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    Synchronisation of mobile devices communicating in a direct mode of operation
    2.
    发明专利
    Synchronisation of mobile devices communicating in a direct mode of operation 未知

    公开(公告)号：GB2414362A

    公开(公告)日：2005-11-23

    申请号：GB0411027

    申请日：2004-05-18

    Applicant: MOTOROLA INC

    Inventor： OFIR GABI ,  DORY DAN ,  SUPLIN ANATOLIY

    IPC: H04B7/26 ,  H04W56/00

    Abstract: A first mobile device (300) is capable of communication with a second mobile device on a communication system employing an unsynchronised timing structure (e.g. Direct Mode Operation (DMO) in a TETRA system). The mobile device (300) comprises a signal processing function (308) coupled to a timer function (318), such that the signal processor function (308) is configured to detect a frame-type of a transmission from the second mobile device and adapt a timing parameter of the timer function (318) in response thereto in order to acquire synchronisation. A method of acquiring synchronisation is also provided. In this manner, by detecting a frame type such as a synchronisation transmission frame/burst, a wireless mobile device is able to synchronise to another mobile device in an unsynchronised communication system using lower power consumption and a lower processor bandwidth.

    Method of operation in a wireless communication system and a client node, an infrastructure node and a system operable to use the method
    3.
    发明专利
    Method of operation in a wireless communication system and a client node, an infrastructure node and a system operable to use the method 未知

    公开(公告)号：GB2436661B

    公开(公告)日：2008-04-30

    申请号：GB0606260

    申请日：2006-03-29

    Applicant: MOTOROLA INC

    Inventor： BAR EITAN ,  DORY DAN ,  VIGOUTOV EVGENE

    IPC: H04L12/28

    Abstract: A method of operation (300) of a wireless communication system (100) includes: a client node sending (301) to the infrastructure node a message indicating that it intends to enter an unassociated state and a message requesting (303) the infrastructure node to store for the client node data of at least one multicast or broadcast transmission to be sent by the infrastructure node while the client node is in an unattached state; the client node entering (317) an unattached state and missing (319) at least one multicast or broadcast transmission while in the unattached state; the infrastructure node storing (323) for the client node while the client node is in the unattached state the data of the at least one missed multicast or broadcast transmission; and the infrastructure node sending (331) the stored data to the client node when the client node is in an associated state.

    Direct mode cellular communication system
    6.
    发明专利
    Direct mode cellular communication system 未知

    公开(公告)号：GB2409375A

    公开(公告)日：2005-06-22

    申请号：GB0329175

    申请日：2003-12-17

    Applicant: MOTOROLA INC

    Inventor： OFIR GABI ,  DORY DAN ,  SHEVAH ITALY

    IPC: H04W4/10 ,  H04W76/04 ,  H04W84/08 ,  H04Q7/28

    Abstract: A cellular communication system (100) comprises at least one central station (101) and a plurality of remote units (105-111) which may communicate in direct mode with each other without involving the central station. The remote units (105-111) may also communicate in trunked mode via the central station. The communication system (100) comprises a control remote unit (113) which comprises a direct mode controller (209) for entering a direct mode controller mode. In this mode, the direct mode controller (209) controls a transmitter (205) to transmit direct mode control messages to the other remote units (105-111). The direct mode control messages comprise information associated with radio channels for direct mode communication including for example synchronisation information, radio channel allocation information, radio channel availability information etc. The information may facilitate the operation of the remote units (105-111) and improve direct mode performance. The invention is suitable e.g. for a TETRA communication system.

    METHOD OF OPERATION OF A WIRELESS COMMUNICATION SYSTEM
    10.
    发明申请
    METHOD OF OPERATION OF A WIRELESS COMMUNICATION SYSTEM 审中-公开
    无线通信系统的操作方法

    公开(公告)号：WO2007117848A3

    公开(公告)日：2008-01-24

    申请号：PCT/US2007063945

    申请日：2007-03-14

    Applicant: MOTOROLA INC ,  BAR EITAN ,  DORY DAN ,  VIGOUTOV EUGENE

    Inventor： BAR EITAN ,  DORY DAN ,  VIGOUTOV EUGENE

    IPC: H04B7/185

    CPC classification number: H04W28/14 ,  H04W52/0212 ,  H04W52/0216 ,  H04W52/0219 ,  H04W76/002 ,  H04W76/048 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/22

    Abstract: A method of operation (300) of a wireless communication system (100) includes: a client node sending (301) to the infrastructure node a message indicating that it intends to enter an unassociated state and a message requesting (303) the infrastructure node to store for the client node data of at least one multicast or broadcast transmission to be sent by the infrastructure node whilst the client node is in an unattached state; the client node entering (317) an unattached state and missing (319) at least one multicast or broadcast transmission whilst in the unattached state; the infrastructure node storing (323) for the client node whilst the client node is in the unattached state the data of the at least one missed multicast or broadcast transmission; and the infrastructure node sending (331) the stored data to the client node when the client node is in an associated state.

    Abstract translation: 无线通信系统（100）的操作方法（300）包括：客户机节点向基础结构节点发送（301）指示其意图进入未关联状态的消息和向基础结构节点请求（303）的消息 在客户端节点处于未附着状态的同时存储要由基础设施节点发送的至少一个多播或广播传输的客户端节点数据; 客户端节点在未附着状态下进入（317）未连接状态并丢失（319）至少一个多播或广播传输; 所述基础设施节点在所述客户端节点处于所述未附着状态时存储所述客户端节点的所述至少一个丢失的多播或广播传输的数据; 并且当客户端节点处于关联状态时，基础结构节点将存储的数据发送（331）到客户机节点。

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