无线通信中的定时信息和最佳位置验证框架

Shihao Yan, R. Malaney, Ido Nevat, G. Peters
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引用次数: 6

摘要

无线网络中位置信息的验证是一个相对较新的研究领域,但其重要性日益增加。在这项工作中,我们探讨了物理层时间信息是主要观测输入的最优位置验证系统的两个正式理论框架。在我们的第一个框架中,我们使用系统输入/输出互信息作为优化度量,推导出最优决策规则。在第二个框架中,采用更传统的贝叶斯方法,将误分类误差作为决策规则的优化度量。给出了到达时间(ToA)信息与更容易确定的接收信号强度(RSS)信息之间的验证性能比较。我们的主要发现是,对于下一代无线网络中可实现的ToA精度,相对于当前基于rss的技术,可以预期位置验证的显着改进。我们的研究结果对广泛的新兴无线网络和服务具有重要意义,尤其是对新兴的智能交通系统(ITS),其中位置信息的认证对系统用户的安全和保障至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Timing information in wireless communications and optimal location verification frameworks
The verification of location information in wireless networks is a relatively new area of research, but one of growing importance. In this work we explore two formal theoretical frameworks for an optimal location verification system in which physical-layer timing information is the main observational input. In our first framework, we derive an optimal decision-rule using the system input/output mutual information as the optimization metric. In the second framework, a more traditional Bayesian approach is adopted in which the misclassification error is used as the decision-rule's optimization metric. A verification-performance comparison between time-of-arrival (ToA) information and the more easily determined received signal strength (RSS) information is given. Our key finding is that for ToA accuracies attainable in next generation wireless networks, significant improvement in location verification can be expected relative to current RSS-based techniques. Our results are important for a wide range of emerging wireless networks and services, but especially for emerging Intelligent Transport Systems (ITS), where the authentication of location information is of critical importance to the safety and security of system users.
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