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In this paper, a simple but efficient permutation enhanced parallel reconstruction architecture for compressive sampling (CS) is proposed. In this architecture, a measurement matrix is constructed from a block-diagonal sensing matrix, the sparsifying basis of the target signal, and a pre-defined permutation matrix. In this way, the projection of the signal onto the sparsifying basis can be divided...
Shape recognition, an important portion of image processing, has been widely applied in many research and application areas. Traditional Hough transform, which is a modern shape recognition technique, incurs unbearable execution time and memory storage cost during the extraction of high-dimensional shapes. This paper presents an approach for circle extraction based on generalized image projection...
Push-to-Talk over Cellular (PoC) is a "walkie-talkie" like voice communication service over mobile wireless networks, based on Voice over IP (VoIP) technology. The traditional PoC defined in the Open Mobile Alliance (OMA) specification is a centralized architecture. In this architecture, servers need to be deployed for the PoC service to work and be widely available, presenting a substantial...
Femtocells, also called home base stations, are small cellular access points installed by home users to get better indoor voice and data coverage with lower network operation cost. Considering the coexistence of eNB (macro cell) and a huge number of Home eNBs (femto cells), the assignment of Physical Cell Identity (PCI) among the different cells would be quite complex, especially in the user-deployment...
The Hybrid CDN-P2P architecture, or HCDN, which combines the complementary advantages of CDN and P2P networks, has been proposed to reduce the deployment cost and to improve the quality of service in file sharing and video streaming applications. A replica placement algorithm (RPA) decides where to replicate the specific data. Existing RPAs for pure CDN do not work efficiently in the HCDN architecture...
Femto cells, also called home base stations, are small cellular access points installed by home users to get better indoor voice and data coverage with lower network operation cost. In this paper, the deployments of femto cells within LTE cellular networks are investigated. Based on the current partial co-channel deployment configuration for LTE Home evolved NodeB, a novel scheme of femtocell-aware...
Hybrid content distribution network (HCDN), integrating complementary advantages of CDN and P2P, is used to improve efficiency of large-scale content distribution. In this paper, to achieve in-depth understanding of HCDN??s effectiveness, we carry out a detailed performance evaluation based on deterministic fluid model. We also provide numeric results of HCDN, comparing with conventional CDN and P2P...
CDN (Content Delivery Network) and P2P (Peer-to-Peer) are two dominant technologies in large-scale content distribution. However, they have their own advantages and disadvantages. In this paper, an efficient hierarchical content distribution scheme is proposed, integrating the traditional CDN and centralized P2P. In our approach, content distribution is divided into two stages. In the CDN-level core...
Service-oriented architecture (SOA) for distributed computing has become increasingly popular due to the great advantage that distributed applications can be rapidly synthesized with the needed services provided by various service providers through broadband networks. Systems based on SOA are called service-based systems (SBS). An important and difficult issue is how to develop SBS adaptable to constantly...
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