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Long transactions, high concurrency, and frequent activity situations occur in many areas. The intermediate process of long transactions in the process of execution is more, in the process, therefore, can not avoid frequent access to the data, the system overhead of the data access process is relatively large, which reduces the efficiency of the system and increase the pressure of the server. The...
The diversity of wireless networks and protocols used by Internet of Things makes solutions non-interoperable. Moreover, some Things are not always able to communicate due to resource constrains or environmental factors. In this paper, those issues are addressed by introducing the concept of virtual Things. It means that each real Thing is virtualized in a local server or in the cloud, enabling communication...
Middleware in Internet of Things ecosystem plays an important role. Its role is to hide the complexity of connected devices and to provide services to domain-oriented applications that ease the development and support of these applications. Middleware should be able to work with the devices using different protocols, data models and terms. In this paper we describe a middleware, called SemIoT Platform,...
With the development of the Internet of things, more and more sensors appear in our lives. However, at present these sensors are mostly working in isolation. If sensors that have similar or overlapped function can be linked to work together, we can greatly increase the scope and accuracy of perception. This article mainly focuses on the research and implementation of collaborative linkage mechanism...
In the recent decades, Internet of Things (IoT) is becoming much more popular than ever. The sensors in IoT are becoming heterogeneous and abundant. It is necessary to implement a middleware platform to deal with the tremendous growth in the number and variety of sensors. In this paper, we design and implement a modularized and dynamic platform based on OSGI framework to deal with the vast heterogeneous...
In mobile communication, spatial queries pose a serious threat to user location privacy because the location of a query may reveal sensitive information about the mobile user. In this paper, we study k nearest neighbor (kNN) queries where the mobile user queries the location-based service (LBS) provider about k nearest points of interest (POIs) on the basis of his current location. We propose a solution...
At a time when socialism as an economic option is variously questioned, very few people are against social instances of our life such as entertainment, customer assistance, and so on. This happens with the management of many things accompanying our life as well. We can find both the reason and the evidence for the viability of this trend in one very basic fact: things are social because they work...
The identification process in network environments consists of knowing who is using a resource in order to aggregate security, integrity and control to it. However, the diversification of resources in such environments implies a set of credentials for the same user as well as the requirement of authentication as many times as the resources have to be accessed. In this context, Squid is an interesting...
The paper describes the overall design and implementation of the geographically distributed computing and data storage centre as built by the Nordic Data Grid Facility (NDGF) with the driving goal to serve the needs of the Large Hadron Collider research at CERN. In striving to federate heterogeneous resources in different administrative domains, NDGF chose to create an infrastructure using software...
This paper designs a database middleware based on TCP/IP protocol. By the system validating of C/S structure on the service end, it solves the data secure problem of client connection configuration. With further study, it realizes the separation of client connection and database connection, and forms three-tie structures. Therefore it can expand applications to the Internet network. A client connection...
This paper reviews three kinds of information exchanging technology in the distributed computing environment, and introduces message-oriented middleware to implement the integration of todo-list distributed in the different business applications. Based on the analysis of the architecture and implementation framework of message-oriented middleware, the paper discusses the enterprise application integration...
In this paper we present a distributed event driven middleware architecture for situational awareness and intelligent decision making for command and control of geographically distributed networked battlefield agents. We tackle the important and challenging issues of distributed agents scheduling, synchronization, load balancing, and terrain database distribution/management/allocation in a distributed...
Even though smart home technology is becoming more common, there has been little research about upgrading existing systems; yet, as smart homes become more common, the coexistence of different technologies is to be expected. To study these issues, we have updated our previous smart home architecture to support our service discovery enabled EPIS network protocol. The new middleware is designed to enable...
Ambient Assisted Living technologies try to integrate intelligent assistance-systems in elder people's homes to maintain a high degree of independence, autonomy and dignity. To speed up the development process and to make the applications more adaptive and flexible to special user needs as well as to ensure compatibility throughout systems a common middleware with standardized interfaces is desirable...
Cloud computing has been extremely tropical in the past few years. Both academic and industrial people have shown great interest in this area. Platform as a Service, which is the core application of cloud computing technologies, has got much attention as well. In this article, from the basic concept of PaaS, we analyze the basic characteristics of PaaS, and describe the current research status. Also...
This paper proposes a downloadable service discovery system compatible with the current deployed EPG applications based on DVB-SI for program guide. The SD&S (Service Discovery and Selection) and BCG (Broadband Contents Guide) are the xml-based standards approved by ETSI to deliver metadata of digital broadcasting services over broadband networks. The SD&S/BCG has been strongly recommended...
RFID technology is considered as one of the most influential information technologies, since the transmission between reader and other equipments is completely opened through wireless channel, this has potential risks. This paper analyzes RFID system's hidden danger, designs an RFID authentication protocol based on shared key and proves its advantages compared with the other protocols. In order to...
Common solutions to database replication use a single replication protocol. This approach lacks flexibility for changing scenarios or when dealing with heterogeneous client application requirements. Our proposal is a metaprotocol that supports several replication protocols which may follow different replication techniques or provide different isolation levels. With our metaprotocol, replication protocols...
Under the design background of MES and seamless integration for the ERP, which should meet cross-platform interface for service of process real-time interactive data, limited network bandwidth, data capacity, and data complicated to operate, the idea of ldquomiddlewarerdquo was proposed in this paper. Then ldquoInterface middlewarerdquo, ldquoboth- sides- designrdquo concept and design of the interface...
The interplanetary overlay network (ION) software at JPL is an implementation of delay/disruption tolerant networking (DTN) which has been proposed as an interplanetary protocol to support space communication. The JPL deep impact network (DINET) is a technology development experiment intended to increase the technical readiness of the JPL implemented ION suite. The DINET experiment operations center...
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