【摘要】 个人手持电话系统(PHS)是固定电话的补充和延伸,对于网络运营商来说,建网速度快、投资小,对于用户来说,经济方便、花20%的钱享受80%的移动服务,因而在我国得到迅速发展。PHS属于微蜂窝数字无线接入系统,PHS技术主要体现在空中接口的设计上,空中接口包括物理层、数据链路层、网络层。文中主要介绍PHS空中接口的帧结构、逻辑信道、协议结构和呼叫流程,对其中的重点和难点进行简要分析和总结。更多还原

【Abstract】 For operators of telecommunication network, the use of PHS systems expedites network construction and its investment is small. For users, PHS is economical and convenient; people can enjoy eighty percent of mobile services with twenty percent of their cost. PHS is the supplement and extension of fixed line telephone, and it is developing rapidly in our country. PHS belongs to digital wireless access system with micro-cells, its’ key technology mainly is embodied in the design of air interface, which includes physical layer, data link layer and network layer. This paper mainly discusses the PHS air interface including its frame architecture, logic channel, protocol architecture and call procedures. The key points and difficulties of the air interface are analyzed and summarized.更多还原