Smart Spectrum for Future Wireless World
Smart Spectrum for Future Wireless World
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DOI：
10.1587/transcom.2016pfi0014
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发表时间：
2017-03
期刊：
影响因子：
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通讯作者：
T. Fujii;K. Umebayashi
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文献类型：
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作者：
T. Fujii;K. Umebayashi
随着无线通信在实现人与物的未来互联社会中的作用越来越重要，由于移动终端数量庞大，应用类型繁多，频谱短缺问题日益严重。在未来无线世界中，为了在有限的频谱资源下实现可持续的无线连接，需要开发一种考虑周围无线电环境和用户偏好的动态频谱管理方案。在本文中，我们讨论了未来无线世界的一种新的频谱利用框架，称为“智能频谱”。实现智能频谱有四个主要问题。首先，为了准确识别频谱环境，频谱测量是一项重要的技术。其次，为了设计共享频谱环境下动态频谱使用的无线参数，需要利用测量结果对频谱使用情况和频谱环境进行估计的频谱建模。第三，为了有效地收集测量结果并向用户提供频谱信息，可以使用基于测量的频谱数据库。最后，要实现高效、有组织的频谱动态利用，需要与频谱数据库相结合的智能频谱管理。本文讨论了智能频谱的概念、智能频谱的基础研究以及面向未来无线世界的智能频谱的发展方向。关键词：智能频谱，频谱测量，频谱使用建模，频谱数据库，频谱管理
As the role of wireless communication is becoming more important for realizing a future connected society for not only humans but also things, spectrum scarcity is becoming severe, because of the huge numbers of mobile terminals and many types of applications in use. In order to realize sustainable wireless connection under limited spectrum resources in a future wireless world, a new dynamic spectrum management scheme should be developed that considers the surrounding radio environment and user preferences. In this paper, we discuss a new spectrum utilization framework for a future wireless world called the “smart spectrum.” There are four main issues related to realizing the smart spectrum. First, in order to recognize the spectrum environment accurately, spectrum measurement is an important technology. Second, spectrum modeling for estimating the spectrum usage and the spectrum environment by using measurement results is required for designing wireless parameters for dynamic spectrum use in a shared spectrum environment. Third, in order to effectively gather the measurement results and provide the spectrum information to users, a measurement-based spectrum database can be used. Finally, smart spectrum management that operates in combination with a spectrum database is required for realizing efficient and organized dynamic spectrum utilization. In this paper, we discuss the concept of the smart spectrum, fundamental research studies of the smart spectrum, and the direction of development of the smart spectrum for targeting the future wireless world. key words: smart spectrum, spectrum measurement, spectrum usage modeling, spectrum database, spectrum management