毫米波频谱接入时代的动态频谱共享
Dynamic Spectrum Sharing in the Age of Millimeter Wave Spectrum Access
摘要：
下一代无线网络正面临频谱短缺的挑战，主要原因包括预计将有大量物联网连接以及此类网络应该服务的新兴带宽需求应用。频谱是稀缺和昂贵的，因此，它是至关重要的，设计动态和灵活的频谱接入策略和技术，产生最佳使用这样一个宝贵的资源。最近被采用作为这种频谱稀缺挑战的关键解决方案的一个新趋势是利用更高的频带，即毫米波频带，这在几年前被认为是不切实际的，但现在由于电子技术的最新进步而变得可行。尽管幸运的是，频谱监管机构已经做出了回应，允许在毫米波频率中使用新频段，但仍需要做大量工作才能从这些新频谱中受益。在本文中，我们讨论了一些关键的频谱管理的挑战，涉及在毫米波频率的动态频谱接入，这需要克服，以促进在这些毫米波频段的动态频谱共享。我们还提出了新的技术，通过解决一些讨论的挑战，使有效的动态频谱共享在毫米波频段，并强调开放的研究挑战，仍然需要解决，以充分释放在毫米波频段的动态频谱共享的潜力。
英文摘要：
Next-generation wireless networks are facing spectrum shortage challenges, mainly due to, among other factors, the projected massive numbers of IoT connections and the emerging bandwidth-hungry applications that such networks ought to serve. Spectrum is scarce and expensive, and therefore, it is of crucial importance to devise dynamic and flexible spectrum access policies and techniques that yield optimal usage of such a precious resource. A new trend recently being adopted as a key solution to this spectrum scarcity challenge is to exploit higher frequency bands, namely mmWave bands, that were considered impractical few years ago, but are now becoming feasible due to recent advances in electronics. Though, fortunately, spectrum regulatory bodies have responded by allowing the use of new bands in the mmWave frequencies, much work still needs to be done to benefit from such new spectra. In this paper, we discuss some key spectrum management challenges that pertain to dynamic spectrum access at the mmWave frequencies, which need to be overcome in order to promote dynamic spectrum sharing at these mmWave bands. We also propose new techniques that enable efficient dynamic spectrum sharing at the mmWave bands by addressing some of the discussed challenges, and highlight open research challenges that still need to be addressed to fully unleash the potential of dynamic spectrum sharing at mmWave bands.
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