• Title/Summary/Keyword: Mobile IP Multicast

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Mobile IP Multicast Protocol Losing Local Broadcast (로컬 브로드캐스트를 이용한 이동 IP 멀티캐스트 프로토콜)

  • 차용주;김화종
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.26 no.12C
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    • pp.208-217
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    • 2001
  • In mobile Internet environment, providing multicast requires much more complex mechanism comparing with the unicast Mobile IP routing protocol. This is because multicast datagrams are sent to a group address that do not belong to a specific network. The IETF Mobile IP suggested two approaches for mobile multicasting, namely remote subscription and hi-directional tunneling. In remote subscription, a mobile node may join a group via a local multicast router on the visited subnet. Therefore remote subscription may cause much datagram loss while reconstructing the delivery tee. In bi-directional tunneling, a mobile node may join a group via a hi-directional tunnel to its home agent. Bi-directional tunneling may suffer from inefficient routing. In this paper, we proposed a new mobile multicasting protocol, Mobile If Multicast using Local Broadcast(MIMLB) which can receive multicast datagrams as fast as possible and optimize routing path for multicast delivery. The MIMLB protocol uses hi-directional tunneling to receive multicast datagrams. And the MIMLB protocol can resolve datagram duplicated problem and optimize routing path by using local broadcast. Simulation results show that MIMLB reduces delivery path length and optimizes multicast routing path when a mobile nod? moves into a foreign network.

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An Implementation of Explicit Multicast with Mobile IP for Small Group Communications in Mobile Networks (이동통신환경에서의 소규모 그룹통신을 위한 XMIP 프로토콜의 구현)

  • PARK IN-SOO;PARK YONG-JIN
    • The KIPS Transactions:PartC
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    • v.12C no.2 s.98
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    • pp.267-280
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    • 2005
  • In this paper, we implement and verify XMIP integrating IETF Mobile IP and the Explicit Multicast mechanism for a great number of small group multicast communications. U a source node sends Xcast packets explicitly inserting destination nodes into the headers, each Xcast router decides routes and forwards the packets toward each destination node based on unicast routing table without the support of multicast trees. n is a straightforward and simple multicast mechanism just based on a unicast routing table without maintaining multicast states because of the inheritance from the Explicit Multicast mechanism. This research modifies and extends the functionality of IETF Mobile IP's mobility agents, such as HA/FA to HA+/FA+ respectively, considering interworking with Xcast networks. Xcast packets captured by HA+ are forwarded into X-in-X tunnel interfaces for each FA+ referred to the binding table of HA.. This X-in-X tunneling mechanism can effectively solve the traffic concentration problem of IETF Mobile IP multicast services. Finally WLAN-based testbed is built and a multi-user Instant messenger system is developed as a Xcast application for finally verify the feasibility of the implemented XMIP/Xcast protocols.

Preconfigured Multicast Delivery Tree in Mobile IP (Mobile IP에서 기설정된 전달 트리를 이용한 멀티캐스팅 방안)

  • C.B. Chun;C.H. Kang;Lee, J.H.;Kwon, K.H.;Kim, B.S.;Hong, J.P.
    • Proceedings of the Korean Information Science Society Conference
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    • 2002.10e
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    • pp.76-78
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    • 2002
  • Multicasting over mobile IP network becomes more important with the increasing needs of supporting multimedia services in mobile network. The IETF has suggested two approaches which are remote subscription and bidirectional tunneling for supporting mobility management in multicasting over mobile IP. But these protocols have problems - the frequent reconstruction of multicast delivery tree, packet less during handoff, convergence problem, and so on. In this paper, we propose to use preconfiguration of multicast delivery tree when mobile host enters the foreign network. It will decrease the frequency of multicast delivery tree reconstruction, and reduce the packet loss during handoff, Also the multicast delivery tree maintained by Keep Alive messages makes the signaling overload of networks diminished.

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On NeMRI-Based Multicasting for Network Mobility (네트워크 이동성을 고려한 NeMRI 기반의 멀티캐스트 라우팅 프로토콜)

  • Kim, Moon-Seong;Park, Jeong-Hoon;Choo, Hyun-Seung
    • Journal of Internet Computing and Services
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    • v.9 no.2
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    • pp.35-42
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    • 2008
  • Mobile IP is a solution to support mobile nodes, however, it does not handle NEtwork MObility (NEMO). The NEMO Basic Support (NBS) protocol ensures session continuity for all the nodes in the mobile network. Since the protocol is based on Mobile IP, it inherits the same fundamental problem such as tunnel convergence, when supporting the multicast for NEMO. In this paper, we propose the multicast route optimization scheme for NEMO environment. We assume that the Mobile Router (MR) has a multicast function and the Nested Mobile Router Information (NeMRI) table. The NeMRI is used to record o list of the CoAs of all the MRs located below it. And it covers whether MRs desire multicast services. Any Route Optimization (RO) scheme can be employed here for pinball routing. Therefore, we achieve optimal routes for multicasting based on the given architecture. We also propose cost analytic models to evaluate the performance of our scheme. We observe significantly better multicast cost in NEMO compared with other techniques such as Bi-directional Tunneling, Remote Subscription, and Mobile Multicast based on the NBS protocol.

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Design and Analysis of Mobile-IPv6 Multicasting Algorithm Supporting Smooth Handoff in the All-IP Network (All-IP망에서 Smooth Handoff를 지원하는 Mobile-IP v6 멀티캐스팅 알고리즘의 설계 및 분석)

  • 박병섭
    • The Journal of the Korea Contents Association
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    • v.2 no.3
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    • pp.119-126
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    • 2002
  • The QoS(Quality of Service) guarantee mechanism is one of critical issues in the wireless network. Real-time applications like VoIP(Voice over IP) in All-IP networks need smooth handoffs in order to minimize or eliminate packet loss as a Mobile Host(MH) transitions between network links. In this paper, we design a new multicasting algorithm using DB(Dynamic Buffering) mechanism for Mobile-IPv6. A key feature of the new protocol is the concepts of the DB and MRA(Multicast Routing Agent) to reduce delivery path length of the multicast datagram. Particularly, the number of tunneling and average routing length of datagram are reduced relatively, the multicast traffic load is also decreased.

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A New Multicast Routing Protocol for Multicast Delivery Agent-based Mobile-IPv6 in 3GPP2 IMT-2000 System (3GPP2 IMT-2000 시스템에서 멀티캐스트 전달 대리자 기반의 새로운 Mobile-IPv6 멀티캐스트 라우팅 프로토콜)

  • Park, Byeong-Seob;Kim, Sung-Soo
    • Journal of KIISE:Information Networking
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    • v.29 no.1
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    • pp.15-23
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    • 2002
  • We present a new MDA-based Mobile-IPv6 multicast routing algorithm for wirelese service operators to offer Mobile-IP over IMT-2000 service under IMT-2000 network by taking advantage of the existing infrastructure for IMT-2000 multimedia application services. The extended IMT-2000 system architectures use an PDSNs (i.e. IWFs), and the home network (i.e. Internet) backbone and intermediate network are composed of ATM entities. A key feature of the new protocol is the use of MDA(Multicast Delivery Agent) to reduce delivery path length of the multicast datagram. We show that proposed protocol is efficient in terms of various performance measures such as multicast traffic load, multicast related handoff, and average routing length when we implement it using the Mobile-IPv6. Particularly, the number of tunneling and average routing length of datagram are reduced relatively, the multicast traffic load is also decreased.

Explicit Multicast for Small Group Communications in Heterogeneous Mobile Networks (이종 모바일 네트워크에서의 소규모 그룹 통신을 위한 명시적 멀티캐스트)

  • Kim Wan-Tae
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.43 no.8 s.350
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    • pp.15-24
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    • 2006
  • We design and implement explicit mobile multicast, named XMIP, by enhancing explicit multicast for a great number of small group multicast communications. XMIP is a straightforward multicast mechanism without maintaining multicast states due to the inheritance from the explicit multicast based on a unicast routing. This research modifies and extends the functionality of each mobility agent of IETF Mobile IP for interworking XMIP XMIP Packets captured by an extended home agent are forwarded to each extended foreign agent through nested tunnels, named X-in-X tunnels, made by the binding table of the extended home agent. X-in-X tunneling mechanism can effectively solve the serious traffic concentration problems of Mobile IP multicast specifications. Finally heterogeneous mobile networks as an XMIP testbed including CDMA2000 1X EV-DO and WLAN are actually established, and a multi-user instant messenger system for small group communications is developed for verifying the feasibility of the proposed protocols.

Reliable and Efficient Multicast Protocol for Mobile IP (이동 IP 망에서 효율적인 경로설정과 신뢰성 있는 전송방법을 갖는 멀티캐스트 프로토콜)

  • 조형상;신석재;유상조
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.29 no.3B
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    • pp.349-359
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    • 2004
  • To provide multicasting service, several multicast protocols for mobile hosts have been proposed. But they include glitches such as a non-optimal delivery route, data loss when hosts move another network, therefore they have some insecure problems about multicast data transmission. In this paper, we consider these problems and propose a new reliable and efficient multicast routing protocol for Mobile If networks. The proposed protocol provides reliable multicast transmission by compensating data loss from the previous agent when a mobile host moves another network. Also it provides additional function that is directly to connect a multicast tree according to the status of agents. It provides more efficient and optimal multicast path. The performance of the proposed protocol is proved by simulation of various conditions.

(A Multicast Tree Extension Scheme in Mobile IP) (Mobile IP에서 멀티캐스트 트리 확장 방법)

  • Kim, Byung-Soon;Han, Ki-Jun
    • Journal of KIISE:Information Networking
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    • v.30 no.3
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    • pp.307-315
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    • 2003
  • This paper proposes a Multicast Tree Extension (MTE) scheme for multicast in IP-based wireless networks. If a group receiver Joins a multicast group in a visited foreign network, multicast service may be disrupted when the foreign network does not have a multicast router. To avoid disruption, our scheme creates a bi-directional tunnel between the previous foreign agent (FA) and new foreign agent, if a mobile node (MN) moves from a foreign network with multicast capability to another foreign network with non-multicast capability. The MN thus continues to receive the multicast packets through the tunnel from the previous FA. Our scheme can avoid a long latency due to a long tunneling for group membership as well as multicast service disruption, even if the MN enters foreign networks with non-multicast capability. Simulation results show that our scheme offers lower costs for multicast delivery, tunneling and handoff latency than the existing scheme.

Study on Mobile Multicast Support over Mobile IPv6 Networks (Mobile IPv6 망에서 이동 멀티캐스트 지원 방안에 관한 연구)

  • 변태영;김성희
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.7 no.6
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    • pp.1187-1193
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    • 2003
  • The interest for IPv6, which is next generation IP, increases, while the difficulty for adopting it into IT industries also increases too. We also expect that Internet technologies develop on basis of All-IP networks, which include various heterogeneous networks. Therefore, it is necessary for network to support mobility and multicast capability to create applications with wide-variety. In this paper, we propose a new mobile multicasting protocol called Mobile IPv6 Multicast Protocol(MIMP). The proposed scheme satisfies no packet losses from roaming and optimal routing efficiency.