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Documents E-200卫星应急通信系统的设计和应用
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  • Author Author: sophie0love
  • Date Created: 28 Nov 2010 3:20 AM Date Created
  • Last Updated Last Updated: 9 Nov 2021 4:53 PM
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E-200卫星应急通信系统的设计和应用

随着光传输技术的迅猛发展,利用通信卫星提供2M中继传输手段越来越退居次要地位。就目前中国而言,近年来,为了节约运营成本,包括福州、厦门等在内的大多数的省际卫星通信地面站纷纷关闭,仅留下广东、上海、北京、新疆等国际性卫星通信地面站继续扮演着国际传输路由的备份角色。2M卫星通信市场的萎缩,对于中国这样一个幅员辽阔、自然灾害频发的国家而言,并不是一个好现象,因为在灾难发生而导致通信全阻时,方便快捷的卫星通信手段将起着生死攸关的决定性作用。
   福建省地处东南沿海,是一个洪水、台风等自然灾害频发的省份。近年来,闽西北地区由于汛情引发的洪灾曾多次冲断光缆,导致部分县、镇出现通信孤岛的现象时有发生。因此,为了提高这些地区的应急通信保障能力,中国电信福建分公司决定在全省灾情较为严峻的九个县级分公司部署E-200卫星通信系统,实现E1级别的卫星中继传输能力。笔者作为该工程的项目负责人,全程牵头组织了工程调研、设备采购、系统安装和调测等工作。
   E-200卫星通信系统是一个以地球同步卫星为中继的一点对多点2M数字信号传输系统,它以福州无线分公司大楼为中心点,向全省多点进行辐射。该系统依托无线分公司现有的两部车载Ku频段卫星通信地面站(即E-200中心站),灾时能够同时将4个通信孤岛通过E-200系统提供的2M卫星中继接入到福州TSL3长途程控机房。
   利用低成本卫星通信系统提供2M卫星中继,目前在中国电信范围内尚属领先。这对于探讨多灾和偏远地区的对外应急中继传输问题,具有积极的示范和借鉴作用。福建电信的工程技术人员凭着多年从事卫星通信技术的通信理论知识和实践经验,综合考虑福建地区的气候条件、项目成本和传输质量要求等因素,经过多次反复的卫星通信链路预算,设计出具备E1信号传输能力的E-200卫星通信系统。该系统的出台,将在一定程度上将提升该地区通信网络的安全性,确保通信全阻时党政军等重要部门抢险救灾工作的临时通信需求。

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