SBIR Phase II: A Unique, High Accuracy Means of Locating Cellular Telephones Using the Existing Cellular Infrastructure

Signatron的这个小企业创新研究第二阶段项目侧重于一种新的无线电定位技术，该技术可以降低公众确定拨打紧急电话的移动电话位置的成本。这项新技术涉及一项专有技术，用于在两个或多个基站收集呼叫电话信号参数，然后将其传输到中央计算机进行位置计算。在第一阶段，采用数学分析和计算机模拟来证明该技术的技术可行性。这项技术不仅被证明是可行的，而且被证明比现有技术更精确，成本也低一个数量级。在第二阶段，将把一个原型系统，包括与中央位置计算机相连的基站，并入一个商业移动电话系统，以进一步改进和评价实地业务中的技术。除了紧急移动电话定位（E911）的重要应用之外，这项新技术还将在其他基于位置的服务中有许多应用，而目前的地理定位技术要么效率低下，要么价格过高。这些服务包括基于位置的无线电话计费、定位欺诈性电话拨打者、车队管理、跟踪假释者、儿童定位、流浪阿尔茨海默病患者的定位、被盗车辆的定位、被盗设备（如笔记本电脑）的定位以及丢失宠物的定位。

This Small Business Innovative Research Phase II project from Signatron is focused on a novel radiolocation technology lowering the costs to the public of determining the location of cellular telephones which place emergency calls. The new technology involves a proprietary technique for collection of the calling phone signal parameters at two or more base stations which are then transmitted to a central computer for position computation. In Phase I, mathematical analysis and computer simulations were used to prove the technical feasibility of the technique. Not only was the technique shown to be feasible, but it was shown to be much more accurate and an order of magnitude less costly than the existing state of the art. In Phase II, a prototype system, comprising base stations linked to a central position location computer, will be integrated into a commercial cellular telephone system to further refine and evaluate the technology in field operation. Besides the important application to emergency cellular phone location (E911), this new technology will have a number of applications in other location based services for which current geolocation technologies are either ineffective or too expensive. Such services include location based billing for wireless telephones, locating fraudulent phone callers, vehicle fleet management, tracking of parolees, child location, location of wandering Alzheimer's disease patients, location of stolen vehicles, location of stolen equipment such as lap-top computers, and location of lost pets.