Thus, the system is able to determine that the patient is in the
vicinity, and alerts the patient to take the required medicines via a buzzer. The Patient
Mote software is described in Section 17.4.2.3.
17.4.1.3 Base Station Subsystem
This subsystem is shown in Figure 17.6. The Base Station Mote provides message relay to
the Base Station PC. The Base Station PC is a PC running a Linux operation system and it
is re-designed from the ?¬?rst phase to accommodate our application. The Base Station
software tasks include simulating a display and its GUI for the patient; determining
FIGURE 17.5
Patient monitoring subsystem.
A Prototype on RFID and Sensor Networks for Elder Health Care 319
when medicine is required; and maintaining various interactions between the Medicine
Mote and Patient Mote. The Base Station Mote software is described in Section 17.4.2.1.
17.4.1.4 System Component Con?¬?guration
Next, we describe major interactions among the seven system components, as shown in
Figure 17.7. As explained before, motes are mainly used for communicating readers from
RFID readers to the control system. The Medicine Mote communicates with the HF RFID
reader and weight scale to monitor HF tags and medicines weight. (Recall that each HF
RFID tag identi?¬?es a medicine bottle.) The Patient Mote communicates with the UHF RFID
FIGURE 17.6
Base station subsystem.
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