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This paper presents a consice yet comprehensive description of a DSA-based Vehicle-to-Infrastructure (V2I) communication system operating under spectral scarcity conditions. Existing mathematical models for such a system overlook some but essential ones of its behavioural characteristics. Thus, these models' reported performance results seem to be unrealistically overoptimistic. In this paper, a simulation...
Cooperation in complex networks is an interdisciplinary topic of recent interest. Vehicular ad hoc networks (VANETs), a class of such complex self organizing networks have recently emerged as a platform to develop cooperative communication systems. The evolution of cooperation in these networks depend on the influence from its neighbors. Hence the impact of node neighborhood in terms of degree correlation...
Cognitive radio technologies have been studied for enhancing various aspects of wireless communication in terms of optimization of system parameters or dynamic spectrum access. Recently, testbed implementations have been frequently introduced to verify the feasibilities of these researches. The possibility on sharing TV bands with an unlicensed service is also proved by several platforms for data...
Developments in autonomic network management offer many promises, but its economic benefits are hard to assess. This paper proposes a method to calculate the OPEX gains of a typical network on the basis of a scenario, for which a management framework and autonomous mechanisms have been developed. It makes use of a novel approach, a Toy model, taking into account expert opinions as well as simulation...
Content-Centric Networking (CCN) focuses on content acquisition rather than end-to-end communication by decoupling content resources from special hosts. CCN does not need maintain stable paths between nodes and is independent of IP addresses, which make CCN convenient and efficient for mobile ad hoc network (MANET). In this paper, we develop an analytical model of content acquisition for Content-Centric...
In this paper, we propose a novel approach SDR-CS (Sparse Dimensionality Reduction based on CS) based on compressed sensing to reduce dimensionality. With certain constraint of objective function, our semi-supervised learning method utilizes instance to construct the optimally sparse dictionary in the training dataset, employs K-SVD and OMP algorithms to improve the convergence rate of learning, and...
In cognitive radio networks (CRNs) unlicensed Secondary Users (SU) are allowed to access the resources of licensed Primary Users (PU), if they do not make harmful interference to them. In Cooperative Spectrum Sensing (CSS), SUs sense the spectrum independently and send their sensing information to a fusion center combining the received information and making the final decision about the PU presence...
Designing an efficient search algorithm is a key challenge in unstructured peer-to-peer networks in order to reduce redundant messages in the search process. Addressing the problem, in this paper, a path tracking search algorithm based on the credibility of node service ability(CNSA) is proposed. we utilize the credibility of node service ability as heuristic information to probabilistically guide...
Recently, mobile social networks (MSNs) have been widely discussed due to the rapid growth of smart mobile devices. This work focuses on mobile D2D social networks (MDSNs), where users in an MSN are physical neighbors. An important social application of MDSNs is common profile matching (CPM), which refers to the scenario where a group of smartphone users meet in a small region (such as a ball room)...
Wireless carriers have various churn models that are mainly based on profiling the customers and assigning churn probabilities to them. Profiling is usually limited to their individual data, such as their subscription history, demographics, usage, etc. However, our analysis of a major wireless carrier data shows that such churn prediction methods do not fully model wireless subscriber churn, and that...
Integrating physical objects (smart objects) and enterprise IT systems is still a labor intensive, mainly manual task done by domain experts. On one hand, enterprise IT backend systems are based on service oriented architectures (SOA) and driven by business rule engines or business process execution engines. Smart objects on the other hand are often programmed at very low levels. In this paper we...
New paradigms for web applications have motivated in recent years a series of proposals to update the Internet protocols. One of the proposed protocols is called SPDY, endorsed and developed by Google. This protocol at application layer is able to optimize Web page loading time, allowing additional features such as multiplexing, flow control and priority, and providing security as well. Some SPDY...
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