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We investigate the QoE-centric heterogeneous network selection problem. Users usually struggle for the maximum throughput when select access network. However, compared to QoS-centric optimization mechanism, in order to get more rational allocation of resources and improve the resource utilization, we seek the QoE optimization method mechanism instead. The(More)
Remote sensing images are the important data source of geo-information services with larger data volume and extremely stringent space accuracy. Reliable data are the core of current credible geospatial services. Encryption is the basic protection measure to maintain the integrity, confidentiality and privacy of data. The proposed encryption scheme combines(More)
This article investigates the problem of achieving global optimization for joint channel selection and power control in the cognitive radio networks. Existing schemes modeled the local interference relationship in channel selection by undirected graphs, which however, failed to characterize the directed interference property. In this paper, we reveal the(More)
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