دانلود رایگان مقاله پیاده سازی شبکه رادیو شناختی برای ارزیابی استراتژی مدیریت طیف در زمان واقعی

Abstract

This paper illustrates a Universal Software Radio Peripheral (USRP)-based real-time testbed that is able to evaluate different spectrum management solutions that exploit the Cognitive Radio (CR) paradigm. The main objective of this testbed is to provide an accurate and realistic platform by which the performance of innovative spectrum management solutions for a wide set of scenarios and use cases in the context of Opportunistic Networks (ONs) and Cognitive Radio Networks (CRNs) can be entirely validated and assessed before their implementation in real systems. Real-time platforms are essential to carry out significant studies and to accurately assess the performance of innovative solutions before their implementation in the real world. This work provides a comprehensive description of the testbed, highlighting many interesting implementation details and illustrating its applicability for different studies that rely on the CR paradigm. Then, a particular application in a realistic Digital Home (DH) scenario is also illustrated, which allows demonstrating the effectiveness of the real-time testbed and assessing its practicality in terms of user-perceived end-to-end Quality of Experience (QoE) in a realistic environment.

6. Conclusions

This work has presented a real-time emulation platform for spectrum management in the context of opportunistic networks and more general cognitive radio networks. The aim of this testbed is to provide a highly accurate and realistic platform on which the performance of innovative spectrum management strategies relying on the cognitive radio paradigm can be fully assessed and evaluated before considering them in real systems. Although several analytical models and off-line simulators found in the literature provide powerful tools for obtaining preliminary results, it is also necessary to provide to the research and industrial community real-time platforms that reflect a complete realistic environment. In this context, this paper has accurately described a real-time testbed that enables the emulation of spectrum management strategies with applicability in a wide set of scenarios and use cases exploiting the cognitive radio paradigm. This paper has provided an in-depth description of the real-time platform, highlighting many interesting implementation details and illustrating its applicability for different solutions developed for opportunistic networks and cognitive radio networks. Moreover, the demonstration of streaming video in a realistic Digital Home (DH) scenario has allowed validation of the effectiveness of the real-time testbed, assessing its practicability in terms of user-perceived end-toend Quality of Experience (QoE) in a realistic environment. As a part of the future work, the extension of the number of the nodes and the potential addition of new entities in the infrastructure node to support novel radio technologies are envisaged. Possible innovative technologies include Device-to-Device (D2D) communications in the context of 5G wireless networks; Unlicensed LTE (U-LTE) technology, which has been proposed as an innovative way to expand LTE spectrum capacity; and energy-efficient CR solutions, which are expected to optimize spectrum sharing and energy efficiencies jointly.