RAPID POLLING METHOD FOR DIGITAL COMMUNICATIONS NETWORK

摘要

All of the remote stations to be rapidly polled are connected in a series loop with the control station, which transmits a rapid polling word containing several information bits followed by a marker bit. Each remote station, while retransmitting the word to the following station in the loop, advances the marker one or more bit positions and inserts its own status information in those positions. The remote stations recognize a full word by the position of the marker and ignore it. The remote stations may also be programmed to alter error checking parity bits in accordance with the alterations made in the information bits.