发明名称 Methods and apparatus for determining mobile device location in a communications system
摘要 Methods and apparatus related to determining location of one or more mobile devices based on signals received by mobile device and signals received by fixed devices such as access points (APs) in a communications system are described. In accordance with various embodiments, mobile devices, e.g., peer devices, measure one or more signal characteristics, e.g., received signal power level, of signals received from peer devices and report this information along with information identifying the peer devices to which individual signal measurements correspond. The time of the signal measurements is also reported allowing a location determination server to time align signal measurements made by multiple different devices, e.g., mobile devices and access points, and use signals measurements from the multiple devices to determine the location of one or mobile devices, e.g., at one or more points in time, with more accuracy than if AP signal measurement alone were used.
申请公布号 US8744487(B2) 申请公布日期 2014.06.03
申请号 US201113008965 申请日期 2011.01.19
申请人 QUALCOMM Incorporated 发明人 Jovicic Aleksandar;Measson Cyril;Richardson Thomas
分类号 H04W24/00 主分类号 H04W24/00
代理机构 代理人
主权项 1. A method of operating a mobile communications device, the method comprising: receiving a signal transmitted by at least one other device; measuring at least one radio frequency characteristic of the received signal; storing signal measurement information in combination with a peer device identifier identifying a device to which the signal measurement information being stored corresponds; and transmitting the stored signal measurement information and the corresponding peer device identifier when a transmission constraint is satisfied, further comprising: determining if the transmission constraint is satisfied prior to transmitting the stored signal measurement, said determining including determining that one or more access points with a communications link to the mobile communications device having a signal to noise ratio above a threshold are available; and wherein said transmitting includes: transmitting the stored signal measurement information and the corresponding peer device identifier to an access point with a communications link with said mobile communications device having a highest signal to noise ratio.
地址 San Diego CA US