1、STD*CEPT TIR 25-08 E-ENGL 1999 = 232b414 001b027 b59 T/R 25-08 E Page 1 Distribution B Recommendation T/R 25-08 (Lecce 1989, revised in Vienna 1999) PLANNING CRITERIA AND COORDINATION OF FREQUENCIES IN THE LAND MOBILE SERVICE IN THE RANGE 29.7-960 MHz Recommendation adopted by the Working Group Freq
2、uency Management “The European Conference of Postal and Telecommunications Administrations, considering that the rapid development of the land mobile service makes the problem of assigning frequencies increasingly difficult; that each new frequency assignment must be coordinated with frequencies alr
3、eady assigned in the same geographical area for use by the stations of neighbouring Administration(s); that the probability of obtaining a successful coordination diminishes rapidly as a function of the number of radio stations; that coordination is often required for frequency assignments for use d
4、istant from the border; that the difficulties encountered with this coordination depend on a great number of parameters (technical, operational or topographical); that in order to facilitate coordination and to avoid inefficient frequency usage in border areas, a large number of parameters (technica
5、l and operational) need to be standardised; that it is desirable that channelling arrangements for the land mobile services be harmonised; that use of the same type of modulation would also facilitate coordination between Administrations; that in order to reduce the risks of harmful interference and
6、 facilitating coordination, the lowest possible antenna height and the lowest possible radiated power, and wherever possible, directional antennas should normally be used; that agreements have successfully been concluded between some CEPT Administrations and some non-CEPT Administrations concerning
7、coordination of frequencies for the land mobile service; that European common frequency allocations for the range 29.7-960 MHz are given in ERC Report 25; that there are ERC Decisions and Recommendations concerning the use of frequencies in the range 29.7-960 MHZ; m) that the definitions used in thi
8、s Recommendation shall be those of Article S1 of the Radio Regulations, unless otherwise specified herein; 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 ar
9、eas, where coordination with neighbouring countries is necessary: STDoCEPT T/R 25-08 E-ENGL 1799 = 2326414 0016028 595 T/R 25-08 E Page 2 1 PROVISIONS RELATED TO OPERATING CONDITIONS AND CHOICE OF FREQUENCIES 1.1 Harmonised use of frequency bands in dflerent countries Whenever practicable the same f
10、requency bands should be allocated in the different countries for similar type of use, like Professional (Private) Mobile Radio, public mobile services, railways, life-saving services for cross-border links, etc. For this purpose, relevant ERC Decisions, which designate certain frequency bands or th
11、eir parts for some particular application or equipment standard should be used as a primary guidance for trans-national harmonisation of frequency use. 1.2 Choice of frequency band For reasons of frequency economy, frequencies in the higher bands should be utilised whenever possible, especially for
12、the networks with short range coverage areas, taking into account the nature of communications under consideration. 1.3 Shared frequencies In frontier areas, a set of frequencies may be shared between certain users in adjacent countries in order to allow for necessary cross-border communications or
13、otherwise make the most effective use of the frequency spectrum. Such shared frequencies shall be frequencies assigned in a particular region, by a bi- or multilateral agreement of Administrations concerned, to users with similar traffic conditions and using comparable equipment. The number of stati
14、ons per channel might also be coordinated in the same agreement. 1.4 Multi-channel mobile stations To the extent that efficient use of frequencies calls for the utilisation of several base stations transmitting on different frequencies rather than a single wide-area station, multi-channel mobile sta
15、tions should be preferred as well as advanced operational channel management techniques, e.g. trunked networks, radio channel access protocols, etc. TIR 25-08 E Page 3 Channel spacing 15kHz 16.25kHz(lOkHz 112.5kHz120kHz (25kHz , Value of constant “a* I 2 12.5 (4 15 18 I10 2 PROVISIONS OF A TECHNICAL
16、 NATURE 2.1 Channelling Administrations which have not yet made a definitive selection for the purpose of designating centre frequencies or who intend to change the range of centre frequencies should select centre frequencies using the following formula: FCH = Band Edge - (a x 0.00125 MHz) + (n x Ch
17、annelspacing MHz); where: a = constant, depending on the required channel spacing, see table below; n = 1,2.3,. . , - channel number; Band Edge - lower edge of allocated frequency band, MHz, e.g. 47.68, 146, 174,380.406.1, . Constant “a” should be selected from the following table: Other channel arr
18、angements may be appropriate for digital systems with channel spacing larger than 25 kHz. 2.2 Channel spacing for analogue systems The channel spacing should not exceed 25 kKz for analogue systems. 2.3 Duplex or two-frequency simplex channel separation and location of sub-bands In so far as Administ
19、rations are in a position to define the duplex separation, its values and the respective positions of the sub-bands as given in Annex 1 should be taken into consideration, noting that in some countries there are different duplex separations and channel arrangements. If possible, the frequencies of e
20、missions of base or repeater 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 borderingadjacent countries (see examples in Annex 1). 2.4 Modulation Digital and analogue modulations are permi
21、tted in accordance with relevant ERC DecisionsRecommendations and ETSI standards. T/R 25-08 E Page 4 2.5 2.6 2.7 2.8 Propagation curves The radio wave propagation curves, to be used to determine the interference field-strength, should be taken from the latest version of the relevant ITU-R Recommenda
22、tion (e.g. Recs. ITU-R P.370 and P.529). The curves, corresponding to 50% of locations/lO% of time and appropriate propagation conditions should be used. For special cases, Administrations may agree upon other curves or methods for determination of field- strength, to be used in coordination among t
23、hemselves. Correction factors For the 900 MHz band a general correction factor of (-2) dB should be applied to the value of field strength, derived from the propagation curves developed for the entire range 470-960 MHz. The following correction factors might also be used for conversion of height of
24、the receiving antennas from 10 to 3 metres: Frequency Band I 100km 29.7 - 400 MHz 1-8 dB 1-5 dB 1400-960MHz I-lOdB 1-3 dB 1 Linear interpolation should be used to determine the correction factors for intermediate distances. Effective antenna height The effective antenna height used to determine the
25、interfering field-strength is the difference between the physical height of the antenna and the average height of the terrain in the range 1 to 15 km from the transmitter in the direction of the receiving location (sampling each 250 m). If the length of the path from the transmitter to the receiver
26、is less than 15 km, then the actual distance to the receiver should only be taken into account. Permitted interference field-strength The following values of permitted interference field-strength are valid for co-channel operation for 50% of locations and 10% of time. O dB(pV/m) for frequencies betw
27、een 29.7 and 47 MHz ; 6 dB (pV/m) for frequencies between 47 and 108 MHz ; 12 dB (pV/m) for frequencies between 108 and 380MHz ; 18 dB (pV/m) for frequencies between 380 and 400 MHz ; 20 dB (pV/m) for frequencies between 400 and 606 MHz ; 26 dB (pV/m) for frequencies between 606 and 960 MHz. In case
28、s of differing centre frequencies, the permitted interference field-strength may be increased by a value, derived from diagrams in Annex 3. For special cases, Administrations may agree upon other values of permitted interference field-strength, to be used in coordination among themselves. STD.CEPT T
29、/R 25-08 E-ENGL 1979 232bYL4 00Lb03L 087 TIR 25-08 E Page 5 2.9 Network characteristics The location, the power and the antenna heights of all stations in the network should be selected in such a way that their range is confined, as far as possible, to the zone to be covered by the intended service.
30、 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 minimise the interference potential. The effective radiated power and the effective height of the ante
31、nna 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 assignments to be coordinated A transmitting frequency sha
32、ll be coordinate with the, iministration of another country if the transmitter in question produces a field strength, at the border line with that country, which at a height of 10 metres above ground level exceeds for 50% of locations and 10% of the time the maximum permitted interference field-stre
33、ngth as defined in section 2.8. 3.2 Characteristics to be exchanged When requesting coordination, the relevant characteristics of the frequency assignment(s) in question (see Annex 2) shall be forwarded to the Administration affected, unless otherwise agreed by the Administrations concerned. 3.3 Use
34、 of electronic means for exchange of information Administrations should endeavour to use whenever possible electronic means and media for exchange of coordination information. For this purpose, documents (files) should be produced using the last but one version of appropriate commercially available
35、software, unless otherwise agreed by the Administrations concerned. ” u: 7 W 1 9; Y E m LL 2 E O Q o .- v) I E O O r. W 8 W m IL Y H O O Q) -. 9 STD.CEPT TIR 25-08 E-ENGL L777 232b11L4 00Lb033 752 :olumn A 2 IA IB TIR 25-08 E Page 7 Characteristic Number of Characters Remarks XXXXX,XXXXX k Assigned
36、frequency M Units: k, M Frequency category X According to Appendix 1 Class of station xx Nature of service xx Use codes from Table 6A1 of the Preface to IFL Use codes from Table 6B 1 of the Preface to IR, Annex 2 SCHEDULE OF INFORMATION NECESSARY FOR COORDINATION OF FREQUENCY ASSIGNMENT IZ I Categor
37、y of use I According to codes in Appendix 2 I IC I IC BB1 B2 1 OB 9A 9B 92 9D 9G 9Y 9XH 5A sc ise of the transmitter site minutes and seconds Normal hours of operation I xxxx xxxx Or HN HT Hours of first and last use of the frequency I Administrations rmation IS associate The separators (i.) and com
38、mas are shown in ihe table to improve understanding. otherwise they are not required. T/R 25-08 E Page 8 5F IY 132 13Y - of the receiving station 15 characters seconds - of the centre of reception area Obligatory for mobile receiving stations In kilometres Radius of reception area xxxxx Obligatory f
39、or mobile receiving stations Reception frequency XXXXX,XXXXX M Unites: k, M Observations 156- character field Free Status of coordination X According to codes in Appendix 4 15 characters k STDeCEPT T/R 25-08 E-ENGL 1999 = 232b4L4 00Lb035 725 T/R 25-08 E Page 9 Appendix 1 to Annex 2 COLUMN 1Z FREQUEN
40、CY CATEGORIES 1 Preferential frequencies 2 Frequencies requiring coordination 3 Frequencies used on the basis of geographical network plans 4 Frequencies for planned radiocommunications networks 5 Shared frequencies Preferential frequencies Frequencies which can be assigned by concerned Administrati
41、ons, without prior coordination, on the basis of bi- or multilateral agreements under the terms laid down therein. Frequencies requiring coordination Those frequencies which Administrations are required to coordinate with the other Administrations affected before a station is put into service. Frequ
42、encies used on the basis of geographical network plans Frequencies assigned by Administrations on the basis of a geographical network plan prepared in advance and adopted by the Administrations concerned, taking into account the technical characteristics set out in that plan. Frequencies for planned
43、 radiocommunications networks Frequencies which the Administrations coordinate with the Administrations affected with a view to subsequent introduction of coherent networks, on the basis of the technical characteristics set out in this Recommendation. Shared frequencies Frequencies which may be shar
44、ed in adjacent border areas of neighbouring countries, without prior coordination, on the basis of bi- or multilateral agreements under the terms laid down therein. T/R 25-08 E Page 10 Appendix 2 to Annex 2 COLUMN 62: CATEGORY OF USE A Airport services B Railways (excluding mountain railways) C Dipl
45、omatic corps D Mountain railways E Production, transport and distribution of energy (electricity, gas, water) F Fire services G Military (mainly for internal use) H Radio relay networks HH Local call I Demonstration K Public transport L Subscriber installations, public mobile services, stand-by link
46、s M Navigation (in ports, on the Rhine etc) N Tests and research O Not allocated P Security services (police, customs etc) Q Entries not falling within other categories on this list (cordless microphones etc) R TV and radio broadcasting (studio, news reporting) S Rescue services ( ambulances, doctor
47、s, water and mountain rescue) T Other services provided by telecommunications Administrations U Industrial operators V Road traffic service W Taxi and car hire firms X Other private services Y Reserved specific applications, not allocated Z Other private multiple-use networks STD.CEPT TIR 25-08 E-EN
48、GL 3999 m 2326434 00Lb037 5T8 T/R 25-08 E Page 11 Append= 3 to Annex 2 COLUMN 9X: ANTENNA TYPE 1 Antenna type - Designation A seven character string, in the format YYYZZWW shall be used where: YYY ZZ WW is a three digit number representing whole degrees or a parameter “a”. is a two letter antenna ty
49、pe code. is a two digit number related to the greatest side lobe, where applicable. 1.1 Antenna type identification - two letter code ZZ Different antenna characteristics can be shown by drawing curves in a system of polar co-ordinates. The types of directional antenna used in practice can be represented by nine typical groups of diagrams. See following pages for a linear scale representation of these antennas. To identify each group, a two-letter code is used: Ellipse EA, EB, EC, DE Circle KA Lemniscate LA Cassini CA, CB, CC For an omnidirectional antenna, the designation is “O
