LAN

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ゆずさすみい
5 years ago
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1 HUB

2 LAN A 24 A A i

3 1 LSI 1

4 2

5 2 [1] LAN LAN LAN 2.1 PHS [2] 3

6 Mbps Gbps [3] PC, IrDA LED LED HUB HUB ( 2.1) HUB HUB HUB LAN 4

7 光無線ハブ光素子横 80cm 縦 80cm 円がセル移動する 2.1: HUB 5

8 2.1.2 LAN LAN LAN LAN IEEE PDA LAN LAN LAN ( DSSS FHSS ) IrDA 2.4GHz 5GHz 2.4GHz 5GHz PC DSSS Direct Sequence Spread Spectrum BPSK PN FHSS 4FSK BPSK 6

9 ISM 2Mbps 3 10m LAN LAN IrDA LAN LAN LAN [4] LAN LAN LAN LAN LAN LAN LAN LAN LAN LAN 7

10 2.2 [5] PHS PDC PHS 1 A A 8

11 基地局 A 基地局 B (1) (2) (3) セル 2.2: 9

12 ( 2.2-1) B A A B B ( 2.2-2) B A B ( 2.2-3) CDMA [6] A A ( 2.3-1) A B A B ( 2.3-2) B A B ( 2.3(3)) 10

13 基地局 A 基地局 B (1) (2) (3) セル 2.3: 11

14 3 HUB HUB HUB HUB 3.1 ( 3.1) HUB 12

15 電波強度 ( 強 ) 無線ブリッジ電波強度 ( 弱 ) 無線ブリッジ通信中電波強度によってによって接続接続を切り替える電波強度 ( 弱 ) 無線ブリッジ電波強度 ( 強 ) 無線ブリッジ通信中 3.1: 13

16 3.2 PC PC PC 2 PC HUB 2 PC 2 HUB ( 3.2) データー送信用 PC ハブブリッジブリッジデータ受信用 PC 3.2: 14

17 4 PC PC PC 2 ( 4.1) PC 2 PC PC 50 2 PC PC IP ES- SID(SSID) ch( ) MAC PC ( exp125 4 ) IP ESSID (SSID) exp125 4 ch( ) 15

18 4.1: 5 MAC ( ) 00.16:01:26:30:81 MAC ( ) 00.16:01:26:30:80 ( exp125 5 ) IP ESSID (SSID) exp125 5 ch( ) 8 MAC ( ) 00:16:01:26:30:6F MAC ( ) 16

19 00:16:01:26:30:6E PC IP PC IP ( 4.2) PC PC PC 2 2 ( 4.3) exp125 4 exp exp125 4 exp125 5 ( ) 17

20 電波無線ブリッジ (4) 電波無線ブリッジ (5) IP アドレス ESSID(SSID) exp125_ exp125_5 ch 5 8 MAC アドレス ( 有線 ) 00.16:01:26:30: :01:26:30:6F MAC アドレス ( 無線 ) 00.16:01:26:30: :01:26:30:6E IP アドレスデータ送信用 PC データ受信用 PC : 18

21 円がセル電波強度 ( 弱 ) ブリッジ 2 電波強度 ( 強 ) ブリッジ 1 HUB 電波強度 ( 強 ) ブリッジ 2 電波強度 ( 弱 ) ブリッジ 1 HUB 4.3: 19

22 電波強度 exp125_4 exp125_5 exp125_4 時間 exp125_4 exp125_5 電波強度 : 時間 exp125_4 exp125_5 4.5: 2 20

23 5 HUB PC PC 21

24 22

25 [1] [2] [3] [4] lan available at list/wireless/knowl.html, (accessed ). [5] [6]

26 A A.1 #!/bin/sh count=1 while [ $count -le 50 ]; do sudo sh iwlist.sh count= expr $count + 1 sleep 3 done A.2 #!/bin/sh sudo iwlist wlan0 scanning > iwlist.log sudo grep -A 4 exp125_4 iwlist.log > exp125_4.log sudo grep -A 4 exp125_5 iwlist.log > exp125_5.log sudo grep level exp125_4.log cut -d" " -f24 cut -c7- > level4.log sudo grep level exp125_4.log cut -d" " -f24 cut -c7- >> log4.log sudo grep level exp125_5.log cut -d" " -f24 cut -c7- > level5.log sudo grep level exp125_5.log cut -d" " -f24 cut -c7- >> log5.log sudo iwconfig wlan0 >> essid.log txpower4= cat level4.log 24

27 txpower5= cat level5.log if [ ${txpower4} -gt ${txpower5} ] then sudo iwconfig wlan0 essid exp125_4 #sudo iwconfig wlan0 #sudo iwconfig wlan0 >> essid.log elif [ ${txpower5} -gt ${txpower4} ] then sudo iwconfig wlan0 essid exp125_5 #sudo iwconfig wlan0 #sudo iwconfig wlan0 >> essid.log fi #echo "exp_4 txpower = ${txpower4}" #echo "exp_5 txpower = ${txpower5}" #time= date awk {print $5;} time= perl -e use Time::HiRes qw(gettimeofday); my($sec,$microsec)=gettimeofday(); $curdate=localtime($sec); print $curdate. " ". $microsec; time= echo $time awk {print $4,$6;} time= echo $time sed -e "s/:/ /g" awk {print $3,$4;} cut -c 1-6 sed -e "s/ /,/g" time= echo $time sed -e "s/\n//g" essid= iwconfig wlan0 grep "ESSID" sed -e "s/\"//g" sed -e "s/essid://g" awk {print $4} echo "$time,${txpower4},${txpower5},$essid" echo "$time,${txpower4},${txpower5},$essid" >> log.txt 25

完成卒論.PDF

完成卒論.PDF LAN 4 9920449 2 0 LAN Bluetooth LAN 1 LAN LAN LAN LAN 2 LAN Bluetooth LAN Bluetooth 3 Bluetooth 4 Bluetooth 5 Bluetooth Bluetooth 6 LAN Bluetooth LAN LocalAreaNetwork 1 LAN LAN LAN LAN Ethernet Ethernet