\input zb-basic \input zb-ioport \iteman{io-port 00007233} \itemau{Liou, Luen-Woei; Ray, A.} \itemti{Integrated communication and control systems. III: Nonidentical sensor and controller sampling.} \itemso{J. Dyn. Syst. Meas. Control 112, No.3, 357-364 (1990).} \itemab Summary: Networking in Integrated Communication and Control Systems (ICCS) introduces randomly varying delays which degrade the system dynamic performance and are a source of potential instability. In Part I [the second author and {\it Y. Halevi}, ASME J. Dynamic Systems, Measurement and Control 110, 367-373 (1988)] of this sequence of papers we developed a discrete-time, finite-dimensional model of the delayed control system for analysis and design of ICCS where the sensor and controller have identical sampling rates. In Part II [ibid. 110, 370-374 (1987)] we proposed two alternative approaches for ICCS design, namely, identical and nonidentical sampling rates for sensor and controller. This Part III presents extended modeling of ICCS for nonidentical sensor and controller sampling rates. This model is also suitable for analyzing tracking problems, i.e., control systems with time-dependent reference inputs. \itemrv{~} \itemcc{} \itemut{nonidentical sensor and controller sampling rates; tracking problems; control systems with time-dependent reference inputs} \itemli{doi:10.1115/1.2896152} \end