Construction of strongly connected dominating sets in asymmetric multihop wireless networks
Construction of strongly connected dominating sets in asymmetric multihop wireless networks
复制标题
非对称多跳无线网络强连通支配集的构建
DOI:
10.1016/j.tcs.2008.09.058
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发表时间:
2009-03
影响因子:
1.1
通讯作者:
Wu, Weili
中科院分区:
文献类型:
--
作者:
Li, Deying;Zhang, Zhao;Wan, Peng-Jun;Gao, Xiaofeng;Du, Hongwei;Wu, Weili
Consider an asymmetric wireless network represented by a digraph G=(V,E). A subset of vertices U is called a strongly connected dominating set (SCDS) if the subgraph induced by U is strongly connected and every vertex not in U has both an in-neighbor in U and an out-neighbor in U. SCDS plays an important role of the virtual backbone in asymmetric wireless networks. Motivated by the construction of a small virtual backbone, we study the problem Minimum SCDS, which seeks a smallest SCDS of a digraph. For any constant 0<ρ<1, there is no polynomial-time ρlnn-approximation for Minimum SCDS unless NP⊆DTIME(no(lnn)), where n is the number of nodes. However, none of the polynomial-time heuristics for Minimum SCDS proposed in the literature are logarithmic approximations. In this paper, we present a polynomial-time (3H(n−1)−1)-approximation algorithm for Minimum SCDS, where H is the harmonic function. The approximation ratio of this algorithm is thus within a factor of 3 from the best possible approximation ratio achievable by any polynomial-time algorithm.
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DOI:
10.1109/icpp.2001.952059
发表时间:
2001-09
期刊:
International Conference on Parallel Processing, 2001.
影响因子:
--
作者:
A. Salhieh;J. Weinmann;Manish Kochhal;L. Schwiebert
通讯作者:
A. Salhieh;J. Weinmann;Manish Kochhal;L. Schwiebert
DOI:
10.1007/b102533
发表时间:
2013
期刊:
Springer US
影响因子:
--
作者:
通讯作者:
--
DOI:
10.1007/978-1-4613-0303-9
发表时间:
1998-10
期刊:
--
影响因子:
--
作者:
D. Du;P. Pardalos
通讯作者:
D. Du;P. Pardalos
影响因子:
3.8
作者:
P. Wan;K. Alzoubi;O. Frieder
通讯作者:
P. Wan;K. Alzoubi;O. Frieder
DOI:
10.1007/11610113_2
发表时间:
2006-01
期刊:
--
影响因子:
--
作者:
D. Du;M. Thai;Yingshu Li;Dan Liu;Shiwei Zhu
通讯作者:
D. Du;M. Thai;Yingshu Li;Dan Liu;Shiwei Zhu