Transcript · Presented the updated “Channel Measurement for IEEE 802.11aj (45GHz)” 11-12/1361r3

April 2013
doc.: IEEE 802.11-13/0175r2
Backward Compatibility Feature for
802.11aj
Date: 2013-04-24
Presenter:
Name
Company
Xiaoming Peng
Institute for
1 Fusionopolis Way, 65-6408Infocomm
#21-01 Connexis,
2429
Research (I2R) / Singapore
CWPAN
Submission
Address
Slide 1
Phone
email
[email protected]
Xiaoming Peng
April 2013
doc.: IEEE 802.11-13/0175r2
Author List
Submission
Name
Company
Address
CHEN Qian
I2R / CWPAN
CHEN Jiamin
Huawei /CWPAN
CHIN Francois
I2R /CWPAN
GAO Bo
Tsinghua /CWPAN
HAO Peng
JUST /CWPAN
HONG Wei
SEU /CWPAN
LI Zhiqiang
IMECAS /CWPAN
LIU Zongru
LIU Pei
Hangzhou
Millimeter Wave
/CWPAN
Hisilicon /CWPAN
LU Su
Huawei /CWPAN
PENG Xiaoming
I2R/CWPAN
PNG Khiam Boon
I2R /CWPAN
SUN Bo
ZTE /CWPAN
WANG Haiming
SEU /CWPAN
YUE Guangrong
UESTC/CWPAN
ZHUO Lan
CESI/CWPAN
ZOU Ning
Intel/CWPAN
ZOU Weixia
BUPT/CWPAN
Slide 2
Phone
email
Xiaoming Peng
April 2013
doc.: IEEE 802.11-13/0175r2
Abstract
• This document is to describe the understanding of the
backward compatibility feature for 802.11aj for the
60GHz frequency band
• To respond to 11-13/0292r0 – Backward compatibility
of 11aj with 11ad
• This contribution has been discussed in CWPAN group
Submission
Slide 3
Xiaoming Peng
April 2013
doc.: IEEE 802.11-13/0175r2
Background
• IEEE 802.11aj PAR specified backward
compatibility to IEEE 802.11ad.
– Definition of backward compatibility is crucial to 802.11aj in
deciding the level of support required.
– There is no consensus yet on the meaning of backward
compatibility.
– In this presentation, we present a definition based on broad
principles of fairness and efficiency.
– Seek to achieve a broad consensus within 802.11aj Task Group if
possible or identified the points of contention for future resolution.
Submission
Slide 4
Xiaoming Peng
April 2013
doc.: IEEE 802.11-13/0175r2
Backward Compatibility Feature
802.11aj MAC
(amendment to 802.11-2012 +
amendment to 802.11ad)
802.11aj
STA
60GHz
802.11ad PHY
802.11aj PCP 802.11ad
STA
802.11aj PHY in
60GHz
802.11aj PHY in
45GHz
Scenario: 802.11aj (60GHz)
802.11aj Architecture
• Only when 802.11aj device operates over Chinese 60GHz
channel, it is required to keep the backward compatibility to
802.11ad
Submission
Slide 5
Xiaoming Peng
April 2013
doc.: IEEE 802.11-13/0175r2
Comments on 11-13/0292r0
• 11-13/0292r0 highlighted the following
– 11n does not have modes: 11n has PHY formats (legacy, HT-MM, HTGF) with associated usage rules to ensure backwards compatibility
– Greenfield “mode” does NOT imply that there is no backward
compatibility
– Greenfield allows data transmissions in a BSS to be restricted to a given
mode (e.g., HT), but backward compatibility still exists
• Use of HT-GF format is subject to an array of restrictions to minimize
backwards compatibility issues. E.g., review the HT Protection, Nongreenfield
HT STAs Present and OBSS Non-HT STAs Present fields in the HT Operation
element, and associated normative text
• It is agreeable to remove the “Exclusive Mode”
described in 11-13-1750r0 in the following slide
Submission
Slide 6
Xiaoming Peng
April 2013
doc.: IEEE 802.11-13/0175r2
Compatibility Modes
(IEEE 802.11 Precedent)
 IEEE 802.11n supports three compatibility modes to a/b/g
 Legacy Mode
 Mixed Mode
 Greenfield Mode
 We propose 11aj to support two correspondingly
compatibility modes to 11ad
 Legacy Model (Large Band Only Mode)
•
802.11aj operate as 802.11ad device (Outside China).
 Mixed Mode
•
Submission
802.11aj can support both the 802.11ad STAs and 802.11aj STAs.
Slide 7
Xiaoming Peng
April 2013
doc.: IEEE 802.11-13/0175r2
Legacy Mode
• 802.11aj devices will operate according to
802.11ad channels and protocols.
• No new protocols required.
• Used primarily when 802.11aj devices are
operating outside of China.
Submission
Slide 8
Xiaoming Peng
April 2013
doc.: IEEE 802.11-13/0175r2
Mixed Mode
• 802.11aj BSS can support the operation of both
the 11ad devices and 11aj devices.
– 802.11ad STAs able to join the network and perform data
exchange with AP/PCP and other STAs in 802.11aj BSS
– 802.11aj STAs able to join the network and perform data
exchange with other 802.11aj STAs;
• Formation of new network
– 802.11ad AP/PCPs can start a new network if channel is
available.
Submission
Slide 9
Xiaoming Peng
April 2013
doc.: IEEE 802.11-13/0175r2
Principles in Determining
Channel Access
• Principle: Equal priority between IEEE 802.11ad
and IEEE 802.11aj STA.
• Application of the principles to the different
operating scenarios
– Formation of new network
– New STAs joining existing network
Submission
Slide 10
Xiaoming Peng
April 2013
doc.: IEEE 802.11-13/0175r2
Thank YOU
Submission
Slide 11
Xiaoming Peng