Generally refers to control signals that are transmitted within the same packets or carrier frequency as the data. See signaling in/out of band.
"in band." YourDictionary, n.d. Web. 15 August 2018. <http://www.yourdictionary.com/in-band>.
in band. (n.d.). Retrieved August 15th, 2018, from http://www.yourdictionary.com/in-band