Abstract:
Techniques to estimate the position of a wireless terminal. In a method, the identities of a number of transmitters (e.g., BTSs) to be used to estimate the position are initially received. Expected areas for these transmitters are then determined. The expected area associated with each transmitter is indicative of an area where the terminal is likely to be located given that the signal from the transmitter is received by the terminal. Each expected area may comprise a location (e.g., the expected area center) to be used as an estimated position of the terminal and an uncertainty (or error estimate) associated with that estimated position. The expected areas for the transmitters are then combined (e.g., based on a weighted average) to determine a combined expected area, which is then provided as the estimate of the position of the terminal.
Abstract:
In a wireless communication network, base station antenna positions and time offsets are stored in a base station almanac data base along with other information used for obtaining the most reliable mobile station position fixes under a variety of conditions. The system uses the position fixes of mobile stations and terrestrial ranging information to determine base station antenna positions and base station timing offsets. The base station antenna positions are determined during normal mobile station position determinations, in order to maintain and improve the antenna location data, and to correct for change or relocation of the base station antennas. It is possible to recover quickly from a loss of cell sector identity during relocation of a base station antenna, and to ensure accuracy of mobile station position determination based on ranging from the base stations, and rapid acquisition of position data from mobile stations having global satellite receivers.
Abstract:
Methods and apparatuses for the processing of false alarms in position determination. At least one embodiment of the present invention estimates and uses measurement false alarm probabilities in the position determination process. In one embodiment, the estimated measurement false alarm probabilities are combined to determine the reliability of the determined position solution or the reliability of the set of measurements as a collection. In one embodiment, the estimated measurement false alarm probabilities are used in the isolation and elimination of faulty measurements. For example, the traditional geometry based metric for identifying a faulty measurement is further weighted according to the measurement false alarm probabilities in order to determine the faulty measurement.
Abstract:
Methods and apparatuses for position determination and other operations. In one embodiment of the present invention, a mobile station uses wireless signals from a plurality of wireless networks (e.g., with different air interfaces and/or operated by different service providers) for position determination (e.g., for data communication, for obtaining time and/or frequency information, for range measurement, for sector or altitude estimation). In one embodiment of the present invention, mobile stations are used to harvest statistical data about wireless access points (e.g., the locations of mobile stations that have received signals from the wireless access points, such as from cellular base stations, wireless local area network access points, repeaters for positioning signals, or other wireless communication transmitters) and to derive location information (e.g., position and coverage area of the wireless access points) for the wireless networks from the collected statistical data.
Abstract:
Un procedimiento para determinar la posición de una estación base (11 - 15) en una red de comunicación inalámbrica, comprendiendo el procedimiento: (a) determinar (81 - 94) las posiciones de al menos una estación móvil (22 - 23) en comunicación con la estación base (11 - 15), en el que cada una de la al menos una estación móvil tiene un receptor de satélite de posicionamiento global, y las posiciones de la al menos una estación móvil se determinan a partir de las señales recibidas por la al menos una estación móvil desde satélites de posicionamiento global (17 - 21); (b) determinar (101 - 108, 111, 112, 121 - 125) la posición de la estación base a partir de las posiciones determinadas de la estación(es) móvil(es) y de las señales transmitidas entre la estación base y la estación(es) móvil(es); y (c) utilizar la posición determinada de la estación base para mantener información de localización de la estación base en una base de datos del almanaque de estaciones base.
Abstract:
Un procedimiento para determinar una posición de una estación móvil, comprendiendo el procedimiento: recibir (901), en la estación móvil, las primeras señales transmitidas desde un primer punto de acceso inalámbrico de una primera red inalámbrica de un primer tipo de red, prestando soporte, el primer punto de acceso inalámbrico, a la comunicación bidireccional, en el que: la primera red inalámbrica es una red de área local inalámbrica; y las primeras señales comprenden información de identificación para el primer punto de acceso inalámbrico; determinar (903), por parte del dispositivo móvil, una medición de distancia para la estación móvil, usando las primeras señales; y comunicar (905) segundas señales entre la estación móvil y un segundo punto de acceso inalámbrico de una segunda red inalámbrica de un segundo tipo de red, en el que el segundo tipo de red es diferente al primer tipo de red; y comunicar (907) entre la estación móvil y un servidor, para determinar la posición de la estación móvil, a través del segundo punto de acceso inalámbrico de la segunda red inalámbrica, en el que: la comunicación entre la estación móvil y el servidor comprende transmitir la información de identificación para el primer punto de acceso inalámbrico desde la estación móvil al servidor, y la recepción por la estación móvil de una ubicación del primer punto de acceso inalámbrico desde el servidor, en base a la información de identificación; y la posición de la estación móvil es determinada por la estación móvil en base, al menos en parte, a la medición de distancia y a la ubicación del primer punto de acceso inalámbrico.
Abstract:
"determinação da posição baseada em área para terminais em uma rede sem fio". trata-se de técnicas para estimar a posição de um terminal sem fio. em um método, as identidades de vários transmissores (como, por exemplo, btss) serem utilizados para estimar a posição são recebidas inicialmente. são então determinadas as áreas esperadas para estes transmissores. a área esperada associada a cada transmissor indica uma área onde é provável que o terminal esteja localizado, supondo-se que o sinal do transmissor seja recebido pelo terminal. cada área esperada pode compreender uma localização (como, por exemplo, o centro da área esperada) a ser utilizada como a posição estimada do terminal e uma incerteza (ou estimativa de erro) associada a essa posição estimada. as áreas esperadas para os transmissores são então combinadas (com base em uma média ponderada, por exemplo) de modo a se determinar uma área esperada combinada, que é então apresentada como a estimativa de posição do terminal.
Abstract:
Techniques to estimate the position of a wireless terminal. In a method, the identities of a number of transmitters (e.g., BTSs) to be used to estimate the position are initially received. Expected areas for these transmitters are then determined. The expected area associated with each transmitter is indicative of an area where the terminal is likely to be located given that the signal from the transmitter is received by the terminal. Each expected area may comprise a location (e.g., the expected area center) to be used as an estimated position of the terminal and an uncertainty (or error estimate) associated with that estimated position. The expected areas for the transmitters are then combined (e.g., based on a weighted average) to determine a combined expected area, which is then provided as the estimate of the position of the terminal.