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Internet of vehicles (IoVs) emerges as a promising technology to facilitate vehicular wireless communication by approving vehicle-to-everything (V2X) services for intelligent transportation systems including vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I) and vehicle-to-pedestrian (V2P) services. V2V networks have been rapidly developed to support short distance data transmission among vehicles...
Cloud computing has gained popularity in recent years due to its pay-as-you-go business model, high availability of services, and scalability. Service unavailability does not affect just user experience but is also translated into direct costs for cloud providers and companies. Part of this costs is due to SLA breaches, once interruption time greater than those signed in the contract generate financial...
Programmable Logic Controllers (PLCs) are specialized computing systems for the control and monitoring of distributed industrial devices. Aiming for a highly connected industrial Internet-of-Things (IoT) ecosystem, PLCopen OPC Unified Architecture (UA) specification has been released. This paper presents the implementation and evaluation of a PLCopen OPC-UA software component for industrial control...
Heterogeneity in constrained networks and gateways is perhaps one of the single greatest challenges facing end-to-end management of devices and networks in the IoT. Today, the Lightweight M2M (LWM2M) protocol, leveraged on open Internet standards, has become a strong contender for REST-based IoT management. However, significant challenges exist for remote gateway management, particularly for proxies...
Data exchange is a critical issue within the multi-disciplinary engineering process of cyber physical production systems (CPPS). AutomationML (AML) is an emerging standard in the this field to represent and exchange artifacts between heterogeneous engineering tools used in mechanical, electrical, and software engineering domains. However, the interoperability of different exchange standards may be...
Engineering projects are driven by cost and time constraints. Furthermore, the increasing complexity of these projects makes it necessary to expose specification, implementation and conceptual errors as early as possible. Therefore, a well-established method is to carry out simulation experiments. This paper presents a concept for coupling already existing (domain-specific) simulation models that...
In cloud computing, the paradigm of data outsourcing introduces security challenges, which requires an independent auditing service to check the data integrity in the cloud. Many existing integrity checking protocols cannot be applied to the auditing service because they can only deal with static data, but it is natural for the client to dynamically update their remotely stored data. Thus, an efficient...
Many Software-Defined Networking (SDN) controllers support a “northbound interface” by which applications can interact with the SDN controller and (indirectly) control the underlying SDN network. The absence of a standard for the northbound interface of these controllers makes it difficult for application developers to create interoperable/portable code (i.e., code that works with any SDN controller)...
Software Defined Networking (SDN) became a popular concept where a flexible network architecture is required. One of the widely used approaches to SDN is based on the OpenFlow (OF) protocol that allows controllers to configure OF capable network switches. The OF protocol is focused on a flow-based control of a switch. Besides OF itself, Open Networking Foundation (ONF) has introduced the OF-CONFIG...
Internet of Things is a paradigm that defines networking of various kinds of devices that are typically constrained, e.g., by limited amount of memory. Lightweight Machine to Machine (LWM2M) is a client-server protocol for managing such constrained devices. It is based on the Constrained Application Protocol (CoAP). Group communications remain undefined in LWM2M specifications, but can be supported...
Scientific simulations are moving away from using centralized persistent storage for intermediate data between workflow steps towards an all online model. This shift is motivated by the relatively slow IO bandwidth growth compared with compute speed increases. The challenges presented by this shift to Integrated Application Workflows are motivated by the loss of persistent storage semantics for node-to-node...
Condition monitoring and maintenance of devices and equipment is an important aspect of operating a production facility affecting the availability of production systems. Modern production environments can consist of thousands of devices that each need to be monitored so that maintenance can be performed when necessary to sustain a cost-effective state of production. Today operation and maintenance...
Most computer-based systems require the ability to store information continuously in order to meet life cycle requirements of the data. The simplest way to meet these requirements typically involves using a centralized data store (relational or otherwise). In this paper, we analyze these requirements as they present themselves in the Voice over IP (VoIP) field, discuss the approach proposed by the...
Due to the lack of an effective integrated information platform, there are the heterogeneous problems of electric information systems in secure access platform. This paper presents a multi-agent-based data adapter technology, and designs an adapter which can be flexibly configured with each application. The adapter is capable of adapting data models of each application in electric systems to the wanted...
Separation of data and control plane offers benefits of having programmability of the forwarding tables according to the needs of the applications. The need for efficient and effective management of network resources is crucial in providing effective control plane functionality to the applications. OpenFlow standardization efforts at Open Networking Foundation resulted in an OpenFlow Configuration...
It can improve the performance of mobile data management by caching the frequently accessed and infrequently updated data items. In this paper, a cache replacement policy called Update-based Minimal Access Cost Replacement (UMACR) was proposed to remedy the defects of the existing cache replacement policies such as GDSF and OUR. A variety of factors such as sizes of data items, data access and update...
In order to solve the problem that the information sharing and exchange lack uniform information exchange standards and information cannot be timely exchanged and shared, this paper proposes XML-based HR Information System under eterogeneous Enviornment. Simutaniously, considering the information chara1 cteristics of HR outsourcing and the related industry standards, this paper also designs the XML...
Network management is facing new challenges with the definition of the future Internet. Among those challenges, the management of network's heterogeneity represents a highly complex problem. The most popular proposals addressing this problem following RFC 3139 guidelines, translate from mid-level independent representations to the network's services and devices heterogeneous management interfaces...
Configuration validation is a crucial requirement for dynamic reconfiguration effectiveness. This short paper presents a validation-purpose configuration language which can be used to model a system's configuration reference model which includes structural and operational validity constraints.
Service Oriented Architecture (SOA) is more popular than ever in a lot of different application domains. Initially used only at the enterprise level this approach is now spreading to the other layers down to the device level. In this context, the interoperability between the systems and the devices communicating across all domains and layers has to be particularly well defined. This interoperability...
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