Doc.: IEEE 802.11-10/0259r02 Submission Date: 2010-03-15 802.11ad New Technique Proposal March 2010...

doc.: IEEE 802.11-10/0259r02

Submission

Date: 2010-03-15

802.11ad New Technique Proposal

March 2010

Yuichi Morioka, Sony CorporationSlide 1

Name Company Address Phone email Yuichi Morioka Sony Corporation 5-1-12 Kitashinagawa

Shinagawa, Tokyo +81-3-5448-4018 [email protected]

Ted Booth Sony Electronics Inc.

16530 Via Esprillo, San Diego, CA

+1-858-942-8044 [email protected]

Ichihiko Toyoda NTT 1-1, Hikarinooka, Yokosuka, Japan

+81 46 859 3494 [email protected]

Yasushi Takatori

NTT 1-1, Hikarinooka, Yokosuka, Japan


Yusuke Asai NTT 1-1, Hikarinooka, Yokosuka, Japan


Authors:

doc.: IEEE 802.11-10/0259r02

Submission

• In order to differentiate from other 60GHz standards, 802.11ad should support Wireless LAN range

• 802.11ad should effectively migrate over past 802.11 standards, to add support for this range

• Schemes that use 2.4/5GHz frames to assist 60GHz operation are proposed in this document

Abstract

March 2010


doc.: IEEE 802.11-10/0259r02

Submission

• 60GHz is a promising technology that will provide throughputs over 1Gbps

• 60GHz can provide solutions for various applications from local file transfer to HD Video transfer

• Due to its benefits, there are competing standards that also use 60GHz

• 802.11ad needs clear and simple messaging to differentiate from “non-WLAN” technology

60GHz for 802.11 Family

March 2010


doc.: IEEE 802.11-10/0259r02

Submission

• User will expect of 802.11ad…– the same experience as past 802.11 plus faster data rate

– the same ranges as past 802.11• 802.11 should provide consistant Wireless LAN ranges

• The “because it is 60GHz” excuse will not be understood by the user

• Users will not tolerate implementer centric excuses– Have caused many standards to die

– May turn users away from 802.11ad

• 802.11ad must support a mode of operation that provides equivalent range as with past 802.11, to meet user expectation and to succeed in the market

User Expectations for 802.11ad

March 2010


doc.: IEEE 802.11-10/0259r02

Submission

• Merit of 802.11ad is that it can build upon past successful standards

• Natural evolutionary path is to have 802.11a/b/g/n capability coinciding with 802.11ad– E.g. 802.11a/n/ad system

– We rarely see 802.11n stand alone chips

• 802.11ad should fully utilize its past assets, to better provide the expected user experience

Migration with past 802.11

March 2010


doc.: IEEE 802.11-10/0259r02

Submission

2.4/5GHz & 60GHz Migration Scenario

HGW/AP

PC

2.4/5G60G

Dynamic Data Switching between 2.4/5G and 60G

60G Data assisted by 2.4/5G Management

• Two ways to use 2.4/5GHz to better facilitate 60GHz– Fast Session Transfer: Dynamic switch of Data Flow between 2.4/5GHz

– 2.4/5GHz Assisted 60GHz: Use of 2.4/5GHz to provide coordination between 11ad STAs. Data Flow is on 60GHz.

doc.: IEEE 802.11-10/0259r02

Submission

• Beamforming would be the key technology to enhance 60GHz range

• However, beamforming could only be functional after discovery and training of the target device

• If 802.11a/b/g/n can coincide with 802.11ad, they can be used to better facilitate 60GHz beamforming

2.4/5GHz Assisted 60GHz

March 2010


doc.: IEEE 802.11-10/0259r02

Submission

• One simple solution is to utilize 2.4/5GHz Beacons to provide service discovery for 60GHz

• This will allow 802.11ad STAs to discover the presence of 802.11ad AP even when they are out of 60GHz omni range

• Definition of 60GHz Capability IE may be adequate

2.4/5GHz Beaconing for 60GHz Service Discovery

March 2010


Example 2.4/5GHz Beacon Structure

doc.: IEEE 802.11-10/0259r02

Submission

• Along with 2.4/5GHz Beacon, 60GHz Beacon may be sent to maintain interoperability with other 60GHz systems

• If the transmission timing of the 60GHz Beacon is notified using the 2.4/5GHz Beacon, it will be easier for the 11ad STAs to discover the necessity of updating its beamform information

2.4/5GHz Beaconing for 60GHz Beacon Offset (1/2)

March 2010



doc.: IEEE 802.11-10/0259r02

Submission

• By notifying the tx timing of the 60GHz Beacon through 2.4/5GHz Beacon, 11ad STAs could adjust the rx beam-pattern to the AP at the defined timing

– Provided that prior training sequence has occurred

• If the 60GHz Beacon is not received at the expected time (as in STA3 above), the STA immediately knows that re-training is necessary

March 2010


2.4/5GHz Beaconing for 60GHz Beacon Offset (2/2)

60GHz Beacon Reception Sequence

60GHz Beacon Reception Sequence

doc.: IEEE 802.11-10/0259r02

Submission

• Furthermore, 2.4/5GHz Beacons could provide Scheduling Information for 60GHz

• This information could be used to adjust the rx/tx beam-pattern to the intended receiver/transmitter to maximize the range

2.4/5GHz Beaconing for 60GHz Scheduling (1/2)

March 2010



doc.: IEEE 802.11-10/0259r02

Submission

• The receiver (in the above case the AP) could adjust the rx beam-pattern to the scheduled transmitter

– The transmitter (STA) could also beamform the RTS frame to the AP

2.4/5GHz Beaconing for 60GHz Scheduling (2/2)

March 2010


doc.: IEEE 802.11-10/0259r02

Submission

• Management frames such as 2.4/5GHz Re-Scheduling Frame can be defined to better facilitate 60GHz

• 2.4/5GHz frames can be used to communicate with all members of the BSS while 60GHz frames are used to communicate to one member

2.4/5GHz management frames for 60GHz - Broadcast

March 2010


doc.: IEEE 802.11-10/0259r02

Submission

• 2.4/5GHz management frames could also be beneficial to aid between STAs whose 60GHz training information is not available or too aged

• 2.4/5GHz Training Request/Confirm management frames can be used to initiate 60GHz training procedure

2.4/5GHz management frames for 60GHz - Training

March 2010


doc.: IEEE 802.11-10/0259r02

Submission

• 2.4/5GHz Control Frames can provide fully integrated system between 60GHz and 2.4/5GHz

• 2.4/5GHz Control Frames can assist 60GHz training– Signal the start of 60GHz Training Frame (e-RTS)– Provide feedback information and Acknowledgement information (e-CTS)

2.4/5GHz Control Frames to assist 60GHz BF

March 2010


doc.: IEEE 802.11-10/0259r02

Submission

• In order to maximize range, the 60GHz Training Frame could be configured in a way that it contains multiple beam patterns

– The start of the 60GHz Training Frame could be signalled with 2.4/5GHz frame

• The beamformee could report back the strongest beam pattern it receives– Feedback can be sent using 2.4/5GHz training frames

2.4GHz Assisted 60GHz Training

March 2010


60GHz Training Frame Structure

doc.: IEEE 802.11-10/0259r02

Submission

• Several ways to effectively use 2.4/5GHz frames to assist 60GHz operation has been proposed– 2.4/5GHz Beaconing

– 2.4/5GHz Management Frames assisted 60GHz scheduling

– 2.4/5GHz Management Frames assisted 60GHz training

– 2.4/5GHz Control Frames assisted 60GHz training

• The proposed methods will provide the necessary range to satisfy end user

• These key features will make 802.11ad an unique and successful 60GHz standard

Conclusions

March 2010


doc.: IEEE 802.11-10/0259r02

Submission

• Do you feel an optional feature that uses 2.4/5GHz frames to assist 60GHz operation is worth further exploration within 802.11ad?– Yes

– No

– Don’t know/Don’t care

Strawpoll

March 2010


doc.: IEEE 802.11-10/0259r02

Submission

Reference

March 2010


Doc.: IEEE 802.11-10/0259r02 Submission Date: 2010-03-15 802.11ad New Technique Proposal March 2010...

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