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arXiv 2411.04474cs.NI
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流量特征对5G/6G蜂窝系统中系统和用户性能的影响

The Impact of Traffic Characteristics on System and User Performance in 5G/6G Cellular Systems

Eduard Sopin, Vyacheslav Begishev, Vladislav Prosvirov, Konstantin Samouylov, Yevgeni Koucheryavy

AI总结:

本研究利用随机几何和排队论建模,揭示流量到达的相关性与变异性显著影响5G/6G毫米波/亚太赫兹系统性能,偏离泊松假设可致利用率下降10-20%、丢失概率倍增,强调流量与传播统计同等重要。

摘要:

传播环境和流量到达过程的统计特征已知会影响5G/6G毫米波(mmWave)和亚太赫兹(sub-THz)系统中的用户性能。虽然前一个主题最近受到了相当大的关注,但关于流量统计的影响却知之甚少。在本研究中,我们刻画了会话到达过程中的相关性和变异性对5G/6G毫米波/亚太赫兹系统性能的影响。为此,我们使用随机几何和排队论的工具来建模基站(BS)处的服务过程以及毫米波/亚太赫兹无线电部分的细节。考虑的指标包括系统资源利用率和会话丢失概率。我们的结果表明,归一化自相关函数(NACF)、变异系数(CoV)和资源请求分布的方差对所考虑的参数有显著影响。在相同的到达率下,高滞后1的NACF和CoV值可能导致系统脱离运行状态,影响丢失概率和资源利用率高达一个数量级。即使与不相关的泊松过程的轻微偏差也会使利用率降低10-20%,并使会话丢失概率增加数倍。无线电和环境特征可能进一步增加资源请求分布的变异性并降低资源利用率。总的来说,使用普遍接受的泊松假设会导致对5G/6G毫米波/亚太赫兹系统实际性能的严重低估。因此,流量到达和传播统计对于准确评估此类系统的性能同等重要。

英文摘要:

The statistical characteristics of the propagation environment and traffic arrival process are known to affect the user performance in 5G/6G millimeter wave (mmWave) and subterahertz (sub-THz) systems. While the former topic has received considerable attention recently, little is known about the impact of traffic statistics. In this study, we characterize the effects of correlation and variability in the session arrival process on the performance of 5G/6G mmWave/sub-THz systems. To this end, we use the tools of stochastic geometry and queuing theory to model the service process at base stations (BS) and specifics of the mmWave/sub-THz radio part. The metrics considered include the system resource utilization and session loss probability. Our results show that the normalized autocorrelation function (NACF), coefficient of variation (CoV), and variance of the resource request distribution have a significant impact on the considered parameters. For the same arrival rate, high values of lag-1 NACF and CoV may lead the system out of the operational regime, affecting the loss probability and resource utilization by up to an order of magnitude. Even a slight deviation from the uncorrelated Poisson process decreases the utilization by 10-20% and increases the session loss probability multiple times. Radio and environmental characteristics may further increase the variability in resource request distribution and decrease resource utilization. In general, the use of the commonly accepted Poisson assumption leads to a severe underestimation of the actual performance of 5G/6G mmWave/sub-THz systems. Therefore, both traffic arrival and propagation statistics are equally important for accurate performance assessment of such systems.

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