• Title/Summary/Keyword: Real-time Data Services

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A Capacity Planning Framework for a QoS-Guaranteed Multi-Service IP network (멀티서비스를 제공하는 IP 네트워크에서의 링크용량 산출 기법)

  • Choi, Yong-Min
    • 한국정보통신설비학회:학술대회논문집
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    • 2007.08a
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    • pp.327-330
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    • 2007
  • This article discusses a capacity planning method in QoS-guaranteed IP networks such as BcN (Broadband convergence Network). Since IP based networks have been developed to transport best-effort data traffic, the introduction of multi-service component in BcN requires fundamental modifications in capacity planning and network dimensioning. In this article, we present the key issues of the capacity planning in multi-service IP networks. To provide a foundation for network dimensioning procedure, we describe a systematic approach for classification and modeling of BcN traffic based on the QoS requirements of BcN services. We propose a capacity planning framework considering data traffic and real-time streaming traffic separately. The multi-service Erlang model, an extension of the conventional Erlang B loss model, is introduced to determine required link capacity for the call based real-time streaming traffic. The application of multi-service Erlang model can provide significant improvement in network planning due to sharing of network bandwidth among the different services.

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Low-Complexity MPEG-4 Shape Encoding towards Realtime Object-Based Applications

  • Jang, Euee-Seon
    • ETRI Journal
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    • v.26 no.2
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    • pp.122-135
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    • 2004
  • Although frame-based MPEG-4 video services have been successfully deployed since 2000, MPEG-4 video coding is now facing great competition in becoming a dominant player in the market. Object-based coding is one of the key functionalities of MPEG-4 video coding. Real-time object-based video encoding is also important for multimedia broadcasting for the near future. Object-based video services using MPEG-4 have not yet made a successful debut due to several reasons. One of the critical problems is the coding complexity of object-based video coding over frame-based video coding. Since a video object is described with an arbitrary shape, the bitstream contains not only motion and texture data but also shape data. This has introduced additional complexity to the decoder side as well as to the encoder side. In this paper, we have analyzed the current MPEG-4 video encoding tools and proposed efficient coding technologies that reduce the complexity of the encoder. Using the proposed coding schemes, we have obtained a 56 percent reduction in shape-coding complexity over the MPEG-4 video reference software (Microsoft version, 2000 edition).

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Design of gCRM system integrated with LBS

  • Park, Key-Ho;Jung, Jae-Gon;Hwang, Myung-Hwa
    • Spatial Information Research
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    • v.10 no.4
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    • pp.567-578
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    • 2002
  • The success of gCRM depends on the availability of adequate, real-time data about customers' location and the provision of diverse value-added services utilizing it. In the existing gCRM systems, however, it seems that the positional precision of customers' location is very low, and further that the services based on real-time location data are not provided. In order to overcome these weaknesses and extend the limited scope of gCRM, we suggest a new design of gCRM system integrated with LBS. We also describe in some detail the system prototype for such an integration.

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A Study on the Development of AVCS(Airside Vehicle Control System) in Gimpo Airport Based on RTK-GPS (RTK-GPS 기반의 김포공항 이동지역 차량통제 시스템 개발방안 연구)

  • Sanghoon Cha;Minguan Kim;Jeongil Choi
    • Journal of Information Technology Services
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    • v.22 no.3
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    • pp.85-100
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    • 2023
  • The development of Airside Vehicle Control System(AVCS) at Gimpo Airport aims to reduce ground safety accidents in movement area and improve airport operation efficiency and safety management service quality. The vehicle is controlled by a brake controller RTK-antenna and On-Board Diagonostics(OBD) module. Location data is transmitted to a nearby communication base station through a Wi-Fi router and the base station is connected to the AVCS by an optical cable to transmit location data from each vehicle. The vehicle position is precisely corrected to display information using the system. The system allows airport operators to view registered information on aircraft and vehicles and monitor their locations speeds and directions in real time. When a vehicle approaches a dangerous area alarm warnings and remote brake control are possible to prevent accidents caused by carelessness of the driver in advance.

The Empirical Study on Practical Use of V-Services through RFID in University (대학에서의 RFID를 통한 u-서비스의 활용에 관한 실증연구)

  • Bae, Seon-Mi;Jang, Hyeong-Uk;Lee, Sang-Sik
    • Proceedings of the Korean Society for Quality Management Conference
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    • 2006.11a
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    • pp.67-72
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    • 2006
  • In this paper, we attempt to investigate the factors influencing usage and acceptance of ubiquitous services in Campus, based on the Technology Acceptance Model(TAM). This study conceptualizes and develops three dimensions of u-Services (real time seπice, information security, customization seπice) and tests the relationships between three dimensions of u-Services and TAM. Data were collected from 162 respondents in K-University. And relationships proposed in the framework were tested using multiple regression analysis.

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Real-Time GPU Task Monitoring and Node List Management Techniques for Container Deployment in a Cluster-Based Container Environment (클러스터 기반 컨테이너 환경에서 실시간 GPU 작업 모니터링 및 컨테이너 배치를 위한 노드 리스트 관리기법)

  • Jihun, Kang;Joon-Min, Gil
    • KIPS Transactions on Computer and Communication Systems
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    • v.11 no.11
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    • pp.381-394
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    • 2022
  • Recently, due to the personalization and customization of data, Internet-based services have increased requirements for real-time processing, such as real-time AI inference and data analysis, which must be handled immediately according to the user's situation or requirement. Real-time tasks have a set deadline from the start of each task to the return of the results, and the guarantee of the deadline is directly linked to the quality of the services. However, traditional container systems are limited in operating real-time tasks because they do not provide the ability to allocate and manage deadlines for tasks executed in containers. In addition, tasks such as AI inference and data analysis basically utilize graphical processing units (GPU), which typically have performance impacts on each other because performance isolation is not provided between containers. And the resource usage of the node alone cannot determine the deadline guarantee rate of each container or whether to deploy a new real-time container. In this paper, we propose a monitoring technique for tracking and managing the execution status of deadlines and real-time GPU tasks in containers to support real-time processing of GPU tasks running on containers, and a node list management technique for container placement on appropriate nodes to ensure deadlines. Furthermore, we demonstrate from experiments that the proposed technique has a very small impact on the system.

Spatial-Temporal Modelling of Road Traffic Data in Seoul City

  • Lee, Sang-Yeol;Ahn, Soo-Han;Park, Chang-Yi;Jeon, Jong-Woo
    • Journal of the Korean Data and Information Science Society
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    • v.13 no.2
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    • pp.261-270
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    • 2002
  • Recently, the demand of the Intelligent Transportation System(ITS) has been increased to a large extent, and a real-time traffic information service based on the internet system became very important. When ITS companies carry out real-time traffic services, they find some traffic data missing, and use the conventional method of reconstructing missing values by calculating average time trend. However, the method is found unsatisfactory, so that we develop a new method based the spatial and spatial-temporal models. A cross-validation technique shows that the spatial-temporal model outperforms the others.

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BIG DATA ANALYSIS ROLE IN ADVANCING THE VARIOUS ACTIVITIES OF DIGITAL LIBRARIES: TAIBAH UNIVERSITY CASE STUDY- SAUDI ARABIA

  • Alotaibi, Saqar Moisan F
    • International Journal of Computer Science & Network Security
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    • v.21 no.8
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    • pp.297-307
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    • 2021
  • In the vibrant environment, documentation and managing systems are maintained autonomously through education foundations, book materials and libraries at the same time as information are not voluntarily accessible in a centralized location. At the moment Libraries are providing online resources and services for education activities. Moreover, libraries are applying outlets of social media such as Facebook as well as Instagrams to preview their services and procedures. Librarians with the assistance of promising tools and technology like analytics software are capable to accumulate more online information, analyse them for incorporating worth to their services. Thus Libraries can employ big data to construct enhanced decisions concerning collection developments, updating public spaces and tracking the purpose of library book materials. Big data is being produced due to library digitations and this has forced restrictions to academicians, researchers and policy creator's efforts in enhancing the quality and effectiveness. Accordingly, helping the library clients with research articles and book materials that are in line with the users interest is a big challenge and dispute based on Taibah university in Saudi Arabia. The issues of this domain brings the numerous sources of data from various institutions and sources into single place in real time which can be time consuming. The most important aim is to reduce the time that lapses among the authentic book reading and searching the specific study material.

Wide-Area SCADA System with Distributed Security Framework

  • Zhang, Yang;Chen, Jun-Liang
    • Journal of Communications and Networks
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    • v.14 no.6
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    • pp.597-605
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    • 2012
  • With the smart grid coming near, wide-area supervisory control and data acquisition (SCADA) becomes more and more important. However, traditional SCADA systems are not suitable for the openness and distribution requirements of smart grid. Distributed SCADA services should be openly composable and secure. Event-driven methodology makes service collaborations more real-time and flexible because of the space, time and control decoupling of event producer and consumer, which gives us an appropriate foundation. Our SCADA services are constructed and integrated based on distributed events in this paper. Unfortunately, an event-driven SCADA service does not know who consumes its events, and consumers do not know who produces the events either. In this environment, a SCADA service cannot directly control access because of anonymous and multicast interactions. In this paper, a distributed security framework is proposed to protect not only service operations but also data contents in smart grid environments. Finally, a security implementation scheme is given for SCADA services.

Location Based Routing Service In Distributed Web Environment

  • Kim, Do-Hyun;Jang, Byung-Tae
    • Proceedings of the KSRS Conference
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    • 2003.11a
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    • pp.340-342
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    • 2003
  • Location based services based on positions of moving objects are expanding the business area gradually. The location is included all estimate position of the future as well as the position of the present and the past. Location based routing service is active business application in which the position information of moving objects is applied efficiently. This service includes the trajectory of past positions, the real-time tracing of present position of special moving objects, and the shortest and optimized paths combined with map information. In this paper, we describes the location based routing services is extend in distributed web GIS environment. Web GIS service systems provide the various GIS services of analyzing and displaying the spatial data with friendly user - interface. That is, we propose the efficient architecture and technologies for servicing the location based routing services in distributed web GIS environment. The position of moving objects is acquired by GPS (Global Positioning System) and converted the coordinate of real world by map matching with geometric information. We suppose the swapping method between main memory and storages to access the quite a number of moving objects. And, the result of location based routing services is wrapped the web-styled data format. We design the schema based on the GML. We design these services as components were developed in object-oriented computing environment, and provide the interoperability, language-independent, easy developing environment as well as re - usability.

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