International Journal of Engineering Sciences & Research Technology (IJESRT)
WiMAX (Worldwide interoperability Microwave Access) is a wireless system based on the IEEE 802.16e standard. This standard, published in September 2005, is innovating previous version IEEE 802.16- 2004, which was published in October 2004. In the 802.16-2004 is not implemented support of handovers between cells. This version allows only fixed and nomadic access. The handover mechanism is implemented in the newest version 802.16e. There is introduced support of soft and hard handovers. Rest of the paper is organized subsequently.