101 research outputs found

    Comparative Study Of The VMTP, XTP, and TP4 Protocols And Their Functionalities From The Perspective Of The OSI Reference Model: Investigation Of OSI Protocols For Distributed Interactive Simulation

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    Report presents a comparative study of three communication protocols at the transport layer of the communication protocol stack, focusing on the similarities and differences of these three protocols in terms of transport layer functions

    Ethics in community nursing

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    The purpose of this theoretical paper is to explore the ethics in a community nursing. Nursing, a practice discipline recognizes caring, morals, and values as integral to the practice of all nurses. The ethical principles of beneficence, autonomy, advocacy, and social justice will be discussed from the lens of caring. Caring nursing theorists, such as Jean Watson, Ann Boykin, and Savina Schoenhofer, articulate the importance of understanding communities and individuals as whole and autonomous. These theorists and others challenge nursing to engage in a responsive, ethical and philosophical discourse when the community is viewed as autonomous

    Integrating IPsec within OpenFlow Architecture for Secure Group Communication

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    Network security protocols such as IPsec have been used for many years to ensure robust end⁃to⁃end communication and are important in the context of SDN. Despite the widespread installation of IPsec to date, per⁃packet protection offered by the protocol is not very compatible with OpenFlow and flow⁃like behavior. OpenFlow architecture cannot aggregate IPsec⁃ESP flows in transport mode or tunnel mode because layer⁃3 information is encrypted and therefore unreadable. In this paper, we propose using the Security Parameter Index (SPI) of IPsec within the OpenFlow architecture to identify and direct IPsec flows. This enables IPsec to conform to the packet⁃based behavior of OpenFlow architecture. In addition, by distinguishing between IPsec flows, the architecture is particularly suited to secure group communication

    Bit Error Rate and Frame Error Rate Data Processing for Space Communications and Navigation-Related Communication System Analysis Tools

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    One of the capabilities that the Space Communications and Navigation (SCaN) Strategic Center for Networking, Integration, and Communications (SCENIC) user interface (UI) web application intends to provide its users is the addition of network protocol and link encryption augmentations of communication system analyses. Before any of these analyses capabilities can be modeled, the simulations of bit error rate (BER) and frame error rate (FER) against signal-to-noise ratio (SNR) have been conducted, requiring parameters from several known coding types (low-density parity-check (LDPC), convolutional, etc.), signal modulations (binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), etc.), coding rates (1/2, 1/3, etc.), and frame sizes (1,280, 3,580, etc.). However, in order to extract useful information from the results of these simulations, a curve fitting technique has been applied to each resulting dataset to extend and extrapolate the curve fit of BER and FER down to 1030 using MATLAB Curve Fitting Toolbox (The MathWorks, Inc.). This is a necessary step because simulations of BER and FER were only performed to around 109 due to the extensive simulation time that would be required to obtain significant simulation results at the error levels desired. Furthermore, the fitted curve results were applied to a finer resolution for the SNR at 0.01-dB interval instead of the 0.05-dB interval limitation used in the simulation. All the possible combinations of the coding types, signal modulations, coding rates, frame sizes, and the extension of BER and FER curves would enable users to capture a wide range of link performances that directly relates to the addition of higher level networking data encapsulated in a frame. The curve fitting results also led to the modeling of the optical link error rate performance by solving for coding gain, FER_BER SNR delta, coded optical BER-SNR, and coded optical FERSNR

    Spartan Daily April 8, 2010

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    Volume 134, Issue 34https://scholarworks.sjsu.edu/spartandaily/1249/thumbnail.jp

    DSL-based triple-play services

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    This research examines the triple play service based on the ADSL technology. The voice over IP will be checked and combined with the internet data by two monitoring programs in order to examine the performance that this service offers and then will be compared with the usual method of internet connection.This research examines the triple play service based on the ADSL technology. The voice over IP will be checked and combined with the internet data by two monitoring programs in order to examine the performance that this service offers and then will be compared with the usual method of internet connection.

    NetPDL: An Extensible XML-Based Language for Packet Header Description

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    Although several applications need to know the format of network packets to perform their tasks, till now, each application uses its own packet description database. This paper addresses this problem by proposing the NetPDL, an XML-based language for describing packet headers, which has the potential of enabling the realization of a common, application-independent protocol description database that can be shared among several applications. Further, common functionalities related to the protocol database can be implemented in a library, which can be a basic building block for implementing networking applications

    Supporting real time video over ATM networks

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    Includes bibliographical references.In this project, we propose and evaluate an approach to delimit and tag such independent video slice at the ATM layer for early discard. This involves the use of a tag cell differentiated from the rest of the data by its PTI value and a modified tag switch to facilitate the selective discarding of affected cells within each video slice as opposed to dropping of cells at random from multiple video frames
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