March.20.2008

ICSA)

2010

11

ARIB)

2

L3-SWL2-SW

LANAP

Ethernet

2

L3-SWL2-SW

LANAP

Ethernet

(1Gbps) 25GHz

25GHz

-1

25GHz 2.4GHz( )

Canobeam DT-130 ( )

NTG-2500 ( )

CV-2410G 1.25Gbps 80Mbps

( 64Mbps) IEEE802.11b/g

54Mbps

-2,25GHz,2.4GHz

)1 PC

( )23 25GHz

)1 Web

( +25GHz)

2

1 ( ) 1

-1

0

10

20

30

40

50

60

70

80

90

100

11/29 12/4 12/9 12/14 12/19 12/24Time [mm/dd]

Thro

ughp

ut [M

bps]

25GHz

1

-2

25GHz

10

100

1000

10000

100000

0:00 6:00 12:00 18:00 0:00

Time(hh:mm)

Vis

ivili

ty(m

)

0

2

4

6

8

Rai

n(m

m)

Visivility Rain OPTRX-AVE OPTRX-Limit200

50

100

150

OPT

RX

Dec.22.2007

-3

10

100

1000

10000

100000

0:00 6:00 12:00 18:00 0:00

Time(hh:mm)

Vis

ivili

ty(m

)

0

2

4

6

8

Rai

n(m

m)

Visivility Rain Throughput100

40

60

80

Thr

ough

put(

Mbp

s)

Dec.22.2007

25GHz

-1

Google Earth

-2

L2-WS PC

25GH

RSTL2-WS

PC

25GH

LAN-AP

BB

Gbit-Ethernet

100M-Ethernet

1.9km

L2-WS PC

25GH

RSTL2-WS

PC

25GH

LAN-AP

BB

Gbit-Ethernet

100M-Ethernet

1.9km

25GHz 2.4GHz

C10370 SINELINK25G BUFFALO

WZR-G144NH/P 1.25Gbps 150Mbps(64QAMmode)

( 56Mbps) Draft IEEE802.11n ( 54Mbps)

-125GHz

4.4.9

2007.11.20Throughput interval 1min. / size:64Mbyte / packet size:8kbyte

Ping size 1472byte

0

10

20

30

40

50

60

70

80

90

15:00 16:00 17:00 18:00 19:00 20:00

Time [hh:mm]

Thro

ughp

ut [M

bps]

/ R

ain

rate

[mm

/h]

Rec

. pow

er [r

elat

ive

valu

e]

1.0E-05

1.0E-04

1.0E-03

1.0E-02

Ping

loss

rate

[%]

Visi

bilit

y [k

m]

Ping

loss free

1

10

100

-2Throughput:5

1

-3

0

10

20

30

40

50

60

70

80

90

100

3:00 6:00 9:00 12:00

Time [hh:mm]

1.0E-05

1.0E-04

1.0E-03

1.0E-02

1.0E-01

1.0E+00

Ping

loss

rat

e [%

]

Ping

loss free

-4

RSSI 11/25

RSSI

11 20 21 RSSI

25GHz

-5

Period 2000 2007

0.001

0.01

0.1

1

10

0.1 1 10

1.24km

Vlim 13/M L M 20dB L 1.9kmVlim 1.24 [km]

13/V [db/km] V

100m

LAN

20Mbps

Mbps

10Mbps

20Mbps

Mbps

10MbpsMbps

.11n AP --- PC card

Mbps

10Mbps

0.1

1

10

100

14:20 14:30 14:40 14:50

Time [hh:mm]

ADSL 200kbps

10

BBBB

BB BB

HP 1

BB

25GHz back-upFTTH

---100% all or nothing

ARIB)

30 50 60 60

ISDN

NW FTTH

FTTH

50% 100%

30 50 60 6030 50 60 60

ISDNISDN

NW FTTH

FTTHFTTH

50% 100%

504020 30

FTTH

50 100

60504020 30

FTTH

50 100

60504020 30

FTTH

50 100

60

0

20

40

60

80

100

12:00 15:00 18:00 21:00 0:00 3:00 6:00 9:00 12:00

Time [hh:mm]

[ ] [ ]

Filter

Web ( 25G)

0

1

2

3

4

5

6

12/4 12/7 12/11 12/14 12/17 12/21 12/24Time [mm/dd]

Thro

ughp

ut [M

bps]

25G)

0

1

2

3

4

5

6

12/4 12/7 12/11 12/14 12/17 12/21 12/24

Time [mm/dd]Th

roug

hput

[Mbp

s]

Web

or

(

or

(

100K

10G

1G

100M

10M

1M

1T

100G

10M

100M

1G

2.5G10G

WDM)

LANP-MP

100M P-MP)

ISDN

FTTHFTTH 1G

1G-Ethernet

10G-Ether

100G-Ether

SONET

WDM

ADSL1.5M

8M12M 24M

FWA 1.5M(22 26G)

FWA 10M(22 26G)

FWA 50M(5GHz)

FWA 46M(26G)

IEEE802.11b

11g11a

CATVFPU)

ICSA

H16-17

RoFSOBB

Bit rate/ Protocol/Topology Free

19

O/E E/ORF

2.5Gbps WDM

Radio on FSO

LAN

Fiber

Fiber