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RISS 인기검색어
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- 저자 : Ngo Hoai Phong (검색결과 5 건)
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MRFR - Multipath-based Routing Protocol with Fast-Recovery of Failures on MANETs
( Hoai Phong Ngo ),( Myung Kyun Kim ) 한국인터넷정보학회 2012 KSII Transactions on Internet and Information Syst Vol.6 No.12
We propose a new multipath-based reliable routing protocol on MANETs, Multipath-based Reliable routing protocol with Fast-Recovery of failures (MRFR). For reliable message transmission, MRFR tries to find the most reliable path between a source and a destination considering the end-to-end packet reception reliability of the routes. The established path consists of a primary path that is used to transmit messages, and the secondary paths that are used to recover the path when detecting failures on the primary path. After establishing the path, the source transmits messages through the primary path. If a node detects a link failure during message transmission, it can recover the path locally by switching from the primary to the secondary path. By allowing the intermediate nodes to locally recover the route failure, the proposed protocol can handle the dynamic topological change of the MANETs efficiently. The simulation result using the QualNet simulator shows that the MRFR protocol performs better than other protocols in terms of the end-to-end message delivery ratio and fault-tolerance capability.
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MRFR - Multipath-based Routing Protocol with Fast-Recovery of Failures on MANETs
( Hoai Phong Ngo ),( Myung Kyun Kim ) 한국인터넷정보학회 2013 KSII Transactions on Internet and Information Syst Vol.7 No.2
We propose a new multipath-based reliable routing protocol on MANETs, Multipath-based Reliable routing protocol with Fast-Recovery of failures (MRFR). For reliable message transmission, MRFR tries to find the most reliable path between a source and a destination considering the end-to-end packet reception reliability of the routes. The established path consists of a primary path that is used to transmit messages, and the secondary paths that are used to recover the path when detecting failures on the primary path. After establishing the path, the source transmits messages through the primary path. If a node detects a link failure during message transmission, it can recover the path locally by switching from the primary to the secondary path. By allowing the intermediate nodes to locally recover the route failure, the proposed protocol can handle the dynamic topological change of the MANETs efficiently. The simulation result using the QualNet simulator shows that the MRFR protocol performs better than other protocols in terms of the end-to-end message delivery ratio and fault-tolerance capability.
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A Reliability-Guaranted Routing Protocol on Wireless Sensor Networks
Ngo Hoai Phong,Myung-Kyun Kim 한국통신학회 2010 한국통신학회 학술대회논문집 Vol.2010 No.11
In the distributed control systems, a sensor periodically collects a physical value from the environment and transmits the collected data to an actuator, which performs a control action based on the value received from the sensor. For stable control operation, those messages from sensors to actuators have to be transmitted reliably, and if the packet reception rate of the actuator becomes lower than a certain threshold, the performance of the control system degrades greatly [1]. In this paper, we propose a reliable message routing protocol for periodic messages on a wireless sensor network which guarantees a specified end-to-end target packet reception rate. The performance of the proposed protocol has been analyzed by simulation using QualNet simulator. The simulation result has shown that the proposed protocol outperforms other routing protocols.
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무선센서 네트워크에서 주기적 메시지에 대해 신뢰성 있는 메시지 전송을 위한 라우팅 프로토콜
호아이퐁(Ngo Hoai Phong),김명균(Myung-Kyun Kim) 제어로봇시스템학회 2011 제어·로봇·시스템학회 논문지 Vol.17 No.2
In industrial distributed control systems, sensors collect data from the physical environment periodically and transmit them to the actuators, which process the control operations based on the received data. For the effective operation of the control systems, the data transmitted by the sensors has to be delivered to the actuators reliably within the deadline, and if the message reception rate of the actuators becomes lower than a threshold, then the performance of the control systems drops greatly. This paper suggests a message routing protocol to transmit periodic messages reliably in a distributed control system based on wireless sensor networks. For reliable message transmission, the proposed protocol selects a routing path whose end-to-end message reception rate is the highest before transmitting data messages. The proposed protocol has the capability of maintaining a target message reception rate for each flow. To maintain the required target reception rate, each destination monitors the actual message reception rate periodically and transmits a feedback message to the source if it drops below the target reception rate. On receiving the feedback message, the source tries to find a new path which can satisfy the target rate. The performance of the proposed protocol has been evaluated using simulation and compared with other protocols in terms of the message reception rate, the message delay and delay jitter, and so on. The simulation results show that the proposed protocol has a higher message reception rate and comparable message delay and delay jitter to other protocols. The simulation results also show that the proposed protocol has an ability to adapt well to the dynamic network traffic change.
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