Policies for Cellular Television

对频谱的需求不断增长，如果没有新的和更有效的频谱使用方法，就无法满足这种需求。卡内基梅隆大学的乔恩·佩哈（Jon Peha）和佩德罗·费雷拉（Pedro Ferreira）教授正在研究蜂窝电视的技术、经济和政策问题，这是一种非传统的无线广播电视传输方式，一些人认为它可以释放大量频谱用于其他目的，同时从根本上改变电视行业。蜂窝电视包括单频网络（SFN）和使用蜂窝数据服务上的高效多播来传送广播空中电视的网络。该项目正在评估蜂窝电视的潜力及其对决策者和监管者的影响。使用考虑无线信号传播和视频内容实际需求分布的模型，研究人员正在研究有效支持蜂窝电视所需的基础设施，以及使用这种新方法提供广播服务的相应短期和长期工程经济学。他们正在研究这些架构如何影响其他无线系统的频谱可用性和性能，如宽带蜂窝系统和电视白色空间设备。研究人员将使用通过对有线电视系统的经验观察得出的实际用户行为数据来开发和评估算法，这些算法通过考虑用户观看的节目以及这些节目在时间和空间上的流行程度如何变化来实现更大的频谱共享和效率。研究人员还在研究各种可能影响或受蜂窝电视出现影响的法律法规。

There is growing demand for spectrum that cannot be met without new and more efficient approaches to spectrum use. Professors Jon Peha and Pedro Ferreira of Carnegie Mellon University are examining the technical, economic, and policy issues of cellular television, an unconventional approach to the delivery of over-the-air broadcast television that some believe could free up vast amounts of spectrum for other purposes while fundamentally transforming the television industry. Cellular television includes both single frequency networks (SFNs), and networks using efficient multicast over cellular data services for delivery of broadcast over-the-air television. This project is assessing the potential of cellular television, and its implications for policymakers and regulators. Using models that consider the propagation of wireless signals and realistic demand distributions for video content, researchers are investigating the infrastructure required to efficiently support cellular TV, and the corresponding short and long-term engineering-economics of providing broadcast services with this new approach. They are looking at how these architectures could affect spectrum availability and performance of other wireless systems, such as broadband cellular systems and TV white space devices. Researchers will use data on actual user behavior derived through empirical observation of a cable TV system to develop and assess algorithms that allow even greater spectrum sharing and efficiency by considering the programs that users watch, and how these vary in popularity over time and space. Researchers are also examining a variety of laws and regulations that could affect or be affected by the emergence of cellular TV.