1. TGy Overview Date: 2008-03-24 Authors: March 2008 March 2008
doc.: IEEE /0437r0
March 2008
TGy Overview
Date:
Authors:
Peter Ecclesine, Cisco Systems
Peter Ecclesine, Cisco Systems

2. March 2008
doc.: IEEE /0437r0
March 2008
Abstract
This submission summarizes the TGy amendment to IEEE
Peter Ecclesine, Cisco Systems
Peter Ecclesine, Cisco Systems

3. March 2008
doc.: IEEE /0437r0
March 2008
TGy Report
The Contention-Based Protocol Study Group was started in March 2005, to examine the opportunity afforded by FCC Report and Order and Memorandum Opinion and Order (FCC 05-56)
TGy started after March 2006 plenary, received 39 submissions, created 72 body pages of draft text, and is in second recirculation IEEE Sponsor Ballot
Peter Ecclesine, Cisco Systems
Peter Ecclesine, Cisco Systems

4. Amendments to standard
March 2008
doc.: IEEE /0437r0
March 2008
Amendments to standard
IEEE ™ + P802.11k D P802.11r D9.0 + P802.11y D9.0
1184 pages pages pages + 72 pages = 1592 body text pages
Peter Ecclesine, Cisco Systems
Peter Ecclesine, Cisco Systems

5. Licenses Exclusive area license for frequency band
March 2008
doc.: IEEE /0437r0
March 2008
Licenses
Exclusive area license for frequency band
Exclusive path license (47 CFR /80/90 GHz, FCC 05-45)
Non-exclusive license (47 CFR 90)
License exempt operation (47 CFR 15)
Experimental license (limited area, limited deployment)
“NOTHING IS IMPOSSIBLE IN THE LAW” - Clark Byse
License is an asset, and equipment can be capitalized
No license = no fees = no enforcement
No jurisdiction = no fines = no enforcement
(in California, 1 of every 3000 vehicles is a police car)
(in California, cities buy radar/laser for the CHP, and split the fines)
Peter Ecclesine, Cisco Systems
Peter Ecclesine, Cisco Systems

6. Many large metropolitan areas are restricted!
March 2008
doc.: IEEE /0437r0
March 2008
Metropolitan Areas Requiring Coordination with FSS and Government Sites
FSS protection zones in blue
Government protection zone in green
Top 50 counties by population (2000 census) in red
Many large metropolitan areas are restricted!
Peter Ecclesine, Cisco Systems
Peter Ecclesine, Cisco Systems

7. March 2008
outdoors
SlotTime was wrong in the base standard, but was corrected in 2007
In slotted Aloha, SlotTime is the round-trip time between the most distant station pair, but in the old standard, SlotTime was the one-way time between the most distant station pair
A 1 microsecond SlotTime works to ~150 meters
Coverage Class allows distances to ~10 miles ( to 93 uS aAirPropagationTime)
Because there are no adjustable preambles in the standard, outdoor products use non-standard adjustments to their radios
Peter Ecclesine, Cisco Systems

8. March 2008
802.11y CCA change
Adjustable Clear Channel Assessment threshold (Energy Detect) allows an operator to adjust the politeness of radios
Radios have improved since a became a standard in 1999, and can operate with lower received signal levels than -82 dBm (the lowest required signal for 6 Mbps operation)
802.11y lowers the threshold by at least 10 dB, and allows the operator to require even lower thresholds to protect more distant stations.
Peter Ecclesine, Cisco Systems

9. March 2008
Enabling STA
Is allowed higher power (to 1W/MHz), and can enable dependent stations (to 40 mW/MHz)
defines the enabling signal received directly from the enabling STA as Beacon frames with the GPS lat/lon of the enabling STA
Enabling signal can turn off, and all dependent stations will be disabled within 60 seconds
All other messaging can be by tunneling / upper layers
Peter Ecclesine, Cisco Systems

10. March 2008
Two examples
A licensed operator installs a few enabling STAs to cover an oil field, then uses dependent stations at each pump or truck or rig. The IT department manages all the radios.
A fire station locates an enabling STA on its communications tower, and uses dependent stations on each fire truck and laptop. The incident commander controls the enabling STA using a Public Safety band radio.
Peter Ecclesine, Cisco Systems