VHT SG Report to EC

1. VHT SG Report to EC Authors: Date: 2008-07-14 Eldad Perahia, Intel Corporation

2. Overview • IEEE 802.11 VHT SG is proposing two PARs both of which will result in MAC and PHY modifications to 802.11 • Amendment to 802.11 in bands <6 GHz • Amendment to 802.11 in the 60 GHz band • Both task groups will modify the 802.11 MAC with changes to the channel access mechanism specific to their PHY and operating band • Orthogonal frequency division multiple access and spatial division multiple access for <6 GHz • Directional antennas in 60 GHz • Both PARs propose to increase the throughput of 802.11 beyond that of 802.11n • 1 Gbps multi-station throughput in <6 GHz band • 1 Gbps single link throughput in 60 GHz • Applications discussed in the study group include (many are enhancements of 802.11n applications) • From Wi-Fi Alliance liaison report (https://mentor.ieee.org/802.11/file/07/11-07-2988-04-0000-liaison-from-wi-fi-alliance-to-802-11-regarding-wfa-vht-study-group-consolidation-of-usage-models.ppt): • Wireless Display • In Home Distribution of HDTV and other content • Rapid Upload and Download of large files to/from server • Backhaul Traffic (e.g. Mesh, Point-to-Point) • Campus / Auditorium deployments • Manufacturing Floor Automation • Usage models from other submissions: • High speed cable replacement (HDMI, monitor), wireless docking, sync and go, wireless local area networking, IMT-Advanced Eldad Perahia, Intel Corporation

3. <6 GHz PAR • Enhance network capacity to at least 1 Gbps by emphasizing multi-station throughput in scope • Techniques discussed in the study group include orthogonal frequency division multiple access and spatial division multiple access • Single link throughput of at least 500 Mbps • Theoretically capable with 802.11, but requires four antennas and 40 MHz • 80 MHz channel discussed in study group to enable 500 Mbps with only two antennas for handheld devices • PAR scope specifically excludes 2.4 GHz from bands under consideration Eldad Perahia, Intel Corporation

4. 60 GHz PAR • The 60 GHz ISM band provides the opportunity for much wider band channels than in <6 GHz enabling single link throughputs greater than 1 Gbps • Two aspects of the PAR ensure distinct identity from 802.15.3c • Enable fast session transfer between PHYs • Maintain the 802.11 user experience (as explained in the Additional Explanatory Notes) • Fast session transfer provides seamless rate fall back between VHT and 802.11n for multi-band devices • Provides expected WLAN coverage from combo 60 + 2.4/5 GHz devices • As an amendment to 802.11, VHT maintains the 802.11 user experience • maintaining the network architecture of the 802.11 system • E.g. infrastructure basic service set, extended service set, access point, station • Reuse and maintain backward compatibility to 802.11 management plane • E.g. association, authentication, security, measurement, capability exchange, MIB • Coexistence • Coexistence of various systems in the 60 GHz band is an important issue to VHT demonstrated by being explicitly called out in the PAR scope • Furthermore, the task group will produce a coexistence assurance document Eldad Perahia, Intel Corporation

5. Links to PARs and 5Cs and Response • <6 GHz • https://mentor.ieee.org/802.11/file/08/11-08-0807-03-0vht-below-6-ghz-par-nescom-form-plus-5cs.doc • 60 GHz • https://mentor.ieee.org/802.11/file/08/11-08-0806-03-0vht-60-ghz-par-nescom-form-plus-5cs.doc • Response to feedback • https://mentor.ieee.org/802.11/file/08/11-08-0880-01-0vht-reponse-to-official-comments.ppt Eldad Perahia, Intel Corporation