随着中国经济建设的高速发展,人们的工作、生活节奏日益加快,对通信服务的需求也不断提高,原有的有线窄带话音业务已远远不能满足人们的通信需求。通信设备的小型化和满足用户在任何活动范围内使用已成为当今通信技术发展的主流。特别是在无线通信领域,5W化(Whoever:任何人;whenever:在任何时间;wherever:在任何地点;whomever:与任何人; With the rapid development of China’s economic construction, people’s work and living conditions are accelerating day by day. The demand for communication services is also constantly increasing. The original wired narrowband voice service is far from satisfying people’s communication needs. The miniaturization of communications equipment and its ability to satisfy users in any area of ​​activity has become the mainstream of today’s communications technology. Especially in the field of wireless communications, 5W (Whoever: whenever; at any time; wherever: at any place; whomever: with anyone;