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检索条件"任意字段=Conference on All-Optical Communication Systems: Architecture, Control and Network Issues"

共 2532 条记录，以下是2351-2360 订阅

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A fairness study of the adaptive RIO active queue management algorithm

A fairness study of the adaptive RIO active queue management...

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Mexican International conference on Computer Science (ENC)

作者： R. Cartas J. Orozco J. Incera D. Ros ITAM Mexicali Mexico GET/ENST Bretagne IRISA ARMOR Research Team Rennes France GET/ENST Bretagne IRISA ARMOR Research Team Cesson-Sevigne France

Active queue management (AQM) mechanisms manage queue lengths by dropping packets when congestion is building up; end-systems can then react to such losses by reducing their packet rate, hence avoiding severe congestion. They are also very useful for the differentiated forwarding of packets in the DiffServ architecture. Many studies have shown that setting the parameters of an AQM algorithm may prove difficult and error-prone, and that the performance of AQM mechanisms is very sensitive to network conditions. The adaptive RIO mechanism (A-RIO) addresses both issues. It requires a single parameter, the desired queuing delay and adjusts its internal dynamics accordingly. A-RIO has been thoroughly evaluated in terms of delay response and network utilization but no study has been conducted in order to evaluate its behaviour in terms of fairness. By way of ns-2 simulations, This work examines A-RIO's ability to fairly share the network's resources (bandwidth) between the flows contending for those resources. Using Jain's fairness index as our performance metric, we compare the bandwidth distribution among flows obtained with A-RIO and with RIO.

关键词： Quality of service Aggregates Diffserv networks Bandwidth Harmonic analysis Traffic control Tin Throughput communication system traffic control Delay

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Machine Learning Enables Uplink Interference Suppression in RIS-Aided Proactive Mobile network

Machine Learning Enables Uplink Interference Suppression in ...

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International conference on Wireless communications and Signal Processing (WCSP)

作者： Qianyu Wang Xiong Li Qimei Cui Bowen Zhao National Engineering Research Center for Mobile Network Technologies Beijing University of Posts and Telecommunications Beijing China

ISBN: (数字)9798350390643

ISBN: (纸本)9798350390650

The proactive mobile network (PMN) is an innovative architecture to support minimal latency communications. It adopts an open-loop communication mode, which cancels all real-time control feedback processes and utilizes virtual cells to allocate radio resources to users. However, this design also results in significant potential mutual interference and deteriorates the communication reliability. To address this issue, we propose introducing multi-reconfigurable intelligent surface (RIS) technology, aiming to enhance the PMN's resilience to interference during the more challenging uplink process. Unlike conventional networks, the PMN faces not only the lack of real-time channel state information (CSI), but also the unknown transmission requirements of users. Therefore, managing RISs to serve PMN is an arduous task. We propose a scheme that trains the long short-term memory network (LSTM) using joint CSI, which is iteratively updated with an asynchronous advantage actor-critic (A3C)-based method over time scales. This enables the acquisition of predicted CSI, thus achieving accurate control of RIS to suppress interference. The simulation results highlight the effectiveness of the proposed scheme, demonstrating an improvement of over 21% in the probability of successful physical connections between users and access points (APs), compared to schemes based on outdated CSI and time-correlated CSI.

关键词： Interference suppression Wireless communication Simulation Reliability engineering Real-time systems Uplink Long short term memory Surface treatment Signal to noise ratio Resilience

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High-Capacity, A Secret Video Sharing Using DM-Stego and Genetic Algorithm

High-Capacity, A Secret Video Sharing Using DM-Stego and Gen...

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Self Sustainable Artificial Intelligence systems (ICSSAS), International conference on

作者： R. Logeshwari Rajasekar Velswamy Subhashini R V Karunakaran Department of Network and Communication Engineering SRM Institute of Technology Kattankulathur Chennai India Department of Computer Science and Engineering SRM Institute of Science and Technology Chennai India Department of Information Technology Sona College of Technology Salem India Dept. of CSE-AI and ML Sri Eshwar College of Engineering Coimbatore India

Electronic media knowledge is unprecedently increasing in recent years. In almost all security control areas, traffic control, weather monitoring, video conferences, social media etc., videos and multimedia data analysis practices are used. As a consequence, it is necessary to retain and transmit these data, by considering the security and privacy issues. IN this research study, a new Div-Mod Stego algorithm is combined with the Multi-Secret Sharing method along with temporary frame reordering and Genetic algorithm to implement high-end security in the process of video sharing. The qualitative and quantitative analysis has also been carried out to compare the performance of the proposed model with the other existing models. A computer analysis shows that the proposed solution would satisfy the requirements of the real-time application.

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Wireless extension mechanism and logic design for FPGA-based Ethernet Powerlink node

Wireless extension mechanism and logic design for FPGA-based...

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International conference on Computer and Information Science (ACIS)

作者： Kailong Zhang Liang Hu Panfei Zuo Xiao Wu Kejian Miao School of Computer Science and Engineering Northwestern Polytechnical University Xi'an Shaanxi China

ISBN: (纸本)9781509008070

Real-time networks, such as industrial network, field bus and so on, have been becoming one vital component to develop large-scale and cooperative embedded systems. As one important branch, the wireless mode of realtime networks also raises more and more attentions in recent years since its conveniences to construct a flexible control system. Ethernet Powerlink is such a typical real-time industrial network protocol, and provides a master-slave, time-slot mechanism that can well avoid radio collisions. With the designed FPGA-based hardware node, in this paper, a new method to extend wireless capability of Powerlink is explored and described. Concretely, Powerlink architecture and especially its original mechanisms are analyzed at first. For effectively connecting OpenMAC module of Powerlink and RF module, an interface logic at MAC layer is introduced and is typically designed in a multiplexing mode with a dual-FIFO logic according to the limited resource on FPGA, some key designs and mechanisms of which are detailed later. Finally, all designed mechanisms and logics are implemented as an extension part of IP core of Powerlink in VHDL language, and the communication functions and performance of such extended protocol are verified.

关键词： Protocols Wireless communication Multiplexing Radio frequency Real-time systems Hardware Wireless sensor networks

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A resource management architecture over differentiated services domains for guarantee of bandwidth, delay and jitter

A resource management architecture over differentiated servi...

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IEEE/AFCEA EUROCOMM Information systems for Enhanced Public Safety and Security

作者： K. Tajima M. Hashmani M. Yoshida Nippon Steel Information and Communication Systems Inc. USA

network-based applications like video and voice over IP (VoIP), require guarantee of end-to-end QoS. The guarantee of end-to-end QoS requires an efficient resource management mechanism that can reserve/control resources like bandwidth, delay and jitter according to a policy for immediate and future resource utilization. Only a few resource management architectures called the resource manager (RM) have been implemented till today but all of them manage only the bandwidth in a network. We propose ENICOM's policy based resource manager (PREM) to address the above issues. PREM provides a set of useful API to make, cancel and change resource reservations and it can manage not only bandwidth but also delay and jitter which is possible mainly due to a highly efficient algorithm called the resource tracker (RTK). The RTK tracks resource reservation and availability in time using timeslices. We describe PREM and it's various components, which enable it to provide guarantee of end-to-end QoS in terms of bandwidth, delay and jitter.

关键词： Resource management Bandwidth Delay Jitter Quality of service Steel Internet telephony Videoconference Admission control Telecommunication traffic

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Applications of Capacity Enlargement and Traffic Management control in Hybrid Satellite-Terrestrial 5G networks

Applications of Capacity Enlargement and Traffic Management ...

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IEEE International conference on Electronics and communication Engineering (ICECE)

作者： M. Mourad Mabrook Aziza I. Hussein Space Communication Dept. Faculty of Navigation Science and Space Technology Beni-Suef University Beni-Suef Egypt Electrical & Computer Eng. Dept. Effat University Jeddah KSA

ISBN: (纸本)9781665487900

The significant volume of data traffic, ultimate data rates, reduced latency, more transmissions with efficient energy, spectrum consumption, and novel technological use cases must all be considered using the fifth generation (5G) mobile network. Future 5G networks will connect billions of objects, known as the Internet of Things (IoT) or massive Machine-T communications (mMTC), in addition to standard Mobile Broadband (MBB) services. Non-Terrestrial networks (NTNs) may serve connection requests anywhere and anytime by offering wide-area coverage and preserving service continuity, availability, and scalability. The satellite platform is a crucial NTN for integrating with the 5G network and delivering the necessary services. Soon, 5G network development will depend on satellite access, as stated in the 3Gpp Release 16 specification. This paper provides options for incorporating satellite systems into a 5G network design to increase capacity and extend coverage in 5G mobile networks. In addition, 5G networks must address a network model to resolve outage, congestion, and cell edge context issues. The last phase is the simulation of the problem formulation for the investigation of capacity and traffic in hybrid satellite-terrestrial 5G mobile backhauling networks.

关键词： Satellites 5G mobile communication Numerical analysis Simulation Scalability Merging Internet of Things

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Efficient heuristic for routing static dependable connections in WDM networks with SRLGs

Efficient heuristic for routing static dependable connection...

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International conference on Ultra Modern Telecommunications and Workshops (ICUMT)

作者： Maroua Bakri Mohamed Koubàa Ammar Bouallègue Communication Systems Laboratory Information and Communications Technology Department École Nationale dIngénieurs de Tunis-University of Tunis El Manar Tunis Tunisia

Planning effective fault-recovery mechanisms is widely considered as one of the most critical challenges that need to be addressed when designing all-optical WDM transport networks. networks providing such facilities are said to be survivable, that is, networks which are able to continue performing their designated set of functions during and after the occurrence of a network component failure. Many studies dealing with the network survivability problem have been carried out, during the two past decades, and several fault-recovery schemes have been proposed. The main objective is minimizing the total bandwidth consumption while guaranteeing the recoverability of established connections. In this paper, we present an original heuristic approach that tackles the problem of establishing static connections with fault-tolerant requirements commonly referred to as dependable connections (D-connections) taking into consideration the Shared Risk Link Group (SRLG) constraint. We call a SRLG, a subset of links in the network that share the risk of failure at the same time. Based on the Partial Path Protection (PPP) recovery scheme, our approach aims at minimizing the total required network resources reserved for protection using two different resource sharing techniques - namely, backup multiplexing and primary-backup multiplexing. We hope by doing so, maximizing the overall network throughput. To the best of our knowledge, this is the first attempt to include the primary-backup multiplexing concept to improve resource utilization when providing protection for static traffic without compromising the 100% fault-survivability guarantee in optical networks with SRLG constraints. The effectiveness of the proposed heuristic is demonstrated through illustrative numerical examples.

关键词： Resource management optical fiber networks WDM networks optical pulses Redundancy

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The Development of Wireless Sensor network for ECG Monitoring

The Development of Wireless Sensor Network for ECG Monitorin...

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Annual International conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

作者： Jun-Liang Lin Hsien-Chieh Liu Yu-Ting Tai Hsin-Hsien Wu Shuo-Jen Hsu Fu-Shan Jaw You-Yin Chen Department of Electrical and Control Engineering National Chiao Tung University Hsinchu Taiwan Institute of Biomedical Engineering National Taiwan University Taipei Taiwan

The main problem we want to solve contains two subjects: The first one is the patient's pressure due to wired physiological signal estimation. With wireless sensor network technique, patients only need to carry a few small nodes, and then the physiological signal can be transmitted in the air. The other subject of the vital problem is that some protocols, like Bluetooth, provide a peer to peer wireless communication technique, but such peer to peer network may need a complex algorithm to find the best data transmission path. In this study, we use the hierarchy routing as network topology that three-layer architecture contains PAN coordinator, router and device. The study focuses on implementation of a prototype electrocardiography (ECG) system which replaces wired connections between sensor points and a central node with wireless links. Successful implementation of the final system would be of benefit to all involved in the use of ECG as access to and movement of the patient would not be impeded by the physical constraints imposed by the cables. Most aspects of the design would also be portable to other sensor applications, making the work relevant to a vast range of systems where movement of sensors is desirable and constrained by hard-wired links

关键词： Wireless sensor networks Electrocardiography Peer to peer computing Biomedical monitoring Sensor systems and applications Patient monitoring Estimation Wireless application protocol Bluetooth Wireless communication

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Autonomous Farming: Modeling and control of Agricultural Machinery in a Unified Framework

Autonomous Farming: Modeling and Control of Agricultural Mac...

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International conference on Mechatronics and Machine Vision in Practice (M2VIP)

作者： R. Eaton J. Katupitiya K. W. Siew B. Howarth School of Electrical Engineering and Telecommunications University of New South Wales Sydney NSW Australia School of Mechanical & Manufacturing Engineering University of New South Wales Sydney NSW Australia

Currently, there are significant challenges faced by the farming industry, not least of which are a reduction in the available labour workforce, and a more 'corporate' style of farming. Such factors demand an increase in farming efficiency and productivity. This paper looks forward to the not too distant future, where the realisation of autonomous farming will aid in the farming communities surviving as well as competing in the global market. In this work, the autonomous farm is seen as a complex system-of-systems, where there is necessarily a seamless integration of requirements, bringing together the areas of robotics for autonomous farming, and precision agriculture (PA), which deals with issues of agronomy. In essence, agricultural robotics uses on-farm sensing and control to actuate autonomous farm machinery with the aim of satisfying agronomy-based objectives. We initially describe a system-of-systems architecture, or unified framework, where a vital building block is the existence of two data sets used as links, or communication, between the various sub-systems. These data sets include a precision farming data set (PFDS) formed off-line before crop cultivation, containing spatially precise navigation data for any and all autonomous machinery, and a precision agriculture data set (PADS), which is a continually evolving entity consisting more of agronomy data in relation to the crop. Secondly, research undertaken in autonomous farm machinery is highlighted, where we present a foundation for the autonomous and robust control of articulated farm vehicles for real-time trajectory tracking in the presence of uncertain conditions. Preliminary results are shown, highlighting the autonomous control of vehicles for the operations of crop seeding and non-herbicidal weeding.

关键词： Agricultural machinery Crops Robot sensing systems Agriculture Remotely operated vehicles Mobile robots Machinery production industries Productivity Globalization communication system control

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Archimede: Integrated network-Centric Harbour Protection System

Archimede: Integrated Network-Centric Harbour Protection Sys...

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International Waterside Security conference (WSS)

作者： Matteo Cresta Enrico Storti Enrico Simetti Giuseppe Casalino SELEX Sistemi Integrati GmbH Genoa Italy Department Communication Computer & System Sciences DIST Genoa Italy

Confined/inshore waters may represent the best type of environment for the conduct of clandestine operations, especially from the sea: the features of such an environment weaken the detection and identification processes carried out by the defenders, while allowing the covert execution of illegal activities, as well as a better exploitation of surprise. The most significant illegal activities conducted in such an environment include infiltration, drugs/weapons smuggling, sabotage/disruption of infrastructures, up to terrorist acts; these activities are accomplished through the use of a variety of means of transportation, which include cigarette boats and power boats, rigid hull inflatable boats (RHIBs), Ashing vessels, sailing/leisure boats, midgets, swimmers/divers (with open/closed breathing systems), and swimmer delivery vehicles (SDV). Requirements as flexibility, rapid reaction, resilience, fast deployment, high level automation, modularity, plug & play have a key role in modern surveillance architecture definition. The paper will describe the guidelines adopted to develop a CIP (Critical Infrastructure Protection) tactical architecture in accordance with the previous requirements. The CIP system integrates different types of sensors (e.g. radar, IR, TV, SONAR, underwater acoustic network) and classes of vehicles (Surface, Underwater, Air Unmanned Vehicles) which cooperate in a multi environmental scenario (above water, under water, sea surface, ground and air). The focus is to develop the following functionalities: fuse, classify, identify and present all the data provided by the sensors and consequently generate warnings on the Command and control (C2) and interact automatically with the console. The integration is performed to guarantee flexibility and modularity by means of tactical gateways developed in order to decouple the C2 system from sensor systems and vehicles. In particular, these gateways are designed to translate the subsystem proprietary data in

关键词： Vehicles Radar tracking Surveillance Sensor systems Logic gates Computer architecture

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