The Experts below are selected from a list of 2205 Experts worldwide ranked by ideXlab platform
Hiroshi Harada - One of the best experts on this subject based on the ideXlab platform.
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Superframe division multi hop data collection with aggregation on wi sun profile for echonet lite
Wireless Communications and Networking Conference, 2014Co-Authors: Fumihide Kojima, Hiroshi HaradaAbstract:This paper proposes an effective multi-hop data collection scheme using a Superframe division technique with frame aggregation on a Wi-SUN profile for ECHONET Lite. In the proposed scheme, a Wi-SUN MAC layer profile deploying IEEE 802.15.4/4e-compliant LE Superframe-based multi-hop transmission mitigates the bottleneck problem by controlling the radio link numbers in a Superframe, thereby preventing the data collection throughput degradation expected in high-traffic situations such as emergencies. Computer simulation results confirm that the proposed Superframe division multi-hop data collection scheme with frame aggregation achieves over a 95% frame success probability under the high-traffic situation in which 1,000 meter nodes generate frames at a 10-minute interval.
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WCNC Workshops - Superframe division multi-hop data collection with aggregation on Wi-SUN profile for ECHONET Lite
2014 IEEE Wireless Communications and Networking Conference Workshops (WCNCW), 2014Co-Authors: Fumihide Kojima, Hiroshi HaradaAbstract:This paper proposes an effective multi-hop data collection scheme using a Superframe division technique with frame aggregation on a Wi-SUN profile for ECHONET Lite. In the proposed scheme, a Wi-SUN MAC layer profile deploying IEEE 802.15.4/4e-compliant LE Superframe-based multi-hop transmission mitigates the bottleneck problem by controlling the radio link numbers in a Superframe, thereby preventing the data collection throughput degradation expected in high-traffic situations such as emergencies. Computer simulation results confirm that the proposed Superframe division multi-hop data collection scheme with frame aggregation achieves over a 95% frame success probability under the high-traffic situation in which 1,000 meter nodes generate frames at a 10-minute interval.
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Low-energy and multi-hop enhancement in wireless smart utility networks
2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS), 2014Co-Authors: Fumihide Kojima, Hiroshi HaradaAbstract:This paper proposes an effective and low-energy multi-hop data collection scheme using a Superframe division technique with frame aggregation in the wireless smart utility networks (SUNs). In the proposed scheme, MAC layer profile deploying IEEE 802.15.4/4e-compliant low-energy (LE) Superframe-based multi-hop transmission mitigates the bottleneck problem by controlling the radio link numbers in a Superframe, thereby preventing the data collection throughput degradation expected in high-traffic situations such as emergencies. Computer simulation results confirm that the proposed Superframe division multi-hop data collection scheme with frame aggregation achieves over a 95% frame success probability under the high-traffic situation in which 1,000 meter nodes generate frames at a 10-minute interval.
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ICC - A study on IEEE 802.15.4e compliant low-power multi-hop SUN with frame aggregation
2013 IEEE International Conference on Communications (ICC), 2013Co-Authors: Fumihide Kojima, Hiroshi HaradaAbstract:This paper proposes a low-power multi-hop data frame transmission scheme to create a long-lived smart utility network (SUN), as standardized by IEEE 802.15 TG4g/4e. In the proposed scheme, low energy Superframe structure with turned-off beacons are employed to reduce power wastage, thereby providing effective sleep periods for each device. Moreover, multi-hop frame transmission is easily realized by constructing a tree-shaped topology with incoming and outgoing Superframes. Furthermore, in the proposed system, effective frame aggregation technology exploiting such low energy Superframe structure is employed in order to solve the bottle neck problems that seriously degrade utility data collection performance in SUN. The results of computer simulations confirm that the proposed scheme enables a greater than 90% frame success rate without error control while holding a less than 0.4% active period ratio in feasible SUN usage situations.
Fumihide Kojima - One of the best experts on this subject based on the ideXlab platform.
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Superframe division multi hop data collection with aggregation on wi sun profile for echonet lite
Wireless Communications and Networking Conference, 2014Co-Authors: Fumihide Kojima, Hiroshi HaradaAbstract:This paper proposes an effective multi-hop data collection scheme using a Superframe division technique with frame aggregation on a Wi-SUN profile for ECHONET Lite. In the proposed scheme, a Wi-SUN MAC layer profile deploying IEEE 802.15.4/4e-compliant LE Superframe-based multi-hop transmission mitigates the bottleneck problem by controlling the radio link numbers in a Superframe, thereby preventing the data collection throughput degradation expected in high-traffic situations such as emergencies. Computer simulation results confirm that the proposed Superframe division multi-hop data collection scheme with frame aggregation achieves over a 95% frame success probability under the high-traffic situation in which 1,000 meter nodes generate frames at a 10-minute interval.
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WCNC Workshops - Superframe division multi-hop data collection with aggregation on Wi-SUN profile for ECHONET Lite
2014 IEEE Wireless Communications and Networking Conference Workshops (WCNCW), 2014Co-Authors: Fumihide Kojima, Hiroshi HaradaAbstract:This paper proposes an effective multi-hop data collection scheme using a Superframe division technique with frame aggregation on a Wi-SUN profile for ECHONET Lite. In the proposed scheme, a Wi-SUN MAC layer profile deploying IEEE 802.15.4/4e-compliant LE Superframe-based multi-hop transmission mitigates the bottleneck problem by controlling the radio link numbers in a Superframe, thereby preventing the data collection throughput degradation expected in high-traffic situations such as emergencies. Computer simulation results confirm that the proposed Superframe division multi-hop data collection scheme with frame aggregation achieves over a 95% frame success probability under the high-traffic situation in which 1,000 meter nodes generate frames at a 10-minute interval.
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Low-energy and multi-hop enhancement in wireless smart utility networks
2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS), 2014Co-Authors: Fumihide Kojima, Hiroshi HaradaAbstract:This paper proposes an effective and low-energy multi-hop data collection scheme using a Superframe division technique with frame aggregation in the wireless smart utility networks (SUNs). In the proposed scheme, MAC layer profile deploying IEEE 802.15.4/4e-compliant low-energy (LE) Superframe-based multi-hop transmission mitigates the bottleneck problem by controlling the radio link numbers in a Superframe, thereby preventing the data collection throughput degradation expected in high-traffic situations such as emergencies. Computer simulation results confirm that the proposed Superframe division multi-hop data collection scheme with frame aggregation achieves over a 95% frame success probability under the high-traffic situation in which 1,000 meter nodes generate frames at a 10-minute interval.
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ICC - A study on IEEE 802.15.4e compliant low-power multi-hop SUN with frame aggregation
2013 IEEE International Conference on Communications (ICC), 2013Co-Authors: Fumihide Kojima, Hiroshi HaradaAbstract:This paper proposes a low-power multi-hop data frame transmission scheme to create a long-lived smart utility network (SUN), as standardized by IEEE 802.15 TG4g/4e. In the proposed scheme, low energy Superframe structure with turned-off beacons are employed to reduce power wastage, thereby providing effective sleep periods for each device. Moreover, multi-hop frame transmission is easily realized by constructing a tree-shaped topology with incoming and outgoing Superframes. Furthermore, in the proposed system, effective frame aggregation technology exploiting such low energy Superframe structure is employed in order to solve the bottle neck problems that seriously degrade utility data collection performance in SUN. The results of computer simulations confirm that the proposed scheme enables a greater than 90% frame success rate without error control while holding a less than 0.4% active period ratio in feasible SUN usage situations.
Paolo Remagnino - One of the best experts on this subject based on the ideXlab platform.
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Superframes, A Temporal Video Segmentation
arXiv: Computer Vision and Pattern Recognition, 2018Co-Authors: Hajar Sadeghi Sokeh, Vasileios Argyriou, Dorothy Monekosso, Paolo RemagninoAbstract:The goal of video segmentation is to turn video data into a set of concrete motion clusters that can be easily interpreted as building blocks of the video. There are some works on similar topics like detecting scene cuts in a video, but there is few specific research on clustering video data into the desired number of compact segments. It would be more intuitive, and more efficient, to work with perceptually meaningful entity obtained from a low-level grouping process which we call it Superframe. This paper presents a new simple and efficient technique to detect Superframes of similar content patterns in videos. We calculate the similarity of content-motion to obtain the strength of change between consecutive frames. With the help of existing optical flow technique using deep models, the proposed method is able to perform more accurate motion estimation efficiently. We also propose two criteria for measuring and comparing the performance of different algorithms on various databases. Experimental results on the videos from benchmark databases have demonstrated the effectiveness of the proposed method.
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ICPR - Superframes, A Temporal Video Segmentation
2018 24th International Conference on Pattern Recognition (ICPR), 2018Co-Authors: Hajar Sadeghi Sokeh, Vasileios Argyriou, Dorothy Monekosso, Paolo RemagninoAbstract:The goal of video segmentation is to turn video data into a set of concrete motion clusters that can be easily interpreted as building blocks of the video. There are some works on similar topics like detecting scene cuts in a video, but there is few specific research on clustering video data into the desired number of compact segments. It would be more intuitive, and more efficient, to work with perceptually meaningful entity obtained from a low-level grouping process which we call it ‘Superframe’. This paper presents a new simple and efficient technique to detect Superframes of similar content patterns in videos. We calculate the similarity of content-motion to obtain the strength of change between consecutive frames. With the help of existing optical flow technique using deep models, the proposed method is able to perform more accurate motion estimation efficiently. We also propose two criteria for measuring and comparing the performance of different algorithms on various databases. Experimental results on the videos from benchmark databases have demonstrated the effectiveness of the proposed method.
Soh, Sie Teng - One of the best experts on this subject based on the ideXlab platform.
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A Novel Distributed Pseudo TDMA Channel Access Protocol for Multi-Transmit-Receive Wireless Mesh Networks
'Institute of Electrical and Electronics Engineers (IEEE)', 2017Co-Authors: Xu Y., Chin K., Soh, Sie TengAbstract:IEEE A key approach to improve the capacity of Wireless Mesh Networks (WMNs) is to equip routers with multiple transmissions or receptions (MTR) capability. Thus, the resulting MTR WMN has significantly higher network capacity because routers can activate multiple links simultaneously. This, however, requires a MTR link scheduler that maximizes network capacity or equivalently, one that is capable of deriving a short schedule. Henceforth, we propose Period Controlled Pseudo Time Division Multiple Access (PCP-TDMA), a link scheduler that allows nodes to cooperatively reduce an initial link schedule or Superframe over time in a distributed manner. Routers are able to adapt the Superframe size iteratively using only local information to accommodate any topological changes. This means PCP-TDMA is particularly suited for use in large-scale MTR WMNs. We have evaluated PCP-TDMA in various network topologies, and compared it against ALGO-2, a centralized algorithm that uses global topological information to derive a schedule and thus serves as a benchmark. We also compare PCP-TDMA against two distributed approaches: JazzyMAC and ROMA. The results show that PCP-TDMA achieves similar performance with the centralized algorithm in all scenarios, and outperforms the distributed approaches significantly. Specifically, in a fully connected network, the resulting Superframe length of PCP-TDMA is less than 1/3 and 1/2 of JazzyMAC and ROMA, respectively
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Joint routing and scheduling in multi-Tx/Rx wireless mesh networks with random demands
'Elsevier BV', 2016Co-Authors: Wang L., Chin K., Soh, Sie TengAbstract:Multiple transmit or receive (MTR) capability is a promising approach that significantly improves the capacity of Wireless Mesh Networks (WMNs). A fundamental problem is deriving a minimal link schedule or Superframe that satisfies traffic demands. Existing MTR link schedulers or works that jointly consider routing and scheduling in wireless networks assume traffic demands are known in advance and are fixed. However, in practice, traffic demands are likely to be uncertain. Consequently, any computed solution will lead to either idle slots or congestion. Moreover, uncertain demands may cause a network operator to compute and install a new routing and Superframe frequently; this is likely to incur high signaling overheads, especially in large scale multi-hop WMNs. Henceforth, in this paper, we consider random traffic demands characterized by a polyhedral set. We model the problem as a semi-infinite Linear Program (LP). We then propose a novel heuristic algorithm, called Algo-PolyH, that jointly considers both routing and Superframe generation to produce a robust solution that is valid for all random demands that belong to a given polyhedral set. This fact is confirmed in our evaluation of Algo-PolyH in networks with varying number of degrees, number of flows, number of nodes and number of paths
Xiaojing Huang - One of the best experts on this subject based on the ideXlab platform.
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Superframe level time hopping system with variable contention access period for wireless body area communications
Personal Indoor and Mobile Radio Communications, 2011Co-Authors: Jian Zhang, Leif Hanlen, Andrew Y. Wang, Xiaojing HuangAbstract:Coexistence of multiple wireless body area networks (WBAN) is a very challenging problem because piconets move frequently and each piconet can have hundreds of sensors. The IEEE 802.15.6 task group is developing a standard based on Superframe-level frequency-hopping scheme, which is a good solution to the piconet coexistence problem without requiring coordination between piconets. However, its spectrum efficiency is very low when only a single piconet is operating. In this paper we propose a Superframe-level time-hopping scheme with variable contention access period. Compared to the frequency-hopping scheme, the proposed scheme has similar interference mitigation capability, but can achieve significant improvement in energy consumption, latency and spectrum efficiency.
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PIMRC - Superframe-level time-hopping system with variable contention access period for wireless body area communications
2011 IEEE 22nd International Symposium on Personal Indoor and Mobile Radio Communications, 2011Co-Authors: Jian Zhang, Leif Hanlen, Andrew Y. Wang, Xiaojing HuangAbstract:Coexistence of multiple wireless body area networks (WBAN) is a very challenging problem because piconets move frequently and each piconet can have hundreds of sensors. The IEEE 802.15.6 task group is developing a standard based on Superframe-level frequency-hopping scheme, which is a good solution to the piconet coexistence problem without requiring coordination between piconets. However, its spectrum efficiency is very low when only a single piconet is operating. In this paper we propose a Superframe-level time-hopping scheme with variable contention access period. Compared to the frequency-hopping scheme, the proposed scheme has similar interference mitigation capability, but can achieve significant improvement in energy consumption, latency and spectrum efficiency.
