Channel Selection and Management for 11ac July 2010 doc.: IEEE 802.11-10/0781r0 July 2010 Channel Selection and Management for 11ac Date: 2010-07-13 Authors: Yujin Noh, LG Electronics Yujin Noh, LG Electronics

July 2010 Abstract 80MHz channelization based on non-overlapping channel allocation Behavior limits for 80MHz channelization Operating Classes for 80MHz channelization Considering scanning rule of the primary channel and secondary channel for 80MH channel bandwidth Yujin Noh, LG Electronics

Background Support up to 80MHz channel bandwidth for 11ac July 2010 Background Support up to 80MHz channel bandwidth for 11ac The primary channel can be allowed to be set to any 20MHz subchannel over 80MHz channel bandwidth for some 11ac configurations CSMA/CA approach for the primary channel The rest of subchannels have been idle for at least a PIFS interval prior to the expiry of backoff counter Yujin Noh, LG Electronics

July 2010 Motivation 5 Coexistence (0992r11) R5.C:The Primary Channel may be designated to any 20MHz subchannel over 80MHz channel bandwidth, where Primary Channel designation is subject to co-existence(OBSS) rules yet to be defined. 80MHz channelization is clear for the non-overlapping channel allocation Necessity to be defined for operating classes including the Channel sets and the behavior limits sets Necessity to be defined for Overlapping rule of the primary channel and secondary channel as the first step Yujin Noh, LG Electronics

Channel Allocation for 11ac 40MHz July 2010 Channel Allocation for 11ac 40MHz 40MHz operation based on two adjacent 20MHz channels in the same way of 11n The position of the primary/secondary channels has patterns The permissible 40MHz channel allocation options are defined in terms of the designated primary/secondary channel Non-overlapping channel allocation for each 40MHz channel Refer to behavior limits sets 13 and 14 PrimaryChannelLowerBehavior and PrimaryChannelUpperBehavior Yujin Noh, LG Electronics

Channel Allocation for 11ac 80MHz July 2010 doc.: IEEE 802.11-10/0781r0 July 2010 Channel Allocation for 11ac 80MHz 80MHz operation with four 20MHz subchannels in a row Non-overlapping channel allocation in 5GHz band Simple extension from 40MHz channel allocation The available number of 80MHz channel 5.15-5.35 GHz 5.47-5.725 GHz 5.725-5.845 GHz Non-overlapping 2 1 Yujin Noh, LG Electronics Yujin Noh, LG Electronics

Definition of 11ac BSS and VHT AP for 80MHz July 2010 Definition of 11ac BSS and VHT AP for 80MHz 20/40/80 MHz BSS A BSS in which the supported channel width of the access point (AP) or independent BSS (IBSS) dynamic frequency selection (DFS) owner (IDO) station (STA) is 20 MHz, 40 MHz and 80MHz (Channel Width field is set to TBD) and secondary channel, tertiary channel and quaternary channel field indication is TBD Indication field for secondary channel, tertiary channel and quaternary channel field will be defined 80 MHz capable (EC) VHT AP An VHT AP that included a value of TBD in the Supported Channel Width Set subfield (indicating its capability to operate on a 80 MHz channel) of its most recent transmission of a frame containing an VHT Capabilities element Yujin Noh, LG Electronics

Behavior limits for 80MHz channelization July 2010 doc.: IEEE 802.11-10/0781r0 July 2010 Behavior limits for 80MHz channelization PrimaryChannelLower_80_Behavior 20/40/80 MHz BSS primary channel with secondary channel above the primary channel or 20 MHz BSS primary channel operated by an EC VHT AP and also 20 MHz operational channel for a non-AP STA when the non-AP STA is associated with an EC VHT AP or 20/40 MHz BSS primary channel operated by an EC VHT AP and also 20/40 MHz operational channel for a non-AP STA when the non-AP STA is associated with an EC VHT AP This behavior limit is for the location of the secondary channel relative to the primary channel Yujin Noh, LG Electronics Yujin Noh, LG Electronics

Behavior limits for 80MHz channelization July 2010 Behavior limits for 80MHz channelization PrimaryChannelUpper_80_Behavior 20/40/80 MHz BSS primary channel with secondary channel below the primary channel or 20 MHz BSS primary channel operated by an EC VHT AP and also 20 MHz operational channel for a non-AP STA when the non-AP STA is associated with an EC VHT AP or 20/40 MHz BSS primary channel operated by an EC VHT AP and also 20/40 MHz operational channel for a non-AP STA when the non-AP STA is associated with an EC VHT AP This behavior limit is for the location of the secondary channel relative to the primary channel Yujin Noh, LG Electronics

Behavior limits for 80MHz channelization July 2010 Behavior limits for 80MHz channelization P_S_ChannelsLowerBehavior 20/40/80MHz BSS 40MHz channel with tertiary channel and quaternary channel above the 40MHz channel including primary channel and secondary channel 40MHz channel including primary channel and secondary channel is ruled by 11n This behavior limit is for the location of the tertiary channel and the quaternary channel relative to the 40MHz channel including the primary channel and the secondary channel Yujin Noh, LG Electronics

Behavior limits for 80MHz channelization July 2010 Behavior limits for 80MHz channelization P_S_ChannelsUpperBehavior 20/40/80MHz BSS 40MHz channel with tertiary channel and quaternary channel below the 40MHz channel including primary channel and secondary channel 40MHz channel including primary channel and secondary channel is ruled by 11n This behavior limit is for the location of the tertiary channel and the quaternary channel relative to the 40MHz channel including the primary channel and the secondary channel Yujin Noh, LG Electronics

Operating Classes for 80MHz channelization July 2010 Operating Classes for 80MHz channelization Refer to the example operating classes in the attached supplement document For operating classes for 80MHz channelization, combination of two behavior limits can be used Location of the secondary channel relative to the primary channel Location of the 40MHz channel including the tertiary channel and the quaternary channel relative to the 40MHz channel including the primary channel and the secondary channel Example of 80MHz channel bandwidth with behavior limits of PrimaryChannelLower_80_Behavior and P_S_ChannelsLowerBehavior Yujin Noh, LG Electronics

Scanning rule for 80MH channel bandwidth (1/3) July 2010 Scanning rule for 80MH channel bandwidth (1/3) Overlapping rule of the primary channel and secondary channel Some parts of overlapping rule of 11ac can follow the scanning requirement of 11n Scanning requirement of 11n has considered the fairness fully between the existing BSS and the new BSS 11n products work well with less complexity so far. It will be useful that the fairness aspect is kept considering up to 80MHz channel bandwidth for 11ac In that sense, the 11ac scanning rule with the primary channel and the secondary channel between the new BSS and the existing BSS can be aligned with the 11n scanning rule Yujin Noh, LG Electronics

Scanning rule for 80MH channel bandwidth (2/3) July 2010 Scanning rule for 80MH channel bandwidth (2/3) The rest parts of overlapping rule are ambiguous because of introduction of the tertiary channel and quaternary channel Considering the widen channel bandwidth for 11ac, it is needed to discuss how the scanning requirement will be supported in an efficient and simple way Yujin Noh, LG Electronics

Scanning rule for 80MH channel bandwidth (3/3) July 2010 Scanning rule for 80MH channel bandwidth (3/3) Alignment of the primary channels and secondary channels between the existing BSS and new BSS based on the 11n scanning requirement can be considered as the first step for 11ac Even though the primary channel and the secondary channel follow the 11n scanning requirement, the rest parts of overlapping rule are ambiguous because of introduction of the tertiary channel and quaternary channel Scanning requirement between the primary/secondary channel s of the new BSS and the tertiary/quaternary channels of the existing BSS is TBD Yujin Noh, LG Electronics

Summary Non-overlapping 80MHz channel allocation July 2010 Summary Non-overlapping 80MHz channel allocation This document shows the description of operating classes that include the Channel sets and the behavior limits as one of examples Operating classes can be generalized and modified to fit in the non-overlapping 80MHz channel allocation Alignment of the primary channels and secondary channels between the existing BSS and new BSS based on the 11n scanning requirement can be considered as the first step for 11ac Yujin Noh, LG Electronics