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- W2111246463 abstract "The main task in analyzing a switching network design (including circuit-, multirate-, and photonic-switching) is to determine the minimum number of some switching components so that the design is non-blocking in some sense (e.g., strict- or wide-sense). We show that, in many cases, this task can be accomplished with a simple two-step strategy: (1) formulate a linear program whose optimum value is a bound for the minimum number we are seeking, and (2) specify a solution to the dual program, whose objective value by weak duality immediately yields a sufficient condition for the design to be non-blocking. We illustrate this technique through a variety of examples, ranging from circuit to multirate to photonic switching, from unicast to $f$- cast and multicast, and from strict- to wide-sense non-blocking. The switching architectures in the examples are of Clos-type and Banyan- type, which are the two most popular architectural choices for designing non- blocking switching networks. To prove the result in the multirate Clos network case, we formulate a new problem called {sc dynamic weighted edge coloring} which generalizes the {sc dynamic bin packing} problem. We then design an algorithm with competitive ratio $5.6355$ for the problem. The algorithm is analyzed using the linear programming technique. We also show that no algorithm can have competitive ratio better than $4-O(log n/n)$ for this problem. New lower- and upper-bounds for multirate wide-sense non-blocking Clos networks follow, improving upon a couple of $10$-year-old bounds on the same problem." @default.
- W2111246463 created "2016-06-24" @default.
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- W2111246463 date "2010-03-01" @default.
- W2111246463 modified "2023-09-24" @default.
- W2111246463 title "Analyzing Nonblocking Switching Networks using Linear Programming (Duality)" @default.
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- W2111246463 doi "https://doi.org/10.1109/infcom.2010.5462100" @default.
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