  In this paper, transmission scheduling for multiloop wireless networked
control systems sharing the wireless channel is considered. A linear quadratic
cost offset has been proposed to evaluate the performance gap induced by the
nonideal communication. A functional relationship between linear quadratic
offset metric and Age of Information has been built up. Based on the offset
metric, we come up with an age-based scheduling policy and numerical
simulations show that there is a significant improvement compared to the former
work.
