Title :
Photonic transport network architecture and OA&M technologies to create large-scale robust networks
Author_Institution :
NTT Opt. Network Syst. Labs., Yokosuka, Japan
fDate :
9/1/1998 12:00:00 AM
Abstract :
In order to realize a large-scale and robust photonic transport network, a network protection strategy and operation, administration, and management (OA&M) realization scheme in wavelength division multiplexing optical path (WDM OP) transport networks has been developed. This paper discusses the networking (restoration/protection) concepts in each optical layer and proposes the most suitable networking strategy. To develop the OA&M technique, the characteristic information format of each optical layer must be discerned. A network node interface (NNI) structure for the WDM OP transport network is proposed. The proposed NNI is defined as the optical transport module (OTM). An OP signal format is defined as the optical transport unit (OTU). Overhead information and schemes to transmit it are also discussed
Keywords :
maintenance engineering; network interfaces; optical communication equipment; optical fibre networks; photonic switching systems; telecommunication network management; wavelength division multiplexing; NNI structure; OA&M technologies; OP signal format; WDM OP transport network; characteristic information format; large-scale robust networks; network administration; network management; network node interface; network operation; network protection; network restoration; optical layer; optical path; optical transport module; optical transport unit; overhead information; photonic transport network architecture; wavelength division multiplexing; High speed optical techniques; Large-scale systems; Optical fiber networks; Optical network units; Photonics; Protection; Robustness; Synchronous digital hierarchy; WDM networks; Wavelength division multiplexing;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
