................................... 21

3.2 PRO-S CPE Specifications........................................................................... 30

3.3 Si CPE Specifications ................................................................................... 34

4 Benefits ................................................................................................................. 38

5 Features and Applications .................................................................................... 40

5.1 Base Station Architecture and Diversity Configurations .............................. 40

5.2 OFDMA in the Uplink.................................................................................... 43

5.3 Automatic Transmit Power Control............................................................... 44

5.4 Adaptive Modulation and Coding Scheme................................................... 44

5.5 Spectrum Scanning and Best BST/AU Selection ........................................ 45

5.6 Indoor CPE with Multiple Antennas with Fast Switching ............................. 45

5.7 Multiple Business Models for CPE Distribution............................................ 46

5.8 Automatic Authentication and Service Provisioning..................................... 46

5.9 Applications................................................................................................... 47

5.10 Services ........................................................................................................ 47

5.11 Privacy and Network Segmentation ............................................................. 49

5.12 High Availability............................................................................................. 51


1 Introduction

1.1 About Alvarion

With more than 3 million units deployed in 150 countries, Alvarion is the world’s leading provider of innovative wireless broadband network solutions enabling Personal Broadband to improve lifestyles and productivity with portable and mobile data, VoIP, video and other services.

Alvarion is leading the market to Open WiMAX solutions with the most extensive deployments and proven product portfolio in the industry covering the full range of frequency bands with both fixed and mobile solutions. Alvarion’s products enable the delivery of personal mobile broadband, business and residential broadband access, corporate VPNs, toll quality telephony, mobile base station feeding, hotspot coverage extension, community interconnection, public safety communications, and mobile voice and data.

As a wireless broadband pioneer, Alvarion has been driving and delivering innovations for over 10 years from core technology developments to creating and promoting industry standards. Leveraging its key roles in the IEEE and HiperMAN standards committees and experience in deploying OFDM-based systems, the Company's prominent work in the WiMAX Forum is focused on increasing the widespread adoption of standards-based products in the wireless broadband market and leading the entire industry to Open WiMAX solutions.

1.2 BreezeMAX

BreezeMAX TDD (BreezeMAX) is Alvarion's IEEE 802.16e Pre-Certified WiMAX platform operating in Time Division Duplex (TDD) mode. BreezeMAX TDD has an evolution path to support the 802.16e standard, with support for full mobility services. It leverages Alvarion's market-leading knowledge of Broadband Wireless Access (BWA), industry leadership, proven field experience, and core technologies including many years of experience with OFDM technology. Built from the ground up based on the IEEE 802.16 standards, BreezeMAX is designed specifically to meet the unique requirements of the wireless Metropolitan Area Network (MAN) environment and to deliver broadband access services to a wide range of customers, including residential, SOHO, SME and multi-tenant customers. Its Media Access Control (MAC) protocol was designed for point-to-multipoint broadband wireless access applications, providing a very efficient use of the wireless spectrum and supporting difficult user environments. The access and bandwidth allocation mechanisms accommodate hundreds of subscriber units per channel, with subscriber units that may support different services to multiple end users.


The system uses OFDM radio technology, which is robust in adverse channel conditions and enables operation in non line of sight links. This allows easy installation and improves coverage, while maintaining a high level of spectral efficiency. In the uplink the system uses OFDMA-16, supporting N x Subscriber Units per Symbol (N=1 to 16). Modulation and coding can be adapted per burst, ever striving to achieve a balance between robustness and efficiency in accordance with prevailing link conditions. BreezeMAX supports a wide range of network services, including Internet access (via IP or PPPoE tunneling), VPNs, Voice over IP and Video Surveillance. Service recognition and multiple classifiers that can be used for generating various service profiles enable operators to offer differentiated SLAs with committed QoS for each service profile. BreezeMAX offers an innovative solution for a Self-Install CPE, including all the features, embedded capabilities and supplementary tools that support easy installation by a non-professional user and fully automated network-entry, authentication and services provisioning. The elements that enable and support the Self-Install solution include:

4-channels Access Unit and high-power radios at the Base Station

Second or fourth order transmit diversity at the Base Station using Multiple-Input-Multiple-Output (MIMO) Matrix A radio technology.

Second or fourth order receive diversity at the Base Station using Maximum Receive Ratio Combining (MRRC).

Uplink sub-channels using OFDMA-16 for increased service efficiency and improved link budget.

A high-power all-indoor CPE with an integral antenna array, providing 360 degrees coverage with smart selection of Tx and Rx antennas. An optional wall/window mounted antenna to extend the coverage area.

Automatic frequency scanning and best Access Unit/Base Station selection algorithms in the CPE.

Enhanced Automatic Transmit Power Control (ATPC) and dynamic rate selection (multirate) optimized for multiple sub-channels in the uplink.

Centralized CPE authentication and service provisioning using either a commercial RADIUS server or an entry level BreezeMAX Service Manager server available from Alvarion.

A suite of features and support tools to enable fast and simple installation according to various business models.

The system operates in Time Division Duplex (TDD) and is currently available in the 2.3 GHz (WCS), 2.5 GHz (MMDS and MCS), 3.3 GHz and 3.5 GHz frequency bands. The actual operating frequencies used by the system can be configured according to applicable radio regulations, license conditions and specific deployment considerations.


This document outlines BreezeMAX system elements and specifications and highlights its functionality.


2 System Components

2.1 General

A BreezeMAX system comprises the following system elements:

Base Station (BST) Equipment: BreezeMAX Base Station equipment, including the modular Base Station, Micro Base Station, GPS Receiver and other components.

Customer Premise Equipment (CPE): BreezeMAX Subscriber Units and supplementary equipment, including Alvarion's Voice/Networking Gateways and the BreezeMAX WI2 integrated outdoor solution for WiFi services. Alvarion’s portfolio of Voice Gateways includes a wide range of VoIP solutions using either proprietary or standard protocols for effective management of VoIP sessions. The Voice and Networking Gateways are available in various forms, including add-on external gateways, gateways that serve as indoor units including battery backup for the outdoor CPEs, or docking unit including battery backup for the Self-Install indoor CPE.

Networking Equipment: Standard switches/routers and other networking equipment, supporting connections to the backbone and/or Internet. Additional equipment may provide support for specific applications such as V5.2 to SIP Access Gateway or Policy and Application Functions for effective management of VoIP traffic using SIP.

Management Systems: SNMP-based Management, AAA server(s) and other Operation Support Systems.

IF Coax

IF Coax

NMS

Public DataNetwork

1Gbps Ethernet

BRAS

ODU-2Radio Cluster 1

F3

ODU-1Radio Cluster1

F3

100B-TEthernet

BST IDU cage

SW

VoIPGW

V5.2 Bundled

E1s

V5.2Switch

PSTN

ODU-3Radio Cluster1

F3ODU-4

Radio Cluster 1F3

ANT1

ANT2

10λ

IF Coax

IF Coax

Radius Server

IF Coax

IF Coax

NMS

Public DataNetwork

1Gbps Ethernet

BRAS

ODU-2Radio Cluster 1

F3

ODU-1Radio Cluster1

F3

100B-TEthernet

BST IDU cage

SW

VoIPGW

V5.2 Bundled

E1s

V5.2Switch

PSTN

ODU-3Radio Cluster1

F3ODU-4

Radio Cluster 1F3

ANT1

ANT2

10λ

IF Coax

IF Coax

Radius Server


2.2 Customer Premise Equipment

Alvarion’s portfolio of CPEs includes the BreezeMAX Subscriber Units and add-on Voice Gateways. Alvarion offers also the BreezeMAX Wi2, a converged solution that unites the advantages of the popular WiFi local access with the powerful capabilities of BreezeMAX systems to provide cost-effective solutions for personal broadband services. BreezeMAX Subscriber Units are powered by Intel's WiMAX Connection 2250 dual-mode chip, providing full future compliance with next generation IEEE 802.16e mobile WiMAX systems. BreezeMAX Subscriber Units provide an efficient platform for a wide range of services, offering operators ultimate flexibility in serving a variety of business and residential customers cost effectively. BreezeMAX Subscriber Units support dual operation modes, enabling detection of the protocol used in the wireless link (Automatic protocol detection-APD) and automatic switching between FDD and TDD operation modes according to the operation mode of the Base Station (not applicable to Subscriber Units in bands where only a single operation mode is supported, such as the 2.3 and 2.5 GHz bands). Alvarion offers several types of Subscriber Units to support various deployment options and a wide range of services:

Outdoor Subscriber Units with various types of Indoor Units to support a wide range of data and voice services.

Indoor Self-Install Subscriber Units, including an optional Voice Gateway docking unit (SRU) with battery backup.

2.2.1 Outdoor Subscriber Units

The BreezeMAX PRO-S Subscriber Unit is comprised of an Outdoor Unit (ODU) and an Indoor Unit (IDU). The ODU contains all the active components (modem, radio, management and data processing) of the Subscriber Unit, with either an integral high-gain flat antenna (SA models) or a connection to a detached antenna (SE models). The IDU is powered from the mains and connects to the ODU via a Category 5E Ethernet cable carrying the Ethernet data between the two units, as well as power (-54 VDC) and control signals to the ODU and status indications from the ODU. Configuration and performance monitoring of the unit can be performed using any of the following options:


Remotely by the Base Station, where the Base Station is managed using either the Monitor program or SNMP.

Locally via the Ethernet port, using Telnet to access the Installer Monitor program.

Using a PC/Notebook or a PDA/Pocket PC with an http browser to access the built-in web configuration server.

To facilitate the configuration process, antenna alignment and performance monitoring during installation/testing, a Notebook or a PDA can be connected directly to the ODU for fast and easy completion of all the necessary operations. A miniature SU Alignment Unit (SAU), that includes signal strength and status indicators, is also available to support easy and convenient antenna alignment and status verification. The IDU is available in multiple configurations of network interfaces that optimally serve a wide variety of market segments and applications. IDU types includes:

Data Connection IDU

Networking Gateway IDU

Voice Gateway IDU

2.2.1.1 Data Connection IDU The Data Connection IDU (Universal IDU) is the basic IDU, functioning as a simple power supply and interface unit that connects the user's equipment to the ODU.

2.2.1.2 Networking Gateway IDU The BreezeMAX Networking Gateway IDU is the ideal integrated networking solution for both home and small business users. It features an advanced integrated broadband router with comprehensive IP sharing and security capabilities, with four port 10/100 Base-T switch and WiFi (IEEE 802.11b/g) Wireless Access Point. The powerful networking solution enables comprehensive high-speed connection sharing for multiple users, and brings the freedom of high-speed, wireless broadband connectivity to home and SOHO networks with integrated IEEE 802.11b/g Wireless LAN functionality. With features such as Static & Dynamic routing, NAT functionality, built-in firewall and an indoor coverage range of 35-100 meters, the Networking Gateway IDU presents operators with a compelling carrier-class home networking solution.

2.2.1.3 Voice Gateway IDU The Voice Gateway IDU provides integrated voice and data services for residential and SOHO users. The Voice Gateway IDUs include backup battery to ensure uninterrupted services during power outages of up to two hours, and are available in two models:


With one 10/100 Base-T data port and one RJ-11 or Terminal Board POTS ports.

With one 10/100 Base-T data port and two RJ-11 or Terminal Board POTS ports. Featuring advanced voice and data functions such as SIP protocols support, VLAN tagging, traffic prioritization by 802.1p and IP DiffServ, Class 5 voice services (3-Party conference, call waiting, call hold), integrated management and more, the Voice Gateway IDU presents an ideal single box solution for operators seeking to serve combined broadband voice and data services.

2.2.2 Self-Install Indoor Subscriber Unit

The Self Install Si CPE is a compact Subscriber Unit that is intended for indoor installations. The Si CPE includes embedded capabilities and supplementary tools that support easy installation by a non-professional user, supporting fully automated network-entry, authentication and services provisioning. The Base Station equipment and the Si CPE also include advanced capabilities that significantly increase the link budget in both directions to ensure optimal performance in indoors installations, providing a highly effective solution for self-installation by end-users. The Si CPE includes 6 internal antennas providing full 360° coverage, and a connection to an optional wall/window detached antenna. The Si CPE connects to the end-user equipment through either a 10/100 Base-T Ethernet interface (E model) or a USB interface (U model). Configuration and performance monitoring of the unit can be performed using any of the following options:

Remotely by the Base Station, where the Base Station is managed using either the Monitor program or SNMP.

Locally via the Ethernet port, using Telnet to access the Installer Monitor program.

Using a PC/Notebook or a PDA/Pocket PC with an http browser to access the built-in web configuration server.

Several tools that support easy installation by non-professional users are available to support various business models. These include:

A user-friendly WiMAX Modem Application designed for the non-professional end user provides easy to follow installation instructions. The application includes pre-configuration of most of the relevant parameters, which are automatically loaded into the unit. It guides the user to enter the required credentials (User Name and Password) and optionally select the proper location. The application also includes simple but efficient performance monitoring tools to support easy identification of possible problems.


An optional Smart Card, that may be supplied either together with the unit or separately, can include all relevant configuration details, including location and end user specific parameters.

The unit may also be pre-configured prior to shipment to the end user, including all location and end user specific parameters.

2.2.3 SRU Service Residential Unit

The Service Residential Unit (SRU) offers users of the Self Install Si CPE uninterrupted voice connections, integrating voice and data services into a single unit. The SRU acts as a bridge between the Si CPE and the subscriber’s LAN, and has two POTS lines that support analog telephones, faxes and modems with a SIP based VoIP service, operating with common available SIP servers, proxies and soft switches. The SRU is powered from the mains, providing power also to the Si CPE, and has backup rechargeable batteries that ensure uninterrupted service during power outages for at least 2 hours with 10% voice calls.

2.2.4 Add-On Voice Gateways

Alvarion’s Add-On Voice Gateways provide functionality and features that are almost identical to those available with the Voice Gateway IDU, using either SIP or H.323 protocol. The Add-On Voice Gateways can be connected to either the Si CPE or to any Outdoor Subscriber Unit’s IDU (including a Voice or Networking Gateway IDU). The Add-On Voice Gateways, available with either 1 or 2 RJ-11 POTS ports, and can be cascaded to offer an increased number of telephone numbers.

2.2.5 BreezeMAX Wi2

Alvarion's BreezeMAX Wi² converged solution unites the advantages of the popular WiFi access with the powerful capabilities of BreezeMAX systems to provide cost-effective solutions for Personal Broad Band (PBB) services. The BreezeMAX Wi² system comprises a self-contained combination of an advanced WiFi access point and a BreezeMAX Subscriber Unit’s ODU that provides the backhaul connectivity. With its advanced roaming software, the BreezeMAX Wi² can be deployed almost anywhere to provide broadband mobility to standard WiFi (IEEE 802.11 b/g) end user devices. Using the BreezeMAX Wi², a BreezeMAX network can be used to provide personal broadband services to high-end business as well as residential users equipped with WiFi enabled devices such as laptops, PDAs, smart-phones, and portable gaming devices. As a converged system, the BreezeMAX Wi² also gives operators the ability to


seamlessly transition to a fully mobile WiMAX network with managed services for personal broadband users. The BreezeMAX Wi² system leverages the easy availability of WiFi technology - along with the power and robustness of BreezeMAX broadband wireless access system - to answer critical public and private sector needs such as traffic management, video surveillance, public Internet access, homeland security, and various nomadic applications. The BreezeMAX Wi² is a self-contained, robust all-outdoor system that comprises three elements:

A feature-rich WiFi (IEEE 802.11 b/g) Access Point (AP)

A BreezeMAX outdoor CPE (SU-ODU).

A power supply module that provides power to both the WiFi AP and the SU-ODU, using either an AC or a DC power source (with automatic switch over from AC to DC upon mains power failure).

With its easy installation and operation, high performance, and rich security and QoS feature sets, the BreezeMAX Wi² is an ideal solution for operators, municipalities and communities looking to build metropolitan broadband networks or to integrate WiFi hot zone capabilities into their existing broadband wireless access networks. The result is personal broadband services ranging from public Internet access to public safety and Intranet applications.


2.3 Base Station Equipment

The BreezeMAX Base Station Equipment offered by Alvarion includes:

The modular Base Station that can serve up to six sectors with various diversity configurations.

The stand-alone Micro Base Station, providing entry level low cost solution in places where the number of subscribers is limited, and fewer sectors are necessary.

GPS Receiver, necessary for maintaining synchronization among neighbouring sectors.

Power Feeders, required when the number of radios in diversity configurations exceeds the number of radios that can be powered directly by the Base Station.

2.3.1 Modular Base Station

The modular Base Station Equipment has a central networking and management architecture and is designed for high availability and a variety of diversity schemes. The Base Station is comprised of the following elements:

2.3.1.1 Base Station Chassis The Base Station Equipment is based on an 8U high cPCI (compact Peripheral Component Interconnect) shelf designed for installation in 19” or 22” (ETSI) racks. This chassis has a total of nine double Euro (6U high) slots and six single Euro (3U high) slots. All the modules are hot swappable, and high availability can be provided through multiple redundancy schemes. The six single Euro slots are intended for one or two redundant Power Interface Units (PIU) and up to four redundant Power Supply Units (PSUs). One of the double Euro slots is dedicated to the pre-certified ASN-GW (NPU) module. Another double Euro slot is reserved for an optional redundant NPU (NPU redundancy is not supported in the current release). The remaining seven double Euro slots are dedicated for Access Unit (AU) indoor modules, enabling various future redundancy configurations. Additionally, the Base Station chassis contains an air convection and ventilation fan tray (AVU).

2.3.1.2 Pre-Certified ASN-GW (Access Service Network Gateway) The pre-certified ASN-GW (NPU) is the “heart” of the BreezeMAX Base Station. The module serves as the central processing unit that manages the base station’s components


and the SUs served by it. It aggregates the traffic from the AU modules and transfers it to the IP Backbone through a dedicated Gigabit/Fast Ethernet interface. The pre-certified ASN-GW (NPU) main functions are:

Aggregate backbone Ethernet connectivity via a 100/1000 Base-T network interface.

Traffic classification and connection establishment initiation.

Policy based data switching.

Service Level Agreements management.

Centralized agent in the Base Station to manage all cell sites’ AUs and all registered SUs.

Base Station overall operation control, including AU diagnostic and control, PSU monitoring, AVU management and redundancy support.

Alarms management, including external alarm inputs and activation of external devices.

Synchronization, including GPS antenna interface, clock and IF reference generation and distribution to the Base Station modules as well as to other collocated Base Station chassis

DHCP Proxy functionality, enabling provisioning of IP Convergence Sublayer services to provides smooth upgrade to systems that fully support the IEEE 802.16e standard

An SNMP agent incorporated into the module enables extensive In Band (IB) management of the Base Station and all its registered SUs. Out Of Band (OOB) management is supported through a dedicated 10/100 Base-T interface. A serial RS-232 port supports local debugging and monitoring.

2.3.1.3 Access Unit (AU-IDU) The double Euro AU-IDU module contains the MAC and modem and is responsible for the wireless network connection establishment and for bandwidth management. Each AU-IDU connects to the NPU via the back plane. In addition, each AU-IDU connects to all other AU slots via the back plane over a shared bus. Each AU-IDU includes four channels using a common PHY and MAC that can connect to up to four outdoor radio units, according to the selected diversity mode. The AU-IDU module connects to the AU-ODUs via Intermediate Frequency (IF) cables carrying full duplex data, control and management signals between the AU-IDU and the AU-ODU, as well as power (-48 VDC) and 64 MHz synchronization reference clock from the AU-IDU to the AU-ODU. The IF Tx


and Rx frequencies are 240 MHz and 140 MHz, respectively. IDU-ODU service channel at 14 MHz serves for bi-directional control, status and management signaling.

2.3.1.4 AU-ODU The AU-ODU is a full duplex multi-carrier radio unit that connects to an external antenna. Utilizing high transmit power and low noise figure, It’s high system gain and interference robustness deliver high performance in terms in coverage and capacity.

2.3.1.5 Power Interface Unit (PIU) The single Euro PIU module is the interface between the Base Station site’s DC power source and the Base Station Chassis Power Supply Units and external ODUs, which receive power directly from the PIU via the back panel and the AU-IDUs. The PIU filters and stabilizes the Base Station input power and protects the system from power problems such as over voltage, surge pulses, reverse polarity connection and short circuits. It also filters high frequency interference (radiated emissions) and low frequency interference (conducted emissions) to the external power source. Each Base Station chassis contains two slots for an optional 1+1 PIU redundancy. One PIU is sufficient to support a fully populated chassis: the use of two PIU modules allow redundant power feeding (two input sources) while avoiding current flow between the two input sources. The regular PIU can support a total current of up to 30 A (@40.5 VDC). The High-Power PIU can support a total current of up to 58 A.

2.3.1.6 Power Supply Unit (PSU) The single Euro PSU module is a standard off the shelf cPCI (48VDC) power supply unit. Each Base Station chassis can contain up to four PSU modules providing N+1 redundancy configurations. The table below displays the number of PSU modules (excluding redundant units) required for various Base Station configurations without NPU redundancy (one NPU).

Table 2-1: PSU Requirements, Configurations with one NPU (excluding PSU redundancy)

Number of AU-IDUs Minimum Required Number of PSUs

1 - 2 1

3 - 4 2

5-6 3


2.3.1.7 Air Ventilation Unit (AVU) The 2U high AVU includes a 1U high integral chamber for inlet airflow and a 1U high fan tray with an internal alarm module. To support high availability Base Station, the fan tray includes 10 brush-less fans, where 9 fans are sufficient for cooling a fully loaded chassis. To further support high availability, the chassis may operate with the hot-swappable fan tray extracted from it for a period of time sufficient for replacing it.

2.3.2 Micro Base Station

The Micro Base Station Unit is designed to provide an alternative and low cost solution to the BreezeMAX full Base Station in places were the number of subscribers is limited, and fewer sectors are necessary (i.e. communities areas). The use of the same AU-ODU that is used by the modular Base Station provides an easy migration path and protection of the initial investment when the customer base increases and there is a need to replace the Micro Base Station with the full, modular Base Station equipment. The Micro Base Station equipment is comprised of an indoor Micro Base Station Unit and outdoor radio units (AU-ODUs). The Micro Base Station provides the full base station functionality necessary for serving either a single sector with second or fourth order diversity, or up to four sectors with no diversity. The Micro Base Station indoor unit is powered from a -48 VDC power source and its functionality is very similar to the combined functionalities of the NPU and AU-IDU modules of the modular Base Station.

2.3.3 GPS

GPS is used to synchronize the air link frames of Intra-site and Inter-site located sectors to ensure that in all sectors the air frame will start at the same time, and that all sectors will switch from transmit (downlink) to receive (uplink) at the same time. This synchronization is necessary to prevent Intra-site and Inter-site sectors interference and saturation (assuming that all sectors are operating with the same frame size and with the same DL/UL ratio). The GPS clock required is 1PPS with minimum accuracy of 10-11 and maximum jitter of 100ns. These GPS clock requirements can be reached by either an indoor or outdoor installed GPS unit when it is synchronized to at least 4 satellites. Two types of GPS Receivers are available from Alvarion:

Indoor GPS Receiver (with an outdoor antenna)

Outdoor GPS Receiver

A GPS Adapter is required to provide the interface between the NPU/Micro Base Station and the GPS Receiver.


2.3.3.1 Indoor GPS Receiver The Indoor GPS Receiver comprises a GPS receiver integrated with a stable OCXO oscillator, within a unit designed for mounting in a standard 19 inch rack. An up to 50 meter coaxial cable connects it to an active antenna. The indoor installed GPS system is able to provide up to 40 hours of clock holdover with a maximal drift of 50 microseconds when the GPS system losses satellites synchronization. The unit is powered directly from a -48 VDC power source.

2.3.3.2 Outdoor GPS Receiver The all-outdoor GPS Receiver is a pole mountable GPS receiver and antenna in a single environmentally protected enclosure. The Outdoor GPS Receiver is powered by a 12 VDC power source, supplied to it by the NPU/Micro Base Station via the GPS Adapter. The RS-422 interface allows installation at distances up to 100m.

2.3.3.3 GPS Adapter Unit The GPS Adapter connects the different GPS units to the NPU/Micro Base Station, adapting the different interfaces. Future versions may include an internal GPS module that will allow an all-in-one low-cost solution. A future optional addition of OCXO in the GPS Adapter box may provide an improved hold over solution when the GPS is not synchronized. The GPS Adapter is powered by 12 VDC supplied by the NPU/Micro Base Station. The GPS Adapter is installed in a 1U high panel (the same panel that is used for the Power Feeders).

2.3.4 Power Feeder

The Base station’s regular PIU can support a maximum current of 35 A. The High-Power PIU can support a maximum power of 58 A. In certain diversity configurations, the current that can be supported by the PIU is below the current required to power the Base Station and the necessary number of High Power AU-ODUs. The ODU Power Feeder is used as an additional power source providing power (-48 VDC) to AU-ODU-HP High Power ODUs. It transfers transparently all signals between the AU-IDU and the ODU, while injecting DC power received from an external source. Each ODU Power Feeder unit can serve up to four High Power ODUs. Up to three ODU Power Feeder units can be installed in a 1U high Power Feeder panel (that can be used also for mounting the GPS Adapter module). The following table displays the number of ODUs and Power Feeder modules required for various radio configurations:


Table 2-2: Number of AU-IDUs, AU-ODUs and Power Feeders Required for Various Configurations

PIU Type

Diversity Mode Number of Sectors (AU-IDUs)

Number of ODUs Required Number of Power Feeders

3 6 -

4 8 -

Second Order

6 12 1

3 12 1

4 16 2

Regular

Fourth Order

6 24 4

3 6 -

4 8 -

Second Order

6 12 -

3 12 -

4 16 -

High Power

Fourth Order

6 24 1

2.4 Networking Equipment

The Base Station is connected to the backbone through standard data communication and telecommunication equipment. The point-to-point link from the Base Station to the backbone can be either wired or wireless. Alvarion offers the DUET 6004, a V5.2 to SIP Access Gateway connecting a Class 5 switch over V5.2 to its’ SIP Voice Gateways.

2.4.1 DUET 6004S Access Gateway

The DUET 6004 is a carrier-grade V5.2 to SIP gateway, connecting a Class 5 switch over V5.2 to Alvarion's SIP add-on Voice Gateways (VG-1D1V and VF-1D2V) or Voice Gateway IDUs (IDU-1D1V and IDU-1D2V). The DUET 6004S is available in various configurations, supporting 2, 4, 8 or 16 E1s (up to 480 concurrent calls). A Local Exchange (LE) with the DUET 6004 support basic and advanced telephony services as CLASS services, IN services and others. The DUET can be either collocated with the BreezeMAX Base Station or installed at the LE premises concentrating the traffic of many Base Stations. The LE switch provides the call processing, billing and administrative functions, while the DUET provides the signaling translation and media conversion:


Signaling Translation: converting the V5.2 signaling into SIP commands and vice versa.

Media Conversion: converting media formats such as PCM to G.729A and others. It also provides additional media related services such as Echo Canceling and others.

Outbound SIP Proxy: The DUET operates as outbound SIP proxy for the Voice Gateways. All outbound calls from the user agents are sent to the DUET. Note that the DUET does not support SIP-to-SIP calls and all calls are always passed to the switch via the V5.2 interface.

Registration: Processing registration requests of the SIP Voice Gateways connected to the BreezeMAX CPE.

The DUET complies with the V5.2 interface standard second edition and the SIP RFC 3261, "SIP: Session Initiation Protocol", making it a certified means to provide telephony and advanced services over an IP network. It supports voice band data transmission of FAX G.3 (over G.711 or T.38), payphone signaling (Tax and reveres polarity), CLI, as well as other services that are hook flash based (call waiting, hold, call forward, etc.).

2.5 Management Systems

The end-to-end IP-based architecture of the system enables full management of all components, using standard management tools. An SNMP agent in the NPU/Micro Base Station implements standard and proprietary MIBs for remote setting of operational modes and parameters of the Base Station equipment as well as the Subscriber Units served by it. Security features incorporated in BreezeMAX units restrict the access for management purposes. In addition, the Ethernet WAN can be used to connect to other Operation Support Systems including servers, Customer Care systems and AAA (Authentication, Authorization and Admission) tools. Alvarion offers the following Management and Operation Support Systems:

AlvariSTAR Network Management System

AlvariCRAFT Device Manager

BreezeMAX Service Manager

2.5.1 AlvariSTAR™

AlvariSTAR is a comprehensive Carrier-Class network management system for Alvarion's Broadband Wireless Access products-based Networks. AlvariSTAR is designed for today's most advanced Service Providers' Network Operation Centers


(NOCs), providing the network Operation, Administration and Maintenance (OA&M) staff and managers with all the network surveillance, monitoring and configuration capabilities that they require in order to effectively manage the BWA network while keeping the resources and expenses at a minimum. AlvariSTAR is designed to offer the network's OA&M staff with a unified, scalable and distributable network management system. AlvariSTAR system uses a distributed client-server architecture, which provides the service provider with a robust, scalable and fully redundant network management system in which all single points of failure can be avoided. AlvariSTAR provides the following BWA network management functionality:

Device Discovery

Device Inventory

Topology

Fault Management

Configuration Management

Service Management

Data Collection

Performance Monitoring

Device embedded software upgrade

Security Management

Northbound interface to other Network Management Systems.

Management of DUET 6004S V5.2 Access Gateways Embedded with the entire knowledge base of BWA network operations, AlvariSTAR is a unique state-of-the-art power multiplier in the hands of the service provider that enables the provisioning of satisfied customers. AlvariSTAR dramatically extends the abilities of the service provider to provide a rich portfolio of services and to support rapid customer base expansion.

2.5.2 AlvariCRAFT™

AlvariCRAFT is an SNMP (Simple Network Management Protocol) application designed for on-line management of BreezeMAX system components. This utility simplifies the installation and maintenance of small size installations by easily enabling the change of settings or firmware upgrade for one Base Station at a time, including the managed device's components and associated SUs. AlvariCRAFT allows accessing a wide array of monitoring and configuration options, including:


Device Manager for the selected Base Station, including it's NPU, AUs and SUs

Selected unit configuration modification

Local Service Profiles verification and modification

Local Service Provisioning

Firmware upgrade for the NPU, AUs, Micro Base Stations and SUs

On-line performance data monitoring

Export of configuration details to a CSV file

Support for Telnet cut-through to the Base Station and http cut-through to Gateways behind connected SUs.

2.5.3 BreezeMAX Service Manager

BreezeMAX Service Manager provides centralized management of user authentication and authorization using the industry standard RADIUS protocol. The BreezeMAX Service Manager receives from the NPU/Micro Base Station (operating as a NAS) the authentication details (User Name and Password) upon network entry of a new CPE, and responds (if authentication if verified by matching details in the database) by sending properties of the Services that should be granted to the user. The BreezeMAX Service Manager is designed for entry level networks and can support up to 10 Base Stations and 10,000 Subscriber Units.


3 BreezeMAX Specification

3.1 Base Station and Micro Base Station Specifications

3.1.1 Radio specifications

Table 3-1: Base Station and Micro Base Station Radio Specifications

Item Description

Unit/Band Frequency (MHz))

AU-ODU-HP-2.3 2300 - 2360

AU-ODU-HP-2.3-WCS 2305 - 2317, 2348 - 2360

AU-ODU-HP-2.5A 2496 - 2602

AU-ODU-HP-2.5B 2590 - 2690

AU-ODU-HP-3.3a 3300-3355

AU-ODU-HP-3.3b 3345-3400

AU-ODU-HP-TDD-3.4a 3399.5 - 3455

AU-ODU-HP-TDD-3.4b 3455 - 3500

AU-ODU-HP-TDD-3.5a 3500 - 3555

Frequency

AU-ODU-HP-TDD-3.5b 3545 - 3600

Operation Mode TDD

Channel Bandwidth 3.5 MHz

5 MHz

Central Frequency Resolution

0.125 MHz

Antenna Port (AU-ODU) N-Type, 50 ohm

Max. Input Power (at antenna port)

-60 dBm before saturation, -8 dBm before damage

2.x GHz Units 36 dBm +/-1 dB maximum

Power control range: 6 dB, in 1 dB steps

3.3 GHz Units 32 dBm +/-1 dB maximum


Output Power (at antenna port)

3.5 GHz Units 34 dBm +/-1 dB maximum



Table 3-1: Base Station and Micro Base Station Radio Specifications

Item Description

Modulation OFDM in the Downlink,

OFDMA-16 in the Uplink (N x SUs per Symbol, N=1-16),

256 FFT points; BPSK, QPSK, QAM16, QAM64

FEC Convolutional Coding: 1/2, 2/3, 3/4

3.1.2 2.x GHz Antennas, Electrical Specifications

Table 3-2: 2.x GHz Antennas, Electrical Specifications

Item Description

BS ANT 60/2.X V 16.5 dBi minimum in the 2.3-2.7 GHz band, 60°AZ x 7°EL sector antenna, vertical polarization, compliance with ETSI EN 302 326-3 V1.2.1 (2007-01) and RoHS

BS ANT 90/2.X V 15.5 dBi minimum in the 2.3-2.7 GHz band, 90°AZ x 7°EL sector antenna, vertical polarization, compliance with ETSI EN 302 326-3 V1.2.1 (2007-01) and RoHS

BS ANT 120/2.X V 14 dBi minimum in the 2.3-2.7 GHz band, 120°AZ x 7°EL sector antenna, vertical polarization, compliance with ETSI EN 302 326-3 V1.2.1 (2007-01) and RoHS

BS ANT 60/2.X DP 2 x 17 dBi minimum in the 2.3-2.7 GHz band, 65°AZ x 7°EL sector antenna, dual slant +/- 45° polarization, compliance with ETSI EN 302 326-3 V1.2.1 (2007-01) and RoHS

BS ANT 90/2.X DP 2 x 15.5 dBi minimum in the 2.3-2.7 GHz band, 90°AZ x 8°EL sector antenna, dual slant +/- 45° polarization, compliance with ETSI EN 302 326-3 V1.2.1 (2007-01) and RoHS

BS ANT 120/2.X DP 2 x 13 dBi minimum in the 2.3-2.7 GHz band, 120°AZ x 8°EL sector antenna, dual slant +/- 45° polarization, compliance with ETSI EN 302 326-3 V1.2.1 (2007-01) and RoHS


3.1.3 3.x GHz Antennas, Electrical Specifications

Table 3-3: 3.x GHz Antennas, Electrical Specifications

Item Description

BS ANT 60V/3.3-3.8 16.5 dBi minimum in the 3.3-3.8 GHz band, 60° AZ x 7° EL, vertical polarization, compliant with ESTI EN 302 326-3 V1.2.1 (2007-01)

BS ANT 90V/3.3-3.8 14.5 dBi minimum in the 3.3-3.8 GHz band, 90° AZ x 7° EL, vertical polarization, compliant with ESTI EN 302 326-3 V1.2.1 (2007-01)

BS ANT 120V/3.3-3.8 13 dBi typical in the 3.3-3.8 GHz band, 120° AZ x 7° EL, vertical polarization, compliant with ESTI EN 302 326-3 V1.2.1 (2007-01).

BS ANT 60/3.5H 16 dBi typical in the 3.4-3.7 GHz band, 60° AZ x 9° EL, horizontal polarization, compliant with EN 302 326-3 V1.2.1 (2007-01)

BS ANT 90/3.5H 14 dBi typical in the 3.4-3.7 GHz band, 90° AZ x 8° EL, horizontal polarization, compliant with EN 302 326-3 V1.2.1 (2007-01)

BS ANT 60/3.5 DP 2 x 16.5 dBi minimum in the 3.3-3.8 GHz band, 65°AZ x 7°EL, dual slant +/- 45° polarization, compliance with ETSI EN 302 326-3 V1.2.1 (2007-01) and RoHS

BS ANT 90/3.5 DP 2 x 15.5 dBi minimum in the 3.3-3.8 GHz band, 90°AZ x 7°EL, dual slant +/- 45° polarization, compliance with ETSI EN 302 326-3 V1.2.1 (2007-01) and RoHS

BS ANT 120/3.5DP 2 x 13 dBi minimum in the 3.3-3.8 GHz band, 120°AZ x 7°EL, dual slant +/- 45° polarization, compliance with ETSI EN 302 326-3 V1.2.1 (2007-01) and RoHS

Omni ANT 3.4-3.6 10 dBi typical in the 3.4-3.6 GHz band, 360° AZ x 9° EL, vertical polarization


3.1.4 AU/Micro Base Station IDU – ODU Communication

Table 3-4: AU/Micro Base Station IDU - ODU Communication

Item Description

IF Frequency Tx: 240 MHz

Rx: 140 MHz

Ref Synchronization Frequency 64 MHz

ASK Bi-Directional Control Frequency 14 MHz

IF cable Impedance 50 ohm

Maximum IF cable Attenuation 10 dB @ 240MHz

7.5 dB @ 140MHz

8d B @ 64MHz

Minimum IF cable Shielding Effectiveness 90 dB in the 10-300 MHz band (double shielded cable)

Maximum IF cable Return Loss 20 dB in the 10-300 MHz band

Maximum IF cable DC Resistance 1.5 ohm

3.1.5 AU/Micro Base Station IDU - ODU Cable

Table 3-5: AU/Micro Base Station IDU - ODU Cable

Cable Type Maximum Length (m)

LMR-195 30

LMR-240 60

LMR-400 150


3.1.6 Data Communication (Ethernet Ports)

Table 3-6: Base Station and Micro Base Station Data Communication (Ethernet Ports)

Item Description

Standard Compliance IEEE 802.3CSMA/CD

Maximum Packet Size 1550 Bytes (including 4 CRC bytes and 4 VLAN tag bytes)

NPU Data Port 100/1000 Mbps, Full Duplex

Micro Base Station Data Port 10/100 Mbps, Full Duplex

Speed and Duplex

NPU/Micro Base Station Management Port

10/100 Mbps, Half/Full Duplex with Auto Negotiation

VLAN Support IEEE 802.1Q

Traffic Classification IEEE802.1p, DSCP

Traffic Prioritization IEEE 802.16a QoS (air interface)

3.1.7 Configuration and Management

Table 3-7: Base Station and Micro Base Station Configuration and Management

Item Description

Out Of Band (OOB) Management SNMP via Management port

Telnet via Management port

Monitor port

In Band (IB) Management via Data Port SNMP

Telnet

SNMP Agents SNMP ver 1 client

MIB II (RFC 1213), Private BreezeMAX MIBs

Authentication RADIUS

Software upgrade Using TFTP

Configuration upload/download Using TFTP


3.1.8 Standards Compliance

Table 3-8: Base Station and Micro Base Station Standards Compliance

Type Standard

EMC ETSI EN 300 489-1/4

ETSI EN 300-385

Safety EN 60950-1

UL 60 950-1

Environmental ETS 300 019:

Part 2-1 T 1.2 & part 2-2 T 2.3 for indoor & outdoor

Part 2-3 T 3.2 for indoor

Part 2-4 T 4.1E for outdoor

Radio ETSI EN 301 021 V.1.6.1

ETSI EN 301 753 V.1.1.1

FCC 04-135

FCC 27.53

3.1.9 Environmental

Table 3-9: Base Station and Micro Base Station Environmental Specifications

Type Unit Details

AU-ODU-HP-2.3-WCS -52°C to 55°C

All other ODUs -40°C to 55°C

Outdoor GPS Receiver -40°C to 85°C

Outdoor Antenna of Indoor GPS Receiver :-40°C to 70°C

Operating temperature

Indoor equipment 0 o C to 40 o C

Outdoor units 5%-95% non condensing, Weather protected

Operating humidity

Indoor equipment 5%-95% non condensing


3.1.10 Mechanical

Table 3-10: Base Station and Micro Base Station Equipment, Mechanical Specifications

Unit Dimensions (cm) Weight (kg)

BST-SH 8U ETSI type shelf, 8U x 43.19 x 24 6.9 (excluding AVU)

PIU 3U x 5HP x 16 0.35

High-Power PIU 3U x 5HP x 16 0.45

PSU 3U x 8HP x 16 0.7

NPU 6U x 7HP x 16 0.7

AU-IDU 6U x 7HP x 16. 0.6

AVU 2U x 84HP x 16 1.7

Micro Base Station 1U ETSI type shelf, 1U x 44.4 x 27.2 3

AU-ODU (except AU-ODU-HP-2.3-WCS) 32.9 x 15.7 x 16.9 6.1

AU-ODU-HP-2.3-WCS (incl. Cavity Filter) 32.9 x 15.7 x 20.9 8.6

GPS Adapter 15.7 x 14.6 x 3.17 0.4

Outdoor GPS Receiver Tubular enclosure, 15.5 D x 12.7 H 0.363

Indoor GPS Receiver 1U x 30.8 x 21.3 1.4

Power Feeder Module 15.7 x 14.6 x 3.17 0.6

Panel for Power Feeders/GPS Adapter 1U ETSI type panel 0.14

* 1U=44.45 mm (1.75”), 1HP=5.08 mm (0.2”)


3.1.11 Electrical

Table 3-11: Base Station and Micro Base Station Equipment, Electrical Specifications

Unit Details

PIU (regular) Power Source: -40.5 to -60 VDC

Power Consumption: 16W maximum

Maximum Supplied Current: 35 A

High-Power PIU Power Source: -40.5 to -60 VDC

Power Consumption: 35W maximum

Maximum Supplied Current: 58 A

PSU 200W maximum output power Efficiency: 80% minimum

NPU 65W maximum, 44W typical, excluding power that may be required for GPS Adapter (1.2W max) and Outdoor GPS Receiver (6W max)

AU-IDU 46W maximum, 39W typical

AVU 24W maximum, 23W typical

Micro Base Station Power Source: -40.5 to -60 VDC

Power Consumption: 87W maximum, excluding power that may be required for GPS Adapter (1.2W max) and Outdoor GPS Receiver (6W max)

AU-ODU-HP-2.x GHz Tx (DL) 89W maximum, 75W typical

Rx (UL) 15W maximum, 9W typical

AU-ODU-HP-3.x GHz Tx (DL) 90W maximum, 62W typical

Rx (UL) 20W maximum, 14W typical

ODU Power Feeder Power Source: -40.5 to -60 VDC

Power Dissipation: 2W per channel

GPS Adapter 12 VDC from the NPU/Micro Base Station, 1.2W maximum

Indoor GPS Receiver Power Source: -36 to -72 VDC

Power Dissipation: 20W maximum, 12W typical

Outdoor GPS Receiver 12 VDC from the NPU/Micro Base Station via the GPS Adapter, 6W max


3.1.12 Services

Table 3-12: Base Station and Micro Base Station Services Specifications

Item Description

Max number of Services Base Station: 4,095

Micro Base Station: 1,023

Max number of Service Profiles per Base Station/Micro Base Station

1024

Max number of Forwarding Rules per Base Station/Micro Base Station

255

Max number of Priority Classifiers per Base Station/Micro Base Station

255

Max number of QoS Profiles per Base Station/Micro Base Station

255

Max number of Subscribers per Base Station/Micro Base Station

1,024 (applicable only for permanent SUs)

Min number of data connections per Service 2 (1 uplink, 1 downlink)

Max number of data connections per Service 8 (4 uplink, 4 downlink)

Max number of data connections per SU 32 per direction

Max number of data connections per AU/Micro Base Station

AU: 3,999 - 3 x number of SUs

Micro Base Station: 3,072 - 3 x number of SUs

(3 connections are reserved for each SU)

Max number of Served SUs AU: 510

Micro Base Station: 250

Max number of MAC addresses in Bridging Table

Base Station: 6,000

Micro Base Station: 1,000

SU: 512

(Aging time is configurable. The default is 3 minutes for SU, 10 minutes for NPU/Micro Base Station)

Max number of VLANs per Service 16

Max number of VLANs per SU 16

Max number of VLANs (VPL IDs) per Base Station/Micro Base Station

1,024

Max number of concurrent voice calls per Voice/L2 Service

50

Max number of concurrent voice calls per AU/Micro Base Station

AU: 300

Micro Base Station: 50


3.2 PRO-S CPE Specifications


Table 3-13: PRO-S CPE Radio Specifications (TDD Operation Mode)

Item Description

Band Frequency (MHz))

2.3 GHz 2300 - 2360

2.5 GHz 2496 - 2602

Frequency

3.5 GHz 3399.5-3600

Operation Mode TDD, Half Duplex


5 MHz


0.125 MHz

Antenna Port (PRO-SE) N-Type, 50 ohm

2.3 GHz Integral Antenna (PRO-SA)

13 dBi typical, 33°AZ x 27°EL, vertical/horizontal polarization, compliant with RoHS and EN 302 326-3 V1.2.1 (2007-01)






-20 dBm before saturation, 0 dBm before damage


19 dBm +/-1 dB maximum

ATPC Dynamic range: 45 dB

Modulation OFDM modulation, 256 FFT points; BPSK, QPSK, QAM16, QAM64



3.2.2 IDU - ODU Communication

Table 3-14: PRO-S CPE IDU - ODU Communication

Item Description

Cable Type Category 5E, Outdoor Data Cable, Double Jacket, 4x2x24# FTP

Maximum Length 100 meter (from ODU to the user’s equipment connected to the IDU)

3.2.3 Data Communication (Ethernet Port)

Table 3-15: PRO-S CPE Data Communication (Ethernet Ports)

Item Description



Speed and Duplex 10/100 Mbps, Half/Full Duplex with Auto Negotiation





Table 3-16: PRO-S CPE Configuration and Management

Item Description

Local Management via Ethernet Port Telnet

Built-in web configuration server (using PC or PDA with http browser)

Remote Management Via the Base Station

Software upgrade Using TFTP via the Base Station

Using TFTP via Ethernet port

Configuration upload/download Using TFTP via the Base Station




Table 3-17: PRO-S CPE Standards Compliance

Type Standard

EMC ETSI EN 300 489-1/4

ETSI EN 300-385

Safety EN 60950-1

UL 60 950-1

AS/NZS 3260 (Australia / New Zealand)


Part 2-1 T 1.2 & part 2-2 T 2.3 for indoor & outdoor

Part 2-3 T 3.2 for indoor

Part 2-4 T 4.1E for outdoor


ETSI EN 301 753 V.1.2.1

3.2.6 Environmental

Table 3-18: PRO-S CPE Environmental Specifications

Type Unit Details

ODU -40°C to 55°C Operating temperature

IDU 0 o C to 40 o C

ODU 5%-95% non condensing, Weather protected Operating humidity

IDU 5%-95% non condensing


3.2.7 Mechanical

Table 3-19: PRO-S CPE Mechanical Specifications

Unit Dimensions (cm) Weight (kg)

CPE-IDU-1D 14 x 6.6 x 3.5 0.3

CPE-ODU-PRO-SA 21 x 21 x 5.4 1.25

CPE-ODU-PRO-SE 21 x 21 x 5.4 1.13

3.2.8 Electrical

Table 3-20: PRO-S CPE Electrical Specifications

Item Details

Power Consumption Total: 22W

IDU: 5.5W

ODU: 16.5W

CPE-IDU Power Input 100-240 VAC, 47-63 Hz

CPE-ODU Power Input 54 VDC from the IDU over the indoor-outdoor Ethernet cable


3.3 Si CPE Specifications


Table 3-21: Si CPE Radio Specifications (TDD Operation Mode)

Item Description

Band Frequency (MHz))

2.3 GHz 2305- 2360

2.5 GHz 2496 - 2602

Frequency

3.5 GHz 3399.5-3600

Operation Mode TDD, Half Duplex


5 MHz


0.125 MHz

Internal Antennas A beam switching antennas array providing 360° coverage.

Antenna gain (typical): 7 dBi for 2.x GHz units, 9 dBi for 3.5 GHz units

External Antenna Port SMA, 50 ohm


-20 dBm before saturation, 0 dBm before damage


2.3 GHz: 23 dBm +/- 1 dB maximum



ATPC Dynamic range: 45 dB minimum

Modulation OFDM modulation, 256 FFT points; BPSK, QPSK, QAM16, QAM64



3.3.2 Data Communication (Ethernet Port)

Table 3-22: Si CPE Data Communication (Ethernet Ports)

Item Description



Speed and Duplex 10/100 Mbps, Half/Full Duplex with Auto Negotiation





Table 3-23: Si CPE Configuration and Management

Item Description

Local Management via Ethernet Port Telnet

Built-in web configuration server (using PC or PDA with http browser)

WiMAX Modem Installation Utility

Smart Card

Remote Management Via the Base Station

Software upgrade Using TFTP via the Base Station


Configuration upload/download Using TFTP via the Base Station




Table 3-24: Si CPE Standards Compliance

Type Standard

EMC ETSI EN 300 489-1/4

FCC part 15 Subpart B

Safety EN 60950-1

UL 60 950-1

AS/NZS 3260 (Australia / New Zealand)


Part 2-1 T 1.2 & part 2-2 T 2.3

Part 2-3 T 3.2


ETSI EN 301 753 V.1.2.1

3.3.5 Environmental

Table 3-25: Si CPE Environmental Specifications

Type Details

Operating temperature -5 o C to 45 o C

Operating humidity 5%-95% non condensing

3.3.6 Mechanical and Electrical

Table 3-26: Si CPE Mechanical and Electrical Specifications

Item Details

Dimensions (mm) 167 (H) x 170 (L) x 79 (W)

Weight (g) 650

Power Consumption 12.5W maximum

DC Power Input (from Power Supply) 7.3 VDC

Mains Power Input (to Power Supply) 90-256 VAC, 47-63 Hz


3.3.7 Detached 3.5 GHz Antenna

Table 3-27: Detached 3.5 GHz Antenna Specifications

Item Details

Frequency Range 3400 - 3700 MHz

Gain (excluding cable) 12 dBi

Polarization Linear-Vertical

Beam Width 77° Horizontal, 17° vertical

Connector SMA jack

Dimensions (cm) 33 x 9.3 x 2.1

Weight (g) 190

3.3.8 Detached 2.x GHz Antenna

Table 3-28: Detached 2.x GHz Antenna Specifications

Item Details

Frequency Range 2300-2700 MHz

Gain (excluding cable) 9.5~10.5 dBi

Polarization Linear-Vertical

Beam Width 70° Horizontal, 20° vertical

Connector SMA jack

Dimensions (cm) 32.7 x 8 x 2.2

Weight (g) 600


4 Benefits

BreezeMAX is the cornerstone of Alvarion’s OPEN WiMAX strategy. WiMAX Certified™ and 802.16e-based, the system offers:

WiMAX architecture based on the WIMAX ForumTM standard implementation of the IEEE 802.16e and ETSI HiperMAN industry specifications for wireless access in metropolitan area networks (MAN).

No installation fees for operators at customer premises enabled by self install (Si) and indoor CPE capabilities, along with a user-friendly installation CD or smartcard to allow automatic provisioning for homes and deliver instant broadband.

Scalable base station configuration suited for customer-specific needs. This includes an attractive basic service offering of the macro base station with multi-channel support for a low entry level of all base stations, for both dense and sparse populated deployments.

Open infrastructure enabling integration with innovative future services on the same base station designed to support fixed, nomadic and mobile applications.

Maximum flexibility in network design and frequency allocation, supporting a wide range of frequencies and FDD/TDD operation for different channel bandwidths.

Secure carrier investment ensured by CPEs designed with enhanced capabilities for simple software upgrades to 802.16e, FDD/TDD, uplink sub-channelization, and rapid antenna selection.

Superior coverage and capacity – high base station output power and integrated advanced antenna capabilities in the base station; intelligent antenna schemes and best AU selection support in the self install CPE.

Low cost of ownership supporting pay-as-you-grow infrastructure for higher return on investment (ROI) and minimal CAPEX/OPEX while enabling operators to penetrate new market segments rapidly.

Feature-rich product portfolio enabling mass residential urban deployments for delivering data, voice and Wi-Fi services.

Nomadic solution offering central provisioning capabilities using AAA Radius server.

Advanced quality of service capabilities for triple play services such as admission control capabilities with redundancy.


Carrier class services – designed for carrier grade deployments meeting the most demanding requirements of large service providers with high throughput and availability, component redundancy, and a flexible network management system (NMS).

Complete primary voice service offering for tier 1 operators, including core GW for both legacy (V5.2) and NGN networks and residential CPEs with integrated POTS, battery back up, class 5 features and voice admission control.

AlvariSTAR Network Management System – a carrier-class network management system that simplifies network deployment and enables rapid expansion of a service provider’s customer base with effective fault management for quick resolution.


5 Features and Applications

5.1 Base Station Architecture and Diversity Configurations

5.1.1 Base Station Radio Components

The Base Station architecture is based on the following components:

Multi-Channel Access Unit/Micro Base Station, supporting 4 channels with a modem and MAC mechanism common to all channels.

High Power Outdoor Radio Units (ODUs).

Dual Slant 45° Polarization Antennas allowing 60°, 90° or 120° sector coverage using up to four ODUs and two dual-slant antennas.

5.1.2 Radio Configurations

The 4-Channels AU/Micro Base Station support the following radio configurations:

5.1.2.1 Single Channel, No Diversity This is the minimal configuration, where the AU/Micro Base Station connects to one ODU, serving a single sector with a directional antenna.

5.1.2.2 Multi Modem Channels (MMC): Multiple Channels, No Diversity Up to 4 channels can be used to cover several sectors, where each channel connects to one ODU, with one ODU per sector. A single AU/Micro Base Station can cover a 360° cell. Where the coverage of the cell can be built from 3 sectors of 120° each with frequency reuse 1, or 4 sectors of 90° each with frequency reuse 1 (i.e. frequency per sector) or 1/2 (i.e. 2 frequencies for 4 sectors where each frequency is used for 2 opposite sectors). All ODUs served by the same AU/Micro Base Station share a common MAC and modem. Each ODU is managed separately. The following figure describes the multi modem channel use to cover a cell of 360° with 4 sectors, using frequency reuse 1:


The following figure describes the multi modem channel use to cover a cell of 360° with 4 sectors, using frequency reuse 1/2:

5.1.2.3 Second Order Diversity Configuration Second order diversity allows coverage of one or two sector with space diversity by a single AU/Micro Base Station, where each sector is covered by two ODUs. The same frequency and transmit power are set for both ODUs serving the same sector (in the current release one sector can be served by each AU/Micro Base Station).

F4

F3

F2

F1

AU/ μBST

Channel-1

ODU-2 Sector 2

Antenna-1 ODU-1 Sector 1

ODU-3 Sector 3

ODU-4 Sector 4

Channel-2

Channel-3

Channel-4

Antenna-2

Antenna-3

Antenna-4

Figure 1: Four sectors multi modem configuration, frequency reuse 1

F2

F1

F2

F1

AU/ μBST

Channel-1

ODU-2 Sector 2


ODU-3 Sector 3

ODU-4 Sector 4

Channel-2

Channel-3

Channel-4

Antenna-2

Antenna-3

Antenna-4

Figure 2: Four sectors multi modem configuration, frequency reuse 1/2


5.1.2.4 Fourth Order Diversity Configuration Multiple channel configuration with fourth order diversity allows a single sector coverage by the Micro Base Station with 4 ODUs. In each sector, both space and polarization diversities are implemented, using dual polarization slant antennas. The channels are paired: channels 1 and 2 form one pair, channels 3 and 4 form the second pair. The two ODUs connected to each pair are connected to the same dual polarization antenna. The same frequency and transmit power are set for all four ODUs. All ODUs served by the same Micro Base Station share a common MAC and modem.

F2

F1

AU/ μBST

Channel-1

ODU-2 Sector 1


ODU-3 Sector 2

ODU-4 Sector 2

Channel-2

Channel-3

Channel-4

Antenna-2

Antenna-3

Antenna-4

Figure 3: Second Order Diversity, Two Sectors per AU/Micro Base Station

AU/ μBST

Channel-1

ODU-2 Sector 1

Dual Polarization

Antenna-1

ODU-1 Sector 1

ODU-3 Sector 1

ODU-4 Sector 1

Dual Polarization

Antenna-2

Channel-2

Channel-3

Channel-4

F1

Figure 4: Fourth Order Diversity, One Sector per AU/Micro Base Station


5.1.3 Diversity Schemes

5.1.3.1 Transmit Diversity The system enables implementation of a quadrature diversity model where the transmit diversity includes space diversity between the dual antennas and polarization diversity for each antenna. The downlink diversity utilizes a fourth order Space Time Coding (STC) algorithm. The Space and Time Coding algorithm is based on conveying in each two-time slots period a special combination representing the information of two symbols, to enable full combining diversity at the receiver without any effect on overall rate. This second order diversity mechanism is further enhanced to a fourth order diversity scheme by manipulation in the time domain of the signals transmitted by each antennas pair, to artificially create a multipath effect. The combining mechanism at the receiver takes advantage of the excellent multipath performance of OFDM. The achieved improvement in the overall link budget is further increased by the benefits available through the antenna switching mechanism in the CPE.

Two different Fourth Order Diversity modes are available, with a different downlink diversity scheme optimally adapted to the specific propagation conditions prevailing in the relevant deployment scenario. Fourth Order Diversity for NLOS should typically be used when all or most of the SUs operate in Non-Line-Of-Sight (NLOS) conditions (typical to CPE Si units). Fourth Order Diversity for LOS and NLOS mode will provide better oberall performance in deployments where there are SUs operating in both Line-Of-Sight (LOS) conditions (expected for most CPE-PRO S units) and Non-Line-Of-Sight (NLOS) conditions.

5.1.3.2 Rx Diversity The fourth/second order receive diversity based on four or two antennas utilizes Maximum Receive Ratio Combining (MRRC) diversity method. MRRC diversity is based on combining the received signals, where the signals are weighted in accordance with their SNR levels.

5.2 OFDMA in the Uplink

The use of Orthogonal Frequency Division Multiple Access (OFDMA) in the uplink allows simultaneous transmission from several users, with only a fraction of the sub-carriers assigned to each user. The use of uplink sub-channelization provides the following advantages:

Ability to connect SUs with relatively poor link conditions: reducing the amount of uplink sub-channels from 16 (full bandwidth) to 8, 4, 2 or 1 sub-channels enables increasing the maximum transmit power of the SU by 3, 6, 9 or 12 dBm, respectively.


Better utilization of uplink capacity, by enabling several SUs to share the bandwidth at the same time.

BreezeMAX utilizes OFDMA-16, where the original symbol may be divided into 1, 2, 4, 8 or 16 sub channels considering the capacity demand of the CPEs. This allows several CPEs to use the uplink simultaneously where each CPE uses different sub carriers, with up to 12dB gain in the upstream link budget.

The Uplink sub-channelization influences the ATPC and dynamic rate selection (multirate) mechanisms that must be adapted accordingly.

5.3 Automatic Transmit Power Control

The Automatic Transmit Power Control (ATPC) algorithm simplifies the installation process and ensures optimal performance while minimizing interference to other units. The dynamic control of CPE’s transmit power avoids Rx saturation in the Base Station, reduces near/far and ACI effects and improves frequency reuse. This is achieved by automatically adjusting the power level transmitted by each CPE according to the actual level at which it is received at the Base Station. The algorithm is based on RSSI measurements and CPE’s capabilities. The CPEs have a dynamic range in excess of 45 dB to efficiently support a very wide range of distances and link qualities.

The use of OFDMA requires tighter uplink power control to reduce interference between sub-channels and to take into account changes in received power resulting from a varying number of sub-channels used by each CPE in the uplink. As mentioned before, when keeping the transmit power of a certain CPE at the same level, the RSSI in the Base Station of transmissions using a single sub-channels will be higher by 12dB than the RSSI of transmissions using all 16 sub-channels.

Due to the demand-based allocation of sub-channels in the uplink, CPEs with different link conditions may share the uplink, and the number of channels allocated to each CPE may vary also. The enhanced ATPC algorithm takes into account all the variables that influence the expected quality of the signal received at the Base Station, and decrease/increases accordingly the requested transmit power.

5.4 Adaptive Modulation and Coding Scheme

The quality of the uplink and downlink is continuously monitored to control the modulation and coding schemes. Harsher environmental conditions, can force a more robust burst profile. Good conditions may allow operation with a more efficient burst profile. The Multirate mechanism adapts each CPE’s current UL and DL burst profiles, ever striving to achieve a balance between robustness and efficiency and optimize tradeoff between capacity and error rate.


Most of the links, most of the time, use high order modulation to maximize capacity. “Bad” links, use lower modulation maximizes availability. The algorithm is based on link quality information, such as error rate, SNR and multipath, and is aimed at optimizing tradeoffs between modulation scheme and coding rate. The adaptation algorithm is highly dynamic, with the ability to change the burst profile on a per frame basis.

Due to the demand-based allocation of sub-channels in the uplink, the optimization mechanism must take into account the number of allocated sub-channels and the properties of other CPEs that share the uplink during any burst. The decisions of the multirate and ATPC algorithms must be made together, since overall performance depends on both.

5.5 Spectrum Scanning and Best BST/AU Selection

The Spectrum Scanning mechanism enables quick scanning of a list of legitimate frequencies to find out the frequencies received by the CPE with a strong enough signal. This constitute the first phase of the Best BST/AU Selection mechanism aimed at allowing automatic network entry without prior knowledge of the Base Station/AU that will eventually serve the CPE. The frequencies found during the Spectrum Cycle process are arranged in a list in accordance with measured performance (SNR) for each of the relevant antennas.

The Best BST/AU Selection mechanism is based on trying to establish network entry in each of the viable frequencies/antennas, and, if network entry ends successfully, measuring the SNR of a valid signal. Network entry is possible only for Base Station/AU included in a list of legitimate BST/AU IDs. A shorter list of preferred BST/AU IDs may be used to give priority to certain Base Stations/AUs. Selection is based on SNR measurement, with reduced priority for AUs that are too loaded currently.

5.6 Indoor CPE with Multiple Antennas with Fast Switching

The SI CPE includes an integral internal array of 6 antennas, providing full 360° coverage. A bi-directional switching matrix allows using either the same or different antennas for transmit and receive. A detached wall/window mounted antenna, also connected to the bi-directional matrix, is available for situations where the internal antennas may not be sufficient for wireless connectivity with the Base Station.

In an indoor environment, the existence as well as the location and motion of obstacles and reflecting elements may change any time, causing varying multipath effects and other changes in link conditions. Therefore, the uplink and downlink are monitored continuously, to ensure selection of the best antenna at any given moment.


5.7 Multiple Business Models for CPE Distribution

The only end-user’s dependent parameters are its User Name and Password, required to guarantee provisioning of the required services. To support a wide range of business models of the network operator, the SI CPE may be provided to the end-user in any of the following configurations:

A fully configured unit, including the end-user’s dependent parameter (User Name and Password).

A Smart Card that that includes the end-user’s dependent parameters, which is supplied directly to the end-user. The SI CPE can be supplied separately, either by the network operator or by a third part.

A user-friendly installation utility provided with the SI CPE (by either the network operator or a third party) that guides the end-user throughout the installation process, including entry of its User Name and Password. The User Name and Password may be supplied to the end user in various methods such as by mail or telephone. The optional Installation Utility, designed for non-professional end-users, provides several benefits to both the end-user and network operator: Full step-by-step guidance during the installation process, including connecting the

unit to the end-user’s data equipment and positioning the unit for optimal operation. Automatic problem detection and identification of any failure point in the link from the

user’s PC to the network resources (during both installation and regular use). Integrated monitoring and configuration options that typically should be used only for

problem solving during calls to the network operator’s help center. If there is no communication with the unit, customers service personnel can guide the end-user over the phone how to access specific options for viewing necessary quality indicators and parameter and modifying the configuration, if necessary. This may eliminate the need to send a technician to the end-user’s premises and reduce down time. The network operator may use a special web site that communicates with the utility,

enabling automatic updates and configuration changes on a per-need basis.

5.8 Automatic Authentication and Service Provisioning

Authentication of, and service provisioning to new CPEs is performed automatically upon network entry of the CPE, enabling the end-user to get immediate service. The agreed upon services are pre-configured in either the Base Stations or in a central Radius server. A central Radius server enables simple and highly effective management of services allocated to end-users. It is the ideal solution for scenarios where there is no prior knowledge of the actual location of the CPE. Upon network entry, the Base Station passes the end-user’s unique identification (User Name and Password) to the Radius server that


will send back the complete details of the services that should be allocated to it. If at any time the CPE connects to a different Base Station (due to reasons such as a change in either the CPE’s location or restructuring of the wireless system), the new Base Station will get the same details from the Radius server, enduring services continuity. This is clearly better than the alternative of pre-configured the services in all Base Station with which the CPE may connect, now or in the future. This allows also simpler control of services, such as service denial for non-paying customers or timeout for pre-paid services. To support its customers, Alvarion offers an entry level BreezeMAX Service Manager that can fulfill the service provisioning needs of systems serving up to 10,000 CPEs.

5.9 Applications

BreezeMAX is designed to meet the business needs of Established Carriers, supporting a wide range of applications and delivery of quality services to different customer groups:

5.9.1 Residential Home Networking and SOHO Customers

In typical residential and SOHO applications the SU is connected to a number of PCs to provide data services using the. Voice and fax services can be provided with Alvarion’s Voice Gateways, taking advantage of either the proprietary DRAP protocol or using standard SIP solutions to enable efficiently managed VoIP services. Advanced IP suite features as well as wireless connectivity (802.11b/g) to WiFi devices throughout the customer’s premises can be provided with Alvarion’s Networking Gateway IDU.

5.10 Services

5.10.1 Service Types

The currently supported services include:

5.10.1.1 PPPoE Tunneling Access PPPoE Access service provides connectivity between a PPPoE enabled workstations at the subscriber's site and PPPoE aware Access Concentrator at the Base Station.


5.10.1.2 Layer 2 VPN (LAN Access) The LAN Access service transports Layer 2 (Ethernet) frames between subscriber's site and a resource located behind the Provider’s Backbone using VLAN. It is assumed that the backbone either supports encapsulation of the Layer 2 frames or routes the frames according to the Layer 3 protocol, which might be different than IP. The resource in general is assumed to be a corporate network.

5.10.1.3 VoIP Telephony The Voice over IP (VoIP) service provides telephony services through an external Voice Gateway connected to the Subscriber Unit’s data port. Efficient support of VoIP services can be based on either (or both) of the following:

VoIP services for Alvarion’s Voice Gateways, using the proprietary DRAP signaling protocol to identify VoIP sessions and to verify optimal handling of these sessions.

VoIP services for Alvarion’s SIP Gateways. The managed VoIP solution uses AF (Application function) entity that is used as a SIP proxy and PF (Policy function) entity that communicates with the NPU/Micro Base Station to manage admission control of the voice calls in the BreezeMAX system.

Upon provisioning of such a service, the system automatically handles Signaling and RTP connections establishment, including QoS issues.

5.10.2 Quality of Services

BreezeMAX supports Grant Per Connection operation, where bandwidth is granted explicitly to each connection. Each connection is mapped to a scheduling service. Each scheduling service is associated with a set of rules. The supported scheduling services are:

Unsolicited Grant Services (UGS), also called Continuous Grant (CG), is tailored for carrying constant bit- rate (CBR) real-time services characterized by fixed size data packets on a periodic basis such as VoIP or E1/T1. The Base Station schedules regularly, in a preemptive manner, grants of the size defined at connection setup, without an explicit request from the Subscriber Unit. This eliminates the overhead and latency of bandwidth requests in order to meet the delay and jitter requirements of the underlying service.

Real-time Polling Services (rtPS) is designed to meet the needs of Real Time Variable Bit Rate (RT-VBR) like services characterized by requirements for guaranteed rate and delay such as streaming video or audio. These services are dynamic in nature, but offer periodic dedicated requests opportunities to meet real-time requirements. Because the Subscriber Unit issues explicit requests, the protocol overhead and latency is increased, but capacity is granted only according to the real needs of the connection. Service parameters include Committed Burst (CB) and Committed Time (CT), which define the rate. Rate =CB/CT.


Non-real-time Polling Services (nrtPS) is very similar to the real-time polling service except that connections may utilize random access transmit opportunities for sending bandwidth requests. These Non Real Time Variable Bit Rate (NRT-VBR) services, such as file transfer and Internet access with a minimum guaranteed rate, are characterized by requirement for a guaranteed rate, but can tolerate longer delays and are rather insensitive to jitter. Service parameters include Committed Information Rate (CIR) and Maximum Information Rate (MIR).

Best Effort (BE) service is also available for services where neither throughput nor delay guarantees are provided. The Subscriber Unit sends requests for bandwidth in either random access slots or dedicated transmission opportunities. The occurrence of dedicated opportunities is subject to network load, and the Subscriber Unit cannot rely on their presence. Service parameters include Maximum Information Rate (MIR).

5.10.3 Classification

Differentiated SLAs to various services can be based on a number of classifiers. The service provider can define certain service profiles. Each profile figures a complete set of parameters of certain service type. The available classifiers vary according to the specific service’s properties, and include:

Traffic type Classifier parameter

Data IP traffic VLAN ID, 802.1p and DiffServ

PPPoE traffic Ethertype value

Voice using Alvarion Residential Gateway IP address and UDP port

External voice VLAN ID, 802.1p and DiffServ

5.11 Privacy and Network Segmentation

5.11.1 Network Privacy using 802.1Q VLANs

BreezeMAX supports Virtual LAN (VLAN) based on IEEE 802.1Q standard. Each user’s (or groups of users) traffic can be transmitted on a separate VLAN, thus allowing network segmentation and providing complete privacy of the user traffic in the wireless access network. VLANs can be used for creating within the BreezeMAX network virtual groups of multiple end-users (stations) belonging to the same organization (Subscriber). They may also be used to differentiate between different end-users (stations) connected to the same SU. The VLAN functionality of the SU differs from that of the Base Station. The SU operates in transparent mode: If no VLAN ID is defined (the VLAN ID List is empty), frames with a


VLAN ID tag will pass. The SU can also support Hybrid VLAN mode, passing both tagged and untagged frames. In the backbone, VPL ID (Virtual Private Link ID) is used. VPL is a virtual connection between two points on the network, such as a base station and a service provider or corporate network, identified by the VPL ID, with functionality that is similar to VLAN ID (VLAN on the backbone network). Typically it is used to separate between different traffic types (e.g. Data and Voice), or traffic from/to different ISPs or different corporate networks. If the VPL ID is None (No VPL ID), frames with a VLAN ID tag arriving from the downlink (the infrastructure side) will be discarded.

5.11.2 PPPoE Service support

PPPoE (Point-to-Point Protocol over Ethernet) Access service provides connectivity between a PPPoE enabled devices at the subscriber's site and a PPPoE aware Access Concentrator behind the Base Station. The frames are forwarded only between the Subscribers' PCs and the PPPoE Access Concentrator. Frames that are not PPPoE Ethertype are discarded. In the uplink frames are never relayed but only forwarded to the Access Concentrator. In the downlink, broadcasts are allowed only in cases of unknown addresses.

5.11.3 Forwarding definitions

The BreezeMAX Base Station has full control on forwarding and relaying of user traffic in the wireless network. Relaying means the ability of the Base Station to relay traffic received from wireless link back to the wireless link. The Base Station allows defining different forwarding rules for each service defined in the system. The following options are available in the BreezeMAX system:

Unicast Relaying: the Unicast Relaying parameter determines whether the Base Station performs unicast relaying. When the Unicast Relaying parameter is enabled, unicast packets originating from devices on the wireless link can be transmitted back to the wireless link devices. If disabled, these packets are not sent to the wireless link even if they are intended for devices on the wireless link.

Broadcast Relaying (L2 Service Type only): the Broadcast Relaying parameter determines whether the Base Station performs broadcast relaying. When the Broadcast Relaying parameter is enabled, broadcast packets originating from devices on the wireless link are transmitted by the Base Station back to the wireless link devices, as well as to the backbone. If disabled, these packets are sent only to the backbone and are not sent back to the wireless link.

Unknown Forwarding Policy (L2 Service Type only): the Unknown Forwarding Policy parameter determines the mode of controlling the flow of


information from the backbone to the wireless media. Select from the following options:

1 – Reject: The Base Station will transmit packets only to those addresses that the Base Station knows to exist on the wireless link side.

2 – Forward: Enables the transmission of all packets, except those sent to addresses that the Base Station recognizes as being on its wired backbone side.

5.12 High Availability

A carrier grade system that provides critical services to numerous subscribers must guarantee high base station availability to ensure uninterrupted services to its customers. BreezeMAX is designed to support multiple redundancy schemes to ensure high base station availability at all times. PICMG 2.1 R.2 compliant Hot Swap and Redundancy Control busses on the back plane support hot-swap insertion/extraction of cards, dynamic system/units configuration and redundancy schemes. The staged (multi-length) make-break pins in the CompactPCI connector of all cards, together with on-board sophisticated power supply management and Hot Swap ready indicators of the NPU and AU-IDU cards, support full hot-swap capability. The system recognizes insertion/extraction of cards and acts accordingly to update the configuration and ensure smooth continued operation.

5.12.1 PIU Redundancy

Each Base Station chassis contains two PIU slots for 1+1 redundancy. One PIU is sufficient to support a fully populated chassis: the use of two PIUs allows redundant power feeding (two input sources), avoiding current flow between the two input sources.

5.12.2 PSU Redundancy

Each Base Station chassis can contain up to four PSUs providing N+1 redundancy configurations up to 3+1 redundancy for a fully populated Base Station chassis. All PSUs work in current sharing mode: when one PSU fails, the rest take over (accepting extra load) and continue operation without interruption. In the event of a PSU failure, the NPU receives an alarm and reports to the NMS.

5.12.3 AVU Fans Redundancy

To support high availability Base Station, the fan tray includes 10 brush-less fans, where 9 fans are sufficient for cooling a fully loaded chassis. To further support high availability, the chassis may operate with the hot-swappable fan tray extracted from it for a period that is sufficient for replacing the fan tray.

breezemax tdd functional description 070727

Documents