1、Rec. ITU-R M.1480 1 RECOMMENDATION ITU-R M. 1480* ESSENTIAL TECHNICAL REQUIREMENTS OF MOBILE EARTH STATIONS OF THE GLOBAL MOBILE PERSONAL COMMUNICATIONS BY UNDERSTANDING ARRANGEMENTS IN PARTS GEOSTATIONARY MOBILE-SATELLITE SYSTEMS THAT ARE IMPLEMENTING SATELLITE (GMPCS) - MEMORANDUM OF OF THE FREQUE
2、NCY BAND 1-3 GHz* (Question ITU-R 21 8/8) (2000) The ITU Radiocommunication Assembly, considering that various technically different global and regional GSO systems in the mobile-satellite service (MSS) are a operating and others are expected to commence operating around the beginning of the 2000s;
3、b) regulations including satisfactory type approval to an agreed Recommendation and/or technical standard; that the circulation of mobile earth stations (MESS) among administrations is usually subject to a number of 4 and regional circulation and transborder roaming for GSO MSS systems; that there i
4、s a need for identif$ng the essential technical requirements for the type approval of MES for global d) that the identification by the ITU-R of essential technical requirements for MESs operating with global and regional GSO MSS systems would provide a common technical basis for facilitating type ap
5、proval of MES terminals by various national authorities, and mutual recognition of type approvals of MES terminals, and mutual recognition arrangements for circulation of MES terminals among administrations; e) that essential technical requirements be measurable and/or testable; fl that the essentia
6、l technical requirements should achieve an acceptable balance between equipment design and production cost and the need for effective use of the RF spectrum and should be impartial with respect to all global and/or regional GSO MSS technologies, subject to the protection of other radio systems; g) t
7、hat there is a need to protect safety services fiom harmful interference, * This Recommendation should be brought to the attention of the International Civil Aviation Organization (ICAO) and the International Maritime Organization (IMO). In the case where MSS aircraft earth stations are operating in
8、 the AMS(R)S, ICAO standards and recommended practices (SARPs) applies. Applicability of ICAO SARPs to MESs that are not operating in the AMS(R)S has not been studied and therefore such MESs are not to be used on-board aircraft. Compliance with this Recommendation does not imply compliance with SARP
9、s. * Compliance with this Recommendation does not imply compliance with the IMO regulations. 2 Rec. ITU-R M.1480 considering also a that the World Telecommunication Policy Forum (WTPF-96) which addressed GMPCS issues, adopted Opinion 3, calling upon the three ITU Sectors, each within its competence,
10、 to initiate new studies or pursue current ones, and to reach conclusions as soon as practicable to facilitate the introduction of GMPCS on a global and regional basis; b) that the WTPF-96 on GMPCS issues, adopted Opinion 4, establishment of a Memorandum of Understanding (Mou) to facilitate the circ
11、ulation of GMPCS user terminals (GMPCS-Mou) which, inter alia, led to the adoption of the final texts of the GMPCS-MOU and the arrangements to facilitate the circulation of GMPCS user terminals; 4 that the identification by ITU-R of essential technical requirements for MES terminals operating with G
12、SO MSS systems would provide a common technical basis for facilitating type approval of MES terminals by various national authorities and the development of mutual recognition arrangements for type approvals of MES terminals and mutual recognition arrangements for circulation of MES terminals among
13、administrations; d) that the identification by ITU-R of essential technical requirements for MESs operating with GSO MSS in the 1-3 GHz band would help protect other radio services fiom interference caused by unwanted emissions fiom MSS MESS; e) that, for a particular GMPCS system, some MES equipmen
14、t parameters such as e.i.r.p. and necessary bandwidth which are not contained in this Recommendation, are contained in the information provided as part of the RR Appendix S4; fl that some existing GSO MSS systems may not have the capability to determine the location of the MES terminals, but it is a
15、nticipated that future GSO MSS systems that would be part of the GMPCS MOU would incorporate such capability; g) capabilities as required by the GMPCS MOU, which are not addressed in this Recommendation, that MESs of GSO MSS systems that are part of the GMPCS MOU are required to incorporate other re
16、cognizing a that existing regional MES standards covering minimum technical requirements for GSO MES in the 1-3 GHz band have evolved over many years and have been agreed by a significant number of administrations for the purpose of circulation, leading to a significant infiastructure of GSO MSS sys
17、tems and MES terminals, which have been built based on these specifications; b) that the maximum unwanted emission levels stated in Annex 1 with respect to the band 1 559-1 610 MHz have been developed for application only to MSS MESs operating in the 1-3 GHz band, and are not intended to be applied
18、to any other service without further study, noting a that this Recommendation does not cover those technical requirements covering the provision of traffic data originating in or routed to the national territory of a Member State, the identification of measures identif$ng unauthor- ized traffic flow
19、s to and fiom this Member State as well as unauthorized uses of both systems and their respective terminals on its territory, all being an integral part of the GMPCS-MOU and the ITU-R Report on WTPF-96 Opinion 5 and are prerequisites for the implementation of the GMPCS-MOU arrangements; b) all of th
20、e access methods have been considered and that further studies are necessary in this area, that the out-of-band emission levels in Annex 1 were based on technical studies of TDWFDMA systems, not recommends 1 1-3 GHz in Annex 1 should be used by administrations as a common technical basis for: a) b)
21、c) that the essential technical requirements of MESs for global and regional GSO MSS systems in the band establishing type approval requirements for MES; facilitating the licensing of MES operations; facilitating the development of mutual recognition arrangements of type approval of MES, Rec. ITU-R
22、M.1480 3 2 that the further studies mentioned in Note 8 of Table 2a and in Note 10 of Table 2b of Annex 1 be initiated expeditiously and include study of the limits for the band 1 624.5-1 626.5 MHz and these studies be conducted in time to modi this Recommendation appropriately during the next study
23、 period; 3 upper limit and requires further studies; that the threshold value of 15 c1BW reflected in Tables 2a, 2b, 3a and 3b for MES e.i.r.p. is regarded as an 4 implementing the GMPCS-MOU arrangements. that the technical requirements outlined in Annex 1 should apply only to those MESs of MSS syst
24、ems that are ANNEX 1 Essential technical requirements of MESs for global GSO MSS systems providing voice and/or data communications in the band 1-3 GHz (See Note 1) NOTE 1 - The maximum unwanted emission levels stated in this Annex with respect to the band 1 559-1 610 MHz have been developed for app
25、lication only to MSS MESs operating in the 1-3 GHz range, and are not intended to be applied to any other service without further study. 1 Scope This Annex specifies the technical requirements that apply to MESs operating in the 1 626.5-1 660.5 MHz band with the following characteristics: - - - - Th
26、e requirements have been selected to ensure an adequate level of compatibility with other radio services. The levels, however, do not cover extreme cases which may occur in any location but with a low probability of occurrence. the MESs are operating in one or more fiequency ranges of the MSS band;
27、the MESs could be either vehicle mounted or portable equipment; the MESs operate through geostationary satellites as part of a network providing voice andor data communications; the MESs operate with user bit-rates of up to 64 kbitsh. 2 Definitions For the purposes of this Annex, the following defin
28、itions apply: Carrier-offstate: An MES is in this state when either it is authorized by the network control facility to transmit but when it does not transmit any signal, or when it is not authorized by the network control facility to transmit. Carrier-on state: An MES is in this state when it is au
29、thorized by the network control facility to transmit and when it transmits a signal. Nominated bandwidth: The bandwidth of the MES RF transmission. The nominated bandwidth is wide enough to encompass all spectral elements of the transmission necessary for communication and which have a level greater
30、 than the specified unwanted emissions limits. The nominated bandwidth is wide enough to take account of the transmit carrier fiequency stability. The nominated bandwidth is within the MSS transmit fiequency band within which the MES operates. Unwanted emissions: Unwanted emissions are those falling
31、 outside the nominated bandwidth. 4 Frequency (MW 30-230 Rec. ITU-R M.1480 Quasi-peak limits (WPVW) 30 3 Requirements Carrier-on e.i.r.n limit Measurement 3.1 Unwanted emissions fiom MESS outside the band 1 626.5-1 660.5 MHZ shall be below the following limits: a) Unwanted emissions outside the band
32、 1 626.5-1 660.5 MHz The unwanted emissions over the fiequency range 30-1 O00 MHZ shall not exceed the limits in Table 1. Carrier-off e.i.r.n limit Measurement TABLE 1 1000.0-1 525.0 1525.0-1 559.0 Limits of unwanted emissions up to 1 O00 MHz in a 120 kHz measurement bandwidth at a measuring distanc
33、e of 10 m -6 1 1 O00 -77 1 O0 -6 1 1 O00 -97 1 O0 1559.0-1 600.0 1600.0-1 605.0 I 37 I 230-1 O00 I -70 1 ooo(2) -77 1 O0 -70 1 O00 -77 1 O0 The lower limit shall apply at the transition fiequency. The unwanted emissions e.i.r.p. above 1 O00 MHZ in the measurement bandwidth and in all directions shal
34、l not, according to the MES type, exceed the limits of Tables 2a or 2b, as appropriate: b) 1605.0-1 612.5 1612.5-1 616.5 TABLE 2a -70 to -58.5(3) 1 O00 -77 1 O0 -55 to -50(3) 1 O00 -77 1 O0 Limits of unwanted emissions above 1 O00 MHz and outside the band 1 626.5-1 660.5 MHz for MESS with e.i.r.p. l
35、ess than or equal to 15 dBW 1625.0-1 625.125 1625.125-1 625.8 Frequency range (MW -57.5 to -57.2(3), (4) 30 -77 1 O0 -57.2 to -50(3), (4) 30 -77 1 O0 1625.8-1 626 -50 to -47(3). (4) 30 -77 1 O0 1 O0 I I 1616.5-1 621.5 I -50 to-46(3) I 1 O00 I -77 1 O0 I -77 I 30 I I 1621.5-1 624.5 I -60 1 O0 I I 1 6
36、24.5-1 625.0 I -60 to -57.5(3), (4) I 30 I -77 Rec. ITU-R M.1480 5 e.i.r.p. limit (&W) -47 to -40(3), (4) I Measurement e.i.r.p. limit Measurement bandwidth (LIBW)(l) bandwidth (kHz1 (kHz1 30 -77 1 O0 1626-1 626.2 I -60 -60 1626.2-1 626.5 300 -77 1 O0 1 O00 -77 1 O0 I 1660.5-1 662.5 -60 -6O(% (7), (
37、8) I 1662.5-1 665.5 3 O00 -77 1 O0 3 O00 -77 1 O0 I 1665.5-1 670.5 1670.5-1 680.5 1 690.5-2 250 TABLE 2a(en4 Carrier-off I Carrier-on 1 O0 I -77 I 30 I -60 1 O0 I 100 I -77 I -60 (1 Peak-hold measurement techniques should be used in the bands 1000-1 525 MHz and 1559-1 626.5 MHz and fiom 1662.5- (2)
38、In the sub-band 1573.42-1 580.42 MHz, the average measurement time is 20 ms. (3) Linearly interpolated (LIBW) versus fiequency. (4) The power limits specified in Table 2a in the 1624.5-1 626.5 MHz band require further study. This study is important to (5) The unwanted emissions in that fiequency ran
39、ge are limited by 0 3.2. 12 750 MHz. These values should be at or below the values for the carrier-on state. determine whether less stringent limits may enhance spectrum efficiency and utilization immediately above 1 626.5 MHz. In the band 3 263.0-3 321.0 MHz the maximum e.i.r.p. in one, and only on
40、e, 300 kHz measurement bandwidth shall not exceed -38 LIBW. Elsewhere in this band the power limit in Table 2a shall be applied. (7) In each of the bands 4 894.54 981.5 MHz, 6 526.0-6 642.0 MHz and 8 175.5-8 302.5 MHz the maximum e.i.r.p. in one, and only one, 300 kHz measurement bandwidth shall not
41、 exceed -48 LIBW. Elsewhere in this band the power limit in Table 2a shall be applied. In the band 9 789.0-9 963.0 MHz the maximum e.i.r.p. in one, and only one, 300 kHz measurement bandwidth shall not exceed -59 LIBW. Elsewhere in this band the power limit in Table 2a shall be applied. 6 Carrier-on
42、 e.i.r.p. limit Measurement Frequency range bandwidth (kHz1 (&W) (MHz) Rec. ITU-R M.1480 Carrier-off e.i.r.p. limit Measurement (dBW)(l) bandwidth (kHz1 TABLE 2b 1600.0-1 605.0 1605.0-1 610.0 1610.0-1 621.5 1621.5-1 624.5 1624.5-1 625.0 1625.0-1 625.125 1625.125-1 625.8 1625.8-1 626.0 Limits of unwa
43、nted emissions above 1 O00 MHz and outside the band 1 626.5-1 660.5 MHz for MESS with e.i.r.p. greater than 15 dBW -70 1 O00 -77 1 O0 (2) 1 O00 (3) 1 O00 -46(2) 1 O00 -72 1 O0 -46 to -40(4) 1 O00 -72 1 O0 -60 to -57.5(4), (51, (6) 30 -72 1 O0 -57.5 to -57.2(4), (51, (6) 30 -72 1 O0 -57.2 to -50(4),
44、(51, (6) 30 -72 1 O0 -50 to -47(4). (51, (6) 30 -72 1 O0 1 690.0-3 400.0 3 400-10 700 I 1000.0-1 525.0 I -6 1 I 1 O00 I -72 I 1 O0 -6 1(8) 1 O00 -72 1 O0 -55(9). (10) 1 O00 -72 1 O0 I 1525.0-1 559.0 I -6 1 I 1 O00 I -103 I 3 I 1559.0-1 600.0 I -70 I 1 O00 I -77 I 1 O0 I 1 626.0-1 626.2 I -47 to -40(
45、4), (5), I 30 I -72 I 1 O0 I 1 626.2-1 626.5 I -40(5),(6) I 30 I -72 I 1 O0 I 1626.5-1 660.5 I (7) I (7) I (7) I (7) I 1660.5-1 662.5 I (7) I (7) I (7) I (7) I 1662.5-1 690.0 I -36 I 1 O00 I -72 I 1 O0 I 10 700-12 750 I -49 I 1 O00 I -76 I 1 O0 Peak-hold measurement techniques should be used in the
46、bands 1000-1 525 MHz and 1559-1 624.5 MHz and from 1662.5- 12 750 MHz. These values should be at or below the values for the carrier-on state. Linearly interpolated from -70 dE%(W/MHz) at 1 605.0 MHz to -46 dE%(W/MHz) at 1 610.0 MHz. The Russian Federation states that a level of-70 dE%(W/MHz) in the
47、 band 1 605-1 610 MHz and a linear interpolation between -70 dE%(W/MHz) at 1 610 MHz and -36 dE%(W/MHz) at 1 615 MHz shall be used to provide protection of GLONASS receiver operations. Linearly interpolated from -70 dE%(W/MHz) at 1 605.0 MHz to -62 dE%(W/MHz) at 1 610.0 MHz. Linearly interpolated (L
48、IBW) versus frequency. The maximum e.i.r.p as specified in Table 2b may be exceeded in the 1624.5-1 626.5 MHz band in a maximum of four separated 30 kHz measurement bandwidths. The upper limit for this excess power for any of these 30 kHz measurement bandwidths shall be 5 dE3 above the power limits
49、defined in Table 2b. The total excess power from these four measurements should not exceed by 8 dB. Any two of the 30 kHz measurements bandwidths that exceed the power limits defined in Table 2b shall be separated by at least one 30 kHz measurement bandwidth compliant with the power limits defined in Table 2b. The power limits specified in Table 2b in the 1 624.5-1 626.5 MHz band are set at the minimum level based on Table 2a. These limits require further study. This study is important to determine whether less stringent limits may enhance spectrum efficiency and utilization immediately
