DISPATCH: An Optimally-Competitive Algorithm for Maximum Online Perfect Bipartite Matching with i.i.d. Arrivals
DISPATCH: An Optimally-Competitive Algorithm for Maximum Online Perfect Bipartite Matching with i.i.d. Arrivals
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DISPATCH:一种用于最大在线完美二分匹配的最优竞争算法
DOI:
10.1007/978-3-030-04693-4_10
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Chang Minjun, Hochbaum Dorit
中科院分区:
文献类型:
--
作者:
Chang Minjun, Hochbaum Dorit
This work presents an optimally-competitive algorithm for the problem of maximum weighted online perfect bipartite matching with i.i.d. arrivals. In this problem, we are given a known set of workers, a distribution over job types, and non-negative utility weights for each pair of worker and job types. At each time step, a job is drawn i.i.d. from the distribution over job types. Upon arrival, the job must be irrevocably assigned to a worker and cannot be dropped. The goal is to maximize the expected sum of utilities after all jobs are assigned.We introduceDispatch, a 0.5-competitive, randomized algorithm. We also prove that 0.5-competitive is the best possible.Dispatchfirst selects a “preferred worker” and assigns the job to this worker if it is available. The preferred worker is determined based on an optimal solution to a fractional transportation problem. If the preferred worker is not available,Dispatchrandomly selects a worker from the available workers. We show thatDispatchmaintains a uniform distribution over the workers even when the distribution over the job types is non-uniform.
DOI:
10.4230/lipics.approx-random.2016.18
发表时间:
2016
期刊:
The Annals of Probability
影响因子:
--
作者:
S. Raghvendra
通讯作者:
S. Raghvendra
DOI:
10.1145/3033274.3085137
发表时间:
2017
期刊:
Proceedings of the 2017 ACM Conference on Economics and Computation
影响因子:
--
作者:
J. Correa;Patricio Foncea;R. Hoeksma;Tim Oosterwijk;T. Vredeveld
通讯作者:
T. Vredeveld