Medical device control system having a medical device system, wherein the medical device system comprises: at least one medical device having a WLAN transmitting module and at least one mobile control unit for a medical device , having a WLAN transmitting module , at least three WLAN access points respectively having at least one antenna, at least one further radio reading module , and a control device joined to one of the at least three WLAN access points and to the at least one further radio reading module , wherein the at least one medical device can be controlled by means of the mobile control unit , the WLAN access points are configured to detect a strength of a signal of the at least one WLAN transmitting module , the control device comprises a memory area for datasets of signal strength combinations for individual positions of the at least one medical device and the at least one mobile control unit , the control device comprises a memory area for data sets of a map including a top view of an area in which the signal strength combinations are detected, the detected area comprises rooms in a building area and an area outside the rooms , and one single WLAN access point is respectively provided in the rooms and a single WLAN access point is provided in the area outside the room , and the control device is configured to determine by means of the stored data sets whether a currently detected position of the at least one medical device and of the at least one mobile control unit is inside or outside of one of the rooms and in which room , so that a presence of the medical device and of its control unit in a room of the building area can reliably be determined, wherein the at least one medical device comprises a further radio transmitting module and the at least one mobile control unit for a medical device comprises a further radio transmitting module , and the at least one further radio reading module is configured to detect a strength of a signal of the at least one further radio transmitting module . at least one medical device having a WLAN transmitting module and at least one mobile control unit for a medical device , having a WLAN transmitting module , at least three WLAN access points respectively having at least one antenna, at least one further radio reading module , and a control device joined to one of the at least three WLAN access points and to the at least one further radio reading module , wherein the at least one medical device can be controlled by means of the mobile control unit , the WLAN access points are configured to detect a strength of a signal of the at least one WLAN transmitting module , the control device comprises a memory area for datasets of signal strength combinations for individual positions of the at least one medical device and the at least one mobile control unit , the control device comprises a memory area for data sets of a map including a top view of an area in which the signal strength combinations are detected, the detected area comprises rooms in a building area and an area outside the rooms , and one single WLAN access point is respectively provided in the rooms and a single WLAN access point is provided in the area outside the room , and the control device is configured to determine by means of the stored data sets whether a currently detected position of the at least one medical device and of the at least one mobile control unit is inside or outside of one of the rooms and in which room , so that a presence of the medical device and of its control unit in a room of the building area can reliably be determined, wherein the at least one medical device comprises a further radio transmitting module and the at least one mobile control unit for a medical device comprises a further radio transmitting module , and the at least one further radio reading module is configured to detect a strength of a signal of the at least one further radio transmitting module . <EOS>