1. WLAN Overlay with 60 GHz Channels
March 2008
doc.: IEEE /0364r0
March 2008
WLAN Overlay with 60 GHz Channels
Date:
Authors:
Barr (Motorola)
John Barr (Motorola)

2. Purpose of this document
March 2008
doc.: IEEE /0364r0
March 2008
Purpose of this document
This proposal is to stimulate discussions and highlight a possible focus for using IEEE c PHY as a high speed channel in cooperation with IEEE (n) WLAN host.
Recommendation:
Combine strengths of with c PHY instead of attempting to create a separate 60 GHz WLAN
Barr (Motorola)
John Barr (Motorola)

3. Key elements Concepts highlighted
March 2008
doc.: IEEE /0364r0
March 2008
Key elements
Concepts highlighted
WLAN Use Case Focused
Clusters of high throughput access a desired use case
Documents that served as a foundation for this proposal
08/0344r0 - WFA VHT Usage Models
P c-DF2-Draft-Amendment.pdf
c-summary-usage-model.ppt
Barr (Motorola)
John Barr (Motorola)

4. WFA Usage Model Examples
March 2008
doc.: IEEE /0364r0
March 2008
WFA Usage Model Examples
1a: Desktop Display at home or enterprise
Pre-Conditions: User has operation WLAN network for internet access and general data networking. The wireless network used for storage and display may or may not be part of the other operational WLAN network.
Application: User can wirelessly display the output of the computer to monitor or TV using uncompressed video. User can wirelessly store data from a computer to a hard drive. The data being stored transfers at ~1Gbps, jitter is < 200msec, delay is <200msec, 10E-5 PER.
Environment: Devices could be operating in isolated cluster in a room such as a den or in close proximity to other similar clusters in a multi-cube office. Transmissions are mostly LOS. Distances between far corners of the room are <5M.
3a: Rapid Sync n Go, File Transfer
Application: User can sync movies to/from the camcorder and transfer the picture files. An MPEG4 video file of 30MB takes 4 minutes over a single hop 1Gbps link. 200 jpeg (picture) files of 10MB takes ~30 seconds over a 1Gbps single hop link. Jitter and delay are not critical. Instead, the key metric is the user’s time spent to do a transfer. Less than 1 minute is acceptable. 1-5 minutes may be acceptable. More than 5 minutes is not acceptable.
Environment: Devices could be operating in isolated cluster in a room such as a den or in close proximity to other similar clusters in multi-cube office. Transmissions are mostly LOS. Distance between far corners of the room are <8m.
Barr (Motorola)
John Barr (Motorola)

5. March 2008
doc.: IEEE /0364r0
March 2008
Sample PAR: scope
The scope of this project is the definition of an amendment to the physical layers (PHY) and the Medium Access Control Layer (MAC) so that modes of operation can be enabled that are capable of supporting:
Full compatibility with existing IEEE Std plus IEEE n amendment systems for backwards compatibility,
Recognition and allocation of dedicated VHT channels using 60 GHz PHY compatible with IEEE c amendment PHY for multi-gigabit direct links between AP-STA or STA-STA,
Partitioning of high throughput data traffic to allocated VHT channels.
Barr (Motorola)
John Barr (Motorola)

6. Sample PAR: purpose (evolution TGn)
March 2008
doc.: IEEE /0364r0
March 2008
Sample PAR: purpose (evolution TGn)
The purpose of the project is to improve the wireless local area network (LAN) user experience by providing significantly higher throughput for existing WLAN application areas and to enable new market segments that have throughput requirements that cannot be met with current 2.4 and 5 GHz channel allocations.
Barr (Motorola)
John Barr (Motorola)

7. March 2008
Concept
Typical WLAN operation provided by existing IEEE (n) radio
New device capability discovery messages created to allow VHT devices to determine whether target devices support VHT mode, manage availability of VHT channels, and allocate VHT channels to device pairs on demand
Utilize 60 GHz radio to determine if VHT channel connection possible
VHT channels utilize 60 GHz radio based on IEEE c PHY but use extended MAC for compatibility with existing applications
VHT MAC extensions allow allocation of packet traffic to (n) channel or 60 GHz channel(s):
Typical WLAN traffic routed to (n) channel
VHT traffic routed to 60 GHz channel associated with an application
Multiple 60 GHz channels could be active at the same time
Barr (Motorola)

8. March 2008
Rationale
Without allocation of additional unlicensed (or licensed) spectrum, it may not be possible to realize multi-Gbps throughput.
It will be extremely difficult to optimize 60 GHz performance while maintaining WLAN medium access concepts.
IEEE c PHY amendment has capability of supporting 5 Gbps PHY rates between two devices within 10 meters, and can support multiple 60 GHz channels in the same area with spectral and beam steering mechanisms.
IEEE c PHY will be realized by silicon providers in late 2009 and no later than end of 2010.
Barr (Motorola)