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The Next-Generation Signaling System for switching and control in integrated optical networks

The Next-Generation Signaling System (NGSS) is a new concept for integrated connection control of electronics and optical networks. As an extension of the Lucent Softswitch, the NGSS combines signaling and call control features of the existing Lucent Softswitch with those of optical network elements, such as Lucent's optical cross connect (OXC) and optical add-drop multiplexer (OADM). It operates in conjunction with Lucent's Optical Service Manager (OSM) and Optical Network Navigator System (ONNS). Under NGSS control, electrical and optical bearer traffic from customer premises and switching systems are mapped onto high-speed optical channels and routed to the endpoints. A two-level call setup, one at the optical path and the other at the call connection level, is considered. In this paper, the overall architecture and functional composition of the NGSS, examples of electrical and optical equipment control at the optical transport, and issues that need to be addressed in order to move this concept to the product stage are discussed.