Presentation of the GPON-Extender

1. Making possible
The Information Society
GPON Extender
Adolfo García Yagüe ~ agy@telnet-ri.es
Versión 1.0 ~ Noviembre 2009
© 2009 TELNET-RI

2. Features
1:1
GPON signal Range Extender to up to 60km
–
Version 1:1
–
Version 1:4 (New)
Regenerates 1310nm and 1490nm signals and
amplifies 1550nm lambda
Can work in standalone mode
Supports in-band management via OMCI
Alternative to RSOA technology-based PON
extenders
It is possible to chain several repeaters in cascade
EDFA optical amplifier with low noise factor
EDFA configurations in booster and preamp mode
1:4
© 2009 TELNET-RI

3. Cascade topologies
ONT
Splitter
ONT
>20km Increase
OLT
ONT
Splitting Ratio
ONT
ONT
Increase
Splitter
>20km 0-20km ONT
>20km
OLT Distance
ONT
ONT
ONT
Distance
Splitter
>20km >20km ONT
>20km
OLT +
ONT Splitting Ratio
ONT
© 2009 TELNET-RI

4. Parallel topologies
ONT
ONT
Splitter
ONT
>20km Extend
OLT
Splitter
ONT
ONT Post-Splitter
ONT
0-20km
ONT
ONT
Splitter
ONT
0-20km ONT
Splitter
>20km Parallel
OLT ONT Extenders
ONT
0-20km
Splitter
ONT
ONT
© 2009 TELNET-RI ONT

5. Hybrid topologies
ONT
Splitter
ONT
0-20km ONT
>20km >20km
Splitter
OLT ONT
ONT
0-20km
Splitter
ONT
ONT
ONT
© 2009 TELNET-RI

6. Benefits of GPON-Extender
Technical Business
Increase GPON distance Reduce the number of plants with
Improve signal quality OLT equipment
Extends1550nm CaTV/IPTV Covering more customers with the
signal same infrastructure
Increase Splitting Ratio > 256 Reduce network CAPEX
Parallel and cascade Increasing the number of
configuration possible subscribers per OLT
WDM => Reduction of fiber in Reduce PON deployment costs
Trunk PON Ability to reach second phase
deployments faster
OVERSPLITTING!
© 2009 TELNET-RI

7. OMCI management
ONT chip embedded in GPON Extender
GPON
–
Interoperable
–
No need for complete provisioning
–
OMCI Channel
–
Dedicated entities
–
Does not reduce sensitivity of regeneration
components: Electronic interconnection, not
optical
OMCI management supported
–
According to ITU-T G.984.4 Amd 1
–
Reach Extender entities
–
Entities present according to configuration
of the equipment
© 2009 TELNET-RI

8. GPON Extender 1:4
TDS= 10ns
uP
Latency values
GPON TUS= 3ns
SFP Control (insertion, Txon, PowTX, PowRX)
Aggregator
+
Combiner
Extender Box
(OMCI managed)
4 PON branches, at full power
1 Splitter saving
No splitting losses
 Service from 1 Extender to 256 clients
© 2009 TELNET-RI

9. SFP/SFF Optical components
Two modes of supply
–
SFF Modules (optical parts welded)
–
SFP Modules (removable optical parts)
(Identical optical characteristics of sensitivity)
Advantages of using SFPs
–
Facilitates evolution to1:4 (reuse of SFPs)
–
Modularity, response to component failures
–
Flexibility in change/evolution of lambdas
–
Single-fiber/bi-fiber
–
Modules manufacturer independent
–
B+ or C+ optics
–
DWDM in PON Trunking
© 2009 TELNET-RI

10. DWDM PON Trunking
ONU
Splitter ONU
ONU
OLT
OLT
λ1 ONU
λ1
Mux DWDM Mux DWDM
Splitter ONU
λ2
OLT
OLT ONU
I I
λ2
N
T T
E E N
T T
E E
FR R F FR R F
2A 2A
Z Z 2A 2A
Z Z
ONU
DWDM
λ3
Splitter ONU
(Up to100Km)
λ3
OLT
OLT ONU
ONU
Splitter ONU
ONU
Allows the operator to maximize the use of fibers in the PON network
backbone
Integrated GPON-Extender/DWDM solution with TELNET equipment
© 2009 TELNET-RI

11. GPON Extender Physical Specs
Timing Parameters
Parameter Symbol Min Typ. Max Units Comment
Ratio Hi/Lo Hi/Lo 15 dB Depends on ONT signal quality
Interpacket Space Tg 25 ns Guard time depending on Hi/Lo ratio
Burst stabilization Ts 8 Ns Depends on Hi/lo y Tg
time
GPON Extender Tds 9 ns
Latency
Downstream
GPON extender Tup 2 ns
Latency Upstream
Tx & Rx Parameters
Parameter Value Comments
RX Downstream Sensitivity -28/-8 dBm BER @ ONU = 10E-12
RX Upstream Sensitivity -26/-10 dBm BER @ OLT=10E-10
Downstream Tx Power +2dBm
Uptream Tx Power -6/-3/+1 dBm Configurable on SNMP
Upstream Extinction Ratio > 20dB
EDFA Parameters
Parameter Min Typ. Max Units Comments
Output Power +10 dBm
Nominal Gain 20 dB SNMP Configurable
Input Range -30 -4 dBm
Noise Factor(NF) 5 dB
© 2009 TELNET-RI

12. GPON Extender Family
GPON Extender Management Optical modules WDM EDFA 1550
1:1 SFF OMCI/SNMP/No SFF No No
1:1 SFP OMCI/SNMP/No SFP Yes No
EDFA 1:1 SFF OMCI/SNMP/No SFF No Yes
1:4 SFF OMCI/No SFF No No
1:4 SFP OMCI/No SFP Yes No
Micro SAE
1 GPON Extender
MetroSAE
12 GPON Extender (x4)
TriSAE
3 GPON Extender
© 2009 TELNET-RI

13. Making possible
The Information Society
Thanks for your attention.
www.telnet-ri.es
© 2009 TELNET-RI