The Marriage of Communications and Computing
Wireless Computing
Andrew Seybold
Imagine
that you are in a meeting with your notebook computer open in front of you. Suddenly, the
cursor begins to blink and a new e-mail message is displayed on the screen. Your computer
isn't plugged into anything, your cellular phone is in your briefcase under the table, but
you are receiving e-mail over the wireless network. How is this possible?
Over the past ten years, the communications and
computer industries have developed new technology products that enable mobile workers to
be more productive. As a result, our work force is able to spend more working hours in the
field.
Today's mobile workers number some 45 million in
the United States alone. They've gone from simple beepers to lightweight mobile phones;
from 30-pound luggables to 5-ounce pocketable PCs. The devices are lighter and more
powerful, but they're still separate devices with limited ability to work together to
support the mobile worker's need to access their own e-mail, connect to their corporate
information resources, and perhaps to send and receive faxes. Palmtops and mobile phones
alone are no longer enough.
The merger of computing and
communications
The computing and communications industries have
been working together for the last five or six years to provide mobile workers with the
same level of access to their computing data as they have to people via their mobile voice
phones. Wireless networks originally developed for voice communications have been expanded
to serve as wireless data pipes. Further, in more than a dozen countries including the
United States, data-only wireless networks have been built and put into service.
Fortunately, the new wireless voice systems
being implemented today are based on digital technologies, as are the existing data-only
networks. In addition, most of the older analog wireless networks are being upgraded to
digital. Digital networks are better suited to data, and most are capable of providing
both voice and data communications.
With the recent success of palmtop and handheld
computers, as well as the emergence of a new generation of still smaller and lighter
mobile computers, there is renewed interest within the computing community for wireless
data access. But implementing wireless data remains a complex and expensive proposition.
Because the many wide-area networks and many different digital standards, computer vendors
have been frustrated in their efforts to build wireless communications solutions into
their mobile computers. Communications companies have had to find ways to enable their
communications devices in the computing world. They've developed a number of solutions,
each with it's own set of problems.
The communications industry has been trying to
find a solution that would enable mobile computing devices to connect to their wireless
networks. Computer companies have been trying to find a way to connect their devices to
wireless networks. While they share the same goal, each industry has been focusing on its
own technology without adequate consideration of the requirements of the other.
At Long Last: Bluetooth!
Eventually, companies from both industries
decided that they needed to work together to find a common solution. They knew that there
was a demand to merge mobile computing with mobile communications, and they understood the
problems.
The result of their collaboration will be a
technology code-named "Bluetooth." Rather than trying to design computers so
they will work with any wireless interface card or modem on any frequency, using any one
of a number of digital technologies, they decided to design a single, common radio that
could be built into every mobile computer?
The computer and radio combination could then be
optimized to minimize interference -- a task made easier for computer engineers with only
one radio. And with a single-radio solution, computer vendors are no longer faced with
having to make a network choice or supporting multiple networks.
The Bluetooth communications device is a small,
low-powered radio on a microchip. It "talks" to other Bluetooth-enabled
products, eliminating the need for cables or infrared beams to connect portable computers,
cellular phones, printers, fax machines, etc. Bluetooth will make it possible to connect
enabled devices on a one-to-one or one-to-many basis.
Since the chip supports both voice and data
communications, applications will range from something as simple as replacing the cable
between a mobile computer and cellular phone, to more complex connections involving
multiple computers, and extending into hands-free voice communications for wireless phones
in vehicles.
A "win" for the computer and communications industry
Bluetooth appears to be a "win" for
the computer industry. Most computer manufacturers have been unable to determine which
wide-area networks to support. Bluetooth eliminates the need for a wide-area network
decision. This can be left to the makers of phones and modems and other wide-area network
devices. As an added bonus, the inexpensive built-in radio makes it easy to quickly
connect two or more Bluetooth equipped devices locally.
Computer manufacturers have known for some time
that wireless communications will be important for mobile computers. The Bluetooth
solution provides a short-range ad hoc network, enabling users to send and receive e-mail
without a phone and synchronize their calendar and phone book automatically whenever the
two devices detect each other's presence.
Bluetooth also appears to be a "win"
for the communications industry. Communications companies will no longer have to build
external cables and PC cards to connect mobile data devices to their wireless phones. Nor
do they have to build wireless network cards for the mobile user to interface with company
computers. A Bluetooth module built into the mobile phone or connected to the network will
enable these devices to send and receive data to and from any Bluetooth-equipped mobile
computer.
The "compelling" reasons for
incorporating Bluetooth are to wirelessly connect mobile computers to cellular phones, and
to establish small workgroups quickly and easily. As the number of Bluetooth-equipped
devices grows, so will their uses. Printers, fax machines, LANs, and more will be able to
communicate with each other.
I expect to see most other two-way wireless
devices equipped with Bluetooth, including: cellular phones, two-way pagers, and wireless
data-only terminals. I also expect to see many computer companies build add-in and add-on
modules to enable existing wireless and computing combinations.
Bluetooth is a universal solution to what has
been a perplexing connectivity problem. I am really excited about this technology and what
it will mean to mobile computing and communications. To me, Bluetooth represents a
no-brainer concept at a reasonable price. I believe that any computer or communications
vendor building mobile devices or accessories should embrace this concept and these
products ¡ immediately if not sooner!
Bluetooth has been designed to solve a number of
connectivity problems experienced by mobile workers and consumers. And it does so in a
simple, neat package that is inexpensive--the OEM only pays for the cost of the module.
Bluetooth was well conceived, and I believe that
it will be well received. I will certainly encourage all of my clients to make Bluetooth a
part of their strategy as they move forward. My only disappointment is that I have to wait
until mid-1999 before I can have a Bluetooth-enabled set of mobile computing and
communications devices.