NeTS: Small: Dynamic Spectrum Access for Mission Critical Wireless Networks

公共安全第一响应者需要更多地使用无线电频谱，以改善自然和人为紧急情况下各机构之间的互操作性，并适应带宽密集型应用，如关键任务视频监控。动态频谱接入是一种新的范例，它承诺改善射频频谱接入和效率，但由于缺乏对推动系统开发所需的频谱利用特征的详细了解，其在关键任务网络中的应用受到阻碍。该项目正在生成基本的长期和高分辨率频谱测量，以表征密集城市环境(芝加哥)中任务关键型无线网络的时间、频率、能量和空间动态。从这些测量中创建了表征公共安全频谱利用的经验和分析模型。经验模型和分析模型依次用作候选关键任务动态频谱接入方法的离散事件模拟的输入，以评估这些方法提高容量的能力，同时保持通过接入延迟和干扰容限衡量的必要性能。射频测量结果、关键任务频谱利用的经验和分析模型以及系统模型正通过连接到伊利诺伊理工学院网站的安全下载服务器传播。这项研究将通过评估应用于关键任务公共安全无线网络和促进系统开发的可行性，影响公共安全利益相关者，包括政府机构、公共安全标准机构、联邦通信委员会和设备供应商。

Public safety first responders have a need for increased access to radio spectrum to improve interoperability between agencies in natural and human-caused emergencies, and to accommodate bandwidth intensive applications such as mission critical video surveillance. Dynamic Spectrum Access, a new paradigm that promises improved RF spectrum access and efficiency, has been hindered in its application to mission critical networks by a lack of the detailed understanding of the spectrum utilization characteristics necessary to drive system development. This project is generating the fundamental long-term and high-resolution spectrum measurements needed to characterize the time, frequency, energy, and spatial dynamics of mission critical wireless networks in a dense urban environment (Chicago). Empirical and analytical models that characterize public safety spectrum utilization are being created from these measurements. The empirical and analytical models are being used in turn as inputs to discrete-event simulations of candidate mission critical Dynamic Spectrum Access approaches in order to assess the ability of these approaches to improve capacity, while maintaining the necessary performance as measured by access delay and interference tolerance. Results in the form of the RF measurements, empirical and analytical models of mission critical spectral utilization, and system models are being disseminated via a secure download server linked to the Illinois Institute of Technology website. This research will impact Public Safety stakeholders including government agencies, public safety standards bodies, the Federal Communications Commission, and equipment providers by assessing the feasibility of applying to mission critical public safety wireless networks and facilitating system development.