移动卫星系统的间隙填充技术

J. Ryu, M. Shin, S. Han, D. Jang, Hojin Lee
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引用次数: 7

摘要

卫星移动通信系统迅速得到广泛应用,用户开始要求在任何地方的移动环境下提供高速多媒体服务;即使是高铁。针对这些需求,移动卫星通信系统是在高速列车上提供高速多媒体服务的关键解决方案。目前已经发展了高速便携式系统,如WiMAX、Wibro等。但由于列车速度的限制,这些系统无法提供高速互联网服务。为了解决这个问题,移动卫星通信适合这种环境。移动卫星通信系统可以为WiMAX或Wibro系统起到回程的作用。但移动卫星通信系统存在信号遮挡、电源拱、树木和隧道等缺点。阴影、功率弓和树会降低网络性能,可以通过使用分组FEC来克服。但是在隧道中提供网络服务是很困难的。为了解决这一问题,我们采用了在隧道终端与卫星之间进行中继的补隙系统。本文介绍并比较了各种类型的间隙填充剂,透明型和不透明型,最后介绍了我们的间隙填充剂系统是如何配置的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The gap filler technology for mobile satellite system
Satellite mobile communication systems have rapidly come into widespread use and user have begun to require high speed multimedia services in mobile environments in any place; even if high speed train. In response to these demands, mobile satellite communication system is the key solution to provide high speed multimedia services in high speed train. Nowadays the high speed portable system has been developed for example WiMAX, Wibro and so on. But these system can't provide high speed internet services because of the train speed. To figure out this problem, mobile satellite communication fits this environment. And mobile satellite communication system can play in a role of backhaul for WiMAX or Wibro system. But there is disadvantage in mobile satellite communication system, signal may suffer shadowing, power arche, trees and tunnels. Shadowing, power arches and trees degrades the network performance, it can be overcomed by use of packet FEC. But it is difficult to provide internet service in tunnel. To figure out this problem, we adopt the gap filler system which relay from/to satellite to/from terminal in tunnel. In this paper we introduce and compare the various types of gap filler, transparent and non-transparent types and finally how our gap filler system is configured.
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