Abstract:
A system, method and apparatus for providing location services whereby location determination and location disclosure are treated as separate and independent processes. Location determination may be performed (as necessary) via a first set of network entities to obtain location information for a mobile station. The location information may be cached for subsequent disclosure to any number of applications. Location disclosure may be performed (when requested) via a second set of network entities to provide the location information. Location determination may utilize a first security procedure for authorization and to obtain a first session key used for location determination. Location disclosure may utilize a second security procedure for authorization and to obtain a second session key used for location disclosure. For a roaming mobile station, location determination may be performed via a serving network and location disclosure may be performed via a home network.
Abstract:
A method of and system for detecting an interfering multi-path condition is provided. A parameter is determined from a pulse of a correlation function derived from a received signal. The parameter is examined to determine if it is inconsistent with a non-interfering multi-path hypothesis. If so, an interfering multi-path condition is detected.
Abstract:
A turbo code interleaver (100) using linear congruential sequences may be employed as a two-dimensional interleaver (16) in a turbo coder (10) that also includes first and second constituent encoders (12, 14). The interleaver (16) and the first encoder (12) are each configured to receive input bits. The first encoder (12) produces output symbols (22, 24) therefrom. The interleaver (16) receives the input bits (20) sequentially by row. A linear congruential sequence recursion algorithm within the interleaver (16) serves to pseudo-randomly rearrange, or shuffle, the bits within each row of the interleaver (16). The bits (26) are then output from the interleaver sequentially by column. The second encoder (14) is configured to receive the interleaved bits from the interleaver. The second encoder (14) produces output symbols (28) therefrom.; The two streams of output symbols (22, 24) are multiplexed together, with appropriate puncturing. If desired, the linear congruential recursion sequence can be generated in reverse. Also if desired, a bit reversal technique can be used in the interleaver (16) to rearrange, or shuffle, the rows of the interleaver (16).
Abstract:
A method of and system for detecting an interfering multi-path condition is provided. A parameter is determined from a pulse of a correlation function derived from a received signal. The parameter is examined to determine if it is inconsistent with a non-interfering multi-path hypothesis. If so, an interfering multi-path condition is detected.
Abstract:
Techniques to detect whether or not a remote terminal is under the coverage of a repeater within a wireless communication network, which may be based on (1) a list of base stations expected to be received while under the repeater's coverage, (2) the characterized environment of the repeater, and/or (3) the propagation delays for a transmission received at the remote terminal. Additional ambiguity resulting from being under a repeater's coverage may also be accounted for and/or compensated by (1) discarding time measurements from repeated base stations, (2) adjusting the processing for position estimation to account for the additional ambiguity due to the repeater, (3) computing a series of position estimates based on multiple transmissions received from the same originating base station and selecting the best estimate, and/or (4) computing a series of position estimates based on multiple transmissions from multiple originating base stations and selecting the best estimate.
Abstract:
Un procedimiento para determinar la información de ubicación sobre un segundo punto de acceso inalámbrico (703) de una red de área local inalámbrica, comprendiendo el procedimiento: recibir información de asistencia desde un servidor de ubicación (511) en una o más estaciones móviles (507) a través de uno o más primeros puntos de acceso inalámbrico (503, 505) de una red celular inalámbrica (501), en el que la información de asistencia del servidor de ubicación (511) se usa para calcular una pluralidad de ubicaciones (711, 713, 715, 721, 723, 725) de la una o más estaciones móviles (507) por la una o más estaciones móviles (507); recibir, por la una o más estaciones móviles (507), una o más señales inalámbricas desde el segundo punto de acceso inalámbrico (703) que indican una identidad del segundo punto de acceso inalámbrico (703); recopilar datos que especifican la pluralidad de ubicaciones (711, 713, 715, 721, 723, 725) en las que las señales inalámbricas transmitidas desde el segundo punto de acceso inalámbrico (703) son recibidas por la una o más estaciones móviles (507); y calcular la información de ubicación sobre el segundo punto de acceso inalámbrico (703) a partir de los datos recopilados y la pluralidad calculada de ubicaciones (711, 713, 715, 721, 723, 725) de la una o más estaciones móviles (507), en el que: la información de ubicación calculada comprende una posición estimada del segundo punto de acceso inalámbrico (703).
Abstract:
Un procedimiento (400) que comprende: proporcionar un dispositivo de comunicaciones (102) que tiene al menos una interfaz del sistema inalámbrico(306) y al menos un receptor de un sistema de posicionamiento por satélite (SPS) (304), en el que el receptorde SPS está adaptado para operar selectivamente en al menos una primera banda de frecuencias para recibiral menos una primera señal de SPS y una segunda banda de frecuencias para recibir al menos una segundaseñal SPS; y especificar selectivamente (404) que el receptor de SPS opera en una de dichas primera banda de frecuenciaso segunda banda de frecuencias, en base, al menos en parte a al menos una condición operativa asociada condicha interfaz del sistema inalámbrico.