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Video streaming represents a large fraction of Internet traffic. Surprisingly, little is known about the network characteristics of this traffic. In this paper, we study the network characteristics of the two most popular video streaming services, Netflix and YouTube. We show that the streaming strategies vary with the type of the application (Web browser(More)
With the popularity of mobile devices and the pervasive use of cellular technology, there is widespread interest in hybrid networks and on how to achieve robustness and good performance from them. As most smart phones and mobile devices are equipped with dual interfaces (WiFi and 3G/4G), a promising approach is through the use of multi-path TCP, which(More)
Recent research on Internet traffic classification has yield a number of data mining techniques for distinguishing types of traffic, but no systematic analysis on "Why" some algorithms achieve high accuracies. In pursuit of empirically grounded answers to the "Why" question, which is critical in understanding and establishing a scientific ground for traffic(More)
—One of the key challenges in designing a rate adaptation scheme for IEEE 802.11 wireless LANs (WLANs) is to differentiate bit errors from link-layer collisions. Many recent rate adaptation schemes adopt the RTS/CTS mechanism to prevent collision losses from triggering unnecessary rate decrease. However, the RTS/CTS handshake incurs significant overhead and(More)
Multi-Path TCP (MPTCP) is a new transport protocol that enables systems to exploit available paths through multiple network interfaces. MPTCP is particularly useful for mobile devices, which usually have multiple wireless interfaces. However, these devices have limited power capacity and thus judicious use of these interfaces is required. In this work, we(More)
In order to prevent a wireless node from corrupting other on-going transmissions, IEEE 802.11 medium access control (MAC) allows the node to access the channel only if the medium is determined to be idle. However, this rule sometimes can lead to extremely low transmission opportunities (i.e. starvation) of nodes owing to unfair carrier sensing induced by(More)
Multipath TCP is a new transport protocol that enables systems to exploit available paths through multiple network interfaces. MPTCP is particularly useful for mobile devices, which frequently have multiple wireless interfaces. However, these devices have limited power capacity and thus judicious use of these interfaces is required. In this work, we develop(More)
A well known way to find the most central nodes in a network consists of coupling random walk sampling (or one of its variants) with a method to identify the most central nodes in the subgraph induced by the samples. Although it is commonly assumed that degree information is collected during the sampling step, in previous works this information has not been(More)
—Advances in cellular technology have increased the demand of accessing the Internet dramatically. Cellular technology not only enables mobility, but also allows redundant connectivity using multiple wireless paths to improve availability, reliability, and performance. Multiple paths enable the potential to shift traffic from broken or congested paths to(More)
Recently, wireless sensor network (WSN) technology has been widely used in various fields such as public safety applications since it provides a wide range of surveillance and monitoring applications with an inexpensive price. In this paper, we investigate the use of wireless sensor network technology for fire detection and rescue system. We propose a(More)