一种网络化卫星测控系统多址接入算法研究

Research on multiple access algorithm of network satellite TT&C system

摘要:

大规模低轨卫星星座的出现，对地面测控系统提出了更高的要求，这使得网络化测控技术成为了各国研究的重点技术。本文针对低轨卫星网络化测控系统的接入问题进行了研究。首先，概述了传统低轨卫星星座发展历程及多址接入技术需求背景；然后，在分析传统CSMA（Carrier Sense Multiple Access，载波侦听多路访问）与TDMA（Time Division Multiple Access，时分多址）接入技术性能的基础上，提出了一种自适应接入方案，使得网络化测控系统在负载量较高或较低时都具有良好的网络性能。本文通过仿真验证了自适应接入技术在系统时延、吞吐量以及信道利用率上的优越性。

Abstract:

The appearance of large-scale low earth orbit satellite constellation puts forward better requirements for the ground TT&C system. So many contries focus on measurement and network system. In this paper, the access problem of satellite TT&C network system is studied. Firstly, the development history of traditional low orbit satellite constellation and the demand background of multiple access technology are summarized. Then, based on the analysis of traditional access such as CSMA and TDMA, an adaptive access scheme is proposed, which makes the measurement and control system have nice performance when the load is high or low. In this paper, the advantages of the adaptive access scheme in system delay, throughput and channel utilization are verified by simulation.