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    • 5. 发明授权
    • Method for indicating unusable sites to communication units in a communication system
    • 用于指示通信系统中通信单元不可用站点的方法
    • US06778829B1
    • 2004-08-17
    • US09586212
    • 2000-06-02
    • Daniel J. McDonaldRobert A. Biggs
    • Daniel J. McDonaldRobert A. Biggs
    • H04Q720
    • H04W48/12H04W48/20
    • From an unusable site, one or more communication units selects a usable site, thereby reducing missed communications. First, a manager determines (201, 401, 601) that a site is unusable for a predetermined set of communication unit(s). The predetermined set of communication units may include one or more individual communication units or communication units that are affiliated with a particular talkgroup at a particular time. A zone controller (104) identifies (205, 405, 605) any communication units from the set that are registered at the unusable site. The zone controller sends (207, 407, 607) a message to the identified units to assist them in leaving the site. The communication units search (303, 505, 709) the near sites for usability and register (307, 515, 713) at new usable sites. An algorithm is provided to stagger registration by communication units at usable sites.
    • 从不可用的站点,一个或多个通信单元选择可用站点,从而减少未通信的通信。 首先,管理者确定(201,401,601)站点不能用于预定的一组通信单元。 预定的一组通信单元可以包括在特定时间附属于特定通话组的一个或多个单独的通信单元或通信单元。 区域控制器(104)识别(205,405,605)从所述集合中注册在不可用站点的任何通信单元。 区域控制器向所识别的单元发送(207,407,607)消息以协助他们离开现场。 通信单位在新的可用站点搜索(303,550,709)可用性和注册(307,515,713)的近处。 提供了一种算法,用于通过可用站点上的通信单元错开注册。
    • 7. 发明授权
    • Access control for roaming radio devices
    • 漫游无线电设备的访问控制
    • US08571549B2
    • 2013-10-29
    • US13296375
    • 2011-11-15
    • Larry M. PetersonDaniel J. McDonaldBrian R. PoeJohn W. Maher
    • Larry M. PetersonDaniel J. McDonaldBrian R. PoeJohn W. Maher
    • H04W4/00
    • H04W8/06H04W8/10H04W8/12H04W8/20
    • Methods and systems are provided for supporting roaming wireless devices and roaming wireless groups with access controls. One exemplary method involves obtaining a set of permissions associated with a roaming device from its home radio system, obtaining a set of permissions for the roaming device from the visited radio system, merging the obtained sets of permissions, and responding to a request from the roaming device in accordance with the merged set of permissions for the roaming device within the visited radio system. Another exemplary method involves obtaining permissions associated with a roaming radio group from its home radio system, obtaining permissions for the roaming radio group from the visited radio system, merging the obtained permissions, and responding to a group service request for the roaming radio group in accordance with the merged set of permissions for the roaming radio group within the visited radio system.
    • 提供了用于支持漫游无线设备和具有访问控制的漫游无线组的方法和系统。 一种示例性方法涉及从其归属无线电系统获得与漫游设备相关联的一组权限,从所访问的无线电系统获得漫游设备的一组权限,合并获得的权限集合,以及响应漫游请求 设备根据被访问无线电系统内的漫游设备的合并的一组权限。 另一个示例性方法包括从其归属无线电系统获得与漫游无线电组相关联的许可,从所访问的无线电系统获得漫游无线电组的许可,合并获得的许可,以及响应于漫游无线电组的组服务请求 具有被访问的无线电系统内的漫游无线电组的合并的一组权限。
    • 8. 发明授权
    • System and method for interrupting a transmitting communication unit in a communication system
    • 用于中断通信系统中的发送通信单元的系统和方法
    • US08144846B2
    • 2012-03-27
    • US11620776
    • 2007-01-08
    • John M. GilbertGary P. HunsbergerDaniel J. McDonald
    • John M. GilbertGary P. HunsbergerDaniel J. McDonald
    • H04M11/00
    • H04W76/30H04W4/10H04W72/10H04W76/45
    • A system and method for interrupting a transmitting communication unit in a communication system. When a call is first initiated, the call is assigned to a communication channel and broadcast from a base site using the assigned communication channel. If it is determined that a transmitting communication unit should be interrupted, a zone controller signals a base site to generate an interrupt message. The base site generates an interrupt message containing an identification code for the transmitting communication unit and broadcasts the interrupt message on an outbound link of the communication channel. The transmitting communication unit, while transmitting on an inbound link of the communication channel, continuously monitors the outbound link. If the transmitting communication unit receives, on the outbound link, an interrupt message containing an identification code matching its own identification code, the transmitting communication unit stops transmitting.
    • 一种用于中断通信系统中的发送通信单元的系统和方法。 当呼叫首次发起时,将呼叫分配给通信信道,并使用分配的通信信道从基站广播。 如果确定发送通信单元应该被中断,则区域控制器向基站发信号以产生中断消息。 基站产生包含发送通信单元的识别码的中断消息,并在通信信道的出站链路上广播中断消息。 发送通信单元在通信信道的入站链路上进行发送时,连续监视出站链路。 如果发送通信单元在出站链路上接收到包含与其自己的识别码相匹配的识别码的中断消息,则发送通信单元停止发送。