Date: Thu, 3 Feb 94 04:30:02 PST
From: Advanced Amateur Radio Networking Group <tcp-group@ucsd.edu>
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Subject: TCP-Group Digest V94 #31
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TCP-Group Digest Thu, 3 Feb 94 Volume 94 : Issue 31
Today's Topics:
219 MHz band plan
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Date: Wed, 2 Feb 1994 13:50:19 -0800
From: brian@nothing.ucsd.edu (Brian Kantor)
Subject: 219 MHz band plan
To: ham-digital@ucsd.edu
[Courtesy of Rick_Whiting@ATK.COM]
This report converted from a Word file to ASCII by W0TN to
facilitate electronic transmission, thus destroying bold
characters, underlines, many indents, etc.. So blame me, not the
Committee, for the layout!
Draft #5
INTERIM REPORT
of the ad hoc
219 MHz COMMITTEE
Introduction
This ad hoc Committee was created by direction of the Executive
Committee of the ARRL Board at its October 30, 1993 meeting in
Memphis, TN. The Committee is composed of four members selected
from the ARRL Spectrum Committee, and a Chairman selected from
the ARRL Directors. Two members of the ARRL staff were assigned
as support .The members of the Committee are:
J. Gordon Beattie, Jr., N2DSY
Tod Olson, K0TO Chairman
James Fortney, K6IYK
Paul Rinaldo, W4RI
Joel Kandel, KI4T
Jon Bloom, KE3Z
David Prestel, W8AJR
This committee was asked to prepare an action plan for
initiating Amateur activity on the 219-220 MHz band discussed in
the FCC Notice of Proposed Rule Making (ET Docket 93-40/RM-
7747), issued by the FCC March 22, 1993. The comment period for
the Docket ended July 15, 1993 and the expectation is that the
FCC will issue a Report and Order sometime after March 1994.
During the period November 15, 1993 through January 6, 1994,
Committee members exchanged preliminary information via mail,
FAX, MCI and telephone. On January 8 and 9, 1994, the Committee
held an in-person meeting in Cleveland, OH This interim report
is based upon the ideas developed during that period.
Committee members were encouraged to discuss this topic with
anyone they felt might contribute useful information. No attempt
was made to restrict the flow of information to the Amateur
community before or after the Cleveland meeting since it was the
sense of the Committee that disclosure of such information would
be not only useful, but essential to drafting a final
recommendation.
The interim report following is divided into two parts; a
background section which summarizes information and a plan for
utilization of the band.
The background section summarizes the things requested in
the ARRL petition for access to this band, the list of
requirements for Amateurs as outlined by the FCC in their
NPRM; the key expectations of the FCC and WaterCom (an AMTS
user) for Amateur use of the band and the expectations for
utilization of this frequency band from an Amateur point of
view.
The plan for utilization of the band includes specific ARRL
actions and proposals for a band plan and a coordination
procedure.
Background
The committee reviewed the original ARRL petition for access to
the band, RM-7747, the FCC Notice of Proposed Rule Making(NPRM)
Docket ET-93-40, the NewsRelease from the FCC at the time the
NPRM was issued and comments to the NPRM made by other
Amateur groups. The information developed by the Committee from
these sources is summarized in the section following. The information
is organized into that requested in the ARRL petition to the
FCC, the specific Amateur requirements outlined in the NPRM, the
expectations for Amateur use of the band as drawn from the
NewsRelease and the NPRM, expectations of the primary AMTS
organization, WaterCom; and Amateur expectations drawn from the
petition, comments and Committee conversations.
The ARRL petition for additional 1.25 meter frequencies
On June 4, 1991, the ARRL petitioned the FCC for an Amateur
service frequency allocation in the 216-220 MHz band. The
basis for that petition was the loss of the 220-222 MHz
segment by FCC action; which action had blocked evolving
Amateur activity that was moving toward creating high-speed
inter-city digital links. It had been a part of Amateur plans
and expectations that the 220-222 MHz links would be
interconnected to achieve a high-speed nationwide
communications system funded and maintained by Amateurs. This
network would serve Amateur interests in its daily operation,
but its emergency preparedness and national defense
capabilities would be available when required.
In its petition for spectrum in the 216-220 MHz band the ARRL
noted that Amateur use of that band would be on a secondary,
non-interference basis and specifically for coordinated, high-
speed digital point-to-point communication. For Amateurs to do
this successfully, it will require not only the frequency
coordination between Amateurs which is now a part of Amateur
VHF-UHF operations, but will require coordination of frequency
and direction of transmission with respect to existing, and
future, Primary Users .
Further, the ARRL felt it would not be advisable for Amateurs
to be able to access the band without prior coordination by a
spectrum manager (and)/or database administrator to assure
that chances for interference to a Primary User of the band
were minimized. The ARRL offered its services in this role and
stated its willingness to provide advice to Amateurs wishing
to initiate operation in the band as well as providing notice
to Amateur users of the band when new, non-Amateur users
initiated operation.
The ARRL proposed the following changes to the Part 97 rules :
Auxiliary station operation be permitted only in the 216-
220 MHz, 431-433 MHz and 435-438 MHz band segments.
In the 1.25 m band, the segment 216-220 MHz be used only
for point-to-point Amateur fixed operation, and
1. No Amateur station shall cause interference to
maritime mobile, fixed stations or other mobile
licenses operating in the band.
2. Prior to commencement of operation in the band ,
Amateur stations are cautioned to contact a database
administrator for frequency recommendations.
3. The licensee of the Amateur station must make all
necessary adjustments (including termination of
transmission) if harmful interference is caused.
Transmitter power be limit to 25 watts PEP when the
control operator is a Novice Class licensee and 50 watts
PEP for higher license classes.
Amateur requirements for operation as specified in the FCC NPRM
Amateurs will be required to operate on a secondary basis in
the frequency band of 219-220 MHz
Operation will be Amateur auxiliary stations or as other
Amateur fixed point-to-point operations.
Maximum symbol rate of 56 Kilo Baud for codes specified in
part 97.309(a) and a maximum of 100 KHz bandwidth for codes
not specified in 97.309(a)
Prior to initiation of operation, Amateurs within 50 miles of
an AMTS station will be required to obtain written approval
from the AMTS allowing them to operate.
Prior to initiation of operation, Amateurs further than 50
miles but within 150 miles of an AMTS station must provide
official notification of intention to begin operation at least
14 days prior to the start.
Amateurs must operate in a fashion that does not interfere
with US. Navy SPASUR no matter where the Amateur station is
located.
FCC expectations for Amateur operation in this band.
Effective utilization of this band by Amateurs is anticipated
to require technological innovation on the part of the
Amateurs. New technology as it arrives may provide cause to
consider amendment to the rules.
WaterCom (and other AMTS licensees) are expected to develop
procedures to effectively exchange data about their operations
with Amateurs so that their operations may be adjusted to
avoid interference to the AMTS.
Frequencies will be used for inter-city wide band digital
communication links.
To avoid interference to Primary Users (and to each other),
Amateur links will utilize highly directional antennas, will
employ operational flexibility, and will be coordinated. As
has been the case to this point, the FCC does not expect to
mandate frequency coordination, but instead expects Amateurs
to cooperate and coordinate on their own.
WaterCom expectations for Amateur secondary use of this band.
Amateurs are expected to perform the necessary "engineering"
to assure non-interference prior to initiating operation in
the band.
A single point of contact will exist for WaterCom to
communicate interference notices and information about
WaterCom operations.
Amateur expectations for utilization of this band.
This band is probably the only band in which a terrestrial
nationwide network is feasible. Two meter regulations do not
permit wide band, high data rate transmissions, and 70 cm does
not have as favorable propagation characteristics.
The 219-220 MHz meter band has good mid-range propagation, has
relatively little adjacent channel use, and there is no
existing use by Amateurs. For these reasons, we can structure
its use from the outset toward high speed digital point to
point links which can be assembled into a nationwide network.
At this point equipment for high speed digital links is not
readily available to Amateurs. Some 56 Kilobit half-duplex
modems are in use, but there are very few in operation at
present. Some 19.2 Kilobit links on UHF are in place. Overall,
equipment and other technology which would support data rates
greater than 150 Kilobits/sec running full duplex remain to
be developed for Amateur links. Achieving these high rates in
a nationwide network would position amateurs to be able to
send "snippets" of voice, audio and video as well as the
person to person text messages, DX spotting information and
data files that are common today.
Proposed Plan for 219 MHz
It is recommended that this band be used to establish a high
speed nationwide digital data network by linking inter-city
point-to-point Amateur stations. The Committee estimates that
700-800 individual links will be required to achieve a true,
nationwide network and may take five to ten years to reach
that stage.
Use
A proposal for a 219-220 MHz Band Plan has been prepared and
is attached as Appendix A .
It is expected that in populated areas, to compensate for the
loss of 220-222 MHz, there may be a desire to utilize the 219-
220 MHz band immediately with whatever technology may be at
hand. We believe this would be self-defeating. Strong
encouragement on the part of Local Coordinating Bodies(LCB),
the ARRL, and other groups of Amateurs to carefully coordinate
the use of this band will pay big dividends. An effective,
high-speed network will make handling of packet messages via
local bulletin board and messaging systems more productive. An
end result will be to reduce pressure on some of the 2 meter
links now in use as a message network.
Since it is very difficult to "adjust" the use of a band or
portion of a band after use has begun, we recommend that a
technical threshold be established for individual links,
assuring the success of a high speed nationwide network. At
this point, it means that no point-to-point links of 1200,
2400, 9600 or even 19,200 baud should be created.
Point-to-point transmissions on this band should be a
contiguous stream of bits with header frames for routing. The
equipment associated with the transmission between links
should not be required to be cognizant of any special
attribute or content of the bits being transmitted. Data from
all sources should be handled in a uniform manner, impartial
as to source and content.
Technology and protocol should be developed to manage data
buffering to smoothly transition from the high-speed link to
lower speed network nodes with eventual delivery of data to
the individual Amateur.
Coordination
A proposed procedure for use by Local Coordinating Bodies is
in Appendix B attached.
Coordination of stations that use this band is imperative. We
will be a Secondary User. Our use will be dependent upon
successfully engineering link installations to avoid
interference to the Primary Users. More than that,
coordination offers the best opportunity to effect orderly and
efficient entry into the band in a way that enables Amateurs
to link stations into a high-speed digital network.
Having learned from the problems of growth of digital
communications in heavily populated VHF bands, this untouched
band affords an opportunity to employ our hard won knowledge
as we plan our links.
Role of the ARRL
Administrative support
The ARRL should develop and maintain a database of current
assignments to other services in this band. This
information may include information about users adjacent to
the band as well as those operating directly in the band.
The ARRL should develop a database of amateur links
established in the band. This list will aid the coordination
process for amateurs and provide a database for reference in
the event of interference complaints.
The ARRL should establish an operating relationship with
WaterCom and other AMTS users so that a single point of
contact to handle interference complaints can be created.
Also, through this relationship, a database of AMTS users
can be acquired to assist in the designing and coordination
of Amateur links.
The ARRL should prepare and distribute upon request, a
procedure for engineering a link installation including
handling the required AMTS approval or notification.
Technical support
The ARRL should develop worksheets to assist Amateurs in
planning, engineering, and coordinating their links. A model
will be required to investigate the interference potential
of Amateur operation in a particular location. Power,
antenna orientation, terrain and location of AMTS or other
Primary Users will affect the outcome.
The ARRL should assign staff and/or sponsor studies which
will clarify the technical requirements for RF propagation
performance and the technical requirements for
modulation/bandwidth performance. The band plan in Appendix
A and the Coordination Procedure outlined in Appendix B are
predicated on several technical assumptions which require
validation.
The ARRL should spearhead the Identification of
manufacturers of Amateur and/or commercial equipment which
can meet the high performance requirements of this network.
These manufacturers should be encouraged to develop systems
and components which can be used by Amateurs to create the
high speed links.
The ARRL should stimulate and support the definition of new
protocols for use in the high-speed network. This appears
to be an appropriate task for the ARRL Future Systems
Committee. Standards of all types will have to be defined
and agreed to by members of the Amateur community. We need
to be able to smoothly couple the existing BBS systems and
links to the inter-city links. The ARRL Digital Committee
should be asked to contribute to this effort.
A network topology will need to be created which will
support the integration of diverse existing local networks.
It is not clear at this time just how this can be
effectively supported by the ARRL. We will comment further
in our final report.
Information Support
The task of assembling a nationwide network from a series of
individually engineered and owned building blocks will
require a great amount of information interchange.
The ARRL should establish a newsletter directed toward
information exchange with respect to equipment, software,
coordination activity, protocols, network topology, etc. The
emphasis here is not "professional product" but current
information that can help others. The newsletter actually
need not be published in the classic sense. We are able to
utilize existing modes of dissemination, e.g. Internet,
HIRAM, MCI, CompuServe, etc. The critical component is an
information "gatekeeper" and/or editor assigned to receive,
organize and perhaps index the information.
The ARRL should provide copies of this interim report to
existing coordinating groups, appropriate equipment
manufacturers and other interested parties making inquiry.
Copies of this report and such other information as may be
available at that time should be offered at the ARRL Booth
at the Dayton Hamvention next April.
The ARRL should provide a session at the Digital Symposium
this year devoted to discussion of the proposed nationwide
network.
Extension of 219 Committee Assignment
The 219 Committee is an ad hoc Committee which will dissolve after
it has prepared a plan for utilization of the 219-220 MHz and
presented it for consideration by the ARRL Board. Under our current
charter, we expect to issue a final report approximately 45 days after
an FCC Report and Order creating the band.
This interim report recommends that the ARRL encourage and
support the creation of point-to-point high-speed digital links in this
band in a form which permits them to be linked into a network.
The multiplicity of tasks which are a part of providing the ARRL
support and leadership in the establishment of the network, suggests
some sort of "Project Management" would be beneficial. Monitoring
the various ARRL support activities will help assure that everything
is "fitting" together. When the time comes that adjustments to the
current plan must be made, the existence of a monitoring group can
facilitate those adjustments.
We suggest that the Board authorize the existing 219 Committee to
assume the role of "Project Manager", and to perform that function
for at least one year following establishment of the 219-220 MHz
band.
APPENDIX A
219-220 MHz Band Plan
Local Coordinating Bodies should coordinate this band such that ten
100-KHz Primary channels are created centered on the following
frequencies:
Channel A 219.050
Channel F 219.550
Channel B 219.150
Channel G 219.650
Channel C 219.250
Channel H 219.750
Channel D 219.350
Channel I 219.850
Channel E 219.450
Channel J 219.950
Use of two of these channels in combination to achieve a full duplex
environment is desirable.
Since the use of the band is for point-to -point fixed operation with a
maximum of 50 watts PEP, and non-interference with Primary Users
of the band is mandatory, highly directional antennas with horizontal
polarization are recommended.
Because the plan for this band is use for inter-city links which can be
assembled into a nationwide high-speed digital network, allocation of
channels to point-to-point pairs running less than 56 Kilobits duplex
should be discouraged. No matter what the bandwidth of the
transmissions coordinated into a channel, they should be centered in
the channel. The long term objective for digital transmission on these
channels is 100 KHz bandwidth. Local Coordinating Bodies should
seek to avoid decisions which will limit the nationwide network.
APPENDIX B
**********************************
The drafting of this document was incomplete at the time of
submittal. One of our members was located in the California
Earthquake area and we were unable to communicate with him to
achieve consensus on this part. The material below should be
considered indicative of the Committee thinking, but should not be
viewed as Committee consensus. We will complete this section and
distribute it as quickly as possible after January 22, 1994.
***********************************
PROPOSED PROCEDURE
FOR COORDINATION OF AMATEUR RADIO
OPERATION ON THE 219-220 MHz BAND
I. PURPOSE
To define the process and procedure for obtaining coordination of an
Amateur Radio point-to-point relay link in the 219-220 MHz band.
II. GENERAL
A. The Amateur Radio Service is authorized to operate wide band
point-to-point digital relay links in the 219-220 MHz Band on a
secondary basis. Regulations require notice and coordination in
order to ensure that Amateur Radio operations do not interfere with
Primary Licensees.
B. The ultimate responsibility for complying with the registration,
notification, and non-interference provisions of the Regulations lies
with the individual Amateur Radio Operator. This procedure is
designed to assist the Amateur in complying with those Regulations,
and to facilitate the orderly and efficient coordination of those
Amateurs that wish to utilize the Band.
C. The 219-220 MHz allocation offers a unique opportunity for
implementation of full-duplex wide band digital circuits at a
frequency where longer distance propagation is possible. Therefore,
it is recommended that the Band usage be limited to such a service,
and that implementations which inefficiently use he recommended
100 KHz bandwidth be avoided.
D. The Amateur Radio Service has recognized Spectrum Management
and Repeater Coordination Organizations which function in a large
portion of the Country. This procedure envisions that these
organizations and the American Radio Relay League (ARRL) will,
where appropriate, assist the individual Amateur in complying with
the Regulations and good usage practices.
E. The ARRL volunteered to establish and maintain a data base which
contains information on all known Primary Licensees and their
Systems. This data base includes information on operations located
adjacent to the Band. WaterCom, a major AMTS Licensee, has
entered into an agreement with the ARRL to assist in this process.
The ARRL will also maintain a record of all authorized and
coordinated Amateur Radio Stations operating in the 219-220 MHz
Band.
F. Resolution of interference to Primary Licensees' is facilitated by
providing contact information on coordinated 219 MHz Amateur
operations from the ARRL database.
III. DEFINITIONS
For the purposes of this procedure, the following definitions apply.
A. ARRL 1.25M Data Base (ARRL 1.25M DB) - A data base that
contains licensing information for non-Amateur Primary and
Secondary Users in the 216-222 MHz frequency segment. It includes
Amateur Users in the 219-220 MHz Band that have obtained
operational coordination in accordance with this procedure.
B. ARRL Data Base Manager (ARRL DBM) - The ARRL representative
responsible for maintaining the ARRL 1.25M Data Base.
C. LOCAL COORDINATING BODY (LCB) - The applicable Spectrum
Management organization recognized under 47 C.F.R. Part 97.201(c).
This function will normally exist in one of the following forms:
1. A spectrum management organization that has some responsibility
for reviewing and authorizing 220 MHz repeater operations, and
which performs band usage planning for the non-repeater activities.
2. A spectrum management organization that has some responsibility
for reviewing and authorizing 220 MHz repeater operations, and
which has delegated band usage planning and coordination of digital
activities to a sub-unit.
3. A spectrum user (user group) who is in an area not serviced by
either #1 or #2 above.
IV. PROCEDURE
A. Application for Coordination
1. The applicant network segment implementor will determine a
path where use of the 219-220 MHz band might be applicable. The
applicant discuss plans with the local digital planners and their LCB.
2. After identifying Latitude and Longitude information for each
location, the user will submit a "Request for 219 Data" to the ARRL
DBM. This request may be forwarded through the LCB or submitted
directly to League Headquarters. (Depending upon prior activity, the
LCB may have the required information already in their files. Actual
submittal of the request may initially be by mail, but it is envisioned
that this inquiry should be available via electronic distribution in the
long term.)
3. The information returned by the ARRL DBM will include data on
all known operations within approximately 250 miles of the
identified sites. If standardized software tools for evaluating path
and site selection are available, they will be provided upon request.
4. The User is expected to apply the available models to determine if
the proposed segment is practicable, and if it falls into either the
class of stations that will require permission, or the ones that require
notification.
a. Stations located within 50 miles of an AMTS Shore Station are
required to obtain permission from the Shore Station Licensee, and
b. Stations located between 50 and 150 miles of an AMTS Shore
Station are required to Notify the AMTS Licensee 15 days prior to
operation.
5. Once the User determines that operation in the proposed segment
without interference to another user is possible, a formal "Request
for Coordination" must be submitted to the LCB. Each LCB may
require slightly different information, but normally it will include:
a. Administrative data related to the applicant,
b. System data to illustrate how this segment will be integrated into
the network,
c. Engineering data for path propagation, and
d. Engineering data documenting non-interference w/other services.
6. The LCB will act on the request based upon regular locally
developed procedures. This action will be one of the following:
a. If acceptable and no notice provisions apply, issue a "Notice of Test
Coordination" in accordance with local policy.
b. If acceptable and Notice is required, issue a "Notice of Test
Coordination" and inform the. User that they are to mail a copy of the
"Notice of Proposed Operation" to all impacted Licensees by Certified
Mail.
(1) A "Notice of Proposed Operation" must include instructions for
Licensee to copy LCB on any correspondence that may be sent on the
matter.
(2) The User is responsible for supplying LCB with copies of mailing
Certification Form(s).
c. If acceptable, and AMTS Licensee Permission is required, notify
the User of acceptable application and instruct him to apply for
permission to test from AMTS Licensee. Upon receipt of written
acceptance from AMTS Licensee, issue "Notice of Test Coordination".
(1) Request for permission to test must include instructions for
Licensee to copy LCB on any correspondence that may be sent on the
matter.
(2) User is responsible for supplying LCB with copies of all
documentation.
d. If acceptable but another Amateur circuit may be in position to be
impacted, issue a "Notice of Test Coordination" and provide co-/
adjacent channel notification.
e. If acceptable and multiple notification procedures apply, comply
with each as per above.
f. If unacceptable, deny the request.
7. The LCB will forward a copy of all "Notices of Test Coordination" to
the ARRL DBM.
8. Upon satisfactory completion of the Test Coordination Period, the
LCB issues User a "Notice of Coordination" and forwards a copy to the
ARRL DBM.
a. Operations requiring the permission of an AMTS Licensee shall
require that the User obtain a final written permission before the
LCB will issue a "Notice of Coordination".
9. The ARRL DBM will include a "Notice of Test Coordination" data in
the ARRL 219 DB for as long as the test coordination is in effect, and
will cause the "Notice of Coordination" data to be added permanently.
[ B. De coordination as a Result of Primary Licensee Changes ]
To be determined.
C. Primary User Problem Resolution
A phone, fax or written problem notification may be made by the
Primary spectrum user to the Coordinated Amateur, the LCB, and the
ARRL. The ARRL will register all correspondence related to the
complaint, and assist as appropriate, in the resolution process.
Amateur users will need to recognize that when the primary user is
no longer satisfied with sharing the spectrum, that the Amateur
operation may need to cease. This can be constrained through an
agreement with the FCC and/or primary spectrum users detailing
technical standards.
Alternative Proposal for Section IV
IV. Procedure
A. Application for Coordination
1. The prospective applicant requests procedural information
including engineering software and database from the LCB.
2. The applicant performs latitude, longitude, and engineering
analysis, with the assistance of the LCB if necessary, and submits the
results on a form to the LCB.
3. The LCB reviews the application, including the proposed location,
propagation and radiation pattern engineering, equipment,
frequency selection, and primary and amateur co-channel user
database, and notifies the applicant of the results.
If there is judged to be no potential interference to existing primary
(AMTS) and co-channel amateur users, but the applicant is within 50
or 150 miles of a primary user, the LCB issues a notification of
provisional coordination pending notification and/or permission
request to the primary user by the applicant, and a successful on-
the-air non-interference test.
If the LCB does not receive a copy of the notification and/or
permission request from the applicant within 60 days, the
provisional coordination is declared null and void by the LCB with a
written notice to the applicant.
If the applicant is not within 50 or 150 miles of a primary user or
existing amateur co-channel user, the LCB issues a Notice of
Provisional Coordination pending an on-the-air non-interference test
only.
If the LCB finds that there is potential interference to the primary
and co-channel users based on the application information, a notice is
sent by the LCB to the applicant to that effect and requesting a re-
engineering study.
4. Upon receipt of the copy of the applicant's notification/permission
request letter, the LCB issues the notice of provisional coordination
pending the non-interference test.
5. If the non-interference test is successful, and the primary user
grants permission to an applicant within 50 miles of its station, the
applicant is granted a Certificate of Coordination, and notice of same
is forwarded by the LCB to the ARRL DBM.
6. If the test is not successful, the LCB issues a letter instructing the
applicant to re-engineer the system. If the applicant chooses not to
re-engineer the system, the pending application is canceled.
------------------------------
Date: 3 Feb 94 09:12:57
From: Max Wheatley <max@acme.gen.nz>
Subject: subscribe
To: tcp-group@ucsd.edu
add max@acme.gen.nz
------------------------------
End of TCP-Group Digest V94 #31
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