-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 11as far apart as you can get. The result: Both networks saw significant performance degradationas low as 1.2Mbpssimply 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. ""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 transmissionwhich 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.
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 failingwhich would have been the result regardless of what 802.11g chips or modes had been enabled, according to D-Link.