1. Tutorial Introduction Section
July 2010
Tutorial Introduction Section
Date:
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Steve Shellhammer, Qualcomm
Steve Shellhammer, Qualcomm

2. July 2010
Abstract
This presentation is the Introduction section of the July Tutorial. It will be incorporated in the final version of the Tutorial presentation.
Steve Shellhammer, Qualcomm

3. Tutorial Outline Introduction Need for Coexistence
July 2010
Tutorial Outline
Introduction
Brief overview of FCC rules
Standards activities in TVWS
Need for Coexistence
The Coexistence Problem
TVWS Use Cases
IEEE Project
Project Title, Scope and Purpose
Project Timeline
System Design Document
Possible Coexistence Solutions
Leverage incumbent protection mechanisms for TVWS coexistence
Modify network/device parameters to improve coexistence
Steve Shellhammer, Qualcomm

4. July 2010
FCC Rules on TVWS
In November 2008 the FCC issued a Report and Order (R&O) on unlicensed wireless use of unused TV channels, called TV white space (TVWS)
A number of petitions for reconsiderations were filed and the FCC still needs to respond to the petitions. Current forecasts are for the FCC to respond by the end this year.
In any given location in the US there are a number of TV channels unused by the broadcast industry. The number varies significantly from location to location
Each channel is 6 MHz wide
Channels are in the VHF and UHF frequency bands
Details in a subsequent slide
FCC defines two classes of TVWS devices
Fixed
Portable
Steve Shellhammer, Qualcomm

5. Permissible TV Channels
July 2010
FCC Rules on TVWS
TV Channel
Frequency Band
Frequency (MHz)
Allowed Devices 2
VHF
54 – 60
Fixed
5 – 6
76 – 88
7 – 13
174 – 216
14 – 20
UHF
470 – 512
21 – 35
512 – 602
Fixed & Portable 36
602 – 608
Portable 38
614 – 620
39 – 51
620 – 698
Permissible TV Channels
Steve Shellhammer, Qualcomm

6. FCC Rules on TVWS Fixed devices use outdoor antenna Permitted TX Power
July 2010
FCC Rules on TVWS
Fixed devices use outdoor antenna
Between 10 and 30 meters above ground
Permitted TX Power
Fixed – 30 dBm with up to 6 dBi antenna gain
Portable – 20 dBm with no antenna gain
Adjacent TV Channels
Fixed – Not permitted
Portable – Reduce power to 16 dBm
Strict Out-of-band Emissions
Classes of Portable Devices
Mode I – Client
Mode II – Access Point
Steve Shellhammer, Qualcomm

7. FCC Rules on TVWS Geo-location & Database access Spectrum Sensing
July 2010
FCC Rules on TVWS
Geo-location & Database access
Must be supported in both Fixed and Portable Mode II devices
Accuracy of 50 meters
FCC will certify the official databases
Spectrum Sensing
ATSC and NTSC TV signals
Wireless microphones
Sensing down to -114 dBm (approx -15 dB SNR)
Will consider “sensing-only” devices but with much more stringent testing required
Steve Shellhammer, Qualcomm

8. July 2010
Non-US TVWS Rules
Other regulatory regions are also preparing TVWS rules
Some of the regulatory regions working on TVWS rules include
Canada
United Kingdom
Singapore
Nederland Antilles
Finland
The rules in these regions are likely to have some similarities with the US rules but will likely not be exactly the same
In other parts of the world the TV channel bandwidths are 6, 7 and 8 MHz. So TVWS support for these different bandwidth is expected
Steve Shellhammer, Qualcomm

9. TVWS Related Standard Projects
July 2010
TVWS Related Standard Projects
Standard/Project
Summary
Status
IEEE af
WLAN in TVWS
Task Group working on draft
IEEE
Coexistence in TVWS
Open Call for Proposals
IEEE
WRAN in TVWS
WG Letter Ballot
IEEE
Beacon for Protection of Wireless Microphones
Sponsor Ballot
IEEE
WRAN Installation & Deployment
Developing Draft
ECMA 392
MAC/PHY in TVWS
Standard December 2009
IEEE a
Mobile wireless access in TVWS. Above MAC/PHY
Close to WG Letter Ballot
IEEE
Logical Interface between spectrum sensors
In Sponsor Ballot
ETSI RRS
Reconfigurable Radio Systems
Four active WGs
ITU-R WP1B
Preparing for WRC 2012
Developing definitions of CR & SDR
Steve Shellhammer, Qualcomm