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Unified Measurement and Quiet Request Element Design for DFS Compliance

This document introduces a unified element design for measurement and quiet request in DFS networks to comply with regulatory requirements, ensuring reliable transmission with simplified and streamlined processes.

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Unified Measurement and Quiet Request Element Design for DFS Compliance

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  1. Measurement/Quiet Request Element for DFSin TGh A. Soomro and S. Choi PHILIPS[amjad.soomro, sunghyun.choi]@philips.com A. Soomro & S. Choi, Philips

  2. Introduction • Current mechanisms • Measurement Requests in 802.11h/D1.1 • Measurement Interval Frame in 01/532 for IBSS DFS • Issues • Meeting DFS regulatory requirements? • Latency • Multiple frame formats • Proposed Changes • Conclusions A. Soomro & S. Choi, Philips

  3. octets: 1 octets: 1 octets: 1 octets: 1 octets: 6-2300 SpectrumManagement (category 4) ChannelMeasReq (action 0) ActivationDelay DialogToken Channel MeasurementMethod Element octets: 1 octets: 1 octets: 2 octets: n octets: 1 octets: 1 ElementID (37) Length (4+n) MeasurementDuration ChannelNumbers Report Type Report Time Limit The Current Mechanism • The Channel Measurement Request frame • Basic Measurement Method A. Soomro & S. Choi, Philips

  4. octets: n octets: 1 octets: 1 ChannelNumbers Report Type Report Time Limit The Current Mechanism • CF Channel Measurement Method element octets: 1 octets: 1 octets: 2 octets: 1 octets: 1 ElementID (38) Length(6+n) MeasurementDuration MeasurementOffset Non-MeasurementDuration A. Soomro & S. Choi, Philips

  5. Octets:2 2 6 6 2 4 Frame Control Duration RABroadcastAddress BSSID Quiet Period FCS Proposed Measurement Interval Frame(Previous) • Measurement Interval need • To perform ‘clean’ measurements in the current channel • Likely regulatory requirements compliance • To monitor other channels while continuing network operations • Previous proposal in S. Black et. al. (01/532r0a) A. Soomro & S. Choi, Philips

  6. The Issues • Meeting DFS Regulatory requirements? • Expected • Unknown  Flexibility • Latency • Several beacon periods • Channel access • DCF and other known access issues • Multiple formats • NEED: A unified and simplified approach A. Soomro & S. Choi, Philips

  7. ElementID Length Measurement Time Channel List Length Count Offset QuietTime ChannelNumber ... ChannelNumber Octets: 1 1 1 2 2 1 1 1 MeasurementID MeasurementID ... ... 1 1 n n Proposed Single Element • Measurement/Quiet Request Element format ... A. Soomro & S. Choi, Philips

  8. Field Definitions • Count • The number of beacon intervals that this measurement shall be repeated • Offset • The time interval in TUs starting from TBTT after which the STA shall not transmit (and do measurements if indicated). • Quiet Time • The time interval in TUs starting from the end of ‘Offset’ that the STA shall NOT transmit (and do measurements if indicated). A. Soomro & S. Choi, Philips

  9. Field Definition • Measurement/Quiet Time • Count = 0xFF can be reset via another Measurement/Quiet Request frame Count = 0 (Reserved) Count = 1 … 0xFE (Permitted) Count = 0xFF (Forever) Count = 1 Quiet Time Offset TBTT TBTT A. Soomro & S. Choi, Philips

  10. Length Channel Number Channel Number ... Channel Number Channel List Length = 0No measurements with quiet period A. Soomro & S. Choi, Philips

  11. Measurement/Quiet Request Element Usage Examples • For quieting the channel • Set Channel List.Length = 0 • Specify quiet time, Count  0xFF • For quieting the channel and doing measurements • Set Channel List.Length  0 • Specify quiet time, Count  0xFF • For quieting the channel periodically • Set Channel List.Length = 0 • Specify quiet time and Count = 0xFF • For Immediate action • Set Activation Delay = 0 • Activation Delay is part of Action Frame Format including the element A. Soomro & S. Choi, Philips

  12. Conclusions • Single element for measurement and quiet requests • Reliable transmission • Simplified - Unified • Enables meeting regulatory requirements. A. Soomro & S. Choi, Philips

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