Patent ID: 9614744
Date: 2017-04-04
CPC Classifications: H04L

Claim:
1. A method for the time-correct monitoring of Time Triggered Ethernet (TT) messages transmitted by a Time Triggered Ethernet (TTEthernet switch) in a distributed real-time computer system including at least the TTEthernet switch and a monitoring node where the TTEthernet switch includes a plurality of communication channels and at least one monitoring channel, wherein the TTEthernet switch has a global time with the precision P and the accuracy A, and wherein the TTEthernet switch contains a selection data structure, where the selection data structure indicates each TT message class to be monitored wherein each TT message class is identified by an offset and a scheduled period, the method comprising: detecting a TT message of a TT message class to be monitored in the TTEthernet switch using the selection data structure based on an offset of the TT message and the time of transmission, generating a copy of the TT message in the TTEthernet switch, sending the copy of the TT message from the TTEthernet switch via one of the at least one monitoring channels to a monitoring node, and autonomously sending an Ethernet (ET) message containing an identifier and the exact time of transmission of the TT message via one of the at least one monitoring channels from the TTEthernet switch to a monitoring node subsequent to sending the copy of the TT message.