September 2011doc.: IEEE 802.11-11/1201r0

IEEE P802.11
Wireless LANs

D1.0 Comment Resolution – Extended Power Constraint element
Date: 2011-09-xx
Author(s):
Name / Affiliation / Address / Phone / email
Illsoo Sohn / LG Electronics / LG R&D Complex 533, Hogye-1dong, Dongan-Gu, Anyang-Shi, Kyungki-Do, 431-749, Korea / +82-31-450-1882 /
Yongho Seok / LG Electronics / LG R&D Complex 533, Hogye-1dong, Dongan-Gu, Anyang-Shi, Kyungki-Do, 431-749, Korea / +82-31-450-1947 /

Abstract

This document provides resolutions for the following comments to 11ac spec draft D1.0:

CIDs 2846, 3336, 2853, 3343, 2845, and 3335.

8.4.2.105Extended Power Constraint element

2846 / 8.4.2.105 / 58 / 62 / There's no blurb explaining the use of the length field / Add blurb similar to the one in 8.4.2.104; also clarify in 10.8.3 that an LPC shall be specified for all channel widths supported in the BSS
3336 / 8.4.2.105 / 58 / 62 / There's no blurb explaining the use of the length field / Add blurb similar to the one in 8.4.2.104; also clarify in 10.8.3 that an LPC shall be specified for all channel widths supported in the BSS
Proposed resolution:

Agree in principle. The definition of the Length field needs to be included. See the Editing Instructions below.According to 8.3.3.2 (Beacon frame format) and 8.3.3.10 (Probe Response frame format), the Extended Power Constraint element exists only when a channel width is 80MHz or wider. Thus, no change is required in 10.8.3.

2853 / 8.4.2.105 / 58 / 64 / So there will never be a different LPC for 20 and 40 MHz channel widths? / Clarify
3343 / 8.4.2.105 / 58 / 64 / So there will never be a different LPC for 20 and 40 MHz channel widths? / Clarify
Proposed resolution:

Disagree. According to 22.3.14 (Channelization), the case that local power constraints on 20 and 40MHz can be different never happens.

2845 / 8.4.2.105 / 59 / 4 / What is intended by "(from the MIB)"? / Delete
3335 / 8.4.2.105 / 59 / 4 / What is intended by "(from the MIB)"? / Clarify
Proposed resolution:

Agree. The phase seems not necessary and is deleted.

Editing Instructions

8. Frame formats

8.4 Management frame body components

8.4.2 Information elements

8.4.2.105 Extended Power Constraint element

Editor: Please make the following changein Clause 8.4.2.105

The Extended Power Constraint element determines the local maximum transmit power in each of the operatingfrequency segment. The format of the Power Constraint element is shown in Figure 8-ac19.

The Length field is variable and depends on the number of Channel Width and Local Power Constraint pairs that are included in the element.

The Channel Width field uses the same encoding as the STA Channel Width field of the VHT Operation element(see 8.4.2.141 (VHT Operation element)).(#3334)

The Local Power Constraint field is encoded as an 8-bitunsigned integer in units of decibelsin the range of 0 to 128dB with 0.5dB step. The local maximumtransmit power for a channel is (#3338)defined as the maximum transmit power level specified for the channelin the VHT Transmit Power Envelope element minus the local power constraint specified for the channel(from the MIB) in the Extended Power Constraint element.

The Extended Power Constraint element is included in Beacon frames, as described in 8.3.3.2 (Beaconframe format), and Probe Response frames, as described in 8.3.3.10 (Probe Response frame format).(#3339)

Submissionpage 1Illsoo Sohn, LG Electronics