ITU-R SF 1707-2005 Methods to facilitate the implementation of large numbers of earth stations in the FSS in areas where terrestrial services are also deployed《在同样配置了陆地业务的区域中FSS中便于.pdf
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1、 Rec. ITU-R SF.1707 1 RECOMMENDATION ITU-R SF.1707 Methods to facilitate the implementation of large numbers of earth stations in the FSS in areas where terrestrial services are also deployed (2005) Scope This Recommendation provides methods and means to facilitate the implementation of large number
2、s of earth stations operating in the fixed-satelllite service (FSS) in areas where terrestrial services are also deployed. It includes examples for the deployment of a large number of FSS earth stations, guidance for an agreed interference calculation to facilitate implementation of such large numbe
3、rs of earth stations, and an example of how to develop a single transmit and a single receive coordination distance for consideration as a means to ease bilateral agreements for a given geographical area. The ITU Radiocommunication Assembly, considering a) that an increasing number of fixed-satellit
4、e service (FSS) network applications, operating in certain FSS bands, plan to deploy large numbers of earth stations; b) that these FSS networks are subject to coordination under various provisions of the ITU Radio Regulations (RR); c) that in some frequency bands above 17 GHz, allocated to the FSS,
5、 administrations may consider various options to facilitate establishing FSS systems which will provide broadband services to a large number of earth stations; d) that the deployment of large numbers of FSS earth stations is most suitable in frequency bands not shared with terrestrial services in th
6、e same geographic area, but that in some bands there will be sharing between FSS earth stations and terrestrial stations in some areas; e) that there may be a need to facilitate the implementation of such services involving the coordination/registration of large numbers of FSS earth stations in area
7、s where terrestrial services are also deployed in the same frequency band; f) that a number of FSS systems with types of earth stations and characteristics other than those used by systems with large numbers of earth stations have already been brought into use or are planned to be brought into use,
8、noting a) that, in shared bands, the use of interference mitigation techniques by the fixed service (FS) and FSS may reduce the number of cases where interference between FS and FSS occurs, recommends 1 that the elements in Annex 2 may be used as guidance for an agreed interference calculation which
9、 may be used to facilitate the implementation of large numbers of earth stations and terrestrial FS stations in the same band for the cases described in Annex 1 (see Notes 1 and 2); 2 Rec. ITU-R SF.1707 2 that a single transmit and a single receive coordination distance for the case of coordination
10、of large numbers of similar earth stations (see Note 3) could be considered for use by administrations as a means to facilitate bilateral agreements for a given geographical area; 3 that the following Notes should be considered as a part of this Recommendation. NOTE 1 The examples in Annex 1 make us
11、e of databases containing technical and geographical information for FSS earth stations and FS stations, and appropriate agreed-upon interference computation programs, to allow the guidelines to be implemented. NOTE 2 In addition to the examples in Annex 1, FSS systems communicated to the Radiocommu
12、nication Bureau which have been coordinated on a site-by-site basis, with types of earth stations and characteristics other than those used by high-density systems, should also be taken into account. NOTE 3 Annex 3 provides an example of a parametric analysis using RR Appendix 7 for development of a
13、 single coordination distance applicable to a particular geographic area. The calculations use a representative set of earth station characteristics. The results of this analysis suggest that it may be possible to arrive at a single transmit and single receive coordination distance beyond which coor
14、dination between FSS earth stations and FS stations would not be required. Such a coordination distance could be used to reduce the number of calculations required under a simplified coordination methodology. The distance will vary depending on frequency, station characteristics, and the particular
15、geographic area. It is noted that administrations have to agree on earth station characteristics to be considered for each case of coordination. NOTE 4 Given that the methods considered in this Recommendation rely upon databases containing the specific locations of FS and FSS stations, this Recommen
16、dation is not meant to apply to those cases where the FS has been authorized on an area basis. Annex 1 Examples for the deployment of large numbers of FSS earth stations 1 Introduction In recent years, it has been recognized that a number of FSS systems currently being planned or developed will like
17、ly encompass a very large number of earth stations. FSS systems will find ideal conditions for deployment in bands where there is no FS allocation since in these bands no coordination between FSS earth stations and FS stations is required. However, many FSS systems are planned for deployment in band
18、s where there is an FS allocation in the ITU Table of Frequency Allocations. These FSS networks are subject to coordination under various provisions of the RR. The objective of this Annex is to provide descriptive examples of how to ease the regulatory procedures associated with the deployment of la
19、rge numbers of earth stations through a simplification in the coordination/registration process. In addition, this Annex provides an example of the methodology that can readily be adapted to different specific conditions. Three different deployments of large numbers of earth stations are addressed:
20、1. national coordination/registration; 2. coordination/registration within a bilateral agreement between two administrations; 3. international coordination/registration in accordance with the RR. Rec. ITU-R SF.1707 3 For each of these three deployments, there are two interference situations to be co
21、nsidered: interference from an FS station to a receive FSS earth station; and interference from a transmit FSS earth station to an FS station. 2 Frequency bands As noted above, the deployment of large numbers of earth stations in FSS frequency allocations can best be carried out in bands that are no
22、t shared with terrestrial services. The methodology presented here is intended to apply to bands shared with the FS, e.g. in various frequency bands allocated to the FSS. An examination of FSS allocations indicates that some are shared with terrestrial services, in particular the FS, and some alloca
23、tions are not. 2.1 Bands not shared with FS In the case where large numbers of FSS earth stations operate in bands not shared with FS these bands are still shared with other FSS systems, so FSS earth stations with other types of technical characteristics must continue to be accommodated. Since such
24、bands are not shared on a co-primary basis with FS, no issues arise with respect to individual site coordination of FSS earth stations. 2.2 Bands shared with FS It is expected that deployment of large numbers of FSS earth stations will take place in various bands shared with the FS. To deploy large
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