VHT SG Report to EC Date: 2008-07-14 Authors: July 2008 April 2007 doc.: IEEE 802.11-07/0570r0 July 2008 VHT SG Report to EC Date: 2008-07-14 Authors: Eldad Perahia, Intel Corporation Eldad Perahia, Intel Corporation

April 2007 doc.: IEEE 802.11-07/0570r0 July 2008 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 Eldad Perahia, Intel Corporation

April 2007 doc.: IEEE 802.11-07/0570r0 July 2008 <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 Eldad Perahia, Intel Corporation

April 2007 doc.: IEEE 802.11-07/0570r0 July 2008 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 Eldad Perahia, Intel Corporation

Links to PARs and 5Cs and Response April 2007 doc.: IEEE 802.11-07/0570r0 July 2008 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 Eldad Perahia, Intel Corporation