IEEE802.11n LAN WiMAX(Mobile Worldwide Interoperability for Microwave Access) LTE(Long Term Evolution) IEEE LAN Bluetooth IEEE LAN
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1 23 IEEE802.11n LAN ( )
2 IEEE802.11n LAN WiMAX(Mobile Worldwide Interoperability for Microwave Access) LTE(Long Term Evolution) IEEE LAN Bluetooth IEEE LAN IEE E802.11n 600Mbps LAN MIMO(Multiple-Input Multiple- Output) 40MHz IEEE LAN LANIEEE802.11n IEEE802.11n LAN 40MHz IEEE802.11n LAN 40m IEEE802.11g 40MHz WIMNET i
3 Throughput Measurements of IEEE802.11n Wireless LAN and Application to Network Design Abstract In recent years,wireless communication has evolved rapidly, Moblie WiMAX(Mobile Worldwide Interoperability for Microwave Access) LTE(Long Term Evolution) IEEE wireless LAN, Bluetooth,etc., are rapidly spreading for the use of many wireless communication. In particular, IEEE802.11n has emerged as a new standards of IEEE wireless LAN in September, The transmission speed is improving sharply with the maximum transmission speed of 600Mbps. The space multiplex by MIMO (Multiple-Input Multiple-Output) and 40-MHz channel bonding, are used for the as communication technology, and it differs widely from the conventional IEEE wireless LAN technology. This study is intended to make the appropriate wireless network design using the wireless LAN IEEE802.11n. We do throughput measuring experiments in a university campus using the IEEE n wireless LAN access point for the network design. In the throughput measurement by communication distance, it turned out that a throughput falls rapidly. Moreover, the interference evaluation by the 40-MHz channel bonding ofserved the fall of the throughput by overlap of a channel. Next, the relation between communication distance and link transmission speed is applied to the wireless mesh network WIMNET simulator currently developed by our research group. This application performs correspondence to the arbitrary transmission speed based on real environment. Comparison with the conventional technique was performed in the simulation, and the validity of the proposal technique was shown. The throughput standard for a network design was created from the experimental result. Finally, The network design based on the throughput characteristic in real environments was performed, and the network was actually built and evaluated based on formation. By comparing the throughput standard and evaluation result for a network design, the indicator towards application to the network design of a survey result has been clarified. ii
4 ,,,,, vol. 110, no. 240, NS , pp , IEEE802.11n LAN,, iii
5 IEEE LAN IEEE802.11n iperf WIMNET WIMNET , AP iv
6 1 DLNA Digital Living Network Alliance IEEE LAN Local Area Network LAN AP:Access Point AP LAN LAN LAN Mbps IEEE802.11n IEEE n IEEE802.11n IEEE802.11a/b/g IEEE802.11n Mbps IEEE802.11n MIMO Multiple-Input Multiple-Output n MHz 40MHz Mbps LAN LAN 20 LAN SSID LAN LAN IEEE802.11n IEEE802.11n LAN WIMNET WIMNET 1
7 2 IEEE LAN IEEE802.11n 2.1 IEEE LAN LAN 1 LAN IEEE802.11b/g IEEE802.11b/g 2.4GHz IEEE802.11g 54Mbps 54Mbps 2.4GHz ISM Ind ustry Science Medical Bluetooth ISM 1: IEEE IEEE802.11a IEEE802.11b IEEE802.11g IEEE802.11n 1999/ / /6 2009/9 OFDM DSSS/CCK OFDM OFDM GHz GHz GHz GHz GHz GHz GHz 54Mbps 11Mbps 54Mbps Mbps 22Mbps MHz 22MHz 22MHz 22/40MHz 2.2 IEEE802.11n IEEE802.11n GHz 5.2GHz Mbps IEEE802.11a/b/g MIMO multiple-imput multiple-output n MHz 2
8 20MHz 40MHz IEEE802.11a/g 1 20MHz n IEE LAN MAC n n Mac Service Data Unit MSDU Message Protocol Data Unit MPDU 2 GI a/g GI
9 3 IEEE802.11n LAN LAN LAN LAN PC LAN LAN 3.1 LAN LAN LAN LAN 300Mbps 20MHz 144Mbps 2: PC 3: LAN CPU OS W760C UNITCOM core i3 370M (2.40 GHz) 2 GB Ubuntu11.10 WLI-UC-G300HP Buffalo IEEE b/g/n 1 13 ch 2x2 (mimo) 4: LAN LAN OS CPU speed Flash RAM Wireless NIC WZR-HP-G302H Buffalo IEEE b/g/n 1 13 ch Atheros AR7240 openwrt 400 MHz 4 MB 32 MB AR9280 2x2 (mimo) 4
10 3.2 iperf NLANR/DAST iperf iperf to TCP/UDP iperf LAN PC LAN LAN LAN PC 0m 5m PC LAN ch 5m IEEE802.11n 40MHz 20MHz TCP UDP iperf 5 iperf IEEE802.11g 1: IEEE802.11g/n TCP?? IEEE802.11g/n UDP TCP IEEE802.11n 40MHz 275m 20MHz 270m IEEE802.11g 160m UDP IEEE802.11n 40MHz 280m 20MHz 270m IEEE802.11g 155m 5
11 5: iperf TCP UDP 100 sec 100 sec Mbps window size 8.00 Kbyte 1470 byte 8.00 Kbyte 1470 byte IEEE802.11n 100m 1Mbps 2: IEEE802.11g/n TCP 6
12 3.4 LAN LAN LAN IEEE802.11n LAN 40MHz 40MHz 2.4GHz 1-5ch 9-13ch 20MHz 40MHz 20MHz LAN 1 5ch 40MHz LAN 1 5ch 40MHz 5 6 0MHz iperf TCP 40MHz IEEE802.11n 20M Hz 7 LAN m 6: 40MHz 7: 20MHz 1 1-5ch 1-5ch 40MHz 2 1-5ch 2-6ch 35MHz 3 1-5ch 3-7ch 30MHz 4 1-5ch 4-8ch 25MHz 5 1-5ch 5-9ch 20MHz 6 1-5ch 6-10ch 15MHz 7 1-5ch 7-11ch 10MHz 8 1-5ch 8-12ch 5MHz 9 1-5ch 9-13ch 0MHz 1 1ch 1ch 20MHz 2 1ch 2ch 15MHz 3 1ch 3ch 10MHz 4 1ch 4ch 5MHz 5 1ch 5ch 0MHz 6 1ch 6ch 0MHz 7 1ch 7ch 0MHz 8 1ch 8ch 0MHz 9 1ch 9ch 0MHz 10 1ch 10ch 0MHz 11 1ch 11ch 0MHz 12 1ch 12ch 0MHz 13 1ch 13ch 0MHz 7
13 3: MHz 40MHz 68Mbps 0MHz 190.4Mbps 20MHz 1ch 4ch 8
14 4: IEEE802.11n-40MHz 5: IEEE802.11n-20MHz 9
15 PC LAN GW LAN IEEE802.11n 40MHz 20MHz 6 LAN LAN 5m 3.1 iperf TCP 6 LAN LAN 6: 10
16 ?? 7 40MHz?? 20MHz 1 7: 40MHz 8: 20MHz 11
17 D306 D307 D308 12cm 9 LAN LAN 5m 10m 1ch IEEE802.11n 40MHz 20MHz 3.1 iperf TCP 9: 12
18 3.6.2 LAN 5m LAN 10m 8 40MHz 9 20MHz MHz 5m 98.2Mbps 15.2% 10m 69.0Mbps 29.8% 20MHz 5m 59.8Mbps 16.5% 10m 55.4Mbps 30.2% 8: 40MHz Mbps 9: 20MHz Mbps 13
19 IEEE MHz 40MHz 2.402GHz 2.442GHz 20MHz 2.422GHz 2.442GHz 2. LAN 40MHz 20MHz 5 20MHz MHz 20MHz 4. 15% 40MHz 20MHz 14
20 4 WIMNET, WIMNET 4.1, IEEE802.11n IEEE802.11n WIMNET AP AP ( ) WIMNET (AP ) AP x x x x < x x x x < 70 y = x x x x < x 110 (1) 4.2 WIMNET WIMNET ( 120Mbps) 1. WIMNET 0.2msec byte(12000bits) 12Kbits/0.2msec 60Mbps 0.1msec byte(12000bits) 12Kbits/0.1msec 120Mbps 2. 1 (a) i. =120/ (Mbps) ii. 2 15
21 0.0003x x x x < x x x x < 70 y = x x x x < x 110 (2) iii. 2 L = U = iv. L U 1 (b) i. = / ( ) ii. L U iii ,,C,WIMNET , WIMNET WIMNET AP,WIMNET,, ( ), GW( ) 125 GW 1000 PC 16
22 10: OS Ubuntu CPU AMD AMD Athlon(tm) II X2 240 Processor 2GB (5 5) AP AP GW AP AP AP 4.1 IEEE802.11n AP- IEEE802.11a, AP 10m 20m 30m 40m 50m 60m 70m 80m 90m 100m IEEE802.11n IEEE IEEE802.11n/g, AP GWAP AP AP AP 10: 17
23 4.3.3 WIMNET 11 WIMNET 11: 18
24 5 IEEE802.11n LAN AP IEEE802.11n 40MHz 0-40m y = 0.002x x x (3) 3.3 IEEE802.11n 20MHz 0-100m y = 0.005x x x (4) x m y Mbps 2. 40MHz 40MHz 5 2.4GHz LAN 20MHz 5 20MHz 20MHz 5 2.4GHz LAN LAN % LAN 19
25 5.2 2 AP 30Mbps IEEE802.11n AP 12: 2F 11: 12 AP AP (m) (Mbps) D D AP1 D D D D AP1 D D D203 D207 LAN 40MHz AP1(1-5ch) AP2 9-13ch 20
26 LAN 12 30Mbps AP 12: 12 (Mbps) (Mbps) D D AP1 D D D D AP2 D D
27 AP1,AP2,AP3 20MHz 144Mbps AP1 1ch AP2 13ch AP3 6ch 13: AP AP (m) (Mbps) (Mbps) AP1 D D AP2 D D D AP3 D D D : 13 D205 30Mbps
28 6 IEEE802.11n LAN WIMNET 2.4GHz 5.2GHz 20MHz 19 IEEE802.11n LAN 23
29 24
30 [1],,,,,, IEEE802.11g LAN,, vol. 109, no. 449, IN , pp , [2],,,,, NS , pp.63-68, Nov [3] B, Sep [4],,,,, NS2009, Oct [5],,, WIMNET, 3 pp Jan [6] [7] LAN (2008) [8] Technology@Intel Magazine n LAN, /10 [9] Technology@Intel Magazine LAN, /10 25
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