• Title/Summary/Keyword: Multimedia Resource Management

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Resource Management Scheme for Improvement of Reliability and Connectivity in wireless USB System (무선 USB 시스템에서 신뢰성과 연결성 향상을 위한 자원 관리 기법)

  • Kim, Jin-Woo;Jeong, Min-A;Lee, Seong Ro
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.39C no.11
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    • pp.1159-1166
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    • 2014
  • In this paper, a resource management scheme for enhancing the network connectivity and reliability in wireless USB system is proposed. Wireless USB protocol is suitable for the application that supports the real-time multimedia service in Ship Area Network since it supports high speed data transfer. However, the device's mobility is caused the dramatic change of link state and network topology, and is occurred the degradation of network performance. Therefore, a resource management scheme for wireless USB system is proposed in this paper. The proposed technique can intelligently treat the change of link state, and solve the degradation of network performance. The simulation results show that proposed protocol can enhance the throughput and delay performance by selecting relay device with better link state.

Efficient Access Management Scheme for Machine Type Communications in LTE-A Networks (LTE-A 네트워크 환경에서 MTC를 위한 효율적인 접근관리 기법)

  • Moon, Jihun;Lim, Yujin
    • Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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    • v.7 no.1
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    • pp.287-295
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    • 2017
  • Recently, MTC (Machine Type Communication) is known as an important part to support IoT (Internet of Things) applications. MTC provides network connectivities between MTC devices without human intervention. In MTC, a large number of devices try to access over communication resource with a short period of time. Due to the limited communication resource, resource contention becomes severe and it brings about access failures of devices. To solve the problem, it needs to regulate device accesses. In this paper, we present an efficient access management scheme. We measure the number of devices which try to access in a certain time period and predict the change of the number of devices in the next time period. Using the predicted change, we control the number of devices which try to access. To verify our scheme, we conduct experiments in terms of success probability, failure probability, collision probability and access delay.

Adaptive Partitioning based Downlink Call Admission Control in 3G LTE (3G LTE의 Adaptive Partitioning 기반 다운링크 호 수락제어 방식)

  • Jun, Kyung-Koo
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.32 no.6A
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    • pp.565-572
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    • 2007
  • 3G Long Term Evolution (3G LTE) is a next generation cellular networks system capable or providing various mobile multimedia services by using OFDMA and MIMO based radio access technology. Among many differences from existing WCDMA based systems, the facts that 3G LTE uses Physical Resource Block (PRB) as its radio resources and provides all services through the PS domain make the development of new resource management schemes necessary. This paper proposes an adaptive partitioning based downlink call admission control scheme. It separates realtime call requests from non-realtime ones, specifies maximum allowable resource amounts for each type, but if the maximum is exceeded, call requests are accepted with probability proportional to remaining resource amounts. Despite the fact that such adaptive concept has been already adopted by other call admission schemes, the contributions of our paper, which are that we are able to find an efficient way to apply the proposed scheme exploiting PRB characteristics and measure the resource usage of base stations by PRB utilization and payload ratio, are still valid. When judging from simulation results in comparison with others, our scheme is able to prioritize realtime call requests over non-realtime ones, and at the same time, overall system performance is superior.

A Study on QoS Measurement & Evaluation for MPEG Transmission in Network (통신망에서 MPEG 영상 전송을 위한 QoS 측정 및 평가에 관한 연구)

  • Suh Jae-Chul
    • Journal of Digital Contents Society
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    • v.3 no.1
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    • pp.101-111
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    • 2002
  • Lately development of network around Internet expands range of data traffic to multimedia information, and so for the guarantee of multimedia services end-to-end QoS(Quality of Service) must service because comparing with existing Internet service can not support For satisfying those QoS requirements, network have to guarantee not only network on parameter, such as delay, jitter, throughput but also system resources like CPU utilization, memory usage. Therefore it is urgent to develop QoS based middleware to distribute multimedia data and maximize network utilization in the limited resource environment. And it must be necessary of network to provide end-to-end QoS(Quality of Service) for multimedia applications. Multimedia applications want that QoS which satisfy their own service properties be guaranteed Then, We must analyze those necessary QoS requirements md define QoS parameter which specify as two viewpoint, user's and network's perspective. Therefore network provider supplying network for usual user and university, enterprise must want to find about their own network performance and problem. It is essential for network manager to want to use a tool like this. On the basis of technique about QoS test-bed in the AIM network, We studied on the method of QoS measurement and management about end-to-end connection in the Internet. We measured network status about end-to-end connection and analyze the result of performance.

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Investigation of Domestic and Foreign Forest Resource Management Status and Analysis of Laser Scanning Technology Application (국내외 산림자원관리 현황 조사 및 레이저 스캐닝 기술의 산림적용 방안 분석)

  • Park, Joon-Kyu;Lee, Keun-Wang
    • Journal of Digital Convergence
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    • v.19 no.11
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    • pp.391-396
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    • 2021
  • In this study, items for forest policy and forest resource research in Austria, Japan, New Zealand, and Indonesia, which are major forest advanced countries, were investigated, and the applicability of point cloud data acquired through laser scanning was identified. Through the study, it was found that forest policies in developed countries are being pursued for the purpose of sustainable forest conservation and management, job creation, and timber productivity improvement, and that new technologies are being researched and applied to actual projects. Korea has a high proportion of forests compared to the national land area compared to major forestry developed countries, but the accumulation of trees is relatively low, so it is a time for scientific forest management to improve the accumulation of trees. To understand the applicability of laser scanning technology, a forest resource survey using point cloud data was conducted, and the diameter of breast height, height, number of trees per unit area were calculated, and the shape of the crown was identified. If field experiments and accuracy evaluations applying various laser scanning technologies are carried out in the future, it will be possible to present the quantitative improvement of forest resource survey using foil cloud.

Formal Models of Module Linking Mechanisms for a Single Address Space

  • Kim, Hiecheol;Hong, Won-Kee
    • Journal of Korea Society of Industrial Information Systems
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    • v.19 no.2
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    • pp.51-58
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    • 2014
  • As WSNs(Wireless Sensor Networks) are being deployed widely in diverse application areas, their management and maintenance become more important. Recent sensor node software takes modular software architectures in pursuit of flexible software management and energy efficient reprogramming. To realize an flexible and efficient modular architecture particularly on resource constrained mote-class sensor nodes that are implemented with MCUs(Micro-Controller Units) of a single address space. an appropriate module linking model is essential to resolve and bind the inter-module global symbols. This paper identifies a design space of module linking model and respectively their implementation frameworks. We then establish a taxonomy for module linking models by exploring the design space of module linking models. Finally, we suggest an implementation framework respectively for each module linking model in the taxonomy. We expect that this work lays the foundations for systematic innovation toward more flexible and efficient modular software architectures for WSNs.

Multimedia Home Network Middleware for Isochronous Connection Management based on IEEE1394-IEC61883 (IEEE 1394-lEC61883 기반 멀티미디어 홈 네트워크에서 등시성 연결 관리를 위한 미들웨어)

  • Lee Dong Kyu;Oh joo Yong;Park Jun Ho;Kang Soon Ju
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.29 no.12B
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    • pp.1042-1051
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    • 2004
  • The IEEE1394 is a favorable protocol for A/V networks recently in home and there are two types of transmission in this protocol which are asynchronous and isochronous. The more nodes participate in the IEEE1394 network, the more problems of resource exhaustion and connection repetition may occur. So this paper proposes a middleware for isochronous connection management and reliable multimedia data transmission in the IEEE1394-IEC61883 based home networks. In this paper, proposed middleware is supporting the various types of isochronous connection, guaranteeing the reliability of isochronous connection and providing the characteristic of a real-time data transmission. We support CORBA API for multimedia service and the proposed architecture was implemented using a test-bed and we verified the proposed architecture in a test-bed.

Overlay Multicast Mechanism Supporting Differentiated QoS According to Service Level and User Environment over NGN (차세대네트워크 환경에서 서비스 등급 및 사용자 환경에 따른 차별화된 QoS를 지원하는 오버레이 멀티캐스트)

  • Rhee, Bo-Young;Cho, Sung-Chol;Han, Sun-Young
    • The KIPS Transactions:PartC
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    • v.15C no.6
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    • pp.557-566
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    • 2008
  • NGN(Next Generation Network) is a communication network which can make use of broadband and QoS-enabled transport technologies. One of the main service issues over NGN is a multimedia service, such as IPTV, using a multicast method. And overlay multicast technology is one of the promising solutions instead of traditional multicast technology which has a few problems, and supports flexibility and scalability for multicast services. Also, the main controversial topic in NGN and overlay multicast is QoS. In the present paper, we designed an agent in each receiver's network, and a manager which is in a source network and which manages the whole multicast network. Both of them are communicating with each other and applying resource policies to their multicast network. This mechanism enables overlay multicast to support QoS, focusing on RACF(Resource and Admission Control Functions) in NGN QoS architecture.

Performance Analysis of Policy-based QoS Algorithm in the IMS (IMS에서 정책기반 QoS 알고리즘의 성능 분석)

  • Han, Seok-Jun;Shon, Hyung-Doh;Kang, Seung-Chan
    • Journal of IKEEE
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    • v.19 no.2
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    • pp.133-141
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    • 2015
  • The IMS is an architectural control framework for delivering IP multimedia services such as voice, video, audio and data, the IMS supports not only the mobile communication system but also the existing wired and wireless network based on IP. The network that is integrated by the IMS needs policy-based network management protocol for managing the limited network resources to provide efficient multimedia service. The IMS use additional device called PDF for efficient resource management, but the PDF only uses diameter which is one of the network management protocol such as SNMP and COPS. Many devices use various protocol to manage the limited network resources. There is an algorithm using a variety of protocols such as Diameter, COPS and SNMP to handle the resources management efficiently. We also analyze the performance using the proposed algorithm in the implemented IMS environment.

The APIs Design for the Database Management of the Network Game Using Design Patterns (디자인 패턴을 적용한 네트워크 게임의 DB 관리 APIs 설계)

  • Kim Jong-Soo;Kwon Oh-Jun;Kim Tai-Suk
    • Journal of Korea Multimedia Society
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    • v.9 no.1
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    • pp.101-108
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    • 2006
  • Developing a network game that is serviced on the internet requires a lot of work, time and manpower. Therefore, it is important to design a game in such a way so that existing design codes could be used. The database for the multi-player network game is accessed from many clients. To manage the resource effectively, it is required to design the APIs to be minimized the database access and to be dealt with the related data efficiently. For this, it is needed to apply the object-oriented design for the related software modules. In the paper, we propose the design patterns of GoF to implement the APIs thatis needed to deal with the database resource. The database design through the analysis of some game's GUI has the advantage to create the optimized schema set more quickly, because it minimize the review step and the modification step of the database design generally. In addition, we apply to the design patterns of GoF for the APIs design of the server-side database. These reduce the times of the program call between the game server and the database server. These also make easily the maintenance for the already developed APIs, and it makes easily the addition of new APIs.

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