Some studies , , ,  have addressed IoThNet platform issues. Although these studies have not provided a comprehensive and generalized analysis of such models, some design issues are noteworthy in specific cases. A semantic platform architecture is introduced in . This architecture offers semantic interoperability across heterogeneous systems and devices and provides user 682 VOLUME 3, 2015
S. M. R. Islam et al. : Internet of Things for Health Care: A Comprehensive Survey FIGURE 9. The auto-configuration protocol in V2I scenario. FIGURE 10. A functional framework of a health information service model. environments and domotic devices with some semantic capability. Its semantic layer can support four types of ontologies. III. IoT HEALTHCARE SERVICES AND APPLICATIONS IoT-based healthcare systems can be applied to a diverse array of fields, including care for pediatric and elderly patients, VOLUME 3, 2015 683
S. M. R. Islam et al. : Internet of Things for Health Care: A Comprehensive Survey FIGURE 11. Platform interfaces (a) without standardization (b) with standardization. the supervision of chronic diseases, and the management of private health and fitness, among others. For a better under- standing of this extensive topic, this paper broadly catego- rizes the discussion in two aspects: services and applications. Applications are further divided into two groups: single- and clustered-condition applications. A single-condition appli- cation refers to a specific disease or infirmity, whereas a clustered-condition application deals with a number of dis- eases or conditions together as a whole. Fig. 13 illustrates this categorization. Note that this classification structure is framed based on today’s available healthcare solutions using the IoT. This list is inherently dynamic in nature and can be easily enhanced by adding additional services with distinct features and numerous applications covering both single- and clustered-condition solutions. This section introduces each of the services and applications shown in the figure. A. IoT HEALTHCARE SERVICES The IoT is anticipated to enable a variety of healthcare services in which each service provides a set of healthcare solutions. In the context of healthcare, there is no standard definition of IoT services. However, there may be some cases in which a service cannot be objectively differentiated from a particular solution or application. This paper proposes that a service is by some means generic in nature and has the potential to be a building block for a set of solutions or applications. In addition, it should be noted that general ser- vices and protocols required for IoT frameworks may require slight modifications for their proper functioning in health- care scenarios. These include notification services, resource- sharing services, internet services, cross-connectivity protocols for heterogeneous devices, and link protocols for major connectivity. The easy, fast, secure, and low-power discovery of devices and services can be added to this list.
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