doc.: IEEE 802.15-10-0723-00-0006
September 2010
Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Proposed Resolution of D01 Comment S10-649, Mandatory channel at
UWB low band]
Date Submitted: [XX, September, 2010]
Source: [Huan-Bang Li, Ryuji Kohno] Company [NICT]
Address [3-4 Hikarino-oka, Yokosuka, Kanagawa, Japan]
Voice:[+81 468475104], FAX: [:[+81 468475431], E-Mail:[{lee, kohno}@nict.go.jp]
Re: [Proposed Resolution of D01 Comment S10-649]
Abstract: [propose a resolution to D01 Comment S10-649]
Purpose: [This document is for the UWB comment resolution discussion for TG6 draft D01.]
Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for
discussion and is not binding on the contributing individual(s) or organization(s). The material in this
document is subject to change in form and content after further study. The contributor(s) reserve(s) the right
to add, amend or withdraw material contained herein.
Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE
and may be made publicly available by P802.15.
Submission
Slide 1
H.-B. Li, R. Kohno, NICT
doc.: IEEE 802.15-10-0723-00-0006
September 2010
Proposed Resolution of D0 Comment
S10-649
Mandatory channel at
UWB low band
Huan-Bang Li and Ryuji Kohno
NICT
Submission
Slide 2
H.-B. Li, R. Kohno, NICT
doc.: IEEE 802.15-10-0723-00-0006
September 2010
D0 Comment S10-649
• Original comment:
Is it proper to use channel 2 as mandatory in
low band?
Submission
Slide 3
H.-B. Li, R. Kohno, NICT
doc.: IEEE 802.15-10-0723-00-0006
September 2010
Proposed Resolution(s)
• change to channel 3.
The reason behind using channel 2 as mandatory is that waive of DAA at 4.24.8 GHz (channel 3) was set at the end of 2010. It was considered to have no
advantage to use channel 3 without waive of DAA.
However, Japan is in pre-decision to waive DAA until the end of. Using
channel 3 as mandatory can fully take the advantage and greatly reduce cost
for implementation.
Slide 4
Submission
H.-B. Li, R. Kohno, NICT
doc.: IEEE 802.15-10-0723-00-0006
September 2010
Discussion point (1)
• Channel 3 may ask for additional filtering at
low band to fit for spectral mask.
Submission
Slide 5
H.-B. Li, R. Kohno, NICT
doc.: IEEE 802.15-10-0723-00-0006
September 2010
Discussion point (2)
• LDC: throughput is not high enough
• Implementation: DAA vs. filter for mandatory
• If channel 2 is mandatory, both channel 1 and
channel 3 still need filters.
144.8 MHz
157.6 MHz
1
3.00
Submission
3.25
3.50
2
3.75
3
4.00
4.25
Slide 6
4.50
4.75
5.00
f GHz
H.-B. Li, R. Kohno, NICT
doc.: IEEE 802.15-10-0723-00-0006
September 2010
Discussion point (3)
• Using channel 3 as mandatory is good for
LDC devices in the sense of coexistence with
15.4a, which uses channel 2 as mandatory.
• Using channel 3 as mandatory is good in the
sense of coexistence with 15.4a, If slotted
ALOHA is used.
• Using channel 2 as mandatory is good in the
sense of coexistence with 15.4a,, if CCA is
used.
Submission
Slide 7
H.-B. Li, R. Kohno, NICT
doc.: IEEE 802.15-10-0723-00-0006
September 2010
Conclusion
• Channel 2 vs. channel 3.
• Not against to use channel 2 as mandatory in
the following sense:
– International harmonization
– Reduce the burden of mandatory implementation
Submission
Slide 8
H.-B. Li, R. Kohno, NICT