1、 Report ITU-R M.2206(11/2010)Sharing between the aeronautical mobile service and the fixed service in the band 37-38 GHzM SeriesMobile, radiodetermination, amateurand related satellite servicesii Rep. ITU-R M.2206 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitabl
2、e, efficient and economical use of the radio-frequency spectrum by all radiocommunication services, including satellite services, and carry out studies without limit of frequency range on the basis of which Recommendations are adopted. The regulatory and policy functions of the Radiocommunication Se
3、ctor are performed by World and Regional Radiocommunication Conferences and Radiocommunication Assemblies supported by Study Groups. Policy on Intellectual Property Right (IPR) ITU-R policy on IPR is described in the Common Patent Policy for ITU-T/ITU-R/ISO/IEC referenced in Annex 1 of Resolution IT
4、U-R 1. Forms to be used for the submission of patent statements and licensing declarations by patent holders are available from http:/www.itu.int/ITU-R/go/patents/en where the Guidelines for Implementation of the Common Patent Policy for ITU-T/ITU-R/ISO/IEC and the ITU-R patent information database
5、can also be found. Series of ITU-R Reports (Also available online at http:/www.itu.int/publ/R-REP/en) Series Title BO Satellite delivery BR Recording for production, archival and play-out; film for television BS Broadcasting service (sound) BT Broadcasting service (television) F Fixed service M Mobi
6、le, radiodetermination, amateur and related satellite services P Radiowave propagation RA Radio astronomy RS Remote sensing systems S Fixed-satellite service SA Space applications and meteorology SF Frequency sharing and coordination between fixed-satellite and fixed service systems SM Spectrum mana
7、gement Note: This ITU-R Report was approved in English by the Study Group under the procedure detailed in Resolution ITU-R 1. Electronic Publication Geneva, 2011 ITU 2011 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without written permission of ITU. R
8、ep. ITU-R M.2206 1 REPORT ITU-R M.2206 Sharing between the aeronautical mobile service and the fixed service in the band 37-38 GHz (2010) TABLE OF CONTENTS Page 1 Introduction 2 2 P-P FS system characteristics . 3 3 Deployment of FS stations in the 38 GHz band in one country . 4 4 Determination of a
9、n AMS pfd mask for the protection of FS 4 4.1 Existing mask in RR Article 21 4 4.2 Dynamic analysis 6 4.3 Definition of a “combined” pfd mask FS/SRS . 9 4.4 FS short-term criterion 10 4.5 Protection of point-to-multipoint FS systems . 10 5 Impact of the FS on AMS receivers . 11 5.1 Aeronautical mobi
10、le service parameters . 11 5.2 Simulation parameters 12 6 Conclusion 14 Objective This Report gives the results of sharing studies between the aeronautical mobile service and the fixed service in the band 37-38 GHz performed under the framework of WRC-12 Agenda item 1.121. 1This Report will be revie
11、wed following WRC-12. 2 Rep. ITU-R M.2206 Abbreviations AMS Aeronautical mobile service FDMA Frequency-division multiple access FDP Fractional degradation in performance FS Fixed service FSS Fixed-satellite service GSO Geostationary satellite orbit HDFS High density applications in the fixed service
12、 MSS Mobile-satellite service P-MP Point-to-multipoint P-P Point-to-point SRS Space research service WAIC Wireless avionics intra-aircraft communications References Recommendation ITU-R F.758 Considerations in the development of criteria for sharing between the terrestrial fixed service and other se
13、rvices Recommendation ITU-R F.1245 Mathematical model of average radiation patterns for line-of-sight point-to-point radio-relay system antennas for use in certain coordination studies and interference assessment in the frequency range from 1 GHz to about 70 GHz Recommendation ITU-R F.1094 Maximum a
14、llowable error performance and availability degradations to digital fixed wireless systems arising from radio interference from emissions and radiations from other sources 1 Introduction WRC-12 Agenda item 1.12 deals with the protection of primary services in the band 37-38 GHz from interference res
15、ulting from aeronautical mobile service operations, taking into account the results of ITU-R studies, in accordance with Resolution 754 (WRC-07). This Resolution resolves 1 to invite ITU-R to conduct appropriate studies involving the aeronautical mobile service and the affected primary services in t
16、he band 37-38 GHz in order to determine the compatibility of the aeronautical mobile service with these other services; 2 to invite WRC-12 to review the results of the studies under resolves 1 and consider the inclusion of any appropriate compatibility criteria within the Radio Regulations (RR) or a
17、ppropriate modifications to the Table of Frequency Allocations. This Report analyses the protection of FS station receivers from interference that may occur from aircraft station transmitters operating under the mobile service primary allocation. The paper essentially addresses the case of point-to-
18、point (P-P) FS stations. However, it is expected that the pfd mask derived for the protection of P-P systems will also cover the protection of point-to-multipoint (P-MP) systems central and customer stations. Rep. ITU-R M.2206 3 The impact of a high density of FS stations on current AMS receivers is
19、 also analyzed. 2 P-P FS system characteristics The characteristics of FS systems are provided in Recommendation ITU-R F.758-4 and reproduced in Table 1. The pfd level corresponding to the FS nominal long-term interference spectral density given in the tables of Recommendation ITU-R F.758-4 may be e
20、xpressed as follows: +=4log102GLIpfd (1) where: I : protection criterion of the FS station (dBW/MHz) L : feeder loss (dB) G : antenna gain towards the AMS station (dBi) : wavelength (m). This equation may be directly used to determine the worst case in terms of susceptibility to interference between
21、 all P-P FS systems. Using Recommendation ITU-R F.1245 for the antenna pattern of the FS station, the worst cases may be determined using the long-term criterion at the horizon and at the zenith. In the first case, the antenna gain G is the maximum antenna gain of the FS station. In the second case
22、the antenna gain G equals 13 dBi. The worst case is taken into account in the following analyses and is reproduced in Table 1. TABLE 1 Worst-case P-P FS characteristics Channel spacing (MHz) 3.5 7 28 Antenna gain (maximum) (dBi) 47 47 47 Feeder/multiplexer loss (minimum) (dB) 0 0 0 Antenna type Dish
23、 Dish Dish Maximum Tx output power (dBW) 15 15 15 e.i.r.p. (maximum) (dBW) 32 32 32 Receiver IF bandwidth (MHz) 3.5 7 28 Receiver noise figure (dB) 7.5 7.5 7.5 Receiver thermal noise (dBW) 132.5 129.5 123.5 Nominal long-term interference (dBW) 142.5 139.5 133.5 Spectral density (dB(W/MHz) 147.9 148.
24、0 148.0 Corresponding pfd at the horizon (dBW/m2/MHz) 142.0 142.0 142.0 Corresponding pfd at zenith (dBW/m2/MHz) 82.0 82.0 82.0 4 Rep. ITU-R M.2206 These systems also correspond to the worst case in terms of e.i.r.p. and impact on the AMS. In addition to the nominal long-term interference criterion
25、given in this table, which is associated with a percentage of time of 20%, it is proposed to retain a short-term criterion based on I/N of +10 dB associated with a percentage of time of 0.013% based on Recommendation ITU-R F.1606. It should be noted that the corresponding pfd given in the table are
26、not to be used as such for the definition of a pfd mask, since they are associated with a percentage of time of 20%. 3 Deployment of FS stations in the 38 GHz band in one country The 38 GHz band, together with the 23 GHz band, are extensively used for the capillary network linking the mobile network
27、 base stations to the high-capacity fixed links in the lower bands or fibre optic networks. The result is a very large number of small star networks using the 23 GHz and 38 GHz bands, the former for the longer links, and the latter for the shorter links. The total number of stations deployed in the
28、38 GHz band is 15 792 stations (used in 7 896 links)2, which shows the importance of the deployment. 11 864 of these stations are deployed in the 37-38 GHz band. Information was received from one single operator that about 4 200 of his stations use two different blocks of 28 MHz (56 MHz total). Tabl
29、e 2 gives the distribution of elevation angles of FS stations deployed in the band 37-39.5 GHz in one country. TABLE 2 Elevation angle distribution for fixed service stations in the 38 GHz band in one country Elevation angle (degrees) Number of stations Percentage of stations in the band (%) 0 and b
30、elow 7 860 49.77 0-5 7 509 47.545-10 279 1.7610-15 95 0.60 15-20 29 0.1820-25 12 0.07525-30 4 0.025 30-90 0.0254 Determination of an AMS pfd mask for the protection of FS 4.1 Existing mask in RR Article 21 RR Article 21 gives, for the 37-38 GHz band, a pfd mask for the protection of the fixed servic
31、e from GSO and non-GSO FSS, MSS and SRS satellites. The pfd mask related to non-GSO satellites is reproduced in Fig. 2. 2Similar high density deployments are typical in other countries. Rep. ITU-R M.2206 5 FIGURE 1 Distribution of FS stations elevation angles in one country at 38 GHz FIGURE 2 RR Art
32、icle 21 pfd mask related to non-GSO satellite in the band 37-38 GHz 010002000300040005000600070008000900010203040506070Elevation angle ()Numberofstations6 Rep. ITU-R M.2206 It is proposed to retain as a tentative the same pfd mask for the protection of FS from AMS. As this mask relates to the power
33、flux-density that would be obtained assuming free-space loss, an additional attenuation due to atmospheric loss factors will be added in the dynamic simulation. 4.2 Dynamic analysis It is necessary to verify that the mask defined in 4.1 is sufficient to protect the fixed service from harmful interfe
34、rence from AMS, in particular for the long term through a dynamic simulation. This is done through the same kind of simulation that was used for the AMSS at 14 GHz before 2003. In particular, the air-traffic assumptions are the same as in the sharing study between AMSS and FS and between AMSS and RA
35、S before 2003. Fifty aircraft are deployed on air routes above the territory of France. Their altitude is either 1 000, 5 000 or 10 000 m, and their speed 800 km/h. Figure 3 shows the air routes simulated. FIGURE 3 Air routes considered for simulation Two hundred and twenty-five FS stations are then
36、 deployed for each half degree of longitude and latitude between 1 and 6 of longitude and 43 and 50 of latitude. The FS station elevation angle is fixed (either 0.5 or 10). The azimuth pointing angle is random with a uniform distribution. The maximum antenna gain is 47 dBi and the antenna pattern us
37、ed follows Recommendation ITU-R F.1245. The fractional degradation of performance (FDP) parameter is then calculated over one hour with a time step of one second while the aircraft are moving over the air routes. The results are given in Table 3 for the 225 stations pointing at an elevation angle of
38、 0, Table 4 for the 225 stations pointing at an elevation angle of 5 and in Table 5 for an elevation angle of 10. -4 -2 0 2 4 6 84243444546474849505152Rep. ITU-R M.2206 7 TABLE 3 FDP values obtained for the 64 FS stations (in percentage) for the elevation 0 0.00 0.00 0.03 0.01 0.02 0.01 0.00 0.02 0.
39、02 0.02 0.02 0.00 0.00 0.01 0.00 0.01 0.01 0.00 0.02 0.01 0.00 0.01 0.01 0.01 0.02 0.03 0.03 0.01 0.02 0.00 0.03 0.01 0.01 0.02 0.03 0.01 0.00 0.00 0.00 0.04 0.04 0.04 0.01 0.03 0.00 0.00 0.01 0.01 0.02 0.01 0.01 0.01 0.02 0.02 0.01 0.02 0.02 0.01 0.04 0.02 0.01 0.01 0.01 0.02 0.01 0.02 0.03 0.02 0.
40、02 0.02 0.04 0.06 0.03 0.00 0.02 0.01 0.02 0.02 0.02 0.01 0.02 0.01 0.03 0.02 0.06 0.03 0.03 0.04 0.02 0.03 0.00 0.01 0.01 0.03 0.02 0.01 0.01 0.02 0.03 0.01 0.03 0.05 0.03 0.02 0.02 0.00 0.01 0.03 0.01 0.02 0.01 0.02 0.04 0.02 0.02 0.04 0.04 0.02 0.05 0.19 0.00 0.02 0.01 0.02 0.02 0.02 0.04 0.04 0.
41、04 0.03 0.03 0.02 0.05 0.03 0.04 0.00 0.00 0.00 0.00 0.02 0.01 0.02 0.02 0.02 0.03 0.02 0.02 0.03 0.01 0.04 0.01 0.01 0.01 0.02 0.03 0.03 0.01 0.04 0.03 0.03 0.02 0.08 0.04 0.06 0.04 0.01 0.01 0.00 0.01 0.02 0.01 0.04 0.04 0.03 0.03 0.04 0.01 0.01 0.05 0.00 0.00 0.02 0.00 0.04 0.00 0.05 0.03 0.04 0.
42、03 0.06 0.02 0.01 0.01 0.01 0.00 0.02 0.00 0.02 0.00 0.04 0.03 0.04 0.01 0.01 0.01 0.02 0.02 0.02 0.01 0.00 0.00 0.00 0.02 0.00 0.02 0.06 0.01 0.05 0.04 0.04 0.03 0.01 0.01 0.00 0.00 TABLE 4 FDP values obtained for the 64 FS stations (in percentage) for the elevation 5 0.01 0.01 0.01 0.01 0.27 0.00
43、0.05 0.03 0.01 0.01 0.00 0.01 0.31 0.03 0.63 0.01 0.00 0.41 0.03 0.01 2.32 0.09 0.18 0.03 0.02 0.06 0.11 0.07 1.00 0.00 0.31 0.05 0.03 1.67 0.02 0.06 0.07 0.00 0.04 0.01 0.01 0.14 0.00 0.29 0.97 0.79 0.05 0.10 1.16 0.03 0.04 0.22 0.01 0.05 0.39 0.06 0.03 0.31 0.14 0.58 0.00 0.01 0.02 0.01 0.02 0.39
44、0.64 0.02 0.08 0.07 0.02 0.03 0.01 0.01 0.02 0.75 0.05 0.02 0.05 0.05 0.01 0.01 0.01 0.04 0.00 0.08 0.05 0.04 0.17 0.13 0.02 0.08 0.02 0.49 1.18 0.03 0.01 0.52 0.22 0.12 0.26 0.08 0.12 0.01 0.64 0.00 0.48 0.00 0.02 0.00 0.18 0.00 0.06 0.03 0.01 0.35 0.11 0.15 0.07 0.10 0.00 0.04 0.01 0.09 0.03 0.03
45、0.02 0.19 0.02 0.08 0.74 0.86 0.10 0.02 0.01 0.00 0.00 0.01 0.02 0.04 0.01 0.06 0.14 0.05 0.36 0.12 0.04 0.02 0.10 0.64 0.01 0.00 0.03 0.42 2.66 0.06 1.60 0.08 0.01 0.02 0.52 1.37 0.89 1.42 0.00 0.01 0.00 0.07 0.01 0.10 0.03 0.52 0.06 0.04 0.70 0.03 0.26 0.01 0.07 0.20 0.00 0.01 0.00 0.08 0.02 0.02
46、0.35 0.06 0.83 0.02 0.29 0.09 0.06 0.04 0.07 0.00 0.00 0.00 0.00 0.03 0.02 0.03 0.03 0.18 0.84 0.13 0.24 0.04 0.02 0.00 0.00 0.00 0.01 0.04 0.00 0.37 0.01 0.05 0.01 0.00 0.22 0.09 0.00 0.00 0.00 8 Rep. ITU-R M.2206 TABLE 5 FDP values obtained for the 225 FS stations (in percentage) for the elevation
47、 10 0.00 0.01 0.01 0.05 0.06 1.29 0.04 0.00 0.02 0.01 0.29 0.17 0.00 0.00 0.00 0.00 0.02 0.03 0.01 0.02 0.01 0.03 0.00 0.06 0.05 0.01 0.22 0.00 0.09 0.00 0.01 0.03 0.08 0.02 2.86 0.02 0.00 0.01 0.01 0.00 0.01 0.01 0.01 0.01 0.02 0.00 0.02 0.00 0.03 0.01 0.01 0.43 0.01 0.02 0.12 0.04 0.04 0.11 0.02 0
48、.00 0.00 0.03 0.13 0.34 0.01 0.03 0.02 0.03 0.01 0.02 0.04 0.05 1.78 0.21 0.03 0.00 0.00 0.01 0.01 0.00 0.02 0.01 1.81 0.01 0.08 0.08 0.67 0.02 0.06 0.08 0.00 0.01 0.06 0.04 0.00 0.01 0.10 3.22 0.01 0.31 0.03 0.10 0.02 0.05 0.48 0.00 0.01 0.04 0.05 0.06 0.01 0.01 0.03 0.05 0.08 0.06 0.03 0.18 0.03 0
49、.02 0.00 0.00 0.33 0.01 0.04 3.70 0.00 0.44 0.04 0.05 0.04 0.01 0.07 0.05 0.02 0.00 0.00 0.04 2.35 0.01 0.03 0.02 0.01 0.03 0.10 0.12 0.02 0.63 0.09 0.03 0.10 0.00 0.00 0.00 0.01 0.03 0.06 0.06 4.35 0.01 0.02 0.07 0.02 0.02 0.01 0.00 0.00 0.02 0.00 0.10 0.07 0.08 2.23 0.02 0.05 0.01 0.33 0.70 0.01 0.00 0.01 0.01 0.02 0.01 1.21 0.03 0.03 0.03 0.06 0.04 0.03 0.59 0.00 0.11 0.24 0.00 0.00 0.02 0.54 0.05 2.25 0.10 0.09 0.41 0.33 0.01 0.07 2.40 0.19 0.00 0.00 0.02 0.00 0.00 0.03 0.05 0.03 0.03 0.14 0.05 0.08 0.15 0.02 0.00 0.00 Acco
