WLAN系统带宽测量方法分析
Analysis of bandwidth measurement methodologies over WLAN systems
摘要：
WLAN设备已经成为当今网络部署的基本组件。然而，即使传统的网络应用程序在无线链路上运行时基本不变，但这些应用程序与无线传输动态之间的实际交互尚未完全了解。这种应用的一个重要例子是带宽估计工具。这一领域已经成为一个成熟的研究课题，并取得了丰硕的成果。不幸的是，最近的研究表明，这些结果的WLAN链路的应用程序是不简单的。其主要原因是，开发带宽测量工具所采用的假设在存在无线链路（例如，非FIFO调度）的情况下不再成立。本文建立从这些观察，其主要目标是分析探测数据包和WLAN传输之间的相互作用，在带宽估计过程中。本文提出了一个分析模型，更好地考虑到WLAN链路的特殊性。该模型通过广泛的实验和仿真进行了验证，并揭示了（1）传输探测数据包的延迟分布对于整个探测序列并不相同，这会导致测量过程出现偏差;（2）现有工具和技术指向可实现的吞吐量，而不是可用的吞吐量。带宽或容量，如前所述。
英文摘要：
WLAN devices have become a fundamental component of nowadays network deployments. However, even though traditional networking applications run mostly unchanged over wireless links, the actual interaction between these applications and the dynamics of wireless transmissions is not yet fully understood. An important example of such applications are bandwidth estimation tools. This area has become a mature research topic with well-developed results. Unfortunately recent studies have shown that the application of these results to WLAN links is not straightforward. The main reasons for this is that the assumptions taken to develop bandwidth measurements tools do not hold any longer in the presence of wireless links (e.g. non-FIFO scheduling). This paper builds from these observations and its main goal is to analyze the interaction between probe packets and WLAN transmissions in bandwidth estimation processes. The paper proposes an analytical model that better accounts for the particularities of WLAN links. The model is validated through extensive experimentation and simulation and reveals that (1) the distribution of the delay to transmit probing packets is not the same for the whole probing sequence, this biases the measurements process and (2) existing tools and techniques point at the achievable throughput rather than the available bandwidth or the capacity, as previously assumed.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
