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    41.
    发明专利
    未知

    公开(公告)号：BR9402888A

    公开(公告)日：1995-04-11

    申请号：BR9402888

    申请日：1994-07-21

    Applicant: MOTOROLA INC

    Inventor： BLASIAK DAREK ,  PFEIL JEFF ,  ERICKSON PAUL M

    IPC: H04B7/26 ,  H04M20060101 ,  H04W84/08

    Abstract: A multi-site communication system (100) includes a plurality of communication units (106, 107) roaming among communication sites (108-111). The communication sites (108-111) are controlled by a central controller (100), via repeaters (102-105), and are thereby capable of establishing communication among sites. A method for minimizing message interruptions during a hand-off, of a first communication unit between two sites, includes the step of receiving (200) a message (300) from a second communication unit. During the message (300), which may be delivered at varying information rates, the first communication unit determines (202) the signal quality. If the signal quality of the message is unfavorable, the receiving communication unit determines (204) when the varying information rate of the message is favorable for a hand-off. Lastly, when the varying information rate is favorable for a hand-off, the first communication unit requests (205) the hand-off.

    Fault Tolerant Radio Communication System Controller
    42.
    发明专利
    Fault Tolerant Radio Communication System Controller 未知

    公开(公告)号：CA2115656A1

    公开(公告)日：1994-01-06

    申请号：CA2115656

    申请日：1993-06-04

    Applicant: MOTOROLA INC

    Inventor： ROZENSTRAUCH ALEXANDER ,  ERICKSON PAUL M

    IPC: H04B1/74 ,  H04B7/15 ,  H04W24/00 ,  H04B7/005

    Abstract: A radio communication system controller (100) includes a first (103) and second (104) processor for processing input communication messages (101) used in a radio communication system. The controller (100) further includes shared memory (105), which memory is accessible to each of the first (103) and second (104) processors, for storing the input communication messages (101). The controller (100) is further equipped with fault detection capability (107) for determining (402) when a processing fault has occurred.

    SECTORED ANTENNA RECEIVING SYSTEM
    45.
    发明专利
    SECTORED ANTENNA RECEIVING SYSTEM 未知

    公开(公告)号：CA1085954A

    公开(公告)日：1980-09-16

    申请号：CA299062

    申请日：1978-03-16

    Applicant: MOTOROLA INC

    Inventor： CRAIG TIMOTHY P ,  STIMPLE JAMES R ,  ERICKSON PAUL M

    IPC: H01Q3/24 ,  H04B7/08 ,  H04B7/10 ,  H04B7/26 ,  H04W16/24

    Abstract: SECTORED ANTENNA RECEIVING SYSTEM A plurality of horizontally directive antenna sectors are arranged in configuration to receive signals from remote transmitters over a given angle in the horizontal plane. A scanning system is operative in one of several modes to sequentially couple each sector to a receiver. In its first mode, each sector is sequentially scanned with the peak signal level therefrom being compared to a reference level. If the signal level on any sector exceeds its reference level the scanner activates to its second mode wherein scanning of all sectors continues for a predetermined interval after which the system advances to a selective scanning mode wherein scan is limited to that sector with the largest stored signal level relative to its reference level, and to those sectors adjacent said sector. At the end of this interval, scanning is inhibited and the receiver is coupled to that sector which exhibited the strongest relative signal level during the scanning sequences. In this inhibit scan mode, if the signal level from the sector falls to a minimum level for a given time period the system reverts to the first scanning mode. The system periodically updates the reference levels to account for changes in background noise or the presence of an interfering signal.

    METHOD AND APPARATUS FOR PROVIDING PRIORITIZED MULTI-PARTY COMMUNICATION SESSIONS IN A WIRELESS COMMUNICATION SYSTEM
    46.
    发明公开
    METHOD AND APPARATUS FOR PROVIDING PRIORITIZED MULTI-PARTY COMMUNICATION SESSIONS IN A WIRELESS COMMUNICATION SYSTEM 有权
    方法和装置用于在无线通信系统EIENEM提供具有优先级的详细党的会议

    公开(公告)号：EP1530826A4

    公开(公告)日：2007-04-18

    申请号：EP03763025

    申请日：2003-06-26

    Applicant: MOTOROLA INC

    Inventor： WOLF TRACY L ,  ERICKSON PAUL M ,  STANAWAY JOHN C ,  DROZT PETER M ,  VAN SWOL STEVEN E

    IPC: H04B1/00 ,  H04W4/08

    CPC classification number: H04W4/08 ,  H04W8/186

    Abstract: A wireless communication system (100) that includes an MS (105) that is a member of multiple talkgroups (110, 112) provides for a prioritization of the multiple talkgroups. A database (128) included in the system maintains an MS identifier associated with the MS and maintains multiple talkgroup identifiers in association with the MS identifier, wherein each talkgroup identifier of the multiple talkgroup identifiers corresponds to a talkgroup of the multiple talkgroups. The database further maintains a prioritization associated with at least one talkgroup of the multiple talkgroups. In one embodiment of the invention, the MS (105) may dynamically prioritize the multiple talkgroups to which it belongs. In another embodiment of the present invention, the prioritization may be statically maintained. In still another embodiment of the invention, the system utilizes the maintained prioritizations to determine whether to interrupt the MS when the MS is involved in a multi-party communication session.

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