`
`FEATURE
`Sidebar: The Battle for 11n
`By Russell Kay
`
`Contributing Writer, Computerworld
`MAR 13, 2006 12:00 AM PST
`
`When we talk of the IEEE's forthcoming 802.11n standard for high-speed (200Mbit/sec.
`
`and up) wireless networks, it's important to note that we're not yet sure what technology
`
`it will encompass. Currently, two groups are pushing different approaches. One
`
`consortium is the World Wide Spectrum Efficiency (WWiSE), and the other has the rather
`
`odd name of TGn Sync (short for Task Group N of the IEEE 802.11 Working Group). First
`
`proposals were made in 2004, and there is little hope for agreement before this summer.
`
`TGn Sync is a group of more than 25 companies across cellular, computing, consumer
`
`electronics, enterprise networking, mobile radio, public access and semiconductor
`
`markets. It is spearheaded by Agere Systems Inc., Atheros Communications Inc., Intel
`
`Corp., Nokia Corp, Philips Electronics NV and Sony Corp. The TGn Sync proposal expects
`
`to deliver speeds of around 313Mbit/sec. using two antennas and 40-MHz channels.
`
`WWiSE is led by MIMO pioneer Airgo Networks Inc., with other wireless chip-set
`
`manufacturers, including Broadcom Corp., Conexant Systems Inc., STMicroelectronics
`
`NV and Texas Instruments Inc. The WWiSE proposal requires only a 20-MHz channel
`
`(which the group believes is friendlier to all countries) and provides better efficiency.
`
`Speeds would start at 135Mbit/sec., with two transmitting antennas mandatory. More
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`antennas would be optional, as would a 40-MHz mode, and these could drive data rates
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`up to 540Mbit/sec.
`
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`Currently, TGn Sync's proposal has more proponents but still not enough support for a
`
`final decision. In the end, whichever proposal can win 75% of the vote will determine the
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`standard. Best guess is that an 802.11n specification will be published in 2007.
`
`Copyright © 2006 IDG Communications, Inc.
`
`DELL-1035
`10,079,707
`
`
`
` UNITED STATES
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