Abstract
Problem statement: Cables that are installed outdoors are subjected to harsh environmental conditions which make break down inevitable. When this happen it will disrupt the services and cause trouble to the users. To overcome this is to provide a means of restoring the network in case of failure. We introduced the Access Control System (ACS) and Customer Access Protection Unit (CAPU) to provide FTTH-PON monitoring, fault detection and protection. Approach: To design the C programs for ACS and CAPU, we will come up with the algorithms which describe the switching configuration in general. The switching configurations are tabulated in truth tables and flow charts are constructed. Based on the flow charts, the respective C programs for ACS and CAPU will be written. The C programs will then be tested through simulation. After successful simulations, the programs will be downloaded into the respective PIC microcontrollers in the ACS and CAPU for lab testing. Results: When several faults occur at various lines, each Multi Access Detection System (MADS) informs ACS and all CAPUs of the current line conditions. As programmed, ACS and CAPU will configure their switches to restore the network. When one of the working lines fail, the optical signal will be routed to its dedicated protection line. But when both its working and protection line fail, the optical signal will be routed to its neighboring protection line. Conclusion: We have successfully simulated the restoration of the optical signal when fault occur at its working line by restoring it to its dedicated protection line.
Highlights
Fiber-To-The-x (FTTx, where ‘x’ can be home, building and the like) has become the ultimate broadband access technology, outclassing copper cables (Digital Subscriber Lines) and coaxial cables (Hutcheson, 2008) (Yuksel et al, 2008)
In regard to FTTH-PON protection, we introduced the Access Control System (ACS)
If both W(n) and P(n) fail simultaneously, both the 1×2 switch and the 2×2 switch will be activated to route the optical signal to the nearest neighboring protection line
Summary
Fiber-To-The-x (FTTx, where ‘x’ can be home, building and the like) has become the ultimate broadband access technology, outclassing copper cables (Digital Subscriber Lines) and coaxial cables (cable modems) (Hutcheson, 2008) (Yuksel et al, 2008). On the other hand, Yeh et al (2008) proposed a duplex fiber system in which the Media Access Control (MAC) of each ONU activates optical switches for routing the optical signal to a backup line in case of failure. In case the working line fails, the traffic signal will be routed to its dedicated protection line by means of the optical switches.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
