3. System Architecture
Figure 1 gives an overview of the overall system architecture and system components of the proposed
ubiquitous health monitoring system using mobile Web services. The dashed links represent a future extension
to the system to enable caregivers to communicate with hospitals and healthcare canters concerning the
patient. A mobile Web service hosted on a patient’s mobile device is the core of the system, which achieves
interoperability and cross-platform integration with different applications. TheWeb service collects the data
from the sensors attached to the patient’s body in order to measure parameters of interest. The Web service
can process the data locally and send reports, if sufficient resources are available on the host device, or relay row data for remote processing. The patient is able to control who access the data and how the data is being
accessed. At the other side, caregivers can communicate with the system using a native mobile interface or
a standard Web browser.