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802.11ad New Technique Proposal

802.11ad New Technique Proposal

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802.11ad New Technique Proposal

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  1. 802.11ad New Technique Proposal Authors: Date: 2010-03-15 Yuichi Morioka, Sony Corporation

  2. 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

  3. 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

  4. 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

  5. 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

  6. 2.4/5G 60G 2.4/5GHz & 60GHz Migration Scenario 60G Data assisted by 2.4/5G Management PC Dynamic Data Switching between 2.4/5G and 60G HGW/AP • 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.

  7. 2.4/5G 60G 2.4/5GHz & 60GHz Migration Scenario 60G Data assisted by 2.4/5G Management PC Dynamic Data Switching between 2.4/5G and 60G HGW/AP • 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.

  8. 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

  9. 2.4/5GHz Beaconing for 60GHzService Discovery • 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 Example 2.4/5GHz Beacon Structure Yuichi Morioka, Sony Corporation

  10. 2.4/5GHz Beaconing for 60GHzBeacon Offset (1/2) • 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 Example 2.4/5GHz Beacon Structure Yuichi Morioka, Sony Corporation

  11. 2.4/5GHz Beaconing for 60GHzBeacon Offset (2/2) • 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 60GHz Beacon Reception Sequence 60GHz Beacon Reception Sequence Yuichi Morioka, Sony Corporation

  12. 2.4/5GHz Beaconing for 60GHzScheduling (1/2) • 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 Example 2.4/5GHz Beacon Structure Yuichi Morioka, Sony Corporation

  13. 2.4/5GHz Beaconing for 60GHzScheduling (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

  14. 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

  15. 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

  16. 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

  17. 2.4GHz Assisted 60GHz Training • 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 60GHz Training Frame Structure Yuichi Morioka, Sony Corporation

  18. 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

  19. 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

  20. Reference Yuichi Morioka, Sony Corporation