EPON????????

1
EPON????????
OLT (??20KM???)
???
??
???
ONU
ONU
IP ???
ONU
???
ONU
2
????
dB????????, ???????dB 10logX????????????A??????
B??????dB?,????10 lg A/B?????A???B?????,??10 lg
A/B 10 lg 2 3dB?????,A????B????3dB??A????46dB
m,B????40dBm,????,A?B?6dB??A???12dBd,B???14dBd,??
?A?B?2dB? dBm?????????????, dBm ???? miliwatt?
0 dBm 10log1 mw?????10lg???/1mW??????????1mW,
?dBm???????????10 lg 1mW/1mW 0dBm??40W???,?10
lg(40W/1mW)46dBm ???dBm ?????dBm?,??????dB??30
dBm - 0dBm 30dB? ????,????,dB?dB??????,???????
???????dBm ? dBm ??????????,????????????????(SNR)
?
3
?????
????EPON?????????????????????OLT???ONU?????????,??
???????????????????????????,???1?2?1?4?1?8?1?16?1?
32????????1?2????,????????(5050)??????(595?4060
?2575)?????????????,????????????????????????,????
??????????????????????????(OLT)? ??????????,?????
??,?????????,????????????????,?????(??)???????????
??????????,???dB ??,??????????????????????????????
?????? ???????????????????,???????,????,????????
????,????????????????????,????????????????????????
???
4
?????1
?? ???? ?? ??? ????? ??????(??dB??????) ????(mm) ????
????-??-14-??-SC/PC(????) 1310/-40 1520/-40 14 ?? 7.8 ??110mm80mm10mm SC/PC
????-??-18-??-SC/PC(????) 1310/-40 1520/-40 18 ?? 11.0 ??135mm96mm18mm SC/PC
????-??-116-??-SC/PC(????) 1310/-40 1520/-40 116 ?? 15.0 ??160mm120mm18mm SC/PC
????-??-132-??-SC/PC(????) 1310/-40 1520/-40 132 ?? 18.7 ??120mm160mm20mm SC/PC
????-??-232-??-SC/PC-(????) 1310/-40 1520/-40 132 ?? 18.7 ??120mm160mm20mm SC/PC
????-??-132-??-SC/PC-1U??(????) 1310/-40 1520/-40 132 ?? 18.7 ??483mm297mm48mm 1U??? SC/UPC
5
?????2
?? ???? ?? ??? ????? ??????(??dB??????) ????(mm) ????
????-??-12-595-SC/PC(????) 1310/-40 1520/-40 12 595 15.0dB(5) 0.6dB(95) ??90mm20mm10mm SC/PC
????-??-12-??-SC/PC(????) 1310/-40 1520/-40 12 5050 3.8 ??90mm20mm10mm SC/PC
????-??-12-4060-SC/PC(????) 1310/-40 1520/-40 12 4060 5.0dB(40) 3.0dB(60) ??90mm20mm10mm SC/PC
????-??-12-2575-SC/PC(????) 1310/-40 1520/-40 12 2575 7.2dB(25) 1.9dB(75) ??90mm20mm10mm SC/PC
6
?????3
??????????? ????-3065?,RH 5-95 ????????(?????
/????),??????????????????????????,???????????? ???
??????????,????? ????????????????,??????,???????
????????? lt 5 ?? ???? ????????????????? ????
???????? ???? gt 10? ??????????,??????,??,?????
?,?????,??116,132??,???????????????????
7
OLT/ONU?????
???? 10KMOLT?????? 10KMONU?????? 20KMOLT?????? 20KMONU??????
????? -24dBm -24dBm -27dBm -24dBm
????? -1dBm -3dBm -6dBm -3dBm
????? -32dBm -14dBm 27dBm -14dBm
8
??????
EPON????OLT??????ONU?????????G.652??????????G.652?
???????????? ? EPON????10KM?20KM???????????20KM??
????20KM?????OLT???ONU?????????????ONU????????? ?
????????????,????????????????,??????
?20km?????116???????????5KM???????????30dB,????
???????5KM ???EPON??,????????,????????20KM???OLT
???
9
??????
EPON??????,??????????????,???????,??ONU??????????
?-24dBm,????-8dBm ?????????????? 1?????????ONU,??
?????????,??ONU????????ONU????????-3dBm 2
???????????????-24dBm,???????ONU??????,OLT????ONU?
?????????????,????????????,?????????????????? 3
??????????,????????????????,???????????,??????????
??????????? ? -8dBm????ONU????????????,??ONU????
?????,????????????????5050?2575?????
10
??????????
?? ONU?????? OLT?????- ???? ???? ??????????
???????(KM)0.3?????0.1?????0.2
0.35dB?1310nm????????? 0.3dB?1490nm?????????,???
0.3dB ????????0.1dB??? ????????0.2dB??? ?????????
???????? OLT ???????????
11
???????
??????????????????? ?????,??????????????,?????????
??????,???????????
12
??????1
OLT
0km
95
3km
95
5km
9km
50
8km
95
ONU6
5
5
50
5
50
??20km
4.5km
50
1km
ONU1
ONU2
ONU3
ONU4
ONU5
?????ONU??????2????,???????,???????20.2?dB ONU1??
?? 154.50.320.216.75dB (15?5???????,4.50.3
????????) ONU2???? 0.6153.880.320.222.2dB
ONU3???? 0.6153.8(81)0.320.222.5dB
ONU4???? 0.6215(83)0.320.219.9dB ONU5???
? 0.633.8(835)0.320.210.8dB ONU6????
0.633.8(8359)0.320.213.5dB 20KMOLT?????
27dBm,??????,????-8-24dBm???? ???????????OK,??ON
U???????
13
??????2,?????,?????,??23?
0.1km
0.1km
0.1km
0.1km
0.1km
0.1km
0.1km
OLT
0.1km
95
95
75
95
75
75
75
60
50
95

A
5
5
5
25
5
25
25
25
40
50
ONU13
ONU3
ONUX
ONU1
ONU2
ONU8
ONU9
ONU11
ONU10
ONU12
ONU1???? 15(0.1KM)0.320.215.43dB ONU2????
0.6115(0.2KM)0.320.216.06dB ONU3????
0.6215(0.3KM)0.320.216.69dB ONUX????
(X-1)0.615(0.1KMX)0.320.2lt26dB
X17 A????170.6(170.1KM)0.310.2
10.91 ONU8???? 10.910.10.37.20.2
18.34dB ONU9???? 20.27dB ONU10??? 22.2
ONU11??? 24.13 ONU12???23.63 ONU13????
25.43dB ??????23??
14
??????3,???????,??18?
0.1km
0.1km
0.1km
0.1km
0.1km
0.1km
0.1km
OLT
10km
95
75
95
75
75
75
60
50
95

A
5
5
25
5
25
25
25
40
50
ONU13
ONUX
ONU1
ONU2
ONU8
ONU9
ONU11
ONU10
ONU12
ONU1???? 15(10KM)0.320.218.4dB ONU2????
0.6115(10.1KM)0.320.219.03dB ONUX????
(X-1)0.615(10KM0.1KMX)0.320.2lt26dB
X12 A????120.6(10120.1KM)0.310.2
10.76 ONU8???? 10.760.10.37.20.2
18.19dB ONU9???? 20.12dB ONU10??? 22.05
ONU11??? 23.88 ONU12???23.48 ONU13????
25.28dB ??????18??
15
??????4,????30KM,??7?
OLT
0km
95
3km
95
5km
3km
95
75
6km
75
50
5km
8km
95
ONU9
5
5
25
5
5
25
50
A
4.5km
ONU5
ONU4
ONU1
ONU2
ONU6
ONU7
ONU8
????????? ONU5???? 0.6415(835)0.320.222.
6dB ONU6???? 0.647.2(8356)0.320.216.6dB
ONU7???? 0.641.97.2(83563)0.320.219.
4dB A???? 0.641.92(83563)0.310.213.9d
B ONU8,9???? 19.4dB ??,??????????????,?????7??
?10KM????,???5?????
16
??--????
?????????,ONU????,??????????????????? ????????????
?????,??EPON????,??????????(30KM??)
OLT
50KM
OLT
132
50
??OLT??????32?ONU
50
12
???????ONU??????,???
OLT
25
10KM
95
25
5
????????,?????,???
10KM
OLT
95
95
5
5
10KM
????????,?????,???
18
17
????????????
1?????(???,????????)????ODF????????? 2?????(???
???????),?????????????,????6cm?????,??????????? 3
?????????????,???????????,??????,?????????? 4????
????,????????,???????????????????????????????????
? 5????????????????,??????????,?????????????????
????,?????????????????,??? 6?ONU??????????,??????
???????,???????????????? 7?ONU????????,?????????
???????,???? 8????????,????????????????,????????
?????????ONU??? ???????????????/???????????????
???????????