Transcript 19-05-0009-00-0000-US-BPL-regulatory-status

March 2005
doc.: IEEE 802.19-05/0009r0
U.S. BPL Regulatory Status
Date: 2005-03-17
Authors:
Name
Company
Barry O’Mahony Intel
Corporation
Address
th
2111 NE 25
Hillsboro, OR
97124
Phone
email
+1 (503)
264-8579
[email protected]
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Submission
Slide 1
Barry O'Mahony, Intel Corporation
March 2005
doc.: IEEE 802.19-05/0009r0
Agenda
• Old FCC rules applicable to BPL
• New FCC rules for BPL
• Summary
Submission
Slide 2
Barry O'Mahony, Intel Corporation
March 2005
doc.: IEEE 802.19-05/0009r0
Old FCC Rules
• Broadband Over Powerline (BPL) systems operate under Part 15
on an unlicensed basis.
• As with any Part 15 system, BPL may interfere with licensed
systems only to the extent that the interference does not rise to the
level of “harmful interference”
– FCC definition of harmful interference is “Any emission, radiation or
induction that endangers the functioning of a radio navigation service or
of other safety services or seriously degrades, obstructs or repeatedly
interrupts a radiocommunications service operating in accordance with
this Chapter” [i.e., FCC Rules 47 C.F.R.]
• Prior to October 2004, operated under rules for Carrier Current
Devices
– 15.3(f): “A system, or part of a system, that transmits radio frequency
energy by conduction over the electric power lines”
Submission
Slide 3
Barry O'Mahony, Intel Corporation
March 2005
doc.: IEEE 802.19-05/0009r0
Carrier Current System Rules
• Conducted Limits
– Part 15.107(c)
– 1000 uV in the band 535-1705 KHz
• Radiated Limits
–
–
–
–
–
Submission
Part 15.109(e)
9 KHz – 30 MHz: same as for intentional radiators
Above 30 MHz: same as for other unintentional radiators
Measured at 3 “typical” installations
At each installation, measurements taken on at least 16 radials
around the equipment
Slide 4
Barry O'Mahony, Intel Corporation
March 2005
doc.: IEEE 802.19-05/0009r0
Carrier Current System – Issues
• Measurement Procedures ambiguous
– How to apply to distributed BPL systems?
• Suspicion that measurements at radials around a point
do not accurately evaluate radiated emissions
– Since equipment in question is connected to a large-scale wireline
network
• Instances of interference reported
– Interference asserted to be “harmful”
• Regulatory uncertainty believed to be inhibiting
deployment of BPL
Submission
Slide 5
Barry O'Mahony, Intel Corporation
March 2005
doc.: IEEE 802.19-05/0009r0
Revision of FCC rules for BPL
• May 2003 Notice of Inquiry (NOI) proposes new category of
“Access BPL”, specifically for BPL systems
• March 2004 Notice of Proposed Rule Making (NPRM)
• April 2004 release of NTIA Report on BPL
– Analyzes potential effects of BPL on Federal wireless systems
– Analyzes 10 million measurements made on BPL systems, and extensive
analytical modeling
• October 2004 Report and Order (R&O) adopts new rules
– Access BPL allowed in 1.705 – 80 MHz band
– Incorporates many recommendations in NTIA Report
– Also defines “In house BPL”
Submission
Slide 6
Barry O'Mahony, Intel Corporation
March 2005
doc.: IEEE 802.19-05/0009r0
New FCC Rules – Salient Points
• “Access BPL”: A carrier current system installed and
operated on an electric utility service as an unintentional
radiator that sends radio frequency energy on frequencies
between 1.705 MHz and 80 MHz over medium voltage
lines or over low voltage lines to provide broadband
communications and is located on the supply side of the
utility service’s points of interconnection with customer
premises
• New Subpart (Subpart G) of Part 15
• Principal change is in measurement guidelines, rather than
limit levels
Submission
Slide 7
Barry O'Mahony, Intel Corporation
March 2005
doc.: IEEE 802.19-05/0009r0
New Access BPL Rules (2)
• Radiated limits for Access BPL
– Medium Voltage (1KV-40KV) distribution lines
• Limits unchanged from old Carrier Current rules
– Low Voltage (120V/240V) drop lines
• Limits below 30 MHz relaxed to match those of other unintentional radiators
• Must include ability to remotely control frequency and power
levels, and shut down individual components
– Including ability to notch frequencies 20 dB ( <30 MHz) or 10 dB (>30
MHz) below applicable Part 15 levels
• Must register in publicly available database
• Must consult with local public safety users
• Must comply with exclusion bands and exclusion zones
Submission
Slide 8
Barry O'Mahony, Intel Corporation
March 2005
doc.: IEEE 802.19-05/0009r0
New Access BPL Rules (3)
• Exclusion bands for Aeronautical stations and aircraft receivers
– Applies to overhead medium voltage installations
– No operation on 2.85-3.025, 3.4-3.5, 4.65-4.7, 5.45-5.68, 6.525-6.685,
8.815-8.965, 10.005-10.1, 11.275-11.4, 13.26-13.36, 17.9-17.97, 21.924-22,
74.8-75.2 MHz
• Exclusion zones
–
–
–
–
Applies to overhead medium voltage installations
Within 1 Km of coast stations
Within 29 Km of VLBA radio astronomy installation
Certain additional frequencies excluded in these regions
• Consultation Areas
– Access BPL operators required to consult with certain aeronautical and
other Federal entities in certain geographic areas
Submission
Slide 9
Barry O'Mahony, Intel Corporation
March 2005
doc.: IEEE 802.19-05/0009r0
New measurement guidelines
• Antenna height 1m for <30 MHz, varied 1-4m to maximize
emissions for >30MHz
• Tested as a complete system, with all couplers, injectors, etc.,
installed
• Overhead MV lines
–
–
–
–
10m horizontal separation distance
Slant range distance used when applying distance correction factors
Measured at 0, ¼, ½, ¾, and 1 wavelength along line from injection point
Repeated for each Access BPL system component
• Underground MV lines
– Measured at 16 radials around pad-mounted transformer
– Essentially unchanged from old Rules
Submission
Slide 10
Barry O'Mahony, Intel Corporation
March 2005
doc.: IEEE 802.19-05/0009r0
Summary
• October 2004 FCC R&O adds Subpart G to Part 15,
addressing Access BPL and In-house BPL systems
• New Measurement Guidelines for overhead MV lines
adopted
– Intended to ensure that potential distributed radiation from
overhead lines is accurately measured.
– Emission limits themselves unchanged;
– But more realistic measurement scenarios will result in lower
injected power in order to meet these limits
Submission
Slide 11
Barry O'Mahony, Intel Corporation