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Doc.: IEEE 802.11-00/39 Submission March 2000 Keith Amann, SpectraLink CorporationSlide 1 802.11 MAC Enhancements: Additional Requirements Considerations.

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Presentation on theme: "Doc.: IEEE 802.11-00/39 Submission March 2000 Keith Amann, SpectraLink CorporationSlide 1 802.11 MAC Enhancements: Additional Requirements Considerations."— Presentation transcript:

1 doc.: IEEE 802.11-00/39 Submission March 2000 Keith Amann, SpectraLink CorporationSlide 1 802.11 MAC Enhancements: Additional Requirements Considerations Keith Amann, SpectraLink Corporation

2 doc.: IEEE 802.11-00/39 Submission March 2000 Keith Amann, SpectraLink CorporationSlide 2 802.11 MAC Enhancements: QoS Functional Considerations Support variations in packet rates/sizes –VOX –Transmission Bit Rate Variations –Variations in stream content(?)

3 doc.: IEEE 802.11-00/39 Submission March 2000 Keith Amann, SpectraLink CorporationSlide 3 802.11 MAC Enhancements: QoS Functional Considerations Support of Latency Limitations among different STAs, as well as different streams for a STA –Useless stream data consumes valuable bandwidth – The usefulness of delayed stream data will vary from application to application and depend upon the size of the jitter buffer in use Support for different QoS requirements from the same STA on a per stream basis –H.323 session concurrently with FTP –Multimedia Clients

4 doc.: IEEE 802.11-00/39 Submission March 2000 Keith Amann, SpectraLink CorporationSlide 4 802.11 MAC Enhancements: QoS Functional Considerations Compatibility with Wireless Bridge/Repeater Environments –Bridges can be communicating with other STAs as well as remote bridges –Repeaters introduce additional complexity into the latency and loading equations

5 doc.: IEEE 802.11-00/39 Submission March 2000 Keith Amann, SpectraLink CorporationSlide 5 802.11 MAC Enhancements: Other Functional Considerations Attempt to minimize the Hidden Node problem –Overlapping BSSes intersect in the problem space with the Hidden Node problem, but it is not the same issue

6 doc.: IEEE 802.11-00/39 Submission March 2000 Keith Amann, SpectraLink CorporationSlide 6 802.11 MAC Enhancements: Performance Considerations QoS –Voice missing rates from 16-32 kbps –Voice Maximum Delay requirements although admirable, seem unrealistic Bandwidth Efficiency –Is a particular technique more efficient than another? –Does a particular solution scale well? As required bandwidth increases does it help or hinder?

7 doc.: IEEE 802.11-00/39 Submission March 2000 Keith Amann, SpectraLink CorporationSlide 7 802.11 MAC Enhancements: Performance Considerations Bandwidth Reservation –Predetermined Usage Information –Available BEFORE failure occurs

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