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    METHOD AND APPARATUS FOR RELIABLE INTERSYSTEM HANDOFF IN A CDMA SYSTEM
    75.
    发明专利
    METHOD AND APPARATUS FOR RELIABLE INTERSYSTEM HANDOFF IN A CDMA SYSTEM 未知

    公开(公告)号：CA2262926C

    公开(公告)日：2008-12-23

    申请号：CA2262926

    申请日：1997-08-06

    Applicant: QUALCOMM INC

    Inventor： PADOVANI ROBERTO

    IPC: H04W36/14 ,  H04W36/18

    Abstract: In a communications network, a network user communicates through a remote un it (155) via at least one base station (150). The communications network includes a first mobile switching center (100) for controlling communications through a first set of base stations (102) and a second mobile switching center (112) for controlling communications through a second set of base stations (108). The network also includes a service providing base station (102D) controlled by the firs t mobile switching center (100) and providing service to a first transition coverage area using a first pseudorandom noise code. The first transition coverage area defines a boundary between a first system (102) controlled by the first mobile switching center (100) and a second system (108) controlled by the second mobile switching center (112). The network further includes a passage providing base station controlled (108D) by the second mobile switching center (112) for providing service to the first transition area using a second pseudorand om noise code offset in time by a first amount from the first pseudorandom noise code. The passage providing base station provides service to a remote unit (155) only if the remote unit (155) is entering the first transition coverage area while exiting the second system or is about to exit the first transition coverage area while entering the second system.

    76.
    发明专利
    未知

    公开(公告)号：FI119539B

    公开(公告)日：2008-12-15

    申请号：FI19992212

    申请日：1999-10-13

    Applicant: QUALCOMM INC

    Inventor： BENDER PAUL E ,  PADOVANI ROBERTO

    IPC: H04B1/04 ,  H04B7/26 ,  H04B7/005 ,  H04L1/00 ,  H04W36/08 ,  H04W36/18 ,  H04W36/30 ,  H04W52/00 ,  H04W52/24 ,  H04W52/40 ,  H04W52/44 ,  H04W52/58 ,  H04W52/60 ,  H04W56/00 ,  H04W68/00

    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.

    PROCEDIMIENTO Y APARATO PARA TRASPADO DISCONTINUO EN UN SISTEMA CDMA.
    79.
    发明专利
    PROCEDIMIENTO Y APARATO PARA TRASPADO DISCONTINUO EN UN SISTEMA CDMA. 未知

    公开(公告)号：ES2299185T3

    公开(公告)日：2008-05-16

    申请号：ES97929732

    申请日：1997-05-23

    Applicant: QUALCOMM INC

    Inventor： WEAVER LINDSAY A JR ,  MUNSINGER DAVID B ,  PADOVANI ROBERTO ,  ZIV NOAM A ,  KARMI GADI ,  GILHOUSEN KLEIN S

    IPC: H04W24/02 ,  H04W36/14

    Abstract: Un procedimiento para dirigir las comunicaciones entre una unidad (18, 155) remota y una primera estación (150, 200, B1, B1A, B1C a B1E, T1 a T3) base en una red de comunicaciones en la que un usuario (30) de red se comunica a través de la unidad (18, 155) remota con otro usuario a través de al menos una estación base, incluyendo dicha red de comunicaciones un primer centro (212, MSC-I) de conmutación móvil para controlar las comunicaciones a través de un primer conjunto de estaciones base que incluye la primera estación (150, 200, B1, B1A, B1C a B1E, T1 a T3) base que presenta características similares que permiten traspaso continuo intrasistema entre las mismas, y medios para designar una estación base como una estación base de límite en una ubicación que limita con un segundo conjunto de estaciones base que tiene características diferentes a las características del primer conjunto de estaciones base para hacer más complicado el traspaso continuo intersistema entre el primer y el segundo conjunto, comprendiendo el procedimiento: almacenar en dicha unidad (18, 155) remota una lista de estaciones base activas que comprende una entrada correspondiente a cada estación base con la que se establece comunicación activa y en la que dicha primera estación (150, 200, B1, B1A, B1C a B1E, T1 a T3) base presenta una entrada en dicha lista de estaciones base activas; y medir, en dicha primera estación (150, 200, B1, B1A, B1C a B1E, T1 a T3) base, un retardo de ida y vuelta de una primera señal de comunicación activa entre dicha primera estación (150, 200, B1, B1A, B1C a B1E, T1 a T3) base y dicha unidad (18, 155) remota, caracterizado por: iniciar un traspaso de dicha primera señal de comunicación activa a una de dicho segundo conjunto de estaciones base si dicho retardo de ida y vuelta de dicha primera comunicación activa supera un umbral y si dicha primera estación (150, 200, B1, B1A, B1C a B1E, T1 a T3) base está designada como una estación base de límite.

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