The IT industry is really the marriage of
telecommunications and data systems. Telecommunications required computers
and computers required new systems for communicating among each other.
There was so much overlap that it became almost impossible to distinguish
between the two.
When IT markets first began to expand, users became
concerned that the equipment and systems they were purchasing could not
interconnect or interoperate. The consumer was not satisfied -- and
dissatisfied consumers do not buy more products. By simply not purchasing
new equipment (at least until they were assured that interoperability was
possible) the users forced technical harmonization (standards) through
economic motivation (sales).
Today, just about everything associated with
a computer, especially those connected to the Internet, is based on an
industry standard. But the business of standards in the IT industry has
been changing over the past few years, fed mostly by shorter product life
cycles and the insatiable desire of vendors to develop new technologies
that interact with existing infrastructures. This principle holds true for
wireless local area networks (WLANs).
In January, an industry analyst
reported that, “Wireless is one of the more attractive incentives to
upgrade in 2003.” The resulting competition for consumer dollars has led
multiple vendors to launch separate, and sometimes conflicting,
technologies that have their own characteristics, strengths and
weaknesses. Now, industry experts worry that some manufacturers of
wireless products are moving too hastily ahead of standards development.
SETTING THE STANDARD
Standards may be defined as “recognized units of
comparison by which the correctness of others can be determined” or “a
set of characteristics or quantities that describes features of a product,
process, or service.” Regardless of the definition, standards are tools
that can help end users comparison-shop by emphasizing factors of
importance -- usually features, functions and price -- and heighten
confidence in terms of performance, safety, reliability, and overall
quality.
When a market has not made up its mind on a particular technology
option, or when economic, legal, political or cultural considerations come
into play, competing standards may arise. Much like competing products, a
market leader will usually become apparent. If multiple technical
solutions remain, the standard will typically focus on mechanisms to
ensure interoperability, thereby leading to a win-win solution for all
parties.
The American National Standards Institute (ANSI) has served as coordinator of the U.S. voluntary consensus standards system
since 1918 and is a world leader in its support of the concept that market
forces should dictate the timing, content requirements, and number of
standards to be developed. The Institute does not itself develop
standards; rather, ANSI accredits standards-setting organizations to
create and maintain documents within a particular area of work. Standards
approved by ANSI are the only documents that may be designated as “American
National Standards (ANS).”
ANSI-accredited developers certify that they
will adhere to a set of standards-setting procedures that call for
openness, balance, due process and a consensus agreement of materially
affected and interested parties. In almost all cases, the development work
includes representatives of both the private and public sectors. While
consortia standards may also offer a consensus-based solution to a
problem, participation on the “problem-solving team” is usually
limited to members of the consortia -- a membership that often requires a
substantial financial contribution. Thus, consortia are often referred to
as “non-traditional” standards developers.
The Institute of Electrical
and Electronics Engineers (IEEE) is one of the nearly 200
ANSI-accredited standards developers. A globally-recognized leader in the
development of standards for the IT industry, IEEE’s work program
includes the LAN/MAN Standards Committee that has been extremely
successful in its development of Local Area Network standards and
Metropolitan Area Network standards. The most widely used of these
standards are for the Ethernet family, Token Ring, Wireless LAN, Bridging
and Virtual Bridged LANs. An IEEE working group developed the family of
802.11 standards, commonly know as Wi-Fi (Wireless Fidelity).
802.11
OVERVIEW
The complete title of the base American National Standard (IEEE
802.11-1999) is Standard for Information Technology - Telecommunications
and information exchange between systems - Local and Metropolitan networks
- Specific requirements - Part 11: Wireless LAN Medium Access Control
(MAC) and Physical Layer (PHY) specifications. Its two supplements --
which were also approved as ANS -- specify operation in different radio
frequencies. These documents are commonly known by their designations:
IEEE 802.11b is a standard for WLANs operating in the 2.4 GHz spectrum
with a bandwidth of 11 Mbps, and is the most widely used by consumers
right now. IEEE 802.11a, the other standard for wireless LANs, runs on 12
channels in the less-crowded 5 GHz spectrum. IEEE 802.11a transfers data
up to five times faster than IEEE 802.11b, improving quality of streaming
media with increased bandwidth for big files (54 Mbps).
Millions of people
and businesses have already installed 802.11b networks. The standard is
the only one deployed for public short-range networks, such as those found
at airports, hotels, conference centers, and coffee shops and restaurants.
However, because the 802.11b standard guides devices that operate in an
unlicensed radio band and transmit data on the same frequency as some
household appliances, a user may find interference while surfing the Web
and using a microwave or cordless phone nearby. The 802.11a standard
operates in the 5 GHz frequency, solving the interference problem and
better security, but its range is more limited. The 802.11a technology is
incompatible with the 802.11b networks.
While not yet finalized, the IEEE
working group is creating a new supplement to provide performance
comparable to the 54 Mbps of 802.11a while maintaining compatibility with
802.11b. The document, known as IEEE 802.11g, follows the rule of “lowest
common denominator.” That is, devices compliant with the proposed
standard will also communicate with 802.11b devices -- but they will
operate at the 2.4 GHz frequency. This backwards compatibility, though
slower, is intended to protect the user’s investment in existing
hardware and introduces a higher degree of security. While the IEEE
committee is still working to ratify this standard, some manufacturers are
already shipping products based on the latest (draft) version of the
specification.
As technology and Wi-Fi standards development surges
forward, it is clear that products will need to be delivered in various
combinations of compatibility for the greatest degree of interoperability.
GLOBALLY RELEVANT
ANSI’s goal is to help the standards community promote
internationally recognized, technically valid standards that will provide
end users with products that work together, enhance compatibility, and
converge on future architectures and technologies.
By working through
ANSI, the official U.S. representative to the International Organization
for Standardization (ISO and the International
Electrotechnical Commission (IEC), IEEE technical experts are
actively participating in an ISO/IEC joint technical committee on
information technology. This group is working to confirm a single set of
Wi-Fi standards that meet market needs in global, rather than simply
regional or local, venues. Many of the IEEE’s 802-series standards --
including several in the 802.11 family -- have already been approved for
global implementation.
Which vendors will be the first to offer new
products complying with the latest Wi-Fi technology? What will be the
impact on the end-users of the new, or previously installed technology?
Only time will tell. But one thing is certain…Vendors and users who sit
at the table where the standards are set have the most influence. And the
long-term advantage.
For more information about participation in ANSI,
IEEE or the U.S. standards-setting process, please contact the author,
Stacy Leistner, ANSI director of communications and public relations, at
[email protected].
|