Technological improvements in the broadband wireless arena have
been rapid and significant in recent years, offering operators
greater performance and flexibility in their deployments while
reducing their investment risks and ongoing operating expenses.
The 802.16/HiperMAN for 2-11 GHz is a wireless metropolitan area
network (MAN) technology that provides broadband wireless
connectivity to Fixed, Portable and Nomadic users. This powerful OFDM and NLOS technology can be used to backhaul 802.11 hotspots
and WLANs to the Internet, provide campus connectivity, and
enable a wireless alternative to cable and DSL for last mile
broadband access.
It provides up to 50 kilometres of service area range, allows
users to get broadband connectivity without needing direct line
of sight with the base station, and provides total data rates of
hundreds of Mbps per base station - a sufficient amount of
bandwidth to simultaneously support hundreds of businesses with
T1/E1- type connectivity and thousands of homes with DSL-type
connectivity with a single base station.
Based on IEEE 802.16 and ETSI HiperMAN - WiMAX selected the
common mode of operation of these two standards - 256FFT OFDM.
Concentrated in 2-11GHz Wireless MAN (Metropolitan Access
Networks), with the following set of features:
- Service area range 50km;
- Non Line of Sight;
- QoS designed in for voice/video, differentiated services;
- Very high spectrum utilization: 3.8 bit/Hz;
- Up to 280Mbps per base station;
- True broadband for portable users - based on IEEE 802.16e
enables the creation of a ‘CPE-less’ broadband market,
providing broadband connectivity for laptops and PDAs with
integrated;
- WiMAX technology.
The following table illustrates the improvement and advancement
of Broadband Wireless technologies between 2000 - 2005 as well
as the evolution from proprietary to Standard-based solutions:
|
Broadband Wireless Progress Chart |
|
Period (Years): |
2000 - 2001 |
2002 - 2003 |
2004 - 2005 |
|
Solution: |
Proprietary > > > > > > > > > Standard based WiMAX |
|
Data Rate: |
2 - 11 Mbps |
6 - 54 Mbps |
Up to 72 Mbps |
|
Chip Set: |
802.11/b RF and
PHY or proprietary |
Vendors develop their own;
some use 802.11/a RF & PHY |
Volume Silicon Supplier |
|
Air Interface: |
Frequency Hopping;
Direct Sequence |
OFDM and SCDMA
approches |
256 FFT
OFDM and OFDMA |
World Wide Wireless delivers a comprehensive range of features,
all of which make it the solution of choice for operators
seeking to start building their WiMAX networks today. The system
provides the following product features and benefits:
- NLOS coverage - Advanced Orthogonal Frequency Division
Multiplexing (OFDM) modulation enhances performance in
Non-Line-Of-Sight (NLOS) conditions to ensure immunity to
interference and multi-path conflicts typical of deployments
in densely populated urban areas;
- End-to-end QoS - Advanced QoS capabilities in the 802.16
MAC, 802.1P and DSCP classification and prioritization
functions ensure true end-to-end QoS and support high
quality data, voice and video services;
- Adaptive modulation technology - maximizes the bandwidth
throughput of the system over large distances by
automatically adjusting modulation to respond to various
signal qualities;
- AlvariSTAR management system - Carrier class NMS platform
that supports full FCAPS functionality, remote software
upgrade to multiple devices and integration via standard
interfaces to higher level network management systems
- WiMAX architecture - Based on the WIMAX Forum's standard
implementation of the IEEE 802.16 and ETSI HiperMAN industry
specifications for wireless access in Metropolitan Area
Networks;
- Addressing multiple markets - Suitable for serving
residential, business, MDU/MTU, hotspot, backhauls, and
wireless home networking applications;
- Low cost ownership - Supports simple installation and
demand-based "pay-as-you-grow" build-outs of all World Wide
Wireless systems, World Wide Wireless enables operators to
penetrate new market segments rapidly and to build out their
networks while minimizing CAPEX;
- Carrier class - Meets the most demanding requirements of
large service providers with high throughput and
availability, component redundancy, and flexible Network
Management System (NMS);
- Scalable base station configurations - High density base
station suitable for large-scale deployments in both dense
urban and suburban areas. The micro base station, is an
ideal, cost-effective solution for providers seeking to
penetrate rural and low-density areas;
- High capacity and throughput - Base station full duplex and
multi-channel functionality enables a single base station to
support very large numbers of subscribers. Highly efficient
and robust 802.16 air protocol provides high broadband rates
up to 54 Mbps of net throughput per subscriber.
Telecommunications is on the verge of an unprecedented wave of
infrastructure investment fuelled by the dramatic growth of
Internet applications, the replacement of existing circuit based
networks and the upgrading of cellular phone technology from the
second generation and 2.5 generations to the third generation
communication systems (3G).
As the World Wide Wireless Radio Series has so many unique
features, it can be used in a number of applications for
existing and future infrastructures, some of which are
illustrated below:
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The World Wide Wireless Radio products are ideal for creating a
Wireless Loop that broadcasts the World Wide Wireless
services to end users throughout a city, town or region. Users
will subscribe to the service and have a base station in their
premise suited to their application.
The Last Mile Solution extends and distributes a large Telco’s
infrastructure to areas where laying cables seems unfeasible due
to high costs associated with terrain, population densities
and/or other factors. The World Wide Wireless
Radio is capable of providing the final tail in this situation
where it connects the end of the cable, for example, Optic
fibre, to the end users via radio links.
The broadband voice gateway CPE provides integrated voice and
data services for residential and SOHO users and is available in
two models:
- One 10/100 Base-T data port and one RJ-11 voice POTS port;
- Four 10/100 Base-T data ports (switched) and two RJ-11voice POTS ports.
Featuring advanced voice and data functions such as VLAN
tagging, traffic prioritization by IP DiffServ, H.323 and SIP
protocols support, Class 5 voice services (3-Party conference,
call waiting, call hold), integrated management and more, the
broadband voice gateway CPE presents an ideal single box
solution for operators seeking to serve combined broadband voice
and data services.
