公开(公告)号：US5297144A

公开(公告)日：1994-03-22

申请号：US643875

申请日：1991-01-22

申请人： Sheldon L. Gilbert ,  Carolyn L. Heide ,  Dennis L. Director

发明人： Sheldon L. Gilbert ,  Carolyn L. Heide ,  Dennis L. Director

IPC分类号： H04L12/28 ,  H04L12/403 ,  H04L12/56 ,  H04J3/16

CPC分类号： H04W74/06 ,  H04W28/26 ,  H04W72/04

摘要： A wireless data communications network having a number of users communicating from individual remote stations to a central station over a single optical-infrared channel utilizing a two-stage noncontention-based multiple-access communications protocol. During the first stage of the reservation-based polling protocol, the central station provides a synchronization signal to the remote stations to define the start of a "reservation request period," and allocates fixed time slots during which any remote station having a data message to transmit may request access and reserve a portion of the channel for their data messages. During the second stage or "polled data transfer period," the central station polls only those remote stations that have a data message to transmit and have requested access to the channel. In response to the poll, the polled remote stations transmit their data message in their previously-reserved data slots. If desired, the central station may also return an acknowledgement signal to the remote stations upon successful reception of each data message.

摘要翻译： 一种无线数据通信网络，其具有多个用户，通过使用基于两阶段非接触的多址通信协议，通过单个光学红外信道从各个远程站到中心站进行通信。 在基于预约的轮询协议的第一阶段期间，中心站向远程站提供同步信号以定义“预留请求周期”的开始，并且分配固定的时隙，在该时间段期间，具有数据消息的任何远程站到 发送可以请求访问并保留信道的一部分用于其数据消息。 在第二阶段或“轮询数据传输周期”期间，中心局仅轮询那些具有要发送的数据消息并已请求访问该信道的远程站。 响应于轮询，被轮询的远程站在其先前保留的数据时隙中发送其数据消息。 如果需要，在成功接收每个数据消息后，中心站还可以向远程站返回确认信号。