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Due to the lack of criterion on the efficiency of UHF RFID systems in dense environment, this paper shows a novel test method for UHF EPC C1 G2 RFID readers in a dense environment. A new parameter based on identification rate that describes the performance of readers working in dense environment is demonstrated and a new test method to generate this parameter is given. Experiment show that this test...
OpenFlow has been applied to a variety of demands of the transmission quality of the Internet business and it is still growing on its way. To test this protocol with its evolution consideration, we analyzed the working process of OpenFlow protocol and constructed the CPN model through phasing firstly and then role division for version 1.0. In addition, the selection of tokens and their given values...
To offer flexible and programmable forwarding plane, we propose a solution from the perspective of system architecture. An extensible forwarding element architecture (EFEA) based on SDN is proposed, in which the core part is three layer forwarding element architecture (TLFEA). It also includes FE OS image service in SDN controller, FE OS image management system, FE OS development system. In order...
Most application layer multicast (ALM) protocols build the delivery tree by the distributed way, which is necessary for large-scale group applications because of its good scalability. However, it is difficult for the distributed way to obtain high performance. To address the above problem, we study a VM-assisted ALM tree optimization solution (called ALMTO). The proposed solution uses cloud virtual...
Rate adaptation is an essential component in today's wireless standards, for its ability to adaptively approach the channel capacity, and maximize the system throughput. The difficulty in rate adaptation stems from estimating the optimal data rate in a fluctuated channel. Previous wisdoms leverage PHY layer information for rate estimation, such as Soft PHY hints or Channel State Information. These...
Virtual Reality and Distributed Simulation are two pop technologies used in military training and simulation. Routine way to implement an HLA application is by calling RTI APIs, but it is always fussy and fallible. In this paper, VR-Link is taken as a development tool for HLA and Vega is chosen as a graphic engine. The flow chart and the implementation of the HLA-based training application are described...
The telemetry acquisition and analysis system of pulse wave is developed in order to provide a mutual platform for teaching the course "Digital Signal Processing". Student's pulse wave is used as the sampling signal in the test. The collecting and receiving modules are designed by using the microcontroller unit of CC2430 as core processor. Zigbee is adopted for radio transmission. The program...
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