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Petri Nets provide a graphical notation for modeling systems and performing analysis. Colored Petri Nets (CPNs) combine the strengths of ordinary Petri Nets with a high level programming language, making them more suitable for modeling large systems. A CPN model is an executable representation of a system that can be analyzed through simulation. CPN models are built using CPN Tools, a graphical software...
The Session Initiation Protocol (SIP) together with its extension for presence and messaging is considered to be an enabler of converged communications. At the core, SIP is a signaling protocol used for establishing sessions in an IP network. SIP has been adopted by 3GPP for multimedia streaming services in cellular networks. This paper presents a formalized and executable Colored Petri Net model...
Many businesses as well as government enterprises are moving towards service oriented architectures for their operation. The level of complexity, interaction and interdependence among various components make it difficult to design, develop, and analyze such systems as a whole. In particular it is difficult to foretell the effect of proposed changes and to evaluate alternative architectures. Adoption...
The concurrency, communications, resource constraints, and quality of service attributes are distinguishing features of Web services. Assessment and determination of impact of the nonfunctional aspects such as service granularity, governance, composition, and orchestration is an overarching concern and this exercise should be carried out at the architecture design stage rather than post implementation...
This paper describes a number of new system of systems engineering (SoSE) issues that must be addressed in order to design and deploy a safe, secure, and private informatics infrastructure for remote patient monitoring systems that are interoperable with the emerging U.S. National Healthcare Information Network (NHIN). Motivations for NHIN's ambitious remote patient monitoring goals - such as reducing...
Service oriented architectures (SOAs) are rapidly becoming an accepted means of providing network information exchange across a heterogeneous fabric of nodes. Given the complexity of such architectures and multiple levels of system interactions, creating a valid and usable SoS model for SOA application using a single technique that captures the desired level of details can be a daunting task. In this...
This paper describes the emerging US National Healthcare Information Network (NHIN). Scheduled to be completed for the US Department of Health and Human Services (DHSS) by 2014, the NHIN will be a complex system of systems information network built up from consumer, physician, hospital, and regional healthcare information organizations (RHIOs). The advantages and disadvantages of NHIN's RHIOs are...
The emerging national healthcare information network (NHIN) is intended to improve the efficacy, efficiency, and safety of healthcare. At the same time. Service oriented architectures (SOAs) are rapidly becoming an accepted means of providing network information exchange across a heterogeneous fabric of node, and may be suitable for a next-generation NHIN-2s. Given the complexity NHIN and SOA due...
Hospitals and manufacturers are designing and deploying the IEEE 802.x wireless technologies in medical devices to promote patient mobility and flexible facility use. There is little information, however, on the reliability or ultimate safety of connecting multiple wireless life-critical medical devices from multiple vendors using commercial 802.11a, 802.11b, 802.11g or pre-802.11n devices. It is...
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