Panorama internacional das
discussões sobre a importância e a
proteção do espectro de satélite
2o Seminário de Gestão do Espectro – Uma Visão de Futuro
ANATEL - 17 e 18 de setembro de 2015
Pascale Dumit
Summary
• WRC-15 Agenda Item 1.1: “Concerns” of Resolution 233 (WRC12)
• Results from JTG studies: Approved ITU C-band downlink report
• WRC-15 Agenda Item 1.1: Summary from CPM text
• WRC-15 Agenda Item 1.1: Summary from CPM text on IMT
Spectrum Requirements
• Summary from the ITU WP 5D meeting in Halifax, Canada June
2014
• WRC-15 Agenda Item 1.1: Key Takeaway
• WRC-15 Agenda Item 10: The importance of Regulatory
Certainty
• WRC-15 Agenda Item 10: ICT-317669-METIS/D5.3
• Proposed Approach on 5G/IMT2020
• WRC-15 Agenda Item 10: Regional summary
WRC-15 Agenda Item 1.1:
“Concerns” of Resolution 233 (WRC-12)
RESOLUTION 233 (WRC-12): “Studies on frequency-related
matters on International Mobile Telecommunications and
other terrestrial mobile broadband applications”
 Considering
 (j) “that harmonized worldwide bands and harmonized
frequency arrangements for IMT and other mobile
broadband systems are highly desirable in order to achieve
global roaming and the benefits of economies of scale;”
 (m) “the need to protect existing services when considering
frequency bands for possible additional allocations to any
service;”
WRC-15 Agenda Item 1.1:
“Concerns” of Resolution 233 (WRC-12)
resolves to invite ITU-R
1 to study additional spectrum requirements, taking into account:
– technical and operational characteristics of IMT systems, including the evolution of
IMT through advances in technology and spectrally-efficient techniques, and their
deployment;
– the bands currently identified for IMT, the technical conditions of their use, and the
possibility of optimizing the use of these bands with a view to increasing spectrum
efficiency;
– the evolving needs, including user demand for IMT and other terrestrial mobile
broadband applications;
– the needs of developing countries;
– the time-frame in which spectrum would be needed;
2 to study potential candidate frequency bands, taking into account the results of the
studies under resolves to invite ITU-R 1, protection of existing services and the need for
harmonization,
Results from JTG studies:
Approved ITU C-band downlink report
IMT deployment in adjacent band to FSS allocation:
The C-band downlink report has been approved by both ITU Study Group 5 (mobile services
group) and ITU Study Group 4 (satellite services group) and adopted as an ITU Report in July 2015
In addition to major in-band interference, there is a real concern for out-of-band interference if IMT is
deployed in bands adjacent to FSS allocation
For Macro cells deployment in the band adjacent to FSS:
IMT macro cell deployment
(per WP 5D)
EIRP = 61 dBm
OOB emission mask= 43+10*log P
FSS allocation
Required separation distances 5km up to tens of
kilometres
(including effects from clutter)
For small cells outdoor deployment in the band adjacent to FSS:
IMT small cell deployment
(per WP 5D)
EIRP = 29 dBm
OOB emission mask= 43+10*log P
FSS allocation 5
Required separation distances:
900m-5km (including effects from clutter)
Results from JTG studies:
Approved ITU C-band downlink report
JTG studies showed significant separation required with IMT is deployed
with high EIRP (61dBm) in the band adjacent to FSS allocation:

For a specific macro-cell deployment scenario studied (study made by Intel Corporation),
the required guard-band needed to reduce separation distance to 20km was 80 MHz for
IMT deployment in adjacent band to FSS allocation.

If IMT EIRP is reduced to 29 dBm (per WP 5D small cell scenario) in the band adjacent to the
FSS allocation, this reduces separation distances needed, however separation distances still
are not negligible

Imposing a stricter IMT out-of-band emissions mask to -50 dBm/MHz (class B category of
devices) helps in further reducing the separation distances

It is important to note that in the case of the C-band downlink, the interference is onesided, i.e. FSS downlink receivers are victims of IMT transmissions and not the other way
round. FSS receivers in this case are passively receiving.
3,5GHz Band
3,4
Extended C Band
3,6 3,625
3,7
C Band
4,2
6
WRC-15 Agenda Item 1.1:
Summary from CPM text
For a specific scenario studied, for IMT operating in 3 400- 3 600 MHz and
FSS operating in 3600- 4200 MHz
~ 1 km to 30 km
Earth Station
Maximum IMT EIRP
Minimum Separation
61 dBm/10 MHz
30 Km + 2 MHz guardband
(WP5D IMT macro-cell)
20 Km + 80 MHz
29 dBm / 10 MHz
20 Km + 1 MHz guardband
(WP5D IMT small-cell)
5 KM + 2 MHz
WRC-15 Agenda Item 1.1:
Summary from CPM text on IMT Spectrum
Requirements
Summary of IMT spectrum requirements from CPM Report Section 1/1.1/3.1:
•
Report ITU-R M.2290 provides the results of studies that estimate the total
global spectrum requirements for IMT to be in the range of 1340 (for
lower user density settings) to 1960 MHz (for higher user density settings)
for the year 2020
•
The methodology utilized in the Report can be used to estimate the total
IMT spectrum requirements of a given country only if all the current input
parameter values used in this report are replaced by the values which
apply to that specific country
•
There is no information on the use of the spectrum already identified for
terrestrial IMT by a previous WRC
WRC-15 Agenda Item 1.1:
Summary from CPM text on IMT spectrum
requirements
Summary of IMT spectrum requirements from CPM Report Section 1/1.1/3.1
(page 27):
WRC-15 Agenda Item 1.1:
Summary from CPM text on IMT spectrum
requirements
 This means that WP 5D did take into account “the bands currently identified for
IMT, the technical conditions of their use, and the possibility of optimizing the use
of these bands with a view to increasing spectrum efficiency” per Resolves 1 “to
study additional spectrum requirements taking into account” of Resolution 233
(WRC-12)
 Moreover, it is critical to clarify that this total global estimate of 1340 MHz (for
lower user density settings) and 1960 MHz (for higher user density settings) is a
TOTAL GLOBAL figure for 2020, which means that
1)
2)
It is not individual country specific
It includes spectrum ALREADY identified for IMT.
 For the Americas for example, there is already a total of 951 MHz which has
already been identified for IMT by previous WRCs.
Summary from the ITU WP 5D meeting in Halifax,
Canada June 2014
Inputs for SWG future spectrum requirements for terrestrial IMT estimates
•
Liaison statement (Document 5D/617) from the Joint Task Group 4-56-7 (JTG).
•
5D/605 (NDR, ZDF), 651 (EBU), 667 (J, KOR), 680 (UMTS Forum), 693
(LUX, UAE), 694 (LUX), 696 (YahSat, et al.), 716 (NDR, ZDF)
o Some of the input parameters employed in the Report were not
realistic and consequently proposed to initiate a revision of the
Report
o Input parameters used in Report M.2290 were, in fact, realistic
and provided additional information as references; therefore, no
revision of the Report would be required.
o Table 1 summarizes the matters raised in these inputs documents.
Summary from the ITU WP 5D meeting in Halifax,
Canada June 2014 (continued)
Summary from the ITU WP 5D meeting in Halifax,
Canada June 2014
SWG Estimate had an extensive discussion on development of a draft reply liaison
statement to the JTG in which two different views were presented on how to
convey WP 5D’s considerations
•
•
View #1: WP 5D reaffirms that Report ITU-R M.2290 is the estimation of the IMT
spectrum requirements.
View #2: A review and subsequent revision of Report ITU-R M.2290 is necessary
to address concerns and correct the results in that Report for the IMT
spectrum requirements
o
o
Input contributions identified various inconsistencies and incorrect input assumptions,
Spectrum estimations are significantly too high
Due to difficulty to reach consensus on the contents of the draft reply liaison
statement, the meeting agreed not to send a reply liaison statement to the JTG.
Already-Identified IMT Bands Such As 2.6
GHz Can Be Used for High-Capacity
Using Band 41 (2.6 GHz), Field Trials Show
“Network Densification Using Small Cells Can
Lead to 1000x Capacity Increase Compared to
Traditional Deployments with High QoS and
User Experience.”
-- Qualcomm Field Trials Conclusion
(NASCAR-Environment )
WRC-15 Agenda Item 1.1:
Key Takeaway
There is a critical need to protect FSS operating in the adjacent
band 3600-4200 MHz per Resolution 233 (WRC-12) as FSS
downlink receivers in this case are passively receiving and are
victim of IMT transmissions
Extreme caution should be taken when relying on IMT
estimates as the basis for critically important
telecommunications policy decisions, both domestically and
internationally given that their underlying accuracy has not
been evaluated in any systematic manner
WRC-15 Agenda Item 10:
The importance of Regulatory Certainty
One of the top business risk in
telecommunication is lack of regulatory certainty
As new market
structures emerge,
the regulatory
approach to these
evolving sector
ecosystems remains
unclear and
consequently policy
challenges
undermine operators'
willingness to invest
It is critical for
governments and
regulators to adopt
regulatory certainty
alongside clarity and
consistency in
policies for any
service (be it mobile
or satellite service) to
continue to attract
and grow
investments
Regulatory certainty in even more critical to satellite industry,
as satellite lifespan is typically 15-20 years
WRC-15 Agenda Item 10: ICT-317669-METIS/D5.3
5G spectrum needs and usage principles
 Assessments of the spectrum range 380 MHz–275 GHz
 The range 5.925–95 GHz of higher frequency bands was
assessed in detail.
 Current regulation applied in the band
 Physical propagation properties of the bands.
 Outcome: prioritization of the bands.
METIS project:
https://www.metis2020.com/wp-content/uploads/deliverables/METIS_D5.3_v1.pdf
WRC-15 Agenda Item 10: ICT-317669-METIS/D5.3
5G spectrum needs and usage principles
 This document explains:
 Expected spectrum scenarios
 The resulting spectrum needs,
 Methodology for evaluating scenarios and needs,
 Suitable spectrum bands and principles for their use
 KPIs (Key Performance Indicators) to evaluate potential technical solutions
 Technology components.
 The deliverable contains:
 Techno economic analysis of expected spectrum usage for future 5G systems
 Foreseen functional architecture of spectrum usage for 5G system
 Related Technical Components linked with the KPIs that will enable their evaluation.
Overview of spectrum opportunities in
5.925-40.5 GHz
“It is apparent that the
current regulatory
framework does impose a
difficult situation for
introduction of wide area
covering systems in this
band range.
The above set of assessments
provide indications on
which bands could be
included
in considerations when
starting the regulatory
process of finding spectrum
for future 5G systems.”
Overview of spectrum opportunities
40.5–100 GHz
“From these results, it should
be apparent that more
opportunities exist in higher
frequencies than in lower. This
is partly due to the increased
isolation between co-existing
systems that follows from the
propagation properties in
higher bands. It is also a
consequence of the applied
search criteria, in particular
the assessment focused on
finding very wide bands of
contiguous spectrum (1 GHz
was preferable). Such bands
are difficult to find in lower
frequencies.”
WRC-15 Agenda Item 10: Excerpts from METIS project as
published in IEEE Communications Magazine “Scenarios
for 5G Mobile and Wireless Communications: The Vision
of the METIS Project”
“The highest
priority for the
next work for
frequencies
above 6 GHz is
on frequencies
between 40 and
90 GHz.”
WRC-15 Agenda Item 10:
Regional summary
There seems to be worldwide agreement and support for
studying the bands: 31.8-33.4 GHz, 66-71 GHz, 71-76 GHz.
They are currently supported by:
APT, CEPT, CITEL and RCC
Proposed Approach on 5G/IMT2020
If a future WRC-2019 Agenda Item for 5G/IMT2020 is agreed at WRC-2015
1
Ensure IMT/5G frequency bands are focused to avoid an Agenda Item 1.1 all over again
2
Avoid negative impact and allocation in existing terrestrial and core satellite bands
This approach will…
1
Provide opportunities to accommodate 5G/ IMT in higher mmWave frequencies
2
Avoids detrimental effect to current and future investments in terrestrial and satellite systems.
3
Ensure sustainable outcome for satellite services and other terrestrial services which does not
require eventual displacement of those satellite / terrestrial services.
Win- Win
WRC-15 Agenda Item 10:
Bands supported by the satellite industry
for compatibility studies
under a future WRC-2019 for 5G/IMT 2020
31.8 - 33.4 GHz
At around 60 GHz (and
frequencies above),
oxygen absorption is
such that it would
facilitate the possibility
of sharing the same
band between services.
59.3-66.0 GHz
66.0 – 71.0 GHz
71.0 - 76 GHz
This is a potential total of 23.3 GHz
of spectrum for study for
5G/IMT2020
81.0 – 86.0 GHz
We do not question the legitimacy of asking for more spectrum, but it is also legitimate to
question how much spectrum is needed. We would simply caution administrations to
approach spectrum requests with some practical realism. Why introduce regulatory
uncertainty in bands below 31 GHz which are already heavily used by various existing
critical radiocommunication systems when the 5G/IMT2020 systems are still in the
conceptual stages and alternative bands for these systems could be available?
Excluding bands below 31 GHz is a win-win approach for regulators because it provides
a fair and workable balance of the needs of the terrestrial mobile industry and the
existing critical radiocommunication systems .
Thank You
Pascale Dumit
Manager, Spectrum Management & Development
email: [email protected]