Figure 2.5 is a simplified diagram of a remote monitoring system. A patient wears a
ZigBee device that interfaces with a sensor, such as a blood pressure sensor, that gathers
the information on a periodic basis. Then this information is transmitted to a ZigBee
gateway. A ZigBee gateway provides the interface between a ZigBee network and other
networks, such as an Internet Protocol (IP) network. The patient information is then
transmitted over the Internet to a personal computer that the physician or nurse uses to
monitor the patient. This system could help hospitals improve patient care and relieve
hospital overcrowding by enabling them to monitor patients at home.