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    Generating handover cell parameter information to avoid need for scanning
    3.
    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.

    SISTEMA DE COMUNICACION, UNIDAD DE RADIO Y METODO PARA LLEVAR A CABO UN TRASPASO.
    4.
    发明专利
    SISTEMA DE COMUNICACION, UNIDAD DE RADIO Y METODO PARA LLEVAR A CABO UN TRASPASO. 未知

    公开(公告)号：ES2272542T3

    公开(公告)日：2007-05-01

    申请号：ES01971779

    申请日：2001-07-24

    Applicant: MOTOROLA INC

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

    IPC: H04W36/08 ,  H04W48/08

    Abstract: Un sistema de comunicación basado en celdas (10, 58), que incluye una pluralidad de estaciones móviles (88-92), y una pluralidad de estaciones base transmisoras receptoras (74-86) que sirven, cada una, a estaciones móviles dentro de una celda definida (60, 62), incluyendo el sistema (10, 58) por lo menos una estación base transmisora receptora (74), operativa para enviar a sus estaciones móviles servidas, un mensaje de difusión que proporciona información sobre las estaciones base transmisoras receptoras, vecinas, y por lo menos una estación móvil (88), operativa para recibir tal mensaje de difusión, y para utilizar la información incluida en el mensaje de difusión, caracterizado porque el sistema funciona de acuerdo con procedimientos estándar TETRA, y el mensaje de difusión incluye un código de color de, al menos, otra estación base transmisora receptora (76) que da servicio a estaciones móviles en una celda vecina, siendo el código de color una dirección de identificación, que determinaun patrón de mezcla específico de celda, utilizado por la otra estación base transmisora receptora (76), para mezclar las transmisiones mediante tal estación base transmisora receptora, y de uso necesario para las estaciones móviles, al efecto de conocer el patrón de mezcla para deshacer la mezcla de tales transmisiones, estando el código de color incluido, en forma codificada, en el mensaje de difusión y siendo la estación móvil (88), operativa para descodificar el mensaje de difusión recibido, y obtener el código de color.

    Varying period between control signalling opportunities
    5.
    发明专利
    Varying period between control signalling opportunities 未知

    公开(公告)号：GB2364219A

    公开(公告)日：2002-01-16

    申请号：GB0012715

    申请日：2000-05-24

    Applicant: MOTOROLA INC

    Inventor： EMBERSON GRANT MICHAEL ,  JOHUR JASON JONATHAN

    IPC: H04L12/43 ,  H04Q11/04 ,  H04W36/00 ,  H04L29/06

    Abstract: A method of varying the time between control signalling opportunities in time division multiple access (TDMA) systems which utilise a control frame on a traffic channel for control signalling. This invention provides a method for, and system conFigured to, vary the time between control signalling opportunities. This provides the advantage that a receiving MS in a call no longer necessarily has to await the occurrence of the next dedicated control frame/control signalling opportunity in order to transmit control signalling to the infrastructure of a system in which it is situated.

    Mobile station, infrastructure processor, system and method for use in cellular communications
    8.
    发明专利
    Mobile station, infrastructure processor, system and method for use in cellular communications 未知

    公开(公告)号：GB2421872B

    公开(公告)日：2007-06-13

    申请号：GB0428259

    申请日：2004-12-29

    Applicant: MOTOROLA INC

    Inventor： YOUNG MALCOLM J ,  EMBERSON GRANT MICHAEL

    IPC: H04W4/06 ,  H04W36/08 ,  H04W36/32

    Abstract: A mobile station for use in a cellular communication system includes a transceiver and a processor operable to apply a cell re-selection procedure which includes determining whether the mobile station should change its serving base station, wherein the transceiver is operable to receive via its serving base station a signal from an infrastructure processor advising or instructing the mobile station to select a particular base station in its cell re-selection procedure, and the processor of the mobile station is operable to apply a cell re-selection procedure to determine whether the mobile station should change its serving base station to the particular selected base station, wherein the particular selected base station has been selected and specified by the infrastructure processor based upon the location of members of a group of mobile stations with which the mobile station is to communicate.

    Method of Cell Reselection in a Cellular Communications System.
    9.
    发明专利
    Method of Cell Reselection in a Cellular Communications System. 未知

    公开(公告)号：GB2421872A

    公开(公告)日：2006-07-05

    申请号：GB0428259

    申请日：2004-12-29

    Applicant: MOTOROLA INC

    Inventor： YOUNG MALCOLM J ,  EMBERSON GRANT MICHAEL

    IPC: H04W4/06 ,  H04W36/08 ,  H04W36/32

    Abstract: A mobile station (112) for use in a cellular communication system (100) includes a transceiver (transmitter and receiver) and a processor (214) operable to apply a cell re-selection procedure which includes determining whether the mobile station should change its serving base station, wherein the transceiver is operable to receive via its serving base station (122) a signal from an infrastructure processor (402) advising or instructing the mobile station to select a particular base station (126) in its cell re-selection procedure, and the processor of the mobile station is operable to apply a cell re-selection procedure to determine whether the mobile station should change its serving base station to the particular selected base station, wherein the particular selected base station has been selected and specified by the infrastructure processor based upon the location of members of a group of mobile stations with which the mobile station is to communicate with the objective of minimising the number of base stations or cells to which meters of the group are attached. Also described is an infrastructure processor (402) which assists or directs the mobile station in the cell re-selection procedure as well as a communication system (100) and method in which the mobile station and the infrastructure processor operate.

    Communication channel release after period of non-use (hang time) where period (hang time) is variable
    10.
    发明专利
    Communication channel release after period of non-use (hang time) where period (hang time) is variable 未知

    公开(公告)号：GB2420252A

    公开(公告)日：2006-05-17

    申请号：GB0425145

    申请日：2004-11-15

    Applicant: MOTOROLA INC

    Inventor： YOUNG MALCOLM J ,  EMBERSON GRANT MICHAEL

    IPC: H04W76/06 ,  H04W84/08

    Abstract: A method of operation in a message trunked mode of a trunked communication system (100) comprising a plurality of user terminals (MS 3, MS 5, MS 7) and a controller (17), including the following steps carried out by the controller: (i) allocating a communication channel when a first one (MS 3) of the user terminals has requested initiation of a call; (ii) applying a hang time upon detection that a participant in a call has finished communicating (e.g. speaking) and keeping the channel allocated to the call during the hang time; (iii) determining if one of the user terminals participating in the call requests during the hang time to continue (e.g. to continue a conversation in) the call; and (iv) clearing the communication channel if no call continuation request from one of the participating user terminals has been detected and/or granted when the hang time has expired; wherein the controller (17) is operable to apply variable hang times during operation of the system. Also described are a system and controller for operation of the method.

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