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Doc.: IEEE 802.11-00/418 Submission November 2000 Niels Van Erven, 3ComSlide 1 Suggested Approach for 22 Mbps 802.11b Implementation Niels Van Erven 3Com.

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Presentation on theme: "Doc.: IEEE 802.11-00/418 Submission November 2000 Niels Van Erven, 3ComSlide 1 Suggested Approach for 22 Mbps 802.11b Implementation Niels Van Erven 3Com."— Presentation transcript:

1 doc.: IEEE 802.11-00/418 Submission November 2000 Niels Van Erven, 3ComSlide 1 Suggested Approach for 22 Mbps 802.11b Implementation Niels Van Erven 3Com Corporation November 2000

2 doc.: IEEE 802.11-00/418 Submission November 2000 Niels Van Erven, 3ComSlide 2 Overview Recommends an approach to 802.11b using QPSK @ 11Msps Technical Summary Benefits Issues Summary

3 doc.: IEEE 802.11-00/418 Submission November 2000 Niels Van Erven, 3ComSlide 3 Technical Summary QPSK No special coding 11 Msps (22 Mbps theoretical) Backward-compatibility with existing 802.11b Interoperable with 802.11b Use common preambles Logical extension to the current market

4 doc.: IEEE 802.11-00/418 Submission November 2000 Niels Van Erven, 3ComSlide 4 Technical Summary (2) Minimal MAC changes Minor state machine changes Some critical firmware timing issues Increased processing speed Same interference characteristics as encountered in 802.11b products Typical QPSK characteristics Spectral Adjacent channel interference Co-channel interference RF PA backoff from 1dB compression point

5 doc.: IEEE 802.11-00/418 Submission November 2000 Niels Van Erven, 3ComSlide 5 Technical Summary (3) Complexity similar to 802.11b Increased processing speed No increased gate count Elimination / bypassing of correlators Equivalent RF/IF PHY complexity Simplified equalizer possible due to decreased range Throughput almost double 802.11b slightly less in order to accommodate interoperability issues (preambles, etc)

6 doc.: IEEE 802.11-00/418 Submission November 2000 Niels Van Erven, 3ComSlide 6 Benefits Minimal regulatory impact Best coexistence strategy Fastest time-to-market Mature technology Allows industry to leverage existing research and investment Builds on existing customer confidence Minimizes market confusion while providing differentiation Will not be an anticipatory drag on the 802.11b market

7 doc.: IEEE 802.11-00/418 Submission November 2000 Niels Van Erven, 3ComSlide 7 Issues Reduced range Common problem for all approaches Sufficient for home use Increased deployment of access points in business environments Potential for less interference when widely deployed Increased processing power Common problem for all approaches Streaming video will introduce higher utilization rates - interference

8 doc.: IEEE 802.11-00/418 Submission November 2000 Niels Van Erven, 3ComSlide 8 Summary Best compromise for technology, regulatory, industry and customer needs Minimal regulatory impact Best coexistence strategy with all 2.4GHz users Fastest time-to-market Meets burgeoning customer need for speed Mature technology Level playing field for industry participants Lowest risk/investment for best return

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