Abstract
We experimentally investigate recovery from multiple link failures in a multicore fiber (MCF) link-based optical network (NW). The NW is composed of an input/output interface and a two-ring structure to achieve high-capacity and highly reliable NWs in access areas. Each node has a switch (SW) unit consisting of field-programmable gate array (FPGA)-based optical SW units. The SW unit is able to detect failures and implements a failure recovery scheme that monitors signals and secures a restoration path, even when there are multiple link failures. Signal transmission experiments demonstrated that the path could be recovered within a short time period (approximately 8 ms), even after multiple failures in the NW. Moreover, performing a second (consecutive) switching after no signal was detected in the first switching for complicated multiple failures in the NW also led to recovery within a short time period (approximately 25 ms). These times are sufficiently less than that required by recovery time standard for telecommunication NWs of the Telecommunication Standardization Sector of the International Telecommunication Union (ITU-T). The results indicate that the MCF link would be useful for increasing the reliability of NWs.
Highlights
The transmission capacity of optical fiber networks (NWs) has been increasing to accommodate the rapid growth in data traffic of broadband access services [1]
The switching procedure based on FRS-MS started when data C and F were interrupted in the event of the failures in the working paths of multicore fiber (MCF) 3 and 9 [see Fig. 4(a)]
Recovery from multiple link failures was experimentally investigated in a MCF link-based optical network NWs composed of an I/O interface and a two-ring structure
Summary
The transmission capacity of optical fiber networks (NWs) has been increasing to accommodate the rapid growth in data traffic of broadband access services [1]. The increases have so far been sustained by the mature technologies of wavelength- and time-division multiplexing transmission systems as well as by the advanced technologies of space-, mode-, and polarization-division multiplexing transmission systems. Besides increasing the bit rate per wavelength channel, these technologies will allow sustained increases in the transmission capacity per fiber [2]. When a failure occurs in such extremely high-capacity NWs, the subsequent damage would be more serious than in conventional NWs [3]. The location and number of failures are usually unpredictable, which further hampers service recovery.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
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 call
