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Recently, the architecture of elastic optical network (EON) has been proposed as a candidate solution to accommodate both huge bandwidth requirements and flexible connections in next generation optical networks. In order to improve the spectrum efficiency, we propose different spectrum-space-divided approaches and develop two integer linear programming (ILP) models and several spectrum-space-divided...
Software Defined Radio (SDR) is one of possibilities to realize the structure of device with a high mobility, flexibility and reconfigurability. This technology can provide the seamless shifting between existed air-interface standards. Extending the flexibility further, a system capable to sense the spectrum space available for communication and adapt to it is Cognitive Radio. Obviously SDR in Cognitive...
This paper uses a new class of complete orthogonal system in L2[0, 1], which consists of piecewise polynomials (called V-system), to process shape recognition. A novel boundary based shape recognition method is proposed. First the contour of an object is regarded as a geometric graph, and the graph is expanded in a V-series, which transform the graph to the spectrum space and quantify overall feature...
The advances on wireless mesh networks are shifting the communications paradigm, where users can benefit from their cooperation to exchange information and make use of the spectrum space, forming wireless neighbourhood communities where resources are shared and services are distributed. This paper presents a modular cross-layer community management architecture, which considers that communities are...
Interference temperature is a measure of how well a radio operating with a particular protocol and modulation scheme can tolerate interference in its spectrum space. We consider this tolerance metric for the IEEE 802.11 protocol for wireless networking. In experiments with off-the-shelf devices in the laboratory, we characterize the tolerance of the protocol to interference at various frequencies...
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