The Experts below are selected from a list of 9150 Experts worldwide ranked by ideXlab platform
Sadao Obana - One of the best experts on this subject based on the ideXlab platform.
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wireless channel detection based on fluctuation of Packet Arrival interval
International Conference on Networks, 2007Co-Authors: Yoshihisa Kondo, S Itaya, S Yamaguchi, P Davis, R Suzuki, Sadao ObanaAbstract:Channel detection is necessary for control of channel usage in multi-user and multi-channel wireless networks. In this paper, we propose a real time wireless channel detection method based on measuring fluctuations of Packet Arrival intervals in networks using IEEE802.11 media access protocol. We have used simulations to show the relationship between the congestion on wireless channels and fluctuation of Packet Arrival intervals and show that the quality of a VoIP session can be roughly estimated by measuring Arrival interval of periodically generated Packets, such as standard HELLO Packets which are used for route management. Experiments using standard Linux PCs and WLAN interface cards confirm that the measurement of fluctuations of HELLO Packet Arrival time is possible.
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ICON - Wireless Channel Detection Based on Fluctuation of Packet Arrival Interval
2007 15th IEEE International Conference on Networks, 2007Co-Authors: Yoshihisa Kondo, S Itaya, S Yamaguchi, P Davis, R Suzuki, Sadao ObanaAbstract:Channel detection is necessary for control of channel usage in multi-user and multi-channel wireless networks. In this paper, we propose a real time wireless channel detection method based on measuring fluctuations of Packet Arrival intervals in networks using IEEE802.11 media access protocol. We have used simulations to show the relationship between the congestion on wireless channels and fluctuation of Packet Arrival intervals and show that the quality of a VoIP session can be roughly estimated by measuring Arrival interval of periodically generated Packets, such as standard HELLO Packets which are used for route management. Experiments using standard Linux PCs and WLAN interface cards confirm that the measurement of fluctuations of HELLO Packet Arrival time is possible.
Hussein T Mouftah - One of the best experts on this subject based on the ideXlab platform.
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a traffic adaptive inter cluster head delay control scheme in wsns
International Symposium on Computers and Communications, 2013Co-Authors: Irfan Alanbagi, Melike Erolkantarci, Hussein T MouftahAbstract:In critical infrastructure monitoring applications, the Packet Arrival rates of a Wireless Sensor Network (WSN) may abruptly increase when cascaded failures are observed in the monitored environment. WSNs with cluster-tree topologies could experience excessive delays because of this increase in Packet Arrival rates. Therefore, there should be an optimum operating point in the network where the network could accommodate high Packet Arrival rates with low latency. In this paper, we propose an adaptive scheme that can achieve low latency while maintaining high reliability values in cluster-tree based WSNs. Furthermore, our scheme provides Quality of Service (QoS) differentiation to high priority data. Analytical and simulation results show that our scheme significantly reduces the delay while maintaining high reliability and energy efficiency values.
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ISCC - A traffic adaptive inter-cluster head delay control scheme in WSNs
2013 IEEE Symposium on Computers and Communications (ISCC), 2013Co-Authors: Irfan Al-anbagi, Melike Erol-kantarci, Hussein T MouftahAbstract:In critical infrastructure monitoring applications, the Packet Arrival rates of a Wireless Sensor Network (WSN) may abruptly increase when cascaded failures are observed in the monitored environment. WSNs with cluster-tree topologies could experience excessive delays because of this increase in Packet Arrival rates. Therefore, there should be an optimum operating point in the network where the network could accommodate high Packet Arrival rates with low latency. In this paper, we propose an adaptive scheme that can achieve low latency while maintaining high reliability values in cluster-tree based WSNs. Furthermore, our scheme provides Quality of Service (QoS) differentiation to high priority data. Analytical and simulation results show that our scheme significantly reduces the delay while maintaining high reliability and energy efficiency values.
Y Altunbasak - One of the best experts on this subject based on the ideXlab platform.
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estimating Packet Arrival times in bursty video applications
International Conference on Multimedia and Expo, 2005Co-Authors: Ali C Begen, Y AltunbasakAbstract:In retransmission-based error-control methods, the most fundamental yet the paramount problem is to determine how long the sender (or the receiver) should wait before deciding that an unacknowledged (or a missing) Packet is lost. This waiting time is generally referred to as retransmission timeout (RTO). An accurate RTO estimation has two main advantages: First, the lost Packets can be identified earlier, and hence, can be recovered faster. Second, redundant retransmissions can be avoided, which subsequently not only saves the network resources, but also helps existing network congestion alleviate sooner. Although it is statistically possible to prevent any unnecessary retransmission at the expense of long error-recovery times, such an approach can only be justified for data applications; it is not well-suited for delay-sensitive applications, for which the agility in recovering the lost Packets is as important. With this motivation, we recently introduced an RTO estimation algorithm for delay-sensitive applications (A. C. Begen et al., 2004). Provided that the Packets are transmitted at equal intervals, this technique successfully estimates the Arrival times based on the interArrival-time observations. In this study, we relax the requirement of equal transmission intervals and generalize our technique to handle bursty video applications
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ICME - Estimating Packet Arrival Times in Bursty Video Applications
2005 IEEE International Conference on Multimedia and Expo, 1Co-Authors: Ali C Begen, Y AltunbasakAbstract:In retransmission-based error-control methods, the most fundamental yet the paramount problem is to determine how long the sender (or the receiver) should wait before deciding that an unacknowledged (or a missing) Packet is lost. This waiting time is generally referred to as retransmission timeout (RTO). An accurate RTO estimation has two main advantages: First, the lost Packets can be identified earlier, and hence, can be recovered faster. Second, redundant retransmissions can be avoided, which subsequently not only saves the network resources, but also helps existing network congestion alleviate sooner. Although it is statistically possible to prevent any unnecessary retransmission at the expense of long error-recovery times, such an approach can only be justified for data applications; it is not well-suited for delay-sensitive applications, for which the agility in recovering the lost Packets is as important. With this motivation, we recently introduced an RTO estimation algorithm for delay-sensitive applications (A. C. Begen et al., 2004). Provided that the Packets are transmitted at equal intervals, this technique successfully estimates the Arrival times based on the interArrival-time observations. In this study, we relax the requirement of equal transmission intervals and generalize our technique to handle bursty video applications
Masayuki Arai - One of the best experts on this subject based on the ideXlab platform.
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development and evaluation of visualization tools for understanding the control method of tcp Packet Arrival order and the difference between tcp and udp
Computer and Information Technology, 2012Co-Authors: Shogo Takahashi, Masayuki AraiAbstract:This paper describes the design, implementation, and evaluation of visualization tools for understanding the control method of TCP Packet Arrival order and the difference between TCP and UDP. TCP/IP protocols have grown to be the fundamental technology for computer networks and the Internet. As a result, communication and computer engineers have to learn these protocols. This paper examines the problems in the TCP/IP course and proposes two tools to solve these problems. The first tool is to help with learning the control method of TCP Packet Arrival order. The second tool is for learning the differences between TCP and UDP. The two tools have a Packet capturing function and can display real communication data without any special hardware. Evaluation results show that the tools are effective for learning the protocols.
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CIT - Development and Evaluation of Visualization Tools for Understanding the Control Method of TCP Packet Arrival Order and the Difference between TCP and UDP
2012 IEEE 12th International Conference on Computer and Information Technology, 2012Co-Authors: Shogo Takahashi, Masayuki AraiAbstract:This paper describes the design, implementation, and evaluation of visualization tools for understanding the control method of TCP Packet Arrival order and the difference between TCP and UDP. TCP/IP protocols have grown to be the fundamental technology for computer networks and the Internet. As a result, communication and computer engineers have to learn these protocols. This paper examines the problems in the TCP/IP course and proposes two tools to solve these problems. The first tool is to help with learning the control method of TCP Packet Arrival order. The second tool is for learning the differences between TCP and UDP. The two tools have a Packet capturing function and can display real communication data without any special hardware. Evaluation results show that the tools are effective for learning the protocols.
Ki Won Sung - One of the best experts on this subject based on the ideXlab platform.
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Impact of Packet Arrivals on Wi-Fi and Cellular System Sharing Unlicensed Spectrum
IEEE Transactions on Vehicular Technology, 2016Co-Authors: Yujae Song, Ki Won SungAbstract:We investigate the coexistence performance of Wi-Fi and cellular systems under an unlicensed spectrum sharing environment. For this, we provide a mathematical framework based on queuing theory depicting the time-domain behaviors of a Wi-Fi access point (AP) and a cellular small-cell base station (SCBS) under unlicensed spectrum sharing. Based on the proposed framework, we make an analysis of the delay performance of both systems with respect to the changes in their Packet Arrival rates. Through the analysis, we identify the maximum allowable Packet Arrival rates of both systems, under which the required Wi-Fi delay performance is achieved without spectrum etiquette for coexistence at the cellular SCBS, such as carrier-sensing adaptive transmission. This will serve as a guideline for the cellular SCBS on when it needs to employ the spectrum etiquette.
