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À ?        ? ? ?      ?    8?       ? ? ~  ?  ? ?  ? ?  ?    ?  ? ??  ?   ?   ? ??  ?   ?  ? ? ? ? ? ? ? ? ?  ? ?   ?   ?   ?  ?  ? ?? ? ? ??? ~?   ? ? ? ?? ? ??  ? ? ??  ?  ?  ?À? ? ?? ?? ?? ? ? ? ?? ?? ??? ? ?? ?? ? ? ?? ? ?? ??  ??  ???  ?  ?  ? ?? ??  ?  ?  >?  ?  ?? - ?: 9 4ǀ? ?4 4 4? 4 4 4 4 5? 5 4 ?4 ?4 5 5 5 ?1? ?1 ?1 ?1 ?0 1x 1 / /? ?/π / / / .? ??.? ?. <. - - - --,,?,,-?----?+?* ??* ?+,>,,,?,?,?,--.?.?.?.%?À%%%%%%?%%?%?%?%&&'''?'?'?''?'())))x)?)?)?))*+++ǀX? π? ? ??? ##?&#&#? %#0%#x?%#?x%#?|%#?%#?%#?%#?%#%#%#%# ?%# $# ?$#?$# $# ?$# $#$#$#$#$#$#$#$###??####?##?##?#$ ?#$'$?'$'*'*'+'++XC v*   Y- U 1 1T!2|dd}  Y-footerX` hp x (#%'0*,.8135@8:to implement IMT2000 (RR S5.388 and RES 212 (Rev. WRC97), around the year 2000. The   [portions 19802010/21702200 MHz are allocated to MSS worldwide, potentially for the satellite   =component of IMT2000 (RR S5.389A). Internationally, nonIMT2000 MSS systems are likely   to use these MSS allocations thereby reducing the amount of spectrum available on a worldwide   basis for the satellite component.   Contributions to the March 1998 TG8/1 meeting indicate some interest in the following bands   as extension bands for the satellite component: 15251559/1626.51660.5 MHz, 1610  ]1626.5/2483.52500 MHz, 15591567/part of 16751690 MHz, 1660.51668.4 MHz and 2500  2535/26552690 MHz. Some of these bands are already allocated to MSS.   X9!-  >PRELIMINARY VIEW: Additional spectrum requirements (if demonstrated) for the satellite   component of IMT2000 may be fulfilled in the existing MSS allocations around 13 GHz, taking   /into account the spectrum requirement for other types of MSS services. The U.S. opposes   }allocations for bands where radiolocation, radionavigation (including aeronautical   radionavigation), radionavigationsatellite, space services and passive services are primary or   =secondary, given that there exists a general consensus that IMT2000 will not be able to share"{% C*&&p&"   Lwith these services and TG8/1 has no plans for performing sharing studies. However, the U.S.   view regarding the 15591567 MHz band is stated in the preliminary view for Agenda Item 1.9.   Furthermore, the U.S. opposes band segmentation and refarming of bands where there are existing   services.     X-   WRC2000 Agenda Item 1.6.1 : review of spectrum and regulatory issues for advanced mobile   Lapplications in the context of IMT2000, noting that there is an urgent need to provide more   Zspectrum for the terrestrial component of such applications and that priority should be given to   .terrestrial mobile spectrum needs, and adjustments to the Table of Frequency Allocations as  V" -necessary;  X -  ISSUE: Additional spectrum requirements for the terrestrial and satellite components of IMT  2000.  X& -  BACKGROUND: IMT2000 defines 3rd generation wireless systems providing worldwide   telecommunications services regardless of location, network, or terminal used. Integrated   jterrestrial mobile and mobile satellite systems will provide different types of wireless access on   a global basis. Key features are high degree of commonality of design, compatibility of services,   .high quality, small pocket terminal with worldwide roaming capability, and capability for multi  media applications.   WARC92 identified 240 MHz for worldwide use by Administrations wishing to implement IMT  2000 (RR S5.388 and RES 212 (Rev. WRC97), around the year 2000. 2x30 MHz of that was   yallocated to MSS worldwide, potentially for the satellite component of IMT2000 (RR S5.389A).   Existing fixed, mobile and mobile satellite services use portions of the bands identified for IMT  2000 implementation, thus impacting the common spectrum available worldwide for IMT2000.   Contributions to the TG8/1 April meeting indicate a requirement for additional worldwide and   yregional spectrum (EuropeTerrestrial 120 MHz). In the U.S., a 1994 PCIA survey estimated 235   MHz of additional spectrum. The U.S. contribution, a 1998 PCIA survey, was used by TG8/1   to develop an example calculation of additional spectrum required for an ITUR Draft New   lRecommendation. The U.S. estimates for the year 2010 could reach 250 MHz, for total of   around 500 MHz required for IMT2000. In a similar draft new recommendation on satellite   spectrum requirements, an example based on U.S. traffic data in year 2010 estimates 2x33 MHz   of additional spectrum.  X-  PRELIMINARY VIEW: If the need for additional spectrum for IMT2000 is demonstrated, the   U.S. may support some additional spectrum for the 20052010 timeframe, amount to be  X9!-determined and subject to appropriate sharing studies.    "" C*&&#"Ԍ X-    WRC2000 Agenda Item 1.13: on the basis of results of the studies in accordance with  V-Resolutions 130(WRC97), 131(WRC97), and 538(WRC97):   Xq<   1.13.1: to review and, if appropriate, revise the power limits appearing in Articles S21 and S22   in relation to the sharing conditions among nonGSO FSS, GSO FSS, GSO broadcastingsatellite   service(BSS), space sciences and terrestrial services, to ensure the feasibility of these power limits   and that these limits do not impose undue constraints on the development of these systems and  V-services;  Xp<  Z 1.13.2: to consider the inclusion in other frequency bands of similar limits in Articles S21 and  WL< S22 , or other regulatory approaches to be applied in relation to sharing situations;  X -  LISSUE: Regulatory and technical provisions to enable sharing among nonGSO FSS, GSO FSS,  X -GSO BSS, space sciences and terrestrial services.  XQ -  BACKGROUND: WRC97 adopted provisional power flux density limits in certain frequency   bands which would apply to nonGSO FSS systems to protect GSO FSS networks, terrestrial  X-  services, and GSO BSS networks. Resolution 130 (WRC97), Use of NonGeostationary Systems  X-  in the FixedSatellite Service in Certain Frequency Bands and Article S22.2 of the Radio   [Regulations contain limits corresponding to an interference level caused by one NGSO system   lin the frequency bands 10.712.75 GHz, 17.818.6 GHz, and 19.720.2 GHz. Resolution 131  Xq-  (WRC97), Power FluxDensity Limits Applicable to NonGSO FSS Systems for Protection of  XM-  LTerrestrial Services in the Bands 10.712.75 GHz and 17.719.3 GHz, and Article S21 contain  X)-  limits to protect terrestrial service. Resolution 538, Use of the Frequency Bands Covered by  X-  Appendices 30 and 30A by NonGSO Systems in the FixedSatellite Service, and Article S22   Lcontain limits corresponding to an permissible levels of interference level from a NGSO system   into a GSO BSS network. These limits are provisional, subject to review by ITUR and   confirmation by WRC2000.  X*-PRELIMINARY VIEW:  X- EY4 <DL!p x(08"1.,kThe U.S. continues to review the provisional power limits with the intent of protecting the  EYMGSO FSS, GSO BSS, space sciences, and terrestrial services while allowing the introduction   of NGSO FSS systems.(#  X- EY2.,kThere will be a need for an alternative approach to facilitate sharing in some specific  EYsituations. The provisional epfd limits and associated time allowances do not adequately  EY?protect existing GSO FSS networks with large earth station antennas (large earth station  EYlantennas will be defined as a result of technical work within the ITUR). The U.S. favors   coordination between NGSO FSS networks and these GSO FSS networks. (#  X"- EY3.,kEarth stations operating in the 13.7514.0 GHz band are technically constrained by S5.502  EY(minimum size of 4.5 meters; e.i.r.p. between 68 and 85 dBW), S5.503 (e.i.r.p. density in the  EYband 13.77213.778 MHz), and S5.503A (FSS shall not cause harmful interference to NGSO  EY\space stations in the space research and Earth explorationsatellite services until January 1,  EYN2000). In addition, there are ITUR Recommendations (e.g., ITUR S.1068 (Fixedsatellite"m% C*&&C&"  EY>service and radiolocation/radionavigation services sharing in the band 13.7514.0 GHz) and  EY{ITUR SA.1071 (Use of the 13.75 to 14.0 GHz band by the space science services and the  EYfixedsatellite service)) that describe sharing situations with the fixedsatellite service,  EY\including recommended limitations on the FSS. These footnotes and recommendations will   have to continue to be applied to both GSO and NGSO systems operating in the band. (#  X- EYe4.,kCharacteristics of radars currently operating in the bands 13.7514.0 GHz have been  EY]examined. Radars operating in the 13.7514.0 GHz band employ e.i.r.p. values of up to 79  EY dBW. Interference from these radiolocation stations to NGSO FSS networks would appear   to be probable and sharing may not be feasible.(#  X - EY\5.,kCharacteristics of radars currently operating in the band 17.317.7 GHz have been examined.  EYRadars operating in the band 17.317.7 GHz employ e.i.r.p. values up to 115 dBW. Sharing  EYwas found to be feasible with GSO FSS systems (Earthtospace) if the radiolocation stations  EYlimit their emissions toward the geostationary orbit. Sharing would not appear to be feasible   between radiolocation stations and NGSO FSS networks.e(#  X- EY 6.,kSharing with satellite systems in quasigeostationary satellite orbit needs to be considered   within this agenda item.(#        yO-#C\  P6QsP#For additional information, please contact Damon C. Ladson or Maureen C. McLaughlin at 4182150.     yhTdddh y