In digital trunked system, the delay performance of packet data service is greatly affected by the design of system's parameters and the network load.

数字集群系统的参数设计和网络负荷对分组数据业务的延迟具有很大的影响。

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And it features what is called mobile Internet protocol (IP), a packet data service that requires users to pay only for the amount of data they send and receive rather than for the amount of time spent on line.

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On the horizon, new data services such as GPRS (General Packet Radio Service) may make it cheaper for users to stay logged on to AIM all day.

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The smart phone market will only take off when technologies such as GPRS (General Packet Radio Service) are implemented in mobile networks, enabling faster transfer rates of data via mobile phone, she said.

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