Development of an Algorithm for Fiber-to-the-Home Passive Optical Network Automatic Self-restoration Scheme Using Access Control System | Science Publications

Journal of Computer Science

Mohammad S. Ab-Rahman¹  Siti R.A. Mahir¹ 

关键词: Access Control System (ACS);    Customer Access Protection Unit (CAPU);    Multi Access Detection System (MADS);    Optical Line Terminal (OLT);    Media Access Control (MAC);    Smart Access Network-Testing Analyzing and Database (SANTAD);   

DOI  :  10.3844/jcssp.2011.1846.1853

学科分类：计算机科学（综合）

来源: Science Publications

【 摘 要 】

Problem statement: Cables that are installed outdoors are subjected to harsh environmentalconditions which make break down inevitable. When this happen it will disrupt the services and causetrouble 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) toprovide FTTH-PON monitoring, fault detection and protection. Approach: To design the C programsfor ACS and CAPU, we will come up with the algorithms which describe the switching configurationin 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 Cprograms will then be tested through simulation. After successful simulations, the programs will bedownloaded 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 ACSand all CAPUs of the current line conditions. As programmed, ACS and CAPU will configure theirswitches to restore the network. When one of the working lines fail, the optical signal will be routed toits dedicated protection line. But when both its working and protection line fail, the optical signal willbe routed to its neighboring protection line. Conclusion: We have successfully simulated therestoration of the optical signal when fault occur at its working line by restoring it to its dedicatedprotection line

【 授权许可】

Unknown