• Title/Summary/Keyword: on-demand routing

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Secure Routing Scheme in CCN-Based Mobile Ad-Hoc Networking Environments (CCN 기반 이동 애드혹 환경에서의 안전한 라우팅 방안)

  • Lee, Ju-Yong;Lee, Ji-Hoon
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.39B no.5
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    • pp.304-308
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    • 2014
  • As users generate lots of contents anytime and anywhere with an explosive growth of the number of mobile devices, Content centric networking (CCN) has emerged as a new networking architecture. However, the efficient CCN routing scheme is required for ad hoc network support because of its one to one message exchange characteristics. So, this paper proposes the new CCN ad hoc routing scheme using on-demand approach, which includes the secure routing configuration scheme based on multiple hash operation. It is shown from the simulation that the proposed method can provide lower control overhead because of its two-fold routing configuration architecture.

Power Dissipation Considered AODV for Fair Energy Distribution in MANET (MANET에서 에너지 균등분배를 위해 전원상태를 고려한 AODV)

  • Song, Sang-Bok;Lee, Soong-Hee
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.12 no.3
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    • pp.469-477
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    • 2008
  • The standard routing protocol of MANET(Mobile Ad-hoc NETwork), AODV(Ad-hoc On-demand Distance Vector), only considers the shortest path for routing, which may cause traffic concentration to a node at the critical path. Hence, the battery of the node will be dissipated rapidly to reduce the lifetime of the whole network. In this paper, power dissipation considered AODV is proposed for fair energy distribution in MANET, and verified using the computer simulation.

An Efficient Routing Scheme based on Link Quality and Load Balancing for Wireless Sensor Networks (무선 센서 네트워크에서 링크 상태 및 트래픽 분산 정보를 이용한 효과적인 라우팅 방법)

  • Kim, Sun-Myeng;Yang, Yeon-Mo
    • Journal of the Korea Society for Simulation
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    • v.19 no.4
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    • pp.11-19
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    • 2010
  • ZigBee is a standard for wireless personal area networks(WPANs) based on the IEEE 802.15.4 standard. It has been developed for low cost and low power consumption. There are two alternative routing schemes that have been proposed for the ZigBee standard: Ad-hoc On-Demand Distance Vector(AODV) and tree routing. The tree routing forwards packets from sensors to a sink node based on the parent-child relationships established by the IEEE 802.15.4 MAC topology formation procedure. In order to join the network, a sensor node chooses an existing node with the strongest RSSI(Received signal strength indicator) signal as a parent node. Therefore, some nodes carry a large amount of traffic load and exhaust their energy rapidly. To overcome this problem, we introduce a new metric based on link quality and traffic load for load balancing. Instead of the strength of RSSI, the proposed scheme uses the new metric to choose a parent node during the topology formation procedure. Extensive simulation results using TOSSIM(TinyOS mote SIMulator) show that the CFR scheme outperforms well in comparison to the conventional tree routing scheme.

Scalability Analysis of MANET IPv6 Address Auto-configuration Protocols based on Link Error Modeling (링크 에러 모델링을 이용한 MANET 환경에서의 IPv6 자동주소 설정 방식의 확장성 분석)

  • Kim, Sang-Chul
    • Journal of KIISE:Information Networking
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    • v.35 no.4
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    • pp.282-291
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    • 2008
  • This paper focuses on message complexity performance analysis of MANET AAPs in reference to link errors generated by the mobile wireless nodes. To obtain the message complexity performance of AAPs in reference to the link error probability ($P_e$), an enhancement was made by proposing the retransmission limit (S) to be computed for error recovery (based on the link error probability), and then for each of the AAPs the control procedures for the retransmission limit have been properly included. The O-notation has been applied in analyzing the upper bound of the number of messages generated by a MANET group of N nodes. Based on a link error probability range of $P_e=0$ to 0.8, the AAPs investigated in this paper are Strong DAD, Weak DAD with proactive routing protocol (WDP), Weak DAD with on-demand routing protocol (WDO), and MANETconf. Based on the simulation results and analysis of the message complexity, for nominal situations, the message complexity of WDP was lowest, closely followed by WDO. The message complexity of MANETconf is higher than that of WDO, and Strong DAD results to be most complex among the four AAPs.

Computing Methods of Node Traversal Time of ERS Algorithm to Reduce the Retransmission Rate in AODV Routing Protocol (AODV 라우팅 프로토콜에서 재전송률을 낮추기 위한 ERS 알고리즘의 노드순회시간 계산방법)

  • Sun Chang-Yoon;Kang Seung-Ho;Lim Hyeong-Seok
    • The KIPS Transactions:PartC
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    • v.13C no.4 s.107
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    • pp.447-454
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    • 2006
  • An ad-hoc network routing protocol, AODV(Ad-hoc On-demand Distance Vector) initially uses ERS(Expanding Ring Search) algorithm to control the RREQ(Route Request) retransmission in the route discovery process. Because ERS uses the fixed NTT(Node Travesal Time), it does not reflect accurately ad-hoc network environment. In this paper, we propose an improved ERS algorithm which lowers the retransmission rate. It uses RREP(Route Reply) and gives different weights in NTT of each node in accordance with the adjacency to an originating node. To show the effectiveness of the proposed algorithm, we perform a simulation using ns2. The simulation results showed that the proposed algorithm has better performance than existing algorithms.

Performance Evaluation for Multicasting Video over OpenFlow-based Small-scale Network

  • Thi, Thuyen Minh;Huynh, Thong;Kong, In-Yeup;Hwang, Won-Joo
    • Journal of Korea Multimedia Society
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    • v.17 no.9
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    • pp.1084-1091
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    • 2014
  • When demand for transmitting multimedia data increases, network congestion is more likely to occur and users will suffer high loss rate as well as high delay. In order to enhance quality-of-service (QoS) of video multicasting, we need to raise transmission reliability and reduce end-to-end delay. This paper proposes a routing mechanism for a OpenFlow-based small-scale network in order to multicast video reliably with low delay. In our method, multipath routing will be applied to Multiple Description (MD) Coded video to exploit its multi-description property. Through performance evaluation, our method shows improvement on loss rate, delay and video distortion.

Evaluation of MANET Protocol Scheme for TICN System (TICN체계하 MANET 프로토콜 분석)

  • Son, Hye-Joung;Kwon, Tae-Wook
    • Journal of the Korea Institute of Military Science and Technology
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    • v.12 no.4
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    • pp.469-475
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    • 2009
  • TMMR(Tactical Multiband Multirole Radio) is one of the important equipments for TICN which is our next military tactical communication system and it supplies to the distribution of traffic of C2(Command & Control) and SA(Situation Awareness) for unit of Brigade and below. In this paper, we define the tactical needs of military communication, and evaluate MANET(Mobile Ad-hoc Network) protocol for the future digital battle-field through performance comparison with a network simulator.

A study on the routing and wavelength assignment in WDM ring (WDM 링에서의 루팅 및 파장할당에 관한 연구)

  • 김후곤;백천현;정용주
    • Journal of the Korean Operations Research and Management Science Society
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    • v.27 no.4
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    • pp.1-10
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    • 2002
  • The ring routing and wavelength assignment problem arose in the planning of optical communication networks which use WDM rings. Traffic demands are given for each pair of nodes in an ring : each demand must be routed one of the two possible connections round the ring and the wavelength assignments must be made so that there are no conflicts : that is. no two connections whose routes share a link can be assigned the same wavelength along that link. The objective is to minimize the number of used wavelengths. We propose the local optimal routing for the problem and show that there always exists an optimal solution satisfying it. Furthermore we suggest a new lower bound for the problem and show that it is very efficient for the worst case example.

Hybrid Distributed Stochastic Addressing Scheme for ZigBee/IEEE 802.15.4 Wireless Sensor Networks

  • Kim, Hyung-Seok;Yoon, Ji-Won
    • ETRI Journal
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    • v.33 no.5
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    • pp.704-711
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    • 2011
  • This paper proposes hybrid distributed stochastic addressing (HDSA), which combines the advantages of distributed addressing and stochastic addressing, to solve the problems encountered when constructing a network in a ZigBee-based wireless sensor network. HDSA can assign all the addresses for ZigBee beyond the limit of addresses assigned by the existing distributed address assignment mechanism. Thus, it can make the network scalable and can also utilize the advantages of tree routing. The simulation results reveal that HDSA has better addressing performance than distributed addressing and better routing performance than other on-demand routing methods.

Improvement of OLSR Through MIMC's Decreased Overhead in MANET (모바일 애드 혹 네트워크 환경 하에서 멀티인터페이스 멀티채널의 오버헤드 감소를 통한 OLSR의 성능 개선)

  • Jang, Jae-young;Kim, Jung-ho
    • KIPS Transactions on Computer and Communication Systems
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    • v.5 no.3
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    • pp.55-70
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    • 2016
  • The most critical research issue in MANET environment is on supporting reliable communication between various devices. Various Multi-Hop Routing Protocol studies have proceeded. However, some problems you might have found when you use the existing link state routing technique are that it increases Control Message Overhead and it is unstable when node moves in CR circumstance which has transformation of using channel and MIMC circumstance which uses a number of interfaces. This essay offers a technique which is based on On-Demand Hello and the other technique which used Broadcast Interface of optimization as a solution to decrease Control Message Overhead. Also it proposes Quick Route Restoration technique which is utilized by GPS and MPR Selection technique which consider mobility as a solution of stable communication when node moves. Those offered Routing Protocol and OPNET based simulator result will be expected to be an excellent comparison in related research fields.