INTRODUCTION
Wireless Sensor Network using many wireless
communication protocols, such as Bluetooth [1], ZigBee,
UWB (ultra wideband), and wifi[2]. Each protocol has its own
characteristics. UWB is designed for low-power, short-range
and high speed data rate. Operational range for UWB can
reach 10 meters based on the IEEE 802.15.3 standard[3]. Wifi
is based on the IEEE 802.11 specification. The data rate can
reach 11 Mbps with distances up to 100 meters, but it needs a
great power[4]. ZigBee is a technology with low data rate, low
cost, and use small power. ZigBee is IEEE 802.15.4 standard.
ZigBee data rates can reach 250kbps and the distance range is
10m - 70m.[5]
Wifi has the advantages of high data rate and long range
transmit distances, but it requires a great power that is equal to
400mA on standby operation. While ZigBee has the
advantages that it uses less power that is equal to 30mA during
standby mode, but zigbee only supports low data rate and
short range transmit distances. With respective advantages and
disadvantages are owned by these both standard
communication, the researchers tried to combine the ZigBee
communication standard with wifi communication standards