Sistemas y procedimientos para la gestión de claves para sistemas de comunicación inalámbrica

    公开(公告)号:ES2671170T3

    公开(公告)日:2018-06-05

    申请号:ES07841355

    申请日:2007-08-24

    Applicant: QUALCOMM INC

    Abstract: Un procedimiento de traspaso seguro, que comprende: un terminal de acceso que se comunica de forma segura con un primer punto de acceso utilizando una primera clave de sesión transitoria, en el que la primera clave de sesión transitoria se genera basándose en una primera clave maestra provisional y en la que la primera clave maestra provisional se genera basada en una clave maestra de nivel superior y un primer número de secuencia asociado con el primer punto de acceso; el terminal de acceso que asocia un segundo número de secuencia con un segundo punto de acceso; el terminal de acceso que inicia un traspaso seguro desde el primer punto de acceso al segundo punto de acceso, en el que el segundo número de secuencia se reenvía al primer punto de acceso; el terminal de acceso que genera una segunda clave maestra provisional basada en la primera clave maestra provisional y el segundo número de secuencia; el terminal de acceso que genera una segunda clave de sesión transitoria basada en la segunda clave maestra provisional; y el terminal de acceso que se comunica de forma segura con el segundo punto de acceso usando la segunda clave de sesión transitoria.

    PROTOCOLOS DE RADIOENLACE PARA SISTEMAS DE COMUNICACIONES MULTIENLACE.

    公开(公告)号:ES2368342T3

    公开(公告)日:2011-11-16

    申请号:ES06735453

    申请日:2006-02-16

    Applicant: QUALCOMM INC

    Abstract: Un procedimiento (1200) para la transmisión de datos en un sistema de comunicaciones multienlace (100) que comprende: la segmentación (1210) de un paquete de nivel superior en paquetes de nivel de enlace que van a ser transmitidos sobre una pluralidad de enlaces de comunicación; la adición de un primer número de secuencia (1220) a cada paquete de nivel de enlace; y la adición de un segundo número de secuencia (1230) a cada paquete de nivel de enlace que debe ser transmitido una primera vez, estando el segundo número de secuencia en un espacio de secuencia asociado con un enlace de comunicación concreto; y la recepción de un mensaje de confirmación negativa (NAK) desde un receptor, incluyendo el mensaje de NAK una primera laguna del primer número de secuencia indicada por los primeros números de secuencia de dos paquetes de nivel de enlace recibidos de forma consecutiva que presentan unos segundos números de secuencia no contiguos.

    3.
    发明专利
    未知

    公开(公告)号:AT485637T

    公开(公告)日:2010-11-15

    申请号:AT01973142

    申请日:2001-09-12

    Applicant: QUALCOMM INC

    Inventor: BENDER PAUL

    Abstract: In a wireless communication system a method for high data rate transmission aggregates information signals processed by at least two modems, wherein the modulated information signals are transmitted using two carrier frequencies. The method provides multiple data transmissions concurrently over a broad bandwidth consistent with single transmission air-interface standards. An apparatus, mobile unit, includes a multi-link (ML) protocol processor that aggregates the information signals from the modems into a point-to-point protocol (PPP) format for interface with conventional data-based systems, such as the internet. The ML processor further receives an aggregated bundle and separates the bundle into its constituent parts for modulation by the modems.

    4.
    发明专利
    未知

    公开(公告)号:BR0208310A

    公开(公告)日:2004-08-24

    申请号:BR0208310

    申请日:2002-03-22

    Applicant: QUALCOMM INC

    Abstract: A "time multiplexed" transmission scheme capable of reducing the amount of interference from other cells operated at the same frequency band. Each cell in a system transmits in designated time intervals (e.g., time slots) during which other interfering cells may be prevented from transmitting. By temporarily "blanking" transmissions from interfering cells during the designated time slots, the amount of interference from these cells is reduced. The improved signal quality may support transmission at a desired or higher data rate, which may not be possible without cell blanking. In one variant, transmissions from the cells are staggered over different time slots. A set of one or more cells may be designated to transmit in each of a number of slot phases. The cells transmit in a staggered manner on these phases to reduce interference. The transmission scheme may be used for a various channel types (e.g., a control channel) and applications.

    Time multiplexed transmission scheme for a spread spectrum communication system

    公开(公告)号:AU2002252448A1

    公开(公告)日:2002-10-08

    申请号:AU2002252448

    申请日:2002-03-22

    Applicant: QUALCOMM INC

    Abstract: A "time multiplexed" transmission scheme capable of reducing the amount of interference from other cells operated at the same frequency band. Each cell in a system transmits in designated time intervals (e.g., time slots) during which other interfering cells may be prevented from transmitting. By temporarily "blanking" transmissions from interfering cells during the designated time slots, the amount of interference from these cells is reduced. The improved signal quality may support transmission at a desired or higher data rate, which may not be possible without cell blanking. In one variant, transmissions from the cells are staggered over different time slots. A set of one or more cells may be designated to transmit in each of a number of slot phases. The cells transmit in a staggered manner on these phases to reduce interference. The transmission scheme may be used for a various channel types (e.g., a control channel) and applications.

    8.
    发明专利
    未知

    公开(公告)号:AT472861T

    公开(公告)日:2010-07-15

    申请号:AT06022638

    申请日:1999-02-19

    Applicant: QUALCOMM INC

    Abstract: A system and method is taught for controlling the power level of transmissions within a communication system having a base station, a mobile station, a communication channel, and a pilot channel. The mobile station determines a signal strength value according to a communication signal received by way of the communication channel. A pilot channel signal is determined according to a pilot signal transmitted by way of the pilot channel. The signal to noise ratio of the communication signal is determined according to the determined signal strength value and the pilot channel signal. The power level of a transmission is controlled according to the signal to noise ratio. The noise level in a communication channel within the communication system is estimated. The pilot channel signal includes pilot energy and pilot noise components. The pilot energy component is removed to provide a remaining pilot signal. Communication system operations are controlled according to the remaining pilot signal. The power levels of transmissions are controlled by determining the signal to noise ratio of a signal within the communication channel and determining a difference signal. The difference signal is formed by determining the difference between determined and desired signal to noise ratios. The difference signal is transmitted between the base station and the mobile station. The pilot channel has at least one frame and the power control signal is inserted into the frame. Thus, information representing the strength of the communication signal is transmitted to the base by way of the pilot channel within the frame. The pilot channel can have two information frames for transmitting the power control signal a plurality of times.

    9.
    发明专利
    未知

    公开(公告)号:AT468721T

    公开(公告)日:2010-06-15

    申请号:AT02786951

    申请日:2002-12-05

    Applicant: QUALCOMM INC

    Abstract: Techniques to test performance of terminals and access points in CDMA data (e.g., cdma2000) systems: are based on a framework of protocols and messages provided to support systematic performance testing of terminals and to ensure interface compatibility. The framework comprises a Forward Test Application Protocol (FTAP) for testing forward channels and a Reverse Test Application Protocol (RTAP) for testing reverse channels. Specific methods are defined to test different types of channels (e.g., traffic channels as well as auxiliary channels), on the basis of data transmissions of test packets formed and transmitted according to test settings included in a message previously received.

    10.
    发明专利
    未知

    公开(公告)号:AT421811T

    公开(公告)日:2009-02-15

    申请号:AT01935213

    申请日:2001-05-08

    Applicant: QUALCOMM INC

    Abstract: A novel method and apparatus for providing both voice services and data services in a High Data Rate (HDR) wireless communication system. At least one sub-channel is formed on the forward link of the HDR system. The at least one sub-channel comprise at least one time slot that occupies a specified position in a frame of the forward link. The at least one sub-channel is assigned for voice services. The voice services at the at least one sub-channel are provided in accordance with a CDMA principles. Such principles are disclosed e.g., in IS-95, cdma2000, or other standards known to one skilled in the art. The remaining time slots are used for data services. In another aspect of the invention, additional sub-channels are formed, utilizing all remaining time slots. The additional sub-channels are assigned to data services, such that each sub-channel carries data to a different user. The number of sub-channels assigned to voice services, and the number of sub-channels assigned to voice services changes with varying needs for voice services and data services.

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