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The emergence of 5G wireless communication calls for new paradigms to satisfy the individuation and diversification of users' demands. In this paper, we construct the multicast groups under the guidance of user interest and then allocate the subcarriers and power to these groups in orthogonal frequency division multiple (OFDM) networks. Specifically, in order to maximize the social utility related...
In this work, a multi-floor Poisson point process (MFPPP) model is proposed to analyze the performance of wireless networks inside a building, where the impact of penetration loss and floor height on the network performance is taken into consideration. According to the proposed MFPPP model, the coverage probability of the cross-floor max-signal-to-interference-plus-noise-ratio (SINR) association (CFMSA)...
In this paper, the problem of joint dynamic spectrum access and multi-relay selection is investigated in relayenabled cooperative communication systems to maximize the system sum-capacity. Since the considered problem is a mixed integer nonlinear program, which is generally intractable to find the optimal solution, two matching theory-based suboptimal algorithms are proposed to reduce the computational...
-In recent years, a lot of interest has been drawn to the so-called multiple input multiple output (MIMO) systems in their potential to achieve enormous capacity gains. This increase in capacity is dependent upon the propagation environment exhibiting sufficient scattering. The characterization of MIMO channels is therefore required in order to analyze the performance of such systems in real environments...
The authors of the paper build a heterogeneous surveillance sensor network concerning the relay transmissions of the sensor network nodes among and within the clusters, based on which a binary work node is built to ensure balanced energy consumption of the network. An analysis is also made on the service life of the network in bin-packing conditions, following which an optimal solution is found to...
Wireless sensor network is expected to be deployed in intersection to monitor the traffic flow continuously, and the monitoring data can be used as the foundation of traffic light control. In this paper, a traffic information and transmission system based on Zigbee and wireless sensor network is built, and the sensor nodes used in traffic flow surveillance are developed. Structure, hardware and work...
Radio spectrum has become a precious resource, and it has long been the dream of wireless communication engineers to maximize the utilization of the radio spectrum. Dynamic Spectrum Access (DSA) and Cognitive Radio (CR) have been considered promising to enhance the efficiency and utilization of the spectrum. In current overlay cognitive radio, spectrum sensing is first performed to detect the spectrum...
For the purpose of enhance the security of poor working in coal mine, it's important to study on the problem of location and tracking for keeping mining personnel and down hole equipments safe. We put forward wireless sensor network underground location algorithm which is based on the superposition of RSSI and DV-Hop. This algorithm makes up for the shortage of RSSI algorithm and DV-Hop algorithm...
In order to enhance the security of poor working underground environment, it's important to study on the problem of location and tracking for keeping mining personnel and down hole equipments safe. We put forward wireless sensor network underground location algorithm which is based on the superposition of RSSI and DV-Hop. This algorithm makes up for the shortage of RSSI algorithm and DV-Hop algorithm...
The heterogeneous surveillance sensor network can balance the energy consumption better than homogeneous one, and cellular can cover the whole surveillance field without any gap or overlap. Based on the preconditions above, the authors propose the energy consumption and network lifetime models of heterogeneous surveillance sensor network in the condition of cellular coverage. The optimal solution...
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