ITR: The 3 R's of Spectrum Management: Reduce, Reuse and Recycle

最近许多创新的无线设备都依赖于未经许可的频谱，这是因为它对新的用途和用户开放。与此同时，大量频谱仍然被独家授权给需求稀少的服务和使用过时技术的标准。目前共享有限的未经许可的频谱的方式也远不完美：设备即使在没有干扰问题的情况下也受到非常有限的范围的影响，并且当来自不同系统的用户共享其本地频谱时，性能严重下降。我们通过传统的资源使用的3R的视角来看待频谱管理：减少、重用和回收。虽然到目前为止，Reduced受到了工程界最多的关注，但回收和重用方面的研究还处于更原始的状态。但后两个领域的进展将是开放和有效共享整个频谱的关键。频谱回收指的是促进共享和提高整体频谱效率，同时保持与模拟广播和蜂窝标准等遗留系统用户的向后兼容。频谱重用是指多个无线系统协同共存，利用有限的交互公平、高效地共享频谱。本研究结合了物理层无线通信、多用户信息论和分布式编码、资源分配和博弈论分析的思想，对这两个问题领域的基本原理进行了广泛、系统和跨学科的研究。

Many of the innovative recent wireless devices rely on the unlicensed spectrum, spurred by its openness to new uses and users. At the same time, vast amounts of spectrum are still exclusively licensed to services with sparse demand and to standards that use antiquated technologies. The current way of sharing thelimited unlicensed spectrum that we do have is also far from perfect: devices suffer from very limited range even when there are no interference problems, and severe performance degradation when their local spectrum is shared by users from heterogeneous systems.We look at spectrum management through the lens of the traditional 3 R's of resource use: Reduce, Reuse and Recycle. While Reduce has received by far the most attention from the engineering community, research in Recycle and Reuse is at a much more primitive state. But it is progress in the latter two areas that will be critical for the open and efficient sharing of the spectrum as a whole. Spectrum Recycling refers to fostering sharing and improving overall spectral efficiency while maintaining backward-compatibility with users oflegacy systems like analog broadcast and cellular standards. Spectrum Reuse refers to the collaborative coexistence of multiple wireless systems, using limited interaction to share the spectrum fairly andefficiently. The proposed research takes a broad, systematic and inter-disciplinary approach to the fundamentals of these two problem areas, combining ideas from physical layer wireless communications,multiuser information theory and distributed coding, resource allocation and game theoretic analysis.