• 제목/요약/키워드: Multimedia routing

검색결과 246건 처리시간 0.022초

무선 멀티미디어 센서 네트워크의 서비스 수명을 위한 클러스터 라우팅 (Cluster Routing for Service Lifetime of Wireless Multimedia Sensor Networks)

  • 이종득
    • 디지털융복합연구
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    • 제11권5호
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    • pp.279-284
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    • 2013
  • 본 논문에서는 무선 멀티미디어 센서 네트워크의 서비스 수명 보장을 위해 클러스터 기반의 새로운 라우팅 프로토콜을 제안한다. 제안된 프로토콜은 무선 센서 멀티미디어 컴퓨팅 환경에서 에너지 소모를 줄이고 서비스 오류를 줄이기 위해 인트라 클러스터 라우팅과 인터 클러스터 라우팅을 수행한다. 또한 제안된 클러스터 라우팅은 라우팅 신뢰성을 향상시키고, 패킷 손실을 최소화하며, 관리 오버헤드를 최소화하고, 에너지 소모를 최소화한다. 본 논문에서는 시뮬레이션 결과를 통해서 제안된 기법이 DSR (Dynamic Source Routing) 기법, AODV(Adhoc On-demand Distance Vector routing) 기법에 비해서 효율성이 우수함을 보인다.

A Wireless Location-Based Routing Algorithm in Multi-User Game Environments

  • Lee, Jong-Min;Kim, Seong-Woo;Lee, Jung-Hwa
    • 한국멀티미디어학회논문지
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    • 제10권12호
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    • pp.1733-1740
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    • 2007
  • In this paper, we propose a wireless location-based routing algorithm which uses the location information of its neighbor nodes and a destination node. At first, the proposed routing algorithm forwards a packet to the X direction by selecting a closest node to its destination as a next hop in terms of the X coordinate until the packet reaches closely to the packet's destination. Then the packet is forwarded to the Y direction by selecting a closest node to its destination in terms of the Y coordinate. We use a back off mechanism in case that a next hop cannot be found using the proposed routing algorithm, which resolves loops while forwarding. The experimental results show that the proposed routing algorithm performs well like the existing routing algorithms Ad hoc On-demand Distance Vector and Greedy Perimeter Stateless Routing. It is expected to use the proposed routing algorithm in the digital battlefield of military environments and survival games of commercial environments.

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무선 센서 네트워크에서의 멀티미디어 데이터 전송을 위한 최적의 노드 비 겹침 다중경로 탐색 프로토콜 (An Optimized Node-Disjoint Multi-path Routing Protocol for Multimedia Data Transmission over Wireless Sensor Network)

  • 정성록;이정훈;노병희
    • 한국통신학회논문지
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    • 제33권11A호
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    • pp.1021-1033
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    • 2008
  • 최근 무선 센서 네트워크를 통해 멀티미디어 데이터를 전송하고자 하는 노력이 늘고 있다. 무선 센서 네트워크는 저 전력 소형 노드를 이용하며, 낮은 전송 속도를 갖는 네트워크이다. 하지만 멀티미디어 데이터는 비교적 큰 용량을 가지며, 전송 시 지연에 민감한 특성을 갖는다. 그러므로 무선 센서 네트워크를 이용하여 멀티미디어 데이터를 전송하는 것은 어려운 일이 아닐 수 없다. 따라서 본 논문에서는 무선 센서 네트워크 환경에서 멀티미디어 데이터 전송을 위해 경로의 겹침이 없는 노드 독립적인 (Node-Disjoint) Multi-path Routing방법을 제안한다. 대용량의 데이터 전송 시 기존의 Single-path Routing 방법은 하나의 경로만을 사용하기 때문에 특정 노드에 부하를 가중시켜 데이터 손실이나 지연을 야기 시킬 수 있지만, 본 논문에서 제안하는 TinyONDMR(Tiny Optimized Node-Disjoint Multi-path Routing)방법은 서로 분리된 다른 경로에 데이터를 분산시켜 전송함으로써, 네트워크의 성능을 향상시킨다. 또한 Multi-path를 찾기 위한 라우팅 과정에서 발생하는 라우팅 오버헤드를 줄여 네트워크 부하를 감소시킨다.

무선 멀티미디어 센서 네트워크에서 다중 경로와 다중 우선순위 기반의 라우팅 알고리즘 (Multipath and Multipriority based Routing Protocol for Wireless Multimedia Sensor Networks)

  • 이동훈;나빈 가우탐;변재영
    • 한국ITS학회 논문지
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    • 제10권3호
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    • pp.101-109
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    • 2011
  • 본 논문에서 소개하는 새로운 라우팅 프로토콜은 무선 멀티미디어 센서 네트워크에서 다중경로와 다중 우선순위 기반의 라우팅 프로토콜 (MMRP)이다. 제안된 MMRP는 소스부터 싱크까지 다중 라우팅 경로를 선택하고, 선택된 라우팅 경로 내의 잔여 에너지와 전송지연에 따라서 우선순위 레벨이 할당된다. 즉, MPEG 비디오의 경우 높은 우선순위를 갖는 I 프레임은 높은 우선순위의 라우팅 경로를 통해 전송이 되며, P와 B 프레임의 경우 낮은 우선순위를 갖는 라우팅 경로를 통해 전송되도록 한다. 제안된 MMRP 프로토콜은 무선 멀티미디어 센서 네트워크에서 낮은 전력소모 특성을 만족하면서 작은 전송 지연을 고려하는 시간 민감 응용 분야에 적용이 가능하다. MMRP 프로토콜에 대한 시뮬레이션 결과는 다중경로 라우팅을 지원하거나 지원하지 않는 프로토콜과 비교 시, 에너지 절약적인 부분에서는 23.48%에서 23.11% 그리고 지연 부분에서는 81.6%에서 32.01%로 향상을 보였다.

Interference Aware Multipath Routing in Multi-rate Wireless Sensor Networks

  • Lee, Kang Gun;Park, Hyung Kun
    • 한국멀티미디어학회논문지
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    • 제18권8호
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    • pp.909-914
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    • 2015
  • In wireless sensor networks, sensor nodes have a short transmission range and data is transferred from source to destination node using the multi-hop transmission. Sensor nodes are powered by battery and the link qualities are different, and the routing protocol in the wireless sensor network is one of the important technical issues. Multipath routing was proposed to reduce the data congestion and increase data throughput. In the multipath routing, however, each path can be interfered by the other path, and it can aggravate network performance. In this paper, we propose the multipath routing scheme for multi-rate wireless sensor networks. The multipath routing selects transmission paths to minimize transmission delay and path interference.

THE EFFICIENCY ROUTING ALGORITHM FOR MULTIMEDIA TRANSMISSION IN DIGITAL HOME NETWORK SCENARIOS

  • Nguyen Thanh Tung;Ahn Sea-Young;An Sun-Shin
    • 한국정보과학회:학술대회논문집
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    • 한국정보과학회 2006년도 한국컴퓨터종합학술대회 논문집 Vol.33 No.1 (D)
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    • pp.136-138
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    • 2006
  • The high-rate Wireless Personal Area Networks (WPANs) which IEEE 802.15.3 standard support, foster the Digital Home Network (DHN) scenarios with high rate multimedia data transmission. Actually, there are a few routing protocols for ad-hoc networks which considered the terminal location information and routing metric to reduce the energy consumption and optimize the routing path in mobile system. Based on other routing protocols, this paper presents the reliable location-based routing algorithm which is an adaptation to these networks.

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무선센서네트워크에서 네트워크 수명연장을 위한 잔여전력 기반 라우팅 프로토콜 (Residual Power based Routing Protocol to Extend Network Lifetime in Wireless Sensor Networks)

  • 원종호;박형근
    • 한국멀티미디어학회논문지
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    • 제21권5호
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    • pp.592-598
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    • 2018
  • In wireless sensor networks where there is no centralized base station, each node has limited transmission range and the multi-hop routing for transmitting data to the destination is the one of the important technical issues. In particular, the wireless sensor network is not powered by external power source but operates by its own battery, so it is required to maximize the network life through efficient use of energy. To balance the power consumption, the residual power based adaptive power control is required in routing protocol. In this paper, we propose a routing protocol that prolongs the network lifetime by balancing the power consumption among the nodes by controlling the transmit power according to the residual power. We evaluate the proposed routing protocol using extensive simulation, and the results show that the proposed routing scheme can balance the power consumption and prolong network lifetime.

Routing in Vehicular Ad Hoc Networks: Issues and Protocols

  • ;모상만;정일용
    • 한국멀티미디어학회지
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    • 제12권4호
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    • pp.28-40
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    • 2008
  • Vehicular ad hoc networks (VANETs) are a practical application class of wireless ad hoc networks, which consist of moving vehicles equipped with radio communication capabilities that collaborate to form a temporary network. This paper addresses issues and protocols of multihop routing in such emerging networks in the context of safety and infotainment applications. Due to the highly dynamic mobility of vehicles, frequent link breakage and short connection time are inevitable and, thus, the routing is a challenging task and interest for many researchers and industrial community. The frequent and dynamic change of topology makes the topology-based routing unreliable but the position-based routing more effective. The position-based routing consists of the location service which maps a node id to a geo-graphical position and the forwarding scheme which selects the next hop based on geo-graphical information of the node, its neighbors and the destination. The routing techniques are further categorized into geographical forwarding, trajectory forwarding and opportunistic forwarding based on the forwarding scheme. In this paper, we first present the distinguished properties of VANETs and the challenges and intractable issues posed in designing the routing protocols, followed by the comprehensive survey of existing routing protocols. Then, the different routing protocols designed for VANETs are compared in terms of characteristics, performance and application domains.

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

  • Thi, Thuyen Minh;Huynh, Thong;Kong, In-Yeup;Hwang, Won-Joo
    • 한국멀티미디어학회논문지
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    • 제17권9호
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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.

Capacity Assignment and Routing for Interactive Multimedia Service Networks

  • Lim, Byung-Ha;Park, June-Sung
    • Journal of Communications and Networks
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    • 제12권3호
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    • pp.246-252
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    • 2010
  • A binary linear integer program is formulated for the problem of expanding the capacity of a fiber optic network and routing the traffic to deliver new interactive multimedia services. A two-phase Lagrangian dual search procedure and a Lagrangian heuristic are developed. Computational results show superior performance of the two-phase subgradient optimization compared with the conventional one-phase approach.