Minimizing average latency in oblivious routing

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Minimizing average latency in oblivious routing
We consider the problem of minimizing average latency cost while obliviously routing traffic in a network with linear latency functions. This is roughly equivalent to minimizing the function e(load(e))2 , where for a network link e, load(e) denotes the amount of traffic that has to be forwarded by the link. We show that for the case when all routing requests are directed to a single target, there is a routing scheme with competitive ratio O(log n), where n denotes the number of nodes in the network. As a lower bound we show that no oblivious scheme can obtain a competitive ratio of better than ( log n). This latter result gives a qualitative difference in the performance that can be achieved by oblivious algorithms and by adaptive online algorithms, respectively, since there exist a constant competitive online routing algorithm for the cost-measure of average latency [2]. Such a qualitative difference (in general undirected networks) between the performance of online algorithms and o...
Prahladh Harsha, Thomas P. Hayes, Hariharan Naraya
Added 30 Oct 2010
Updated 30 Oct 2010
Type Conference
Year 2008
Where SODA
Authors Prahladh Harsha, Thomas P. Hayes, Hariharan Narayanan, Harald Räcke, Jaikumar Radhakrishnan
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