Improved Handover Interruption Time in WiMAX, Using GPS

H. Pirkomaji, V. T. Vakily
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引用次数: 6

Abstract

WiMAX (Worldwide Interoperability Microwave Access) has been one of the most important technologies in telecommunication networks during last few years. Mobility is the most challenging research in WiMAX networks that are highlighted in broadband wireless communications. There is more demand for new data services which need high data rate. But the long interruption of handovers is not acceptable for this kind of services. The real time services like: IPTV and VoIP are sensitive to packet loss. This paper is focused on procedures and the interruption time of full handover in mobile WiMAX. All events that affect on handover during movement of a mobile station will be considered. We have presented a new algorithm to improve the handover interruption time and to decrease the amount of signaling transaction during the handover procedure. In this algorithm we have used GPS (Global Position system) to perform handover faster. Our focus in this algorithm is on the distance between MS (Mobile Station) and BS (Base Station). The MS finds its position using GPS and calculates distance to the SBS (Source Base Station) and neighbor BSs. In the next step, MS selects the target BS according to the distance.
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利用GPS改进WiMAX中的切换中断时间
WiMAX(全球互操作性微波接入)是近年来电信网络中最重要的技术之一。在WiMAX网络中,移动性是最具挑战性的研究,WiMAX网络是宽带无线通信的重点。对高数据速率的新数据业务的需求越来越大。但是对于这类服务来说,长时间的切换中断是不可接受的。IPTV、VoIP等实时业务对丢包比较敏感。本文主要研究了移动WiMAX中完全切换的过程和中断时间。在移动电台的移动过程中,所有影响切换的事件都将被考虑在内。提出了一种改进切换中断时间和减少切换过程中信令事务量的新算法。在该算法中,我们使用GPS(全球定位系统)来实现更快的切换。该算法的重点是移动站(MS)和基站(BS)之间的距离。MS通过GPS定位并计算到源基站(SBS)和相邻基站的距离。下一步,MS根据距离选择目标BS。
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