Study On Consistent Information Modeling Of Heart Sound Telemonitoring Architecture

With the urgent demand for daily monitoring and early prevention of cardiovascular diseases,Heart Sound Monitor(HSM)has been gradually used in home or outdoor environment in recent year to self-assessment and remote monitoring of the cardiac function,which forms the end-to-end telemonitoring architecture composed of HSMs,Gateways,and healthcare information systems.Currently,research teams or vendors have proposed their own solutions for this end-to-end transmission architecture by means of various network communication technologies,and are used for telemonitoring applications for different groups of people and scenarios.However,these solutions all have problems with data heterogeneity,interface privatization,and information security problems,making it difficult for heart sound data to be securely shared in the architecture and effectively integrated into healthcare information systems,which hinders the scale development of heart sound telemonitoring services.For the informatization problem of the heart sound telemonitoring architecture,it can be further analyzed that its informationization requirements are consistent data semantic,uniform message syntax,and network security considerations of each network interface under the OSI reference model from the perspective of interface type and network interconnection.Hence,this paper proposes to perform the consistent information modeling for the heart sound telemonitoring architecture,that is to build the entire protocol stack model of each network interface from the aspects of information semantic model,message exchange framework and network security mechanism while maintaining the interface relevance within a system perspective,so as to ensure the collaborative work between heterogeneous systems and achieve the end-to-end semantic consistency,and enables heart sound data to be securely shared and seamless integrated in the architecture.Focus on the actual data demands and behavior patterns,and based on the communication characteristics of the underlying technology,this paper deeply analyzes the core design elements of consistency information modeling from the perspective of methodology by means of the mainstream standardized modeling framework and using this as a design basis the implementation method of this paper is proposed: Firstly,the common information characteristics and communication behavior of heart sound monitor are extracted through literature investigation to abstracting the conceptual model as the theoretical support and target object of modeling.For the General Device Interface modeling,combined with high-bandwidth transmission characteristics of lower-layers provided by Bluetooth,USB,Zigbee and other,IEEE 11073-20601 interoperability framework is selected as the semantic and syntax modeling basis of upper-layers to design domain information model(DIM),service model,communication model and transport layer security mechanism.For the Lightweight Device Interface modeling,combined with low-bandwidth transmission characteristics of lower-layers provided by BLE,Bluetooth GATT Profile service framework is selected as the semantic and syntax modeling basis of upper-layers to design characteristic,service,and profile,and establish a normalized conversion relationship with the domain information model to provide consistent semantic input for the service interface.For the Service Interface,combined with lower-layers provided by TCP/IP protocol and SOAP/hData webservice,IHE-PCD technical framework is chosen as the semantic and syntax modeling basis of upper-layers to design the PCD-01 message model in the cross-interface domain information model mapping and security mechanism considerationsBased on the implementation method mentioned above,the consistency information modeling of the heart sound telemonitoring architecture is completed.In the conceptual model of heart sound monitor,the information characteristics include heart sound physiological parameters such as phonocardiogram,ratio of S1 and S2 amplitude,ratio of diastolic and systolic duration,and heart rate and contexts related to these parameters and device,the communication behavior is classified into three types of transmission services: real-time transmission,storage transmission and remote control.For the General Device Interface model,the objects of DIM implements a consistent semantic representation of information characteristics and transmission service features,and the service model and communication model provide the message framework and behavior constraints with unified syntax,and finally the necessary security mechanism is provided from the transport level.For the Lightweight Device Interface model,the characteristics implement a consistent semantic representation of information characteristics and transmission service features,and the service and profile provide the message framework and behavior constraints with unified syntax,finally,the design of connection optimization and security mechanism is completed based on the characteristics of low-layers.Further,the mapping of the information characteristics related Characteristics to the DIM is completed,and the semantic unification at the device interface is realized.For the Service Interface model,the behavior abstraction is completed through the interaction model design,the semantic and syntax of the information characteristics is uniformly defined and the semantic consistency of the cross-interface is established by the design of the OBX segments,finally,the security mechanism of the interface is provided from the aspects of transport layer encryption,auditing,entity identity assertion.Eventually,based on the mainstream use cases,each network interface model and the simulated transmission application of heart sound data under this architecture model is realized by software programming,and the feasibility and validity of the consistency modeling method and design results proposed in this paper are preliminarily verified.The research results provide reference for the information standard of heart sound telemonitoring architecture,and also form the solution and methodology for consistency information modeling of the end-to-end transmission architecture for personal health devices.In addition,the research results of this paper have been submitted to the corresponding IEEE International Standards Development Project as a preliminary draft to support the completion of standard establishment.