Preserving access to satellite services in c band and addressing the imt challenge
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Preserving Access to Satellite Services in C-band… and Addressing the IMT Challenge. Annette M. Purves Satellite Spectrum Initiative GVF. Why Should I Care about C-band? C-band is the ‘Lifeblood’ for Critical Services!. Critical Aeronautical and Meteorological Information.

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Preserving Access to Satellite Services in C-band… and Addressing the IMT Challenge

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Preserving access to satellite services in c band and addressing the imt challenge

Preserving Access to Satellite Services in C-band… and Addressing the IMT Challenge

Annette M. Purves

Satellite Spectrum Initiative

GVF


Why should i care about c band c band is the lifeblood for critical services

Why Should I Care about C-band?C-band is the ‘Lifeblood’ for Critical Services!

Critical Aeronautical and Meteorological Information

Maritime Communications

Wireless Extension

Corporate Networks

Telemedicine

C-band `

Distance Education

Internet Connectivity

Disaster

Relief

Peace Keeping

TV Contribution and Distribution


What is at stake spectrum for your satellite services

What Is at Stake?Spectrum for Your Satellite Services!

In 2007, proponents of International Mobile Telecommunications (“IMT”) systems requested 1280-1720 MHz of spectrum by the year 2020 [Source: Report ITU-R M.2078]

By 2015, the IMT industry is seeking another 163 to 1075 MHz of additional spectrum – often totaling more than 2000 MHz

Sharing studies have been conducted between IMT and incumbent services for candidate bands

These studies show that sharing is NOT FEASIBLE.


What interference are we talking about terrestrial interference

What Interference Are We Talking about?Terrestrial Interference!

  • WRC-15 Agenda Item 1.1 will consider additional spectrum generally for IMT and other mobile broadband applications

    • C-band is on the menu!

C-band earth stations

IMT station grid

The aggregate effect of all interfering terrestrial stations is a significant interference to C-band receive earth stations


Where are the c band earth stations extensive distribution

Where Are the C-band Earth Stations?Extensive Distribution!

Nationwide issue wheregeographic separation is NOT possible!

5000 earth stations registered…

Another 2000 estimated but not registered...

Enabling valuable services to millions of individuals.

Source: Comsearch


How does this affect my country interference affects everyone

How Does This Affect My Country?Interference Affects Everyone!

  • Interference into C-band receive earth stations can completely overpower the satellite’s signal at the receiver

  • 3 forms of interference:

    • Co-frequency interference

    • Out-of-band emissions

    • LNA and LNB overdrive

  • How does the ITU and WRC-15 come into this?

    • The studies and preparatory work that is being undertaken at present will impact the views and decisions of national administrations when they make the final decision: C-band or IMT?


What are industry s concerns

What Are Industry’s Concerns?

Renewed efforts to identify the 3400–4200 MHz band () for IMT

2007 studies demonstrated incompatibility between FSS and IMT

Interference from IMT transmissions into FSS receive stations

Large separations between IMT stations and FSS earth stations

No technology developments that change the compatibility analysis

ITU studies conducted to date are reinforcing the 2007 results!

New efforts to identify the 5850–6725 MHz band () for IMT

ITU is conducting sharing studies for this band

Current studies show excessive interference into satellites, even from indoor IMT systems

Receiving IMT stations are susceptible to interference from transmitting FSS earth stations


Exclusion zone sample

Exclusion Zone Sample

Example of exclusion zone with a radius of 20 km around an earth station in Singapore


The wrc 15 process

The WRC-15 Process


Itu and regional preparatory proceedings leading to wrc 15

ITU and Regional Preparatory Proceedings Leading to WRC-15

Jul 2013 Jan 2014 Jan 2015 Nov 2015

Regional Groups

Conference Preparatory Meeting (CPM)

Final Meeting 23 March-2 April, 2015

World Radiocummunication Conference (WRC-15)

November 2-27, 2015

ARPM

Sep ‘15

ARPM

May ‘14

ARPM

Jan‘14

ARPM

Oct ‘13

ARPM

Jan‘15

ATU

WG

WRC-15 Apr ‘13

WG

WRC-15 Apr ‘14

WG

WRC-15 Nov ‘13

WG

WRC-15 Nov ‘13

ASMG

APG

Jun ‘14

APG

Jul ‘13

APG

Sep ‘15

APG

Dec ‘14

APT

CPG & CPG PTD

Jan‘15

CPG & CPG PTD

Sep ‘14

CPG

Sept‘13

CPG PTD

Sep ‘13

CPG PTD

Sept ‘15

CPG PTD

May ‘14

CEPT

PCC.II May‘15

PCC.II Nov ‘13

PCC.II Oct 14

PCC.II May‘14

CITEL

WG

WRC-15 Apr ‘14

WG

WRC-15 Jan ‘15

WG

WRC-15 Sep‘15

RCC

Working Party 5D

WP5D

WP5D

WP5D

WP5D

WP5D

WP5D

Joint Task Group 4-5-6-7

Submits CPM Text

TG

JTG

JTG

JTG

August ‘14


Itu and regional preparatory proceedings leading to wrc 151

ITU and Regional Preparatory Proceedings Leading to WRC-15


Itu and regional preparatory proceedings leading to wrc 15 cont

ITU and Regional Preparatory Proceedings Leading to WRC-15 – cont.


What are the implications for the pacific islands

What are the Implications for the Pacific Islands?

  • Critical dependency on C-Band for communications and for economic existence and quality of life

  • Disaster mitigation and relief

  • Submarine cables, where available, only serve a single landing point. There are many islands

  • C-band provides a complementary backbone role for future mobile applications (e.g., 4G in Kiribati)

  • Ku- and Ka-bands are heavily affected by rain fade and cannot substitute for C-band

  • Wrong decisions at WRC-15 would be crippling


What can i do get involved

What Can I Do?Get Involved!

  • Participate in the local and international preparatory processes leading to WRC-15

    • JTG 4-5-6-7 preparations and contributions

    • APT preparations and contributions

    • Assist other countries through common proposals

      Follow through all the way to WRC-15!


What are the key messages

What Are the Key Messages?

  • C-band services provide critical infrastructure today and will continue to do so in the future

  • C-band cannot be “replaced” with Ku- and Ka-bands

  • While sharing with point-to-point fixed services is possible, sharing with nomadic/mobile point-to-area services is NOT!

  • Other frequency bands are much better suited for IMT

  • Terrestrial wireless services should first utilize assigned frequency bands before pursuing bands extensively used by existing services

  • Significant investment in satellites and ground infrastructure has been made and would be stranded

    • Once satellites are in space (15-18 years), the frequencies on the satellite CANNOT be changed!


Preserving access to satellite services in c band and addressing the imt challenge

Thank You!

  • More questions? Let us know!

  • The satellite industry stands ready to provide more material and

  • background information.

    • David Hartshorn ([email protected])

    • Annette Purves ([email protected])


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