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。

    Method and apparatus for providing interoperation between a digital communication system and a public switched telephone network
    5.
    再颁专利
    Method and apparatus for providing interoperation between a digital communication system and a public switched telephone network 有权
    用于提供数字通信系统和公共交换电话网络之间的互操作的方法和装置

    公开(公告)号:USRE40057E1

    公开(公告)日:2008-02-12

    申请号:US11055791

    申请日:2005-02-11

    摘要: An interworking unit (14) for providing an interface between a digital communication network (12) and a public switched telephone network (PSTN) (16) includes a de-vocoder (30), a protocol termination unit (32), and a signal combiner (34) for processing signals being transferred from the digital network (12) to the PSTN (16). A digital communication signal received by the interworking unit (14) from the digital network (12) is processed by both the de-vocoder (30) and the protocol termination unit (32). The outputs of the de-vocoder (30) and the protocol termination unit (32) are then combined into a uniquely formatted signal that is then delivered into the PSTN (12). Similar functionality is also provided for processing signals in the reverse direction. The interworking unit 14 is capable of processing signals traversing the interface between the networks (12, 16) without a priori knowledge of the signal type being processed.

    摘要翻译: 用于在数字通信网络(12)和公共交换电话网络(PSTN)(16)之间提供接口的互通单元(14)包括去声码器(30),协议终端单元(32)和信号 用于处理从数字网络(12)传送到PSTN(16)的信号的组合器(34)。 由数字网络(12)由互通单元(14)接收的数字通信信号由去声码器(30)和协议终端单元(32)两者进行处理。 然后,去声码器(30)和协议终端单元(32)的输出被组合成唯一格式化的信号,然后传送到PSTN(12)。 还提供了用于在相反方向处理信号的类似功能。 互通单元14能够处理跨越网络(12,16)之间的接口的信号,而无需处理信号类型的先验知识。

    Method and apparatus for providing interoperation between a digital communication system and a public switched telephone network
    6.
    发明授权
    Method and apparatus for providing interoperation between a digital communication system and a public switched telephone network 有权
    用于提供数字通信系统和公共交换电话网络之间的互操作的方法和装置

    公开(公告)号:US06519336B1

    公开(公告)日:2003-02-11

    申请号:US09650516

    申请日:2000-08-29

    IPC分类号: H04J316

    摘要: An interworking unit (14) for providing an interface between a digital communication network (12) and a public switched telephone network (PSTN) (16) includes a de-vocoder (30), a protocol termination unit (32), and a signal combiner (34) for processing signals being transferred from the digital network (12) to the PSTN (16). A digital communication signal received by the interworking unit (14) from the digital network (12) is processed by both the de-vocoder (30) and the protocol termination unit (32). The outputs of the de-vocoder (30) and the protocol termination unit (32) are then combined into a uniquely formatted signal that is then delivered into the PSTN (12). Similar functionality is also provided for processing signals in the reverse direction. The interworking unit 14 is capable of processing signals traversing the interface between the networks (12, 16) without a priori knowledge of the signal type being processed.

    摘要翻译: 用于在数字通信网络(12)和公共交换电话网络(PSTN)(16)之间提供接口的互通单元(14)包括去声码器(30),协议终端单元(32)和信号 用于处理从数字网络(12)传送到PSTN(16)的信号的组合器(34)。 由数字网络(12)由互通单元(14)接收的数字通信信号由去声码器(30)和协议终端单元(32)两者进行处理。 然后,去声码器(30)和协议终端单元(32)的输出被组合成唯一格式化的信号,然后传送到PSTN(12)。 还提供了用于在相反方向处理信号的类似功能。 互通单元14能够处理跨越网络(12,16)之间的接口的信号,而无需处理信号类型的先验知识。

    Method and apparatus for generating and verifying encrypted data packets
    7.
    发明授权
    Method and apparatus for generating and verifying encrypted data packets 失效
    用于生成和验证加密数据分组的方法和装置

    公开(公告)号:US06219791B1

    公开(公告)日:2001-04-17

    申请号:US09102192

    申请日:1998-06-22

    IPC分类号: G06F1130

    摘要: A system for encrypting and verifying a data packet includes an encryptor (20), a decryptor (30), an error detector (40), and switch (65). A data packet with embedded error detection codes is encrypted by the encryptor (20), decrypted by the decryptor (30), and then the error detector (40) examines the embedded error detection codes to determine if the data packet has had errors introduced during the encryption/decryption process. When errors are detected, the switch (65) is opened to keep erroneous data from being transmitted.

    摘要翻译: 用于加密和验证数据分组的系统包括加密器(20),解密器(30),错误检测器(40)和开关(65)。 具有嵌入式错误检测码的数据包由加密器(20)加密,由解密器(30)解密,然后,错误检测器(40)检查嵌入式错误检测码,以确定数据包是否已经在 加密/解密过程。 当检测到错误时,开关(65)被打开以保持错误的数据不被传输。

    Radio communication network and method for unobstrusive call
interception via data duplication
    8.
    发明授权
    Radio communication network and method for unobstrusive call interception via data duplication 失效
    无线通信网络和通过数据复制进行无阻塞呼叫截取的方法

    公开(公告)号:US5710971A

    公开(公告)日:1998-01-20

    申请号:US574060

    申请日:1995-12-18

    IPC分类号: H04B7/185 H04M3/22

    CPC分类号: H04B7/1856

    摘要: A digital cellular telecommunication network (30) uses transcoders (50) which vocode voice using a maximal lossy compression algorithm which conserves spectrum usage. A call path for an intercepted call is looped from an outer space satellite (32) network into a terrestrial gateway (34). Compressed call data for each of two half-calls in this call path are duplicated at any of the network nodes and inserted into the opposing half-call. In addition, the compressed call data are decompressed in a gateway transcoder (50), combined in a conference bridge (90), and routed to a monitoring center (60). A subscriber unit (36), a second device (48), and the monitoring center (60) all receive call data which has experienced only one compression/decompression cycle.

    摘要翻译: 数字蜂窝电信网络(30)使用代码转换器(50),其使用节省频谱使用的最大有损压缩算法对语音进行语音编码。 被拦截的呼叫的呼叫路径从外层空间卫星(32)网络循环到地面网关(34)中。 在该呼叫路径中的两个半呼叫中的每一个的压缩呼叫数据在任何网络节点上复制并插入到相对的半呼叫中。 此外,压缩呼叫数据在网关代码转换器(50)中解压缩,组合在会议桥(90)中,并被路由到监控中心(60)。 用户单元(36),第二设备(48)和监视中心(60)都接收仅经历一个压缩/解压周期的呼叫数据。

    Method for location based intercept in a communication system
    9.
    发明授权
    Method for location based intercept in a communication system 失效
    通信系统中基于位置的截距的方法

    公开(公告)号:US06138013A

    公开(公告)日:2000-10-24

    申请号:US022829

    申请日:1998-02-12

    IPC分类号: H04B7/185 H04Q7/22

    摘要: A method for providing location based intercept in a satellite communications system (10) includes the steps of determining a location area of a party (220), determining whether the location area is one to be monitored (240), and conditionally routing the call to an intercept gateway (250). An intercept gateway (32) is a gateway that intercepts all or part of the calls received, and can also function as a home gateway (30) or a visiting gateway (40).

    摘要翻译: 一种用于在卫星通信系统(10)中提供基于位置的拦截的方法包括以下步骤:确定一方的位置区域(220),确定所述位置区域是否是待监视的区域(240),以及有条件地将所述呼叫路由到 拦截网关(250)。 拦截网关(32)是拦截所有或部分接收的呼叫的网关,也可以用作家庭网关(30)或访问网关(40)。

    Method and apparatus for signaling privacy in personal communications
systems
    10.
    发明授权
    Method and apparatus for signaling privacy in personal communications systems 失效
    个人通信系统信令隐私的方法和装置

    公开(公告)号:US6081600A

    公开(公告)日:2000-06-27

    申请号:US939720

    申请日:1997-10-03

    摘要: A system and method provides signaling privacy for communications between nodes of a communications network (30). Multiple logical links exist between distinct network nodes (38-40, 42, 50-53) of the communication network (30). Signaling privacy is achieved by a subscriber unit (80) providing encryption/decryption of signaling data messages at the messaging level. The subscriber unit (80) employs a signaling encryptor/decryptor (86) along the signaling path, which enables the signaling data messages to be separately encrypted from data on the traffic channel. The encrypted signaling data can then be sent along a different logical link from the traffic, while maintaining cipher key synchronization between the signaling encryptor/decryptor (86) and a network encryptor/decryptor (78) at a remote end of the logical link which transports the encrypted signaling data.

    摘要翻译: 系统和方法为通信网络(30)的节点之间的通信提供信令隐私。 在通信网络(30)的不同网络节点(38-40,42,50-53)之间存在多个逻辑链路。 信令隐私由在消息级提供信令数据消息的加密/解密的用户单元(80)实现。 用户单元(80)沿着信令路径使用信令加密器/解密器(86),其使信令数据消息能够与业务信道上的数据分开加密。 然后,加密的信令数据可以沿着不同的逻辑链路从流量发送,同时保持信令加密器/解密器(86)与逻辑链路的远程端的网络加密器/解密器(78)之间的密码密钥同步, 加密信令数据。