Broadcast Use of 6 GHz January 23, 2020 1 U-NII II-6 (6425 6525 - - PowerPoint PPT Presentation

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Broadcast Use of 6 GHz January 23, 2020 1 U-NII II-6 (6425 6525 - - PowerPoint PPT Presentation

Oct 01, 2023 369 likes •502 views

Broadcast Use of 6 GHz January 23, 2020 1 U-NII II-6 (6425 6525 525 MHz) z) U-NII NII-8 (6875 7125 25 MHz) z) Fixed Links Studio-to-Transmitter and Intercity Relay (STL/ICR) Most in 6875 7125 MHz Engineered

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SLIDE 1

Broadcast Use of 6 GHz

January 23, 2020

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SLIDE 2

U-NII II-6 (6425–6525 525 MHz) z) U-NII NII-8 (6875–7125 25 MHz) z)

  • Fixed Links – Studio-to-Transmitter and Intercity Relay (STL/ICR)
  • Most in 6875–7125 MHz
  • Engineered for high reliability
  • Standard frequency coordination practices generally apply (TIA TSB-10)
  • Mobile ENG – Portable Cameras and News Trucks
  • Most 6425-6525 MHz – Nationwide
  • 6875-7125 MHz – Used in many large urban markets
  • See WT Docket 10-153 Order, August 9, 2011, para 20 and 23
  • Typical Power levels: 0.01 to 0.5 watts
  • Portable camera uses can be indoors or outdoors
  • No database of ENG operations
  • Operation is generally based on “home channel” plans
  • On-site, near real-time coordination used at large events

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SLIDE 3

Visli link k Camera mera Back 6 G GHz Hz Transm nsmit itter er

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SLIDE 4

Temporar porary y Fixed ed Link (74.2 .24) 4)

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SLIDE 5

Broadcast Sites Have High RF “Visibility”

Empire State Building South Mountain (Phoenix)

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SLIDE 6

Alion

  • n Repor
  • rt
  • Three mobile use cases:
  • Indoor portable camera
  • Outdoor portable camera
  • ENG truck to central receive site
  • RLANs checked for LOS
  • Only LOS IX cases considered
  • Indoor RLANs (95%), incl. bldg. loss
  • Mix of plain glass and Low-e, 70/30
  • 1 RLAN/person assumed
  • 50% have 6 GHz capability
  • 10% and 0.44% TX activity factors
  • 20/40/80/160 MHz BWs
  • EIRP 0.2 W indoor; 4 W outdoor

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SLIDE 7

Assumed umed RLAN N Chara ract cteristics eristics

  • 6 GHz characteristics generally based on observed 5 GHz RLAN characteristics
  • EIRP distributions emphasize low power levels per ITU-R 5A/1065
  • Antenna elevation pattern suppresses energy at steep elevation angles per

ITU-R M.1652-1, 2019

  • Bandwidths distributed per 5A/1065, result in low probabilities of overlap

with 20 MHz ENG channel

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SLIDE 8

Building lding Entr try y Loss

  • 70% of indoor RLANs assumed in “traditional” buildings; 30% in thermally-

efficient buildings. Loss distributions per ITU-R P.2109-1 and P.2346.

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SLIDE 9

Key Result ults s – Indoor

  • or Camer

era

  • Example case:
  • ~2/3 of snapshots exceed

IX threshold of -10 dB I/N

  • ~1/2 exceed -6 dB
  • ~10% exceed +20 dB (RLAN

equal to ENG signal

  • IX due to OOBE was a significant

contributor in indoor cases

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SLIDE 10

Some me Result ults s – Outdoor door Camera mera

  • IX is a strong function of ENG truck

antenna height; 15m is typical

  • Most IX due to indoor RLANs
  • In example case, ~1/2 of indoor

RLANs were above IX threshold

  • ~1/3 above at I/N = -6 dB

ENG receiver location Rx antenna Activity (%) % Indoor RLAN

  • max. single-entry

above I/N threshold % Outdoor RLAN

  • max. single-entry

above I/N threshold % Indoor RLAN aggregate above I/N threshold % Outdoor RLAN aggregate above I/N threshold % All RLANs aggregate above I/N threshold DC ENG Truck Omni 1.5 m 10 15.6 4.2 15.7 4.2 19.2 DC ENG Truck Omni 15 m 10 38 11.9 39.2 11.9 46.6 DC ENG Truck Omni 1.5 m 0.44 DC ENG Truck Omni 15 m 0.44 2.2 0.5 2.2 0.5 2.7 PG ENG Truck Omni 1.5 m 10 0.2 0.2 0.2 0.2 0.4 PG ENG Truck Omni 15 m 10 22.5 29.1 25.6 29.4 48.7 PG ENG Truck Omni 1.5 m 0.44 PG ENG Truck Omni 15 m 0.44 1 1.4 1 1.4 2.5 DC ENG Truck Sector 1.5 m 10 16.8 4.4 16.9 4.4 20.5 DC ENG Truck Sector 15 m 10 41.5 12.3 42.5 12.3 49.6 DC ENG Truck Sector 1.5 m 0.44 0.9 0.2 0.9 0.2 1.1 DC ENG Truck Sector 15 m 0.44 2.2 0.5 2.2 0.5 2.7 DC ENG Truck Sector 1.5 m 10 14.3 4.3 14.5 4.3 18.2 DC ENG Truck Sector 15 m 10 34.7 11.5 35.9 11.5 43.4 DC ENG Truck Sector 1.5 m 0.44 0.7 0.2 0.7 0.2 0.9 DC ENG Truck Sector 15 m 0.44 1.9 0.5 1.9 0.5 2.5 PG ENG Truck Sector 1.5 m 10 0.2 0.2 0.2 0.2 0.4 PG ENG Truck Sector 15 m 10 46.5 33.4 49.8 33.6 66.9 PG ENG Truck Sector 1.5 m 0.44 PG ENG Truck Sector 15 m 0.44 2.8 1.9 2.8 1.9 4.6 PG ENG Truck Sector 1.5 m 10 0.4 0.3 0.4 0.3 0.6 PG ENG Truck Sector 15 m 10 21.6 26.2 24.3 26.5 45.2 PG ENG Truck Sector 1.5 m 0.44 PG ENG Truck Sector 15 m 0.44 0.9 1.4 0.9 1.4 2.3

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SLIDE 11

Some me Result ults s – ENG Truck uck to Central tral Sit ite

  • Prominence of ENG Central

Receive sites means LOS at large distances

  • IX nearly certain and continuous
  • Even without outdoor RLANs

28 km (16 mi)

ENG receiver location Rx antenna Activity (%) Antenna azimuth angle (deg) % Indoor RLAN max. single- entry above I/N threshold % Outdoor RLAN max. single- entry above I/N threshold % Indoor RLAN aggregate above I/N threshold % Outdoor RLAN aggregate above I/N threshold % All RLANs aggregate above I/N threshold % of snapshots with no indoor RLAN contributor % of snapshots with no

  • utdoor

RLAN contributor % of snapshots with no RLAN contributor Cowles Mtn. ProScan 10 227 100 100 100 100 100 Cowles Mtn. ProScan 0.44 227 83.1 51.6 91.9 54.5 97.4 Cowles Mtn. ProScan 10 194 100 100 100 100 100 Cowles Mtn. ProScan 0.44 194 86.5 61.2 95.8 65.5 99.2 0.1 Cowles Mtn. ProScan 10 108 100 99.3 100 100 100 Cowles Mtn. ProScan 0.44 108 46 20.5 50.7 22.5 65 0.1

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SLIDE 12

Some me Result ults s (2) ) – ENG Truck uck to Central ntral Sit ite

  • 100% of snapshots had indoor RLAN IX above threshold
  • ~10% had indoor RLAN IX exceeding +20 dB I/N (stronger

than typical ENG signal)

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