Patent ID: 6868097
Filing Date: 2005-03-15
Classification: H04J

Abstract:
1. A communication network comprising: a master device and a plurality of slave devices connected to each other through at least one multiplexer in a tree configuration with the master device at the vertex for transmitting and receiving various types of specific information having a fixed length to and from each ones of the plurality of slave devices; wherein said master device specifies any of the slave devices via the multiplexer according to a round-robin polling order, the multiplexer includes a master destined information selecting unit and then the specified slave device transmits the specific information for starting communications with the master device, the specific information being used for matching the sampling time in said master device and executes specific calculations according to the specified information for returning said specific information from said master device according to the specific information for starting; wherein the delay time in transferring the specific information from the slave device through the at least one multiplexer to the master device and vice versa is controlled by the master destined information selecting unit so that the delay time is substantially constant from each relay point within the at least one multiplexer.