VSAT 2.2 UAT Uplink Access Test UAT VSAT JUM UAT VSAT UAT VSAT 23 ICT JSAT VSAT [2] ( 1 ) 2 3 UAT ( 2 ) 3 ( 3

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1 Design of Car-mounted Satellite Internet Communication System for Emergency Situations and its implementation Takahiro Tsujii 1 Atsuo Inomata 1 Masatoshi Kakiuchi 1 Akira Yutani 1 Kazutoshi Fujikawa 1 Abstract: We have developed our ideal computing system (MANDARA) which is the integrated information processing environment since an establishment of NAIST. One of feature concepts is for all membership to realize the high mobility for the infrastructure to share informations. On 11 March 2011, the Great East Japan Earthquake has struck the north-east coast. We are forced that we need to take the institute continuity into consideration for the institute continuity from such the severe situation and think that it is important to keep the means of communication for outside over Internet. In this paper, we introduce our designed system to provide the effective and robust communication for a condition without Internet service spot and describe experimentation results at marginal settlements areas for Nara prefecture OIST OIST 1 Nara Institute of Science and Technology, Information Initiative Center 6 [1] c 2015 Information Processing Society of Japan 1

2 VSAT 2.2 UAT Uplink Access Test UAT VSAT JUM UAT VSAT UAT VSAT 23 ICT JSAT VSAT [2] ( 1 ) 2 3 UAT ( 2 ) 3 ( 3 ) 4 ( 4 ) UAT VSAT AC100V 1500W 2.3 VSAT Very Small Aperture Terminal [3] VSAT Very Small Aperture Terminal VSAT HUB VSAT VSAT UAT VSAT VSAT UAT 3 JSAT VSAT HUB IP 2Mbps IP HUB IP 1 1 JSAT c 2015 Information Processing Society of Japan 2

3 情報処理学会研究報告 図 1 図 3 図 2 アドホック型衛星インターネットシステム 変復調装置 自動衛星捕捉アンテナ装置 図 4 図 6 移動型電源供給システム 信号集約装置 図 5 リモコン装置 する東経 162 度に位置する Superbird-B2[4] であり 周波 数帯は Ku バンドを利用する 利用フロー 図 7 としては 事務職員に事務処理 技 術職員が技術フォローができる体制とした 利用料金はガ ソリン代と通信料金が受益者負担となっている 3. 動作確認と検証 3.1 内容 2 アドホック型衛星インターネットシステムの実運用に むけて 動作確認 検証を奈良県吉野郡十津川村の携帯電 図 7 利用フロー 話による通信が困難とされる限界集落を町役場職員に指定 してもらい実施した ( 1 ) 動作確認 ( 2 ) 検証 ( a ) 日時 2014 年 6 月 21 日 土 9:30 12:00 ( a ) 日時 2014 年 6 月 20 日 金 14:00 17:00 ( b ) 場所 b. 樫原 図 8 ( b ) 場所 a. 山水 旅館 駐車場 図 8 ( c ) 天候 曇り一時雨 ( c ) 天候 晴れ c 2015 Information Processing Society of Japan 検証時に 5 分程度の小雨があったが 影響のない範囲で 3

4 3.2 2 JSAT PC TV VPN IP 9 9 ( 1 ) 1 AirStation WZR-1750DHP2 ( 2 ) 1 Apple ipad Retina Wi-Fi 64GB MD515J/A ( 3 ) PC 2 Apple Mac Book Pro OS CPU 2.4GHz Intel Core i7 8GB 1333MHz DDR3 Lenovo ThinkPad T60 OS Windows7 Enterprise 32bit SP1 ( 4 ) TV 1 Polycom HDX4002 ( 5 ) 1 Aruba RAP2RAP5 ( 6 ) IP 1 NEC NTT N-02C ( 1 ) PC 1 Sun Ultra M2 OS Solaris10 8GB CPU AMD Opteron CPU x 2core 2.8GHz ( 2 ) TV 1 Polycom HDX8000 ( 3 ) 1 Aruba AP135 ( 4 ) 1 Aruba Aruba6000 ( 5 ) IP 1 NEC NTT N-02C ( 1 ) TV JSAT *1 Google- 8 * 1 TV Polycom HDX4002 NAIST TV Polycom HDX8000 NAIST NAIST NAIST NAIST NAT ( 2 ) IP Aruba RAP2 IP N-02C VSAT JSAT EsBird [5] BOD Bandwidth On Demand [6] ipad YouTube NAIST 128kbps 512kbps c 2015 Information Processing Society of Japan 4

5 9 UAT VPN Aruba RAP5-WN ( 1 ) 9 PC 2 PC ftp netserver:version2.4 PC2 JSAT Buffalo AirStation WZR- 1750DHP2 ( a ) ftp ( i ) Mac Book Pro kbps : 10MB 3 ( ii ) Mac Book Pro kbps : 10MB 12 ( iii )ThinkPad T kbps : 1MB 3 ( iv )ThinkPad T kbps : 1MB 3 ( b ) netperf(version2.4) ( i ) Mac Book Pro 50 kbps ( ii ) ThinkPad T kbps ( iii )ThinkPad T kbps ( 2 ) TV 6 20 NAIST 9 NAT 384bps NAIST ( 3 ) IP 384kbps. ( 4 ) GUI 9 PC ipad 32kbps 1536kbps 64kbps 2048kbps ( 1 ) TV JSAT EsBird NAT TV ( 2 ) BOD Bandwidth On Demand c 2015 Information Processing Society of Japan 5

6 TV IP BOD ( 1 ) ( 2 ) ( 3 ) 4.1 TV NAT TV 4.2 OD IP 1 IP TV JSAT BOD 2Mbps 9 IP TV 4.3 VSAT 5. VSAT JSAT [1] documents/bousaijyouhou.pdf [2] VSAT content/ pdf [3] Wikipedia VSAT [4] JSAT Superbird-B2 [5] JSAT EsBird whats.html [6] ekouhou.net /disp-a, html 4.4 c 2015 Information Processing Society of Japan 6

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