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To deal with the severe challenge from explosively increasing mobile users' multimedia service requests in mobile networks, introducing cloud-based computing platform and content caching into radio access networks (RANs) has become an effective emerging technique. In this paper, we propose a collaborative hierarchical caching framework in cloud RANs (C-RANs), which minimizes the access delay of content...
Network Address Translation has often been described as an aberration in the evolution of the Internet, and one that will be removed with the completion of the transition of IPv6. This is an opinion in support of NATs, arguing that they are an important step in the evolution of the Internet and may well play a lasting role in this environment.
ISPs face difficulties in optimizing interdomain routing due to the single path routing constraint of BGP. A single best path makes it difficult to optimize routing and is unable to satisfy various application requirements of customers. In this paper, we present a new routing architecture for ISP edge network which breaks this constraint and allows the operator to flexibly assign interdomain paths...
This study investigates the effectiveness of financial incentives (hereafter, simply incentives) in increasing viewership and social sharing of advertisements. Incentives can, in principle, help advertisers reach a larger audience, but there are two aspects of their application that have yet to receive much attention: (a) How large of an incentive will be needed to engage users with advertisements...
A random-walk-based (RW-based) information search makes a single query or multiple queries walk around a network to search for the target information. Local navigation rules, based on which a query chooses an adjacent node to move from the current location, are important for increasing the search speed of the RW-based information search. In the present paper, we focus on degree-dependent navigation...
Recent developments in Internet technology have led to an increased importance of Software-Defined Networks (SDN). Due to advantages of this new network model that controls the network centrally, many service providers and vendors expect that traditional networks should be superseded by SDN. However, because of their centralized nature, they are vulnerable in terms of reliability and fault-tolerance...
Wikipedia is one of the most popular information platforms on the Internet. The user access pattern to Wikipedia pages depends on their relevance in the current worldwide social discourse. We use publically available statistics about the top-1000 most popular pages on each day to estimate the efficiency of caches for support of the platform. While the data volumes are moderate, the main goal of Wikipedia...
This paper analyses the mathematical model of the regional multi-energy system and brings in Multifrontal Method and the nested dissection to solve the model. The model consists of linear and nonlinear algebraic equations and differential equations. The latter two kinds of equations can be finally turned into sparse linear equations. By applying Multifrontal Method, the linear matrix can be factorized...
Traffic monitoring and analysis has become necessary to understand the nature of information flowing within an organization. This is particularly important due to the recent trend of increase in the percentage of anomalous traffic in the overall organizational traffic composition. In this work, we attempt to determine the typical characteristics seen in various organizational network traffic. We use...
Simultaneous wireless information and power transfer (SWIPT) formed by the mixture of communication technology and power transmission is one of the research focuses in the field of wireless communication. This paper introduces the architecture of the SWIPT system, analyzes the key technologies, presents a 2.45GHz microwave rectifier circuit at low input power for energy harvesting. Finally, with the...
Voltage sag has become one of the major power quality concerns in recent years. To accurately evaluate the voltage sag, it is necessary to obtain its sag type. In this paper, a more generalized voltage sag classification method with consideration of phase shift is proposed compared to the traditional classification method. This new method can be used in the accurate discrimination of sag types. Moreover,...
The application of Battery-based Energy Storage System (BESS) has many benefits in the power grid such as frequency support, emergency assistance, lowering costs, and flattening the load curve. In this paper, a modified stochastic security-constrained unit commitment (SCUC) model is introduced to simulate the daily operation of power system. By setting both installed position and capacity of BESS...
With the rapid development of smart grid, flexible access of distributed power supply has become one of the important development goals on smart grid construction. A new wind power grid connected topology based on solid state transformer (SST) is proposed in this paper, the topological structure makes wind power system connect with the power grid through the solid state transformer, the use of solid...
Current ancient water distribution system needs additional personnel and should cause wastage of water, as a result of the distribution isn't pre-intimated or pre-planned. This manual distribution of water by gap and shutting valves on roads might cause accidents and is additional time intense. Because it needs additional personnel, it's conjointly not price effective. Conjointly ancient system failed...
IoT (Internet of Things) has attracted a lot of attention recently. IoT devices need to report their data or status to base stations at various frequencies. The IoT communications observed by a base station normally exhibit the following characteristics: (1) massively connected, (2) lightly loaded per packet, and (3) periodical or at least mostly predictable. The current design principals of communication...
A good automated testing tool could reduce as much as possible the manual work done by testers. In order to improve the traditional record-replay approach and reduce the effort that the testers spending on writing test scripts, we propose an approach that generates the Android application test scripts based on accessibility service without connecting to a computer. This approach simulates user input...
With the high usage of internet today, people started sharing much of the information with each other online. In this paper, we propose to monitor user activity for any hazardous behavior like terrorism on Gmail and Twitter. We apply Natural Language Processing (NLP) techniques like POS tagging, Chunking, Stemming, and WordNet Processing to extract the keyword and check to see whether the information...
We analyze the design space for implementing the Constrained Application Protocol (CoAP) within Content-Centric Networks (CCN), identifying several CoAP specific scenarios and seeing how they map to CCNs. We present an evaluation, recommendations for implementations and extensions, and directions for future work. Our key result is that while several protocol features and flows map naturally, some...
Our research group has proposed a VNT control method based on attractor selection. Since the number of attractors composing an attractor set is limited, it is important to decide what kind of attractors should be prepared. The existing method prepares attractors such that their topological characteristics are different from each other. However, since the existing method does not incorporate current...
One of the most profitable and emerging high-tech markets is the one that involves games for PC and consoles; a market that is growing year by year and that is rapidly evolving. Several big game corporations are implementing now the remote video streaming through the domestic network between two devices; a feature that regards not only PCs but also consoles. This paper investigates one of the main...
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