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来自世界各地的无线通信先导者的代表们于２０００年３月２９日会集美国芝加哥召开会议 ,开始探讨国际漫游伞形机构的工作。论坛的第一步是促成ＧＳＭ标准间的无缝漫游 ,其它数字技术标准的运营商和提供商包括美国移动电话系统（ＡＭＰＳ）、时分多址（ＴＤＭＡ）、码分多址（?
On March 29, 2000, representatives from leaders in wireless communications from all over the world gathered in Chicago to start a discussion on the work of the International Roaming Umbrella. The first step in the forum is to enable seamless roaming among GSM standards. Other digital technology standard operators and providers include AMPS, TDMA, CDMA (Code Division Multiple Access)