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Capacity Considerations for Secondary Networks in TV White Space

机译:电视空白空间中辅助网络的容量注意事项

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The so-called “TV white spaces” (TVWS)—representing unused TV channels in any given location as the result of the transition to digital broadcasting—is designated for unlicensed use , , by the US Federal Communications Commission (FCC). This presents significant new opportunities within the context of emerging 4G networks for developing new wireless access technologies that meet the goals of the US National Broadband Plan (notably true broadband access for an increasing fraction of the population). There are multiple challenges in realizing this goal; the most fundamental being the fact that the available WS capacity is currently not accurately known, since it depends on a multiplicity of factors—including system parameters of existing incumbents (broadcasters), propagation characteristics of local terrain as well as FCC rules. In this paper, we explore the capacity of white space networks by developing a detailed model that includes all the major variables, and is cognizant of FCC regulations that provide constraints on incumbent protection. Real terrain information and propagation models for the primary broadcaster and adjacent channel interference from TV transmitters are included to estimate their impact on achievable WS capacity. The model is later used to explore various trade-offs between network capacity and system parameters and suggests possible amendments to FCC’s incumbent protection rules in the favor of furthering white space capacity.
机译:所谓的“电视空白区”(TVWS),是指转换为数字广播后在任何给定位置上未使用的电视频道,由美国联邦通信委员会(FCC)指定为未经许可的使用。在新兴的4G网络背景下,这为开发满足美国国家宽带计划(尤其是越来越多的人口的真正宽带接入)目标的新型无线接入技术提供了巨大的新机遇。实现这一目标有许多挑战。最根本的事实是,目前尚无法准确知道可用的WS容量,因为它取决于多种因素,包括现有运营商(广播公司)的系统参数,本地地形的传播特性以及FCC规则。在本文中,我们通过开发包含所有主要变量的详细模型来探索空白网络的容量,并且该模型认识到FCC法规对现有保护提供了限制。包括主要广播公司的实际地形信息和传播模型以及电视发射机的相邻频道干扰,以评估其对可达到的WS容量的影响。该模型随后用于探索网络容量和系统参数之间的各种折衷,并建议可能的对FCC现有保护规则的修正,以促进空白空间的容量。

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