基于互联网的导航定位增强信息大规模实时播发研究

在卫星导航系统中，可通过注入增强信息的方法提高导航定位精度、可靠性和完好性。导航定位增强信息一般由卫星播发，通过互联网播发导航定位增强信息是近期一个新的研究热点。本文综述了互联网播发技术的研究现状，提出了一个基于互联网的导航定位增强信息大规模实时播发系统模型，采用基于对等网络技术、具有自组织特性的分层混合结构覆盖网络，有效降低了系统构建和管理的复杂性。论文还分析了导航定位增强信息播发的实时性和安全性需求，并提出了解决思路。

Large-scale and Real-time Broadcasting for the Augmentation Message of GNSS Through Internet

Augmentation message is useful to improve accuracy, reliability and integrity of GNSS. Generally it could be broadcasted by GEO satellites. And currently that augmentation message are broadcasted through Internet becomes important hot spot of research. In this paper, we firstly survey recent international research in related area. Primarily the paper draws attention to advance a system model for large-scale and real-time broadcasting augmentation message of GNSS through Internet. The Peer-toPeer overly network with layered architecture and automatic restructuring of topology is adopted. It is efficient to decrease the complexity of construction, maintenance and management of system. And after the requirements of real-time broadcasting and reliability are analyzed, the methodologies are dissertated in the paper to improve the relevant performance.