Abstract
The Measurement Lab (MLab) provides a large and open collection of Internet performance measurements. We make use of it to look at the state of the German Internet by a structured analysis, in which we carve out expressive results from the dataset to identify busy hours and days, the impact of server locations and congestion control protocols, and compare Internet service providers. Moreover, we examine the impact of the COVID-19 lockdown in Germany. We observe that only parts of the Internet show a performance degradation at the beginning of the lockdown and that a large impact in performance depends on the network the servers are located in. Furthermore, the evolution of congestion control algorithms is reflected by performance improvements. For our analysis, we focus on the busy hours. From the end-user perspective, this time is of most interest to identify if the network can support challenging services such as video streaming or cloud gaming at these intervals.
Highlights
The demand for high-throughput and low-latency Internet access is increasing by the requirements of recent and upcoming applications
This confinement includes the selections of Internet service providers (ISPs), busy hours and days, congestion control protocols, and the impact of the measurement server locations and sites
The previous results show that the performance in terms of throughput and round trip times (RTTs) are impacted by the time of day and the congestion control protocol, whereas we show that the difference in congestion protocols after the TCP BBR becomes the predominant protocols stems from clients with a different behavior
Summary
The demand for high-throughput and low-latency Internet access is increasing by the requirements of recent and upcoming applications. Interactive voice applications require a mouth-to-ear latency below 200 ms, see [1], video streaming demands high bandwidth, e.g., Netflix recommends 5 Mbps for high-definition (HD) videos and 25 Mbps for ultra-highdefinition (UHD) videos. These numbers are surpassed by cloud gaming that requires low latency as well as high throughput, in [2] 44 Mbps are reported for an UHD video stream and a negative impact on the user experience is measurable for a latency of about 25 ms [3]. The newer directive [6] demands for 30 Mbps, and the national
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