In this paper, the authors challenge the applicability of entropy-based approaches for detecting and diagnosis network traffic anomalies and claim that full statistics (i.e., empirical probability distributions) should be applied to improve the change detection capabilities. They support their claim by detecting and diagnosing large-scale traffic anomalies in a real cellular network, caused by specific ...

Legacy congestion controls including TCP and its variants are known to perform poorly over cellular networks due to highly variable capacities over short time scales, self-inflicted packet delays and packet losses unrelated to congestion. To cope with these challenges, the authors present Verus, an end-to-end congestion control protocol that uses delay measurements to react quickly ...

Android app is an important class of today’s Internet applications that generate roughly 40-50% of mobile Web and app traffic. More than 1.4 million Android apps are offered through Google’s open market and tens of thousands of new apps are added every month. However, very little information is known about their application protocol behaviors because ...

Modern smartphones allow for gestural touchscreen and free-form user interaction such as swiping across the touchscreen or shaking the device. However, user acceptance of motion gestures in recommender systems have not been studied much. In this paper, the authors investigated the usage of gestural interaction patterns for mobile recommender systems. They designed a prototype that ...

In LTE systems, the downlink scheduler is an essential component for efficient radio resource utilization; hence, in the context of LTE simulation, the availability of good down-link scheduler models is very important. At the time this work started, the LTE module of the ns-3 simulator only supported two types of scheduler, namely Round Robin and ...

Clouds commonly store Virtual Machine (VM) images on networked storage. This poses a serious potential scalability bottleneck as launching a single fresh VM instance requires, at minimum, several hundred MB of network reads. As this bottleneck occurs most severely during read-intensive launching of new VMs, the authors focus on scalably minimizing time to boot a ...

WiFi-based Wireless LANs (WLANs) are widely used for Internet access. They were designed such that an Access Points (AP) serves few associated clients with symmetric uplink/downlink traffic patterns. Usage of WiFi hotspots in locations such as airports and large conventions frequently experience poor performance in terms of downlink goodput and responsiveness. The authors study the ...

Every night, a large number of idle Smartphones are plugged into a power source for recharging the battery. Given the increasing computing capabilities of Smartphones, these idle phones constitute a sizeable computing infrastructure. Therefore, for an enterprise which supplies its employees with Smartphones, the authors argue that a computing infrastructure that leverages idle Smartphones being ...

Touch input has been extensively studied. The influence of display orientation on users’ performance and satisfaction, however, is not well understood. In an experiment, the authors manipulate the orientation of multi-touch surfaces to study how 16 participants tap and drag. To analyze if and when participants switch hands or interact bimanually, they track the hands ...

The authors present Odin, an SDN framework to introduce programmability in enterprise Wireless Local Area Networks (WLANs). Enterprise WLANs need to support a wide range of services and functionalities. This includes authentication, authorization and accounting, policy, mobility and interference management, and load balancing. WLANs also exhibit unique challenges. In particular, Access Point (AP) association decisions ...