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Nowadays Multi-Party computation (MPC) is a big challenge in cryptography theory that has a potential power to solve the real-life problems. But there is no much practical implementation of MPC. In this paper, we have represented a new robust algorithm for counting the respondent's votes on an electronic poll with ensuring the confidentially of their votes. The algorithm shows the extremely good response...
In this paper, ZigBee technology is used to build a home network, ??Clinux system platform is used to build an embedded Web server, Boa, so that the remote PC can access to the embedded Web through a browser, to achieve remote monitoring. This paper is mainly to achieve the software design of home monitoring system, including the operating system migration, the embedded Web server configuration, HTTP...
In this project, we propose an enhancement and analysis of transport control protocol friendly rate control (TFRC) for real-time data application (audio/video). Traditionally, real-time data transmission has been accomplished over the user datagram protocol (UDP). The challenging issues of using transport control protocol (TCP) are restrictive bandwidth and lagging. Additionally, it is widely known...
This paper presents the State-of-the-Art and recent trends of SCADA system Architecture, which is usually three-layer SCADA system architecture depending on open system technology rather than a vendor controlled, proprietary technology. A Real-time Industrial process is simulated (boiling system), and a complete three-layer model SCADA system is developed for this process, supervision control layer,...
The wireless data exchange system based on GPRS used in monitoring smoke emission in power plant is designed, the principle and the blue print of the system are described and the terminal hardware and Software are also described in details. A conclusion was presented at last.
Organizations require flexible and adaptable intrusion detection systems to combat increasing internal and external threats. To meet organizational objectives and requirements the intrusion detection systems must be effective. This paper analyzes Intrusion Detection Systems ability to detect the intrusions in computer systems after a thorough comparative theoretical study. Different security threats...
In this paper, we propose a middleware based on the OSGi framework for home robots in Home-Network. The home-network services make us convenient and cozy. In addition, it improves quality of our life and includes a function which is to interoperate each device. In this paper, home robots are composed dynamically in the network and we can use a lot of services by the home robots.
Hybrid relay systems using Amplify-and-Forward protocol (AF) and Decode-and-Forward protocol (DF) together are introduced in cooperative networks. For hybrid systems, we propose adaptive relay selection scheme to maximize the overall received Signal to Noise Ratio (SNR) at the destination. At first two relays are selected among many according to the instantaneous channel conditions. One is a relay...
The main objective of this study is to propose an internet telephone interception system under PcP SIP structure and to investigate VoIP interception mechanism under PcP SIP, DHT and the conventional centralized SIP structure. The stabilization operation in Chord is utilized to acquire the Resource Key of the intercepted target and to play the role of man-in-the-middle to achieve online connection...
Based on the widely used RS-485 communications net of mine's methame metrical system , the system's communication net was changed to CAN net. It is advantageous for control center to keep fluent communication with far excavate coal spot; it enhances the safety factor and solves the problem of telecommunication. The cost of system is low and the quondam communications cable can be used.
Wireless sensor and actuator networks (WSANs) have been more and more widely used in the factory environment, which requires real-time communications. This paper proposes a real-time message transmission protocol on WSANs. The proposed protocol finds the smallest-delay path from a source and the nearest actuator before packet transmission. After that, data packets are transmitted periodically along...
The TCP throughput deteriorates in networks with large bandwidth-delay product, and new congestion control algorithms have been proposed to address such deterioration. Traditional TCP protocols treat all packet loss as a sign of congestion. Their inability to recognize non-congestion related packet loss has significant effects on the communication efficiency. The proposed protocols such as TCP - Reno,...
Because there are a large number of power distribution transformer stations and they are far away from city, wireless GPRS transmission provides a good communication solution to supervise power distribution transformer stations. The scheme of remote wireless monitoring system for power distribution transformer station based on GPRS wireless network was designed in this paper. A control terminal system...
Most of the software developers are adopting the CBSE approach, to guarantee; on time delivery of software products, reduce development and maintenance cost and to improve reusability. CBSE is the development of new software by integrating built-in components. A component is a unit of composition with a well defined interface and having self-existence property. Component specification is performed...
The IEEE 802.16/WiMAX mesh standard is a promising technology to support next generation wireless broadband metropolitan area networks. The medium access control (MAC) layer of IEEE 802.16 mesh supports both centralized and distributed scheduling mechanisms. The coordinated distributed scheduling mechanism uses a pseudo-random election algorithm to determine the transmission times of the nodes. The...
The size of friction torque and the overall performance of clutch depend on the qualities of disk drives' end runout and radial runout. For the unceasingly increased requirements on detection technology in the domestic auto industry, a detection system which is used for automatic detection on line and automatic data storage has been designed, combined computer technology with the specific requirements...
In wireless sensor networks, energy efficiency is an important standard for evaluating the effectiveness of the time synchronization protocols. Hence, energy should be conserved as much as possible provided that algorithm can achieve a certain accuracy. In this paper, we propose an energy efficient time synchronization algorithm in which each layer of the network can be synchronized merely by receiving...
Teaching has always been a face to face interaction and hence requires physical presence of both teacher and the student. Teleteaching has been a revolution since it introduces teaching to geographic independence hence is a distributed system. Teleteaching as in any collaborative environment is very difficult to design. Before any implementation we need to model the system, here we have used ontology...
In order to solve the problem of data transmission slow and poor real-time control in the distributed system composed of PC extended card CP 5611 and multiple plc s7-200, their communication patterns and RS-485 protocol standards are analyzed. PC and multiple PLC build distributed application system through serial port to convert RS232 to RS485. Slave PLC based on free-port mode, custom command word...
This paper designs a powerful Web-based gateway for the on-site monitoring equipment network composed by RS-485, CAN and other communication protocols, thus to bridge between them and the Internet, allowing remote users can browse and manage these on-site monitoring equipments through browser anytime and anywhere. It also describes a method to optimize the network module based on applications, introduces...
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