VoIP技术在海上通信中的应用与研究-毕业论文网 关键词：海上通信；VoIP；低价话费；优越性 [gap=1158]KEYWORDS: Maritime Communications；VoIP；Low-cost of Communication；Advantage
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The emergence of low-cost and highly accessible communication tools, however, has changed all of this.
然而，对低成本易获取的交流工具的迫切需要改变了这一切。
ECC (Elliptical Curve Crypto system) is suit for the mobile communication equipment for its advantage of short key and low cost.
椭圆曲线密码体制因其具有密钥短、开销小的优点，非常适合应用于移动通信设备。
Presently, Mobile Communication Company's GPRS network that based on the 2.5 G can supply packet radio service and low cost service of wireless transmission.
目前，移动公司建成的基于2.5代移动通信gprs网络能够提供端到端的无线分组交换数据业务，提供低成本的数据无线传输业务。
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