1Department of Electronic Engineering;
City University of Hong Kong;
Hong Kong;
China;
Department of Electronic Engineering;
City University of Hong Kong;
Hong Kong;
China;
Department of SEEM;
City University of Hong Kong;
Hong Kong;
China.;
School of Engineering & Mathematical Science;
City University London;
London;
UK;
Advance; Metering; Infrastructure; Building; Area; Network; WiFi; ZigBee; Delay;