STUDIES OF EMERGENCY COMMUNICATION APPLICATION OF INTEGRATED COMMUNICATION NETWORK AND COMPARISON OF AVAILABILITY IMPROVEMENT METHODS

综合通信网应急通信应用研究及可用性改进方法比较

• 批准号: 09650420
• 负责人: HATSUDA Takeshi
• 金额: $ 2.18万
• 依托单位: HOKKAIDO INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650420/
• 关键词: Satellite communication; Propagation characteristics; Sat.D characteristics; Geostationary satellite; Urban propagation characteristics; GPS signals; Propagation characteristics measurements; パケット通信; サイトダイバーシティ方式; サテライトダイバーシティ方式; 災害対策通信; 衛生通信 /

For the aspects of a new minimum cost, high reliability system strategy for the Hokkaido Integrated Telecommunication (HIT) network, system designs and propagation experiments for site diversity and satellite diversity characteristics were examined.[1] HIT Network system design for emergency use.Three aspects of a new system strategy for the Hokkaido Integrated Telecommunication (HIT) network are examined, i.e., (1) network construction by using MS Windows 2000 Server, (2) A packet communication ultra small aperture terminal (PC-USAT) system, which contains a method for overcoming the satellite links rain attenuation discontinuities, (3) An optimum rain margin technique and the 14/12 GHz band rain, snow attenuation and satellite diversity (Sat.D) experiments.[2] Sat.D experiments using plural satellitesThe possibilities of the satellite diversity (Sat.D) system for VSAT earth station in snowing climates are examined by using plural satellites. Six satellite down-link signals are measur … More ed in experiments, i.e., JCSAT-1, JCSAT-3 and Broadcasting Satellite (BS) etc. and diversity gains are obtained by the Sat.D simulation program. From the obtained Sat.D results for snowing attenuation in snowing climates, it becomes clear that the Sat.D would be utilized effectively for the VSAT system, rather than conventional site diversity (SD) system.[3] Site diversity experiments using JCSAT transponderAs for the system design of the HIT network, it must first overcome rain attenuation discontinuity of satellite links. To resolve some of these problems, site diversity (SD) is another candidate. To clarify the SD characteristics for introduction possibility, SD experiments were continued for medium distance earth stations[4] Propagation characteristics and satellite-diversity (Sat.D) characteristics of mobile broadcast geostationary satellite systemThis study deals with the urban propagation characteristics and satellite-diversity (Sat.D) characteristics of mobile broadcast geostationary satellite system by using the GPS (Global Positioning System) signals. For designing digital broadcast from geostationary satellite, it must be clarified the shadowing characteristics by urban building, electrical light poles and trees etc. Southern orbital arc GPS satellite signals with elevation angle between 40〜50 degrees data are used for propagation characteristics, rather than actual geostationary satellite, e.g., the N-STAR.This new measuring method has several merits, i.e., low measuring equipment cost, easy data accumulation (i.e., satellite position, receiver position ard height, received signal levels etc.). A receiving system on a vehicle measured signals fades caused by shadowing building etc. As a result, west to east urban roads are heavily attenuated.Furthermore, to overcome this attenuation, the Sat.D characteristics are processed from measured data. From processing results, more than 90 % satellite visibility percentage can be achieved in urban city by selecting two diversity satellites with separation angles more than about 45 degrees. Less

针对北海道综合电信（HIT）网络的新的最低成本、高可靠性系统策略方面，研究了站点分集和卫星分集特性的系统设计和传播实验。[1]紧急情况下的HIT网络系统设计。对北海道综合电信（HIT）网络的新系统策略的三个方面进行了研究，即，(1)（2）分组通信超小孔径终端（PC-USAT）系统，其中包括克服卫星链路雨衰不连续性的方法;（3）最佳雨容技术和14/12 GHz波段雨、雪衰减和卫星分集（Sat.D）试验。[2]利用多颗卫星进行卫星分集（Sat. D）试验研究了VSAT地球站在下雪气候下利用多颗卫星进行卫星分集（Sat.D）系统的可能性。测量了六个卫星下行链路信号 ...更多信息 艾德在实验中，即，利用Sat.D仿真程序，对JCSAT-1、JCSAT-3、广播卫星（BS）等进行了仿真，得到了分集增益。从所获得的Sat.D的结果，在下雪的气候下，降雪衰减，它变得很清楚，Sat.D将有效地用于VSAT系统，而不是传统的站点分集（SD）系统。[3]利用JCSAT转发器进行站点分集试验HIT网络的系统设计首先要克服卫星链路的雨衰不连续性。为了解决这些问题，站点多样性（SD）是另一个候选者。为了阐明引入可能性的SD特性，继续进行了中等距离地球站的SD实验[4]移动的广播地球同步卫星系统的传播特性和卫星分集（Sat.D）特性本研究利用GPS（全球定位系统）信号研究了移动的广播地球同步卫星系统的城市传播特性和卫星分集（Sat.D）特性。为了设计来自地球同步卫星的数字广播，必须明确城市建筑物、电灯杆和树木等的遮蔽特性。具有40 - 50度数据之间的仰角的南方轨道弧GPS卫星信号用于传播特性，而不是实际的地球同步卫星，例如，这种新的测量方法有几个优点，即，测量设备成本低，易于数据积累（即，卫星位置、接收机位置和高度、接收信号电平等）。车辆上的接收系统测量的信号由于建筑物阴影等原因而衰减，结果，从西到东的城市道路严重衰减。此外，为了克服这种衰减，从测量数据中处理Sat.D特性。从处理结果来看，选择两颗分离角大于45 °的分集卫星，在城市中可以获得90%以上的卫星可见率。少

项目成果

初田健、村上幹幸、山田芳伸、加藤忠義: "F-GTSハイブリッド方式におけるサテライト・ダイバーシチ(Sat.D)方式とサイト・ダイバーシチ(SD)方式組合せによる回線信頼度改善効果の検討"北海道工業大学研究紀要. 28号. (2000)

Ken Hatsuda、Mikiyuki Murakami、Yoshinobu Yamada、Tadayoshi Kato：“在 F-GTS 混合系统中结合卫星分集 (Sat.D) 方法和站点分集 (SD) 方法提高线路可靠性效果的研究” 北海道研究所技术研究公报第 28 号。（2000 年）

吉田、初田他、: "北海道統合通信網におけるPC-USAT方式の衛星回線有効利用率の向上と稼働率改善のための検討"電子情報通信学会技術報告、衛星通信研究会. SAT99-87. 89-94 (1999)

Yoshida，Hatsuda，等：“提高北海道综合通信网络中PC-USAT卫星线路的有效利用率和可用性的研究”，IEICE技术报告，卫星通信研究组（1999）。

T.Hatsuda and Y.Motozumi,: "″Interference Experiments Between Fixed-Satellite and Terrestrial Radio-Relay Services″," IEEE Trans. on Aerospace and Ekectronics Systems (AES). Vol.34,No.1. pp.23-32 (1998)

T.Hatsuda 和 Y.Motozumi，“固定卫星和地面无线电中继服务之间的干扰实验”，IEEE Trans，航空航天和电子系统 (AES) 第 34 卷，第 1 期。 32 (1998)

初田健,西浦秀一,長谷川昌孝: "「改良型PC-USAT方式と簡易型地上網接続方式」" 信学論. B-II,(論文)(採録決定).

Ken Hatsuda、Shuichi Nishiura、Masataka Hasekawa：“‘改进的 PC-USAT 系统和简化的地面网络连接系统’”IEICE 理论，（论文）（已接受）。

三橋龍一,川村浩,青木由直,初田健: "「北海道統合通信網におけるディジタル衛星通信用画像伝送方式」" 信学論. B-II,(論文)(採録決定).

Ryuichi Mitsuhashi、Hiroshi Kawamura、Yunao Aoki、Ken Hatsuda：“‘北海道综合通信网络中数字卫星通信的图像传输方法’”IEICE B-II，（论文）（已接受）。