1. sg-whitespace-09-0007-07-0000 Project
IEEE 802 Executive Committee Study Group on TV White Spaces – ADHOC USE CASE SUB-GROUP
Title
ECSG ADHOC USE CASE SLIDE DECK
Date Submitted
Source(s)
Contributor: Nanci Vogtli, Affiliation Concrete Logic Voice: (408) ,
Contributor: Richard Paine, Affiliation Self Voice: ,
Contributor: Dan Lubar, Affiliation RelayServices Voice: (877) ,
Contributor: Scott Blue, Affiliation: Sensable Radio,
Contributor: Gerald Chouinard, Affiliation CRC,
Contributor: Jack Unger, Affiliation WISPA ,
Abstract
IEEE 802 ECSG on White Space ADHOC USE CASE slide deck to capture TVWS USE CASE Sceneraios
Purpose
To provide input to the ECSG and others on possible use cases that will help clarify how the TVWS spectrum might be used and how these uses might possibly be addressed by IEEE 802 work.
Release
The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.
Patent Policy and Procedures
The contributor is familiar with the IEEE-SA Patent Policy and Procedures:
< and <
Further information is located at < and <

2. 802 Whitespace Use Cases Goal: to help the 802 EC to determine next steps for 802 and its WG's in the TVWS by presenting known use cases

3. Whitespace Use Case Review
Group decision to discuss use cases based on the regulatory constraints
≤4W fixed devices Use Case
≤4W fixed device to ≤100mW portable devices Use Case
≤100mW portable devices Use Case
≤50mW (Sense Only) portable devices Use Case
≤40mW portable devices Use Case
International Use Case
Future looking NOI Use case
Shellhammer Input
Broadband wireless internet access? Yes, including VOIP over broadband, but may use the frequencies for other applications like sensors or in-home devices that do not require broadband wireless internet access.
Ranga Reddy Input
Star/tree/mesh? Maybe?
Have we covered sufficiently the requirements?
Categorize by power
Terms: Fixed, Personal/portable, Master, client
Identify all devices that might be involved. 
Contrast what is different between licensed bands and new frequency
Note: devices do not need to be operating at maximum power but rather ‘up to’ => “≤”

4. Whitespace Use Case Terms
Terms from the FCC Report and Order
Fixed/Outdoor Device (ex: towers, water towers, homes, farms, farm silos, etc.)
Personal/Portable Device (ex: portables, laptops, smartphones, desktops, etc.)
TV Protected Contour (41 dBμV/m on channel)
”receive antenna”** height for fixed deployments: 10m
ie Height for fixed/outdoor device: ≤3 m up to 30m (see Table 3 in the R&O)
10m seems to be to provide a base “interference distance” for a typical DTV receive antenna
** The ambiguity of the phrase “receive antenna” will likely be the subject in a number of re-consideration filing that FCC will see after publication of the R&O (FCC ) & its errata 4

5. US FCC Antenna Height and Channel Use
R&O Table 3
No fixed unlicensed TVBD can transmit either co-channel or adjacent channel, inside a TV channel's protected contour (41 dBuV/m) and within the keep-out distance specified in Table 3 of the R&O.
note that the height of the fixed/outdoor broadband transmit antenna is allowed over a range of <=3m up to 30 m (see Table 3 in R&O )
10 m is in fact related to the height of the sensing antenna to provide reliable sensing to secure a base "interference-free distance" from a DTV station or wireless microphone operation as long as the transmit antenna is not installed higher than the sensing antenna. The height of the receiving antenna would simply improve (>10m) or worsen (<10m) the performance of the fixed broadband operation itself but will have no effect on interference potential towards incumbents
in practice, it is likely that these three (sensing, receiving, transmitting) antennas will be integrated into one physical unit, thus installed at the same height, currently between 10 m and 30 m.

6. Adjacent Channels (N+/-1) Alternate Channels (N+/2 and beyond)
US FCC Regulatory Use Case Matrix
Unlicensed TV Band Device transmissions generally* allowed within a TV protected contour are indicated by "A" and transmission cases disallowed are indicated by "D".
Co-Channel (N)
Adjacent Channels (N+/-1)
Alternate Channels (N+/2 and beyond)
≤4W Fixed D A
≤4W Fixed to ≤100mW Portable
≤100mW Personal
≤50mW Sense Only Portable
≤40mW Portable
Most channels are available outside a TV protected contour (41 dBuV/m) beyond the keep-out distance specified in Table 3 of the R&O
* Note: Some channels are excluded from use by some or all TVBD's, such as Channel 37.  This exclusion even applies at locations not within a TV protected contour nor within a TV protected contour's keep-out distance

7. Architectures
The Report and Order does not limit architectures - star/tree/mesh are possible
Coupling between architectures and market place (what are the use cases the market will demand)
has a proposed star architecture for the 4W Whitespace use case

8. 4W Fixed Whitespace Use Case
Outdoor use outside the TV protected contour (41dBμV/m) and beyond the keep-out distance of all TV channels used in the area and their adjacent channels
Towns, villages
Rural areas, Farms
Suburbs
star/tree/mesh
Fixed Devices
Grain Elevator Enterprise
Slaughterhouse Enterprise
Waterpark Enterprise
Hunting Lodge
Fishing Lodge
Agriculture Enterprise
Military Equipment
Public Safety Equipment
All Business Enterprises
Geo-location
Database of
Incumbent Stations
Fixed Registered Master
Database Access
Cell Towers Installable
Private Comm. Systems
Emergency Services
Water Towers
20-30km Coverage
Suburban
Consolidated Access (MDU/MTU)
Military Operations
Public Safety
Fixed Devices
Light Residential/Suburban
Farming & Agricultural
Fixed Devices
Ranching
Mountainous
1/20/2009

9. Access point (Portable TVBD or Wi-Fi)
4W to 4W fed by 100mW Use Case
Indoor or outdoor use outside of both the protected contour
(41dBμV/m) and also the keep-out distance of all channels or adjacent channels in use in the area of operation
Towns, villages
Rural areas, Farms
Suburbs
star/tree/mesh
100mW Personal/Portable
Devices
Geo-location
Database of
Incumbent Stations
Onboard
Roaming computing devices
Internet Access
VOIP
≤4W Fixed CPE
Access point (Portable TVBD or Wi-Fi)
4W Fixed Master
Database Access
Cell Towers Installable
Private Comm. Systems
Emergency Services
Water Towers
20-30km Coverage
Suburban
Consolidated Access (MDU/MTU)
Military Operations
Public Safety
Private Radio Station
100mW Personal/Portable
Devices
100mW Personal/
Portable Devices
Mobile
Push to Talk
Internet Access
VOIP
Movable Systems
Internet Access
Onboard Tractors
VOIP
Broadcast Radio
1/20/2009

10. 4W to portable 100mW Use Case
Indoor or outdoor use outside of both the protected contour
(41dBμV/m) and also the keep-out distance of all channels or adjacent channels in use in the area of operation
Towns, villages
Rural areas, Farms
Suburbs
Urban/Metropolitan – only where spectrum is available
Download bandwidth > Upload bandwidth
star/tree/mesh
100mW Personal/Portable
Devices
Geo-location
Database of
Incumbent Stations
Onboard
Roaming computing devices
Internet Access
VOIP
4W Fixed Master
Database Access
Cell Towers Installable
Private Comm. Systems
Emergency Services
Water Towers
20-30km Coverage
Suburban
Consolidated Access (MDU/MTU)
Military Operations
Public Safety
Private Radio Station
100mW Personal/Portable
Devices
Mobile
Push to Talk
Internet Access
VOIP
100mW Personal/
Portable Devices
Movable Systems
Internet Access
Onboard Tractors
VOIP
Broadcast Radio
Personal/Portable Devices
are directly connected at
100mW near the Fixed Master
1/20/2009 10 10

11. Geo-location /Regulatory
100mW Whitespace Use Case
Indoor or outdoor use outside of both the protected contour
(41dBμV/m) and also the keep-out distance of all channels or adjacent channels in use in the area of operation
Suburban Neighborhoods
Farm
Wireless device access in a residence or farm or neighborhood
Areas of weak TV broadcast signals
Access Points – may or may not be for broadband Internet access
Unlicensed Voice Applications – ex: Femtocell-like
Point-to-Point Wireless
Physical Area
LAN 100m
Residential
Neighborhood or farm
star/tree/mesh?
Personal/Portable Devices
Personal/Portable Devices
Geo-location /Regulatory
Database of
Incumbent Stations
Personal/Portable Devices
Registered Master

12. 50mW (Sensing Only) Whitespace Use Case
Indoor or outdoor use outside of both the protected contour
(41dBμV/m) and also the keep-out distance of all channels or adjacent channels in use in the area of operation
Access Points
Unlicensed Voice Applications – ex: Femtocell-like
Point-to-Point Wireless (ie Peer to peer/DLS)
Portability
Body Area Networks (BAN) – may not be broadband Internet access
Area
Indoor Networks
PAN
10m
Personal/Portable
Devices
Personal/Portable Devices
Personal/Portable Devices
Registered Master

13. ≤ 40mW Whitespace Use Case
In-building outside the protected contour (41dBμV/m) and beyond the keep-out distance of all channels being used in the area
Body Area Networks (BAN) – may not be broadband Internet access
Protection Beacons and Microphones
In-home backhaul
Network Sensors/Control Devices
Smart Utility Networks
PANs
Personal/Portable Devices
Personal/Portable Devices
Personal/Portable Devices

14. TVWS International Service Impacts
Could Service Rules from Different Regulatory domains affect use-cases?
Any need to Harmonize Regulatory Domains/Rules for TVWS?
Are Cross-Border/National Boundaries an issue to use-cases?
Regulatory domains to harmonize?..
US rules (Part 15, Part 74, and Part 90)
Canada rules: Licensing of fixed point-to-multipoint TVWS with base station at up to 500 W EIRP at 30 m antenna HAAT (reduced power for higher HAAT) for rural broadband access
Netherlands Antilles – Initial allocation of "clean spectrum"
Transmission output of portable devices must stay within RF Safety Limits (which means allowance of power levels higher than 100mW)
Transmission output of fixed devices must correspond with heights required under the RF Safety Limits (which means allowance of power levels higher than 4W EIRP)
Aspiring operators most roll out nationwide networks (meaning the eventual use of dynamic portable MAN´s and RAN´s)
Asia rules
Australia rules

15. TVWS International Service Impacts
Regulatory domains to harmonize continued..
EU rules
UK (OFCOM)
In June 2008, Ofcom issued a Consultation Document on "Digital Dividend Review; Geographic Interleaved Awards MHz and MHz".  This document proposes that licences will be auctioned to allow use to be made of the unused blocks of spectrum between the 6 national digital TV multiplexes (i.e. whitespaces).  It is anticipated that such licences could be used for a range of applications, and hence they are proposed to be auctioned on a service-neutral and technology-neutral basis.  The Technical Licence Conditions will be specified on the assumption that the licences will be used for a "digital TV like" application, although other applications could be used providing they fit within the technical parameters specified.  (There may also subsequently be an opportunity to amend the technical licence conditions.)
The Consultation Document acknowledges that there may be an opportunity to use cognitive radio in this band, although such use is not considered in the document, however it states that Ofcom intend to issue another Consultation Document in the future specifically on the subject of cognitive radio.
 At the same time, Ofcom also issued a complementary Consultation Document on "Digital Dividend Review: MHz and MHz".  This addressed those parts of the band which are to be cleared of TV broadcast operations, to enable licences to be auctioned, most likely for new mobile broadband networks.  Consequently these parts of the band are not really appropriate for consideration as whitespaces, and hence there is very much less opportunity for cognitive radio in these frequency blocks.
ITU has recommendations for worldwide TV whitespace technologies and approaches 15

16. NOI for higher power Use Case
Will represent a “high power use case” versus current 4W TVWS R&O & Errata
Higher base station power than 4W
CPE power is unlikely to be much higher than 4W because of RF safety concern
NOI work status is unknown and may not be actively “in progress”
Maybe geared toward very Rural low density deployments covering large areas
Will provide larger coverage areas at low cost
May require both database and sensing together
May require adjustments/amendments to R&O’s “fixed wireless” rules
40 km point-to-point (phased array?) application possible 16

17. Discussion Inputs
Use case: broadband wireless Internet? Not necessarily in all cases
Whether to contribute star, tree, or mesh as part of a use case? Within a use case?
Health issues?
Security?
Keepaway zones/incumbent protection
Use of the 4W by cell towers/organizations/safety/emergency responders/etc
Economics of using competing/complementing wireless technologies
Data base
Sensing
Cognitive radio applications/Interactive radio station (IP-based transport)
Topologies depend on the use cases
Scott Blue’s Use Cases
4W fixed to 4W fixed (database access can be bootstrap)
4W fixed master 100mW portable client
100mW master to 100mW client (40mW for both in the 1st adjacent channel)
50mW sensing only client to client

18. Use Case Conclusions THE TVWS USE CASES WILL..
..be part of a larger Wireless eco-system
...be driven by Market demands, Policy requirements, & Service Rules
..may be hard to predict the most common use cases before we “get there”
..will facilitate, and be facilitated by, innovation & policy goals
..focus on standardization may need to be in sub-channelization mechanism for very low power (<40mW) devices