Simulcast group determination of best signal by master site
    81.
    发明授权
    Simulcast group determination of best signal by master site 失效
    Simulcast组由主站确定最佳信号

    公开(公告)号:US5448758A

    公开(公告)日:1995-09-05

    申请号:US23982

    申请日:1993-02-26

    摘要: Processing of dispatch calls in a simulcast multi-site communication system begins when a source communication unit transmits a message to one or more network receivers. The received signals are analyzed immediately at the received sites for signal quality. Each of the signals are time stamped to identify when they where received. The received signals are transported with their time stamp and signal quality metric to each of the other sites via a digital communication network connecting the sites. A master transmitter site determines the receiver source with the best quality signal as indicated by the signal quality metric. The master transmitter then transports the chosen best quality signal to each of the other sites via a digital communication network. Each transmitter site performs a transmit operation by storing the chosen best quality signal until it is time to transmit the signal in phase with all the other transmitter sites in a simulcast manner. The time stamp allows a time in the future to be chosen to accommodate the worst case expected transport delay through the digital network.

    摘要翻译: 当源通信单元向一个或多个网络接收器发送消息时,开始在联播多站点通信系统中的调度呼叫的处理。 在接收到的站点立即分析接收的信号以获得信号质量。 每个信号都加上时间戳,以便识别何时收到。 接收到的信号通过连接这些站点的数字通信网络以其时间戳和信号质量度量传送到每个其他站点。 主发射机站点以由信号质量度量指示的最佳质量信号来确定接收机源。 主发射机然后通过数字通信网络将所选择的最佳质量信号传送到其他站点。 每个发射器站点通过存储所选择的最佳质量信号来执行发射操作,直到以同时广播的方式与所有其他发射机站点同步发射信号的时间。 时间戳允许将来选择一个时间来适应通过数字网络预期的最差传输延迟。

    Communication system with geographic reuse dynamically sensitive to
communication unit type
    82.
    发明授权
    Communication system with geographic reuse dynamically sensitive to communication unit type 失效
    具有地理重用性的通信系统对通信单元类型动态敏感

    公开(公告)号:US5428815A

    公开(公告)日:1995-06-27

    申请号:US693200

    申请日:1991-04-30

    申请人: Gary W. Grube

    发明人: Gary W. Grube

    IPC分类号: H04W16/02 H04W16/12 H04Q7/36

    CPC分类号: H04W16/12 H04W16/02 Y02B60/50

    摘要: Geographic reuse of frequencies within a multisite communication system are dynamically altered as a function of communication unit type. Since some communication unit types pose a smaller risk of interference, increased geographic reuse can be tolerated. Similarly, reuse can be diminished to accommodate communication unit types that pose a significant risk of interference over a wide geographic area.

    摘要翻译: 作为通信单元类型的函数,动态地改变多站点通信系统内的频率的地理重用。 由于某些通信单元类型具有较小的干扰风险,因此可以容忍增加的地理重用。 类似地,可以减少重用以适应在广泛的地理区域造成干扰的重大风险的通信单元类型。

    Communication system message authentication
    84.
    发明授权
    Communication system message authentication 失效
    通信系统消息认证

    公开(公告)号:US5239680A

    公开(公告)日:1993-08-24

    申请号:US675383

    申请日:1991-03-26

    IPC分类号: H04W84/08

    CPC分类号: H04W84/08

    摘要: Authentication of system status OSWs in a trunked communication system is provided by first verifying (411) that a received system ID (313) matches a pre-programmed system ID. A system status OSW must then be matched twice before the information in the system status OSW is programmed into a communication unit (115), thus limiting the possibility of false decoding of system status OSWs.

    摘要翻译: 通过首先验证(411)接收到的系统ID(313)与预编程的系统ID相匹配来提供集群通信系统中的系统状态OSW的认证。 在系统状态OSW中的信息被编程到通信单元(115)之前,系统状态OSW必须匹配两次,从而限制系统状态OSW的错误解码的可能性。

    Automatic control channel acquisition method and apparatus in a trunked
communication system
    85.
    发明授权
    Automatic control channel acquisition method and apparatus in a trunked communication system 失效
    中继通信系统中的自动控制信道采集方法和装置

    公开(公告)号:US5125103A

    公开(公告)日:1992-06-23

    申请号:US516419

    申请日:1990-04-30

    IPC分类号: H04W84/08

    CPC分类号: H04W84/08

    摘要: A trunked communication system automatic system resource acquisition method and apparatus provide for utilizing dual system resource listings to monitor for priority communications within a primary geographic communication control area. System resources on a second listing have secondary geographic coverage areas substantially within a primary geographic communication control area, allowing communication units to receive priority transmission preferentially from secondary control system resources in a first listing and secondarily from primary control system resources in a second listing when secondary control system resources are not available.

    摘要翻译: 集群通信系统自动系统资源获取方法和装置提供利用双系统资源列表来监视主地理通信控制区域内的优先通信。 第二列表上的系统资源具有基本上在主地理通信控制区域内的辅助地理覆盖区域,允许通信单元优先从第二列表中的次级控制系统资源接收优先级传输,并且次要地从第二列表中的主控制系统资源接收次级地理覆盖区域 控制系统资源不可用。

    PROVIDING STATUS OF USER DEVICES DURING AN ADVERSE CONDITION

    公开(公告)号:US20190246261A1

    公开(公告)日:2019-08-08

    申请号:US16388978

    申请日:2019-04-19

    申请人: Gary W. Grube

    发明人: Gary W. Grube

    摘要: A method includes establishing information regarding a potentially adverse condition associated with one or more user devices. The information includes one or more of: geographic location coordinates of the potentially adverse condition, an identifier of the potentially adverse condition, and a relevant time period of the potentially adverse condition. The method further includes determining group constraints for a group regarding the potentially adverse condition. The group constraints include one or more of: family member devices, neighbor devices, friend devices, first responders, co-workers, and devices of other persons having an affiliating commonality. The method further includes selecting user devices to produce selected user devices. The selected user devices have an affiliation with the group. The method further includes obtaining status associated with the selected user devices and issuing the status to the selected user devices.