• Title, Summary, Keyword: IMS

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Implementation of small and medium IMS Core Main System (중·소형 IMS 코어 메인 시스템 구현)

  • Kim, Sam-Taek
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.15 no.4
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    • pp.99-104
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    • 2015
  • Service platform which can offer various multimedia communication as the video, audio, voice and data is IMS(IP Multi-Media Subsystem). It is effective in the company is introducing only such convergence IMS services to be required to provide various multimedia services at the lowest cost and existing communication environment while keeping the maximum Therefore, in this study, we had developed IMS 코어 main system that not more than 1,000 employees of companies can effectively establish IMS solutions. This system is located at the middle between IMS terminal and CSCF(Call Session Control Function) in line with IMS services and provides CSCF in response to the IMS terminal and IMS terminal in response to the CSCF. As well, corded telephone and SIP phone which were used as terminal is linked with gateway.

지능형생산시스템(IMS) 기술 개발을 위한 국제 IMS 프로그램과 국내 추진 현황

  • 이영수;최병욱;이현정
    • ICROS
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    • v.3 no.4
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    • pp.33-39
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    • 1997
  • 본 글에서는 21세기를 대비한 차세대생산시스템으로 일컬어지는 지능형생산시스템(IMS: Intelligent Manufacturing System)의 기술 개발을 위해 국제공동연구로 진행되고 있는 "국제 IMS 프로그램"을 소개하고 우리나라의 추진현황에 대해서도 설명한다. 제 2절에서는 국제 IMS 프로그램의 개요로서 추진배경, IMS의 목표, 참가국 및 추진체계, 자금운영 방법 등에 대해 설명한다. 제 3절에서는 국제 IMS 프로그램에서 수행하는 프로젝트들을 소개하며, 국내의 IMS 추진전략 및 주요활동 등을 제 4절에서 설명한다.

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Design and Implementation of the Internetworking Architecture between IPv4 and IPv6 in IMS based Mobile networks (IMS기반 이동패킷망에서의 IPv4/IPv6 연동구조 설계 및 구현)

  • You, Seugn-Kwan;Kim, Young-Han
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.43 no.11
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    • pp.168-174
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    • 2006
  • In this paper, we propose an architecture for communication between the IPv4-based UA and the IPv6-based UA in IMS based Mobile Networks, and design and implement the IMS protocol Translator for verification of the architecture. For the design of the internetworking between the IPv4 and the IPv6, we analyze the transition mechanisms and investigate the protocol translator. The IMS protocol translator is composed of the IMS-ALG(IP Multimedia Subsystem - Application Level Gateway) and TrGW(Translation Gateway), and the conformance of these components are verified by experiments.

A Visual Protocol Analyzer for Session Monitoring over IMS Network (IMS 망에서 세션 모니터링을 위한 비쥬얼 프로토콜 분석기)

  • Jung, In-Hwan
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.36 no.3B
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    • pp.195-207
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    • 2011
  • In this paper, we design and implement a visual IMS protocol analyzer, VIPA(Visual IMS Protocol Analyzer), providing a graphical view of session connection information between user equipments on IMS network. The VIPA captures SIP packets, which are used to setup sessions on IMS networks, and shows graphical view of session information to provide easy way to analyze IMS protocols. The existing protocol analyzer has limitation to show only terminal side protocol analysis information. Whereas the VIPA can provide not only terminal side but also server side analysis result so that the connection status between all the session participating user agents can be monitored.

International IMS Program : Its Present and Prospectives (국제 IMS 프로그램의 현황과 전망)

  • 최병욱;박남규;이현정;이영수
    • Journal of the Korean Society for Precision Engineering
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    • v.17 no.3
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    • pp.7-14
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    • 2000
  • Intelligent Manufacturing Systems (IMS) Program is an industry-driven and government-endorsed initiative which assists and encourages the formation of international research consortia to address technical and other emerging manufacturing challenges in the 21$^{st}$ century$^{[1]}$ . The IMS initiative places special emphasis on the establishment of R&D projects which demonstrate equitable cooperation, including the protection of intellectual property. In this explanatory paper, a brief overview of the IMS Program is described, together with abstracts of some selected projects and a research result of Globeman21 project. The IMS prospective is also given.n.

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A Dynamic Routing Algorithm for Management of the IMS Nodes Using SNMP (SNMP를 이용한 IMS 노드의 동적 라우팅 알고리즘)

  • Cho, Jae-Hyoung;Lee, Jae-Oh
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.36 no.3B
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    • pp.214-219
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    • 2011
  • The IMS (IP Multimedia Subsystem) is used for providing multimedia services to network provider. The IMS is composed of many nodes, depending on their function. According to the status (fault, performance, etc.) of each node, we need to provide dynamic routing algorithm. In this paper, we propose a dynamic routing algorithm for management of the IMS nodes using SNMP based on FCAPS (Fault, Configuration, Accounting, Performance and Security) in the IMS network.

Interconnection of P2PSIP Overlay and IMS Network and Its Characteristics (P2PSIP Overlay와 IMS 네트워크간 상호접속 및 특성)

  • Kim, Hyun-Ji;Han, Chi-Moon
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.47 no.10
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    • pp.57-66
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    • 2010
  • Today the various types of communication and application service are provided by the development of Internet and IP technologies. It is expected to be extended the service domain of two networks through the interconnecting P2PSIP overlay which is highlighted as an important technologies for Internet based services and IMS(IP Multimedia Subsystem) which is the new architecture adopted in the evolution of NGN. Therefore, this paper explains the possible methods of the service expansion with interconnecting P2PSIP overlay and IMS network. Specially this paper suggests the interconnection architectures of P2PSIP overlay and IMS network as subscriber's types and analyzes the traffic analysis model and session set up delay characteristics by simulation model. As a results, this paper shows that the interconnection architecture using gateway AS(Application Server) is the excellent method to interconnect the IMS in case of P2PSIP overlay only subscriber, and that interconnection architecture using I-CSCF is good method to interconnect the IMS in case of P2PSIP overlay and IMS subscriber.

Novel optimal intensity measures for probabilistic seismic analysis of RC high-rise buildings with core

  • Pejovic, Jelena R.;Serdar, Nina N.;Pejovic, Radenko R.
    • Earthquakes and Structures
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    • v.15 no.4
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    • pp.443-452
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    • 2018
  • In this paper the new intensity measures (IMs) for probabilistic seismic analysis of RC high-rise buildings with core wall structural system are proposed. The existing IMs are analysed and the new optimal ones are presented. The newly proposed IMs are based on the existing ones which: 1) comprise a wider range of frequency velocity spectrum content and 2) are defined as the integral along the velocity spectrum. In analysis characteristics of optimal IMs such as: efficiency, practicality, proficiency and sufficiency are considered. As prototype buildings, RC high-rise buildings with core wall structural system and with characteristic heights: 20-storey, 30-storey and 40-storey, are selected. The non-linear 3D models of the prototype buildings are constructed. 720 non-linear time-history analyses are conducted for 60 ground motion records with a wide range of magnitudes, distances to source and various soil types. Statistical processing of results and detailed regression analysis are performed and appropriate demand models which relate IMs to demand measures (DMs), are obtained. The conducted analysis has shown that the newly proposed IMs can efficiently predict the DMs with minimum dispersion and satisfactory practicality as compared to the other commonly used IMs (e.g., PGA and $S_a(T_1)$). The newly proposed IMs overcome difficulties in calculating of integral along the velocity spectrum and present adequate replacement for IMs which comprise a wider range of frequency velocity spectrum content.

Interconnecting Methods of Web based IPTV Contents Provider to IMS and Its Characteristics (IMS 네트워크에 웹기반 IPTV 콘텐츠 사업자 접속 방식 및 특성)

  • Kim, Hyun-Ji;Han, Chi-Moon
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.47 no.6
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    • pp.49-57
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    • 2010
  • In the near future IPTV services will be emerged the various types through Internet, but IMS based IPTV service is one of the very attractive IPTV services. This paper describes the interconnecting architectures of Web based IPTV contents provider to IMS(IP Multimedia System) network and describes the three difference architectures as method to find its IP address. One is the architecture using DNS or HSS to find IP address of Web based IPTV contents provider and connecting gateway function to I-CSCF in IMS. The other is the architecture connecting gateway AS to ISC interface of S-CSCF in IMS. This paper describes the characteristics of traffic generating due to interconnect the Web contents provider, and the traffic model of each architectures. The proposed each architecture is emulated the session establishment delay characteristics in CoD service of IPTV by the simulation. This paper shows that the architecture connecting gateway AS to ISC interface of S-CSCF is the excellent method compare to other two methods in view of the session establishment delay.

Method to Support Handover for Service Continuity based on IMS in Wireless LAN (무선랜 환경에서 서비스 연속성 지원을 위한 IMS 기반 핸드오버 지원 방안)

  • Kim, Kam-Yong;Kim, Hwa-Suk;Choi, Seong-Gon
    • The Journal of the Korea Contents Association
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    • v.10 no.9
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    • pp.79-87
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    • 2010
  • This paper proposes a L3 handover method to minimize packet loss for supporting service continuity to IMS Terminal which has a single WLAN interface. The existing IMS based handover solution is able to support handover between different access networks in case that a terminal has multiple interfaces. That is, WLAN terminals need multiple interfaces to connect with one or more access networks. This proposed method configures IP address for the terminal in target WLAN previously by using Candidate Access Router Discovery(CARD) mechanism. Also, in the proposed method, service continuity server performs L3 connection establishment in target WLAN and registration to IMS server instead of the terminal. And then session control mechanism based on SIP is performed to support service continuity. We analyzed handover latency and signaling cost in the proposed method and existing method to show the improved performance by the proposed method.