• Title/Summary/Keyword: MANET

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Transmission Performance of Application Traffic on Underwater MANETs (수중 MANET에서 응용 트래픽의 전송 성능)

  • Kim, Young-Dong
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.557-560
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    • 2013
  • MANTET(Mobile Ad-Hoc Networks), which is configured and operated by each terminals with no support of communication infra-structures, is recently expanded its application fields from terrestrial communications to underwater environments with technical advances of Wi/Fi and minimized portable terminals. Underwater sensor network, undersea environment explorations and probes, information transmission for underwater area, etc., is typical application fields of underwater MANET. Especially, Performance measurement and analysis on this application fields is one of important research area and base of design, implementation and operation for underwater MANET. However, the research results are focued on various transmission parameters on network level, and its objects of analysis are also performance of network level. In this paper, transmission performances for application levels are measured and analyzed for user levels on underwater MANET. In this study, voice traffic is assumed as object application traffic, computer simulation which is based on NS-2 having additional implemented functions for underwater communications is used. on some defined scale of MANET, transmission performances according to varying traffic environments are measured and analyzed, operation conditions on underwater MANET is suggested with the analysis.

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Security Design for Efficient Detection of Misbehavior Node in MANET (MANET에서 비정상 노드를 효율적으로 탐지하기 위한 보안 설계)

  • Hwang, Yoon-Cheol
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.35 no.3B
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    • pp.408-420
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    • 2010
  • On a Mobile Ad hoc NETwork(MANET), it is difficult to detect and prevent misbehaviors nodes existing between end nodes, as communication between remote nodes is made through multiple hop routes due to lack of a fixed networked structure. Therefore, to maintain MANET's performance and security, a technique to identify misbehaving middle nodes and nodes that are compromise by such nodes is required. However, previously proposed techniques assumed that nodes comprising MANET are in a friendly and cooperative relationship, and suggested only methods to identify misbehaving nodes. When these methods are applied to a larger-scale MANET, large overhead is induced. As such, this paper suggests a system model called Secure Cluster-based MANET(SecCBM) to provide secure communication between components aperANET and to ensure eed. As such, this pand managems suapemisbehavior nodes. SecCBM consists apetwo stages. The first is the preventis pstage, whereemisbehavior nodes are identified when rANET is comprised by using a cluster-based hierarchical control structure through dynamic authentication. The second is the post-preventis pstage, whereemisbehavior nodes created during the course apecommunication amongst nodes comprising the network are dh, thed by using FC and MN tables. Through this, MANET's communication safety and efficiency were improved and the proposed method was confirmed to be suitable for MANET through simulation performance evaluation.

An Address Autoconfiguration Mechanism for Connected MANET with Multiple Gateways having a Same Network Prefix (동일한 네트워크 프리픽스를 갖는 다중 게이트웨이 기반의 connected MANET에서 주소 자동 설정 방법)

  • Lee, Jae-Hwoon;Lee, Beom-Jae;Jung, Woo-Young
    • Journal of KIISE:Information Networking
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    • v.36 no.5
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    • pp.405-412
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    • 2009
  • Mobile ad hoc networks (MANETs) allow mobile nodes to communicate among themselves via wireless multiple hops without the help of the wired infrastructure. In the MANET, it is required not only a route setup mechanism that makes nodes not within each other's transmission range communicate but also mechanism in order for a node to auto-configure a unique address. In this paper, we propose an address auto-configuration mechanism when MANET is connected to the Internet via several Internet Gateways and all gateways advertise the same network prefix. By using the proposed mechanism, once a node configures an Internet topologically correct and globally unique IP address, then the node can utilize the configured address even though the node moves within the MANET. Through the simulations, we analyze the performance of our proposed mechanism and, from the simulation results, we show that out proposed mechanism outperforms the existing mechanism.

Address Configuration and Route Determination in the MANET Connected to the External Network (외부 망에 연결된 MANET에서의 주소 설정 및 경로 결정)

  • Lee, Jae-Hwoon;Ahn, Sang-Hyun;Yu, Hyun
    • The KIPS Transactions:PartC
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    • v.15C no.6
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    • pp.539-546
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    • 2008
  • In this paper, we propose an address autoconfiguration mechanism and a route establishment mechanism appropriate for the modified MANET architecture which overcomes the multi-link subnet problem. For the delivery of Router Advertisement (RA) messages without causing the duplicate packet reception problem in the multi-hop wireless network environment, the Scope-Extended RA (Scope-Extended Router Advertisement) message is defined. Also, by defining the MANET Prefix option, a MANET node is allowed to send packets destined to a host not in the MANET directly to the gateway. This can prevent the performance degradation caused by broadcasting control messages of the reactive routing protocol for route establishment. The performance of the proposed mechanism is analyzed through NS-2 based simulations and, according to the simulation results, it is shown that the proposed mechanism performs well in terms of the control message overhead.

Transmission Performance of Large Scale MANETs with IDS (IDS가 있는 대규모 MANET의 전송성능)

  • Kim, Young-Dong
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.642-645
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    • 2012
  • MANET has disadvantage for information intrusion caused from non-infra structure. That is based on mixed problems caused from terminal devices has no capability of various resources using abilities to run intrusion prevention function, and also from difficulty of no easy using infra structural server like as firewall. In this paper, transmission performances, be effected from information intrusion and IDS(Intrusion Detection System), are analyzed for large scale MANET, and weakness from information intrusion of MANET are studied. This study is for large scale MANET which has some large communication area and lots of nodes, voice traffic, based on VoIP protocols, is considered as application services be transmitted over MANETs. Computer simulation using NS-2 is used to measure and show MOS and call connection ratios.

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Transmission Performance of MANET under Multiple Blackhole Attacks (다중 블랙홀 공격이 있는 MANET의 전송성능)

  • Kim, Young-Dong
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.783-786
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    • 2015
  • Hole attack, which is disturbed transmission function through change of routing information, can cause critical results for MANET as non-infrastructure network. Backhole attack, as a typical hole attack, is one malicious attack which is disabled network transmission function by assumption of transmission data through modification of routing information. It is very important to evaluate transmission performance caused by blackhole attack, because transmission performance of MANET is affective with blackhole attack. In this paper, transmission performance is analyzed with MANET under multiple blackhole attacks caused multiple blackhole nodes. Computer simulation based on NS-2 is used as analysis tool and voice traffic is considered ad application service on MANET.

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Transmission Performance of VoIP Traffics on Underwater MANET (수중 MANET에서 VoIP 트래픽의 전송 성능)

  • Kim, Young-Dong
    • The Journal of the Korea institute of electronic communication sciences
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    • v.11 no.12
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    • pp.1187-1192
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    • 2016
  • Performance analysis results are limited to of network level, because network level transmission parameters are used for performance measure and analysis of network design, construction and operation on underwater MANET, With this way of performance analysis based on network level, it is not easy to analyze transmission performance related with user level transmission quality. In this paper, transmission performance focused on application traffic be required by user is investigated to supplement weakness of performance analysis based on network level. Voice traffic, which is expected to be increasingly used on underwater MANET, is considered as application service, Some conditions for underwater MANET will be proposed to support transmission quality, MOS, CCR and EED, etc.. A computer simulation based on NS-2 is used for performance measure, voice traffic is generated as VoIP specification.

Performance Analysis of Routing Protocols depending on the Types of Topology in MANET (토폴로지 유형에 따른 MANET 라우팅 프로토콜의 성능 분석)

  • Kim Myung-Gwan;Hwang Sung-Ho
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.9 no.5
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    • pp.934-942
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    • 2005
  • MANET(Mobile Ad hoc NETwork) routing protocols have merits and demerits under the specific situations. Because it is not clear which protocol is the best under all situations, a suitable routing protocol should be selected depending on the traffic and moving characteristics of nodes. The aim of this paper is to select an appropriate routing protocol to be used by the Korea Coal Corporation. So we designed working scenarios such as coal mining and tunnel supporting that reflected mobile characteristics of nodes. We constructed coal mining and tunnel supporting topology, and analyzed the performance of MANET routing protocols. This result can be used as a basis to select a MANET routing protocol in underground tunnel environment and other mine of the Korea Coal Corporation.

A N-LAR Algorithm for Efficient Routing in MANET with High Mobility (이동성이 큰 MANET에서의 효율적인 라우팅을 위한 N-LAR 알고리즘)

  • Kim, Min-Ho;Park, Sung-Han
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.44 no.10
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    • pp.76-82
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    • 2007
  • Recently, researches related MANET are progressing dynamically in points of view which MANET need no additional infra and guarantee node mobility. Node mobility in MANET is becoming more important, as people interest in using Ad hoc network under a concept of node mobility as fast automobile not walking. when nodes move fast, there are many problems headed by high cost for searching destination and routing. To deal with this problems We propose new routing protocol, No path-Location Aided Routing (N-LAR). Our algorithm has a better performance in terms of end-to-end delay, packet delivery ratio in MANET with High mobility.

Improvement of VoIP Service over Mobile Ad-Hoc Network (MANET 기반 VoIP 서비스 성능 개선)

  • Ming, Li;Kim, Young-Dong
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.795-797
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    • 2009
  • Voice over Internet Protocol(VoIP) service becomes more and more popular nowadays. As such, it is developed over many kinds of network models, especially wireless networks. Mean Opinion Score(MOS) computes the QoS of VoIP service which should be supported by robust network environment. However, MANET is not stable enough to supply high MOS values for VoIP service. In this paper, VoIP service over MANET is simulated using ns-2(Network Simulation 2). In oder to get different MOS values in the results, we differentiate between network environments by adjusting the parameters of MANET.Through comparing the results we can know how to improve the QoS.

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