DOCSLIB.ORG

United States Patent (10) Patent No.: US 7,142,649 B2 Edmon Et Al

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
United States Patent (10) Patent No.: US 7,142,649 B2 Edmon Et Al USOO7142649B2 (12) United States Patent (10) Patent No.: US 7,142,649 B2 Edmon et al. (45) Date of Patent: *Nov. 28, 2006 (54) DEDICATED DATA MODEM.SYSTEMAND 6,035,020 A * 3/2000 Weinstein et al. ....... 379,93.09 METHOD 6,363,079 B1* 3/2002 Barzegar et al. ............ 370/465 (75) Inventors: Eugene L. Edmon, Danville, CA (US); 6,751,304 B1* 6/2004 EdmO tal.a ........... 379,93.32 Carlton L. Brown, Danville, CA (US); Christopher T. Rice, San Antonio, TX (US) * cited by examiner (73) Assignee: SBC Knowledge Ventures, L.P., Reno, Primary Examiner Stella Woo NV (US) (74) Attorney, Agent, or Firm—Toler Schaffer, LLP (*) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 (57) ABSTRACT U.S.C. 154(b) by 3 days. This patent is Subject to a terminal dis- A data modem aggregator System and a method of initial claimer. izing a data modem is disclosed. In a particular embodiment, the data modem aggregator System includes a plurality of (21) Appl. No.: 10/833,376 data ports configured to communicate data traffic. The data traffic is carried over dedicated data twisted pair lines. The (22) Filed: Apr. 28, 2004 data modem aggregator system further includes shared data (65) Prior Publication Data processing resources to process the data traffic communi cated over the plurality of data ports and a high-speed US 2004/O213171 A1 Oct. 28, 2004 multiplexed output responsive to the plurality of data ports Related U.S. Application Data and the shared resources. (63) Continuation of application No. 10/176,234, filed on In a particular embodiment, the method of initializing a data Jun. 20, 2002, now Pat. No. 6,751,304. connection for a data modem includes detecting power-on of (51) Int. Cl the data modem, handshaking from the data modem with a H04M II/00 (2006.01) far end connection, negotiating a data rate with the far end (52) U.S. Cl. ................................. 379/9332: 379/93.28 connection, and communicating data between the data (58) Field of Classification Search ............. 379/9332, modem and the far end connection over a dedicated data 379/93.28, 90.01, 93.08, 93.31, 93.01; 375/222 twisted pair line. Each of the above steps in the initialization See application file for complete search history. process is performed without receiving a dial tone and (56) Ref Cited without dialing digits over a public switched telephone voice eerees e network. U.S. PATENT DOCUMENTS 5,307.402 A * 4, 1994 Cooper .................... 379,9332 15 Claims, 4 Drawing Sheets OO 10 06 DATALENE MODULATION OARD FRONTEND MODEM COMPUTER AGGREGATOR (MUX) 118DATA DATANE POR NITALIZATION CARD 34 MODULE 114 SHAREO DATA 154 AATRANSPORT PROCESSING PACKENETWORK RESOURCES 08 OLEBUS DATALENE TECOR MODUATION FRONEND NTERNESERVICE PROVIDER COMPUER 126 38 120 DATA DEVICESNMP PORT NIALATON MANAGEMENTSYSEM MODUE l i55 4. U.S. Patent NOV. 28 , 2006 Sheet 1 of 4 US 7,142,649 B2 U.S. Patent US 7,142,649 B2 002 U.S. Patent Nov. 28, 2006 Sheet 3 of 4 US 7,142,649 B2 MODEM POWER ON 302 MODEM HAND SHAKE WITH 304 FAR END CONNECTION NEGOTIATE DATARATE AND OTHER 306 ASPECTS OF DATA CONNECTION READY TO TRANSMIT 308 AND RECEIVE DATA BEGINDATA COMMUNICATION AT 30 REQUEST OF COMPUTER ESTABLISHINTERNET PROTOCOL (IP) 312 ADDRESS (E.G., ASSIGNIPADDRESS FROM ISP OR FROM MODEMAGGREGATOR) FULL DATA TRANSMISSION 34 FIG, 3 U.S. Patent Nov. 28, 2006 Sheet 4 of 4 US 7,142,649 B2 DETERMINE FTWISTED PAR LOOP AVAILABLE NSTALL AND PROVISION ADATA LOOP ATCO, CONNECT FAR END OF 406 DATA LOOP TO THE MODEMAGGREGATOR/MUX ACTIVATE SUBSCRIPTION TODATA SERVICE ON THE DATA LOOP AND 408 REGISTER IN SUBSCRIBER DATABASE PROVIDE CPE FOR SUBSCRIBER 410 INSTALLATION TOPC COMMUNICATE OVER DATA LOOP 412 SEND BILL TO SUBSCRIBER FOR 414 ACCESS TODAIA LOOP FIG. 4 US 7,142,649 B2 1. 2 DEDICATED DATA MODEMI SYSTEMAND In another embodiment, the system includes a data METHOD modem to communicate data over a dedicated data commu nication twisted pair line. The data modem includes a CLAIM OF PRIORITY dedicated data initialization module. The dedicated data communication twisted pair line is coupled to the modem at This application claims priority from and is a continuation a near end and is coupled to a data line card at a far end. The of U.S. patent application Ser. No. 10/176,234 filed Jun. 20, data line card is within a digital loop carrier. 2002 now U.S. Pat. No. 6,751,304, entitled “Dedicated Data In another embodiment an apparatus is provided. The Modem System and Method.” by Eugene L. Edmon, Carlton apparatus includes a data modem to communicate data over L. Brown, and Christopher T. Rice and is hereby incorpo 10 a dedicated data communication twisted pair line. The data rated by reference in its entirety. modem includes a dedicated data initialization module and modulation front-end. The modulation front-end is config BACKGROUND ured to utilize voice-band frequencies and frequencies above the Voice-band frequencies. 1. Field of the Invention 15 In another embodiment, a method of initializing a data The present invention relates to systems and methods modem connection is provided. The method includes detect associated with data modems and data communication. ing power-on of the data modem, handshaking from the data 2. Description of the Related Art modem with a far end connection, negotiating a data rate Personal computer users currently have two distinct with the far end connection, and communicating data options to access the internet, dial-up modems and high between the data modem and the far end connection over a speed data connections. Such as digital Subscriber loop dedicated data twisted pair line. Each of the above steps in (DSL) and cable-modem services. The high-speed data the initialization process is performed without receiving a connections provide faster data rates and increased perfor dial tone and without dialing digits over a public Switched mance. In addition, the high-speed data connections have an telephone voice network. advantage of being "always on', i.e. they do not require a 25 In another embodiment a method of providing a data user to wait during the process of dialing-up and then service is disclosed. The method includes coupling a dedi establishing a connection to the far end data equipment, cated data carrier line to a modem aggregator and activating thereby leading to faster startup user access. A disadvantage a data service to be provided using the dedicated data carrier of the high-speed data connections is that these services line. utilize more complex technology and have higher costs than 30 dial-up modems. BRIEF DESCRIPTION OF THE DRAWINGS It would therefore be desirable to provide a data connec FIG. 1 is a block diagram that illustrates a system that tion service that removes the inconvenience of the dial-up includes dedicated data modems and a modem aggregator process associated with dial-up modems and at a lower cost 35 FIG. 2 is a block diagram that illustrates a system that than DSL and cable-modem high-speed services. Accord includes dedicated data modems and a digital loop carrier. ingly, there is a need for improved systems and methods of FIG. 3 is a flow chart that illustrates a method of initial providing data communications. izing a data modem. FIG. 4 is a flow chart that illustrates a data modem SUMMARY 40 service. The use of the same reference symbols in different draw The present invention is directed to systems and methods ings indicates similar or identical items. associated with data modems and data communication. In a particular embodiment, a system is disclosed that DESCRIPTION OF THE EMBODIMENT(S) includes a data modem to communicate data over a dedi 45 cated data communication twisted pair line. The modem Referring to FIG. 1, a system 100 is illustrated. The includes a dedicated data initialization module. The dedi system 100 includes a computer 102, a data modem 106, a cated data communication twisted pair line is coupled to the line card shelf 110, a modem aggregator 112, a data transport modem at a near end and is coupled to a data line card at a packet network 114, and an Internet service provider (ISP) far end. 50 116. The computer 102 includes a data port 118 and, in a In another embodiment, the system includes a modem particular embodiment, is a conventional personal computer. aggregator including a plurality of data ports configured to The data modem 106 includes a modulation front-end 122 carry data traffic associated with dedicated remote data and a data initialization module 124. The data modem 106, modems. The modem aggregator further includes shared in a particular embodiment, is a modified V.90 or V.92 type data processing resources to process data traffic with respect 55 modem. The modifications to the industry-standard V.90 or to the plurality of data ports. The modem aggregator is V.92 modem are changes associated with the initialization coupled to a high-speed data connection. The system also module 124 and the modulation front-end 122 disclosed includes a data transport packet network responsive to the herein. The system 100 also includes an illustrative addi modem aggregator and coupled to the high-speed data tional computer 104 and an additional data modem 108. connection. 60 The line card shelf 110 includes a plurality of data line In another embodiment, the data modem aggregator sys cards such as data line card 130, data line card 132 and data tem includes a plurality of data ports configured to commu line card 160.
Load more

Recommended publications
  • Telecommunication Technologies for Smart Grid Projects with Focus on Smart Metering Applications
    energies Review Telecommunication Technologies for Smart Grid Projects with Focus on Smart Metering Applications Nikoleta Andreadou *, Miguel Olariaga Guardiola and Gianluca Fulli Energy Security, Systems and Markets Unit, Institute of Energy and Transport, Joint Research Centre, Ispra 21027, Italy; [email protected] (M.O.G.); [email protected] (G.F.) * Correspondence: [email protected]; Tel.: +39-033-278-3866 Academic Editor: Neville Watson Received: 10 February 2016; Accepted: 29 April 2016; Published: 17 May 2016 Abstract: This paper provides a study of the smart grid projects realised in Europe and presents their technological solutions with a focus on smart metering Low Voltage (LV) applications. Special attention is given to the telecommunications technologies used. For this purpose, we present the telecommunication technologies chosen by several European utilities for the accomplishment of their smart meter national roll-outs. Further on, a study is performed based on the European Smart Grid Projects, highlighting their technological options. The range of the projects analysed covers the ones including smart metering implementation as well as those in which smart metering applications play a significant role in the overall project success. The survey reveals that various topics are directly or indirectly linked to smart metering applications, like smart home/building, energy management, grid monitoring and integration of Renewable Energy Sources (RES). Therefore, the technological options that lie behind such projects are pointed out. For reasons of completeness, we also present the main characteristics of the telecommunication technologies that are found to be used in practice for the LV grid. Keywords: smart grid; smart grid projects; telecommunication technologies; smart metering solutions 1.
    [Show full text]
  • A Field Study to Determine the Feasibility of Establishing Remote Data Transmission of Advertising for a Local Newspaper
    Rochester Institute of Technology RIT Scholar Works Theses 11-1-1995 A Field study to determine the feasibility of establishing remote data transmission of advertising for a local newspaper John McKeever Jr Follow this and additional works at: https://scholarworks.rit.edu/theses Recommended Citation McKeever, John Jr, "A Field study to determine the feasibility of establishing remote data transmission of advertising for a local newspaper" (1995). Thesis. Rochester Institute of Technology. Accessed from This Thesis is brought to you for free and open access by RIT Scholar Works. It has been accepted for inclusion in Theses by an authorized administrator of RIT Scholar Works. For more information, please contact [email protected]. A Field Study to Determine the Feasibility of Establishing Remote Data Transmission of Advertising for a Local Newspaper By John J. McKeever, Jr. A thesis project submitted in partial fulfillment of the requirements for the degree of Master of Science in the School of Printing Management and Sciences of the Rochester Institute of Technology November, 1995 Thesis Advisors: Professors A. Ajayi and R. Hacker School ofPrinting Management and Sciences Rochester Institute ofTechnology Rochester, New York Certificate of Approval Master's Thesis lhis is to certify that the Master's Thesis of JohnJ. McKeever, Jr. With a major in Graphic Arts Publishing - Electronic Publishing has been approved by the Thesis Committee as satisfactory for the thesis requirement for the Master ofScience degree at the convocation of November 20, 1995 Thesis Committee: Robert G. Hacker Thesis Advisor Aisha Ajayi Thesis Advisor Marie Freckleton Graduate Program Coordinat()r C. Harold Goffin Director or Designate Copyright 1995 by John J.
    [Show full text]
  • Alphanumeric and Graphic CRT Terminals
    \ ALPHANUMERIC AND GRAPHIC CRT TERMINALS 1975 - 1980 VENTURE DEVELOPMENT CORPORATION One Washington Street Wellesley, Massachusetts 02181 Study Team: Lewis I. Solomon Steven E. Smylie Edward A. Ross @ Copyright, November 1975 by Venture Development Corporation All Rights Reserved VENTURE DEVELOPMENT CORPORATION REPORT STUDY TEAM LEWIS I. SOLOMON, Lewis 1. Solomon is the founder of President Venture Development Corporation. He has held positions in the management of semiconductor and computer research and development. He received his BEE in 1959 from Rensselaer Poly­ technic Institute, his MEE from The Polytechnic Institute of Brooklyn, and his MBA from the Harvard Graduate School of Business Administration. STEVEN E. SMYLIE, Steven E. Smylie joined Venture Consultant Development in 1975. Prior to joining the company he was an electroniy engineer specialiZing in the design of computer systems at RCA in Van Nuys, California. He holds a BS degree I cum laude in Engineering from the Univer­ sity of California - Los Angeles, and an MBA from the Harvard Graduate School of Business Administration. Mr. Smylie is a member of Tau Beta Pi. EDWARD A. ROSS, Edward A. Ross was President and Senior Consultant founder of both Ross Controls Corpora­ tion, and Trump-Ross Industrial Controls. He has held positions in sales management, and was Manager of Marketing Research at Raytheon's Industrial Components Division. He received his BS degree from the City College of New York in 1944, perform­ ed graduate work in marketing at Columbia University, and received
    [Show full text]
  • Telecontrol with GPRS Via IP-VPN
    Telecontrol with GPRS via IP-VPN The mobile data service GPRS allows you to transmit data wirelessly and inexpensively between remote technical systems. GPRS stands for General Packet Radio Service, and is a fast and efficient data service within the GSM mobile phone network. Operating costs for data transmission result from the amount of data actually transmitted and are hence predictable. GPRS technology is best suited for distributed applications that collect wide-ranging data (fill levels, flow rates, messages, alarms), and transmit it to a PC or supervisory control system. The process also works the other way around, i.e. commands and target values can be sent to the remote stations. IP-VPN stands for secure data transmission in the Internet. A closed user group within the mobile network and data transmission to the customer network secured by IP-VPN ensure that only eligible users have ac- cess and that data is secure over the entire transmission route. IP-VPN uses the Internet as the medium to transmit data to the customer network. The only requirement for the customer is Internet access with a static, public IP address and a VPN router. Common application areas include: water/waste water management, energy management, traffic control, mobile data communication, building automation, etc. Technical information No. D-038, Rev. 2.1, Stand 12/2016, Page 1 of 4 Panasonic Electric Works Europe AG, Automation products Tel.: 089 45354-2748, Fax: 089/45354-2222, e-mail: [email protected], Internet: www.panasonic-electric-works.com Fields of use: As a rule, the IP-VPN solution is used for large, peripheral facilities for secure operation that is readily avail- able.
    [Show full text]
  • Telecommunications Teacher's Guide
    Telecommunications Teacher's Guide Telecommunications CONTENTS Introductory notes 3 Course goals 3 Dealing with receptive skills 3 Pre-text work: activating schemata 3 The role of lexis . 3 Teaching functional language 4 Dealing with pronunciation 5 The role of grammar 6 Recycling and revision 6 Lesson notes 7 Module EE.01.1. Installation and maintenance of telecommunication lines 7 Module EE.01.2. Measurements of transmission parameters in telecommunication lines 22 Module EE.01.3. Installation and maintenance of telecommunications equipment 35 Module EE.06.1 Starting and maintenance of access networks 46 Module EE.06.2. Starting and maintenance of WANs 61 End of course test ​ 85 Key for end of course test 94 Strona 2 z 94 Introductory notes Course goals The material provided has specific and limited goals. The main focus is lexis related to specific technical areas and fields of professional competence. The lexis is presented in a range of communicative contexts. These are mainly transactional dialogues to provide listening practice of real-world language use, but also include reading texts from technical manuals and the like. These texts - both aural and written - contain many highly valuable examples of functional language. For anyone undertaking a career in these fields familiarity with a range of technical lexis is necessary but not by itself sufficient: as well as understanding the technical terms a worker must interact and cooperate with other workers, managers and clients. Therefore the notes provided for each lesson will include ideas on how to exploit the texts and examples for communicative as well as linguistic purposes.
    [Show full text]
  • 5G Module 5G Live Broadcasting Box Live Broadcasting Allows Users to Get Closer to Reality and the Scene
    5G 5G 5G Module 5G live broadcasting box Live broadcasting allows users to get closer to reality and the scene. However, in the 4G era, the signal available SIM8202G-M2 is a small-size multi-band 5G module with a new four-antenna design. Its package dimensions are is limited in live broadcasts, especially live broadcasts of large galas or sports events. The content needs to be 30*42mm, which can better meet the needs of terminal products with higher requirements on size. So far, sent to the broadcasting van from the camera, and then sent to the studio control room through the signal SIMCom has launched SIM8200EA-M2, SIM8200CE-M2, SIM8200G, SIM8300G-M2 and SIM8202G-M2, forming a transmission system after technical processing. When the signal is interrupted, the picture is jammed. Satellite quite comprehensive product line. All 5G modules support NSA/SA networking, cover all frequency bands of broadcasting vans require lying fiber-optic cables on site, which is very costly and manpower consuming. major network carriers worldwide, and are compatible with a variety of communication protocols, which are quite suitable for high-rate scenarios such as telemedicine and distance education, etc. SIMCom and its partner have launched a 5G live broadcasting box based on SIMCom 5G module SIM8200EA-M2. Thanks to the high bandwidth and low latency of 5G, live broadcast images can be quickly transmitted through the 5G module, reducing the latency time to the level of milliseconds. No need to lay fiber-optic cables on site. The live broadcasting box can easily upload data through the module and broadcast 4K or even 8K HD videos.
    [Show full text]
  • Ham Radio If You Live in a Motel Or Condominium
    - I one dollar 1 radio . 8 FEBRUARY 1976 [ *' ' I I 1 solid-state power amplifiers 16 Z amateur television 20 I vhf prescaler ' r .: ,,-. : , ,' - z microproce~~ors 50 .; .. .-. - . .F. " 7 P.,< ,, . , .,, v .A ,,jr;Tif , .3 ' (LIBr antenna gain 54 ,- ..TTP- ' ' * _. I Jw GvG. - I s- 1 G &7 .. ... I I Tempo VHFIONE t//(,"0,; l )OO//'LY~ i~('(ptl \r ~/I/IIIL//or No need to wait any longer - this is it! Whether you are already on 2-meter and want someting better or you're just thinking of getting into it, the VHFIONE is the way to go. Full 2-meter band coverage (144 to 148 MHz for transmlt and receive. Full phase lock syntheslred (PLL) so no channel crystals are required. Compact and l~ghtwe~ght- 9.5" long x 7" w~dex 2.25" h~gh.We~ght - About 4.5 Ibs. Prov~s~onsfor an accessory SSB adaptor. 5d1g1tLED recelve frequency d~splay. 5 KHz frequency select~onfor FM operation. -1 Automatic repeater split - selectable up or down for normal or reverse operation. Microphone, power cord and mounting bracket included. Two built-in programmable channels. All solid state. 10 watts output. TEMPO fmh Super selectivity with a crystal filter at the first IFand E type ceramic filter at the second IF. 800 Selectable receive frequencies. Accessory 9-pin So much for so little! 2 watt VHFlFM hand held socket. $495.00 6 Channel capability, solid TEMPO SSBIONE state. 12 VDC. 144-148 MHz SSB adapter for the Tempo VHFIOne (any two MHz), includes Selectable upper or lower sideband.
    [Show full text]
  • The Significance of Wireless Communication for the Metering Data Transmission Via Smart Grids
    Computer Applications in Electrical Engineering The significance of wireless communication for the metering data transmission via Smart Grids Robert Jędrychowski Lublin University of Technology 20-618 Lublin, ul. Nadbystrzycka 38A, e-mail: [email protected] The article presents technological solutions of the communication and data transmission area that are indispensable for the organization of smart metering. As the term “smart metering” is very broad, particular attention has been focused on solutions based on the GSM-based wireless transmission that makes possible to flexibly model the process of remote meter reading with the use of the existing technological infrastructure. The article determines factors that can decide over the application of a such communication type as well as technical specifications to be met in order to develop a system that could successfully operate over an extensive network. Characteristics of the communication equipment used in real-time metering and billing systems have also been presented. 1. Introduction Among the most important smart grid components there is a technologically advanced (smart) metering system that provides information about energy consumption and consumer profiles. The realization of such a system requires many technical and organizational actions to be performed in order to ensure correct operation of the system and to secure the expected profits. The term smart metering contains many issues [1] and among them the most important is an advanced metering infrastructure (AMI) and its integral components such as automated meter reading (AMR) and advanced meter management (AMM). Smart metering makes possible to supplement the basic metering function by such ones as the configuration of metering and communication circuits, energy supply management and a real-time data analysis at the levels of a consumer or the distribution system operator (OSD).
    [Show full text]
  • Telecontrol with GPRS and HSPA Via VPN
    Telecontrol with GPRS and HSPA via VPN The mobile data services allow you to transmit data wirelessly and inexpensively between widely distributed infrastructure systems. GPRS stands for General Packet Radio Service, and is an efficient, full-coverage Internet-based data service within the GSM mobile phone network. Operating costs for data transmission result from the amount of data actually transmitted and are hence predictable. GPRS, UMTS and HSPA are best suited for distributed applications that collect wide-ranging data (fill levels, flow rates, messages, alarms), and transmit it to a PC or supervisory control system. The process also works the other way around, i.e. commands and target values can be sent to the remote stations. VPN (Virtual Private Network) ensures that data will be transmitted securely from the main station to the substation. VPN tunnels are used to enable remote stations located outside the control system's network to access the internal network. The substation (client) thereby establishes a VPN connection to the accustomed VPN gateway of the control system or main station. Using this connection, data can be exchanged as if the device were part of the main station's local network. Technical information No. , Rev. 3.2, Stand 11/2016, Page 1 of 4 Panasonic Electric Works Europe AG, Tel.: 089 45354-2748, Fax: 089/45354-2222, e-mail: [email protected], Internet: www.panasonic-electric-works.com Fields of use: As a rule, the VPN solution is used for large, peripheral facilities for secure operation that is readily available. It is particularly well suited for automating facilities that are spread out geographically yet can be viewed as one local network.
    [Show full text]
  • Transmitting Data Over the Network Using an OPC Server
    MATEC Web of Conferences 210, 03002 (2018) https://doi.org/10.1051/matecconf/201821003002 CSCC 2018 Transmitting data over the network using an OPC server Filip Niculescu1,*, Adrian Savescu1, Andrei Mitru1 1National Research and Development Institute for Gas Turbines COMOTI, Automation Department, 220 D Iuliu Maniu Bd., Romania Abstract. The paper presents the way of transmitting the parameters of operation of a remote installation in a centralized control center of a company. The distance between the computers that collect the data and the data monitoring center is hundreds of kilometers. Data has to be transmitted through multiple physical environments and through multiple networks. This transmission channel must be very stable and secure against external threats to the company network. The monitored installation is comprised of 10 compressors each having a local control cabinet and transmitting data to monitoring computers in the control room. Centralized data in these computers are sent to the beneficiary. This transmission uses a tunneling solution provided by a company together with an OPC Server realized by using that function of the software in which the monitoring application is developed on the industrial computers in the control room of the respective installation. The results obtained in remote data transmission were very good. In conclusion, the configuration and software solutions adopted proved reliability and stability in operation. Introduction Industrial Internet and Machine-to-Machine (M2M) communications [10]. There is a worldwide interest to use the solution to The paper presents the practical realization of the transmit the data provided by an OPC server through a remote transmission of data from a remote compressor tunneling application between different computers that installation, hundreds of kilometers in the data center of can be in the same room or at a great distance from each the company that own the installation.
    [Show full text]
  • A Low Cost Wireless Data Acquisition System for a Remote Photovoltaic (PV) Water Pumping System
    Energies 2011, 4, 68-89; doi:10.3390/en4010068 OPEN ACCESS energies ISSN 1996-1073 www.mdpi.com/journal/energies Article A Low Cost Wireless Data Acquisition System for a Remote Photovoltaic (PV) Water Pumping System Ammar Mahjoubi *, Ridha Fethi Mechlouch and Ammar Ben Brahim Chemical and Processes Engineering Department, National School of Engineering of Gabes, Gabes University, Omar Ibn El Khattab Street, 6029 Gabes, Tunisia; E-Mails: [email protected] (R.F.M.); [email protected] (A.B.B.) * Author to whom correspondence should be addressed; E-Mail: [email protected]; Tel.: +216-97-862-751; Fax: +216-75-600-632. Received: 13 October 2010; in revised form: 14 December 2010 / Accepted: 23 December 2010 / Published: 4 January 2011 Abstract: This paper presents the design and development of a 16F877 microcontroller-based wireless data acquisition system and a study of the feasibility of different existing methodologies linked to field data acquisition from remote photovoltaic (PV) water pumping systems. Various existing data transmission techniques were studied, especially satellite, radio, Global System for Mobile Communication (GSM) and General Packet Radio Service (GPRS). The system’s hardware and software and an application to test its performance are described. The system will be used for reading, storing and analyzing information from several PV water pumping stations situated in remote areas in the arid region of the south of Tunisia. The remote communications are based on the GSM network and, in particular, on the Short text Message Service (SMS). With this integrated system, we can compile a complete database of the different parameters related to the PV water pumping systems of Tunisia.
    [Show full text]
  • CSM Unican 3 Data Logger Reliable Measurement Data Acquisition
    CSM UniCAN 3 Data Logger Reliable Measurement Data Acquisition Innovative Measurement and Data Technology CSM UniCAN Data Logger // UniCAN 3 UniCAN 3 Data Logger Reliable Measurement Data Acquisition The UniCAN 3 is a stand-alone data logger. Microcontroller-based CAN bus data loggers of the UniCAN line are very powerful and feature unique properties that are normally found only in larger devices. This is because key functions are implemented directly in the hardware (FPGA). In addition, the CSM file system supports the specific features of cutting-edge ATA flash-memory cards in terms of fast data storage rates and maximum data security. System Features f Fail-safe data acquisition f Start delay The firmware detects interruptions to the power A delay between ignition and the start of data supply and the removal of the CF card during recording can be defined. data recording. No data recorded up to this time f Remote data transmission is lost. Data recording restarts automatically Data can be transmitted via UMTS/GPRS/ as soon as the card is inserted again and the CDMA modem while data recording continues supply voltage restored. without interruption. Measurement data can be f Simultaneous acquisition read directly from the CF card or remotely via CAN messages and signals, each up to a maxi- modem/FTP server (data formats are, for exam- mum of eight separate groups, can be recorded ple: MDF, ASCII). For maximum data security, the in parallel. Each group has individual trigger- data transmission is binary. and filter criteria and can be used as linear- or f Data transmission modes ring buffers.
    [Show full text]