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LTE-based Public Safety Network (PSN) is a wireless communication network which can provide efficient and reliable communication in disasters or emergencies for disaster relief and public protection. Therefore, ensuring that network congestion will not happen in PSN during an emergency is becoming increasingly important. LTE-based PSN is easy to be congested because part of spectrum resources is compressed...
To reduce the energy consumption in heterogeneous 5G access networks, we propose a cooperative energy-saving mechanism based on user association (UA-CESM). Joint processing (JP) and centralized resource scheduling are introduced into the mechanism to solve inadequate coverage problem caused by base-station (BS) dormancy by means of cooperative BS selection and BS state control. First, the number of...
In order to remove desired signal component from the sample covariance matrix, a novel robust adaptive beamformer is proposed based on desired signal covariance matrix estimation. The desired signal direction is first calculated based on the first-order Taylor series approximation, and then the desired signal's steering vector and power are estimated by using iterative robust minimum variance beamforming,...
In this study, the target detection based on single surveillance channel is proposed in passive bistatic radar (PBR) system. The reference signal is recovered from the covariance matrix. The cancellation performance of the recovered reference signal is further investigated, and the reason for the poor cancellation performance is also analyzed. In order to improve the performance, the maximization...
To reduce the energy consumption of the LTE-A system, a distributed energy-saving mechanism based on CoMP (CoMP-DESM) is proposed to solve the inadequate coverage problem under the dormant cells. First, the network is divided into clusters based on the equivalent cell principle. Then, we transfer global optimization into a group of subproblems. Second, a joint processing- based cooperative cell selection...
Load balancing is one of the key target of LTE Self-Optimization Network (SON). In this paper, we propose a load balancing method for LTE downlink network, namely Load Vector Minimization based Load Balancing (LVMLB) method. Load Vector (LV) is a vector whose elements are the load values of cells and sorted in descending order. The order of LVs is defined by the lexicographical order. The smaller...
The current power consumption of intelligent terminals are over burden for their battery capacities, which directly restrict the hours used. In order to realize the energy saving of terminals in the LTE-A system, this paper puts forward the concept of virtual cells and a related uplink energy saving mechanism. Virtual Cell's resources and the outage probability of terminals are proposed by this mechanism...
Aiming to resolve insufficiency of existing Energy-Saving (ES) methods in heterogeneous network, a novel self-organizing ES mechanism to improve energy efficiency suitable for heterogeneous networks is proposed. In the mechanism, we come up with the self-organizing procedures, the traffic model, and an optimizing objective model. The mechanism is then simulated under an urban LTE scenario with 7 macro...
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