Types of Communication Protocols for Data Transmission
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Analysis of Server-Smartphone Application Communication Patterns
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Aaltodoc Publication Archive Aalto University School of Science Degree Programme in Computer Science and Engineering Péter Somogyi Analysis of server-smartphone application communication patterns Master’s Thesis Budapest, June 15, 2014 Supervisors: Professor Jukka Nurminen, Aalto University Professor Tamás Kozsik, Eötvös Loránd University Instructor: Máté Szalay-Bekő, M.Sc. Ph.D. Aalto University School of Science ABSTRACT OF THE Degree programme in Computer Science and MASTER’S THESIS Engineering Author: Péter Somogyi Title: Analysis of server-smartphone application communication patterns Number of pages: 83 Date: June 15, 2014 Language: English Professorship: Data Communication Code: T-110 Software Supervisor: Professor Jukka Nurminen, Aalto University Professor Tamás Kozsik, Eötvös Loránd University Instructor: Máté Szalay-Bekő, M.Sc. Ph.D. Abstract: The spread of smartphone devices, Internet of Things technologies and the popularity of web-services require real-time and always on applications. The aim of this thesis is to identify a suitable communication technology for server and smartphone communication which fulfills the main requirements for transferring real- time data to the handheld devices. For the analysis I selected 3 popular communication technologies that can be used on mobile devices as well as from commonly used browsers. These are client polling, long polling and HTML5 WebSocket. For the assessment I developed an Android application that receives real-time sensor data from a WildFly application server using the aforementioned technologies. Industry specific requirements were selected in order to verify the usability of this communication forms. The first one covers the message size which is relevant because most smartphone users have limited data plan. -
Performance of VBR Packet Video Communications on an Ethernet LAN: a Trace-Driven Simulation Study
9.3.1 Performance of VBR Packet Video Communications on an Ethernet LAN: A Trace-Driven Simulation Study Francis Edwards Mark Schulz edwardsF@sl .elec.uq.oz.au marksas1 .elec. uq.oz.au Department of Electrical and Computer Engineering The University of Queensland St. Lucia Q 4072 Australia Abstract medium term, we can expect that current LAN technolo- Provision of multimedia communication services on today’s gies will be utilized in the near term for packet transport of packet-switched network infrastructure is becoming increas- video applications [4,5, 61. Characterizing the performance ingly feasible. However, there remains a lack of information of current networks carrying video communications traffic is regarding the performance of multimedia sources operating therefore an important issue. This paper investigates packet in bursty data traffic conditions. In this study, a videotele- transport of real time video communications traffic, charac- phony system deployed on the Ethernet LAN is simulated, teristic of videotelephony applications, on the popular 10 employing high time-resolution LAN traces as the data traf- Mbit/s Ethernet LAN. fic load. In comparison with Poisson traffic models, the Previous work has established that Ethernet is capable of trace-driven cases produce highly variable packet delays, and supporting video communication traffic in the presence of higher packet loss, thereby degrading video traffic perfor- Poisson data traffic [6, 71. However, recent studies of high mance. In order to compensate for these effects, a delay time-resolution LAN traffic have observed highly bursty control scheme based on a timed packet dropping algorithm traffic patterns which sustain high variability over timescales is examined. -
Communication Protocol for Schools
Communication Protocol for Schools Communication plays a key role in creating and fostering strong, positive relationships between the school and the home. Communication is a two-way street; our schools share information with our families and community, and our families share information with our schools. The purpose of this document is to guide, manage and improve school-home communication by offering a standard format, structure and sequence for regular, ongoing communication. Communication Channels Communication can take place in a variety of formats. The message and the purpose of the communication can help determine which format is most appropriate. Generally, the more issues-driven and/or detailed the information is, the more direct the communication channel chosen should be. Communication channels include: Face-to-face communication – one-on-one meetings, School Council meetings, Parent-Student- Teacher interviews Telephone conversations Hard copy, written communication – letters sent home from the school, paper school newsletters Electronic communication – email, electronic newsletters, websites, social media When the communication requires a dialogue, such as bringing forward a question or concern or when a discussion is required on a particular topic, the preferred channels of communication are ones that allow for an immediate and ongoing interaction between the people involved. The best formats for this kind of communication are face-to-face conversations or telephone conversations. Schools and families are encouraged to use these direct channels of communication when a topic is complex or requires a dialogue. These more direct forms of communication also help us establish a personal connection, which helps build relationships that we don’t get in other forms of communication. -
Emerging Technologies Multi/Parallel Processing
Emerging Technologies Multi/Parallel Processing Mary C. Kulas New Computing Structures Strategic Relations Group December 1987 For Internal Use Only Copyright @ 1987 by Digital Equipment Corporation. Printed in U.S.A. The information contained herein is confidential and proprietary. It is the property of Digital Equipment Corporation and shall not be reproduced or' copied in whole or in part without written permission. This is an unpublished work protected under the Federal copyright laws. The following are trademarks of Digital Equipment Corporation, Maynard, MA 01754. DECpage LN03 This report was produced by Educational Services with DECpage and the LN03 laser printer. Contents Acknowledgments. 1 Abstract. .. 3 Executive Summary. .. 5 I. Analysis . .. 7 A. The Players . .. 9 1. Number and Status . .. 9 2. Funding. .. 10 3. Strategic Alliances. .. 11 4. Sales. .. 13 a. Revenue/Units Installed . .. 13 h. European Sales. .. 14 B. The Product. .. 15 1. CPUs. .. 15 2. Chip . .. 15 3. Bus. .. 15 4. Vector Processing . .. 16 5. Operating System . .. 16 6. Languages. .. 17 7. Third-Party Applications . .. 18 8. Pricing. .. 18 C. ~BM and Other Major Computer Companies. .. 19 D. Why Success? Why Failure? . .. 21 E. Future Directions. .. 25 II. Company/Product Profiles. .. 27 A. Multi/Parallel Processors . .. 29 1. Alliant . .. 31 2. Astronautics. .. 35 3. Concurrent . .. 37 4. Cydrome. .. 41 5. Eastman Kodak. .. 45 6. Elxsi . .. 47 Contents iii 7. Encore ............... 51 8. Flexible . ... 55 9. Floating Point Systems - M64line ................... 59 10. International Parallel ........................... 61 11. Loral .................................... 63 12. Masscomp ................................. 65 13. Meiko .................................... 67 14. Multiflow. ~ ................................ 69 15. Sequent................................... 71 B. Massively Parallel . 75 1. Ametek.................................... 77 2. Bolt Beranek & Newman Advanced Computers ........... -
Voice Over Internet Protocol (Voip): a Brief Review
© APR 2018 | IRE Journals | Volume 1 Issue 10 | ISSN: 2456-8880 Voice over Internet Protocol (VoIP): A Brief Review ANURAG K MADHESHIYA1, KIRAN S KALE2, SHIV K YADAV3, JIGNESHKUMAR R. VALVI4 1,2,3,4 Department of Electronics and Communication, SVNIT Surat, India Abstract -- VoIP stands for Voice over Inter Protocol. It is setting up calls, registering the calls, authenticating a communication protocol mainly used for voice and terminating the call. Protocol belonging to H.323 communication, data transfer and video calling. It is based family of protocol uses TCP and UDP connection for on packet transmission over internet network. Paul Baran transportation. For call registering and call signaling and other researchers developed the packet network in the H.225 protocol is used. For media session mid twentieth century. In 1973 Dany Cohen first demonstrated packet voice in flight simulator application. establishment and controlling H.245 is used. For Due to its digital nature it is easy to operate on this protocol. conferencing T.120 protocol is used [3]-[4]. Index Terms: MGCP, Packet, QoS, SIP I. INTRODUCTION Voice over Internet Protocol also known as Voice over IP and VoIP is a communication standard for transmission of voice signal, data transmission and video conferencing. Actually this technology follow packet switching. In packet switching first the input signal (voice, data, video) converted into digital form so other operation becomes simple after this we do encoding, compressing of digital data to make more secure transmission through channel. Then after this we transmit the signal over the channel. At receiver side we do reverse of it but it also require an addition block before receiver to store packets and reorder these packets because in packet switching different Figure 1: Call flow of H.323 packets follow different path so reaches in random manner. -
Publication Title 1-1962
publication_title print_identifier online_identifier publisher_name date_monograph_published_print 1-1962 - AIEE General Principles Upon Which Temperature 978-1-5044-0149-4 IEEE 1962 Limits Are Based in the rating of Electric Equipment 1-1969 - IEEE General Priniciples for Temperature Limits in the 978-1-5044-0150-0 IEEE 1968 Rating of Electric Equipment 1-1986 - IEEE Standard General Principles for Temperature Limits in the Rating of Electric Equipment and for the 978-0-7381-2985-3 IEEE 1986 Evaluation of Electrical Insulation 1-2000 - IEEE Recommended Practice - General Principles for Temperature Limits in the Rating of Electrical Equipment and 978-0-7381-2717-0 IEEE 2001 for the Evaluation of Electrical Insulation 100-2000 - The Authoritative Dictionary of IEEE Standards 978-0-7381-2601-2 IEEE 2000 Terms, Seventh Edition 1000-1987 - An American National Standard IEEE Standard for 0-7381-4593-9 IEEE 1988 Mechanical Core Specifications for Microcomputers 1000-1987 - IEEE Standard for an 8-Bit Backplane Interface: 978-0-7381-2756-9 IEEE 1988 STEbus 1001-1988 - IEEE Guide for Interfacing Dispersed Storage and 0-7381-4134-8 IEEE 1989 Generation Facilities With Electric Utility Systems 1002-1987 - IEEE Standard Taxonomy for Software Engineering 0-7381-0399-3 IEEE 1987 Standards 1003.0-1995 - Guide to the POSIX(R) Open System 978-0-7381-3138-2 IEEE 1994 Environment (OSE) 1003.1, 2004 Edition - IEEE Standard for Information Technology - Portable Operating System Interface (POSIX(R)) - 978-0-7381-4040-7 IEEE 2004 Base Definitions 1003.1, 2013 -
N94-13338 1.1.1 3Rd NASA Symposium on VLSI Design 1991
N94-13338 1.1.1 3rd NASA Symposium on VLSI Design 1991 Experience with Custom Processors in Space Flight Applications M. E. Fraeman, J. R. Hayes, D. A. Lohr, B. W. Ballard, R. L. Williams, and R. M. Henshaw Johns Hopkins University Applied Physics Laboratory Laurel, Maryland 20723 Abstract- APL has developed a magnetometer instrument for a Swedish satel- lite named Freja with launch scheduled for August 1992 on a Chinese Long March rocket. The magnetometer controller utilized a custom microprocessor designed at APL with the Genesil silicon compiler. The processor evolved from our experience with an older bit-slice design and two prior single chip efforts. The architecture of our microprocessor greatly lowered software development costs because it was optimized to provide an interactive and extensible pro- gramming environment hosted by the target hardware. Radiation tolerance of the microprocessor was also tested and was adequate for Freja's mission-- 20 kRad(Si) total dose and very infrequent latch-up and single event upset events. 1 Introduction The Johns Hopkins University Applied Physics Laboratory (APL) has developed a micro- processor that is well suited to one-of-a-kind embedded applications especially in satellite instrument control. The chip has been qualified for use in a magnetometer instrument for the Swedish Freja satellite. The processor's language directed architecture reduced Freja software costs because the flight hardware served as its own development system. Thus, unlike traditional interpreted programming languages like Basic, Lisp, or Smalltalk, our Forth language development system was fully supported on the embedded flight proces- sor. Performance was also equivalent or better than that obtained by other microprocessors programmed in languages like C with traditional cross-compilers and development systems. -
An Evaluation Protocol for Picture Archiving and Communication System: a Systematic Review
ORIGINAL PAPER An Evaluation Protocol for Picture Archiving and Communication System: a Systematic Review Mohsen S. Tabatabaei1, ABSTRACT Mostafa Langarizadeh1, Introduction: Picture archiving and communication system (PACS) serves to store, transmit, communi- Kamran Tavakol2 cate and manage medical images. A logical evaluation protocol assists to determine whether the system is technically, structurally and operationally fit. The purpose of this systematic review was to propose a 1Department of Health Information logical evaluation protocol for PACS, particularly useful for new hospitals and other healthcare institutions Management, School of Health Management and Information Sciences, Iran University of in developing countries. Methods and Materials: We systematically reviewed 25 out of 267 full-length Medical Sciences. Tehran, Iran articles, published between 2000 and 2017, retrieved from four sources: Science Direct, Scopus, PubMed 2School of Medicine, University of Maryland and Google Scholar. The extracted data were tabulated and reviewed successively by three independent Baltimore. Baltimore, MD, USA panels of experts that oversaw the design of this study and the process by which the PACS evaluation protocol was systematically developed. Results: The outcome data were ranked by expert panels and Corresponding author: Mohsen S. Tabatabaei, Tel: +98-990-188-0720. E-mail: [email protected] analyzed statistically, with the reliability established at 0.82 based on the Pearson’s correlation coefficient. The essential components and the best options to establish an optimal PACS were organized under nine main sections: system configuration; system network; data storage; data compression; image input; image doi: 10.5455/aim.2017.25.250-253 characteristics; image presentation; communication link; and system security, with a total of 20 compo- ACTA INFORM MED. -
Space Station Freedom Data Management System Growth and Evolution Report
NASA Technical Memorandum 103869 Space Station Freedom Data Management System Growth and Evolution Report R. Bartlett, G. Davis, T. L. Grant, J. Gibson, R. Hedges, M. J. Johnson, Y. K. Liu, A. Patterson-Hine, N. Sliwa, H. Sowizral, and J. Yan N93-15k77 (NASA-TM- I03869) SPACE STATION FREEDOM DATA MANAGEMENT SYSTEM GROWTH ANO EVOLU TIr}N REPORT (NASA) Uncl as September 1992 66 P G3/17 0178407 National Aeronautics and Space Administration Z NASA Technical Memorandum 103869 Space Station Freedom Data Management System Growth and Evolution Report T. L. Grant and J. Yan, Ames Research Center, Moffett Field, California September 1992 RIASA National Aeronauticsand Space Administration Ames Research Center MoffettField, CaJifomia94035-1000 The Study Team The Data Management System (DMS) analysis team Digital Equipment Corporation, Moffett Field, CA consists of civil servants and contractors at NASA Ames Roger Bartlett Research Center, Information Sciences Division. Prof. Joanne Bechta Dugan provided the reliability Intelligent Systems Technology Branch, Ames analysis of the DMS network reported in appendix B; she Research Center, Moffett Field, CA used the HARP code and the work was sponsored by Gloria Davis Langley Research Center (LaRC). Members of the Failure Terry Grant Tolerance/Redundancy Management Working Group Bob Hedges provided network failure information and preliminary Y. K. Liu models that aided our study of the failure tolerance of the Dr. Ann Patterson-Hine DMS network. Nancy Sliwa We also acknowledge the following individuals for Sterling Federal Systems, Inc., Palo Alto, CA reviewing early versions of the manuscripts: Dr. Jerry Yah Gregg Swietek (NASA Headquarters), Mike Pasciuto (NASA), Donald Woods (McDonnell Douglas Space Research Institute for Advanced Computational Systems Company (MDSSC)) and George Ganoe Science, Moffett Field, CA (NASA LaRC). -
Internet of Things (Iot): Protocols White Paper
INTERNET OF THINGS (IOT): PROTOCOLS WHITE PAPER 11 December 2020 Version 1 1 Hospitality Technology Next Generation Internet of Things (IoT) Security White Paper 11 December 2020 Version 1 About HTNG Hospitality Technology Next Generation (HTNG) is a non-profit association with a mission to foster, through collaboration and partnership, the development of next-generation systems and solutions that will enable hoteliers and their technology vendors to do business globally in the 21st century. HTNG is recognized as the leading voice of the global hotel community, articulating the technology requirements of hotel companies of all sizes to the vendor community. HTNG facilitate the development of technology models for hospitality that will foster innovation, improve the guest experience, increase the effectiveness and efficiency of hotels, and create a healthy ecosystem of technology suppliers. Copyright 2020, Hospitality Technology Next Generation All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior permission of the copyright owner. For any software code contained within this specification, permission is hereby granted, free-of-charge, to any person obtaining a copy of this specification (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the above copyright notice and this permission notice being included in all copies or substantial portions of the Software. -
Inter-Processor and Inter-Computer Communications
Inter-processor and Inter-computer Communications David Rye :: MTRX3700 Communications :: Slide 1 of 87 Classification . Close-coupled . Loose-coupled . On-board busses . Serial . Backplanes . RS-232 . RS-422 . RS-485 . CAN . Ethernet David Rye :: MTRX3700 Communications :: Slide 2 of 87 Classification . Interface standard: . Software protocol: physical definition of definition of . Connectors . Order and encoding of . Pin assignments the data words being . Voltage levels transmitted (logic encoding) . Flow control . Timing and handshaking . Error detection and correction David Rye :: MTRX3700 Communications :: Slide 3 of 87 Parallel Busses . Single processor . Multi-processor . Bus mastering . Always short – less than 5m, and often much less David Rye :: MTRX3700 Communications :: Slide 4 of 87 Some Parallel Bus Standards . IEEE-488 (HP-IB, GPIB) . S-100 bus (Altair) . Intel Multibus (Intel, Sun). Adopted as IEEE-765 bus . VMEbus (Motorola 68000). Adopted as IEEE-1014 bus . ISA . PCI . PCIe . etc, etc, etc… David Rye :: MTRX3700 Communications :: Slide 5 of 87 Backplanes, sub-racks and enclosures . Backplanes provide electronic connection for bus signals between processor, memory and I/O boards CAMAC VME Bus All are passive backplanes PCIe David Rye :: MTRX3700 Communications :: Slide 6 of 87 Backplanes, sub-racks and enclosures . Sub-racks provide physical mounting and restraint for backplanes and plug-in cards Eurocard subrack and cards 19” subrack David Rye :: MTRX3700 Communications :: Slide 7 of 87 Backplanes, sub-racks and enclosures . Enclosures and cases provide mounting and environmental protection 19” Rack Case Enclosures Floor-standing 19” rack enclosure 19” Desktop case (exploded view) David Rye :: MTRX3700 Communications :: Slide 8 of 87 IEEE-488 Standard (HP-IB1 or GPIB) . -
Ats.T UNIX® SYSTEM V/386 RELEASE4 MULTIBUS® Reference
ATs.T UNIX® SYSTEM V/386 RELEASE4 MULTIBUS® Reference Manual ·::::\ .. '''\~:::t::. ::· UNIX Software Operation Copyright 1990, 1989, 1988, 1987, 1986, 1985, 1984 AT&T All Rights Reserved Printed in USA Published by Prentice-Hall, Inc. A Division of Simon & Schuster Englewood Cliffs, New Jersey 07632 No part of this publication may be reproduced or transmitted in any form or by any means-graphic, electronic, electrical, mechanical, or chemical, including photocopying, recording in any medium, tap ing, by any computer or information storage and retrieval systems, etc., without prior permissions in writing from AT&T. ACKNOWLEDGEMENT Portions of this book have been provided by Intel Corporation. IMPORTANT NOTE TO USERS While every effort has been made to ensure the accuracy of all information in this document, AT &T assumes no liability to any party for any loss or damage caused by errors or omissions or by state ments of any kind in this document, its updates, supplements, or special editions, whether such er rors are omissions or statements resulting from negligence, accident, or any other cause. AT&T furth er assumes no liability arising out of the application or use of any product or system described herein; nor any liability for incidental or consequential damages arising from the use of this docu ment. AT&T disclaims all warranties regarding the information contained herein, whether expressed, implied or statutory, including implied warranties of merchantability or fitness for a particular purpose. AT&T makes no representation that the interconnection of products in the manner described herein will not infringe on existing or future patent rights, nor do the descriptions contained herein imply the granting or license to make, use or sell equipment constructed in accordance with this description.