Providing Network Survivability to ATM Group Communications Via Self - Healing Survivable Rings
نویسندگان
چکیده
In this paper we examine the potential bene ts of dedicated backup route(s) to provide survivability for ATM group communications. Specifically we examine the feasibility of providing survivability using working multipoint routes with disjoint dedicated backup multipoint routes where the multipoint routes are setup using either Virtual Rings, shared multicast trees, or VC Mesh groups. We introduce a optimization formulation which identi es a \Disjoint Steiner Ring" within a general graph in order to construct Virtual Rings. Numerical results show that disjoint backup shared multicast trees and disjoint backup VC Mesh groups are not always available while self-healing Virtual Rings exist in all cases tested. In addition, experiments comparing the cost of providing survivability between self-healing Virtual Rings, shared trees, and VC Mesh groups show that
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