• Title/Summary/Keyword: Mobile Multicast

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A Multicast Scheme considering the Terminal Mobility in HMIPv6 Networks (HMIPv6 네트워크에서 단말기 이동성을 고려한 멀티캐스트 방안)

  • Ha, Jeong-My;Park, Sang-Joon;Kim, Byung-Gi
    • Journal of the Korea Society for Simulation
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    • v.14 no.4
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    • pp.107-116
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    • 2005
  • The multi user communications that is called as the multicast service should be applied into the evolving mobile networks. In this paper, we propose a fast multicast management scheme for mobile terminals in HMIPv6 (Hierarchical Mobile IPv6) based mobile networks. In HMIPv6 based mobile networks, we consider the mobile terminal mobility that the multicast management scheme during mobile handover is used for the multicast routing changing. The changing impact to the multicast routing Is determined from handovers in intra AR, and in inter AR or MAP. In this paper, we propose multicast supporting schemes that the tunneling scheme is used in intra AR handover, and the previous subscription scheme is used in inter AR handover for considering the changing impact of the multicast routing.

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Multicast Routing and Cost Model with Source Mobility in Mobile IPv6 Networks (Mobile IPv6망에서 소스 이동성을 갖는 멀티캐스트 라우팅 및 비용모델)

  • Park Byoung-Seob
    • The Journal of the Korea Contents Association
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    • v.4 no.4
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    • pp.197-203
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    • 2004
  • In mobile network, the maintenance o( host grouping or the multicast delivery tree for multicasting algorithm becomes a major issues. In this paper, we explore the issues of mobile Multicast scheme using Mobile-IPv6, and addresses case when a mobile host is a source as well as a recipient of a given multicast operation using MLD(Multicast Listener Discovery) scheme, and the proposed MLD-based multicasting protocol asks its HA(Home Agent) to stop forwarding multicast for group using tunneling. We examine and compare our model to existing approaches by proposed cost model, and observe an improved ferformacne.

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Multicast Extension to Proxy Mobile IPv6 for Mobile Multicast Services

  • Kim, Dae-Hyeok;Lim, Wan-Seon;Suh, Young-Joo
    • Journal of Computing Science and Engineering
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    • v.5 no.4
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    • pp.316-323
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    • 2011
  • Recently, Proxy Mobile IPv6 (PMIPv6) has received much attention as a mobility management protocol in next-generation all-IP mobile networks. While the current research related to PMIPv6 mainly focuses on providing efficient handovers for unicast-based applications, there has been relatively little interest in supporting multicast services with PMIPv6. To provide support for multicast services with PMIPv6, there are two alternative approaches called Mobile Access Gateway (MAG)-based subscription and Local Mobility Anchor (LMA)-based subscription. However, MAG-based subscription causes a large overhead for multicast joining and LMA-based subscription provides non-optimal multicast routing paths. The two approaches may also cause a high packet loss rate. In this paper, we propose an efficient PMIPv6-based multicast protocol that aims to provide an optimal delivery path for multicast data and to reduce handover delay and packet loss rate. Through simulation studies, we found that the proposed protocol outperforms existing multicast solutions for PMIPv6 in terms of end-to-end delay, service disruption period, and the number of lost packets during handovers.

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 Efficient Mobile Multicast Mechanism based on Media Independent Handover (MIH 기반의 효율적인 모바일 멀티캐스트 핸드오버 기법)

  • Kim, Won-Tae;Kang, Eun-Hyun;Park, Yong-Jin
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.46 no.6
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    • pp.37-47
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    • 2009
  • In this paper fast mobile multicast handover mechanism based on IEEE 802.21 MIH (Media Independent Handover) is proposed. We solve long multicast handover delay time caused by L3 movement detection mechanism of the existing mobile multicast methods. The proposed architecture adopts multicast manager concept to MIH framework in order to efficiently perform mobile multicast handover, and adds the new MIH messages dedicated for mobile multicast. Since multicast channel zapping operations of mobile users effectively make a mobile terminal handover, the architecture should consider the situations. Multicast network selection algorithm is designed by means of terminal speed and fair selection algorithm named AHP/GRA. Finally the performance of the proposed architecture against the legacy mobile multicast mechanisms is evaluated in terms of signaling cost and multicast handover delay time.

A Mobile Multicast Routing Mechanism based on the Comparison of Tree Reconstruction Cost and Tunneling Cost (트리 재구성 비용과 터널링 비용의 비교에 근거한 모바일 멀티캐스트 라우팅 기법)

  • Kim Jae-Soo;Baek Deuk-Hwa
    • Journal of Internet Computing and Services
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    • v.5 no.5
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    • pp.17-26
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    • 2004
  • Mobile multicast schemes are classified into remote subscription and bi-directional tunneling. While the former scheme has much overhead in the maintenances of multicast tree, the latter suffers from inefficient routing. In this paper, we propose dynamic mobile multicast routing (DMMR) scheme, which is operated on the basis of cost functions related with forwarding cost and tree reconstruction cost, Basically DMMR intends to find lower cost between forwarding cost and tree reconstruction cost. Forwarding cost is the cost of tunneling multicast packets from home agent, and tree reconstruction cost is the joining cost of foreign agent to multicast group. In the case that a mobile host moves to the other area, its foreign agent calculates cost functions related with forwarding cost and tree reconstruction cost. If forwarding cost is higher than tree reconstruction cost, foreign agent joins to multicast group and reconstructs the multicast tree. Accordingly, foreign agent can dynamically adapt remote subscription or bi-directional tunneling, Our scheme provides more stable multicast service to the mobile hosts regardless of the movements of mobile host and the number of mobile group members.

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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.

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.

A Mobile Multicasting Mechanism Based on Mobility Information of Mobile Hosts (호스트의 이동 정보에 근거한 모바일 멀티캐스팅 기법)

  • Baek DeukHwa;Kim Jaesoo
    • Journal of Korea Multimedia Society
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    • v.8 no.2
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    • pp.258-268
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    • 2005
  • The efficient provision of multicast service to moving hosts in mobile computing environments is not so easy task. Bi-directional tunneling scheme causes overhead about encapsulation and triangular routing. On the other hand, remote subscription scheme need freDuent tree reconstruction, which is inefficient for rapid moving hosts. In this paper we propose Mobility Based Mobile Multicast(MBMOM) scheme which is based on host's mobility information. Ultimately MBMOM try to find the strong points of remote subscription scheme and hi-directional tunneling scheme. If host's mobility speed is considered to be high, multicast packets are forwarded using hi-directional tunneling scheme from home agent continuously. If host's mobility speed is considered to be slow, remote subscription scheme is applied for foreign agent and it try to join multicast tree. We developed analytical models to analyze the performance of proposed scheme and simulated our scheme compared with MOM(Mobile Multicast), RBMOM(Range Based MOM), and TBMOM(Timer Based MOM) schemes. Simulation results show that our scheme has shorter transmission delay than above 3 schemes in the aspect of host's mobility speed and multicast group size.

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