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Performance evaluation of packet mobile communications through level crossing analysis

机译:通过等级交叉分析评估分组移动通信的性能

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摘要

In this paper the performance of a packet mobile radio network is studied in the presence of shadow fading outage intervals. Under quite general assumptions for the medium access protocol, the probability mass function of the sequence of packets that may be lost due to an outage interval is derived. It is seen that long sequences of lost packets are likely to occur for typical values of the mobile speed and shadowing correlation parameters. For delay constrained sources, e.g., voice, the analysis is mainly focused at deriving the probability function of the sequence of dropped packets and the probability of dropping. For data sources, the delay statistic is also derived. In the latter case, the effect of finite buffer length is addressed. Simulation is used to verify the accuracy of approximations introduced in the analysis.
机译:在本文中,在存在影子衰落中断间隔的情况下研究了分组移动无线网络的性能。在针对媒体访问协议的相当普遍的假设下,得出可能因中断间隔而丢失的数据包序列的概率质量函数。可以看出,对于移动速度和阴影相关参数的典型值,很可能会出现丢失分组的长序列。对于延迟受限的源,例如语音,分析主要集中在推导丢弃分组序列的概率函数和丢弃概率。对于数据源,还会导出延迟统计信息。在后一种情况下,解决了有限缓冲区长度的影响。仿真用于验证分析中引入的近似值的准确性。

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