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Gateway management system within the border based on traffic pattern and source address routing
Yutaka Izumi,Hideki Tode 한국멀티미디어학회 2009 한국멀티미디어학회 국제학술대회 Vol.2009 No.-
Service and application using the network have been increased in the present internet, especially like e-learning and multimedia contents distribution. Then we have to take action against various invalid accesses or attacks. However, several attacks are difficult to detect and take action, because Firewall and IDS/IPS (Intrusion Detection System / Intrusion Prevention System) inspect on each packet, not chains of packet. We are developing detecting and preventing system against the attacks based on traffic pattern. This system is able to detect the attacks by chains of packets between external and internal network. Then this system changes the route of malicious packets by source address to avoid the attacks, such as the resource-exhaustion attacks. In this paper, we suggest and describe the design and implementation of this system.
Flow-based Service Discipline for TCP Streaming in Advanced IP Router
Naotoshi Yoshihara,Hideki Tode,Koso Murakami 한국멀티미디어학회 2009 한국멀티미디어학회 국제학술대회 Vol.2009 No.-
Video-sharing applications using TCP (called "TCP streaming") like YouTube have been increased recently. However, it is difficult for the existing IP network to guarantee QoS of TCP streaming. So far, to achieve the QoS enhancement per flow, we have proposed the class-based output buffer control mechanism in QoS-aware router. In this paper, to guarantee more sophisticated QoS for TCP streaming, we propose the mechanism which calculates transmission bandwidth and buffer volume preferentially available (called "basic volume") according to active flows' condition estimated by measuring transmitted packets per flow. Furthermore, by computer simulation, the effectiveness of our proposal is verified.
Advanced Inter/Intra-Stream FEC Method in Distributed Multi-Server Network
Akihiro Fujimoto,Hideki Tode,Koso Murakami 한국멀티미디어학회 2009 한국멀티미디어학회 국제학술대회 Vol.2009 No.-
To establish seamless and highly robust contents distribution technology in the environment of so-called multi-server contents distribution network, we have proposed the new concept, Inter-Stream FEC, that means data recovery method between several streams by introducing redundant parity streams generated by inter-stream cooperation. In this paper, we extensively improve the original Inter-Stream FEC method. We focus on the recovery failure events in the original method, especially the events due to packet loss on the same link, and propose its remedy. The proposed method makes existing FEC and Inter-Stream FEC cooperate deeply and this leads to higher loss recovery ratio. Besides, we evaluate the original method and the extensively proposed method through computer simulation.
Configuration Method of P2P Network System with Transfer Support Nodes
Takeru Hiraishi,Hideki Tode 한국멀티미디어학회 2009 한국멀티미디어학회 국제학술대회 Vol.2009 No.-
The content distribution services via the Internet have become popular. However these services have some problems that prevent users from getting a file efficiently and there still remains much room for improving. In this paper, we focus on representative hybrid P2P[1] network application, BitTorrent[2], and try to resolve these problems. We propose the method for placing transfer support nodes, called "SupportNode", by service providers to allow users to get contents efficiently and evaluate the method by using computer simulation.
Autonomous Burst Access Control Cooperated with Adjacent Nodes in Wireless Multihop Networks
Yosuke Tanigawa,Makoto Mochiki,Hideki Tode,Koso Murakami 한국멀티미디어학회 2009 한국멀티미디어학회 국제학술대회 Vol.2009 No.-
The authors propose the packet transfer scheduling method to perform efficient data transfer in wireless multibop networks. In the proposed method, we set packet transfer rate, mainly according to the success rate of packet transfer at the sender nodes. In this paper, we consider the packet loads at the receiver nodes, and feed the load information back to the upstream nodes. Moreover, we assign channel resources equally to sender nodes that transfer packet to the same receiver node. Through these proposals, we enhance the network capacity keeping the throughput fairness between nodes.
Highly Reliable TCP Transfer Method with Error Correction Technology
Masaki Sakakibara,Yosuke Tanigawa,Hideki Tode 한국멀티미디어학회 2009 한국멀티미디어학회 국제학술대회 Vol.2009 No.-
TCP (Transmission Control Protocol)[1] offers congestion and retransmission control according to the network loads between End-to-End terminals. TCP is widely used regardless of wired or wireless networks. However, in TCP, consecutive packet losses decrease the sending rate. Thus, it is difficult to keep stable throughput. In this paper, we propose a method that packets are sent by FEC (Forward Error Correction)[2] while sender terminal judges to be in congestion. The proposed method can achieve better performance compared to conventional TCP Reno that is widely used in actual network.
Cluster-based Routing Method for Wireless Sensor Networks with Heterogeneous Node Types
Sampath Priyankara,Kazuhiko Kinoshita,Hideki Tode,Koso Murakami 한국멀티미디어학회 2009 한국멀티미디어학회 국제학술대회 Vol.2009 No.-
With advances of low-cost hardware such as CMOS cameras and microphones, multimedia sensor networking technologies have developed very rapidly in recent years. Maintaining higher alive node ratio and wider coverage area is indispensable for ubiquitous retrieval of multimedia contents such as video and audio streams, still images and scalar sensor data from the environment. To achieve those requirements, sensor network systems are gradually moving into heterogeneous designs, incorporating a variety of sensor nodes. In this paper, we propose a new cluster-based routing method for wireless sensor networks with heterogeneous node types. It selects cluster heads considering not only transmission power and residual energy of each node but also those of its adjacent nodes. Simulation results show that the proposed method significantly increases network lifetime and also maintains high coverage rate in comparison with existing methods.
A Construction Method of Cluster-tree Topology Suitable for Dense ZigBee Network
Junko Nagata,Yosuke Tanigawa,Hideki Tode,Koso Murakami 한국멀티미디어학회 2009 한국멀티미디어학회 국제학술대회 Vol.2009 No.-
In dense wireless sensor networks (WSNs), packet collisions between sensor nodes degrade the efficiency on power consumption and gathering measured data. In this paper, we focus on IEEE802.15.4/ZigBee, the standardized technologies suitable for WSNs, and form a dense sensor network with cluster-tree topology. We propose a construction method of cluster-tree with multiple channels. The performance of the method is evaluated using computer simulation.