September, 2011 doc.:IEEE 802.11-10/1312r1

IEEE P802.11 Wireless LANs

TLV modification for MAC CSM

Date: 2011-09-19

Author(s): Name Company Address Phone Email Zhou Lan NICT 3-4, Hikarino-oka, Yokosuka, +81 45 847 [email protected] Kanagawa, Japan, 239-0847 5062 Chen Sun NICT 3-4, Hikarino-oka, Yokosuka, [email protected] Kanagawa, Japan, 239-0847 Yohannes NICT 3-4, Hikarino-oka, Yokosuka, [email protected] Alemseged Kanagawa, Japan, 239-0847 Hiroshi Harada NICT 3-4, Hikarino-oka, Yokosuka, [email protected] Kanagawa, Japan, 239-0847

Abstract

This document contains proposed resolution of some of the comments categorized as MAC CSM in LB171 of P802.11af D1.0, shown in 802.11-11/0277r16. Proposed resolutions are based on 802.11af draft text D1.03.

This submission provides resolutions for comment CID 328, 515,

Submission page 1 Zhou Lan September, 2011 doc.:IEEE 802.11-10/1312r1

Interpretation of a Motion to Adopt A motion to approve this submission means that the editing instructions and any changed or added material are actioned in the TGaf Draft. This introduction is not part of the adopted material.

Editing instructions formatted like this are intended to be copied into the TGaf Draft (i.e. they are instructions to the 802.11 editor on how to merge the text with the baseline documents).

TGaf Editor: Editing instructions preceded by “TGaf Editor” are instructions to the TGaf editor to modify existing material in the TGaf draft. As a result of adopting the changes, the TGaf editor will execute the instructions rather than copy them to the TGaf Draft.

Submission Note: Notes to the reader of this submission are not part of the motion to adopt. These notes are there to clarify or provide context.

MAC CSM related comments

CID Page Clause Comment Proposed Change 515 132.06 E.2.4.1 The format for carrying the channel as per the comment schedule information does not require to have starting UTC time for each channel. Since, the schedule information for 48 hours will be required, offset time from the start, together with durations of availability should be more efficient. 328 136.00 E.3.1.4 The format for carrying the channel See comment - make it more schedule information does not require to applicable and simple have starting UTC time for each channel. Since, the schedule information for 48 hours will be required, offset time from the start, together with durations of availability should be more efficient. Discussions: The comments ask for optimization of the Channel Schedule Descriptor TLV to reduce the overhead. The Channel Schedule Descriptor TLV is designed as a compound TLV, the element inside will be present only when it is needed. The Channel Availability Starting Time is present only when the RLSS is able to provide such information, therefore overhead is not an issue. On the other hand, it is likely that the channel becomes available after a while that the response TLV is received. It would be helpful to have a field to indicate the offset of time that the channel becomes available with respect to the time that the response TLV is received.

Propose: Accepted to CID 328, 515, per discussions and editing instructions in this document 802.11- 11/1312r0.

Editing instructions:

TGaf Editor: Change Table 8-14h Channel Schedule Descriptor value field Type fields as follows:

Submission page 2 Zhou Lan September, 2011 doc.:IEEE 802.11-10/1312r1

SubtType Length Name Value Scope (1 octet) (octets)

Operating Class 1 1 The Operating Class field is set to the number RLSS_CSM, (optional) of the operating class of the channel, which is US defined in Annex Error: Reference source not found.

Channel Number 2 1 The Channel Number field is set to the number RLSS_CSM, of the channel, which is subject to the value of US Channel Schedule Management Mode field. If the Channel Schedule Management Mode field indicates the schedule information is based on WLAN channel, the channel number is a channel from the STA's operating class as defined in Annex Error: Reference source not found; otherwise, the Operating Class compound TLV will not be present and the Channel Number is a positive integer value as defined in Annex Error: Reference source not found to indicate the available TV channel for WLAN operation.

Channel 3 8 The Channel Availability Starting Time field RLSS_CSM, Availability indicates the starting time in Coordinated US Starting Time Universal Time (UTC) from when the channel (optional) indicated in the Channel Number field is available for operation. When this field is not present, the station will take the time that the response elementTLV is received as the starting time of the channel availability.

Channel 4 2 The Channel Availability Offset Time field CSM Availability indicates the offset of channel availability time Offset Time with respect to the time that the Channel Schedule Descriptor is received. This field is present when the Channel Availability Starting Time field is not present in the response TLV and the channel is not available yet at the moment the TLV is received.

Channel 5 2 The Channel Availability Duration field RLSS_CSM, Availability indicates the duration in minutes of the US Duration availability of the channel that indicated in the Channel Number field.

Submission page 3 Zhou Lan