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    WIRELESS COMMUNICATION SYSTEM, APPARATUS AND METHOD
    12.
    发明专利
    WIRELESS COMMUNICATION SYSTEM, APPARATUS AND METHOD 未知

    公开(公告)号：AU2003240784A1

    公开(公告)日：2003-12-19

    申请号：AU2003240784

    申请日：2003-05-07

    Applicant: MOTOROLA INC

    Inventor： SERFATY SALOMON ,  GLAZER NIMROD ,  SHAHAF MARK

    IPC: H04L12/56 ,  H04W12/00 ,  H04W12/08 ,  H04W48/02 ,  H04Q7/38

    Abstract: A wireless communication system includes at least one wireless base station 122 having a processor 208 coupled to a transmitter, encrypting network identification data 330 for transmission to a remote, mobile communication unit 112. The unit 112 includes a receiver for receiving encrypted network identification data 340, from at least one of the base stations 122 and a processor 360 to decrypt the encrypted network identification data 340 in order to determine whether or not that the serving base station is a valid one. In this manner, fraudulent wireless base stations or fraudulent networks may be detected more readily.

    Generating handover cell parameter information to avoid need for scanning
    14.
    发明专利
    Generating handover cell parameter information to avoid need for scanning 未知

    公开(公告)号：GB2369957A

    公开(公告)日：2002-06-12

    申请号：GB0018371

    申请日：2000-07-27

    Applicant: MOTOROLA INC

    Inventor： EMBERSON GRANT MICHAEL ,  SHAHAF MARK ,  CARMON RAFAEL ,  GLAZER NIMROD

    IPC: H04W36/08 ,  H04W48/08 ,  H04Q7/38

    Abstract: A mobile station and its serving base transceiver station both have means to generate cell parameter information of a neighbouring cell to facilitate communication handover to the neighbouring cell, without the mobile station accessing or receiving information from the neighbouring cell providing said neighbouring cell parameter information. This avoids the need for background scanning of candidate neighbour cells by the mobile to determine the required synchronisation offset and operating parameters, such as the colour code (determines scrambling and frequency re-use pattern), maximum mobile transmit power or minimum receiver access level. Preferably in a shared Terrestrial Trunked Radio (TETRA) system only the colour code is required and the mobile and base station may use a linear feedback shift register (LFSR) to generate a pseudo-random sequence used to set the appropriate colour code. The generation may involve use of the neighbour cell id and location area (LA), periodically transmitted to the mobile by the serving base station. Facilitates seamless handover and reduces dropped calls or breaks in communications due to handovers.

    Allocating traffic channels in a TDMA system
    15.
    发明专利
    Allocating traffic channels in a TDMA system 未知

    公开(公告)号：GB2322043A

    公开(公告)日：1998-08-12

    申请号：GB9702493

    申请日：1997-02-07

    Applicant: MOTOROLA INC

    Inventor： AITKENHEAD GARY JOHN ,  CARMON RAFAEL ,  SHAHAF MARK ,  CHATER-LEA DAVID JOHN

    IPC: H04B7/26 ,  H04Q7/38

    Abstract: A TDMA communications system has a main carrier and at least one secondary carrier, each carrier having timeslots which may be used as traffic channels. The first timeslot of the main carrier is reserved for the main control channel whilst the other timeslots are, when traffic loading allows, reserved for synchronisation words (SYNC) and system information (SYSINFO), thereby enabling, for example, mobile phones to quickly synchronise with base stations. In an attempt to keep the main carrier timeslots free, channels are allocated to the carriers according to a predefined sequence, whereby an attempt is first made to put traffic onto the secondary carriers, the main carrier only being used if this attempt fails. Also mentions "freeing-up" the main carrier's traffic carrying timeslots, when timeslots become available on the secondary carriers, by reallocating them to the secondary carriers.

    Métodos, sistemas y terminales de comunicaciones
    16.
    发明专利
    Métodos, sistemas y terminales de comunicaciones 未知

    公开(公告)号：ES2429133T3

    公开(公告)日：2013-11-13

    申请号：ES02767632

    申请日：2002-09-11

    Applicant: MOTOROLA INC ,  MOTOROLA SOLUTIONS INC

    Inventor： CHATER-LEA DAVID J ,  SHAHAF MARK

    IPC: H04W12/02 ,  H04W12/00 ,  H04W12/04

    Abstract: Método para proporcionar comunicaciones de grupo seguras en un sistema (100) de comunicación entre unapluralidad de terminales (112, 114, 116) que emplean un protocolo de encriptación que usa una clave deencriptación compartida en cada uno de la pluralidad de terminales en el grupo, incluyendo el método modificar unaclave de encriptación compartida asociada con el grupo en un terminal (112) de transmisión para proporcionar unaclave de encriptación modificada e información de encriptación que va a transmitirse por el terminal de transmisiónusando la clave de encriptación modificada, en el que la clave de encriptación compartida se modifica combinando laclave de encriptación compartida con un identificador (520) que proporciona una identificación única del terminal detransmisión, caracterizado porque: (i) el identificador (520) es una dirección de control de acceso al medio (MAC) dada al terminal (112) de transmisión;y (ii) el identificador (520) se transmite en la señalización de control por el terminal (112) de transmisión mediantecomunicación inalámbrica a una pluralidad de terminales (114, 116) de recepción, y se extrae y se reconocemediante la pluralidad de terminales (114, 116) de recepción.

    19.
    发明专利
    未知

    公开(公告)号：DK1493040T3

    公开(公告)日：2007-03-12

    申请号：DK03708177

    申请日：2003-03-03

    Applicant: MOTOROLA INC ,  MOTOROLA LTD

    Inventor： SHAHAF MARK ,  HASSON BARUH ,  BAR-ON DAVID ,  SERFATY SALOMON

    IPC: G01S5/06 ,  G01S5/00 ,  G01S5/02 ,  H04W64/00

    Abstract: A method for use in a mobile communication system for estimating the location of a target mobile station (MS) which includes receiving signals from the target MS (N) at a plurality of receivers (MS 1 , MS 2 , MS 3 ) in different locations and calculating the location of the target MS (N) from information obtained from the received signals, wherein at least one of the receivers (MS 1 ) is a searching MS and wherein the calculation of location is carried out by the searching MS (MS 1 ). The method may involve the target MS and the searching MS or MSs communicating by a direct mode of operation (DMO) link. The searching MSs may conveniently have GPS attachments. A mobile station which may be used as the target MS or as a searching MS and a system incorporating the same is also disclosed.

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