Crowdsourcing Measurements of Mobile Network Performance and Mobility During a Large Scale Event

SGF

“…In [4], we used the presented dataset to analyze network load characteristics at a large-scale event. We analyzed the movement patterns of the users, showing constant movement even during the crowded times.…”

“…As another example, Xu et al [7] used crowdsourcing to investigate a cellular network in Singapore in daily life situations. In this paper, we focus on the dataset of a large-scale event, as partly analysed in [4].…”

A Framework for Publish/Subscribe Protocol Transitions in Mobile Crowds

“…Goal of the evaluation is to verify the concept of transitions in pub/sub systems for crowd communication as a viable solution to react to environmental changes in a flexible and generic way. Therefore, we model a scaled-down scenario based on real-world crowdsourced measurements of people movement during a music festival [8], as illustrated in Figure 4. The scenario can roughly be categorized into two phases with respect to movement characteristics: a relatively static phase during concerts (c.f.…”

“…Based on a simulative evaluation of a prototype of our proposed framework we quantify the performance benefits as well as the additional overhead introduced by executing transitions between two basic pub/sub protocols. The simulation setup is derived from real-world measurements of people's behavior during a large-scale music festival [8], thereby providing valuable insights into protocol performance in a realistic setting. Our findings reveal that transitions executed by our framework enable the system to adapt to changing conditions, while at the same time keeping the control overhead reasonably low.…”

“…Illustration of the evaluation scenario, derived from crowdsourced movement profiles of visitors of a music festival[8].…”