Transcript 3rd SADC WRC-07 MEETING 04 – 06 JUNE 2007 INDABA …

National Preparatory Working Group meeting for World
Radio-communications Conference 2015
Aeronautical Agenda Item 1.7
Presented
by
Takalani Tshikalaha
Agenda Item: 1.7
• To review the use of the frequency band 5 091 – 5 150 MHz by
the fixed satellite service (Earth-to-space) (limited to feeder
links of the non-geostationary mobile-satellite systems in the
mobile-satellite service) in accordance with Resolution 114
(Rev.WRC -12).
Relevant Resolution/s
• Resolution 114 (Rev. WRC -12) – Call for studies on
compatibility between new systems of the aeronautical radionavigation service (ARNS) and the fixed-satellite service (FSS)
(Earth-to-space) (limited to feeder links of the nongeostationary mobile-satellite service) in the frequency band 5
091 – 5 150 MHz .
Reason for Resolution 114 / Issues
• Resolves 2 states;
– that the allocation to the ARNS and the FSS in the frequency
band 5 091-5 150 MHz should be reviewed at a future
competent conference prior to 2018
– This also relates to the two date constraints in Radio
Regulation (RR) 5.444A that place limitations on the FSS. i.e.;
• after 1st January 2016, no new assignments shall be made to earth
stations providing feeder links of non-geostationary mobile-satellite
systems;
• after 1st January 2018, the FSS will become secondary to the ARNS.
(WRC-07)
• Resolves 3 states;
– that studies be undertaken on compatibility between new
systems of the ARNS and the FSS providing feeder links of the
non-GSO systems in the MSS (earth-to-space), in the band
5091 - 5150 MHz
Frequency Bands under
consideration
• 5 091 – 5 150 MHz
Summary of Relevant ITU
SG/WP Progress
• Recommendation ITU-R S.1342 – “Method for determining
coordination distances, in the 5 GHz band, between the
international standard microwave landing system (MLS) stations
operating in the ARNS and non-GSO MSS stations providing feeder
uplink services”.
• Recommendation ITU-R M.1827 – “Technical and operational
requirements for stations of the aeronautical mobile (R) service
(AM(R)S) limited to surface application at airports and for stations
of the aeronautical mobile service (AMS) limited to aeronautical
security (AS) applications in the band 5 091 - 5 150 MHz”.
Method(s) to satisfy the
agenda Item
•
•
Method A
This method proposes that the use of the frequency band 5 091-5 150 MHz by
systems of the FSS providing earth-to-space feeder links, of non-GSO systems
in the MSS:
– be maintained as a primary allocation;
– that each of the conditions on this allocation given in RR No. 5.444A, be
suppressed (i.e. after 1st January 2016 no new assignments shall be made,
and after 1st January 2018 the FSS will become secondary to the ARNS)
– that use of the band 5 091- 5 150 MHz by FSS feeder links be added to the
footnote (shall be made in accordance with Resolution 114 (Rev.WRC-12)
– that flexibility for AM(R)S be improved while ensuring protection of the
FSS.
– that coordination between FSS earth stations and ARNS ground stations is
required under certain circumstances to ensure that the ARNS is protected
from harmful interference and that RR Appendix 7 be used in determining
the coordination area, and
Preliminary SA Position
South Africa supports primary allocation of the band 5 091 – 5150
MHz by the FSS (Earth-to-space) (limited to feeder links of the
non-GSO in the mobile–satellite service) provided that ITU-R
studies show convincingly that the operation of these feeder will
not interfere with the existing microwave landing systems (MLS)
operating in the band 5 031 – 5 091 MHz.
Conclusion
 Being an internationally standardised ARNS, a MLS may use
the band 5091-5150 MHz if its requirements cannot be satisfied
in the band 5030-5091 MHz.
 In order to protect ARNS in the band 5091-5150 MHz, the RR
No. 5.444A provides that the FSS providing feeder links for
non-GSO in the MSS can use the band 5091-5150 MHz on a
primary basis prior to 1st January 2018, and will become
secondary to ARNS after 1st January 2018. Also, no new
assignments can be made to the FSS in this band after 1st
January 2016.
The end!