International Journal of Advanced Research in Computer Engineering & Technology
Wireless technologies have experienced an enormous growth in the last decades. The Wireless Personal Area Networks (WPANs) and Wireless Local Area Networks (WLANs) are heterogeneous networks which are used in different applications. Two networks, called Wi-Fi (IEEE 802.11 WLAN) and ZigBee (IEEE 802.15.4 WPAN), which operates in 2.4GHz frequency. Spectrum sharing is an effective technique which is used to enhance spectrum utilization. However the coexistence and Interoperability is a critical problem in the case of heterogeneous networks. These critical problems will lead to occurrence of the crowd in the spectrum.