Wireless Technologies That Make the World Go Round
Wireless technology is everywhere. Whether
it's buzz about something new or a product currently available, I
cannot go through a day without reading or bumping into something
related to wireless technology.There are seven built in
wireless technologies that make the world go round. When I say "built
in" I'm talking about products which have wireless technology
inside the device. Most familiar to most people are Wireless USB,
Bluetooth and RFID. However, there are four more technologies you
should at least know about. So here are all seven technologies: WUSB,
Bluetooth, RFID, WiMedia, UWB, NFC and ZigBee.
WiMedia refers to the Ultra Wide Band radio platform which enables
high data transfer rates. The goal of WiMedia is to standardize the
protocols or code used in wireless devices. For example, WiMedia
standards are used in Ultra Wide Band (UWB), Bluetooth and WUSB
technology products. The end result for a consumer is that WiMedia
guarantees wireless devices work together without an end-user knowing
about set-up procedures or configuration options. I guess you could
say plug-n-play, but we are talking about wireless.
UWB or Ultra Wideband
- UWB is wireless technology operating in a radio frequency greater
then 500MHz. What this means is that UWB is excellent for sending a
lot of data wirelessly.
The transfer of data on this radio frequency
works as a pulse. Due to the extremely low emission levels allowed by
the FCC, UWB systems tend to be short-range and indoors. With the
short duration of these pulses it's easier to transfer high amounts of
data, but can also be engineered to transfer less data over a longer
distance. It's the give-n-take of UWB.
An example of high data transfer rates using
the UWB technology would be wireless computer monitors or digital
camcorders playing video without the need of a host computer or wired
connection to the TV.
WUSB or Wireless USB
- Wireless USB is the combination of high speed data transfer rates
with the ease-of-use of USB connectivity. WUSB takes USB one step
further and removes the cable from the connection.
WUSB uses the Ultra Wide Band radio frequency
technology and standard. What WUSB has done to the UWB is adopt the
necessary protocols to have it work with USB connectors (or ports). As
with Bluetooth, wireless USB is ideal for short range networks -
usually called personal networks.
WUSB has become very strong in personal
networks around the office, for example networking your PC together
with mouse, keyboard, printer and camera is usually done via WUSB.
Bluetooth has become very popular for personal networks in relation to
mobile devices, such as cell phones, headsets and PDAs.
What WUSB really brings to the table is the
wide range of products using the connection standard of USB to a world
About Wireless USB
Bluetooth is a short range radio communications method ideal for small
networks - usually called personal networks. Bluetooth is unique
because it has three different classes to define how far it will
communicate; 1 meter, 10 meters and 100 meters.
An example of a personal network would be a
Bluetooth headset and it's base unit, or mobile phone. Another example
would be a wireless network between your PC, keyboard, mouse and
Bluetooth works at the same frequency as many
cordless telephones and microwaves - the 2.4GHz range - but since the
power output is very small there are no real health concerns with
RFID or Radio Frequency Identification
- RFID is an automatic identification method used to assign an ID to
an item. Most common is an RFID tag placed on an object. The tag is
really a silicon chip which houses an internal antenna. When an
external electrical current hits the RFID tag a response is generated
which tells the ID of the object.
There are two types of tags. 1) Passive - a
tag which does not have internal power, but rather uses the electric
pulse sent to it to wake-up and send a response. 2) Active - a tag
which uses internal power to provide an ID response.
Two examples you can identify with would be a
passive RFID tag used in a shopping mall or clothing store. These are
tags attached to clothing (or item) which sound a store alarm when not
An example of the active RFID tag would be the
toll-road transponders. Here you have a battery powered RFID unit that
communicates with the toll-road service to auto charge your account
for use of the road.
NFC or Near Field Communication
- NFC is a wireless technology aimed at being used in mobile phones.
The premise of this technology is based off magnetic field induction.
Another words, a magnetic field is used to activate a device when in
close proximity. The furthest distance NFC works is 20 centimeters -
so I'm talking real close!
In interesting example would be walking past a
movie poster and waving your cell phone in front of it to download the
trailer. A real world example is using your mobile phone to make a
payment and rather then swipe a credit card you would simply touch the
phone to a terminal and the transaction would be executed. This
technology is also being implemented into credit cards.
ZigBee - Is a
wireless protocol used in low-powered devices that don't transfer a
lot of data, need a long battery life and communicate on a secure
network. The ZigBee technology is based of RF or radio frequency
A practical example of the ZigBee technology
is a home network system controlling items such as lights, security
systems, fire alarms, heating and air conditioning. This example
demonstrates each "item" needing to communicate with a central station
and have low data transfer needs (light on, light off) along with a
long battery life.
In the picture you can see the red lines as
routing links where the wireless signal "touches" each device along
with a grey link which leads to an end point, or control point.
If you notice, I have not included WiFi and
the reason is simple. WiFi is not a technology embedded into a
product. In addition, WiFi needs configuration and is not plug-n-play
as the technologies mentioned above. The strength in WiFi is the
ability to handle multiple devices over a longer distance while
maintaining high transfer rates.
Keep in mind, this article is a high-level
overview of built-in wireless technologies and there is an infinite
amount of information available for each technology.