1、QUESTION ITU-R 118-4/5*,*Sharing criteria between the mobile-satellite serviceand the fixed service(1990-1995-1999-2001-2002)The ITU Radiocommunication Assembly,consideringa) that systems in the fixed service (FS) are widely employed throughout the world and makeextensive use of much of the radio-fr
2、equency spectrum;b) that the mobile-satellite service (MSS) is allocated in a number of bands in the ITU RadioRegulations on a primary basis co-equally shared with the FS;c) that there is potential for interference to systems in the FS from MSS systems using bothgeostationary and non-geostationary o
3、rbits;d) that several World Radiocommunication Conferences addressed a number of allocationissues that affected sharing between the FS and MSS,decides that the following Questions should be studied1 What levels of interference from the MSS are acceptable to systems in the FS, includingpercentage of
4、time considerations?2 What are the necessary and acceptable constraints on the services to facilitate sharing?further decides1 that the initial studies on the Question should be completed by 2006.NOTE 1 “Systems in the fixed service“ in this Question include fixed wireless access systems(both fixed-based technology and mobile-derived technology).NOTE 2 See Recommendations ITU-R F.758, ITU-R F.1107, ITU-R F.1108, ITU-R F.1246,ITU-R F.1335 and ITU-R F.1405._* This Question should be brought to the attention of Radiocommunication Study Group 8 (WP 8D).* Former Question ITU-R 118-4/9.
