ORGANIZACION DE LOS ESTADOS AMERICANOS
ORGANIZATION OF AMERICAN STATES
Comisión Interamericana de Telecomunicaciones
Inter-American Telecommunication Commission
XVII MEETING OF PERMANENT
CONSULTATIVE COMMITTEE II:
RADIOCOMMUNICATIONS
INCLUDING BROADCASTING
May 17 to 20, 2011
Santo Domingo, Dominican Republic
OEA/Ser.L/XVII.4.2
CCP.II-RADIO/doc. xx
xx April 2011
Original: English
AGENDA ITEM 8.2: PRELIMINARY PROPOSAL FOR
WRC-12
(Item on the Agenda: 3.1 (SGT4))
(Document submitted by the Delegation of Brazil)
BACKGROUND
The existing unplanned FSS bands in the 10-15 GHz range are extensively used for a number of
applications: VSAT services, DTH, broadband networks, internet services, satellite news gathering, and
backhaul links. Therefore, we have a rapid rise in demand for this frequency range.
As satellite traffic is typically symmetrical, using similar amounts of uplink and downlink spectrum, there
is a need for equal amounts of uplink and downlink spectrum in order to accommodate these services in
the most efficient manner.
In the unplanned FSS Ku band, there is more downlink spectrum available as compared to the uplink
spectrum in Region 2, as shown in the Table below.
Table
The unplanned FSS Ku band in Region 2
Frequency bands (GHz)
Bandwidth (MHz)
Earth-to-space direction (uplink)
12.7-12.75
50
13.75-14.5
750
Total spectrum in the uplink
800
space-to-Earth direction (downlink)
10.95-11.2
250
11.45-11.7
250
11.7-12.2
500
Total spectrum in the downlink
Uplink and downlink spectrum difference
1 000
200
CITEL, 1889 F ST. NW., WASHINGTON, D.C. 20006, U.S.A.
TEL: +1 202 458 3004 FAX: +1 202 458 6854 e-mail: citel@oas.org
Web page: http://citel.oas.org
Furthermore, existing constraints in part of the uplink spectrum (limits to transmit power levels, antenna
sizes and geographic locations in the band 13.75-14 GHz) make the situation even worse.
Taking this into account and the fact that Region 3 has a similar problem (250 MHz imbalance), WP 4A
has been developing a Report containing a work plan for sharing studies in order to identify suitable
frequency bands which could address this spectrum shortage while ensuring compatibility with the
existing services.
The studies are focused on identifying possible additional unplanned FSS uplink spectrum that is
contiguous (or near contiguous) to the existing allocations in order to:
–
help ensure compatibility with the existing ground infrastructure;
–
minimize the need to invest in new user equipment;
–
simplify satellite design and thereby reduce the cost of Ku satellite projects.
PROPOSAL:
The Brazilian Administration would like to propose a new agenda item for WRC-15 to address the FSS
imbalance in Ku band.
ADD
B/8.2/1
RESOLUTION 806 (WRC-07)
Preliminary agenda for the 2015 World Radiocommunication Conference
2.X
to consider possible additional allocations to the fixed-satellite service (Earth-to-space) of 200
MHz in Region 2 in parts of the band 10-16 GHz, taking into account the results of ITU-R studies, in
accordance with Resolution YYY (WRC-12).
Reason: This agenda item will address the currently imbalance in FSS allocations in unplanned bands in
Ku band.
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B/8.2/2
ADD
DRAFT RESOLUTION [YYY] (WRC-12)
Additional allocations to the fixed-satellite service in
the Earth-to-space direction
The World Radiocommunication Conference (Geneva, 2012),
considering
a)
that the existing unplanned bands for fixed-satellite service (FSS) in the 10-15 GHz range are
extensively used for a myriad of applications and these applications have triggered a rapid rise in the
demand curve for this frequency range.
b)
that in ITU Region 2, the spectrum allocated to the unplanned fixed-satellite services (FSS) in the
Earth-to-space and space-to-Earth direction in the 10-15 GHz band are 800MHz and 1.0GHz respectively;
c)
that the 200 MHz difference of capacity in considering b) create bandwidth limitation in the
Earth-to-space direction and therefore stop satellite operator from fully and effectively utilizing the
limited frequency resource to cope with the rapid rise of spectrum demand in considering a;)
d)
that there is a need to resolve the shortage of spectrum in the Earth-to-space direction as described
in considering c) such that the rapid growth of spectrum demand in considering a) could be eased and the
limited spectrum resources can be used in an efficient and economical way in accordance with the
principle of Article 44 of ITU Constitution;
e)
that additional allocations to the unplanned fixed-satellite service in the Earth-to-space direction,
that is contiguous (or near contiguous) to the existing allocations, is needed to solve the spectrum
insufficiency issue in considering c) and d);
f)
that frequency allocation should, wherever possible, allocate frequency bands to the most broadly
defined services with a view to providing the maximum flexibility to administrations in spectrum use,
taking into account safety, technical, operational, economic and other relevant factors as recommended in
Recommendation 34 (WRC-95);
g)
that frequency allocation should, wherever possible, allocate frequency bands on a worldwide
basis (aligned services, categories of service and frequency band limits) taking into account safety,
technical, operational, economic and other relevant factors as recommended in Recommendation 34
(WRC-95),
resolves to invite ITU-R
to complete, for WRC-16, studies of possible bands for new allocations to the fixed-satellite service in the
Earth-to-space direction in the range 10-16 GHz, taking into account sharing and compatibility studies,
without placing undue constraints on the existing services allocated in this frequency range;
invites administrations
to participate actively in these studies by submitting contributions to ITU-R.
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