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

2. Month Year
doc.: IEEE 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

3. 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

4. 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

5. 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

6. 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

7. Extended Regulatory Class for Chinese Frequency Regulation
Month Year
doc.: IEEE 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

8. 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

9. Nov, 2010
Thank you!
Liang Peng, China TeleCom