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DMG Base MCS and Length Supplementary Slides

DMG Base MCS and Length Supplementary Slides. Authors:. Date: 2016-05-17. Abstract. The current text in draft D5.3 of REVmc defines the Base MCS and Length field in the PHY SC header for extended MCS.

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DMG Base MCS and Length Supplementary Slides

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  1. Hiroyuki Motozuka, Panasonic DMG Base MCS and LengthSupplementary Slides Authors: • Date: 2016-05-17

  2. Hiroyuki Motozuka, Panasonic Abstract • The current text in draft D5.3 of REVmc defines the Base MCS and Length field in the PHY SC header for extended MCS. • But the formula for Length field value causes duration calculation error for some Ns (number of PSDU octets.) • The submission 11-16/0670r2 proposes modified text to fix it. • This submission includes supplementary slides for 11-16/0670r2.

  3. Hiroyuki Motozuka, Panasonic duration calculation error • STAs without Extended SC MCS support miscalculate the PPDU duration for some Ns (number of octets). • Such error may cause potential risks for fairness and interoperability on backoff procedures. Actual MCS Actual PPDU duration MCS9.1 N = 70 Preamble/Header Payload 3.09 usec Header value (Spoofed) Calculated PPDU duration MCS6 Length 40 Preamble/Header Payload 2.80 usec +0.29 usec formula on REVmc D5.3 duration error -0.58us ~ 0.29us

  4. Hiroyuki Motozuka, Panasonic Proposed Modification - MCS • MCS 6 to 12 are used for spoofingin natural (ascending) order

  5. Hiroyuki Motozuka, Panasonic Proposed Modification - Length • Based on number of symbol blocks • Avoid error caused by number of parity bits

  6. Hiroyuki Motozuka, Panasonic Proposed Modification - SI • Additional information to recover actual number of octets in PPDU is transmitted with 2bits of SI (Similar to [2] 11-16/0220r3)

  7. Hiroyuki Motozuka, Panasonic References • [1] Draft P802.11REVmc_D5.3 • [2] 11-16/0220r3 Clause 20 SC MCS Extension • [3] 11-16/0233r0 Additional SC MCSs in clause 20 (DMG PHY) • [4] 11-16/0670r2 Base MCS and Length Calculation for Extended MCS Set

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