1、STD.CEPT ERC REPORT 57-ENGL 3999 2326414 0033453 bT2 ERC REPORT 57 European Radiocommunications Committee (ERC) within the European Conference of Postal and Telecommunications Administrations (CEPT) DSI PHASE II (900 MHz ISSUES) ANALOGUE PUBLIC MOBILE NETWORKS Saariselk, January 1998 STD-CEPT ERC RE
2、PORT 57-ENGL 1999 m 232b4l14 0013454 539 m Copyright 1998 the European Conference of Postal and Telecommunications Administrations (CEPT) STD.CEPT ERC REPORT 57-ENGL 3999 = 2326414 0013455 475 ERC REPORT 57 DSI PHASE II (900 MHz ISSUES) ANALOGUE PUBLIC MOBILE NETWORKS SUMMARY . 1 INTRODUCTION 3 STUD
3、Y . 4 MINIMUM FREQUENCY SEPARATIONS . MHZ 5 CONCLUSIONS . 5 ANNEX 1 DEFINITIONS OF TERMS USED IN THIS REPORT 7 STD-CEPT ERC REPORT 57-ENGL 1999 = 2326414 0033456 301 ERC REPORT 57 Page i DSI PHASE II (900 MHz ISSUES) ANALOGUE PUBLIC MOBILE NETWORKS 1 SUMMARY The DSI Phase II study, conclusion (Rec 2
4、2) that analogue public mobile networks should be closed not later than 2008 (section 11.3), seems quite arbitrary. But when consideration is given to the facilities offered by present day terminals as compared to terminals available in the year 2008, it is quite likely that present day analogue ter
5、minais operating at 900 MHz will (by 2008) have fallen into decline and possibly even disuse. This topic is the subject of ongoing discussion within WG-FM. The ERC response to the DSI Phase II report recommendations 21 and 22 are shown below: 21. An in depth study should be conducted as soon as poss
6、ible concerning the possibilities likely to occur for PMR and other non public mobile applications through the decreasing use of the 450 MHz range for public mobile networks. (Section 8.3) R. The ERC accepts this recommendation. The ER0 has already commenced a study on the evolution of PMR services.
7、 The study will develop scenarios for an estimate of spectrum needs applicable to the majority of CEPT countries. One task is to analyse tite short and long term possibilities of transferring the current applications other than PMR from the band 450 - 470 MHz to alternative frequency bands or whethe
8、r it will be possible to cease the operation of these applications. Currently the ERC is of the opinion that spectrum from the analogue mobile neworks could be released on a gradual basis in a phased manner as use declines, rather than releasing all of tlie spectrum at the end of a predefined period
9、. Allpossible avenues for identification of spectrum for PMR should be explored, not solely the release of spectrum from analogue public mobile telephone systems in the UHF spectrum. 122. Analogue public mobile networks should be closed not later than 2008. (Section 11.3) R. From the current perspec
10、tive the ERC does not unanimously support the recommended closure date. However, the ERC does agree that: a) no new analogue public mobile radio networks should be introduced: b) administrations should be encouraged to close down analogue public mobile network by the year 2008, taking into account t
11、lie results of the studies mentioned in recommendation 21; c) analogue cellular public mobile radio networks are likely to be in use in some countries into the next century. In addition the DSI Phase II study, conclusion (Rec 23) that CEPT ERC Recommendation T/R 75-02 should be revised and a new CEP
12、T ERC Decision be prepared which designates the frequency bands 880-890 MHz paired with 925-935 MHz on a European basis, as extension bands for the GSM digital pan-European communication system. (Section 1 1.16), is already in hand within PT-FM25, but suspended until the DSI Phase II work is complet
13、e. The ERC response to the DSI Phase II report recommendation 23 has been included below: 23. CEPT ERC Recommendation TR 75-02 should be revised and a new CEPT ERC Decision be prepared which designates the frequency bands 880-890 MHz paired with 925-935 MHz on a European basis, as extension bands fo
14、r the GSM digital pan-European communication system. (Section 11.16) R The content of Recommendation T/R 75-02 is now reflected in the European Table of Frequency Allocations and Utilisation s. See ERC Report 25. An ERC Decision on EGSM, (ERC/DECY(97)02), has been adopted. STD-CEPT ERC REPORT 57-ENG
15、L 3999 = 23Zb414 0033457 248 ERC REPORT 57 Page 2 The following WG-SE conclusions are to be noted; Administrations should endeavour to close their present 900 MHz analogue networks by the year 2008 and that the expansion of digital networks should not be hindered by these existing analogue services.
16、 No new analogue public mobile radio networks should be introduced. The principle of harmonised spectrum in the specified bands for GSM allocations are recognised, however, some countries with alternative public radiophone bands, would not necessarily need the full tranche of harmonised GSM spectrum
17、. Therefore these allocations should not be made exclusive and should only be made where a need exists. Transition arrangements must be made for existing services, so that existing operational systems can fulfill their design life, with an agreed specified cut-off date and a scaling down of protecti
18、on in the intervening years. In some countries, where the bands proposed for EGSM and UIC are currently used for analogue cellular services, account must be taken of the need to protect existing services from adjacent band compatibility problems that may arise. Note; that Rec 21 referred only to the
19、 450 MHz band, but this ERC responce does reflect the general thrust applicable also for the 900 MHz issues addressed in this study. STD.CEPT ERC REPORT 57-ENGL 1999 = 2326414 0013458 184 ERC REPORT 57 Page 3 2 INTRODUCTION The second phase of the Detailed Spectrum Investigation (DSI-II) was launche
20、d by the European Radiocommunications Committee (ERC) of the Conference of European Postal Telecommunications Administrations (CEPT) in March 1993 with terms of reference as follows: to investigate the current and foreseen use of the radio spectrum in CEPT countries in the frequency range 29.7 MHz t
21、o 960 MHz, to investigate the way this spectrum is currently managed and administered, to produce a detailed document addressing the issues which shall include, as appropriate, recommendations to the ERC of the CEPT. A principle objective of the DSI process is to establish a European Table of Freque
22、ncy Allocations and Utilisations, effectively a harmonised band plan for Europe. A proposed table covering this phase of the DSI is to be found at Annex 1 to the Results Document of the Detailed Spectrum Investigation report, pages 163 - 179 inclusive. The DSI Phase II report concludes that analogue
23、 public mobile networks should be closed not later than 2008 and that Recommendation T/R 75-02 should be revised - designating the frequency bands 880-890 MHz paired with 925-935 MHz on a European basis, as extension bands for the GSM, see below; Rec 22. Analogue public mobile networks should be clo
24、sed not later than 2008. (Section 1 1.3) Rec 23. CEPT ERC Recommendation T/R 75-02 should be revised and a new CEPT ERC Decision be prepared which designates the frequency bands 880-890 MHz paired with 925-935 MHz on a European basis, as extension bands for the GSM digital pan-European communication
25、 system. (Section 1 1.16) This ERC report is based upon the earlier study on DSI-II carried out within CEPT WG-SE, entitled DSI Phase II Examination of 900 MHz Issues, see SE(96)21 Annex 8. See ERC response in the Summary on page 1. The report considers the spectrum engineering issues associated wit
26、h the recommendation embodied within the DSI Phase II report and lists recommendations for consideration by frequency managers. Definitions of the following terms used within this report are shown within Annex 1; Minimum Carrier Separation, Minimum Frequency Separation, Co-exist. STD*CEPT ERC REPORT
27、 57-ENGL 1999 232b414 0013459 O10 = ERC REPORT 57 Page 4 3 STUDY A number of analogue radiotelephone systems are operational within Europe, with some still experiencing a degree of expansion. Such systems include; NMT-900 in Finland, Sweden, Norway and Denmark, TACS in the UK, Italy, Ireland, Spain
28、and Austria. Radiocom 2000 in France. These existing systems have differing operational characteristics / frequencies and as a result lend themselves to sharing by different degrees. e.g. theoretical as well as practical studies have indicated that Radiocom 2000 and NMT-900 are similar in terms of t
29、heir adjacent band compatibility performance, and are not given to Co-existing easily with GSM whereas TACS is less problematic. System parameters R2000 Output power (base) 8 dBW Output power (mobile) 8 dBW Sensitivity (base) -1 12 dBm Sensitivity (mobile) -1 12 dBm Protection Ratio 12 dB Bandwidth
30、12.5 kHz NMT 10 dBW 8 dBW -1 15 dBm -1 13 dBm 8 dB 25 kHz TACS 6 dBW 6 dBW (class 2) NMT-900. Typical minimum frequency separation in excess of 1.5 MHz for most scenarios. The summary table below indicates a worst case separation distance of 1.6 MHz for analogue radiotelephone systems in general fro
31、m typical GSM/UIC interferers. TACS. No significant compatibility problems envisaged from the existing use of GSM or CT2 to TACS. Radiocom 2000. Minimum frequency separation between GSM or R2000 and tactical radio relays is expected to be 2 MHz. STDOCEPT ERC REPORT 57-ENGL 1777 E 2326434 00334b0 832
32、 ERC REPORT 57 Page 5 4 MINIMUM FREQUENCY SEPARATIONS - MHz (For Worst Case Base to Mobile, or Mobile to Base, Interference Scenarios) SYSTEM Minimum Separation Spectrum GSMAJIC 1.6 MHz (Radiocomm2000) CT1 ET1 + Note 1. TETRA FRENCH RADIO RELAY 2 MHz 0.6 MHz - Note 2. NOTE 1 Allocated frequencies pr
33、ovide enough separation, NOTE 2 MS to MS and BS to BS interference scenarios would generally require a greater separation. This is a potential problem in the border of uplinks and downlinks, such as in the region of 915 MHz. Detailed GSM/UIC minimum coupling loss interference calculations (section 7
34、.3 and 7.9 within se(95)48) show a need for about 6 MHz separation. The frequency separations shown are based on a Minimum Coupling Loss (MCL) of 80 dB which equates to interference distance of I O0 metres using the HATA propagation model, or i kilometre using free space path loss. 5 CONCLUSIONS The
35、 ERC response to the DSI Phase II report recommendations 21,22 and 23 are shown below: 21. An in depth study should be conducted as soon as possible concerning the possibilities likely to occur for PMR and other non public mobile applications through the decreasing use of the 450 MHz range for publi
36、c mobile networks. (Section 8.3) R. The ERC accepts tlib recommendation. Tlie ER0 lias already commenced a study on tlie evolution of PMR services. The study will develop scenarios for an estimate of spectrum needs applicable to the majority of CEPT countries. One iask b to analyse tlie short and lo
37、ng term possibilities of transferring the current applications other tlian PMR from the band 450 - 470 MHz to alternative frequency bands or wlietlier it will be possible to cease tlie operation of tliese applications. Currently tlie ERC is of the opinion that spectrum from the analogue mobile netwo
38、rks could be released on a gradual basis in a phased manner as use declines, ratlier tlian releasing all of tlie spectrum at tlie end of a predefined period. Allpossible avenues for identification of spectrum for PMR sliould be explored, not solely tlie release of spectrum from analogue public mobil
39、e teleplione systems in tlie UHF spectrum. 122. Analogue public mobile networks should be closed not later than 2008. (Section 11.3) 1 R. From tlie current perspective tlte ERC does not unanimously support tlie recommended closure date. However, the ERC does agree tliaf: a) no new analogue public mo
40、bile radio networks sliould be introduced; b) adminbtrations should be encouraged to close down analogue public mobile network by tlie year 2008, taking into account the results of tlie studies mentioned in recommendation 21; analogue cellular public mobile radio networks are likely to be in use in
41、some countries into tlie next century. 23. CEPT ERC Recommendation T/R 75-02 should be revised and a new CEPT ERC Decision be prepared which designates the frequency bands 880-890 MHz paired with 925-935 MHz on a European basis, as extension bands for the GSM digital pan-European communication syste
42、m. (Section li. 16) STD-CEPT ERC REPORT 57-ENGL 3999 W 2326434 003346L 779 = ERC REPORT 57 Page 6 R. The content of Recommendation T/R 75-02 is now reflected in the European Table of Frequency Allocations and Utilisations. See ERC Report 25. An ERC Decision on EGSM, (ERC/DEC/(97)02), has been adopte
43、d. Analogue cellular radiotelephones are likely to be in use in some member states well into the next century, however it is concluded that administrations should endeavour to close their present 900 MHz analogue networks by the year 2008 and that the expansion of more digital networks should not be
44、 hindered by these existing analogue services. The principle and benefits of harmonised spectrum in the specified bands for GSM allocations are recognised, however these allocations should not be made exclusive and only where a need exists: Some countries with alternative public radiophone bands, wo
45、uld not necessarily need the full tranche of GSM spectrum. The date of 2008 seems quite arbitrary, but when consideration is given to the facilities offered by present day terminals as compared to terminals available in the year 2008, it is quite likely that present day analogue terminals operating
46、at 900 MHz will (by 2008) have fallen into disuse in many member states. This topic is the subject of ongoing discussion within WG-FM. In the interim, transition arrangements must be made for existing services, so that existing operational systems can fulfill their design life, with an agreed specif
47、ied cut-off date and a scaling down of protection in the intervening years. In some countries, where the bands proposed for EGSM and UIC are currently used for analogue cellular services, account must be taken of the need to protect existing services from adjacent band compatibility problems that ma
48、y arise. STD-CEPT ERC REPORT 57-ENGL 1999 232b4L4 00134b2 b05 ERC REPORT 57 Page 7 ANNEX 1 DEFINITIONS OF TERMS USED IN THIS REPORT: MINIMUM CARRIER SEPARATION: - The minimum separation (kHz) required between the nearest carriers of two adjacent band systems for them to co- exist. MINIMUM FREQUENCY
49、SEPARATION: - The minimum separation (kHz) required between the band edges of two adjacent band systems for them to co- exist. Minimum Frequency Separation is less than the Minimum Carrier Separation. The difference is of the order of one half of the sum of the two systems channel spacing. e.g. for GSM and TETRA a minimum frequency separation of x kHz equates to a minimum carrier separation of x + 112.5 kHz. See Figure I below. CO-EXIST: - The systems will operate satisfactorily in adjacent bands. i.e. the magnitude of the interference anticipated is considered acceptable. Figure
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