1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: WNG Liaison Report, Nov 2007
Date Submitted: 11/15/2007
Source: Kursat Kimyacioglu, Philips Research
Address 540 Alder Drive, Milpitas, CA 95010
Voice: , FAX: ,
Abstract: This document highlights the actions taken by the IEEE WNG SC during the Nov Plenary Meeting in Atlanta, GA
Purpose: Liaison report
Notice: This document has been prepared to assist the IEEE P It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.
Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P

2. IEEE 802.11 WNG Liaison Report for Nov. ’07 Atlanta Plenary
Kursat Kimyacioglu

3. 802.11 WNG Liason Report A Summary
Only one session was held at Tue. AM1
Three presentations were made
Extreme BW Wireless Area Networks Utilizing THz Frequencies
Current Status of THz Spectrum Allocation
CP Support in
WG members are urged to participate in regulatory activities to allow active communications and networking solutions operating over THz spectrum
Action: .11 WNG will draft a letter for .11 chair to write to.18 chair to be sent to ITU as a contribution

4. Presentation 1: Extreme BW Wireless Area Networks Utilizing THz Frequencies David Britz/AT&T
Doc No: IEEE /2068r0
We are running out of Radio spectrum, Where do we go next?
TeraHertz (is 300 GHz and above)
Attenuation at/around 60 GHz is terrible
THz is photonic in characteristics
Could be attractive for femtocells for broadband networking
Low cost w/o DSP
Potential applications
In-Home THz Networks
HD Video Projection
Airplane Area Networks
WPANs along pedestrian paths backboned by free space optical carriers and fiber
A lot of publications and groups in action
Challenges: Atmospheric attenuation, no wall penetration
Advantages: Enormous BW (can satisfy the needs till the end of century)
License exempt
Starts from 300 GHz (not far from GHz)

5. Presentation 2: Current Status of THz Spectrum Allocation David Britz AT&T
US delegation to ITU/WRC have managed to delay THz spectrum allocations to the conference in 2011
A letter is being drafted to .11 chair to write to 18 chair for a letter to be sent to ITU
Move to define and dominate THz spectrum is well underway –outside USA
THz spectrum is being carved up among science, satellite and amateur radio interests
Commercial interests in Terahertz spectrum utilization appear to be actively excluded by ITU/WRC decision policies
Does 802/ VHT need to pay attention or push back via FCC on these proposed exclusive ITU spectrum allocations? 2007 IARU document implies ITU/WRC-2000 conference had extended a mandate that states freq bands “above” 275 GHz should be avoided by active radio communication services.
Delay to deal with the THz spectrum by ITU?WRC may allow involvement of There is a need for broader industry input.
Arab States have understood the value and have proposals at WRC to have active comms systems
Going forward
Due to the intervention of the US Delegation and others, the allocation of terahertz spectrum has been put off to 2011 or beyond
This reprieve is short lived and requires the demonstration of active service utilization
Passive systems (bands) will be protected, and bands protected could possibly be extended without active service utilization
The ITU recommends “investigation of the potential uses of the bands between 275 and 3000 GHz by suitable applications
Now we have the time to address the issue more thoroughly what part in active service research or utilization will 802xx play?

6. Presentation 3: CP Support in 802.11 Sandra Qin et al/Samsung
Document No: IEEE /2778r0
CP is considered as an application level (L7) only issue
WLAN/WPAN A/V applications are becoming more popular
CP need is becoming ubiquitous
CP support from PHY & MAC
Proximity control (Content needs to be constrained to a limited range) DTCP: Round Trip Time (RTT less than 7 ms) New work in accurate ranging is required.
Packet level link protection (DTCP & HDCP for stream based apps, packet based CP is more appropriate with copy right control bits and cipher suite negotiation. TGi & TGw works New work in m MAC layer support is required
Fading channel support (Bit error can cause false alerts , retransmission causes delay New work: Error propagation prevention
Roaming support: