Optimal Design of Survivable Photonic Transport Networks of Interconnected WDM Self-Healing Ring Systems(Special Issue on Advanced Internetworking based on Photonic Network Technologies)

概要

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This paper proposes an optimal design sheme for photonic transport networks that interconnect multiple wave-length division multiplexing(WDM)self-healing ring systems by using optical cross connects(OXCs). To calculate the number of OXCs required in each hub to interconnect these ring systems, a virtual mesh network is generated, on which the route of each optical path(OP)going through multiple adjacent rings("ring" is defined as circle in network topology)is determined based on a list of hubs. An integer-programming-based design problem is then formulated that minimizes the overall cost of facilities including OXCs as well as ring systems to accommodate a given demand. By solving this problem, we can simultaneously optimize required number of ring systems in each ring, wavelength assignment within each individual bidirectional ring system, required numnber of OXCs in each hub, and capacity to be allocated to each OP. Numerical examples show that the ring-based network is more cost-effective than the mesh restorable network when the cost of an OADM is lower than that of an OXC, and the OXC-to-fiber cost-coefficient ratio is sufficiently large.
社団法人電子情報通信学会の論文
2000-10-25