23 IEEE802.11n LAN 43422519 ( ) 24 2 6
IEEE802.11n LAN WiMAX(Mobile Worldwide Interoperability for Microwave Access) LTE(Long Term Evolution) IEEE802.11 LAN Bluetooth 2009 9 IEEE802.11 LAN IEE E802.11n 600Mbps LAN MIMO(Multiple-Input Multiple- Output) 40MHz IEEE802.11 LAN LANIEEE802.11n IEEE802.11n LAN 40MHz IEEE802.11n LAN 40m IEEE802.11g 40MHz WIMNET i
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) IEEE802.11 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 IEEE802.11 wireless LAN in September, 2009. 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 IEEE802.11 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 802.11n 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
,,,,, vol. 110, no. 240, NS2010-82, pp. 69-74, 2010 10. IEEE802.11n LAN,, 2012 3. iii
1 1 2 2 2.1 IEEE802.11 LAN................................. 2 2.2 IEEE802.11n...................................... 2 3 4 3.1......................................... 4 3.2 iperf.............................. 5 3.3..................................... 5 3.3.1..................................... 5 3.3.2..................................... 5 3.4.................................... 7 3.4.1..................................... 7 3.4.2..................................... 8 3.5.................................. 10 3.5.1..................................... 10 3.5.2..................................... 11 3.6...................................... 12 3.6.1..................................... 12 3.6.2..................................... 13 3.7..................................... 14 4 WIMNET 15 4.1................. 15 4.2 WIMNET........................... 15 4.3.............................. 16 4.3.1,.......................... 16 4.3.2............................. 17 4.3.3............................. 18 5 19 5.1................................ 19 5.2 2 AP............................. 20 5.3......................................... 21 5.4........................................... 22 6 23 24 25 iv
1 DLNA Digital Living Network Alliance IEEE802.11 LAN Local Area Network LAN AP:Access Point AP LAN LAN LAN 2009 9 600Mbps IEEE802.11n IEEE802. 11n IEEE802.11n IEEE802.11a/b/g IEEE802.11n 150-600Mbps IEEE802.11n MIMO Multiple-Input Multiple-Output 2 2 11n 4 4 4 40MHz 40MHz 150-600Mbps LAN LAN 20 LAN SSID LAN LAN IEEE802.11n IEEE802.11n LAN WIMNET WIMNET 1
2 IEEE802.11 LAN IEEE802.11n 2.1 IEEE802.11 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: IEEE802.11 IEEE802.11a IEEE802.11b IEEE802.11g IEEE802.11n 1999/10 1999/10 2003/6 2009/9 OFDM DSSS/CCK OFDM OFDM 5.15-5.35GHz 2.4-2.5GHz 2.4-2.5GHz 2.4-2.5GHz 5.47-5.725GHz 5.15-5.35GHz 5.47-5.725GHz 54Mbps 11Mbps 54Mbps 150-600Mbps 22Mbps 1 1 1 1-4 20MHz 22MHz 22MHz 22/40MHz 2.2 IEEE802.11n IEEE802.11n 2009 9 2.4GHz 5.2GHz 150-600Mbps IEEE802.11a/b/g MIMO multiple-imput multiple-output 2 2 11n 4 4 4 40MHz 2
20MHz 40MHz IEEE802.11a/g 1 20MHz 48 802.11n 2 108 IEE802.11 LAN MAC 802.11n 2 802.11n Mac Service Data Unit MSDU Message Protocol Data Unit MPDU 2 GI 802.11a/g GI 800 400 3
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 IEEE802.11 b/g/n 1 13 ch 2x2 (mimo) 4: LAN LAN OS CPU speed Flash RAM Wireless NIC WZR-HP-G302H Buffalo IEEE802.11 b/g/n 1 13 ch Atheros AR7240 openwrt 400 MHz 4 MB 32 MB AR9280 2x2 (mimo) 4
3.2 iperf NLANR/DAST iperf http://dast.nlanr.net/projects/iperf/ iperf to TCP/UDP iperf2.0.5 3.3 LAN PC LAN LAN LAN PC 0m 5m 3.3.1 1 PC LAN ch 5m IEEE802.11n 40MHz 20MHz TCP UDP iperf 5 iperf IEEE802.11g 1: 3.3.2 2 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
5: iperf TCP UDP 100 sec 100 sec 5001 5001 300Mbps window size 8.00 Kbyte 1470 byte 8.00 Kbyte 1470 byte IEEE802.11n 100m 1Mbps 2: IEEE802.11g/n TCP 6
3.4 LAN LAN LAN IEEE802.11n LAN 40MHz 40MHz 2.4GHz 1-5ch 9-13ch 20MHz 40MHz 20MHz 3.4.1 3 LAN 1 5ch 40MHz LAN 1 5ch 40MHz 5 6 0MHz 3.3.1 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
3: 3.4.2 4 5 20MHz 40MHz 68Mbps 0MHz 190.4Mbps 20MHz 1ch 4ch 8
4: IEEE802.11n-40MHz 5: IEEE802.11n-20MHz 9
3.5 3.5.1 PC LAN GW LAN IEEE802.11n 40MHz 20MHz 6 LAN LAN 5m 3.1 iperf TCP 6 LAN LAN 6: 10
3.5.2 7?? 7 40MHz?? 20MHz 1 7: 40MHz 8: 20MHz 11
3.6 3.6.1 D306 D307 D308 12cm 9 LAN LAN 5m 10m 1ch IEEE802.11n 40MHz 20MHz 3.1 iperf TCP 9: 12
3.6.2 LAN 5m LAN 10m 8 40MHz 9 20MHz 3.3 40MHz 5m 98.2Mbps 15.2% 10m 69.0Mbps 29.8% 20MHz 5m 59.8Mbps 16.5% 10m 55.4Mbps 30.2% 8: 40MHz 1 2 3 4 5 83.4 84.1 82.2 83.4 83.1 83.2 49.7 51.2 47.3 47.4 46.9 48.5 Mbps 9: 20MHz 1 2 3 4 5 50.2 49.1 50.1 49.4 50.9 49.9 38.7 39.1 37.7 38.8 39.1 38.7 Mbps 13
3.7 1. IEEE802.11 40MHz 40MHz 2.402GHz 2.442GHz 20MHz 2.422GHz 2.442GHz 2. LAN 40MHz 20MHz 5 20MHz 5 3. 40MHz 20MHz 4. 15% 40MHz 20MHz 14
4 WIMNET, WIMNET 4.1, IEEE802.11n IEEE802.11n WIMNET AP AP ( ) WIMNET (AP ) AP 0.0003x 3 + 0.0662x 2 5.0817x + 110.68 0 x < 35 0.0002x 3 + 0.0517x 2 4.2118x + 114.26 35 x < 70 y = 0.0000007x 3 + 0.0004x 2 0.0914x + 6.4585 70 x < 110 1 x 110 (1) 4.2 WIMNET WIMNET ( 120Mbps) 1. WIMNET 0.2msec 1 1500byte(12000bits) 12Kbits/0.2msec 60Mbps 0.1msec 1 1500byte(12000bits) 12Kbits/0.1msec 120Mbps 2. 1 (a) i. =120/ (Mbps) ii. 2 15
0.0003x 3 + 0.0662x 2 5.0817x + 110.68 0 x < 35 0.0002x 3 + 0.0517x 2 4.2118x + 114.26 35 x < 70 y = 0.0000007x 3 + 0.0004x 2 0.0914x + 6.4585 70 x < 110 1 x 110 (2) iii. 2 L = U = iv. L U 1 (b) i. = / ( ) ii. L U iii. + ++1 4.3,,C,WIMNET. 4.3.1, WIMNET WIMNET AP,WIMNET,, ( ), GW( ) 125 GW 1000 PC 16
10: OS Ubuntu 10.10 CPU AMD AMD Athlon(tm) II X2 240 Processor 2GB 4.3.2 10 25(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 IEEE802.11 IEEE802.11n/g, AP GWAP AP AP AP 10: 17
4.3.3 WIMNET 11 WIMNET 11: 18
5 IEEE802.11n LAN AP 5.1 1. 3.3 IEEE802.11n 40MHz 0-40m y = 0.002x 3 + 0.19x 2 6.9531x + 117.74 (3) 3.3 IEEE802.11n 20MHz 0-100m y = 0.005x 3 + 0.0066x 2 1.0142x + 63.328 (4) x m y Mbps 2. 40MHz 40MHz 5 2.4GHz LAN 20MHz 5 20MHz 20MHz 5 2.4GHz LAN 3. 3.3 LAN 4. 3.4 15% LAN 19
5.2 2 AP 30Mbps IEEE802.11n AP 12: 2F 11: 12 AP AP (m) (Mbps) D201 9 1 58.7 D202 12.4 2 36.8 AP1 D203 3.3 0 96.8 D204 12.7 2 39.1 D205 14 1 44.3 D206 3.6 1 80.8 AP1 D207 4.8 0 88.5 D208 9.4 2 47.2 12.1 1 43.4 12 D203 D207 LAN 40MHz AP1(1-5ch) AP2 9-13ch 20
5.3 3.1 LAN 12 30Mbps AP 12: 12 (Mbps) (Mbps) D201 52.1-6.6 D202 32.1-4.7 AP1 D203 92.1-4.7 D204 32.4-6.7 D205 33.1-11.2 D206 76.4-4.4 AP2 D207 85.3-3.2 D208 42.1-5.1 45.0 1.6 21
5.4 13 13 AP1,AP2,AP3 20MHz 144Mbps AP1 1ch AP2 13ch AP3 6ch 13: AP AP (m) (Mbps) (Mbps) AP1 D202 3.2 0 60.0 54.4 D204 7.1 1 47.4 42.1 AP2 D201 9 1 45.3 39.5 D203 3.3 0 60.0 57.1 D205 14 1 38.2 28.1 AP3 D206 3.6 1 50.7 44.4 D207 4.8 0 58.4 52.3 D208 9.4 1 44.8 39.7 12.1 1 41.2 43.1 13: 13 D205 30Mbps 5.3 5.4 22
6 IEEE802.11n LAN WIMNET 2.4GHz 5.2GHz 20MHz 19 IEEE802.11n LAN 23
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