METHOD AND APPARATUS FOR GPS ASSISTANCE IN A COMMUNICATION SYSTEM

    公开(公告)号:CA2362517A1

    公开(公告)日:2000-08-17

    申请号:CA2362517

    申请日:2000-02-14

    Applicant: QUALCOMM INC

    Abstract: A method and apparatus for efficiently transmitting location assistance information to a mobile communication device over a control channel with a minimal impact on the capacity of the control channel. A position location server provides a difference between satellite locations which have been computed using Almanac data and then Ephemeris data. Sending only the difference between the locations and clock corrections computed using the tw o different data types, the total amount of information to be transmitted to a mobile communication device is significantly reduced. Furthermore, by providing rate of change information, the method and apparatus allows the location assistance information to remain valid for a relatively long time after it has been received by the mobile communication device.

    TRANSMISSION OF SIGNALING INFORMATION FOR BROADCAST AND MULTICAST SERVICES

    公开(公告)号:CA2715189C

    公开(公告)日:2014-04-01

    申请号:CA2715189

    申请日:2005-02-10

    Applicant: QUALCOMM INC

    Abstract: Techniques for transmitting signaling information for broadcast and multicast services are described. A base station transmits signaling information for each service in accordance with a schedule that includes a repetition period and a modification period. The signaling information is sent in each repetition period to allow wireless devices to quickly obtain this information. Changes to the critical signaling information are permitted at the start of each modification period, which is an integer multiple of the repetition period. Whenever the critical signaling information for a given service is changed in a given modification period, a notification indicator for the service is set in an entire preceding modification period to inform the wireless devices of the impending change. The wireless devices can detect the notification indicator being set in the preceding modification period and can retrieve the updated critical signaling information in the following modification period.

    TRANSMISSION OF SIGNALING INFORMATION FOR BROADCAST AND MULTICAST SERVICES

    公开(公告)号:CA2715085C

    公开(公告)日:2012-10-23

    申请号:CA2715085

    申请日:2005-02-10

    Applicant: QUALCOMM INC

    Abstract: Techniques for transmitting signaling information for broadcast and multicast services are described. A base station transmits signaling information for each service in accordance with a schedule that includes a repetition period and a modification period. The signaling information is sent in each repetition period to allow wireless devices to quickly obtain this information. Changes to the critical signaling information are permitted at the start of each modification period, which is an integer multiple of the repetition period. Whenever the critical signaling information for a given service is changed in a given modification period, a notification indicator for the service is set in an entire preceding modification period to inform the wireless devices of the impending change. The wireless devices can detect the notification indicator being set in the preceding modification period and can retrieve the updated critical signaling information in the following modification period.

    Procedimiento y aparato para la asistencia al GPS en un sistema de comunicación

    公开(公告)号:ES2383945T3

    公开(公告)日:2012-06-27

    申请号:ES10004135

    申请日:2000-02-14

    Applicant: QUALCOMM INC

    Abstract: Un procedimiento para calcular la posición de un satélite (104) en un dispositivo (100) de comunicación móvil, que incluye las etapas de: recibir (300) datos de Almanaque y un Identificador de Almanaque en dicho dispositivo (100) de comunicación móvil; almacenar los datos de Almanaque y dicho identificador de Almanaque en una memoria de dicho dispositivo de comunicación móvil; recibir (318) en el dispositivo de comunicación móvil valores de diferencia para una diferencia entre una ubicación y una corrección del reloj del satélite calculadas en un servidor (106) usando datos de Almanaque y una ubicación y una corrección del reloj del satélite calculadas en el servidor usando datos de Efemérides, en el cual, junto con los valores de diferencia, se recibe un identificador en el dispositivo de comunicación móvil que identifica el Almanaque que fue usado por el servidor en los cálculos de los valores de diferencia; comparar (320) el identificador de Almanaque almacenado con el identificador recibido con los valores de diferencia y, si hay coincidencia, calcular (324) la ubicación del satélite (104) y calcular la corrección del reloj del satélite usando los datos de Almanaque almacenados; y aplicar los valores de diferencia recibidos a la ubicación del satélite y a la corrección del reloj del satélite, calculadas usando los datos de Almanaque almacenados.

    46.
    发明专利
    未知

    公开(公告)号:AT503307T

    公开(公告)日:2011-04-15

    申请号:AT07117442

    申请日:2002-11-12

    Applicant: QUALCOMM INC

    Abstract: Techniques for determining valid (i.e., supported) TFCs from among all configured TFCs for normal and compressed modes. These techniques maintain sufficient historical information such that 'TFC qualification' may be accurately performed. In a first scheme, Tx_power-requirement states are maintained for different combinations of each TFC. One combination is applicable for each TFC at each TFC interval, and valid TFCs are determined from applicable combinations in the proper state(s). In a second scheme, two Tx_power_requirement states are maintained for each TFC for the normal and compressed modes. In a third scheme, a single Tx_power_requirement state is maintained for each TFC for both modes based on a particular relative power requirement. In a fourth scheme, Tx_power_requirement states are maintained for a set of relative 'bins' that cover the total range of required transmit power for all TFCs. And in a fifth scheme, a set of relative power requirement thresholds are maintained.

    49.
    发明专利
    未知

    公开(公告)号:DE60034442T2

    公开(公告)日:2008-01-03

    申请号:DE60034442

    申请日:2000-03-28

    Applicant: QUALCOMM INC

    Abstract: An apparatus and method for locating a remote station in a synchronous communications network using the time of arrival of a reference pilot signal at the remote station as a time reference. The time difference of arrival (TDOA) of GPS signals received by the remote station and other signals received from a base station, are measured relative to this reference time. From these measurements, the location of the remote station is determined. The invention treats the location issue as a TDOA problem.

    50.
    发明专利
    未知

    公开(公告)号:AT376722T

    公开(公告)日:2007-11-15

    申请号:AT02780681

    申请日:2002-11-12

    Applicant: QUALCOMM INC

    Abstract: Techniques for determining valid (i.e., supported) TFCs from among all configured TFCs for normal and compressed modes. These techniques maintain sufficient historical information such that 'TFC qualification' may be accurately performed. In a first scheme, Tx_power-requirement states are maintained for different combinations of each TFC. One combination is applicable for each TFC at each TFC interval, and valid TFCs are determined from applicable combinations in the proper state(s). In a second scheme, two Tx_power_requirement states are maintained for each TFC for the normal and compressed modes. In a third scheme, a single Tx_power_requirement state is maintained for each TFC for both modes based on a particular relative power requirement. In a fourth scheme, Tx_power_requirement states are maintained for a set of relative 'bins' that cover the total range of required transmit power for all TFCs. And in a fifth scheme, a set of relative power requirement thresholds are maintained.

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