Architecture And Service Access Of Smart Hospital Based On Internet Of Things

The popularity of HIS (hospital information system) has made the hospital achieve certain degree of informatization. Nevertheless, it also has some deficiencies, such as complex process of out-patient service, poor information sharing of each department, the patient medical information unable to be real-time read and inputted when doctor ward rounds, unable to obtain the detailed distribution information of medicine purchased in the hospital and so on. Smart hospital, based on technology of IOT (Internet of things) and constructed with the vector of various application service systems, is a new kind of hospital integrated the functions of diagnosis, treatment, management and decision, which has provided a new technical means to solve the problems mentioned above. In this dissertation, we choose smart hospital as the research object and have specific research on its architecture and service access, and it is not only of great significance in the application, construction and extension of smart hospital, but also promotes the application of IOT technology in the medical field. The main works of the present dissertation are as follows:(1) Detailed analysis and discussion on the application of IOT technology in the medical field are conducted in order to lay the foundation for the subsequent studies on smart hospital. Firstly, the research status of applying the technology of IOT to medical domain, such as drug, telemonitoring, medical informatization and the management of medical equipments, is detailedly investigated.,Furthermore from the concept of smart hospital, its relation with IOT in society, its difference and relation with information-based hospital, intelligent hospital and digital hospital, the connotation of smart hospital is analyzed, and then future application system of IOT in medical industry is described and prospected.(2) The architecture of smart hospital based on IOT is built and the specific application scheme is given, providing significant reference for the comprehensive implementation and extension of smart hospital in the future. Firstly, on the basis of current architecture of IOT, combined with the characteristics of the scene in hospital, the specific architecture of smart hospital is discussed in detail, and then from compiling the information codes and standards, building an unified network platform and an embedded mobile electronic medical record application platform, the key technologies and contents in the construction of smart hospital are fully studied. Finally, taking a third grade A hospital as an example, an specific application scheme of smart hospital is given from the aspects of the design of logic structure, the design of application framework, the construction of basic network environment and so on.(3) With the distribution management of purchased medicine in smart hospital as the breakthrough point, on the basis of EPC architecture commonly used in medicine domain and integrated WSN technology, an IOT model of medicine distribution integrated RFID and WSN is built and the medicine distribution in IOT environment is detailedly analyzed, providing full protection and support for application services in smart hospital. The structure and formal description of this model are defined, then the description method of state information and the process information in the medicine distribution, the storage method of distribution information are given based on the description of this model, and also the tracking process of medicine distribution information is modeled by Petri nets. Finally, the prototype system of the management of medicine distribution is given and the information acquisition and transmission process of medicine distribution in this system is discussed in detail based on the building of its function construction, showing the feasibility and effectiveness of this model applied in the distribution management of purchased medicine in smart hospital.(4) A service description model of IOT based on WSDL is proposed and the core services in smart hospital are completely described by this model. Firstly, in view of the actual characteristics of IOT services description, the services contents needed to be extended based on the traditional description model of web service named WSDL are analyzed, including the expansion based on the description objects and contents. Furthermore the expansion level and concrete structure of this model are given,and the physical objects of the service have been extended by the description of the role and its attributes involved in the IOT services, and the description contents of service have also been extended by the description of service acquisition method, service running prerequisite, service inputs and outputs, sub procedure and its flow in service, service sustaining and so on. Then the implementation of this model is discussed, choosing OWL language for the formal description of this model, and the detailed description of the core services in smart hospital, respectively named outpatient service and inpatient service, is completed by this model.(5) A RBAC model of IOT based on user groups and context is constructed and the access control to smart hospital’s services in IOT environment is analyzed. Firstly, the context information of IOT environment is modeled and the relevant contents such as context condition and context rules are formal described. Furthermore, on the basis of the traditional RBAC model, a RBAC model of IOT based on user groups and context is proposed, the authorization and modification of roles achieved by introducing user groups and the constraint conditions extended by adding the context constraint rules when user (group) granted role and role granted permission, and then the design idea and the composition and running mechanism of this model are detailedly discussed. Finally, by this model the access control to smart hospital’s services in IOT environment is analyzed and the specific meaning of all the basic elements and their relationships in this model applied in the services access of smart hospital is discussed, improving the flexibility and security of service access in smart hospital.