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Cognitive PHY and MAC layers for dynamic spectrum access and sharing of TV bands

机译:用于动态频谱访问和电视频段共享的认知PHY和MAC层

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摘要

Research in the physical (PHY) and medium access control (MAC) layers for dynamic spectrum access (DSA) and dynamic spectrum sharing (DSS) is still at its infancy. Aspects such as spectrum sensing, coexistence, measurement and spectrum management, network reliability and QoS support in face of the need to avoid causing harmful interference into incumbents, to name a few, are key to the success of future cognitive radio (CR) systems and have received little attention so far. In addition, it is critical to understand the interplay of these various cognitive radio concepts and how they impact the overall network performance. In this paper we address these questions by presenting the design and performance evaluation of a CR-based PHY and MAC for DSA and DSS of vacant television (TV) channels. This air interface described here forms the baseline of the current IEEE 802.22 draft standard, and features a number of key PHY and MAC CR-based components for use by license-exempt devices in the spectrum that is currently allocated primarily to TV services. Through simulations and prototyping, we analyze the performance of this first CR-based wireless network with respect to spectrum sensing, system capacity, QoS support, coexistence, and network reliability.

机译:

在物理(PHY)和媒体访问控制(MAC)层中进行动态频谱访问(DSA)和动态频谱共享(DSS)的研究仍处于起步阶段。面对避免对现有运营商造成有害干扰的需求,频谱感测,共存,测量和频谱管理,网络可靠性和QoS支持等方面是未来认知无线电(CR)系统成功的关键,并且到目前为止,很少受到关注。此外,至关重要的是要了解这些各种认知无线电概念之间的相互作用以及它们如何影响整体网络性能。在本文中,我们通过为空电视(TV)频道的DSA和DSS提供基于CR的PHY和MAC的设计和性能评估来解决这些问题。此处描述的空中接口构成了当前IEEE 802.22标准草案的基准,并具有许多主要基于PHY和MAC CR的组件,供当前主要分配给电视服务的频谱中的免许可证设备使用。通过仿真和原型制作,我们从频谱感知,系统容量,QoS支持,共存和网络可靠性方面分析了第一个基于CR的无线网络的性能。

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