The Experts below are selected from a list of 11415 Experts worldwide ranked by ideXlab platform
Rahim Tafazolli - One of the best experts on this subject based on the ideXlab platform.
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Adaptive softer handover algorithm for high altitude platform station UMTS with Onboard Power resource sharing
The 5th International Symposium on Wireless Personal Multimedia Communications, 1Co-Authors: Woo Lip Lim, Yu Chiann Foo, Rahim TafazolliAbstract:In the high altitude platform station (HAPS) Universal Mobile Telecommunications System (UMTS), the Power resource Onboard the platform can be shared among all base stations since all the base stations' transmit antenna beams originate from the same phased array antenna Onboard the platform. An adaptive softer handover (SHO) algorithm for HAPS UMTS with Onboard Power resource sharing is proposed. The algorithm uses both the platform's downlink output Power and individual base stations' downlink output Powers to dynamically adjust the mobiles' SHO add and drop margins. Simulation results obtained show that with proper selection of design parameters, the proposed adaptive SHO algorithm outperforms the conventional SHO algorithm in both quality of service and resource utilization.
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Centralized downlink call admission control for high altitude platform station UMTS with Onboard Power resource sharing
Proceedings IEEE 56th Vehicular Technology Conference, 1Co-Authors: Yu Chiann Foo, Woo Lip Lim, Rahim TafazolliAbstract:One of the unique characteristics of high altitude platform station (HAPS) Universal Mobile Telecommunications System (UMTS) is that the transmit antenna beams of all the base stations originate from the same phased array antenna Onboard the platform, so it is possible for the base stations to share the limited Power resource available Onboard the HAPS. We propose and analyze a downlink call admission control (CAC) scheme for HAPS UMTS that manages the downlink output Power centrally at the platform level and allocates the Power to the cells based on their demands. Simulation results show that the proposed scheme is able to achieve a better grade of service (GoS) as compared to the conventional scheme where Power is managed at individual base stations.
Ryuma Niiyama - One of the best experts on this subject based on the ideXlab platform.
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IROS - An Untethered 216-mg Insect-Sized Jumping Robot with Wireless Power Transmission
2020 IEEE RSJ International Conference on Intelligent Robots and Systems (IROS), 2020Co-Authors: Riccy Kurniawan, Tamaki Fukudome, Hao Qiu, Makoto Takamiya, Yoshihiro Kawahara, Jinkyu Yang, Ryuma NiiyamaAbstract:We present the first demonstration of a battery-free untethered wirelessly Powered sub-gram jumping robot on an insect-scale. In order to operate the insect-sized robot autonomously, the limitation in battery use emphasizes the need for a wireless Power transmission system as an Onboard Power solution. We designed a wireless Power transmission system based on inductive coupling to Power the Shape Memory Alloy (SMA), which serves as an elastic energy storage element and actuator for the jumping robot. The assembled mechanical structures, Onboard Power and electronics yield a 2 mm (high) × 24 mm (long) × 12 mm (wide) robot with ∼a weight of 216 mg. The experiments show that our jumping robot wirelessly lift-off up to 5.75 times its body length and repeats the jump around 7 times per minute. To date, out of the several untethered sub-gram insect-scale jumping robots with Onboard Power, this is the first wirelessly Powered robot with the highest jumping performance. The novelty in this work, which addresses the engineering challenges in insect-scale jumping robots, is an untethered wirelessly Powered design that achieves dynamic jumping maneuvers, and has self-righting ability.
Yu Chiann Foo - One of the best experts on this subject based on the ideXlab platform.
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Adaptive softer handover algorithm for high altitude platform station UMTS with Onboard Power resource sharing
The 5th International Symposium on Wireless Personal Multimedia Communications, 1Co-Authors: Woo Lip Lim, Yu Chiann Foo, Rahim TafazolliAbstract:In the high altitude platform station (HAPS) Universal Mobile Telecommunications System (UMTS), the Power resource Onboard the platform can be shared among all base stations since all the base stations' transmit antenna beams originate from the same phased array antenna Onboard the platform. An adaptive softer handover (SHO) algorithm for HAPS UMTS with Onboard Power resource sharing is proposed. The algorithm uses both the platform's downlink output Power and individual base stations' downlink output Powers to dynamically adjust the mobiles' SHO add and drop margins. Simulation results obtained show that with proper selection of design parameters, the proposed adaptive SHO algorithm outperforms the conventional SHO algorithm in both quality of service and resource utilization.
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Centralized downlink call admission control for high altitude platform station UMTS with Onboard Power resource sharing
Proceedings IEEE 56th Vehicular Technology Conference, 1Co-Authors: Yu Chiann Foo, Woo Lip Lim, Rahim TafazolliAbstract:One of the unique characteristics of high altitude platform station (HAPS) Universal Mobile Telecommunications System (UMTS) is that the transmit antenna beams of all the base stations originate from the same phased array antenna Onboard the platform, so it is possible for the base stations to share the limited Power resource available Onboard the HAPS. We propose and analyze a downlink call admission control (CAC) scheme for HAPS UMTS that manages the downlink output Power centrally at the platform level and allocates the Power to the cells based on their demands. Simulation results show that the proposed scheme is able to achieve a better grade of service (GoS) as compared to the conventional scheme where Power is managed at individual base stations.
Woo Lip Lim - One of the best experts on this subject based on the ideXlab platform.
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Adaptive softer handover algorithm for high altitude platform station UMTS with Onboard Power resource sharing
The 5th International Symposium on Wireless Personal Multimedia Communications, 1Co-Authors: Woo Lip Lim, Yu Chiann Foo, Rahim TafazolliAbstract:In the high altitude platform station (HAPS) Universal Mobile Telecommunications System (UMTS), the Power resource Onboard the platform can be shared among all base stations since all the base stations' transmit antenna beams originate from the same phased array antenna Onboard the platform. An adaptive softer handover (SHO) algorithm for HAPS UMTS with Onboard Power resource sharing is proposed. The algorithm uses both the platform's downlink output Power and individual base stations' downlink output Powers to dynamically adjust the mobiles' SHO add and drop margins. Simulation results obtained show that with proper selection of design parameters, the proposed adaptive SHO algorithm outperforms the conventional SHO algorithm in both quality of service and resource utilization.
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Centralized downlink call admission control for high altitude platform station UMTS with Onboard Power resource sharing
Proceedings IEEE 56th Vehicular Technology Conference, 1Co-Authors: Yu Chiann Foo, Woo Lip Lim, Rahim TafazolliAbstract:One of the unique characteristics of high altitude platform station (HAPS) Universal Mobile Telecommunications System (UMTS) is that the transmit antenna beams of all the base stations originate from the same phased array antenna Onboard the platform, so it is possible for the base stations to share the limited Power resource available Onboard the HAPS. We propose and analyze a downlink call admission control (CAC) scheme for HAPS UMTS that manages the downlink output Power centrally at the platform level and allocates the Power to the cells based on their demands. Simulation results show that the proposed scheme is able to achieve a better grade of service (GoS) as compared to the conventional scheme where Power is managed at individual base stations.
Riccy Kurniawan - One of the best experts on this subject based on the ideXlab platform.
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IROS - An Untethered 216-mg Insect-Sized Jumping Robot with Wireless Power Transmission
2020 IEEE RSJ International Conference on Intelligent Robots and Systems (IROS), 2020Co-Authors: Riccy Kurniawan, Tamaki Fukudome, Hao Qiu, Makoto Takamiya, Yoshihiro Kawahara, Jinkyu Yang, Ryuma NiiyamaAbstract:We present the first demonstration of a battery-free untethered wirelessly Powered sub-gram jumping robot on an insect-scale. In order to operate the insect-sized robot autonomously, the limitation in battery use emphasizes the need for a wireless Power transmission system as an Onboard Power solution. We designed a wireless Power transmission system based on inductive coupling to Power the Shape Memory Alloy (SMA), which serves as an elastic energy storage element and actuator for the jumping robot. The assembled mechanical structures, Onboard Power and electronics yield a 2 mm (high) × 24 mm (long) × 12 mm (wide) robot with ∼a weight of 216 mg. The experiments show that our jumping robot wirelessly lift-off up to 5.75 times its body length and repeats the jump around 7 times per minute. To date, out of the several untethered sub-gram insect-scale jumping robots with Onboard Power, this is the first wirelessly Powered robot with the highest jumping performance. The novelty in this work, which addresses the engineering challenges in insect-scale jumping robots, is an untethered wirelessly Powered design that achieves dynamic jumping maneuvers, and has self-righting ability.
