802.11ad New Technique Proposal March 2010 doc.: IEEE 802.11-10/0xxxr0 March 2010 802.11ad New Technique Proposal Date: 2010-03-15 Authors: Yuichi Morioka, Sony Corporation Yuichi Morioka, Sony Corporation

March 2010 doc.: IEEE 802.11-10/0xxxr0 March 2010 Abstract 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 Yuichi Morioka, Sony Corporation Yuichi Morioka, Sony Corporation

March 2010 doc.: IEEE 802.11-10/0xxxr0 March 2010 60GHz for 802.11 Family 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 Yuichi Morioka, Sony Corporation Yuichi Morioka, Sony Corporation

User Expectations for 802.11ad March 2010 doc.: IEEE 802.11-10/0xxxr0 March 2010 User Expectations for 802.11ad 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 Yuichi Morioka, Sony Corporation Yuichi Morioka, Sony Corporation

March 2010 doc.: IEEE 802.11-10/0xxxr0 March 2010 Migration with past 802.11 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 Yuichi Morioka, Sony Corporation Yuichi Morioka, Sony Corporation

March 2010 doc.: IEEE 802.11-10/0xxxr0 March 2010 2.4/5GHz Assisted 60GHz 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 Yuichi Morioka, Sony Corporation Yuichi Morioka, Sony Corporation

2.4/5GHz Beaconing for 60GHz Service Discovery March 2010 doc.: IEEE 802.11-10/0xxxr0 March 2010 2.4/5GHz Beaconing for 60GHz Service Discovery Example 2.4/5GHz Beacon Structure 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 Yuichi Morioka, Sony Corporation Yuichi Morioka, Sony Corporation

2.4/5GHz Beaconing for 60GHz Beacon Offset (1/2) March 2010 doc.: IEEE 802.11-10/0xxxr0 March 2010 2.4/5GHz Beaconing for 60GHz Beacon Offset (1/2) Example 2.4/5GHz Beacon Structure 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 Yuichi Morioka, Sony Corporation Yuichi Morioka, Sony Corporation

2.4/5GHz Beaconing for 60GHz Beacon Offset (2/2) March 2010 doc.: IEEE 802.11-10/0xxxr0 March 2010 2.4/5GHz Beaconing for 60GHz Beacon Offset (2/2) 60GHz Beacon Reception Sequence 60GHz Beacon Reception Sequence 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 Yuichi Morioka, Sony Corporation Yuichi Morioka, Sony Corporation

2.4/5GHz Beaconing for 60GHz Scheduling (1/2) March 2010 doc.: IEEE 802.11-10/0xxxr0 March 2010 2.4/5GHz Beaconing for 60GHz Scheduling (1/2) Example 2.4/5GHz Beacon Structure 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 Yuichi Morioka, Sony Corporation Yuichi Morioka, Sony Corporation

2.4/5GHz Beaconing for 60GHz Scheduling (2/2) March 2010 doc.: IEEE 802.11-10/0xxxr0 March 2010 2.4/5GHz Beaconing for 60GHz Scheduling (2/2) 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 Yuichi Morioka, Sony Corporation Yuichi Morioka, Sony Corporation

2.4/5GHz management frames for 60GHz - Broadcast March 2010 doc.: IEEE 802.11-10/0xxxr0 March 2010 2.4/5GHz management frames for 60GHz - Broadcast 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 Yuichi Morioka, Sony Corporation Yuichi Morioka, Sony Corporation

2.4/5GHz management frames for 60GHz - Training March 2010 doc.: IEEE 802.11-10/0xxxr0 March 2010 2.4/5GHz management frames for 60GHz - Training 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 Yuichi Morioka, Sony Corporation Yuichi Morioka, Sony Corporation

2.4/5GHz Control Frames to assist 60GHz BF March 2010 doc.: IEEE 802.11-10/0xxxr0 March 2010 2.4/5GHz Control Frames to assist 60GHz BF 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) Yuichi Morioka, Sony Corporation Yuichi Morioka, Sony Corporation

2.4GHz Assisted 60GHz Training March 2010 doc.: IEEE 802.11-10/0xxxr0 March 2010 2.4GHz Assisted 60GHz Training 60GHz Training Frame Structure 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 Yuichi Morioka, Sony Corporation Yuichi Morioka, Sony Corporation

March 2010 doc.: IEEE 802.11-10/0xxxr0 March 2010 Conclusions 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 Yuichi Morioka, Sony Corporation Yuichi Morioka, Sony Corporation

March 2010 doc.: IEEE 802.11-10/0xxxr0 March 2010 Strawpoll 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 Yuichi Morioka, Sony Corporation Yuichi Morioka, Sony Corporation

Reference March 2010 March 2010 doc.: IEEE 802.11-10/0xxxr0 Yuichi Morioka, Sony Corporation Yuichi Morioka, Sony Corporation