应用文章
Introduction
As the wireless industry moves into its third generation of services, data services are becoming a larger portion of the revenue stream for the industry. Data can be routed through both circuit switched networks and packet switched networks. The most popular data application at time of publication is the short message system (SMS). It is widely expected that with time, most wireless networks will migrate toward an exclusively packet switched network, probably using Internet protocol (IP). The SMS systems operate on the current circuit switched networks with great efficiency. Since the message length is limited, the data can be sent to a phone in a single message on the control channel or as a message sent concurrently with a voice connection on the traffic channel. However, for applications that require large data packets, such as internet browsing or streaming video, the SMS system can’t handle the throughput requirements. The packet data system is an area of major development and is seen as the area with the highest potential for growth.
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