百年发展移动通信以其移动性为最主要的特点,其发展从早期的大区制移动通信系统发展到后来的小区制蜂窝移动通信系统,主要是由于大区制下覆盖半径系统容量的局限性所决定;而小区制蜂窝通信具有小覆盖、小发射功率和资源重用等优点,决定了它在现代移动通信中的重要作用。蜂窝系统的概念和理论20世纪60年代就由美国贝尔实验室等单位提了出来,但其复杂的控制系统,尤其是实现移动台的控制,直到70年代随着半导体技术的成熟,大规模集成电路器件和微 Centennial Development Mobile communication is characterized by its mobility as the most important feature. Its development from the early large-area mobile communication system to the subsequent cell-based cellular mobile communication system is mainly due to the limitation of covering the radius system capacity under the large area system The decision of cellular communication has the advantages of small coverage, small transmission power and resource reuse, which determines its important role in modern mobile communications. The concept and theory of cellular systems were brought forward by the United States Bell Labs and other units in the 1960s. However, its complicated control system, especially the mobile station control, was largely integrated into the 70s as the semiconductor technology matured Circuit devices and micro