Trends in Ring Systems for Submarine cable Systems

摘要

In the domain of optical submarine cablesystems for international networks, the construction oflarge-capacity systems has been continuously undertaken asa backbone for the information society of the 21sf century.This has taken place due to the rapid growth in demand forthe Internet over the past several years, coupled with theadvancement of technologies for large-capacity, high-speedtransmission which have made it possible to realize thisdemand. Abundant information exchange increases businessopportunities and changes the forms of conducting business.This demand pushes technology advancement, which alsocreates new demand causing a mutual accelerating effect, sothat capacity expansion is progressing with increasing speed.This progress is advancing much faster than the prospectsfor our technical progress.This paper presents recent trends in technologies forrealizing large-capacity optical transmission as the basis ofoptical submarine cable systems having a total networkcapacity of several hundred Gbps, as well as networkprotection technology of high reliability and high efficiencywhich deals with network failure, and network failure, andnetwork supervising technology.