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

2. April 2007
doc.: IEEE /0570r0
July 2008
Overview
IEEE VHT SG is proposing two PARs both of which will result in MAC and PHY modifications to
Amendment to in bands <6 GHz
Amendment to in the 60 GHz band
Both task groups will modify the 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 beyond that of n
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 n applications)
From Wi-Fi Alliance liaison report (
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

3. April 2007
doc.: IEEE /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 , 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

4. April 2007
doc.: IEEE /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 c
Enable fast session transfer between PHYs
Maintain the user experience (as explained in the Additional Explanatory Notes)
Fast session transfer provides seamless rate fall back between VHT and n for multi-band devices
Provides expected WLAN coverage from combo /5 GHz devices
As an amendment to , VHT maintains the user experience
maintaining the network architecture of the system
E.g. infrastructure basic service set, extended service set, access point, station
Reuse and maintain backward compatibility to 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

5. Links to PARs and 5Cs and Response
April 2007
doc.: IEEE /0570r0
July 2008
Links to PARs and 5Cs and Response
<6 GHz
60 GHz
Response to feedback
Eldad Perahia, Intel Corporation
Eldad Perahia, Intel Corporation