The performance of interactive cloud services depends heavily on which data centers handle client requests, and which wide-area paths carry traffic. While making these decisions, cloud service providers also need to w...
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Almost all geographic routing protocols have been designed for 2D. We present a novel geographic routing protocol, named MDT, for 2D, 3D, and higher dimensions with these properties: (i) guaranteed delivery for any co...
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Diffusion models and mean-field models have been used to approximate many stochastic dynamical systems. A functional strong law of large numbers or a functional central limit theorem justifies such an approximation. S...
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ISBN:
(纸本)9781450358460
Diffusion models and mean-field models have been used to approximate many stochastic dynamical systems. A functional strong law of large numbers or a functional central limit theorem justifies such an approximation. Such a result, however, does not justify the convergence of the equilibria of pre-limit systems to the equilibrium of a limit system. In this talk, I will touch on three recently developed methods for justifying equilibrium convergence in the setting of bandwidth sharing networks and multiclass queueing networks, with a focus on moment generating function method and the state-space-collapse. Based on joint works with Anton Braverman, Chang Cao, Masakiyo Miyazawa, and Xiangyu Zhang..
In Solid-State Drives (SSDs) with tens of ash chips and highly parallel architecture, we can speed up I/O operations by well-utilizing resources during page allocation. Proposals already exist for using static page al...
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ISBN:
(纸本)9781450327893
In Solid-State Drives (SSDs) with tens of ash chips and highly parallel architecture, we can speed up I/O operations by well-utilizing resources during page allocation. Proposals already exist for using static page allocation which does not balance the IO load and its efficiency depends on access address patterns. To our best knowledge, there have been no research thus far to show what happens if one or more internal resources can be freely allocated regardless of the request address. This paper explores the possibility of using different degrees of dynamism in page allocation and identifies key design opportunities that they present to improve SSD's characteristics.
An important issue in multiprogrammed multiprocessor systems is the scheduling of parallel jobs. Most research in the area has focussed solely on the allocation of processors to jobs. However, since memory is also a c...
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Existing approaches to improve TCP performance over mobile ad-hoc networks have focused only on a subset of the factors affecting TCP performance. A comprehensive set of factors is identified, and a framework called A...
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Existing approaches to improve TCP performance over mobile ad-hoc networks have focused only on a subset of the factors affecting TCP performance. A comprehensive set of factors is identified, and a framework called Atra is proposed to improve TCP performance. Atra improves on the throughput performance of a default protocol stack by 50-100%.
Graph sampling via crawling has been actively considered as a generic and important tool for collecting uniform node samples so as to consistently estimate and uncover various characteristics of complex networks. The ...
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Traditional TCP/IP fingerprinting tools (e.g., nmap) are poorly suited for Internet-wide use due to the large amount of traffic and intrusive nature of the probes. This can be overcome by approaches that rely on a sin...
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ISBN:
(纸本)9781450327893
Traditional TCP/IP fingerprinting tools (e.g., nmap) are poorly suited for Internet-wide use due to the large amount of traffic and intrusive nature of the probes. This can be overcome by approaches that rely on a single SYN packet to elicit a vector of features from the remote server;however, these methods face difficult classification problems due to the high volatility of the features and severely limited amounts of information contained therein. Since these techniques have not been studied before, we first pioneer stochastic theory of single-packet OS fingerprinting, build a database of 116 OSes, design a classifier based on our models, evaluate its accuracy in simulations, and then perform OS classification of 37.8M hosts from an Internet-wide scan. Copyright 2014 acm.
The notion of global time is of great importance for many sensor network applications. To achieve microsecond accuracy, MAClevel timestamping is required for recording packet transmission and reception times. The MAC-...
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ISBN:
(纸本)9781450327893
The notion of global time is of great importance for many sensor network applications. To achieve microsecond accuracy, MAClevel timestamping is required for recording packet transmission and reception times. The MAC-level timestamps, however, are known to be error-prone, especially with low power listening techniques. In this paper, we propose ART, an accurate and robust time reconstruction approach to detecting invalid timestamps and recovering the needed information. We evaluate our approach in both testbed and a real-world deployment. Results show ART is accurate and robust for deployed sensor networks.
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