WMN MBCR 1155056 25 2 12
1 1 2 3 2.1.............................. 3 2.2 Wireless Mesh Networks............................. 3 2.3............................. 3 2.3.1.............................. 4 2.4......................... 5 2.5.................................. 5 2.6.................................. 6 2.6.1............................. 6 2.6.2 walfitch-............................ 6 2.6.3......................... 7 3 MBCR 9 3.1........................................ 9 3.2................................. 9 3.2.1......................... 10 3.3................................... 14 3.4 MBCR.................................. 15 3.5........................................ 15 4 18 4.1....................... 18 i
4.2...................................... 18 4.3...................................... 19 4.4............................ 20 4.5......................... 21 4.6.................................. 22 4.7.............................. 29 4.8.................. 30 4.9.................................. 30 4.10............................... 32 5 33 34 36 ii
1 LAN. LAN. LAN Wireless Mesh Networks(WMN) [1]. WMN.WMN.WMN.WMN.. MBCR... 2.2.. 1
... MBCR. MBCR. WMN MBCR. MBCR. 2
2 2.1....... 2.2 Wireless Mesh Networks Wireless Mesh Netrorks(WMN).WMN. 2.3 WMN. IP 3
.WMN. WMN.WMN. 2.3.1 WMN.. 2.1... 2.1: 4
2.4 WMN... 2.5 LAN 2.4Gh... [2]. [2].. 2.... 5
. 2.6 2.6.1 [2] ( 2.1 2.2).. G f Lf[dB]. [cm] d[m]. Lf = 1 G f (2.1) G f = ( λ 4dπ )2 (2.2) 2.6.2 walfitch- walfitch- [3] 1km.. 2.32.8.L [db]f [MHz]h b [m]h m [m]d [km]b [m]w [m]h roof [m]φ (0 90). 2.1. 2.1 φ. 6
L = L 0 + L rts + L msd (2.3) L 0 = 32.4 + 20 log f + 20 log d (2.4) 10 + 0.354φ(0 φ 35) L rts = 16.9 10 log w+10 log f +20 log h m + 2.5 + 0.075(φ 35)(35 φ 55) (2.5) 4 0.114(φ 55)(55 φ 90) ( 4 + 0.7(f/925 1)) log f() L msd = 54 18 log(1 + h b ) + 18 log d 9 log b + ( 4 + 1.5(f/925 1)) log f() (2.6) h b = h b h roof (h b > h rooh ) (2.7) h m = h roof h m (h roof > h m ) (2.8) 2.6.3 [4]. 100[m]. 3. 2 3 7
2.2: walfitch-.... 2.9.L [db]f [MHz]d [m]n ( 2.1)Lf ( 2.1)n. L = 20 log f + N log d + Lf(n) 28 (2.9) 2.1: N Lf [GHz] 2.45 2.45 2.45 N 28 28 30 Lf[dB] 10 5 14 8
3 MBCR 3.1 [5] MBCR..... 3.2 MBCR. 3.1...... 0 1. 1 0. 9
3.1: 3.2.1. 3.2 A B B A B. A A B.... 3.2: 10
3.2. 3.2 ABCD. 0 1. 3. 1 D 1 1. B D. D B D D 1 B 0. B. 2 C 1 0. A C. C 1. A C C. 3 2. 3 2. 1. 3.4. 2. 3.4 C A B 0 0.5 2.. 11
3.3: 1 2. 3.4 D B C D. 2 1 2. 3.5. D B C B. B D C D.. 12
3.4: 3-1 3.5: 3-2 13
3.3 3.4. 3.4.. 3.4 0.5 A 2.4. 1.9. B 1.2. 0.7. 1.9 0.7... 3.6: 14
3.4 MBCR WMN.MBCR.. 3.5 MBCR. C.. ESSID... 1 2 3-2. 3.7. 0 1.. 3.8. ESSIDIPaddress.. 15
3.7: 1 3.8: 2 16
3.9.. 1... 3.9: 1 17
4 4.1 MBCR WMN.... WMN MBCR.... 4.2.. 30[cm] 1 600.25[m] 150[m] 10m. 18
4.1: 30[cm] 2.442[GHz] 31.6227[mW] 4.3 4.1 4.2. 4.1: 19
4.2: 4.4 4.1. 4.2. ( 30[cm]) 50[m] 1. 30[cm] MBCR.. 3.8[m] 4[m]. 4[m]. 20
1. 4.5.. 0 1.0. 14bit 1bit 3bit 10bit.0 1.0. 1[dBm]. 3. 3 2.... LAN 300[m] [6]. LAN 200[mw]. LAN IEEE802.11g [4].IEEE802.11g LAN Cisco [7]. IEEE802.11g -70[dBm] 54[Mbps]. 23[dBm] 300[m] 300[m]. 21
.Cisco. 4.2: walfitch- [mw] 200 200 200 [GHz] 2.442 2.442 2.442 hroof[m] 3 - - hb[m] 4 - - hm[m] 1 - - b[m] 1 - - w[m] 1 - - 0 - - - - N - 28 - Lf[dB] - 0() - 4.3: [dbm] -93-91 -88-86 -85-85 -84-83 -79-77 -72-70 [Mbps] 1 2 5.5 6 9 11 12 18 24 38 48 54 4.6 4.34.74.11. 4.44.84.12. 4.54.94.13. 4.64.104.14. 22
4.3: 4.4: () 23
4.5: 4.6: () 24
4.7: walfitch- 4.8: walfitch- () 25
4.9: walfitch- 4.10: walfitch- () 26
4.11: 4.12: () 27
4.13: 4.14: () 28
4.7 4.3 4.6. 23[dBm] -67[dBm] 91[dBm] 4.6 23[dBm] -22[dBm] 1[dBm]. -22[dBm] -67[dBm] 45[dB]. 4.7 4.10 walfitch-. 23[dBm] -95[dBm] 119[dBm] 4.10 23[dBm] -24[dBm] 1[dBm]. -25[dBm] -95[dBm] 71[dB]. 4.11 4.14. 23[dBm] -101[dBm] 125[dBm] 4.14 23[dBm] -43[dBm] 1[dBm]. -44[dBm] -101[dBm] 58[dB]. Cisco -22[dBm] -67[dBm] walfitch--25[dbm] -93[dBm] -44[dBm] -93[dBm]. 3 walfitch--25[dbm] -93[dBm] 70[dB]. 70[dBm] walfitch-. 29
4.8.. 4 4.4.. 10. 4.4: A hp Compaq nx6320 intel PRO/Wireless 3945ABG B hp Compaq nx6320 intel PRO/Wireless 3945ABG C panasonic CF-R5 intel PRO/Wireless 3945ABG D panasonic CF-R5 intel PRO/Wireless 3945ABG [GHz] [dbm] 2.442 8ch 15 IEEE 802.11g 2.442 8ch 15 IEEE 802.11g 2.442 8ch 15 IEEE 802.11g 2.442 8ch 15 IEEE 802.11g 4.9. 10 6 4. 30
4.5: 1 A 0 0 1 B 0.099609,0 0,0 2 C 0.435547 1 1 D 0.099609,0.279297 0,1 2 4.6: 2 A 0 0 1 B 0.233398,0 0,0 2 C 0.360352 1 1 D 0.233398,0.162109 0,1 2 4.7: 3 A 0 0 1 B 0.061523,0 0,0 1 C 0.223633 1 1 D 0.061523,0.152344 0,1 2 4.8: 4 A 0,0.414062 0,1 2 B 0,0 0,0 2 C 0,0.279297 0,0 2 D 0.105469 1 1 31
4.10.4 4.58.. 10 6.. 32
5 WMN.. 30[cm] MBCR. 4[m].. 1.0 0 10bit. 1[dBm]. 3. -25[dBm] -93[dBm] walfitch-. MBCR MBCR.10 6.. 4[m]. 4[m]. walfitch- 33
-25[dBm]. MBCR MBCR. 34
.... 35
[1] 2007. [2] 2005. [3] () 2010 700/900MHz ( 5 ) 81-700/900 5-5. [4] 802.11 LAN 1 2005. [5] vol.1071 20082008 1 24 () 1 25 () (LOIS, ICM, IA). [6] LAN 4 2004. [7] Cisco Aironet 1130G IEEE802.11g 2009. 36