• Title, Summary, Keyword: IWF

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무선 인터넷 정보기술 분석 및 동향

  • 우훈식
    • Proceedings of the CALSEC Conference
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    • pp.401-410
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    • 2001
  • 개요 유무선 인터넷 망 연동 무선에서의 ISP (MISP: Mobile ISP) 의미 이동통신사 과점에서 경쟁 체제로 (nTop, magicN, ez-i) MIDC 사업자 출현 (KT, 데이콤, 하나로) WAP, 컨텐트 컨버팅, 과금 서비스 문제점 접속 지점 (IWF, G/W) 접속 대가 접속 대상(중략)

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Bacterial Multiplications and Electrophoretic Patterns of Soluble Proteins in Compatible and Incompatible Interactions of Pepper Leaves with Xanthomonas campestirs pv. vesicatoria (Xanthomonas campestris pv. vesicatoria에 감염된 고추잎의 친화적, 불친화적 반응에서 세균증식과 수용성 단백질의 전기영동 패턴)

  • 이연경;김영진;황병국
    • Korean Journal Plant Pathology
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    • v.10 no.4
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    • pp.305-313
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    • 1994
  • Typically susceptible lesions were developed on pepper (cv. Hanbyul) leaves inoculated with the compatible strains Ds 1 of Xanthomonas campestris pv. vesicatoria. The lesions appeared first water-soaked and then turned yellow with a chlorotic area. In contrast, the leaves inoculated with the incompatible strain 81-23 initially turned yellow and then developed local necrosis. Multiplication of x. c. pv. vesicatoria in pepper leaves also were distinctly different between the two strains. The strain Ds 1 multiplied more greatly than did the strain 81-23 in the infected leaves. X. c. pv. vesicatoria infection of pepper leaves induced the synthesis of soluble proteins, especially more greatly in the compatible than in the incompatible interactions. Some pathogenesis-related (PR) proteins were detected in the intercellular washing fluid (IWF) and extracts of the infected pepper leaves. In particular, the 32 kDa protein on SDS-PAGE gels appeared intensely in the incompatible interaction. In contrast, some proteins with moluecular masses of 65, 71, and 75 kDa disappeared in the infected pepper leaves. Isoelectric focusing could identify the pIs of soluble proteins in infected pepper leaves. The accumulation of the IWF from infected leaves was more conspicuous in the incompatible than the compatible interaction. These results suggest that some extremely acidic and basic proteins were induced and accumulated in the intercellular spaces of infected pepper leaves.

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A Variability Description Technique for Software Product Line: OVDL (소프트웨어 프로덕트라인 가변성 기술 기법: OVDL)

  • Lee, Ji Hyun;Kang, Sung Won
    • KIPS Transactions on Software and Data Engineering
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    • v.2 no.11
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    • pp.739-746
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    • 2013
  • Variability of the software product line that differentiates member products within a product line must be described with precise meaning and visualized so as easy to select. Moreover, it should be easy to manage. Variability description approaches can largely be divided into two approaches, integrated variability description approach and orthogonal variability description approach. Orthogonal Variability Description Language (OVDL) was developed for clear and precise description of variability without ambiguity. This paper validates the variability description capability of OVDL by translating the variability models of Inter-Working Function (IWF) product line described by using Orthogonal Variability Model (OVM) notations into variability descriptions in OVDL.

Development of Inter-Working Function Unit for the Advanced TDX Remote Subscriber Systems (TDX 고도화 시스팀 원격가입자 정합장치 개발)

  • 황우근;우창희;류영일
    • Proceedings of the IEEK Conference
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    • pp.299-302
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    • 2000
  • In this paper, a Inter-Working Function Unit(IWF) has been developed and designed in order to change to advanced subscriber system the Remote Subscriber System(RSS) that is operating with simple services(PSTN Function only). Regarding the cost and the effectiveness, RSS should be connected to Access Subscriber System with PCM cables directly. As this method being used, in the period of Retrofit, the connecting job covering RSS will be handled easily and safely.

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Design and Implementation of Web-based ATM/FR Integrated Network Management System (웹 기반의 ATM/FR 통합 망관리 시스템 설계 및 구현)

  • 조상진;백종욱;박종태;김화준
    • Proceedings of the Korean Information Science Society Conference
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    • pp.298-300
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    • 2000
  • 고속의 셀 스위칭 기술인 ATM 망의 확대호 인하여 기존 망 및 서비스와의 연동이 중요한 문제로 대두되고 있다. ATM 망이 기간 망으로 적용되더라도 기존의 백본망으로 사용되고 있는 FR(Frame Relay)망은 계속 존재 할 것으로 예상? 때문에 이들 망의 연동은 필수적이다. ATM/FR 간의 연동 규격은 FR Forum과 ITU-T에서 조금씩 다르게 정의되고 있고 다양한 연동 방식과 다중화 방식이 있기 때문에 이를 통합적으로 관리 할 수 있는 도구가 필요하다. 본 논문에서는 Web 기반의 망관리 시스템을 설계하고, ATM/FR 연동을 IWF를 이용해서 통합 관리하는 구조를 설계하고 구현한다.

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A Study on Mobile-IP-based Interworking Model for IMT-2000 Network (IMT-2000망을 위한 Mobile-IP기반 연동모델에 대한 연구)

  • 박병섭;이동철
    • The Journal of the Korea Contents Association
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    • v.2 no.2
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    • pp.85-90
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    • 2002
  • This paper presents tuo implementation models for wireless service operators to offer Mobile-IP over IMT-2000 Data service under IMT-2000 network by taking advantage of the existing infrastructure for IMT-2000 services. For this purpose, a new Mobile-IP over IMT-2000-based protocol architectures are introduced and service operation schemes and handoff schemes according to various scenarios of packet data services in the IMT-2000 core network are presented. Also, this paper describes the handoff scheme in terms of channel states.

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Propose new native lingura address system for mobile systemronment (유무선 통합을 위한 새로운 자국어 주소이름체계의 접속방식 제안)

  • Kim, Young-Gi;Chin, Yong-Ohk
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.11 no.12
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    • pp.2249-2255
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    • 2007
  • In this paper, propose WINC system for internet site connection and native lingua address system that can supplement shortcoming in Mobile System. This wish to improve user's intuition for menu connection in cellular phone environment and convenience by introducing already use Hangul keyword Internet address system.

Mobile ATM: A Generic and flexible network infrastructure for 3G mobile services

  • Jun Li;Roy Yates;Dipankar Raychaudhuri
    • Journal of Communications and Networks
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    • v.2 no.1
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    • pp.35-45
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    • 2000
  • this paper presents the concept of "mobile ATM', a proposal for third-generation (3G) mobile communication network infrastructure capable of supporting flexible evolution of radio technologies from today's cellular and data services towards future wireless multimedia services. Mobile ATM provides generic mobility management and QoS-based transport capabilities suitable for integration of multiple radio access technologies including cellular voice. wireless data, and future broadband wireless services. The architecture of a mobile ATM network is outlined in terms of the newly-defined "W-UNI" interface at the radio link and "M-UNI"and "M-UNI" interface which supports unified access for WATM and non-ATM mobile terminals through corresponding interworking functions (IWF) is explained. leading to an understanding of how different radio access technologies are supported by the same ATM-based core network infrastructure. Generic mechanisms for handoff and location management within the core mobile network are discussed. and related protocol extensions over the "W-UNI" and "M-UNI/NNI"interfaces are proposed. the issue of "crossover switch (COS)" selection in mobile ATM is considered, and a unified handoff signaling syntax which supports flexibility in COS selection is described. Typical signaling sequences for call connection and handoff using the proposed protocols are outlined. Experimental results form a proof-of-concept mobile ATM network prototype are presented in conclusion.

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A Study of the Interworking Method between H.323 and SIP (H.323과 SIP간의 상호 연동 방법 관한 연구)

  • 김정석;김철규;김정호
    • Proceedings of the Korea Contents Association Conference
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    • pp.342-347
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    • 2004
  • The VoIP(Voice over Internet Protocol) technology which is able to use a voice service through internet is more cheaper then existing telephone charges, and is easily accept the various of multimedia services from internet. Previous connection method of VoIP used H.323 protocol, but it is very complex to connection establishment. so, the SIP(Session Initiation Protocol) protocol that propose in SIP-Working Group Is in use recently. Therefore, we need new interworking methodology between H.323 and SW products. In this thesis, the progress interworking method between H.323 and SIP are propose, then interpret unnecessary packet delay for call setup and improved feature of message exchange.

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Integrated FR traffic policing mechanism in a FR-ATM Interworking (FR-ATM 연동에서 Frame Relay 트래픽 통합 감시제어 방안)

  • Nam, Yun-Seok;Gang, Beop-Ju
    • The KIPS Transactions:PartC
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    • v.9C no.3
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    • pp.407-412
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    • 2002
  • A FR-ATM interworking function that has FR and ATM interfaces, should guarantee the QoS of both frame relay and ATM networks. The IWF requires the policing mechanisms for FR and ATM respectively, and needs to map the traffic parameters each other. In this case, traffic parameter mapping and policing function are performed independently. In the aspect of FR traffic policing, this function degrades processor performance if it is worked by software, or includes additional hardware function. The best way to solve this is to integrate this function into ATM function because ATM is performed by well defined hardware already. In this paper we propose the integrated traffic control mechanism. That is, frames are segmented to cells first, and then policing mechanism is applied to the cells to guarantee the FR QoS. Therefore proper policing algorithm is essential to the integrated FR traffic mechanism. The evaluations are done with simulations in comparison of existing FR algorithms, ATM VBR and GFR policing algorithms, and the proposed algorithm.