“…Sensor network is in full use in smart gird applied fields such as point-of-sales (POS), remote monitoring of machines and facilities and smart meter in automatic measurement of water and electricity consumption, which is expected to expand further to various areas [10,11]. Its service area is expanding to wider areas in connection with mobile communication such as existing 3rd generation partnership project (3GPP), telecoms and internet converged services and protocols for advanced networks (TISPAN), wideband code division multiple access (WCDMA), high speed downlink packet access (HSDPA), global system for mobile communications (GSM), wireless local area network (W-LAN), and low power communication technologies such as wireless internet, Wi-Fi, Zigbee, and Bluetooth [12][13][14].…”