• Title/Summary/Keyword: 네트워크 계층 이동성 지원 방안

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A Micro Mobility Management Scheme in Wireless LAN Environments (무선 LAN환경에서 마이크로 이동성 지원 방안)

  • 고광신;차우석;김형준;조기환
    • Journal of KIISE:Information Networking
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    • v.31 no.2
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    • pp.158-170
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    • 2004
  • Mobile IP is a base protocol to support host mobility in IP-based wireless network. It is well known that the protocol contains two main delay factors on a handoff process; one is to detect a host movement, and the other is to register the host's current location to its home network. This paper examines Layer 2(L2) handoff procedure in the IEEE 802.11 Wireless LAN, and identifies these L2 triggers that can be usefully applied to Layer 3(L3) handoff. Then, the MCAA(Multiple-Casting using Anchor Agent) mechanism is proposed. It makes use of the L2 trigger and the network topology to construct an anchor agent dynamically, and the multiple-casting scheme to prevent an ongoing packet to be lost. Using a network simulator, the proposed mechanism has been evaluated the handoff delay and the packet lost point of view, in comparison with the regional registration protocol which is the most well known micro mobility support mechanism.

Improvement of MAP Load Balancing in Hierarchical Mobile IPv6 (계층적 Mobile IPv6에서의 MAP 부하 분산 개선에 관한 분석)

  • Song, Bok-Sob;Kim, Jeong-Ho
    • The Journal of the Korea Contents Association
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    • v.9 no.2
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    • pp.67-75
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    • 2009
  • The growing need for the mobility supportable networks induces the IP-based mobility management protocols. Though HMIPv6 which manages the micro-mobility of mobile nodes using MAPs suggests an effective method for mobility-support for mobile nodes within the domain that is managed by MAP. There is a problem that traffic may be concentrated on MAPs. In this paper, therefore, we proposed a method that can effectively distribute the traffic which is concentrated on a MAP under phased Mobile IPv6. In our proposed method, two or more MAPs are required and classified as an 'Active MAP' or a 'Passive MAP'. In addition, we defined the state of transition events between Active MAP and Passive MAP and the operations among MAPs for load distribution when an overload condition is occurred at some MAPs by traffic congestion. We compared the performance of our proposed method with its phased Mobile IPv6 to prove the propriety of our proposed method. As a result, we showed that our proposed method can provide an enhanced performance by about 12 percentages in view of packet throughput at the node.

Handover Performance Improvement Method of Mobile IP in IPv6 (IPv6에서 Mobile IP의 핸드오버 성능 향상 방안)

  • 남기모;박재균;서동운;강성용;김정훈;박석천
    • Proceedings of the Korea Multimedia Society Conference
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    • 2000.11a
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    • pp.315-318
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    • 2000
  • 최근 휴대용 컴퓨터가 점점 소형화, 고성능화 되고 무선 액세스 기술이 향상됨에 따라 이동성에 대한 사용자의 요구가 증가하고 있다. 인터넷 상에서 이동성 제공을 위하여 네트워크 계층에서 호스트의 이동성을 제공하기 위한 연구로 IETF (Internet Engineering Task Force)에서 Mobile IP라는 프로토콜을 제안하였다. 본 논문에서는 기존 Mobile IP의 문제점을 분석하여 구성 요소의 기능을 재설계 함으로써 이동 노드가 접속점을 변경하는 핸드오버가 발생한 경우, 성능 향상을 위한 바인딩 캐쉬 서버의 도입과 지역 등록(Local Registration) 방안을 제안하였다. 바인딩 캐쉬 서버를 통해 이동 노드에 바인딩 경보를 관리하여 Macro Mobility를 지원하도록 하고, 인접 접속점으로의 핸드오버 시는 지역 등록으로 Micro Mobility를 가능하게 하였다 또한 바인딩 캐쉬 서버와 지역 등록 서버에 버퍼링 기능을 가지도록 하여 핸드오버 시 이를 포워딩함으로써 데이터 패킷의 손실을 방지하였다 제안한 방안은 전송 지연과 패킷 손실 측면에서 기존의 방안보다 우수한 성능을 나타내고, 효율적인 경로 설정이 가능하다.

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A Method to Support Mobile Sink Node in a Hierarchical Routing Protocol of Wireless Sensor Networks (무선 센서 네트워크를 위한 계층적 라우팅 프로토콜에서의 이동 싱크 노드 지원 방안)

  • Kim, Dae-Young;Cho, Jin-Sung
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.33 no.1B
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    • pp.48-57
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    • 2008
  • Wireless sensor networks are composed of a lot of sensor nodes and they are used to monitor environments. Since many studies on wireless sensor networks have considered a stationary sink node, they cannot provide fully ubiquitous applications based on a mobile sink node. In those applications, routing paths for a mobile sink node should be updated while a sink node moves in order to deliver sensor data without data loss. In this paper, we propose a method to continuously update routing paths for a mobile sink node which can be extended on hierarchical multi-hop routing protocols in wireless sensor networks. The efficiency of the proposed scheme has been validated through comparing existing method using a location based routing protocol by extensive computer simulation.

Improved Hierarchical Prefix Delegation Protocol for route optimization in nested NEMO (중첩된 NEMO에서의 경로 최적화를 위한 개선된 계층적 프리픽스 할당 프로토콜)

  • Rho Toung-Taeg
    • Journal of the Korea Society of Computer and Information
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    • v.10 no.5 s.37
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    • pp.227-236
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    • 2005
  • Hierarchical Prefix Delegation (HPD) protocol refers to a type of solution to problems inherent in non-optimal routing which occurs with Network Mobility (NEMO) basic solution. However, because HPD cannot improve the micro-mobility Problems, Problem surfaces each time Mobile Network Node (MNN) changes the attachment point; as happens also in a Mobile IPv6 (MIPv6) protocol in sen야ng Binding Update (BU) messages to Home Agent (HA) / Correspondent Nodes(CNs) By applying Hierarchical Mobile IPv6 protocol concept to HPD, this study Proposes an algorithm for effectively handling micro-mobility problems which occur with HPD in a nested NEMO environment. By sending BU only to nearby Mobility Anchor Point(MAP) during MNN location change within a MAP's domain, the proposed protocol will alleviate service disruption delays and signaling loads during the handover process, overcoming the limitations of HPD.

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Improved Hierarchical Prefix Delegation Protocol for route optimization in nested NEMO (중첩된 NEMO에서의 경로 최적화를 위한 개선된 계층적 프리픽스 할당 프로토콜)

  • Rho, Kyung-Taeg
    • Journal of the Korea Society of Computer and Information
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    • v.11 no.1 s.39
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    • pp.147-155
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    • 2006
  • Hierarchical Prefix Delegation (HPD) protocol refers to a type of solution to problems inherent in non-optimal routing which occurs with Network Mobility (NEMO) basic solution. However, because HPD cannot improve the micro-mobility problems, problem surfaces each time Mobile Network Node (MNN) changes the attachment point; as happens also in a Mobile IPv6 (MIPv6) protocol in sending Binding Update (BU) messages to Home Agent (HA) / Correspondent Nodes(CNs). By applying Hierarchical Mobile IPv6 protocol concept to HPD, this study proposes an algorithm for effectively handling micro-mobility problems which occur with HPD in a nested NEMO environment. By sending BU only to nearby Mobility Anchor Point(MAP) during MNN location change within a MAP's domain, the proposed protocol will alleviate service disruption delays and signaling loads during the handover process, overcoming the limitations of HPD.

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A Proposal and Evaluation of a Novel Binding Scheme in the NEMO Support in PMIPv6 Networks (PMIPv6 망에서 NEMO 지원을 위한 Binding 방안 제안과 검증)

  • Na, Yoo-Cheol;Min, Sang-Won;Kim, Bok-Ki
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.35 no.9B
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    • pp.1266-1271
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    • 2010
  • In this paper, we describe overhead problems which result from the supporting NEMO in PMIPv6 networks, and propose a novel binding scheme for the network-based mobility management with new network-layer message which solves the problems of the additional tunnel. Our proposed binding scheme can reduce handover latency without mobility-related procedure by the hosts. A performance evaluation shows that the proposed scheme works more efficiently than the scheme which is proposed by the IETF NETLMM WG in terms of packet loss, handover latency and average packet throughput.

IP Paging Architecture Using Distance-based Location Update Scheme (거리기반 위치등록 방법을 이용한 IP망에서의 페이징 지원 방안)

  • 장인동;박기식
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.28 no.6B
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    • pp.573-587
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    • 2003
  • Due to the growth of mobile communication and the popularization of Internet, it is expected that wired and wireless communication network of the next generation will be integrated and flourished with IP-based. There have been a great deal of research efforts to provide mobile IP service onthe existing lower layer. The location update and the paging scheme is one of the most challenging technical issues for this topic. In this thesis, a paging method based on the distance-based location update scheme is proposed for IP network to support mobility in layer 3. The proposed scheme is implemented and verified with the OPNET.

A MAP Management Scheme for Fast Handover in HMIPv6 Networks (HMIPv6 네트워크에서 Fast 핸드오버를 위한 MAP 관리 방안)

  • Park Sangjoon;Kim Byunggi;Park Wongil
    • Journal of Korea Multimedia Society
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    • v.8 no.3
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    • pp.372-378
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    • 2005
  • When a mobile node changes a sub network using Mobile IP, it must register its current location to the home agent. If a mobile node is far from its home network, the Binding Update (BU) time delay is longer and affects its connection state. To solve such a BU delay problem, a new component in HMIPv6, called MAP, supports the mobility of mobile node to reduce the signaling delay in handover However, in hierarchical MAP architecture, the register concentration to a specific MAP may be occurred, which affects the network management wholly. In this paper, we propose a MAP selection scheme based on ioad balancing by the mobility factor and the traffic property. By the mobility factor and the traffic property, a mobile node can select a adequate MAP on its mobility factor and traffic characteristic.

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A Fast Handover Scheme of Multicast Traffics m PMIPv6 (PMIPv6에서 멀티캐스트 트래픽의 고속핸드오버 방안)

  • Oh, Dong-Kyu;Min, Sang-Won
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.36 no.3B
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    • pp.208-213
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    • 2011
  • Since the wireless technologies based on the IP have been developed recently, a variety of mobile services has been proposed. For broadcasting services to utilize network resources efficiently, there is a need to support handover of multicast traffic in mobile networks. In this paper, we add a network function block to solve the tunnel convergence problem, and propose a new fast handover scheme to reduce handover latency for PMIPv6 networks with multicast function. With the simulation result, we show that our fast handover scheme has better performance than the draft in the IETF in the viewpoint of handover latency and multicast service disruption.