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In this paper, we focus on a Device-to-device (D2D) cluster assisted cellular communication in video stream sharing scenario. A solution for energy saving in base station (BS) for downlink transmission is proposed with constraint on D2D cluster's energy consumption. We take peak signal-to-noise ratio (PSNR) as the measurement for video quality and consider both the downlink transmission energy and...
Current one-to-one wireless communications is reaching the Shannon limit. Previous works have studied space multiplexing schemes, e.g., superposition coding and successive interference cancellation, to overcome the limitation. In this paper, we focus on a network multiple-input multiple- output (MIMO) architecture, which is one such space multiplexing scheme, where multiple access points in the network...
As the demand for mobile data services skyrockets and the scarcity of spectrum increasing, femtocell networks overlaying with macrocell networks becomes a promising solution. However, the dense and random deployment of femto-cells and their uncoordinated operations cause severe inter-cell interference. This paper studies cluster-based wireless resource management issues in ultra-dense networks (UDN)...
We consider the joint routing and cooperation diversity problem in multi-hop networks, for which we seek to optimize the end-to-end outage. Simplifying the network structure via partitioning and identifying a set of nodes in each partition, we devise a routing strategy based on cooperative relays in decode-and-forward mode. In particular, this sub-optimal routing algorithm yields the best possible...
Wireless Sensor Network is fabricated by the deployment of many miniature devices (sensors) which are capable of sensing, communicating and computing. These networks are susceptible to security threats due to unattended deployment of sensors. There are many attacks on information in transit, out of all Black hole attack or packet dropper is a denial of service attack in which an intruder persuades...
The limited sensor node energy and the large number of nodes with dynamic network topology information have always been the important design concerns in Wireless Sensor Networks (WSN). Node clustering is an effective way to tackle with the two issues by grouping the nodes into hierarchies in order to reduce communication distance and the amount of message. This paper mainly focuses on the unification...
Aimed at the uneven energy consumption and data redundancy problem of the long-distance ribbon wireless sensor network, a cluster topology control algorithm is proposed based on the topology of ribbon wireless sensor network. The algorithm optimizes the cluster head selection mechanism and effectively guarantees sensor nodes with more residual energy and less communication cost as a cluster head....
According to increase of multimedia applications such as video surveillance and environment monitoring in Wireless Multimedia Sensor Networks (WMSN), energy conservation and prolonging network lifetime become increasingly important. Therefore, energy conservation and maximization of system lifetime are commonly recognized as a key challenge in the design and implementation of WMSNs. In these networks,...
Femtocells have great potential to enhance home cellular access and improve macrocell network efficiency by offload local traffic. However, dense deployment imposes critical challenges to resource management (i.e., interference mitigation and sub-channels allocation).In this paper, to formulate this resource management of femtocell, we propose broker based many-to-many bipartite matching game and...
This paper introduces extensions of a previously proposed range-dependent modified Gilbert model for generation of realistic error patterns. With the proposed extensions our model can be used to generate signal-to-noise ratio trends corresponding to the error patterns for infrastructure-to-vehicle communications. The model parameters are estimated based on realistic highway measurements using off-the-shelf...
Cluster-sparse channels often exist in frequency-selective fading broadband communication systems. The main reason is received scattered waveform exhibits cluster structure which is caused by a few reflectors near the receiver. Conventional sparse channel estimation methods have been proposed for general sparse channel model which without considering the potential cluster-sparse structure information...
The constrained capacity of wireless sensor nodes and harsh, unattended deploy environments make the data collected by sensor nodes usually unreliable. We have proposed a count-min sketch based anomaly detection scheme with the goal of detecting the anomaly data values in WSN. In this paper, we analyze the performance of the proposed scheme thoroughly. We show through experiments with real sensed...
Energy consumption is an important issue in the design of Wireless Sensor Networks (WSNs) which typically are powered by limited energy. A suitable clustering algorithm for grouping sensor nodes can raise energy efficiency for WSNs. However, there exist some overheads for clustering, such as cluster-head selection, assignment, and cluster construction. In this paper, we propose a new regional energy...
In this paper, the problem of content-aware user clustering and content caching in wireless small cell networks is studied. In particular, a service delay minimization problem is formulated, aiming at optimally caching contents at the small cell base stations (SCBSs). To solve the optimization problem, we decouple it into two interrelated subproblems. First, a clustering algorithm is proposed grouping...
Energy is one of the most critical optimization objectives in wireless sensor networks. Compared with renewable energy harvesting technology, wireless energy transfer based on magnetic resonant coupling is able to provide more reliable energy supplies for sensors in wireless rechargeable sensor networks. The adoption of wireless mobile chargers (mobile vehicles) to replenish sensors' energy has attracted...
In this paper, we examine distributed and fair resource allocation for weighted sum multicell capacity maximization in multi-input single-output (MISO)-Orthogonal Frequency-Division Multiple Access (OFDMA) multicell systems with reduced feedback links. We apply zero forcing (ZF) precoding to reduce interference between the users in the same cell and then propose iterative distributed power allocation...
The constraint conditions and life time issue is analyzed through network optimization model. In this paper, the distribution of cluster head is uniform, the nodes in the cluster employ 1-hop to communicate with cluster head, and the cluster heads use multi-hop and the minimum energy to communicate and transmit data with the sink node. An energy independent cluster routing (EICR) is put forward to...
Based on the application of continuous objects monitoring (COM) for Wireless Sensor Networks (WSNs), the sampling data collected by the sensors have relatively higher correlation and continuity due to the reason that the characteristic parameters of the monitored objects are continuous both in time and in space. In this paper, an Optimal Fusion Set based Clustering (OFSC) algorithm is presented to...
Wireless sensor network consisting of various tiny wireless sensor nodes that are equipped with transmission devices that require some amount of energy to transmit the data to other node(s). Most often we cannot charge or change the battery of sensor nodes during transmission. To preserve the longetivity of the network it is very challenging task to build a sensor node that require very little amount...
Wireless electrocardiography (ECG) systems are crucial in detecting and diagnosing heart disorders. Minimizing power consumption and sampling-rate should be the key aspects when designing wireless ECG systems. In order to achieve portability coupled with ultra-low power consumption and sampling-rate, clustering and classification algorithms play an important role in developing wireless ECG systems...
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