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1.发明授权
公开(公告)号：US5819171A
公开(公告)日：1998-10-06
申请号：US521797
申请日：1995-08-31
申请人： David N. Hoogerwerf , David M. Stanhope , William Gerrit Barrere , Evan R. Green , Randolph W. McKernan
发明人： David N. Hoogerwerf , David M. Stanhope , William Gerrit Barrere , Evan R. Green , Randolph W. McKernan
CPC分类号： H04W76/06
摘要： A method and apparatus which provide the ability to disrupt normal completion of a specific call made through a wireless telephone system. The specified call can be forced to be immediately ended, re-routed immediately to a selectable destination, or linked to a local voice frequency interface. The disruption of the call can occur at any point in time over the duration of the call. The decision to disrupt the call, as well as which action to take against the call, can be selected manually by a human or automatically through a standard data interface provided. The call disruption apparatus can be interfaced to the wireless system through a circuit physically connected to the wireless telephone system equipment, or through a modulated radio frequency interface.
摘要翻译： 提供通过无线电话系统中断正常完成特定呼叫的能力的方法和装置。 可以强制指定的呼叫立即结束，立即重新路由到可选择的目的地，或链接到本地语音接口。 呼叫的中断可以在呼叫的持续时间内的任何时间点发生。 打扰呼叫的决定以及对呼叫采取的行动，可以由人手动或通过提供的标准数据接口自动选择。 呼叫中断装置可以通过物理连接到无线电话系统设备的电路或通过调制的射频接口来连接到无线系统。
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公开(公告)号：US6035188A
公开(公告)日：2000-03-07
申请号：US670489
申请日：1996-06-27
摘要： A method and system for actively and rapidly collecting reference waveforms from a large number of cellular telephones is provided. The reference waveforms are used to generate fingerprints which are used to distinguish between authorized cellular telephones and unauthorized cellular telephones. Initially, the system selects a cellular telephone whose reference waveform is desired. The selected cellular telephone is then sent a polling message such as a page or registration request. The cellular telephone receives the polling message and transmits a radio frequency (RF) signal containing a reference waveform that contains certain transmission characteristics unique to the selected cellular telephone. From the received RF signal, the reference waveform is extracted and stored. Preferably, the selected cellular telephone is polled repeatedly in order to receive a sufficiently large number of reference waveforms to be able to generate an accurate fingerprint. One method of polling the cellular telephone is by calling the selected cellular telephone through a cellular telephone system. Another method of polling the cellular telephone is by transmitting a control message such as a page, registration, audit or maintenance message.
摘要翻译： 提供了一种从大量蜂窝电话中主动快速收集参考波形的方法和系统。 参考波形用于产生用于区分授权蜂窝电话和未授权蜂窝电话的指纹。 最初，系统选择需要参考波形的蜂窝电话。 然后，所选择的蜂窝电话发送诸如页面或注册请求之类的轮询消息。 蜂窝电话接收轮询消息，并发送包含包含所选移动电话所特有的某些传输特性的参考波形的射频（RF）信号。 从接收到的RF信号中，提取并存储参考波形。 优选地，所选择的蜂窝电话被重复轮询，以便接收足够大量的参考波形以能够产生准确的指纹。 轮询蜂窝电话的一种方法是通过蜂窝电话系统呼叫所选择的蜂窝电话。 轮询蜂窝电话的另一种方法是通过发送诸如页面，注册，审核或维护消息之类的控制消息。
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公开(公告)号：US5893031A
公开(公告)日：1999-04-06
申请号：US670512
申请日：1996-06-27
摘要： A system and method for collecting fingerprint reference wave forms under controlled conditions includes a radio frequency (RF) enclosure designed to receive a cellular telephone. A control system, including a transmitter and receiver provides RF communications with a cellular phone placed in the enclosure. A processor controls operation of the transmitter and receiver. The processor sends commands to the cellular phone in the enclosure using the transmitter. The transmitted commands are selected to elicit a RF transmission from the cellular phone in response to the command. The receiver detects the response from the cellular telephone and generates a reference wave form indicative of the transmission characteristics of the transmitter of the cellular phone in the enclosure. The processor captures one or more reference waveforms that can be used to generate a fingerprint indicative of a transmission characteristic of the transmitter of the cellular telephone. In addition, the system can include an external power supply and temperature control system to vary the voltage level of power supplied to the cellular telephone in the enclosure and to vary the temperature in the enclosure. By varying the operating voltage and temperature, the processor can collect reference waveforms under a variety of operating conditions. In addition, the processor can select the carrier frequency for the cellular telephone and for the transmitter and receiver of the control system. Furthermore, the processor can vary the transmit power of the system transmitter and the transmit power of the transmitter within the cellular telephone itself. The system is sized to be readily moved from one location to another to permit the simple collection of reference waveforms under a variety of controlled conditions.
摘要翻译： 用于在受控条件下收集指纹参考波形的系统和方法包括设计用于接收蜂窝电话的射频（RF）机箱。 包括发射器和接收器的控制系统提供与放置在外壳中的蜂窝电话的RF通信。 处理器控制发射机和接收机的操作。 处理器使用发射器向外壳中的蜂窝电话发送命令。 选择发送的命令以响应于该命令从蜂窝电话引出RF传输。 接收机检测来自蜂窝电话的响应，并产生指示在机箱中的蜂窝电话的发射机的传输特性的参考波形。 处理器捕获一个或多个可用于生成指示蜂窝电话的发射机的传输特性的指纹的参考波形。 另外，该系统可以包括一个外部电源和温度控制系统，以改变提供给外壳中的蜂窝电话的电力的电压电平并改变外壳中的温度。 通过改变工作电压和温度，处理器可以在各种工作条件下收集参考波形。 此外，处理器可以选择用于蜂窝电话和控制系统的发射机和接收机的载波频率。 此外，处理器可以改变系统发射机的发射功率和蜂窝电话本身内的发射机的发射功率。 该系统的大小可以容易地从一个位置移动到另一个位置，以允许在各种受控条件下简单地收集参考波形。
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4.发明授权Detection and prevention of channel grabbing in a wireless communications system 失效无线通信系统中通道抓取的检测和防范
公开(公告)号：US5956635A
公开(公告)日：1999-09-21
申请号：US680930
申请日：1996-07-16
CPC分类号： H04W12/12
摘要： A method and system for detecting a voice channel grab by a pirate in a cellular telephone network. Initially, RF signals transmitted to and from an authorized cellular telephone over the control and voice channels are monitored to track call processing activities and obtain various data that are used to detect potential voice channel grabbing attempts. The data may include such things as RSSI, change power output messages and responses, and hook-flash signal. From the data, the system looks for two events. A first event is an unexpected change or an absence of an expected change in the voice channel RF signal indicating that the pirate may be transmitting on the voice channel. The first event may be any one or more of the following: (1) a sudden upward shift in the voice channel RSSI; (2) an unexpected phase shift of either the RF signal or the SAT signal contained in the RF signal; and (3) an absence of an expected shift in the RSSI that corresponds to the change power level message from the network. The second event is receipt of a message indicative of a request to establish a new telephone connection such as a hook-flash message initiating a call conference. When the unexpected change in the RF signal and the message indicative of the request to establish the new telephone connection are detected, the system determines that the voice channel assigned to the authorized cellular telephone has been grabbed by the pirate. When the system determines that the channel grab has occurred, it prevents the pirate from establishing the new telephone connection by preventing receipt of dialed digits or terminating the connection on the voice channel.
摘要翻译： 一种用于在蜂窝电话网络中检测盗版者的语音信道抓取的方法和系统。 首先，监控通过控制和语音信道从授权蜂窝电话发送的RF信号以跟踪呼叫处理活动并获得用于检测潜在语音信道抓取尝试的各种数据。 数据可以包括诸如RSSI，改变功率输出消息和响应以及挂钩闪烁信号。 从数据中，系统会查找两个事件。 第一个事件是表示盗版者可能在语音信道上发送的语音信道RF信号的意外变化或预期变化的缺失。 第一个事件可以是以下任何一个或多个：（1）语音信道RSSI中的突然向上移位; （2）RF信号中包含的RF信号或SAT信号的意外相移; 和（3）对应于来自网络的改变功率电平消息的RSSI中没有预期的移位。 第二个事件是接收到指示建立新的电话连接的请求的消息，例如发起呼叫会议的挂机闪烁消息。 当检测到RF信号的意外变化和指示建立新的电话连接的请求的消息时，系统确定分配给授权的蜂窝电话的语音信道已被盗版者抓住。 当系统确定信道抓取已经发生时，通过阻止接收拨号或终止语音信道上的连接来防止盗版者建立新的电话连接。
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