大学表紙.PS

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1 Wi-Fi LAN A Campus-wide Wireless LAN System in Kagoshima University Shared with Telecommunication Carriers Masato MASUYA, Koichi SHIMOZONO, Itaru TAKAHASHI, Syunsei AIBA, Tomonori KAWAHARA, Tamotsu FURUYA, Kentaro ODA, Toyohiko SATO, and Kunihiko MORI Computing and Communications Center, Kagoshima University LAN LAN LAN PC LAN LAN Wi-Fi LAN LAN Wi-Fi Wireless networking facilities are essential for current higher education, so that many universities have deployed the campus-wide wireless LAN system. The increase in students who use mobile devices, such as, Wi-Fi enabled mobile PCs, smartphones and tablets, has urged us to improve the wireless LAN system in Kagoshima University. Therefore, in the most recent replacement of campus information network system, we built the novel campus-wide wireless LAN system introducing telecommunication carrier s Wi-Fi services. Keywords : Wireless LAN, carrier Wi-Fi, campus information network system 1. LAN LAN PC LAN , Korimoto, Kagoshima {masatom, simozono, taka, aiba, kawahara, furuya, odaken, sato, mori}@cc.kagoshima-u.ac.jp LAN 2004 Web SSID LAN LAN LAN 100

2 2008 ISP FREESPOT 1) 100 FREESPOT LAN BUFFALO FS-G54 LAN LAN LAN 2005 NTT LAN 2) NTT 2012 au Wi-Fi SPOT 3) au LAN LAN LAN LAN ) LAN LAN FREESPOT LAN LAN LAN LAN LAN 353 LAN Web ISP LAN Wi-Fi LAN LAN Wi-Fi LAN LAN Wi-Fi 6) 7) LAN Wi-Fi Wi-Fi LAN 2. LAN ),5) KNIT4 4) LAN KNIT5 5) LAN LAN LAN

3 2.1 LAN LAN Cisco 5508 Wireless Controller LAN 500 LAN 7000 VLAN 512 1Gbps 8Gbps 2.2 LAN LAN LAN 6 dbi Cisco Aironet 2702e AIR-CAP2702E-Q-K9 353 AIR-PWRINJ4= Cisco Aironet 2702e IEEE802.11g/n 2.4GHz IEEE802.11a/n/ac 5GHz 3 4 MIMO 3 LAN IEEE802.11n 40MHz 450Mbps IEEE802.11ac 80MHz 1.3Gbps 2.4GHz GHz W52(36 48 ) W53(52 64 ) W56( ) 19 LAN 1 16 SSID LAN VLAN DHCP IP DHCP IP SSID IP 2.3 LAN LAN LAN FREESPOT LAN LAN LAN LAN 1 LAN 353 LAN LAN 500 LAN LAN LAN LAN 1 5

4 1 LAN LAN SSID LAN LAN LAN SSID VLAN SSID LAN SSID LAN SSID Cisco Aironet 2702e 16 SSID LAN LAN Wi-Fi LAN SSID LAN SSID 20MHz IEEE802.11n 216.7Mbps IEEE802.11ac 288.9Mbps 5GHz W GHz 5GHz 2.4GHz 5GHz LAN 3.1 LAN Web KNIT5-OPEN KNIT5-STAFF KNIT5-GUEST Wi-Fi SSID eduroam SSID eduroam KNIT5-OPEN Web Web ID ID URL 2004 Web KNIT5 Fortinet FortiGate 1500D captive portal Web 1

5 2 LAN LAN Web VPN IEEE802.1X TKIP SSID KNIT5-OPEN WPA-PSK(TKIP) g/n ID WPA2-PSK(AES) a/n/ac KNIT5-STAFF WPA2-PSK(AES) g/n a/n/ac KNIT5-GUEST g/n Web Wi-Fi WPA2-PSK(AES) g/n a/n/ac eduroam eduroam WPA2-EAP(AES) g/n a/n/ac eduroam 1 Username: ID ID ID ID PC Moodle ID ID KNIT5 L2TP/IPsec VPN VPN Web VPN ID VPN ID LAN VPN IP LAN LAN IP KNIT5-STAFF PC 2 IP SSID WPA2-PSK LAN

6 3.1.3 KNIT5-GUEST 2 NAPT NAPT Web VPN LAN LAN LAN LAN ID SSID WEP WPA eduroam 8) eduroam LAN eduroam eduroam eduroam LAN ID LAN LAN 2008 FREESPOT LAN FREESPOT Cisco Aironet 2702e LAN LAN FREESPOT LAN SSID Web

7 Accept LAN LAN LAN MAC KNIT5 Fortinet FortiGate 1500D Web SINET ISP VLAN SMS Wi-Fi LAN 512 VLAN LAN 16 SSID VLAN SSID Wi-Fi Wi-Fi SSID LAN Wi-Fi SSID VLAN 3.2 Wi-Fi NTT KDDI LAN Wi-Fi Wi-Fi 3G LTE LAN Wi-Fi LAN Wi-Fi Wi-Fi Wi-Fi Wi-Fi LAN Wi-Fi 2012 au Wi-Fi SPOT

8 LAN Wi-Fi 6) LAN LAN Wi-Fi Wi-Fi KNIT5 LAN Wi-Fi docomo Wi-Fi au Wi-Fi Wi-Fi LAN LAN LAN docomo Wi-Fi NTT au Wi-Fi Wi-Fi LAN VLAN Wi-Fi VLAN LAN SSID LAN Wi-Fi LAN Wi-Fi 3 LAN SSID Wi-Fi NTT docomo Wi-Fi KDDI Wi Wi-Fi docomo Wi-Fi 0000docomo, 0001docomo docomo Wi-Fi NTT LAN 300 Android ios Windows Mac OS X SSID 0000docomo 0001docomo Web SIM SSID

9 3 LAN Wi-Fi SSID NTT KDDI 0000docomo WPA2-PSK(AES) g/n a/n/ac 0001docomo WPA2-EAP(AES) g/n a/n/ac docomo Wi-Fi Wi2 g/n Wi au Wi-Fi SPOT Wi2_club WPA2-PSK(AES) g/n 0001softbank g/n Wi-Fi SWS1day g/n Wi-Fi (EX).FREE_Wi-Fi_PASSPORT g/n Wi Wi2, Wi2_club Wi KDDI LAN 362 au LAN au Wi-Fi SPOT Wi KDDI au Wi-Fi SPOT Wi KDDI LAN LAN Wi Wi2 Wi2_club SSID WPA2-PSK(AES) SSID NTT KDDI au Windows Mac OS X Wi-Fi 0001softbank, SWS1day,.FREE_Wi-Fi_PASSPORT Wi-Fi LAN Wi-Fi BB 467 LAN Wi-Fi SSID 0001softbank LAN SSL VPN Wi-Fi Wi-Fi (EX) SSID SWS1day FREE_Wi-Fi_PASSPORT SSID 4. LAN LAN Cisco Prime Infrastructure Wi- Fi

10 Wi-Fi 4.1 LAN LAN 3 LAN LAN 2016 LAN LAN 3 LAN LAN LAN LAN , LAN LAN LAN LAN LAN LAN 7, LAN LAN ,269 LAN 7,500 LAN 2,500 LAN 7,000

11 4.3 LAN LAN 5GHz Wi-Fi NTT 5GHz 5GHz LAN 2.4GHz 5GHz LAN 5 IEEE802.11a 0.12% LAN 5GHz 5GHz LAN 5GHz IEEE802.11ac IEEE802.11ac Wi-Fi Wi-Fi 5 LAN IEEE802.11n 2.4GHz 5GHz IEEE802.11ac IEEE802.11n 5GHz GHz IEEE802.11ac 5GHz IEEE802.11n IEEE802.11ac PC 5GHz LAN 2.4GHz IEEE802.11n 62.7% IEEE802.11ac 29.8% 5GHz IEEE802.11n 7.1% IEEE802.11g 0.26% 6 LAN LAN 3 Wi-Fi Wi-Fi % Wi-Fi

12 Wi-Fi LAN 20% ID LAN LAN LAN LAN Wi-Fi Wi-Fi LAN LAN Wi-Fi Wi-Fi Wi-Fi LAN Wi- Fi LAN LAN LAN Wi-Fi LAN Wi-Fi LAN Wi-Fi LAN LAN LAN LAN IEEE802.1X LAN

13 KNIT5 LAN Wi-Fi (1) FREESPOT FREESPOT LAN http: // (2) NTT LAN flets-w.com/spot/ (3) KDDI au Wi-Fi SPOT smartphone/wifi/wifi-spot/ ( ) ( ) (4) No. 5 pp (5) Vol. 19 pp (6) LAN Wi-Fi Vol IOT-26 No. 7 pp (7) KAINS COM.CLUB Vol. 35 pp (8) eduroam JP https: //

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