ITUR Working Party 8D Status Update

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ITU-R Working Party 8DStatus Update

• International Civil Aviation Organization
• Regional Preparatory Group (RPG) Meeting for
  World Radiocommunication Conference 2007
  (WRC-2007), ACP Working Group B and F and NSP SSG
  Meetings.
• Bangkok, Thailand, 21-25 February 2005.

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Organization

• ITU-R
• Radiocommunication
• Study Group 8
• Mobile, radiodetermination, amateur and related
  satellite services
• Working Party 8D
• All mobile satellite services and
  radiodetermination satellite service
• (For more information see http//www.itu.int)

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8D Study Questions of Interest to Aviation

• 110-1/8 Interference to the aeronautical mobile
  satellite (R) service
• 217/8 Interference to the radionavigation
  satellite service in the ICAO global navigation
  satellite system
• 233/8 Technical and operational characteristics
  for packet network transmission in mobile
  satellite services
• 236/8 Characteristics and operational
  requirements of radionavigation-satellite service
  (space-to-Earth, space-to-space, Earth-to-space)
  systems

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8D WRC-07 Agenda Items of Interest to Aviation

• AI1.6 (part) ... to study current satellite
  frequency allocations, that will support the
  modernization of civil aviation telecommunication
  systems, taking into account Resolution 415
  (WRC-03)
• Topic of separate briefing
• AI1.17 to consider the results of ITU-R studies
  on compatibility between the fixed-satellite
  service and other services around 1.4 GHz, in
  accordance with Resolution 745 (WRC-03)
• Just need to monitor as needed to ensure
  protection of aeronautical systems

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Other Issues (1 of 4) AMS(R)S Priority and
real-time pre-emption

• Driven by migration to generic MSS allocations
• AMS(R)S spectrum requirements given priority
  (5.357A)
• Preliminary Draft New Report being developed
• Titled Determination of feasibility and
  practicality of prioritization and real-time
  pre-emptive access between different networks of
  MSS in the bands 1 525-1 559 MHz and 1 626.5-1
  660.5 MHz
• Defines terms, Identifies scenarios, Investigates
  methodologies, and Determines Feasibility
• Current draft conclusion prioritization and
  intersystem real-time pre-emption is not
  practical and unlikely to be feasible at this
  time.
• Work continues by correspondence, with goal of
  Draft New Report for next WP8D meeting
• Correspondence Group Coordinator Mr. Yoshio
  Suzuki
• (E-mail suzuki_at_jransa.or.jp)

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Other Issues (2 of 4) Working Document to guide
development of PDRRs and PDNRs concerning RNSS
characteristics

• Intended to guide development of PDRRs and PDNRs
  concerning RNSS system characteristics
• Organizational plan calls for revision of 5
  Recommendations and preparation of 2 new
  Recommendations
• Primarily reorganization and addition of new
  information
• Agreed that restructuring/revisions would all be
  addressed/adopted as a package

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Other Issues (3 of 4)Draft revision of
Recommendation ITU-R M.1642

• Methodology for determining aggregate effective
  power flux density (epfd) levels in 1164-1215 MHz
  band
• Protects ARNS systems from new RNSS
• Used in RNSS-provider coordination meetings to
  ensure aggregate limits not exceeded (5.328A,
  Resolution 609 (WRC-2003))
• Draft revision addresses non-GSO RNSS operating
  in elliptical orbits

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Other Issues (4 of 4) Draft new Report DME
Emissions into RNSS Receivers

• Intended to quantify impact of DME emissions into
  RNSS receivers in 1164-1215 MHz band.
• Draft Report sent to Study Group 8 for approval
• Draft Report contained outdated information from
  early compatibility studies (i.e., some
  assumptions proven to be too pessimistic)
• Study Group 8 agreed to send document back to
  WP8D for revision

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Draft WRC-10 Agenda Items of Interest to Aviation
(possible 8D attribution)

• AI2.3 to consider results of ITU-R studies in
  accordance with Resolution 222 (WRC-2000) to
  ensure spectrum availability and protection for
  the aeronautical mobile-satellite (R) service,
  and to take appropriate action of this subject,
  while retaining the generic allocation for the
  mobile-satellite service
• AI3.1 to review the use of the band 5091-5150
  MHz by the fixed satellite service
  (Earth-to-space) (limited to feeder links of the
  non-GSO mobile satellite service) in accordance
  with Resolution 114 (Rev. WRC-03)