Introducing OMS protection in GMPLS-based optical ring networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Interval availability estimation for protected connections in optical networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Analytical model based on green criteria for optical backbone network interconnection
Computer Standards & Interfaces
Fast spanning tree reconnection mechanism for resilient Metro Ethernet networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Differentiated quality-of-protection in survivable WDM mesh networks using p-structures
Computer Communications
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Network survivability is a key concern in today's network, and will become increasingly important in future optical networks as they carry ever more traffic. Networks are also becoming more complex, with the requirement for increased functionality. Currently, there is a lack of understanding in the industry as to the exact relationship between the choice of network architecture and the meeting of a set availability objective. This paper analyses a number of long-haul network architectures from an unavailability point of view. The long-haul networks analyzed include: networks with diversity, networks with restoration capability, and networks with survivability. Derivations are given for each architecture; formulas for 2 and 4-fiber rings, and dual fed routing are new. A hypothetical reference connection (HRX) and its unavailability objectives are used as references. Networks with restoration capability and networks with survivability meet the proposed objective. Self-healing rings (both 2 and 4-fiber bidirectional line switched rings) and dual fed systems offer the highest level of survivability, by eliminating service impacts caused by cable cuts and equipment failures