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The demand for wireless broadband services is growing rapidly. Mobile WiMAX is one of the most promising technologies for broadband wireless communication. It allows users to roam over the network under vehicular speeds. However since IEEE 802.16e standard for Mobile WiMAX defines only hard handover mandatory, Mobile WiMAX cannot transmit or receive packets during handover. Thus real-time packets can be dropped and it may result that service providers cannot guarantee quality of service during handover procedure. The long interruption of hard handover is horrible for real-time applications like IPTV, VoIP and Sat TV. The authors' proposed solution solves this latency problem during handover.
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