1、QUESTION ITU-R 241-1/5*Cognitive radio systems in the mobile service1(2007-2007)The ITU Radiocommunication Assembly,consideringa) that the use of mobile radio systems is growing at a rapid rate globally;b) that more efficient use of spectrum is essential to the continued growth of such systems;c) th
2、at cognitive radio systems may facilitate the more efficient use of spectrum in mobileradio systems;d) that cognitive radio systems may offer functional and operational versatility and flexibilityin mobile radio systems;e) that considerable research and development is being carried out on cognitive
3、radio systemsand related radio technologies;f) that the implementation of cognitive radio systems may include technical and regulatoryissues, and it is beneficial to identify the technical and operational characteristics;g) that Reports and/or Recommendations on cognitive radio systems would be comp
4、lementaryto other ITU-R Recommendations on mobile radio systems,notingthat there are network aspects related to the control of cognitive radio systems,decides that the following Questions should be studied1 What is the ITU definition of cognitive radio systems?2 What are the closely related radio te
5、chnologies (e.g. smart radio, reconfigurable radio,policy-defined adaptive radio and their associated control mechanisms) and their functionalities thatmay be a part of cognitive radio systems?3 What key technical characteristics, requirements, performance and benefits are associatedwith the impleme
6、ntation of cognitive radio systems?4 What are the potential applications of cognitive radio systems and their impact on spectrummanagement?5 What are the operational implications (including privacy and authentication) of cognitiveradio systems?6 What are the cognitive capabilities that could facilit
7、ate coexistence with existing systems inthe mobile service and in other radiocommunication services, such as broadcast, mobile satellite orfixed?_* Former Question ITU-R 241-1/8.1 This Question should be brought to the attention of Study Groups 1, 4, 6 and 9.Formatted: English (U.K.), Not Highlight-
8、 2 -7 What spectrum-sharing techniques can be used to implement cognitive radio systems toensure coexistence with other users?8 How can cognitive radio systems promote the efficient use of radio resources?further decides1 that the results of the above studies should be included in one or more Recommendations,Reports or Handbooks;2 that the above studies should be completed by the year 2010.Category: S2
