The rapid advance and extensive applications of WDM technology have brought about a constant increase in the size of the crossconnection in optical works as well as the complexity of their structure.In order to reduce the switching and transmission cost in the optical domain of WDM networks
WaveBand Switching(WBS) has been proposed
for which considerable research has been conducted.In this paper
we introduce some basic concepts of WBS and Multi-Granular Optical Cross-connect(MG-OXC) and present a new type of MG-OXC structure.