The ITU Radiocommunication Assembly considering a) that for certain kinds of mobile service (MS) systems, partial data relating to interference protection ratios and minimum field strengths required, exist in documents of some ITU conferences and some ITU-R Recommendations (Note 1), and certain ITU-R Reports (Note 2), et al.; b) that such documents, however, do not constitute a complete and consistent set of data relating to protection of the desired transmission signal quality from interference of all kinds from services operating in all frequency ranges, particularly with respect to VHF band and UHF band MS systems, nor do they assure proper and consistent use in predicting interference signal levels in MS systems; c) that consistent methods are needed for various types of information transmission to assure consistent use of parameters and their values for determining system interference protection criteria; d) that consistent methods are needed as well for calculating interference due to unwanted emissions to assure protection of the desired signal quality in the necessary bandwidth of a MS system; e) that the Radiocommunication Bureau (BR) has requested guidance from Radiocommunication Study Groups on the methods to be employed for the calculation of the interference from the mobile-satellite service (MSS), to the MS, and on the criteria to be used; f) that consistent methods are needed as well for calculating interference due to spectrum sharing with other services such as MSS or fixed service to assure protection of the desired signal quality in the necessary bandwidth of a MS system; g) that interference prediction parameters and computational methods are also under study in other Radiocommunication Study Groups, in other telecommunications standards organizations, and in frequency coordination organizations.
ITU-R QUESTION 1-4/5-2007 history
2007ITU-R QUESTION 1-4/5-2007 Interference protection ratios and minimum field strengths required in the land mobile services