On optimal relay placement and sleep control to improve en- ergyefficiencyincellularnetworksJan 1, 2011·Sheng Zhou,A. GoldsmithZhisheng Niu· 0 min read CiteLast updated on Jan 1, 2011AuthorsSheng ZhouAssociate ProfessorAuthorsZhisheng NiuProfessor← Multi-hoprelaynetworkforbasestationenergysavinganditsperfor- manceevaluation Jan 1, 2011Queuing on energy-efficient wireless transmissions with adaptive modulationandcoding Jan 1, 2011 →