Szukana fraza: [Abstract = "The connected dominating set \(CDS\) has become a well\-known approach for constructing a virtual backbone in wireless sensor networks. Then traffic can forwarded by the virtual backbone and other nodes turn off their radios to save energy. Furthermore, a smaller CDS incurs fewer interference problems. However, constructing a minimum CDS is an NP\-hard problem, and thus most researchers concentrate on how to derive approximate algorithms."]

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