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By Jim Louderback  |  Posted 2003-11-20 Print this article Print
 
 
 
 
 
 
 


-Links Test Results"> Morse and his team, along with engineers from Atheros, have been frantically testing many different configurations since the allegations came out late last week. And he claims that Broadcoms test is fundamentally flawed. The company replicated Broadcoms test, but by putting two totally separate Broadcom-based wireless networks side by side, running in standard G mode. The first network was communicating on Channel 1, the second on Channel 11—as far apart as you can get. The result: Both networks saw significant performance degradation—as low as 1.2Mbps—simply because they were right next to each other. TurboG or not, claims Morse, if you put two wireless networks next to each other, "the electromagnetic fields in the fabric of space are just saying, Wow, too much. "
Or to translate his LA-speak, stick any two wireless nets next to each other, and the close proximity will slam the performance of both. Remember that Broadcom showed DivX movies encoded at 2Mbps failing—which would have been the result regardless of what 802.11g chips or modes had been enabled, according to D-Link.
"That is a ridiculous statement," counters Broadcoms Cohen, rejecting D-Links test results as impossible to achieve under the 802.11g spec. Morse also pointed out that Atheros based products achieve their performance boosts through three additional schemes apart from channel bonding:
  • Packet Bursting: Sending more packets during a particular time than the 802.11g spec allows, by reducing the wait time between packets.
  • Compression: Dynamically compressing packets before transmission—which wont add much benefit for already compressed music and video files.
  • Fast Frames: Squeezing more data into each frame According to D-Link, channel bonding can be separately turned on or off by the user. And even when channel bonding has been selected, it can be implemented as a solution of last resort. In "Dynamic Turbo" mode, channel bonding stays off until the network needs more performance than delivered by the other three schemes -- although actual implementations differ in how they implement this dynamic mode. Next page: Why Jim thinks all wireless vendors are guilty.


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    With more than 20 years experience in consulting, technology, computers and media, Jim Louderback has pioneered many significant new innovations.

    While building computer systems for Fortune 100 companies in the '80s, Jim developed innovative client-server computing models, implementing some of the first successful LAN-based client-server systems. He also created a highly successful iterative development methodology uniquely suited to this new systems architecture.

    As Lab Director at PC Week, Jim developed and refined the product review as an essential news story. He expanded the lab to California, and created significant competitive advantage for the leading IT weekly.

    When he became editor-in-chief of Windows Sources in 1995, he inherited a magazine teetering on the brink of failure. In six short months, he turned the publication into a money-maker, by refocusing it entirely on the new Windows 95. Newsstand sales tripled, and his magazine won industry awards for excellence of design and content.

    In 1997, Jim launched TechTV's content, creating and nurturing a highly successful mix of help, product information, news and entertainment. He appeared in numerous segments on the network, and hosted the enormously popular Fresh Gear show for three years.

    In 1999, he developed the 'Best of CES' awards program in partnership with CEA, the parent company of the CES trade show. This innovative program, where new products were judged directly on the trade show floor, was a resounding success, and continues today.

    In 2000, Jim began developing, a daily, live, 8 hour TechTV news program called TechLive. Called 'the CNBC of Technology,' TechLive delivered a daily day-long dose of market news, product information, technology reporting and CEO interviews. After its highly successful launch in April of 2001, Jim managed the entire organization, along with setting editorial direction for the balance of TechTV.

    In the summer or 2002, Jim joined Ziff Davis Media to be Editor-In-Chief and Vice President of Media Properties, including ExtremeTech.com, Microsoft Watch, and the websites for PC Magazine, eWeek and ZDM's gaming publications.

     
     
     
     
     
     
     

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