WRC 2007 Agenda Items for WP 4A

Efficient orbit/spectrum utilization

The list below shows all the WRC 2007 Agenda Items for which this is the lead group. Click on an Agenda Item or Resolution to get more information about which Visualyse product to use and how Transfinite consultants could assist in studying this problem.

Agenda Item	Description
Agenda 1.10	This agenda item relates to work for the review of the regulatory procedures and associated technical criteria of Appendix 30B, which relates to the allotment plan for GSO FSS systems. It does not cover action on the allotments, the existing systems or the assignments in Appendix 30B.
Agenda 1.12	This agenda item relates to Plenipot Resolution 86 on "Coordination and notification procedures for satellite networks". It calls upon WRC 2007 to consider proposals to improve the regulatory procedures relating to the introduction of space services in a way that facilitates the rational, efficient, and economic use of radio frequencies and associated orbits including the GSO.
Agenda 1.19	This agenda item relates to spectrum for broadband services via satellite. A number of bands have been identified in 5.BC03 for use by high density fixed satellite service (HDFSS) applications, and it would be beneficial if there were globally harmonised spectrum. Work is therefore required to: i) identify the requirement for spectrum for these types of systems; ii) identify the preferred global harmonised bands, potentially including sharing studies with other services allocated in these bands
Resolution 4	This resolution relates to the concept of a period of validity of frequency assignments to space stations, in particular for the geostationary orbit. This would make an assignment discontinued after the expiry of the period of operation, calculated from the date the assignment was brought into service and the satellite network's design period. It calls for studies with respect to its implementation.
Resolution 114	This resolution relates to the band 5 091 - 5 150 MHz, and is the subject of an agenda item for WRC-10. It calls for studies of technical and operational issues relating to sharing in this band between new systems of the aeronautical radionavigation service and the fixed satellite service providing feeder links for non-GSO MSS.
Resolution 136	This resolution relates to frequency sharing between GSO and non-GSO FSS networks in the range 37.5 - 50.2 GHz. It calls for studies of technical, operational, and regulatory studies of sharing arrangements in time for WRC-10 including issues such as avoiding in-line events, diversity, adaptive coding, link balancing, epfd limits, and off-axis eirp limits.
Resolution 85 [COM4/6]	This resolution relates to verification that non-GSO FSS systems operating in bands for which the equivalent power flux density (EPFD) limits in article 22.2 meet the limits required. ITU-R Recommendation S.1503 to define the algorithm that should be used to verify that such non-GSO FSS systems meets the validation epfd limits. However no software has been validated and supplied to the BR, and so this resolution requests that administrations to develop such software tools.
Resolution 89 [COM4/9]	This resolution relates to the backlog in satellite filings, in particular for GSO systems. It identifies a number of areas where the process could be improved, and requests studies into the: i) development of more update to date software for the validation of electronic filings including information on the validation error messages ii) data elements, structure and database for Appendix 4 iii) development of software for the automation checking for compliance with Article 5
Resolution 140 [COM4/13]	This resolution relates to the need to develop protection criteria such as equivalent power flux density (EPFD) to protect GSO downlinks from non-GSO FSS networks operating in the bands 19.7 - 20.2 GHz.
Resolution 901 [COM4/19]	This resolution relates to the extension of the coordination arc concept applied in certain bands to those not yet covered. Table 5-1 in Appendix 5 identifies the methods by which it is determined coordination is required, and for some bands it is based upon DT/T and others the difference in longitude of GSO satellites, described as the coordination arc. This resolution calls for further study as to the applicability of the coordination arc to other bands and services not covered by the existing regulations.
Resolution 144 [COM5/15]	This resolution refers to the issue of sharing between earth stations of the fixed satellite service (Earth to space) and radiolocation stations in the band 13.75 to 14 GHz. At WRC-03 the dish size limit was reduced from 4.5m to 1.2, but a PFD at country border or coastline has been introduced of -115 dB(W/m^2) in 10 MHz not to be exceeded for more than 1% of time. Further work is required to develop ITU-R Recommendations that will establish technical or operation methods to facilitate sharing - for example allowing more flexible deployment of earth stations and that could be used during bilateral discussions between administrations.
Resolution 146 [COM6/1]	This resolution relates to changes in the C/I criteria to be 27 dB (for single entry) and 23 dB (for aggregate interference) when examining filings under Appendix 30B. It calls for further work on the regulatory procedures and associated technical criteria on Appendix 30B.
Resolution 76	Protection of GSO FSS and BSS networks from aggregate EPFD produced by multiple non-GSO FSS systems including: i) methodology for calculating aggregate EPFD ii) accurate modelling of interference from non-GSO into GSO networks; iii) procedures to be used by non-GSO operators when the aggregate EPFD limits are exceeded; iv) measures to identify the interference levels from non-GSO systems in excess of the aggregate limits.
Resolution 139	Study the technical, operational and regulatory aspects of the current and expected future use of FSS allocations for DTH TV broadcasting