Filters








1,011 Hits in 6.0 sec

An Optimized Salahaddin University New Campus IP-Network Design using OPNET

Ammar. O., Raghad Z.Yousif, Rakan S.Rashid
2017 International Journal of Advanced Computer Science and Applications  
applications like FTP (File Transfer Protocol) which is a vital protocol in an academic environment.  ...  In the fourth scenario, a combination of the VLAN based core switch and FDDI is presented.  ...  It uses fiber optic cable up to 200 km in length (single ring) in a LAN environment, in a dual ring www.ijacsa.thesai.org topology, maximum distance is 100 km in the fourth scenario a hybrid technology  ... 
doi:10.14569/ijacsa.2017.081261 fatcat:yrbd7rb7cfdftiefaaih4jwcke

Industrial Communication Protocols [chapter]

Carlos E. Pereira, Peter Neumann
2009 Springer Handbook of Automation  
The topology can be either a ring or a line structure. The ring structure consists of a primary and a secondary channel. All slaves work in forwarding mode.  ...  The CAN specification [56.7] defines two bus states called dominant (logic 0) and recessive (logic 1). Any transmitter can drive the bus to a dominant state.  ... 
doi:10.1007/978-3-540-78831-7_56 fatcat:sb5nkrjo7bdtdkhzbk366qwl3q

New Unified PON-RAN Access Architecture for 4G LTE Networks

Kostas Ramantas, Kyriakos Vlachos, Anastasios N. Bikos, Georgios Ellinas, Antonis Hadjiantonis
2014 Journal of Optical Communications and Networking  
The proposed WDM-PON ring design supports a dynamic setup of virtual circuits for inter-base-station communication, over a dedicated λ LAN channel.  ...  This work presents a new converged access architecture for LTE mobile backhaul networks.  ...  In Section V, a resource reservation protocol is detailed for setting up all-optical virtual circuits at the λ LAN .  ... 
doi:10.1364/jocn.6.000890 fatcat:x3snlhlxwjernfotxsfimsjs2u

Converged Networking: A Review of Concepts and Technologies

Adel Ahmed Ali, Ahmed M. Al-Naamany
2000 Sultan Qaboos University Journal for Science  
The specific areas addressed here are networking basics, networking technologies, types of traffic, and convergence of computer and communication networks.  ...  Such aspects include, Payload convergence, Protocol convergence, Physical convergence, Device convergence, Application convergence, Technology convergence, etc.  ...  If a device fails, the primary and secondary rings enter a "wrap" state to form a logical connection and thus maintain the logical ring in the event of a link failure.  ... 
doi:10.24200/squjs.vol5iss0pp209-225 fatcat:n6nrffb6cjebzm2pddvarwc7mu

Architectures and technologies for high-speed optical data networks

V.W.S. Chan, K.L. Hall, E. Modiano, K.A. Rauschenbach
1998 Journal of Lightwave Technology  
Special attention is paid to the access network where innovative approaches to architecture may have a significant cost benefit.  ...  The WDM network architecture presented will stress WDM aware internet protocol (IP), taking full advantage of optical reconfiguration, optical protection and restoration, traffic grooming to minimize electronics  ...  The LAN is an important part of the access network.  ... 
doi:10.1109/50.736582 fatcat:n2orvlcd5jc4pm2q3h4r7zpfpi

Telecommunications issues of intelligent database management for ground processing systems in the EOS era

Joseph D. Touch
1994 Telematics and informatics  
This architecture is developed into a general overall design. It is shown that the current evolution of protocols is sufficient to support IDM at Gbps rates over large distances.  ...  This article presents a stepwiserefinement of the Intelligent Database Management (IDM) system of the Distributed Active Archive Center (DAACone of seven regionally-located EOSDIS archive sites) architecture  ...  The external access points constitute a set of nodes that interact through a separate meta-data LAN.  ... 
doi:10.1016/0736-5853(94)90023-x fatcat:zhstmhntineqjayqjdhhgyyhgi

The role of medium access control protocols in SCADA systems

J. Luque, I. Gomez
1996 IEEE Transactions on Power Delivery  
As a result of the analysis, the use of a MAC protocol is proposed for SCADA systems.  ...  Three types of MAC protocols are presented and analyzed: Polling, CSMA/CD (Carrier Sense Multiple Access with Collision Detection), and Token Bus.  ...  , etc.), or logical ones.  ... 
doi:10.1109/61.517471 fatcat:iod7i25o7vg6jbswbd36xtabju

Availability Improvement of Layer 2 Seamless Networks Using OpenFlow

Elias Molina, Eduardo Jacob, Jon Matias, Naiara Moreira, Armando Astarloa
2015 The Scientific World Journal  
In this paper, we present a combination of the Software-Defined Networking (SDN) approach and PRP topologies to establish a higher level of redundancy and thereby, through several active paths provisioned  ...  via the OpenFlow protocol, the global reliability is increased, as well as data flows are managed efficiently.  ...  Acknowledgments The work described in this paper was produced within the Training and Research Unit UFI11/16 funded by the University of the Basque Country (UPV/EHU).  ... 
doi:10.1155/2015/283165 pmid:25759861 pmcid:PMC4338402 fatcat:qnnkm3qqgvf5pmeqe7532qewzm

Mapping technological trajectories as patent citation networks. An application to data communication standards

Roberto Fontana, Alessandro Nuvolari, Bart Verspagen
2009 Economics of Innovation and New Technology  
We first consider the evolution of the broad technological system of Local Area Networks (LANs) and we identify the most significant inventions within the specific subfield of Ethernet.  ...  Our results suggest that these technological trajectories are characterized by the presence of a number of interconnected technological environments which cluster following an engineering logic.  ...  logic based on the internal search strategy of a specific company.  ... 
doi:10.1080/10438590801969073 fatcat:map4rb72njfitkucbsxnesjqhu

Architectural Concept of Virtual Automation Networks

Peter Neumann, Axel Poeschmann, Ralf Messerschmidt
2008 IFAC Proceedings Volumes  
This paper presents the open system architecture and first implementation steps for realizing a Virtual Automation Network.  ...  This significant challenge is extensively tackled by the European Integrated Project "Virtual Automation Networks".  ...  VAN does not describe a new communication protocol. Thus, the aim is to use the greatest amount of legacy LAN, WAN and industrial communications mechanisms.  ... 
doi:10.3182/20080706-5-kr-1001.02364 fatcat:gzx4rk2ttrd3ldp32vk7pwztxq

Communication in industrial automation—What is going on?

Peter Neumann
2007 Control Engineering Practice  
Nowadays, a large community is inventing the usage of Ethernet-based local communication systems in this domain ensuring the real-time, safe and secure behaviour of these systems.  ...  Future scenarios of geographically distributed production plants or services require the use of heterogeneous networks consisting of local and wide area, and wired and wireless communication systems operated  ...  The topology can be either a ring structure or a line structure. The ring structure consists of a primary and a secondary channel. All slaves work in forwarding mode.  ... 
doi:10.1016/j.conengprac.2006.10.004 fatcat:aal4map5crdvljsxfabjqxtp3q

Server I/O networks past, present, and future

Renato John Recio
2003 Proceedings of the ACM SIGCOMM workshop on Network-I/O convergence experience, lessons, implications - NICELI '03  
As a result several fabric types evolved and several interconnects emerged to satisfy a subset of the requirements.  ...  Enterprise and technical customers place a diverse set of requirements on server I/O networks. In the past, no single network type has been able to satisfy all of these requirements.  ...  Though several standard LANs still exist today (Ethernet, Token Ring, FDDI, ATM), Ethernet has the highest volumes.  ... 
doi:10.1145/944747.944749 fatcat:4ytmiuwahba6jgf4y2d7kq2pey

Server I/O networks past, present, and future

Renato John Recio
2003 Proceedings of the ACM SIGCOMM workshop on Network-I/O convergence experience, lessons, implications - NICELI '03  
As a result several fabric types evolved and several interconnects emerged to satisfy a subset of the requirements.  ...  Enterprise and technical customers place a diverse set of requirements on server I/O networks. In the past, no single network type has been able to satisfy all of these requirements.  ...  Though several standard LANs still exist today (Ethernet, Token Ring, FDDI, ATM), Ethernet has the highest volumes.  ... 
doi:10.1145/944748.944749 fatcat:mpsgonhiw5d6tiqvr7pzbytuvi

Practical experiences in interconnecting LANs via satellite

Nedo Celandroni, Erina Ferro, Francesco Potortì, Alessandro Bellini, Franco Pirri
1995 Computer communication review  
The project was developed in two phases: a) design and realisation of a satellite access scheme that supports real-time and non real-time traffic with a signal fading countermeasure, called FODA/IBEA-TDMA  ...  1 ; b) interconnection of LANs where real-time and non real-time applications run.  ...  With regard to the last point, it is surprising that a deterministic protocol, such as Token Ring, performs worse than a random access protocol, such as Ethernet, in the transmission of isochronous traffic  ... 
doi:10.1145/216701.216705 fatcat:z6abpjjfyjezpn4gkoep5jqxdm

Autonomous Pull-Push Community Construction Technology for High-Assurance

Khalid MAHMOOD, Xiaodong LU, Yuji HORIKOSHI, Kinji MORI
2009 IEICE transactions on information and systems  
services to specific users in specific place at specific time considering various context-attributes.  ...  , community pervasive services, service discovery protocols, autonomous community construction, progressive ripple zone (PRZ)  ...  More specifically, contrary to existing cross-layer approaches [16] which are tightly coupled with specific routing protocol and involve dependency of name/resource resolution protocol, proposed approach  ... 
doi:10.1587/transinf.e92.d.1836 fatcat:bxadgbijdzfxldzn4u57dl66sa
« Previous Showing results 1 — 15 out of 1,011 results