1、4 CEPT T/R*25-OLE m 232b414 000684b H (3 25-01 Page E 1 recommends to CEPT member Administrations, in order to reduce harmful interference in border areas: that they should endeavour to comply with the following directives when assigning frequencies to stations in the land mobile service.” Recommend
2、ation T/R 25-01 (Interlaken 1968, revised in Puerto de la Cruz 1974) CO-ORDINATION OF FREQUENCIES IN THE LAND MOBILE SERVICE IN THE 80,160 AND 460 MHz BANDS Recommendation proposed by the “Radiocommunications” Working Group T/WG 3 (R) Text of the Recommendation adopted by the “Telecommunications” Co
3、mmission : “The European Conference of Postal and Telecommunications Administrations, considering (a) that on examination of Question R13 every effort was made to achieve harmonisation of the assignment of (b) that a complete alignment of all parameters relating to the use of a given frequency is no
4、t possible at the moment, (c) that the rapid development of the land mobile service makes the problem of assigning frequencies increasingly (d) that each new frequency assignment must be Co-ordinated with frequencies already assigned in a given geographi- (e) that the probability of obtaining a succ
5、essful Co-ordination diminishes rapidly as a function of the number of (f) that a great number of these Co-ordinations must take place beyond the borders of various countries, (g) that the difficulties encountered with this Co-ordination will depend on a great number of parameters (technical, freque
6、ncies to the land mobile service in CEPT member countries, di ficul t, cal area, radio stations, operational or topographical), 1. DIRECTIVES RELATED TO OPERATING CONDITIONS 1.1. Re-utilisation of frequency bands for specific types of use in different countries With regard to the following types of
7、use at least, the frequency bands allocated in the different countries should have common (literally) “portions” which should be as extensive as possible: “The common portions/segments of the frequency bands allocated in the different countries should be as broad/extensive as possible.” Railways Pro
8、duction, transport and energy distribution companies Radio link networks Demonstration Subscriber installations, public mobile services, stand-by links Edition of September 15, 1988 - CEPT T/R*25-OLE m 232b4L4 000b847 T m TIR 25-01 E Page 2 Test and research Security services (customs, police, etc.)
9、 for cross-border links Radio broadcasting (studio, news reporting) Life-saving services (ambulances, doctors, water and mountain rescue) for cross-border links 1.2. Use of common frequencies In border areas, frequencies may be divided between the users in bordering/adjacent countries so as to be us
10、ed most effectively. A common frequency is a frequency which is assigned in a given area to users whose trafic conditions are similar and who use technically similar equipment. The number of stations used per frequency is co- ordinated between the Administrations concerned. 1.3. Use of multi-channel
11、 equipment In so far as (an) economy in the use of frequencies requires the use of several base stations with different frequencies instead of one long range station, mobile multi-channel stations should be given preference in spite of their disadvantages from the operational point of view. 2. DIREC
12、TIVES OF A TECHNICAL NATURE 2.1. Propagation curves The curves contained in Annex 1 (pages 4 and 5) may be used to determine the intensity of the interference field in ordinary cases. For all special cases (maritime propagation, etc.) interested Administrations will, by mutual agreement, determine t
13、he curves to be consulted. 2.2. Network characteristics 2.3. 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 confined, as far as possible, to the zone to be covered. Excessive antenna heights and transmitter outputs sh
14、ould be avoided by using several locations of lesser/reduced height wherever possible. To facilitate Co-ordination between Administrations, it would be advisable to adopt a single frequency simplex operation. Choice of frequency band and useful range When there are restricted zones, frequencies in t
15、he highest bands should be preferred and frequencies in the lowest bands should be preferred for long range networks. By way of illustration the following values could be used as a basis for the useful ranges: Frequency Band Useful Range 80 MHz 160 MHz approximately 20 km 460 MHz These figures are v
16、alid for relatively uneven ground. 30 km and more approximately 10 to 15 km Editian of September 15, 1988 2.4. 2.5. 2.6. 3. CEPT T/R*F25-O1E 2326414 000b848 1 = TIR 25-01 E Page 3 Use of the upper and lower bands within a dual frequency simplex or duplex operation If possible, the frequencies of emi
17、ssion of base stations should be placed in the upper band and those of mobile stations in the lower band. The same positions of upper and lower bands should be selected for bordering/adjacent countries (see examples in Annex 2 (page 6). Frequency spacing in a duplex or simplex dual frequency channel
18、 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 the sub-bands given in Annex 2 (page 6) should be taken into consideration: 160 MHz band 4.6 MHz 460 MHz band 10.0 MHz *) Amongst the various spacings
19、 used in the 80 MHz band, a spacing of 9.8 MHz is used by several countries. Channel spacing For new installations, the adjacent channel spacing should not exceed 25 kHz. 80 MHz band *I CO-ORDINATION OF FREQUENCY ASSIGNMENTS BETWEEN ADMINISTRATIONS The fundamental characteristics of which the Admini
20、stration concerned must be informed when co-ordina- tion takes place are contained in Annex 3 (page 7). Edition of September 15, 1988 232b4L4 000b849 3 ._ - CEPT T/R*K25-OLE T/R25-01 E 1 Page 4 I Annex 1 PROPAGATION CURVES FOR FREQUENCIES LOWER THAN 200 MHz Edition of September 15, 1988 CEPT T/R*25-
21、01E = 2326434 0006850 T TIR 25-01 E Page 5 Annex 1 (continued) PROPAGATION CURVES FOR FREQUENCIES ABOVE 400 MHz Edition of September IS, IYXX CEPT T/R*ZS-IE m 232b4I4 000b851 I m TIR 25-01 E I Page6 Annex 2 DUPLEX SPACING AND USE AND LOCATION OF UPPER AND LOWER BANDS 6 i! E 2 - m u. z O Edition of S
22、eptember 15, 1988 1. - CEPT T/R*25-01E 2326414 000b852 3 TIR 25-01 E Page 7 Annex 3 CO-ORDINATION OF FREQUENCY ASSIGNMENTS FOR STATIONS IN THE VHF/UHF LAND MOBILE SERVICE Column I) Assigned frequency (MHz). 2c) 4a) Name of transmitting station. 4b) Country in which the transmitting station is locate
23、d. 4c) Geographical details of the position of the transmitter (longitude and latitude) in degrees and minutes. sa) Locality (localities) or zone(s) with which communication is established. 5b) Maximum range of transmission required (in km). 6) Class of the station and nature of service provided. 7)
24、 Class of emission, necessary bandwidth and nature of transmission. 8) Maximum effective radiated power (in W). 9a) Azimuth of maximum radiation (symbol ND if antenna is non-directional). 9d) Maximum effective height of the transmitting antenna in accordance with CCIR Recommendations. 10) Hours of t
25、he day during which the station is ready for operation (one only of the following abbreviations should be used: H24, HX, HX, HJ or HN). 13c) Further information if necessary such as: (a) Group of users to whom the frequency is assigned (symbols, see Appendix I (page 8). (b) Protection code (symbols,
26、 see Appendix I (page 8). Indications given under (a) and (b) may be inserted in column 6 or 13c. (c) All further information concerning the height of the antenna, a reduction in the height of the antenna in the direction of the country likely to be affected, radiated diagrams, etc., necessary to be
27、 able to assess the probability of harmful interference. Planned date for bringing into use. O (d) Limitation of radiated power in the direction of a country likely to be affected. (e) Approximate number of mobile stations located in a single network and operating on the same frequency The above-men
28、tioned points are numbered to correspond to the numbers of the columns of the ITU international list of frequencies. The same applies to the abbreviations used in column 10. Notes: I) Occasional, relatively regular use. I) Occasional, irregular use. These two definitions do not correspond with Appen
29、dix 10 to the Radio Regulations, Geneva 1959. (only if possible) and, where appropriate, the call-sign or other means of identification. O Edition of September 15, 1988 CEPT T/R*25-01E 2326414 0006853 5 TfR25-01 E Page 8 A B C D E F G H HH I K L M N O P Q R S T U V W X Y Z Appendix I to Annex 3 FURT
30、HER INDICATIONS ACCORDING TO THE TYPE OF USE (for col. 6 or 13c) Air navigation, air safety. Railways (excluding mountain railways). Diplomatic corps. Mountain railways. Production, transport and energy distribution (electricity, gas, water) firms. Fire services. Military (mainly for internal use).
31、Radio relay networks. Local call. Demonstration. Public transport companies. Subscriber installations, public mobile services, stand-by links. Navigation (in ports, on the Rhine, etc.). Tests and research. Security services (police, customs, etc.). Entries not falling within other categories on this
32、 list (cordless microphones, etc.). Radio broadcasting (studio, news reporting). Rescue services (ambulances, doctors, water and mountain rescue). Other services provided by telecommunications Administrations. Industrial operators. Road traffic service. Taxi and car hire firms. Other private service
33、s. Reserved specific application, not allocated. Other private multiple use networks. Protection Code: 1 Highly sensitive to interference. 2 Highly sensitive to interference, automatic. 3 Sensitive to interference. 4 Not very sensitive to interference. 5 Not at all sensitive to interference. Edition
34、 of September 15, 1988 CEPT T/R*25-01E 232bq3q 000b854 7 Recommandation T/R 25-01 (rvise en 1974) / Recommendation T/R 25-01 (revised in 1974) Information de la suite donne / Information regarding implementation a = La Recommandation est applique. 1 The Recommendation has been implemented. b = Lappl
35、ication de la Recommandation est prvue. 1 Implementation of the Recommendation is planned. c = Lapplication de la Recommandation nest pas prvue. 1 Implementation of the Recommendation is not planned. - No No. 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Pays Countries 2 All
36、emagne Rip. fd. d)/ Germany (Fed. Rep. of) Austria Belgium Autriche Belgique Chypre 1 Cyprus Danemark 1 Denmark Espagne 1 Spain Finlande / Finland France Grce 1 Greece Irlande Ireland Islande 1 Iceland Italie 1 Italy Liechtenstein Luxembourg Malte / Malta Monaco Norvge 1 Norway Pays-Bas / Netherland
37、s Portugal Royaume-Uni 1 United Kingdom Saint-Marin / San Marino Sude 1 Sweden Suisse / Switzerland Turquie 1 Turkey Vatican (Cit) / City) Yougoslavie / Yugoslavia Infor- mation 3 a a a a b C d a b a b a Remarques / Remarks 4 La Recommandation est applique sous les rserves suivantes : Les usagers so
38、nt classs en Belgique selon des catgories qui rpondent aux exigences de la lgislation nationale et diffrent des catgories proposes. Sauf quelques exceptions, lattribution des mmes bandes aux mmes services ou aux mmes catgories dutilisateurs nest pas essentielle sur le plan international. / Recom- me
39、ndation is applied subject to the following reservations: Users are classified in Belgium in categories which meet the requirements of the national legisla- tion and differ from the categories proposed. Apart from a few exceptions the allocation of the same bands to the same services or the same cat
40、egories of users is not essential at international level. Generally speaking the Belgian Administration does not impose frequency-sharing on users. It therefore cannot do so in the case of Belgian and foreign users. Lapplication de la Recommandation nest considre possible que dans certai- nes limites par suite du dveloppement avanc du service mobile danois. / The application of the Recommendation is only considered possible within certain limitations, as a result of the advanced development of the Danish mobile service. Edition du 15 septembre 1988 / Edition of September 15, 1988
