Nowadays,H.264/AVC is an effective standard for video ***,with the growing demand for higher compression ratio of moving pictures in various applications,it' s quite desirable for new methods which adapt to high d...
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Nowadays,H.264/AVC is an effective standard for video ***,with the growing demand for higher compression ratio of moving pictures in various applications,it' s quite desirable for new methods which adapt to high definition videos in the flexible *** order to improve the efficiency of the intra prediction for videos,especially for the high definition ones,we propose a new algorithm to establish intra prediction,which processes pixels based on line with adaptively detecting the texture *** results demonstrate that,compared with H.264/AVC intra method,the proposed algorithm has achieved much better prediction,and reduced the complexity in the meantime.
Metro WiFi networks can be potentially leveraged to offload data traffic from congested cellular *** this paper,we design a content pushing system which pushes the content to mobile users through opportunistic WiFi **...
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Metro WiFi networks can be potentially leveraged to offload data traffic from congested cellular *** this paper,we design a content pushing system which pushes the content to mobile users through opportunistic WiFi *** system responds a user’s pending requests or predicted users’ future requests,codes these requested contents by using Fountain codes,predicts the user’s routes,and prelocates the coded content to the WiFi access points along the user’s *** content prelocation scheme is based on an order-2 Markov predictor and the connection duration *** simulations,we show that a significant amount of content can be delivered to mobile users through the proposed system.
Dynamic spectrum leasing is emerging as a promising technique to improve the utilization of *** auction is proved to be an effective method for secondary users(SUs) to lease the idle frequency *** this article,we inve...
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Dynamic spectrum leasing is emerging as a promising technique to improve the utilization of *** auction is proved to be an effective method for secondary users(SUs) to lease the idle frequency *** this article,we investigate the mechanism design of dynamic spectrum leasing based on uniform price auction and focus on the challenges of budget constraints under multi-object *** we propose a modified uniform price mechanism with truetelling property,which can achieve a quick and efficient allocation of the spectrum.
In this paper,we investigate the effects of outdated channel state information at the transmitters(CSIT) on the diversity-multiplexing trade-off(DMT) performance in a scenario based on distributed opportunistic nonort...
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In this paper,we investigate the effects of outdated channel state information at the transmitters(CSIT) on the diversity-multiplexing trade-off(DMT) performance in a scenario based on distributed opportunistic nonorthogonal decode-and-forward relaying channel,where the available CSIT is obtained by the outdated information *** study is conducted by deriving a closed-form DMT expression as a function of the correlation coefficient between the outdated CSIT and the accurate *** results are presented to verify our analysis.
As a key technology for realizing future networks(FNs),network virtualization has attracted worldwide ***,how to construct a suitable virtual network(VN) requires effective techniques for VN *** this paper,we present ...
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As a key technology for realizing future networks(FNs),network virtualization has attracted worldwide ***,how to construct a suitable virtual network(VN) requires effective techniques for VN *** this paper,we present a new VN mapping algorithm that can guarantee the network *** uses both node resources and connected link resources as the metric of available node resources in node *** chooses link betweenness sensitivity as the cost of a link when using k-shortestpath algorithm in link *** simulation results show that the proposed algorithm guarantees the network robustness while increasing the acceptance ratio.
In this paper, we first define the problem of computation of the potential hidden node area and the extra coverage area that can benefit from rebroadcasts in broadcast ad hoc networks and abstract two types of computa...
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In this paper, we first define the problem of computation of the potential hidden node area and the extra coverage area that can benefit from rebroadcasts in broadcast ad hoc networks and abstract two types of computations as a geometric coverage area computation problem. Then, under two distinct distributions of the nodes in the network, we derive the closed-form expressions of the cumulative distribution functions and the probability density functions of the distance between the source node and the nodes (especially, the farthest node) within its transmission range. Finally, the defined coverage area can be derived through the density functions in one-dimensional case. This calculation can be beneficial to the design and analysis of multi-hop broadcast ad hoc networks.
We present an algorithm for spoken keyword spotting using subsequence Dynamic Time Warping(DTW) in spoken *** of using word or phone string as query terms,we use the utterances of user to act as *** matches in the tes...
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We present an algorithm for spoken keyword spotting using subsequence Dynamic Time Warping(DTW) in spoken *** of using word or phone string as query terms,we use the utterances of user to act as *** matches in the test data are located using subsequence DTW to search between query templates and reference spoken *** DTW is a variant of DTW technique,which is designed to find multiple similar subsequences between two *** introduce subsequence DTW into spoken keyword spotting to realize the keyword spotting under low-resource situations in which no in-domain training material is *** using this approach are presented using TIMIT corpus.
As the idea of smart grid was brought up and with its fast development,higher storage capacity and stronger processing ability of power system information processing platform are *** at making up for the lack of infor...
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As the idea of smart grid was brought up and with its fast development,higher storage capacity and stronger processing ability of power system information processing platform are *** at making up for the lack of information management and service request,Mobile-agent is used in this paper to serve as the information interaction mechanism of power system cloud computing platform,so as to implement synergistic model of power system cloud *** model is layered in accordance with the hierarchical structure of power grid,and can realize resource scheduling and synergistic management by using Mobile-agent to build a strong and efficient power system cloud computing *** power grid user ’ s request is presented as an example here to explain the information interaction pattern and the application of this model in detail.
Cognitive radio has been considered as promising techniques in wireless networks. However, most of previous works are focused on spectrum sharing and interference avoidance, and the energy management aspect is largely...
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Cognitive radio has been considered as promising techniques in wireless networks. However, most of previous works are focused on spectrum sharing and interference avoidance, and the energy management aspect is largely ignored. In this paper, we study power allocation in the environment of CR network without central processing unit: cognitive radio Ad hoc networks (CRAHNs). To improve the efficiency of management and the convergence speed of algorithm, we design the power sensing and adjusting scheme, and then propose iteration algorithm based on Best-response dynamics game. The maximum of total throughput is obtained by this scheme with the restriction of interference to primary users (PUs). Simulation results are presented to demonstrate the proposed scheme improved significantly in the performance with QoS demand.
The Observed Time Difference of Arrival (OTDOA) as a major positioning method in 3rd Generation Partnership Project (3GPP) specification has been deeply researched in Long Term Evolution Advanced (LTE-A) system. This ...
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The Observed Time Difference of Arrival (OTDOA) as a major positioning method in 3rd Generation Partnership Project (3GPP) specification has been deeply researched in Long Term Evolution Advanced (LTE-A) system. This paper analyzes the new interference scenarios in Heterogeneous Network (Het-Net) and the drawbacks of conventional OTDOA method which are caused by LPN (Low Power Nodes) deployed in Het-Net. In this paper, we propose a Time division multiplex (TDM) and a Code division multiplex (CDM) scheme for positioning reference signal (PRS) transmitting to solve these problems in Het-Net. Simulation results show that the proposed scheme can greatly improve the positioning accuracy compared with the conventional method and its performance meets the Federal communication commission (FCC) requirement.
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