Synchronous optical network (SONET) and synchronous digital hierarchy (SDH) contiguous concatenation have enabled high-speed networking in both metro and core networks for many narrow-band and broadband services including digital subscriber loop (DSL), cable, and Ethernet. Ironically, the tremendous success and rise of data traffic have, in part, put the focus on some of the inefficiencies and inflexibilities of SDH contiguous concatenation. Here I examine these shortcomings, survey available bandwidth efficiency techniques for data transport, examine two relatively new mechanisms known as virtual concatenation and link capacity adjustment scheme (LCAS) that address these issues, and finally present several potential applications for these technologies.
© Optical Society of America
Original Manuscript: November 5, 2001
Revised Manuscript: November 5, 2001
Published: December 21, 2001
Larry Choy, "Virtual concatenation tutorial: enhancing SONET/SDH networks for data transport," J. Opt. Netw. 1, 18-29 (2002)