Bandwidth Indication Design for 120MHz Month Year doc.: IEEE 802.11-yy/xxxxr0 Nov, 2010 Bandwidth Indication Design for 120MHz Date: 2010-11-10 Authors: Liang Peng, China TeleCom John Doe, Some Company

Month Year doc.: IEEE 802.11-yy/xxxxr0 Nov, 2010 Abstract In R3.1.E: The draft specification shall include support for an efficient channelization in China’s (5,725 ~ 5,850 MHz) spectrum. Preamble defined in 992r15 could be extended to indicate 120MHz band width as proposed in this contribution. The corresponding regulatory class is also proposed for Chinese specific 5GHz frequency regulation. Liang Peng, China TeleCom John Doe, Some Company

Nov, 2010 Background In last Hawaii meeting, following statements were accepted: In R3.1.E: The draft specification shall include support for an efficient channelization in China’s (5,725 ~ 5,850 MHz) spectrum. A feasible efficient channelization solution in Chinese 5GHz spectrum is as figured below. Liang Peng, China TeleCom

Nov, 2010 Analysis and Proposal Issue and Challenge to 120MHz bandwidth indication design BW field in VHT-SIG-A to be extended to support 120MHz indication; VHT-SIG-B to be extended to conform 120MHz bandwidth; Extended Regulatory Class for Chinese 120MHz bandwidth. Proposal Use the Reserved bit which is for possible expansion of BW field in VHT-SIG-A to indicate 120MHz bandwidth in Chinese regulatory area; Construct VHT-SIG-B for 120MHz bandwidth, following concurrent methodology; Extend current regulatory class to support Chinese 120MHz bandwidth. Liang Peng, China TeleCom

VHT-SIG-A for 120MHz&160MHz Bandwidth Nov, 2010 VHT-SIG-A for 120MHz&160MHz Bandwidth BW in VHT-SIG-A is defined as 0 for 20 MHz, 1 for 40 MHz, 2 for 80 MHz, 3 for 160MHz , 4 for 120MHz (use Reserved bit which is for possible expansion of BW field); BW Bandwidth 100 20MHz 101 40MHz 110 80MHz 111 160MHz 000 120MHz* 001 Reserved 010 011 *Note ：When Country String indicates , BW is set to 000 for the 120MHz bandwidth in China. Liang Peng, China TeleCom

VHT-SIG-B for 120MHz&160MHz Bandwidth Nov, 2010 VHT-SIG-B for 120MHz&160MHz Bandwidth VHT-SIG-B is currently specified to indicate 20/40/80MHz only in Spec Framework 992r15. It needs to be extended to indicate 120MHz and 160MHz bandwidth. Following current methodology, the VHT-SIG-B for 120MHz and 160MHz bandwidth could be defined as following: Field MU bit allocation SU bit allocation Description Bandwidth (MHz) 20 40 80 120 160 length of useful data in PSDU in units of 4 octets Length 16 17 19 21 MCS 4 - Reserved 3 2 All ones Tail 6 All zeros Total # bits 26 27 29 Liang Peng, China TeleCom

Extended Regulatory Class for Chinese Frequency Regulation Month Year doc.: IEEE 802.11-yy/xxxxr0 Nov, 2010 Extended Regulatory Class for Chinese Frequency Regulation The Regulatory Triplet Need Extension Specific regulatory classes have been defined for frequency regulation of USA, Europe and Japan. To indicate Chinese specific regulation, the triplet of Regulatory Extension Identifier, Regulatory Class and Coverage Class need to be extended for Chinese 120MHz bandwidth. Liang Peng, China TeleCom John Doe, Some Company

Extended Regulatory Class for Chinese Frequency Regulation Nov, 2010 Extended Regulatory Class for Chinese Frequency Regulation Solution: Extend Annex I and J to accommodate Chinese specific regulation requirements. Request STA to set dot11RegulatoryClassesRequired to true when used in China. Define new regulatory triplet for Chinese 5.725~5.850MHz spectrum. Regulatory Extension Identifier above 201 to indicate triplet. New regulatory classes for 20MHz, 40MHz, 80MHz channels with shifted centre frequency. New regulatory class for 120MHz channel. Liang Peng, China TeleCom

Nov, 2010 Thank you! Liang Peng, China TeleCom