Regulatory bodies in the world (including the Federal Communications Commission in the United States and Ofcom in the United Kingdom) as well as different independent measurement campaigns found that most radio frequency spectrum was inefficiently utilized.
各国の無線に関する統制機関(米国における連邦通信委員会や、英国におけるOfcomなど)は、周波数のスペクトラムの利用が非効率的であることを見出した 。