公开(公告)号：DE60204626T2

公开(公告)日：2006-04-27

申请号：DE60204626

申请日：2002-04-02

Applicant: MOTOROLA INC

Inventor： JOHUR JASON ,  CARMON RAFY

IPC: H04W12/00

Abstract: A method to dynamically change an encryption key in a wireless communication system that employs an encryption protocol is described. The communication system includes a serving communication unit communicating with a plurality of remote communication units. The method comprises the steps of: communicating a message, from the serving communication unit to the plurality of remote communication units wherein the message includes an indication of a communication resource for the plurality of communication units to use and notifying the plurality of remote communication units of a change in an encryption key or encryption mode, within said message. This eliminates conditions of corrupted circuit mode speech or data as a result of a key change during a call, thereby minimising loss of service and disruption to the end-user(s). Furthermore, it provides a reliable mechanism to change the AI cipher key or encryption mode of a communications channel that is assigned for use in circuit mode speech or data.

公开(公告)号：ES2243615T3

公开(公告)日：2005-12-01

申请号：ES02007495

申请日：2002-04-02

Applicant: MOTOROLA INC

Inventor： JOHUR JASON ,  CARMON RAFY

IPC: H04W12/00 ,  H04Q7/38

Abstract: Un método para cambiar dinámicamente una clave de cifrado en un sistema de comunicación inalámbrico (100) usando protocolo de cifrado, sistema de comunicación (100) que incluye una unidad de comunicación de servicio (122-132) que comunica con una pluralidad de unidades de comunicación remotas (112-116), método que comprende las etapas de: comunicar un mensaje, desde la unidad de comunicación de servicio a la pluralidad de unidades de comunicación remotas (112-116, 320-324), donde el mensaje incluye una indicación de un canal de tráfico, con un marcador de usuario asignado para la pluralidad de unidades de comunicación remotas a usar; caracterizado, el método, por las etapas de: notificar (332) a la pluralidad de unidades de comunicación remotas (112-116, 320-324), de un cambio en una clave de cifrado o modo de cifrado, dentro del mencionado mensaje, donde las mencionadas unidades de comunicación son notificadas en el mencionado canal de tráfico (302); la mencionada etapa de notificación, incluye la etapa de: asignar un nuevo marcador de usuario, al mismo canal de tráfico para la llamada; y abandonar el canal de tráfico por parte de la unidad de comunicación, y volver a un canal de control principal, si la mencionada unidad de comunicación perdió la mencionada notificación, y determina que el nuevo marcador de usuario no se corresponde con el que la unidad de comunicación ha asignado al canal de tráfico.

公开(公告)号：AT298181T

公开(公告)日：2005-07-15

申请号：AT02007495

申请日：2002-04-02

Applicant: MOTOROLA INC

Inventor： JOHUR JASON ,  CARMON RAFY

IPC: H04W12/00 ,  H04Q7/38

Abstract: A method to dynamically change an encryption key in a wireless communication system that employs an encryption protocol is described. The communication system includes a serving communication unit communicating with a plurality of remote communication units. The method comprises the steps of: communicating a message, from the serving communication unit to the plurality of remote communication units wherein the message includes an indication of a communication resource for the plurality of communication units to use and notifying the plurality of remote communication units of a change in an encryption key or encryption mode, within said message. This eliminates conditions of corrupted circuit mode speech or data as a result of a key change during a call, thereby minimising loss of service and disruption to the end-user(s). Furthermore, it provides a reliable mechanism to change the AI cipher key or encryption mode of a communications channel that is assigned for use in circuit mode speech or data.

公开(公告)号：GB2368240B

公开(公告)日：2002-08-28

申请号：GB0025762

申请日：2000-10-20

Applicant: MOTOROLA INC

Inventor： SHAHAF MARK ,  SERFATY SALOMON ,  CARMON RAFY

IPC: H04W64/00 ,  H04Q7/38

公开(公告)号：GB2375005A

公开(公告)日：2002-10-30

申请号：GB0109909

申请日：2001-04-23

Applicant: MOTOROLA INC

Inventor： JOHUR JASON JONATHAN ,  CARMON RAFY

IPC: H04W12/00 ,  H04Q7/38

Abstract: A serving communication unit sends a message, to a plurality of remote communication units including an indication of a communication resource for the plurality of communication units to use and notifying a change in the encryption key or encryption mode, within said message. The method eliminates corruption of circuit mode speech or data as a result of a key change during a call, thereby minimising loss of service and disruption to the end-user(s). Furthermore, it provides a reliable mechanism to change the AI cipher key or encryption mode of a communications channel that is assigned for use in circuit mode speech or data.

公开(公告)号：GB2368240A

公开(公告)日：2002-04-24

申请号：GB0025762

申请日：2000-10-20

Applicant: MOTOROLA INC

Inventor： SHAHAF MARK ,  SERFATY SALOMON ,  CARMON RAFY

IPC: H04W64/00 ,  H04Q7/38

Abstract: A mobile uses TDOA measurements of standard signals of a predefined type, such as control bursts, from neighbouring base stations for location. The system protocols may be based on TETRA and the standard data from the Broadcast network channel (BNCH.) The neighbouring base stations may be determined from the handoff list provided by the serving station. A sample of BCNH signal may be stored and correlated in order to detect the incoming signal. The system may use a digital time matched filter and may request that neighbouring stations repeatedly transmit a measurable signal on all available channel time slots.

公开(公告)号：DK1253797T3

公开(公告)日：2005-10-10

申请号：DK02007495

申请日：2002-04-02

Applicant: MOTOROLA INC

Inventor： JOHUR JASON ,  CARMON RAFY

IPC: H04W12/00 ,  H04Q7/38

Abstract: A method to dynamically change an encryption key in a wireless communication system that employs an encryption protocol is described. The communication system includes a serving communication unit communicating with a plurality of remote communication units. The method comprises the steps of: communicating a message, from the serving communication unit to the plurality of remote communication units wherein the message includes an indication of a communication resource for the plurality of communication units to use and notifying the plurality of remote communication units of a change in an encryption key or encryption mode, within said message. This eliminates conditions of corrupted circuit mode speech or data as a result of a key change during a call, thereby minimising loss of service and disruption to the end-user(s). Furthermore, it provides a reliable mechanism to change the AI cipher key or encryption mode of a communications channel that is assigned for use in circuit mode speech or data.

公开(公告)号：GB2375005B

公开(公告)日：2003-07-09

申请号：GB0109909

申请日：2001-04-23

Applicant: MOTOROLA INC

Inventor： JOHUR JASON JONATHAN ,  CARMON RAFY

IPC: H04W12/00 ,  H04Q7/38

Abstract: A method to dynamically change an encryption key in a wireless communication system that employs an encryption protocol is described. The communication system includes a serving communication unit communicating with a plurality of remote communication units. The method comprises the steps of: communicating a message, from the serving communication unit to the plurality of remote communication units wherein the message includes an indication of a communication resource for the plurality of communication units to use and notifying the plurality of remote communication units of a change in an encryption key or encryption mode, within said message. This eliminates conditions of corrupted circuit mode speech or data as a result of a key change during a call, thereby minimising loss of service and disruption to the end-user(s). Furthermore, it provides a reliable mechanism to change the AI cipher key or encryption mode of a communications channel that is assigned for use in circuit mode speech or data.

公开(公告)号：GB2318481B

公开(公告)日：2001-05-09

申请号：GB9621557

申请日：1996-10-16

Applicant: MOTOROLA INC

Inventor： CARMON RAFY ,  SHAHAF MARK ,  RICHARDSON JULIAN HOWARD ,  AITKENHEAD GARY JOHN

IPC: H04B7/26

公开(公告)号：GB2318481A

公开(公告)日：1998-04-22

申请号：GB9621557

申请日：1996-10-16

Applicant: MOTOROLA INC

Inventor： CARMON RAFY ,  SHAHAF MARK ,  RICHARDSON JULIAN HOWARD ,  AITKENHEAD GARY

IPC: H04B7/26

Abstract: A method of allocating time slots for a communication at a first frequency between a first and a second unit in a communications system comprises the steps of: determining the existence of a current communication on a second frequency different to the first between a third and fourth unit in the communications system, and if there is a current communication, assigning different time slots for the communication between the first and second unit. This reduces the possibility of transmission by one unit operating in close proximity of another blocking reception of signals by the another unit.