在对无线移动通讯分析的基础上，本文研究了现在应用广泛的短消息服务。
On the basis of the demand analysis of wireless mobile communication, the dissertation researched the system of short message service-SMS which now has applied widely.
然而，当移动电话产业在发达国家一度接近饱和，而且从每位用户取得的收入开始下跌的时候，无线通讯在这些地区依然飞速发展。
Yet wireless communications in these areas are advancing rapidly at a time when the mobile-phone industry is approaching saturation point in rich countries and the average revenue per user is sagging.
10部WNaN移动手持无线电可在通讯中断时参与多次同时呼叫，提供态势感知数据。
WNaN mobile handheld radios that participated in multiple, simultaneous call groups and delivered situational awareness data despite communications disruptions.
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