School of Information Engineering Guangdong University of Technology Guangzhou 510006 China;
School of Information Engineering Guangdong University of Technology Guangzhou 510006 China;
School of Information Engineering Guangdong University of Technology Guangzhou 510006 China;
School of Information Engineering Guangdong University of Technology Guangzhou 510006 China;
mobile edge computing(MEC); wireless power transfer(WPT); device-to-device(D2D)offloading; cooperative computing; collaborative energy beamforming; optimization;