Transcript
Automated Fiber Switching for PON Dynamic Fiber Connectivity Improves Network Protection
Dynamic fiber connectivity enables a more efficient optical protection network architecture. It reduces the amount of protection circuits while it increases the availability. The result is significant CAPEX savings and improved SLA success rate. Passive Optical Network (PON) Architectures PON architectures consists of the following equipment: • An Optical Line Termination (OLT) located in a Central Office (CO) and controls the bidirectional flow of information across the network • An Optical Network Termination (ONT) located directly at the customer premises – The ONT provides an optical connection to the local customer equipment • An Optical Distribution Network (ODN) that consists of optical cables and passive splitters
Class 5 Switch Central Office (CO) or Point of Prescence (PoP)
POTS/VoIP
single PC or LAN (Internet connection)
STB
Splitter
to other houses
ATM / Ethernet Switch
OLTs ONT
GR-303 Gateway
Video Headend
Router
to other splitters
Internet
Optical Distribution Network (ODN)
A PON usually provides an unprotected economical fiber drop to homes for residential services. On the other hand, businesses require redundancy for high reliability, and they are willing to pay a premium for their service. However, there is a trade-off between the OLT cost of protection and the level of service Passive reliability. Port 1
PON Costly Protection SchemesPort 1 GPON System
Port 2
Redundant (diversely routed fibers) in the F1 path
Splitter
Port 2
BONT
50% Cap
SFONT Port 1
There are five basic elements that can be protected withinRedundant the PON infrastructure: F2 Paths for Business ONTs Redundant OLT • The OLT PON Port Non-Redundant F2 Paths Equipment (only one OLT for Residential ONTs port transmits at a CO time) to the splitter) • The F1 Facility (from the • The Passive Optical Splitter • The F2 Facility (from the splitter to the customer premises) • The ONT PON Port
Port 2
BONT
SFONT
Protectio
The global standard for PON protection schemes are referred to as Types A, B, C, and D. The vast majority of OLT equipment redundancy consists of industry standard Type B protection. Type B protection duplicates the shared part of the PON, that is, the Fiber Feeder and optical interface ports at the OLT. In the following diagram (which is the Type B method), both the OLT ports and the F1 facilities are protected. The splitter is a 2xn splitter, meaning that it has two ports on the network side and n ports on the access side. Each of the OLT ports is redundant, but only one of them can transmit at a time. Innovate • Design • Engineer • Manufacture | Silicon Valley • Shenzhen • Tel Aviv • Ireland
[email protected] | wave-2-wave.com | © Wave2Wave Solution Corporation. All rights reserved. v. 072417
to other houses
STB
AT
single PC or LAN (Internet connection)
Router
to other splitters
Internet Automated Fiber Switching for PON Optical Distribution Network (ODN) Fiber Connectivity Improves Network Protection Dynamic
GPON System
Port 1
Passive Splitter
Redundant (diversely routed fibers) in the F1 path
Port 2
BONT
Port 1
SFONT
Port 2
Port 1 Port 2
Redundant F2 Paths for Business ONTs
Redundant OLT Equipment (only one OLT port transmits at a time)
BONT
Non-Redundant F2 Paths for Residential ONTs
SFONT
Actual equipment deployments of Type B protection yield the following OLT equipment configurations: Service Port
Class 5 Switch
Inter-Shelf Communications
Video Headend Class 5 Switch
Service Port
Service Port
) or Point PoP)
Switch
Protect Port
Protect Port
Inter-Shelf
Communications Vendor OLT Protection Designs
Internet GR-303 Gateway
Making Video Automated Optical Switches Part of The PON Ecosystem Protect Port
Protect Port
Headend
Service Port
Both above implementation options waste 50% of the in-service deployed OLT equipment, and increase OPEX expenses Vendor OLT Protection Designs Internet of provisioning and protection. Since economical tradeoffs are critical in large scale Telco networks, improving reliability performance by duplication of OLTs and ports as typically done is considered extremely expensive.
Router
2 x Equipment Costs + OPEX of Additional Shelf
50% Capacity Loss
The only PON ecosystem component that can alleviate this duplication expense is an Automated Optical Switch as Service Port shown below:
Port 1 Port 2
BONT
2 x Equipment Costs + OPEX of Additional Shelf
50% Capacity Loss
Inter-Shelf Communications
1:1 Service Port
SFONT
Protect Port
Port 1
BONT
SFONT
Protect Port
Inter-Shelf Communications
Port 2
Service Port
1:1
1:1
Protect Port
Protect Port Service Port
1:1
Protection Control Communications Link
Protection Control Communications Link
Service x Service z
Service Facility x
*
Service x Service z
* *
*
Service Facility xFacility x Protection Protection Facility x
Automated Fiber Switcher Automated Fiber Switcher
1:N Protection of both Equipment & Facilities 1:N Protection of both Equipment & Facilities
Innovate • Design • Engineer • Manufacture | Silicon Valley • Shenzhen • Tel Aviv • Ireland
[email protected] | wave-2-wave.com | © Wave2Wave Solution Corporation. All rights reserved.
Automated Fiber Switching for PON Dynamic Fiber Connectivity Improves Network Protection
With automated fiber switching, service providers can minimize network outages and restore service more quickly when they occur. In addition, this architecture reduces OPEX via a reduction in truck rolls and technician labor by automating fiber management. Physical fiber connections can be performed remotely by network operations staff. This approach also enables Telcos to remotely configure connections without risky manual patching, and without exposing high usage connections to human error. Remote access to the physical layer network characterization testing, troubleshooting, and fault work-arounds can be centralized at the Network Operations Center (NOC). The many benefits of automated fiber switching as an integral PON ecosystem component include: • • • • • • • • • •
Faster time to revenue Reduced provisioning times Increased customer satisfaction Fewer truck rolls, leading to direct labor savings Remote testing and troubleshooting Sharing of centrally located test equipment Minimized downtime and fewer outages Efficient use of capex and central office space Cost-effective open network access Accurate record keeping
The only effective way to manage PON costs is to minimize equipment and labor requirements. Specifically, it is imperative to minimize the need for duplicate OLT equipment and technicians being deployed into the field to manually provision, test, maintain and troubleshoot PONs. Since optical access networks typically have a 20-year depreciation life, automated fiber switches should be a key ecosystem component in the Telco arsenal to address PON economics and ongoing operations concerns.
Innovate • Design • Engineer • Manufacture | Silicon Valley • Shenzhen • Tel Aviv • Ireland
[email protected] | wave-2-wave.com | © Wave2Wave Solution Corporation. All rights reserved.
