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    • Sistemas inalámbricos DOCSIS

Ejemplos de Instalaciones

CMM Multicanal Amplia Sistema con Repetidoras Bi-Direccionales

La empresa CMM Multicanal de Asunción (Paraguay) acaba de ampliar la cobertura del sistema inalámbrico de Internet instalando repetidoras bi-direccionales de banda ancha para proporcionar el servicio de Internet inalámbrico a varias áreas que sólo tenían servicio de Televisión de MMDS hasta la fecha.

Con los nuevos repetidores bidireccionales, los subscriptores de Televisión en las áreas afectadas podrán también subscribirse al servicio de Internet inalámbrico. 

Las repetidoras bi-direccionales de Cable AML con potencia de 10 Vatios proporcionan servicio de televisión e Internet Inalámbrico en una área de varios kilómetros de radio.  

Según Carlos Esteche, “ha sido realmente fácil instalar las repetidoras sin que haya habido prácticamente ninguna interrupción del servicio de Televisión a los abonados existentes.”
Carlos Esteche, Julio Fernández y Miguel Orsuza inspeccionan la antena de recepción previa la instalación de la misma. Antenas instaladas en la torre de la repetidora.


Receptores Exteriores Para DOCSIS Inalámbrico

Cable AML ha fabricado varios receptores de retorno de estación base a frecuencias especiales para varios sistemas inalámbricos de Internet en las ciudades de Siauliai y Panevezys, Lituania.

Según Jevgenij Plaksin de la empresa operadora BALTICUM TV, los receptores de estación base de intemperie permiten aumentar la capacidad del sistema de manera rentable al permitir la sectorización del segmento de retorno del sistema.

La empresa Balticum TV es uno de los operadores de Televisión por Cable más grandes en Lituania, proporcionando servicio de “triple play” ( Tele-visión, Internet y Telefonía IP). La empresa ha estado proporcionando servicio de cable módem DOCSIS en su planta del cable desde 1999 y servicio inalámbrico de Internet en su sistema de MMDS de Kalipeda desde el año 2002.

Los receptores de Cable AML se instalaron en Noviembre de 2005 en Siauliai y en diciembre en Panevezys. Ambos lugares están ahora en servicio comercial proporcionando servicio a los subscriptores de Internet del sistema.


Receptores de intemperie para retorno de DOCSIS inalámbrico instalados en Lituania

Sistema Inalámbrico de Datos Instalado en Baja California


Rubén Bárcenas durante el curso de capacitación del sistema en Cable AML

Un sistema inalámbrico de datos de banda ancha fue instalado en La Paz, Baja California (México) para servir como sistema de reserva a una fibra de alta capacidad.

El sistema BWA-2002 de Cable AML proporciona servicio de datos IP de alto rendimiento entre una estación base y varias estaciones remotas. Dado que el sistema utiliza la arquitectura punto a multipunto, puede fácilmente ampliar servicio a nuevas estaciones remotas.

La estación base del sistema fue instalada en el mismo sitio previsto para un sistema MMDS de TV, con el que comparte el mismo transmisor y antena.

Este sistema muestra cómo los sistemas inalámbricos de datos pueden proporcionar redundancia para transmisión de datos por fibra con altos requisitos de confiabilidad en ambientes urbanos densos donde actividades relacionadas a la construcción de edificios ocasiona interrupciones frecuentes debidas a cortes en la fibra.


Sistema Inalámbrico de Banda Ancha Para Nigeria

Mr. Sam Ikoku, President of Proper Communications, Inc. with the BWA-2002 base station equipment

Cable AML ha fabricado un sistema inalámbrico de datos de banda ancha para ser instalado en Abuja, Nigeria, en junio de 2003. El sistema, que proporciona conectividad para datos de doble vía y alta velocidad, es el primero de varios sistemas que serán instalados por la empresa Proper Communications en las ciudades mas importantes del país. 

El sistema opera en la banda de MMDS normalmente usada para datos y video multicanal, aunque estará dedicado exclusivamente a datos de alta velocidad y aplicaciones de voz sobre IP (VoIP). La fuerte demanda de acceso a Internet y los recientes adelantos en equipos de telefonía IP hacen financieramente atractiva la idea de ofrecer estos servicios como la aplicación primaria del sistema. Las modalidades de servicio que pueden ofrecerse a costo competitivo incluyen servicios de usuario a usuario, telefonía local y telefonía a larga distancia. Una de las razones principales por las que Cable AML empezó a desarrollar en 1998 sistemas inalámbricos compatibles con las especificaciones IP de DOCSIS fue por las aplicaciones futuras de voz sobre IP .

El sistema usa un módem de cabecera (CMTS) standard tipo DOCSIS y módems de usuario tipo cable módem. En la estación base hay un transceptor de banda ancha modelo ITRX02-100C, seleccionado para poder transmitir portadoras de datos múltiples y portadores de TV digital a una distancia de por lo menos 25 kilómetros.


2.5 GHz System for Multi-channel TV and Two-Way Data

Cable AML has delivered the first BWA-2002D+ system to be installed in South East Asia. The system simultaneously broadcasts multi-channel analog and/or digital TV and provides two-way IP connectivity for High-Speed Internet Access and other IP high performance applications.

The system is based on Cable AML's broadband Transceiver Model TRX02-250C, a compact yet powerful unit which provides multi-carrier downstream capability and high-sensitivity upstream receive functionality specifically designed for wireless Internet service.

The macro-cell system is designed to provide 180- degree azimuth coverage to a distance of 20 Kms with a single base station. The base station also houses the TV headend and the NMS (Network Management System) for the two-way data system. All of the base station indoor equipment (transceiver, headend modem termination system and network management system) fits in a single enclosed rack.

The system allows operators to combine two services through a single base station infrastructure for maximum revenue at minimum capital deployment cost. Two revenue streams can be realized from different subscribers: multi-channel residential TV service and two-way high-speed Internet access for residential and institutional subscribers.


Broadband 3.5 GHz Fixed Wireless System Delivered

Cable AML has delivered a state-of-the-art FWA (Fixed Wireless Access system) operating in the 3.5 GHz band. The system was designed to meet the requirements of a recently auctioned fixed wireless 3.5 GHz band in Asia.

Cable AML's BWA-2003 provides a standards-based wireless platform for enabling next-generation IP-based services. The system allows 27 Mbps shared data bandwidth per sector, with easy expansion capability up to 100 Mbps, while maintaining full IP functionality.

The BWA-2003 is an open, modular system, which is attractive to operators because they no longer need to worry about proprietary systems that can quickly become obsolete. The BWA-2003 provides High-speed Internet access, LAN Extensions, Virtual Private Networking, Voice over IP, Video Conferencing, Distance Learning and Dedicated High-speed connections in a single, powerful and rugged package.

The BWA-2003 features shared access based on the latest FDM/TDM/TDMA technology for maximum flexibility, power and capacity. The system provides high-speed connectivity to a large number of subscribers with high spectral efficiency, thanks in part to features such as programmable modulation formats (64-QAM downstream and QPSK and 16-QAM upstream).


Two-Way Repeater Expands Coverage of Broadband Wireless System

Cable AML has delivered a bi-directional (two-way) repeater designed to extend service to a "shadow" area within the main beam of an MMDS system that simultaneously broadcasts one-way multi-channel video and provides two-way data service.

Cable AML's model IAR02-030 on-frequency, active, bi-directional repeater allows extension of coverage to areas not illuminated by the main antenna. Systems originally designed in a macro-cell configuration for multi-channel video distribution (MMDS) service often have pockets of subscribers which can not receive signals due to line-of-sight blockage from natural or man-made obstacles and/or topographic features such as mountains or depressions. Cable AML's two-way repeaters are designed to extend the reach of these systems to simultaneously provide multi-channel video and two-way data coverage.

The repeater was installed to illuminate the area near downtown Asuncion (Paraguay). The area includes most of the central business district, and it has a relatively low density of TV subscribers but a high-density of two-way data subscribers. Cable AML's repeater is a viable and cost-efficient approach to extending two-way data service to a high yield area.

The repeater, model IAR02-030, is a bi-directional, broadband, multi-carrier active repeater designed to operate upstream in the 2.150 to 2.162 GHz band and downstream in the 2.5 to 2.7 GHz band. Other models with higher power levels and at other frequency bands are available.


Broadband Wireless Access System Deployed in Beijing

Cable AML has delivered key hardware for a multi-channel Broadband Wireless Access System for two-way data communications and online services in the People's Republic of China (PRC). Using point-to-multipoint wireless technology as the "last-mile" solution, the system will make it possible to offer high-speed Internet connections to schools and business customers in Beijing.

"Wireless is the best way to rapidly offer high-speed Internet service in China," said Jeffrey G. Sun, CEO of ASPAC Communications Inc., "We believe that the BWA-2001 system will allow us to quickly get subscribers on line and provide wireless services cost effectively. The Internet market in China has grown over 150% to 22.5 million users in the past year and this rapid pace of growth is continuing. The timing of this opportunity is excellent for ASPAC."

Cable AML's family of BWA (Broadband Wireless Access) systems is a flexible and scalable point-to-multipoint "last mile" broadband solution system designed to provide high-quality, low-cost, high-speed Internet and other telecommunications services to the customers.

ASPAC Communications, Inc. (ASPAC, www.aspac-com.com) is a leading provider of fixed wireless broadband interactive communications and online services in the People's Republic of China (PRC) through its joint venture subsidiary YeeYoo.net (YeeYoo). ASPAC's joint venture partners include China Education and Research Network (CERNET), second largest ISP in China, and Beijing Sino-Tech Science and Technology Development Center (SINOTECH). The combination of CERNET and SINOTECH provide the joint venture with access to over 20,000 kilometers of nationwide fiber backbone and operation services, reaching 35 major cities or over hundreds of millions of potential clients in the People's Republic of China (PCR).


Broadband Wireless Access System Delivered in MMDS Band

Cable AML has delivered a BWA 2002 integrated broadband wireless access system. The BWA-2002 System is a full-duplex, two-way, fixed-wireless communication system operating in the MMDS / MDS frequency bands (2.500 to 2.686 GHz for downstream and 2.150 to 2.162 GHz for upstream). 

The system is designed to co-exist with an existing multi-channel analog TV distribution service. Future upgrades under consideration include additional channels of two-way data and a digital upgrade of the multi-channel video system. 

The main application of the system is for high-speed Internet access, although other IP-centric services such as LAN (Local Area Network) extension, VPNs (Virtual Private Networks) and VoIP (Voice over IP) can also be implemented depending on market conditions. 

The BWA-2002 system utilizes the 2500 to 2686 MHz MMDS band for downstream transmission. The band is divided into thirty-one channels, each 6 MHz wide. Each downstream data channel has a throughput of 30 Mbps (using 64 QAM modulation format). The upstream channels are in the 2150 to 2162 MHz band. Upstream channels of 0.2 MHz to 3.2 MHz bandwidth can be implemented. Upstream data throughput is up to 5.12 Mbps with QPSK modulation or 10.24 Mbps with 16QAM-modulation.

As with any system developed by Cable AML, this BWA equipment was integrated at our Torrance facility and tested as a system.

When the testing was completed, the customer's engineering staff attended a comprehensive training program on system deployment, operation, and maintenance at the Cable AML factory in Torrance. The training was conducted under near operational conditions using the customer's own equipment. This approach to training serves to make field deployment and operation more effective.


Cable AML Offers IP-Based Broadband Wireless Access System

A new addition to state-of-the-art wireless technology has recently been unveiled by Cable AML - an IP-based, full-duplex, two-way, Broadband Wireless Access System.  The system, dubbed the BWA-2002, is a fixed-wireless communication platform primarily intended for applications such as high-speed Internet access, LAN extension, virtual private networks (VPN's) and voice over IP (VoIP) applications using the MMDS frequency band (2.1 - 2.6 GHz).

The MMDS spectrum is sub-divided into 31 channels, each 6 MHz wide.  Each individual channel can be assigned for either down-stream data transport or TV distribution.  Each downstream channel can provide a data throughput of 30 Mbps with 64 QAM modulation format, or six compressed digital TV programs, or one standard VSBAM NTSC analog TV program (PAL/SECAM programs can be implemented with a different channel plan).  Upstream transport is implemented by multiplexing 3 carriers for every 6 MHz of available bandwidth.  Each QPSK-modulated carrier has a nominal bandwidth of 2 MHz and provides an upstream data throughput of 2.56 Mbps.

"Since the BWA-2002 is designed to operate within the standard MMDS channelization scheme, it offers MMDS operators the opportunity to substantially increase revenues for a moderate incremental investment," says Norman Woods, Vice President of Cable AML.  "By adding high-speed data transport functionality to their current offering of TV distribution, operators can attract new subscribers and offer their current subscribers more services."

The BWA-2002 is one of several systems in the BWA-2000 family of Broadband Wireless Systems developed by Cable AML.  Other models operate in the 3.4 to 3.6 GHz and 10.15 to 10.65 GHz bands.

Cable AML is a global provider of Point-to-Point Microwave Links for multi-channel applications and Point-to-Multipoint Wireless Access Systems (including LMDS, LMCS and MMDS) at frequencies from 2 to 42 GHz.  The company's products include four families of Broadband Access Systems for fixed-wireless applications as well as broadband analog and digital transmitters, receivers, repeaters, and transceivers for multi-channel digital and analog links.  Having produced hundreds of systems for cable, wireless cable, and telecommunications customers in more than 22 countries, Cable AML has a proven capability of designing and implementing systems optimized to fit local infrastructure and frequency regulations.


Cable AML Demonstrates Broadband Wireless Access System

A new addition to state-of-the-art wireless technology has recently been unveiled by Cable AML-an IP-based, full-duplex, two-way, Broadband Wireless Access System. The system, dubbed the BWA-2002, is a fixed-wireless communication platform primarily intended for applications such as high-speed Internet access, LAN extension, virtual private networks (VPN's) and voice over IP (VoIP) applications using the MMDS frequency band (2.1 to 2.6 GHz). 

The BWA-2002 is one of several systems in the BWA-2000 family of Broadband Wireless Systems developed by Cable AML. Other models operate in the 3.4 to 3.6 GHz and 10.15 to 10.65 GHz bands. 

The BWA-2002 is designed to operate within the standard MMDS channelization scheme, where the available spectrum is sub-divided into 31 channels, each 6 MHz wide. Each individual channel can be assigned for either down-stream data transport or TV distribution. 

Each downstream channel can provide a data throughput of 30 Mbps with 64 QAM modulation format, or one standard VSB-AM NTSC analog TV program (PAL/SECAM programs can be implemented with a different channel plan). 

Upstream transport is implemented by multiplexing 3 carriers for every 6 MHz of available bandwidth. Each QPSK-modulated carrier has a nominal bandwidth of 2 MHz and provides an upstream data throughput of 2.56 Mbps. 

The BWA-2002 consists of three key subsystems: the headend, the RF transceiver/antenna, and the Customer Premises Equipment (CPE). 

The headend typically houses one or more modems (HMTS or Headend Modem Termination Systems), an SNMP-based integrated Network Management System, and a QoS (Quality of Service) module. Each HMTS can service thousands of subscribers and provides three full-duplex (bi-directional) Ethernet 10BaseT data interfaces to a switched hub. The 10BaseT ports on the switched hub provide direct connectivity to local headend servers and access to Internet and remote servers via a router. 

The RF transceiver/antenna configuration is determined by the system requirements, and can be either co-located with the data equipment or remotely connected via wireline or microwave STL. 

The CPE equipment includes an integrated antenna/outdoor transceiver and an indoor modem. 

Cable AML is a leader in the development and implementation of Broadband Wireless Access Systems. In fact, the BWA-2000 access platform is only one of four access platforms developed over the last two years. 

Our complete Broadband Wireless Access Product Line makes it possible to match the optimum platform to each customer's requirement. Contact Cable AML Sales for further information.