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Intelligent Transportation Systems© 3M 2001
Presentation of 3M Companyfor the
Special Meeting of the IRACon
GPS Repeaters
October 28, 2005
by Harold MordkofskyBlooston, Mordkofsky, Dickens, Duffy & Prendergast202-828-5520 / [email protected]
Intelligent Transportation Systems© 3M 2001
3M’s interest in GPS repeaters (or re-radiators)
For use in conjunction with Opticom™ GPS system
Intelligent Transportation Systems© 3M 2001
3M’s proposal will include restrictions on use and operation
GPS repeaters will not fall into the wrong hands
Use will not compromise conventional GPS equipment
Use will not cause interference to other GPS users
Intelligent Transportation Systems© 3M 2001
Implementation of 3M’s proposal will:
Significantly contribute to safety of life and property
Satisfy the concerns of regulators
Intelligent Transportation Systems© 3M 2001
3M is seeking experimental authorization to:
Demonstrate equipment to prospective purchasers
Test equipment – obtain regulatory approval
Conduct field studies to evaluate interference potential
Intelligent Transportation Systems© 3M 2001
Opticom™ GPS system features
Controls traffic signal priority
Does not disrupt normal traffic flow
Intelligent Transportation Systems© 3M 2001
Need for GPS repeaters
Emergency vehicles must acquire GPS signal quickly
GPS signal provides location and timing synchronization
Intelligent Transportation Systems© 3M 2001
How the 3M Opticom™ GPS system works
Transmitter on emergency vehicle sends 2.4 GHz signal
Receiver near intersection converts signal to electronic communication
Phase selector in controller cabinet request priority advantage to control traffic light
Traffic light turns green as emergency vehicle approaches intersection
GPS repeater assures that all of this takes only seconds from start of run
Intelligent Transportation Systems© 3M 2001
How the 3M Opticom™ GPS system works
Emergency vehicles shielded from GPS signal since housed in closed buildings
Use of GPS repeater allows vehicle to be “locked on” to GPS signal at all times
Intelligent Transportation Systems© 3M 2001
Without GPS repeater, acquisition of GPS signal is delayed by:
Time to start up vehicle and exit the building
Shielding from trees, tall buildings and other obstacles
Critical delay of up to five minutes before emergency vehicle could lock on to GPS signal
Precious time may be lost in emergency circumstances!
Intelligent Transportation Systems© 3M 2001
0%
Before 4 minutes 42% survived
After4 minutes7% survived
Time InMinutes
1 2 3 4
Survival Rate – Cardiac Arrest Cole and Corday “Four-minute Limit for Cardiac Resuscitation”
911 Emergency ResponseManagement – Travel and Response Time
minutes
Intelligent Transportation Systems© 3M 2001
Flashover
Fire test jointly conducted by Factory Mutual Research and Harvard University
911 Emergency ResponseManagement – Travel and Response Time
Intelligent Transportation Systems© 3M 2001
Typical GPS repeater installation:
GPS repeater in building in view of vehicle
EIRP limited to -140 dBm at 100 ft.
With 3 dB antenna, ERP limited to 39.8 pW
Notification to FCC of particulars of operation
location, number of units
power, emission designator
any other information deemed pertinent
Intelligent Transportation Systems© 3M 2001
3M’s use of GPS repeaters would be within present regulatory limitations
Radiation below level permitted by FCC for spurious emissions
Intelligent Transportation Systems© 3M 2001
Adherence to NTIA policy objectives:
Individual license for each GPS repeater
FCC will have full particulars of operation
No operation for more than six months without regular license
Use of GPS repeater terminates if any reported interference cannot be eliminated
Two-year license term and listing of approved sites in accessible database
Intelligent Transportation Systems© 3M 2001
Potential interference is strictly limited
Use under control of public safety officials – well known in their communities.
Other users of GPS notified of use of GPS repeaters
“Stop buzzer” phone no. available 24/7
GPS repeater shuts down pending investigation and remediation
Other emergency uses of GPS not compromised
Intelligent Transportation Systems© 3M 2001
3M will provide periodic reports as requested by FCC
Proposed use of GPS repeaters will contribute to development of standards
Will provide federal government with valuable information
Intelligent Transportation Systems© 3M 2001
Summary
Proposal strictly tailored to limit use and avoid interference
Will operate inside buildings
Will operate at lowest power possible
Will be under supervision of local government public safety officials
Intelligent Transportation Systems© 3M 2001
Summary
Use of GPS repeaters will save lives!
serves an important function of FCC’s regulation of radio
3M will institute rulemaking based on information developed during experimental operations