Semi-oblivious routing

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Semi-oblivious routing
We initiate the study of semi-oblivious routing, a relaxation of oblivious routing which is first introduced by R¨acke and led to many subsequent improvements and applications. In semi-oblivious routing like oblivious routing, the algorithm should select only a polynomial number of paths between the source and the sink of each commodity, but unlike oblivious routing, the flow from each source to its sink is not just a scalar multiple of the single-commodity flow; any amount of flow can be sent along each selected path. Semi-oblivious routing has several applications in traffic engineering and VLSI routing. Trivially, any competitive ratio ρ for oblivious routing (includling the polylogarthimic ratio in undirected graphs obtained by R¨acke) also implies competitive ratio ρ for semioblivious routing. In this paper, we focus on lower bounds. We rule out the possibility of O(1) competitive ratio for semi-oblivious routing in undirected graphs by providing a lower bound of Ω( lo...
Mohammad Taghi Hajiaghayi, Robert D. Kleinberg, To
Added 14 Jun 2010
Updated 14 Jun 2010
Type Conference
Year 2006
Where SPAA
Authors Mohammad Taghi Hajiaghayi, Robert D. Kleinberg, Tom Leighton
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