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1. 发明申请

WO2010044872A1 WIRELESS NETWORK-BASED LOCATION APPROXIMATION 审中-公开
标题翻译：基于无线网络的位置近似
公开(公告)号：WO2010044872A1
公开(公告)日：2010-04-22
申请号：PCT/US2009/005640
申请日：2009-10-14
申请人： GOOGLE INC. , YOUSSEF, Adel, Amin , MISHRA, Arunesh , LIANG, Sam , CHU, Michael , JAIN, Ravi
发明人： YOUSSEF, Adel, Amin , MISHRA, Arunesh , LIANG, Sam , CHU, Michael , JAIN, Ravi
IPC分类号： H04W24/00
CPC分类号： H04W64/00
摘要： The invention pertains to location approximation of devices, e.g ., access points ("APs") (102A, 102B, 102C) and client devices (104A, 104B, 104C) in a wireless network (100). Location estimates may be obtained by observation/analysis of packets (314) transmitted or received by APs. For instance, data rate information associated with a packet is used to approximate the distance between a device and the AP. This may be coupled with known positioning information to estimate an approximate location for the AP. Confidence information and metrics (404, 406, 408, 410) about whether a device is an AP and its location may also be determined. Accuracy of the location determination may be affected by factors including propagation and environmental factors, transmit power, antenna gain and diversity, etc. Location information database (112) of APs may employ measurements from various devices over time. Such information may identify locations of client devices and provide location-based services to them.
摘要翻译：本发明涉及无线网络（100）中的设备的位置近似，例如接入点（“AP”）（102A，102B，102C）和客户端设备（104A，104B，104C）。可以通过观察/分析由AP发送或接收的分组（314）来获得位置估计。例如，使用与分组相关联的数据速率信息来近似设备和AP之间的距离。这可以与已知的定位信息耦合以估计AP的大致位置。关于设备是否是AP及其位置的置信信息和度量（404,406,408,410）也可以被确定。位置确定的准确性可能受到包括传播和环境因素，发射功率，天线增益和分集等因素的影响.AP的位置信息数据库（112）可以随时间推移来自各种设备的测量。这样的信息可以识别客户端设备的位置并且向他们提供基于位置的服务。

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