kommunikatsiooniteenuste arendus (irt0080)b-pon + dsl t opl o gy fileed tlc atev w h mou nt 4 31 7 7...
TRANSCRIPT
Taristu
2
Optical Transmission
3
Optical
Fibre
Transmission
System
Optical
Fibre
Transmission
System
electrical
signal electrical
signal
optical
signal
Advantages of optical transmission:
1. Longer distance (noise resistance and less attenuation)
2. Higher data rate (more bandwidth)
3. Lower cost/bit
4
FTTx
• Fiber-to-the-node (FTTN)
• Fiber-to-the-curb (FTTC)
• Fiber-to-the-building (FTTB)
• Fiber-to-the-home (FTTH)
Infotransport ja teenused
5
AON vs PON
8
Kiiruste areng
9
10
Special OH octets:
A1, A2 Frame Synch
B1 Parity on Previous Frame
(BER monitoring)
J0 Section trace
(Connection Alive?)
H1, H2, H3 Pointer Action
K1, K2 Automatic Protection
Switching
810 Octets per frame @ 8000 frames/sec
9 rows
90 columns
1
2 Order of
transmission
A1 A2 J0 J1
B1 E1 F1 B3
D1 D2 D3 C2
H1 H2 H3 G1
B2 K1 K2 F2
D4 D5 D6 H4
D7 D8 D9 Z3
D10 D11 D12 Z4
S1 M0/1 E2 N1
3 Columns of
Transport OH
Section Overhead
Line Overhead
Synchronous Payload Envelope (SPE)
1 column of Path OH + 8 data columns
Path Overhead
Data
STS-1 Frame 810x64kbps=51.84 Mbps
125 s
11
SONET/SDH rates
Example: An OC48 frame has 48 x 90 columns in 125 s
B E R
B-PON + DSL
T o p o l o g y F i l e E d i t L o c a t e V i e w H e l p
M o u n t 4 3 1 7 4 3 7 1 9 5 0 7 9 % / N e t w o r k
T r a f f i c H e l p
Splittr
DSL modem
DSLAM
POTS Card
E-PON access
OLT
ONU
Metro ring
CPE
DSL broadband access
DSL broadband access DSL broadband access
Infovoogude jaotamine (DL)
14
Infovoogude jaotamine (UL)
15
ESTWIN
• Eesmärk
– Eesti maapiirkondadele kiire lairibaühenduse
tagamine (100Mbit/s)
• Baasvõrk kannab nime FiberCo
• Kaks baasvõrgu stsenaariumi
– Võrk on ühendatud lähima olemasoleva
operaatori saidiga
– Võrk on ühendatud vähemalt kahe olemasoleva
operaatori saidiga
ESTWIN
• 6000 km
• Võrguühenduskohad 1421
• Katab 98% Eesti rahvastikust
• Ühenduspunkt majapidamisest 1.5km
kaugusele
Struktuur
19
Router
Router Router
ONE ONE
ONE
Router
Router
Optical Network
End
Customer
Lingid
http://en.wikipedia.org/wiki/G.709
http://www.jdsu.com/ProductLiterature/otn-
po-lab-tm-ae.pdf
20