公开(公告)号：US06700875B1

公开(公告)日：2004-03-02

申请号：US09052224

申请日：1998-03-31

申请人： Stephen Schroeder ,  Keith M. Conger ,  Richard Wade ,  Michael Jaimie Cooper

发明人： Stephen Schroeder ,  Keith M. Conger ,  Richard Wade ,  Michael Jaimie Cooper

IPC分类号： H04J116

CPC分类号： H04H20/77 ,  H04H20/26 ,  H04L1/0015 ,  H04L1/20 ,  H04L1/24

摘要： In a system, device, and method for selecting a channel from among a plurality of channels, a number of available channels are selected for testing. A channel quality measurement is made for each of the number of available channels. The channel having the best channel quality measurement is then selected. To make the channel quality measurements, a primary station selects a channel to be tested and also selects a secondary station with which to perform the test. The primary station transmits a control frame to the selected secondary station, including a channel identifier identifying the selected channel. Upon receiving the control frame, the selected secondary station adjusts its transmitter to the selected channel based on the channel identifier in the control frame, and transmits a reference signal on the selected channel. Meanwhile, the primary station adjusts its receiver to the selected channel and receives the reference signal from the selected secondary station. The primary station then measures the quality of the received reference signal.

摘要翻译： 在用于从多个频道中选择频道的系统，设备和方法中，选择多个可用频道用于测试。 对每个可用频道进行信道质量测量。 然后选择具有最佳信道质量测量的信道。 为了进行信道质量测量，主站选择要测试的信道，并且还选择用于执行测试的辅助站。 主站向所选择的次站发送控制帧，包括标识所选频道的信道标识符。 在接收到控制帧时，所选择的副站基于控制帧中的信道标识符将其发射机调整到所选择的信道，并在所选择的信道上发送参考信号。 同时，主站将其接收机调整到所选择的信道，并从所选择的副站接收参考信号。 主站然后测量接收到的参考信号的质量。

公开(公告)号：US5274697A

公开(公告)日：1993-12-28

申请号：US20897

申请日：1993-02-22

申请人： Stephen Schroeder ,  Manickam R. Sridhar

发明人： Stephen Schroeder ,  Manickam R. Sridhar

IPC分类号： H04B1/74 ,  H04M11/06 ,  H04M11/00

CPC分类号： H04B1/74 ,  H04M11/06

摘要： Automatically restoring data transmission by monitoring line degradation and switching to a new line (or lines) when line quality falls below a prescribed standard. Data transmission is maintained on the leased line while communication is being established on the dial line, so as not to disrupt data transmission; communication is established across two dial lines to restore full-duplex transmission; energy is maintained on the dial lines at times when data is not being transmitted to prevent a change of channel on a dial line; a signal processor, associated memory, and analog interface circuitry provide the data restoral functions; control of the restoral procedure is handled by one modem (e.g., the calling modem), and commands are sent to the other modem over either the leased or dial lines.

摘要翻译： 当线路质量低于规定标准时，通过监控线路衰退并切换到新线路（或线路）来自动恢复数据传输。 在拨号线上建立通信时，在专线上保持数据传输，以免中断数据传输; 通信建立在两条拨号线路之间，以恢复全双工传输; 在不传输数据的情况下，在拨号线上保持能量，以防止拨号线上的频道改变; 信号处理器，相关存储器和模拟接口电路提供数据恢复功能; 由一个调制解调器（例如，呼叫调制解调器）处理对恢复过程的控制，并且通过租用或拨号线路将命令发送到另一个调制解调器。