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This paper investigates quality of service (QoS) provisioning for Internet of Things (IoT) in long-term evolution advanced (LTE-A) heterogeneous networks (HetNets) with partial spectrum usage (PSU). In HetNets, the IoT users with ubiquitous mobility support or low-rate services requirement can connect with macrocells (MCells), while femtocells (FCells) with PSU mechanism can be deployed to serve the...
In heterogeneous relay networks, there are two types of user access connection: direct link and two-hop link. The former is used when a user accesses the Base Station (BS) directly, while the latter, composed of a backhaul link and an access link, is used when a user accesses the BS via a Relay Node (RN). For the RNs with in-band wireless backhaul, two-hop links operate in shared spectrum, and thus...
Macro-femto networks, which comprise a macrocell underlaid with multiple femtocells, have attracted much research attention due to its benefits for capacity increase and coverage extension. However, the mass deployment of femtocells with universal frequency reuse may cause severe interferences, and thus greatly deteriorate system performance. In this kind of systems, access control is an effective...
Recent advancement in live cell fluorescence microscopy has enabled image acquisition at single particle resolution, through which biologists can investigate the underlying mechanisms of cellular processes. In this paper, we present a method to automatically detect the features of sub-cellular particles in 2D fluorescence images, including x-y positions, fluorescence intensities, and relative sizes...
This paper addresses the problem of interference coordination in relay-aided cellular OFDMA systems, aiming at exploiting the benefits of RNs while minimizing the negative effects of interferences introduced. We first analyze the possible interference scenarios in multi-cell OFDMA systems. Based on the insights in our analysis, we propose an Integrated Interference Coordination Scheme (IICS) for cellular...
Topology control for maximizing network capacity for the practical power-fixed IEEE 802.11-based ad hoc networks is deeply investigated in this paper. Several interference-model-based algorithms have been proposed to maximize network capacity through reducing interference during recent years. However, most of those algorithms are based on node location and not practical in IEEE 802.11-based ad hoc...
In this paper, we propose an adaptive threshold estimation method for image denoising based on nonsubsampled contourlet transform (NSCT). The NSCT is developed because of the lack of translation invariance of the contourlet transform. It is good at isolating the smoothness along the contours and can overcome the Gibbs-like phenomena around singularities. The proposed algorithm can adapt different...
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