In Chap. 2, a dynamic ETS based on a common triggering condition is utilized to determine the transmission of measurement output, where all components of measurement output are simultaneously transmitted when the triggering condition is satisfied. This means that the ETM requires to collect signals from all sensors and then these signals are judged and transmitted simultaneously. In practice, sensor nodes may be distributed in different geographical locations, which makes it difficult for the common event triggering mechanism to obtain the data of all sensor nodes at the same time. On the other hand, the data of different sensor nodes have different physical meanings, the design of independent triggering threshold for each sensor node is more in line with the actual situation. Besides, by designing triggering threshold for each sensor node independently, unnecessary transmission of some node signals can be avoided.