1. Proposed US Channelization for IEEE 802.11ah
Month Year
doc.: IEEE yy/xxxxr0
Proposed US Channelization for IEEE ah
Date: January 16, 2012
Authors:
Name
Company
Address
Phone
Shusaku Shimada
Yokogawa Co.
Nakacho
Musashino-shi,
, Japan
Stefan Aust
NEC Communication Systems, Ltd.
1753 Shimonumabe, Nakahara-ku, Kawasaki, Kanagawa , Japan
Mitsuru Iwaoka
Yokogawa Electric Co.
John Doe, Some Company

2. Background
This submission proposes a comprehensive compromise for US channelization to accommodate 1MHz channels.
Numerous proposals have been contributed that suggest different channelization for US 902~928MHz.
The TGah group was somewhat positive about MediaTek’s contribution (DCN1571r1), which utilizes the 1MHz channels from 902 MHz to 912MHz.

3. Motivation
Proposed channelization would increase the simplicity of the ah standard by enabling each possible usecase at same portion of frequency band.
Allocating 918~928MHz to 1MHz Channels would be attractive for a harmonization to enhance the global commonality.
Singapore, Korea, Japan have their 1MHz channels starting from >916MHz
Slide 3

4. Proposal

5. Proposed US Channelization
902
MHz
918
MHz
928
MHz
Proposed
T.B.D. (Usage of 1MHz Channel)
Ch1
Ch10
1 MHz
2 MHz 1 2 3 4 5 6 7 8 9 10 11 12 13
4 MHz 1 2 3 4 5 6 1 2 3
8 MHz
16 MHz 1
T.B.D.
(e.g. Either or Both
MCS0-rep2 1MHz
MCS0 2MHz
Beacon)
MCS0-rep2-1MHz
Beacon
Slide 5

6. Straw poll Do you agree …
IEEE802.11ah Task Group allocates 1MHz bandwidth channels side by side from 918MHz up to 928MHz for US 902~928MHz ISM band.
Yes No
Abstain

7. Backup slides

8. Singapore: Japan: Korea: US: 925 MHz 1 MHz Ch 1 Ch 5 920 MHz 902 MHz3 4
2 MHz
4 MHz
8 MHz 5 6 7 8 9 10 11 12 13
16 MHz
Ch 1
Ch 10
918 MHz
Singapore:
927.5 MHz
1 MHz
Ch 1
Ch 11
916.5 MHz
Japan:
1 MHz
Korea:
2 MHz
4 MHz
917.5 MHz
923.5 MHz
US:
Slide 8

9. References
[1] DCN 1329r1, “Motions and Strawpoll on Channelization for 11ah ”,
[2] DCN 1535r0, “US Channelization”,
[3] DCN 1571r1, “US Channelization and Bandwidth Considerations for ah”,
[4] DCN 1516r0, “802.11ah Channelization Proposal for US”,
[5] DCN 1318r0, “Japanese Channelization for ah ”,
[6] DCN 1133r0, “Singapore Sub 1GHz Frequency Bands for IEEE ah ”,
[7] DCN 1422r0, “11ah Channelization of Korea”, November 7, 2011

10. Background Indoor coverage of 1MHz BSS over 2MHz BSS.
Assumption: Distance exponent of Path Loss=36.7, Sensitivity improvement=6dB
Outdoor coverage of 1MHz BSS over 2MHz BSS.
Assumption: Distance exponent of Path Loss=37.6, Sensitivity improvement=6dB
Battery current constrained maximum Tx Power 　 PTx (i.e. power per sub-carrier) R
Area2/Area1=1.1
Area1,Covered by MCS0,2MHz
Area2,Covered by MCS0-Rep2,1MHz
1.45 R R
Area2/Area1=2.0
Area1,Covered by MCS0,2MHz
Area2,Covered by MCS0-Rep2,1MHz
1.74 R
Slide 10

11. End
Slide 11