Group radio with subscriber-radio controlled channel selection
    2.
    发明授权
    Group radio with subscriber-radio controlled channel selection 有权
    具有用户无线电控制信道选择的组无线电

    公开(公告)号:US06529740B1

    公开(公告)日:2003-03-04

    申请号:US09459024

    申请日:1999-12-10

    IPC分类号: H04B700

    摘要: A point-to-multipoint (PTM) communication system (20) includes a cellular radio infrastructure (22) having base stations (32) implemented in satellites (34) placed in low earth orbits (38). PTM subscriber radios (24) share common cellular radio infrastructure (22) multipoint channels (52) to engage in a common PTM communication session while the cellular radio infrastructure (22) also conveys point-to-point communications. A group control computer (28) constructs a channel list (126) which is downloaded to PTM subscriber radios (24). The channel list (126) identifies multipoint channels (52) and indicates when and where the channels (52) are active. Without emitting transmissions to the cellular radio infrastructure (22), PTM subscriber radios (24) autonomously switch to new multipoint channels (52) in response to their current time and location and the channel list (126).

    摘要翻译: 点对多点(PTM)通信系统(20)包括蜂窝无线电基础设施(22),其具有实现在放置在低地球轨道(38)中的卫星(34)中的基站(32)。 PTM用户无线电(24)共享公共蜂窝无线电基础设施(22)多点通道(52)以便在蜂窝无线电基础设施(22)也传达点对点通信的同时参与公共的PTM通信会话。 组控制计算机(28)构建下载到PTM用户无线电(24)的频道列表(126)。 信道列表(126)识别多点信道(52)并且指示信道(52)何时和在哪里是活动的。 在不向蜂窝无线电基础设施(22)发射传输的情况下,PTM用户无线电(24)响应于它们当前的时间和位置以及信道列表(126)自主地切换到新的多点信道(52)。

    Group radio communication system and method using interconnected radio sub-networks
    3.
    发明授权
    Group radio communication system and method using interconnected radio sub-networks 有权
    使用互联无线电子网的组无线电通信系统和方法

    公开(公告)号:US06591111B1

    公开(公告)日:2003-07-08

    申请号:US09459319

    申请日:1999-12-10

    IPC分类号: H04Q720

    CPC分类号: H04B7/18584

    摘要: A group radio communication system (20) includes a group controller (24) which communicates through a satellite-based packet switched data communication network (22) to converters (28). The converters (28) are located within radio coverage areas (36) of various radio sub-networks (26). Each radio sub-network (26) includes a base station (32), controller (30) and any number of subscriber radios. The controllers (30) manage point-to-multipoint communications between subscriber radios (34) within their radio sub-networks (26), and the group controller (24) manages point-to-multipoint communications between radio sub-networks (26). The converters (28) translate between protocols (38, 38′) established for communications within specific radio sub-networks (26) and a protocol (56) established for communication over the packet switched data communication network (22). The group controller (24) duplicates and distributes packets (118) originating in one radio sub-network (26) to other radio sub-networks (26).

    摘要翻译: 组无线电通信系统(20)包括通过基于卫星的分组交换数据通信网络(22)与转换器(28)进行通信的组控制器(24)。 转换器(28)位于各种无线电子网络(26)的无线电覆盖区域(36)内。 每个无线电子网(26)包括基站(32),控制器(30)和任意数量的用户无线电。 控制器(30)管理其无线电子网络(26)内的用户无线电(34)之间的点对多点通信,并且组控制器(24)管理无线电子网络(26)之间的点对多点通信, 。 转换器(28)在针对特定无线电子网络(26)内的通信建立的协议(38,38')和建立用于通过分组交换数据通信网络(22)进行通信的协议(56)之间进行转换。 组控制器(24)将发起一个无线电子网(26)的分组(118)复制并分发给其他无线电子网(26)。

    Method and apparatus for establishing a group call session in a communication system
    4.
    发明授权
    Method and apparatus for establishing a group call session in a communication system 有权
    用于在通信系统中建立群组呼叫会话的方法和装置

    公开(公告)号:US06456855B1

    公开(公告)日:2002-09-24

    申请号:US09650386

    申请日:2000-08-29

    IPC分类号: H04B700

    摘要: A communication system (10) includes a group call controller (GCC) (26) for use in establishing, maintaining, and controlling the provision of group call services within the communication system (10). To initiate a group call session for a particular subscriber group, a group call request is delivered to the GCC (26) that identifies the desired group. Upon receipt of the request, the GCC (26) coordinates the delivery of group call notification to the members of the identified group to notify the members of the initiation of the group call session and to identify to the members a physical communication channel (36) to be used by each member to participate in the group call. Upon receipt of the notification, the group members each tune to a corresponding physical communication channel (36) and are immediately made part of the group call. The group members are not required to make any transmissions on the physical channel (36) to participate in the group call.

    摘要翻译: 通信系统(10)包括用于建立,维护和控制通信系统(10)内的群组呼叫服务的提供的群组呼叫控制器(GCC)(26)。 为了发起针对特定订户组的群组呼叫会话,将群组呼叫请求传递给识别期望群组的GCC(26)。 在接收到请求时,GCC(26)协调向所识别的组的成员发送组呼叫通知,以通知成员启动组呼呼叫,并向成员识别物理通信信道(36) 由每个成员使用以参与群组呼叫。 在接收到通知时,组成员每个调谐到对应的物理通信信道(36),并立即成为组呼。 群组成员不需要在物理频道(36)上进行任何传输以参与群组呼叫。