期刊刊名：黎明學報 　 卷期：23卷1期

篇名出版日期：2012年1月31日

作者：Ren-Guey Chu,Hung-Liang Chen,Chiz-Chung Cheng,Hung-Wei Lin,朱仁貴,陳宏良,鄭治中,林浤偉

語言：English

關鍵字：handoff,Markovian Arrival process (MAP),drop probability,切換,馬可夫到達過程,遺失機率

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摘要：
In this chapter, we apply the matrix-analytical approach to explore the performance measures of the drop and block probabilities of wireless cellular networks with guard channel reservation handoff scheme. We apply the Markovian Arrival process (MAP) to model new call and handoff call. We examine the bursty nature of handoff call drops by means of conditional statistics with respect to alternating block and non-block periods. Five related performance measures are derived from conditional statistics, including the long-term new call block and handoff call drop probabilities, and the three short-term measures of average length of a block period and a non-block period, as well as the conditional handoff call drop probability during a block period. These performance measures greatly assist the guard channel reservation handoff mechanism in determining a proper threshold guard channel in the cell. Furthermore, we derive the handoff call drop probability from the short-term performance measures of average length of a block period and a non-block period, as well as the conditional handoff call drop probability during a block period. The results presented in this paper can provide guidelines for designing adaptive algorithms to adjust the threshold in the guard channel reservation handoff scheme.

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