公开(公告)号：US5267244A

公开(公告)日：1993-11-30

申请号：US789348

申请日：1991-11-08

申请人： David G. Messerschmitt ,  Christopher Flores ,  Hulhung Lu

发明人： David G. Messerschmitt ,  Christopher Flores ,  Hulhung Lu

IPC分类号： H03M5/14 ,  H03M13/31 ,  H04L25/49 ,  H04M1/725 ,  H04B7/212

CPC分类号： H04M1/72502 ,  H03M13/31 ,  H03M5/145 ,  H04L25/4908

摘要： In a wireless communication system between a base unit and a remote unit, the base unit transmits periodically a sync signal in a first selected time period in a selected frequency channel. The remote unit scans the frequency channels to detect the sync signal. The remote unit transmits a response signal in the selected frequency channel. The response signal is transmitted in a second selected time period different from the first selected time period. In addition, the remote unit transmits a first control signal encoded by a first code in the selected frequency channel in a third selected time period, different from the first and second selected time periods, containing a set of functional capabilities of the remote unit. The base unit receives and decodes the first control signal to derive the set of functional capabilities of the remote unit and compares it to its own set of functional capabilities to determine a common set of functional capabilities. The base unit transmits a second control signal encoded by the first code in the same selected frequency channel in a fourth selected time period containing the common set of functional capabilities. Thereafter, communication between the base unit and the remote unit is based upon a functional capability selected from the common set.

摘要翻译： 在基本单元和远程单元之间的无线通信系统中，基站单元在所选择的频率信道中的第一选定时间周期内周期性地发送同步信号。 远程单元扫描频道以检测同步信号。 远程单元在所选择的频道中发送响应信号。 响应信号在与第一选择的时间段不同的第二选定时间段内发送。 此外，远程单元在与包含远程单元的一组功能能力的第一和第二选定时间段不同的第三选定时间段内发送由所选频道中的第一代码编码的第一控制信号。 基本单元接收并解码第一控制信号以导出远程单元的一组功能能力，并将其与其自己的一组功能能力进行比较，以确定一组共同的功能能力。 基站单元在包含公共功能能力集合的第四选定时间段内发送由相同选定频道中的第一代码编码的第二控制信号。 此后，基本单元和远程单元之间的通信基于从公共集合中选择的功能能力。