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手持式无线电话机(俗称“大哥大”)是蜂窝移动通信系统的典型终端设备。在系统结构上,它与基站(BS),移动交换局(MSC)并重,共同完成对一个固定点(PSTN内)或移动点(另一终端)的访问。而作为直接供普通用户使用的消费产品,它在工作的可靠性、稳定性、呼叫速度甚至体积、重量、美观程度等方面有更高的要求。因此,世界各大生产厂家竞相投入很大的力量,致力于于持机的研究,力图以更多的功能、完善的性能、轻巧美观的外形获得消费者的满意。
Handheld radiotelephones (commonly known as “Big Brother”) are typical terminal devices for cellular mobile communication systems. In the system structure, it is equal to the base station (BS) and the mobile switching center (MSC) to complete the access to a fixed point (within the PSTN) or a mobile point (another terminal). As a consumer product that is directly used by ordinary users, it has higher requirements in terms of reliability, stability, speed of call, and even size, weight and beautiful appearance. Therefore, the world’s major manufacturers competing to invest a lot of strength, is committed to the study of the machine, trying to more features, perfect performance, lightweight and beautiful appearance to obtain consumer satisfaction.