1、 25-08 Page E 1 Recommendation T/R 25-08 (Lecce 1989) COORDINATION OF FREQUENCIES IN THE LAND MOBILE SERVICE IN THE RANGE 29.7-960 MHz Recommendation proposed by Working Group T/WG 15 “Radio Administration, Regulation and Frequency Management” (RARF) Text of the Recommendation adopted by the “Teleco
2、mmimications” Commission : “The European Conference of Postal and Telecommunications Administrations, consider irig a) that the rapid development of the land mobile service makes the problem of assigning frequencies increasingly difficult, b) that each new frequency assignment must be coordinated wi
3、th frequencies already assigned in the same geographi- c) that the probability of obtaining a successful coordination diminishes rapidly as a function of the number of radio d) that coordination is often required for frequency assignments for use distant from the border, e) that the difficulties enc
4、ountered with this coordination depend on a great number of parameters (technical, f) that in order to facilitate coordination and to avoid inefficient frequency usage in border areas, a large number g) that it is desirable that channelling arrangements for the land mobile services be harmonized, h)
5、 that use of the same type of modulation would also facilitate coordination between Administrations, i) that in order to reduce the risks of harmful interference and facilitating coordination, the lowest possible antenna height and the lowest possible radiated power, and wherever possible, direction
6、al antennas should normally be used, j) that agrements have successfully been concluded between some CEPT Administrations and some non-CEPT Administrations concerning coordination of frequencies for the land mobile service, k) that the CEPT Recommendation T/R 75-02 E gives the sub-bands to be used i
7、n the band 862-960 MHz, recommends that CEPT member Administrations should endeavour to comply with the following provisions when assigning frequencies to stations in the land mobile service, particularly in border areas, where coordination with neighbouring countries is necessary: cal area, station
8、s, O operational or topographical), of parameters (technical and operational) need to be standardized, O 1. 1.1. 1.2. PROVISIONS RELATED TO OPERATING CONDITIONS AND CHOICE OF FREQUENCIES Re-utilization of frequency bands for similar types of use in different countries Whenever practicable the same f
9、requency sub-bands should be allocated in the different countries for similar type of use, like public mobile services, railways, life-saving services for cross-border links, etc. Choice of frequency band and useful range For reasons of frequency economy, frequencies in the higher bands should be ut
10、ilized if a short range network is adequate, taking into account the nature of communications under consideration. The following values could be used as a basis for the useful ranges: Frequency Band Useful Range 40 MHz approximately 35 km 80 MHz approximately 25 km 160 MHz approximately 20 km 460 MH
11、z approximately 10 to 15 km 900 MHz approximately 5 to 10 km These figures are valid for relatively uneven ground. Edition of January 15, 1990 CEPT T/R*25-OB*E 861 2326434 000b905 9 M TIR 25-08 E Page 2 1.3. 1.4. 2. 2.1. 2.2. 2.3. 2.4. Shared frequencies In frontier areas, common frequencies (see Re
12、commendation T/R 21-03 E) may be shared between certain users in adjacent countries in order to make the most effective use of the frequency spectrum. Such shared frequencies shall be frequencies assigned in a particular region to users with similar trafic conditions and using technically comparable
13、 equipment. The number of stations per channel should be coordinated between the Administrations concerned. Muiti-channel mobile stations To the extent that efficient use of frequencies calls for the utilization of several base stations transmitting on different frequencies rather than a single wide
14、-range station, multi-channel mobile stations should be preferred despite the operational difficulties to which they can give rise. PROVISIONS OF A TECHNICAL NATURE (For bands I and III see also Recommendations T/R 02-01 E and T/R 25-05 E respectively.) Channelling Administrations which have not yet
15、 made a definitive selection for the purpose of designating nominal frequencies or who intend to change the range of nominal frequencies should select nominal frequencies within the ranges: 47.000 MHz + n x 12.5 kHz 68.000 MHz + n x 12.5 kHz 146.000 MHz + n x 12,5 kHz 174.000 MHz + n x 12.5 kHz 406.
16、1 MHz + n x 12.5 kHz 450.000 MHz + n x 12.5 kHz (n = 1, 2, 3, 4, .) for 12.5 kHz channel arrangements (n = 1, 3, 5, 7, .) for 25 kHz channel arrangements 862.0125 MHz + n x 25 kHz (n = O, 1, 2, 3, .) Interleaved channels in the 900 MHz band with a central frequency given by the series: 862.025 MHz +
17、 n x 25 kHz (n = O, 1, 2, 3, .) may also be used but are subject to the agreement of the Administrations affected. Other channel arrangements may be appropriate for digital systems with channel spacing larger than 25 kHz. Channel spacing The channel spacing should not exceed 25 kHz for analogue syst
18、ems. In the 900 MHz range, the channel spacing should be 25 kHz for analogue systems. Frequency spacing in a duplex or two- frequency simplex channel and location of sub-bands In so far as Administrations are in a position to define the spacing, the following values and the respective positions of t
19、he sub-bands given in Annex 2 should be taken into consideration: 160 MHz band 4.6 MHz 420 MHz band 10.0 MHz 460 MHz band 10.0 MHz 900 MHz band 45.0 MHz If possible, the frequencies of emission of base or repeater stations should be placed in the upper band and those of mobile stations in the lower
20、band, The same positions of upper and lower bands should be selected for bordering/adjacent countries (see examples in Annex 2). Modulation For analogue transmission in the land mobile service, angle modulation should be used. 80 MHz band * * Amongst the various spacings used in the 80 MHz band, a s
21、pacing of 9.8 MHz is used by several countries. Edition of January 15, 1 TIR 25-08 E Page 3 2.5. Propagation cnrves The curves contained in Annex 1 should be used to determine the interference field-strength. For special cases including sea path propagation, Administrations may agree upon other curv
22、es or determination of field-strength in the frequency band 250-400 MHz where curves do not exist. 2.6. Correction factors For the 900 MHz band a general correction factor of -2 dB should be used. The following correction factors should be used for receiving antennas from 10 to 3 metres. Frequency B
23、and 100 km 29.7-400 MHz - 8dB -5 dB 400 -960 MHz -10 dB -3 dB Linear interpolation shall be used for intermediate distance. 2.7. Effective antenna height The effective antenna height used to determine the interfering field-strength is the difference between the physical height of the antenna and the
24、 average height of the terrain. The evaluation of the average height of the terrain is subject to the agreement between Administrations. O 2.8. Permitted interference field-strength The following values of permitted interference field-strength are valid for Co-channel operation for 50% of locations
25、and 10% of time. O dB above 1 pV/m for frequencies between 29.7 and 47 MHz 6 dB above 1 pV/m for frequencies between 47 and 108 MHz 12 dB above 1 pV/m for frequencies between 108 and 400 MHz 20 dB above 1 pV/m for frequencies between 400 and 606 MHz 26 dB above 1 pV/m for frequencies between 606 and
26、 960 MHz When using different nominal frequencies, the permitted interference field-strength may be increased as indicated in Annex 4. 2.9. Network characteristics The location, the power and the antenna heights of all stations in the network must be selected in such a way that their range is conned
27、, as far as possible, to the zone to be covered. Excessive antenna heights and transmitter outputs should be avoided, by using several locations of reduced height wherever possible. In border areas directional antennas should be used in order to minimize the interference potential. The effective rad
28、iated power and the effective height of the antenna should be as low as possible in relation to the area to be served. Wherever practicable, the effective radiated power should not exceed 25 Watts. 3. PROVISIONS ON COORDINATION OF FREQUENCY ASSIGNMENTS BETWEEN ADMINISTRATIONS 3.1. Frequency assignme
29、nts to be coordinated Every frequency assignment in border areas shall be coordinated with neighbouring countries, the border area being understood as the area lying on either side of the common border of the countries concerned, such that a transmitter operating within that area produces a field-st
30、rength, at the border between the Administrations concerned, which at a height of 10 metres above ground level exceeds for 50% of locations and 10% of the time maximum permitted interference field-strength as defined in section 2.8. For the purpose of protecting receivers, a maximum permitted radiat
31、ed power of 25 Watts can be taken as the basis for evaluating the field-strength. 3.2. Characteristics to be exchanged When requesting coordination the relevant characteristics of the base station (see Annex 3) shall be forwarded to the Administration affected.” Edition of January 15, 1990 ,- CEPT T
32、/R*25-O*E 9 232b414 0006707 2 W TIR 25-08 E Page 5 Annex 1 PROPAGATION CURVES FOR FREQUENCIES BELOW 250 MHz (29.7-250 MHz) Edition of January 15, 1990 CEPT T/R*25-O*E 9 2326434 0006908 4 H TIR 25-08 E Page 6 PROPAGATION CURVES FOR FREQUENCIES ABOVE 400 MHz O a Edition of January 15, 1990.- TIR 25-08
33、 E Page 7 A 2 t- A o d s 2 h E m L .- CA - 2 2 W 2 E O oo Annex 2 DUPLEX SPACING AND USE AND LOCATION OF UPPER AND LOWER BANDS 0 Edition of January 15, 1990 s E 6 2 H 0 - m L cl E 2 t E E - 2 z 0 W d c s E IA d- m L -0 I : CEPT T/R*25-O*E 89 2326414 000b9LO 2 - TIR 25-08 E Page 9 Annex 3 SCHEDULE OF
34、 INFORMATION NECESSARY FOR COORDINATION OF FREQUENCY ASSIGNMENT Coliimn Characteristic Remarks Number of Characters (1) XXXXX,XXXXX k M G IA Assigned frequency Units: k, M or G 12 X According to Auvendix 1 Frequency category Class of station 6A xx According to codes in Amendix 2 6B Nature of service
35、 xx According to codes in Amendix 3 6Z Catenorv of use xx According to codes in Amendix 4 2c Date of bringing into use DD.MM.YY 22 Date of achieving coordination DD.MM.YY 4A Name of transmitting station or zone of use 20 characters Use abbreviations in Appendix 5 Code: LCL not permitted According to
36、 codes in Appendix 6 4B Countrv xxx O O O Geographical coordinates - of the transmitter site - of the centre of the transmitting area Radius of the transmitting area Height of transmitter site above sea level E N xxx.vxXXX/xxsxxxx 15 characters 15 characters xxxxx xxxx Longitude and latitude, in deg
37、rees, minutes and seconds 4c -4D 42 In kilometres In metres IA Designation of emission See RR Article 4 and RR Amendix 6 xxxxxxxxx 7 obligatory + 2 optional E for e.r.p. *XXX,X I for e.i.r.p. 8B1 e.r.u. or e.i.r.u. of the base station In dBW 8B2 e.r.D. or e.i.r.u. of the mobile station HJ XXXXXXXX o
38、r HN HT HX Hours of first and last use of the fre- quency 1 OB Normal hours of operation 9A Azimuth of maximum gain of the antenna XXX,X or ND f xxxx/xxx fXXXX In metres Obligatory according to agreements between Administrations Optionally 12 effective heights in 12 predetermined directions (O:, 30,
39、 60, etc.) According to codes in Atmendix I Maximum effective height and azimuth in the direction of the neighbouring country affected 92 9D Polarization xx 9G Gain in the direction of maximum radiation In dB - This information is associated with radiated power (column 8B1-8B2) In metres - Degrees -
40、 Diagram type (2 letters) - No definition (2 numbers) See column 4A xx,x xxxx xxx/xx/xx 9Y Height of the antenna above the ground Antenna type according to Appendix 8 9x 5A Name of receiving station or area of reception Geographical coordinates - of the receiving station - of the centre of reception
41、 area Radius of reception area 20 characters E N xxxwxxxx/xxsxxxx 15 characters 15 characters Longitude and latitude in degrees, min- utes and seconds 5c 5F XXXXX In kilometres Obligatory for mobile receiving sta- tions Reception frequency k XXXXX,XXXXX M G Units: k, M or G 1Y - 156- character field
42、 X 132 Observations Free According to codes in Appendix 9 13Y Status of coordination (1) The separators (I.) and commas are shown in the table to improve understanding, otherwise they are not required. -i_ Edition of January 15, 1990 I-. CEPT T/R*25-O*E 89 232b414 0006911 4 TIR 25-08 E Page 10 Appen
43、dix 1 to Annex 3 COLUMN 1Z: FREQUENCY CATEGORIES 1 Preferential frequencies 2 Frequencies requiring coordination 3 Frequencies belonging to a geographical network plan 4 Frequencies intended for a planned radiocommunications network 5 Shared frequencies Preferential frequencies Frequencies which can
44、 be assigned by Administrations without prior coordination provided the range of the inter- ference signal does not exceed that from a transmitter with technical characteristics fixed by prior agreement. Frequencies requiring coordination Those frequencies which Administrations are required to coord
45、inate with the other Administrations concerned before a station is put into service. Frequencies belonging to a geographical network plan Frequencies assigned by Administrations on the basis of a geographical network plan prepared in advance and adopted by the Administrations concerned, taking into
46、account the technical characteristics set out in that plan. Frequencies intended for a planned radiocommimicatiois network Frequencies which the Administrations have coordinated at an early date with the Administrations concerned with a view to subsequent introduction of coherent networks on the bas
47、is of the technical characteristics set out in this Recommendation. Shared frequencies In frontier areas, common frequencies (see Recommendation TIR 21-03 E) may be shared between certain users in adjacent countries in order to make the most effective use of the frequency spectrum. Such shared frequ
48、encies shail be frequencies assigned in a particular region to users with similar trafic conditions and using technically comparable equipment. The number of stations per channel should be coordinated between the Administrations concerned. Edition of January 15, 19,90 CEPT T/R*25-O8*E 89 M 2326434 O
49、OOb912 b W TIR 25-08 E Page 11 Appendix 2 to Annex 3 COLUMN 6A: CLASS OF STATION FB Base station FC Coast station FP Port station FX Fixed station FL Land station ML Land mobile station MR Radiolocation mobile station MS Ship station PL Combination of two or more classes of station (limited to collective entries made under the terms of RR 2184) If other codes are required, use: - codes listed in Appendix 10 of the Radio Regulations; - codes listed in Table 6A1 of the Preface to the International Frequency List (IFL). Edition of January 15, 1990 - CEPT T/R*25-O*E 89 W
