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As a promising communication paradigm, Cognitive Radio Networks (CRNs) have paved a road for Secondary Users (SUs) to opportunistically exploit unused licensed spectrum without causing unacceptable interference to Primary Users (PUs). In this paper, we study the distributed data collection problem for asynchronous CRNs, which has not been addressed before. We study the Proper Carrier-sensing Range...
In cloud computing, complex data analysis usually requires accessing multiple data sets. Existing MapReduce-based multi-join mechanism implements the join of multiple data sets by cascade method, which is flexible but poor efficiency. The paper analyzes existing concurrent join models and proposes a Two-Dimension Reducer matrix based Hierarchized Multi-Join model (TD-HMJ). TD-HMJ handles all the "key"...
Systematic idea is very basilic in the integrated circuit design, interface between modules is especially important. Serial Peripheral Interface (SPI) is an interface that facilitates the transfer of synchronous serial data, which is engineer's favorite for its convenience and saving system resource. In this paper introduce a new design method, and simulation and realization in FPGA.
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