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Performance evaluation of prioritized handoff schemes in mobile cellular networks

机译:移动蜂窝网络中优先切换方案的性能评估

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摘要

This paper deals with the performance analysis of two prioritized handoff schemes for mobile cellular networks in which handoff attempts finding all channels busy are queued for a maximum time. Fixed channel assignment is assumed. In the first prioritized handoff scheme considered, handoff attempts are queued according to the first-in-first-out (FIFO) policy. Conversely, the second scheme resorts to an ideal nonpreemptive priority queueing policy to enhance system performance. Differently from previous works, in this paper the performance analysis is carried out on the basis of a model which takes into account the event that a call may terminate when the mobile user is waiting for a handoff. Comparisons with simulation results and analytical predictions derived by means of alternative approaches highlight a better estimation accuracy for the proposed method. Moreover, it is also demonstrated here that the FIFO policy allows performance very close to that of the ideal prioritized handoff scheme and, hence, that it is a solution suitable for applications in mobile cellular networks where a high service quality is required.
机译:本文对移动蜂窝网络的两种优先切换方案的性能分析进行了研究,在这些方案中,发现所有信道都处于繁忙状态的切换尝试被排队了最长的时间。假定固定的信道分配。在考虑的第一个优先级切换方案中,切换尝试根据先进先出(FIFO)策略排队。相反,第二种方案采用理想的非抢先优先级排队策略来增强系统性能。与以前的工作不同,本文基于模型进行性能分析,该模型考虑了在移动用户等待切换时呼叫可能终止的事件。与仿真结果和通过替代方法得出的分析预测结果的比较表明,该方法具有更好的估计精度。此外,这里还证明了FIFO策略允许的性能非常接近理想的优先切换方案,因此,它是适用于要求高服务质量的移动蜂窝网络中应用的解决方案。

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