Design and Implementation of HoWiES for Power Gaining and Power Reduction

Continuous active state of WiFi radio to perform real communications is the major reason for entire system power consumption of mobile devices. Many attempts have been made by both industry and academia to integrate ZigBee radios with smartphones for smart home applications and energy savings. A technique is proposed that applies low power ZigBee radio that delegates the operations performed by WiFi. The ZigBee radio is responsible for discovering the presence of WiFi networks and detecting if the AP intends for the device to communicate meanwhile WiFi radio will be turned off when there is no packet to transmit and receive. An effective lightweight encoding and decoding scheme is applied for one way WiFi communication from AP to zigbee. A technique is contributed to reduce the overhead variable message length WiFi-ZigBee packets are used depending on the frequency of type of packets. Through the network simulation in NS2, it is observed that the proposed technique along with enhanced technique reduces the power consumption and overhead in mobile devices with increase energy gain.