• Title/Summary/Keyword: Multicast Protocol

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Tighter Throughput Lower Bounds of Connectivity-Based Reliable Multicast MAC Protocol for IEEE 802.11 Wireless LANs (IEEE 802.11 무선랜에서 연결정보 기반의 신뢰성 있는 멀티캐스트 MAC 프로토콜을 위한 쓰루풋의 하한 유도)

  • Choi, Woo-Yong
    • Journal of Korean Institute of Industrial Engineers
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    • v.38 no.4
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    • pp.285-288
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    • 2012
  • The connectivity-based reliable multicast MAC protocol was proposed for IEEE 802.11 wireless LANs and the formulae for the lower bounds of the multicast downlink throughput and the uplink throughput of the connectivity-based reliable multicast MAC protocol were derived in our previous study. We provide the tighter throughput lower bounds of the connectivity-based reliable multicast MAC protocol than the lower bounds presented in our previous study.

Explicit Multicast Extension (Xcast+) for Efficient Multicast Packet Delivery

  • Shin, Myung-Ki;Kim, Yong-Jin;Park, Ki-Shik;Kim Sang-Ha
    • ETRI Journal
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    • v.23 no.4
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    • pp.202-204
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    • 2001
  • In this letter, we propose a new multicast scheme, named Xcast+, which is an extension of Explicit Multicast (Xcast) for an efficient delivery of multicast packets. The mechanism incorporates the host group model and a new control plane into existing Xcast, and not only does it provide the transparency of traditional multicast schemes to senders and receivers, but it also enhances the routing efficiency in networks. Since intermediate routers do not have to maintain any multicast states, it results in a more efficient and scalable mechanism to deliver multicast packets. Our simulation results show distinct performance improvements of our approach compared to Xcast, particularly as the number of receivers in a subnet increases.

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IPv6 Multicast Packet Transmission over IEEE 802.16 Networks (IEEE 802.16 망에서의 IPv6 멀티캐스트 패킷 전송 방법)

  • Jeong, Sang-Jin;Shin, Myung-Ki;Kim, Hyoung-Jun
    • Proceedings of the IEEK Conference
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    • 2006.06a
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    • pp.235-236
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    • 2006
  • IEEE 802.16 networks support mobile stations (MSs) to access broadband wireless networks while moving at a vehicular speed. However, IEEE 802.16 networks do not provide link layer native multicast capability because of point-to-multipoint connection characteristic. Due to this feature, it is not easy to adopt protocols or applications which need native link layer multicast capability. In order to solve the multicast support problem, we use the built-in LAN emulation feature of IEEE 802.16 which is based on Convergence Sublayer (CS). Our proposed operational procedures support not only the delivery of link local scope multicast packets, but also the delivery of non-link local scope multicast packets such as site local or global scope multicast packets. We also present the method of forming multicast Connection Identifier (CID) which is used to transport IP packets over IEEE 802.16 networks.

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Handoff Protocol for Improving Multicast Session Delay In Mobile Networks (이동네트워크에서 멀티캐스트 세션지연을 개선하기 위한 핸드오프 프로토콜)

  • Kwon, Sang-Do;Kim, Kyung-Jun;Kim, Cheol-Won
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.14 no.6
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    • pp.1382-1390
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    • 2010
  • A multicast session protocol in wireless networks reduces the session delay of multicast delivery caused by moving of mobile host. A hand-off scheme, called MSDR (multicast session delay reduction), in mobile networks is proposed. MSDR protocol that minimizes the delay of a session re-establishment uses the basic unicast routing function of the IETF mobile IP and the DFA (designated foreign agent) to provide multicast services for mobile hosts. Proposed MSDR protocol allows the mobile hosts to continuously receive packets when they move across the basic sets during hand-off. Discrete-event simulation carried out for performance evaluation of MSDR protocol, and simulation results indicated that our scheme can offer a better performance of multicast session delay reduction in terms of signalling cost than that of IETF.

An Optimal Multicast Routing Protocol for Guaranting Host Mobility in IPv6-Based Mobile Networks (IPv6 기반 이동망에서 호스트 이동성 보장을 위한 최적화된 멀티캐스트 라우팅 프로토콜)

  • 양승제;강명규;박성한
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.41 no.5
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    • pp.1-9
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    • 2004
  • In this paper, we propose a multicast routing protocol for the seamless delivery of multicast data to mobile hosts through the optimal route in IPv6-Based mobile networks. The proposed multicast routing protocol reduces the tree reconstruction overhead by limiting the tunneling length according to the mobility of mobile hosts. In this way, our protocol satisfies the bound of the end-to-end delay and supports the seamless handoff. Analytical and simulation results show that the proposed protocol has better performance in terms of the tree reconstruction, tunneling service and multicast packet loss than the previous protocols does.

Design and Evaluation of a New Multicast Protocol in Large Micro-Mobility Environments (대규모 마이크로 모빌리티 환경에서의 멀티캐스트 프로토콜의 구현과 평가)

  • Kang, Ho-Seok;Shim, Young-Chul
    • The KIPS Transactions:PartC
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    • v.15C no.1
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    • pp.51-60
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    • 2008
  • Micro-mobility protocols have been developed to reduce the control message overhead due to movements of mobile nodes. With the spread of mobile devices, services using mobile nodes are increasing and multicast services are becoming more important in providing multimedia services. In this paper we propose a new multicast protocol suitable for micro-mobility environments. The proposed protocol is designed to maintain optimal multicast routing paths and continue to provide multicast services without disruption in spite of frequent handoffs due to movements of mobile nodes. We used simulation to evaluate the proposed protocol, compared its performance with existing multicast protocols for mobile environments including bi-directional tunneling, remote subscription, and MMA, and observed that the proposed protocol exhibited better performance in terms of transmission success ratio and overhead on the network.

The Reliable Multicast Transport Protocol over Wireless Convergence Networks using a Retransmission Agent (재전송 Agent를 이용한 유무선 융합망에서의 신뢰성 있는 멀티캐스트 전송 방식)

  • Youm, Sungkwan;Yu, Sunjin
    • Journal of the Korea Convergence Society
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    • v.7 no.4
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    • pp.25-32
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    • 2016
  • When using reliable multicast protocol over air links, the multicast packets lost in the air link cause the initiation of retransmission request packets and the implosion of retransmission packets, which deteriorate multicast session performance. This paper proposes on the efficient reliable multicast mechanism in wireless networks utilizing the Agents. In this paper we show the design of a retransmission agent which improves the performance of reliable multicast sessions in wireless network. The main idea is to cache reliable multicast packets at the base station and perform local retransmissions across the wireless link. MATLAB has been used to simulate and to get performance results for signaling overhead and processing delay through the comparison of the proposed agent model to the Multicast File Transfer Protocol. It has been proven from the simulation results that the proxy module make pass trials shorter in Multicast File Transfer Protocol.

A Study on Logical Cooperative Entity-Based Multicast Architecture Supporting Heterogeneous Group Mobility in Mobile Ad Hoc Networks (Mobile Ad Hoc 네트워크에서 이질적 그룹 이동성을 지원하는 논리적 협업 개체 기반의 멀티캐스트 구조 연구)

  • Kim, Kap-Dong;Kim, Sang-Ha
    • The KIPS Transactions:PartC
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    • v.14C no.2
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    • pp.171-178
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    • 2007
  • In mobile ad hoc networks, an application scenario requires mostly group mobility behavior in the mix of group moving nodes and individually moving nodes. The nodes of those applications tend to belong to the movement group with similar movement behavior. Group mobility is one of the good methods to improve scalability, and reduces the protocol overhead. In this paper, we propose the multicast architecture which regards nodes that have equal group mobility in the heterogeneous group mobility network as the single entity with the multiple interfaces and composes multicast tree, The logical cooperative entity-based multicast architecture accommodates the scalability, the multicast tree simplification, and the protocol overhead reduction which arc obtained from the hierarchical multicast architecture, while it maintains the nat multicast architecture for the data transmission. It also prevents the concentration of the energy consumption dispersing data forwarding load into the several ingress/egress nodes. Results obtained through simulations show that logical cooperative entity based multicast protocol with multiple interfaces offers the protocol scalability and the efficient data transmission.

An Enhanced Mobile Multicast Protocol

  • Nam, Sea-Hyeon
    • Proceedings of the Korea Society of Information Technology Applications Conference
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    • 2005.11a
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    • pp.61-64
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    • 2005
  • The packet loss problem that occurs in the mobile multicast (MoM) protocol due to designated multicast service provider (DMSP) handoff is investigated through simulation experiments for several DMSP selection policies. Then, two enhanced DMSP schemes are proposed to minimize the packet loss of the MoM protocol with single DMSP. The first scheme uses a backup DMSP and greatly reduces the packet loss rate at the expense of the increased network traffic. The second scheme utilizes the extended DMSP operation and shows many desirable features such as the almost-zero packet loss rate and relatively low network traffic.

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A Scalable Multicasting with Group Mobility Support in Mobile Ad Hoc Networks

  • Kim, Kap-Dong;Lee, Kwang-Il;Park, Jun-Hee;Kim, Sang-Ha
    • Journal of Information Processing Systems
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    • v.3 no.1
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    • pp.1-7
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    • 2007
  • In mobile ad hoc networks, an application scenario requires mostly collaborative mobility behavior. The key problem of those applications is scalability with regard to the number of multicast members as well as the number of the multicast group. To enhance scalability with group mobility, we have proposed a multicast protocol based on a new framework for hierarchical multicasting that is suitable for the group mobility model in MANET. The key design goal of this protocol is to solve the problem of reflecting the node's mobility in the overlay multicast tree, the efficient data delivery within the sub-group with group mobility support, and the scalability problem for the large multicast group size. The results obtained through simulations show that our approach supports scalability and efficient data transmission utilizing the characteristic of group mobility.