发明名称 Optical switching architectures for nodes in WDM mesh and ring networks
摘要 Switching architectures for WDM mesh and ring network nodes are presented. In mesh networks, the switching architectures have multiple levels—a network level having wavelength routers for add, drop and pass-through functions, an intermediate level having device units which handle add and drop signals, and a local level having port units for receiving signals dropped from the network and transmitting signals to be added to the network. The intermediate level device units are selected and arranged for performance and cost considerations. The multilevel architecture also permits the design of reconfigurable optical add/drop multiplexers for ring network nodes, the easy expansion of ring networks into mesh networks, and the accommodation of protection mechanisms in ring networks.
申请公布号 US8831423(B2) 申请公布日期 2014.09.09
申请号 US201313870057 申请日期 2013.04.25
申请人 Cisco Technology, Inc. 发明人 Gerstel Ornan;Macchi Mauro;Piciaccia Stefano
分类号 H04J14/00;H04J14/02;H04B10/00;H04Q11/00 主分类号 H04J14/00
代理机构 Edell, Shapiro & Finnan, LLC 代理人 Edell, Shapiro & Finnan, LLC
主权项 1. A switching architecture for a node of a ring fiber optic network having optical fibers carrying wavelength division multiplexed (WDM) signals to and from said node in two directions, said switching architecture comprising: a first network coupler for splitting WDM signals from an optical fiber of said fiber optic network; a first network wavelength router interconnected to at least one optical fiber carrying WDM signals in a direction other than said two directions, said first network wavelength router for receiving said split WDM signals from said first network coupler, and for passing said split WDM signals to said at least one optical fiber carrying WDM signals in a direction other than said two directions; a second network coupler for combining WDM signals to said optical fiber of said fiber optic network; a second network wavelength router interconnected to at least one optical fiber carrying WDM signals from a direction other than said two directions, said second network wavelength router for sending WDM signals from at least one optical fiber carrying WDM signals from a direction other than said two directions to said second network coupler, wherein said fiber optic network can be extended beyond said two directions; and a reconfigurable optical add/drop multiplexer connected to said optical fiber of said fiber optic network between said first network coupler and said second network coupler.
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