The Experts below are selected from a list of 2970 Experts worldwide ranked by ideXlab platform
Douglas Sicker - One of the best experts on this subject based on the ideXlab platform.
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an analytical model for efficient indoor thz access point deployment
Wireless Communications and Networking Conference, 2020Co-Authors: Rohit Singh, Douglas SickerAbstract:Ultra-densification of user equipment (UE) and access points (APs) are anticipated to take a toll on the future Spectrum needs. Higher frequency bands, such as mmWave (30-300GHz) and THz Spectrum (0.3-10THz), can be used to cater to the high-throughput needs of ultra-dense networks. These high-frequency bands have a tremendous amount of green-filed Contiguous Spectrum, ranging in hundreds of GHz. However, these bands, especially the THz bands, face numerous challenges, such as high spreading, absorption, and penetration losses. To combat these challenges, the THz-APs need to be either equipped with high transmit power, high antenna gains (i.e., narrow antenna beams), or limit the communication to short-ranges. All of these factors are bounded due to technical or economic challenges, which will result in a “distance-power dilemma” while deciding on the deployment strategy of THz-APs. In this paper, we present an analytical model to deploy THz-APs in an indoor setting efficiently. We further show through extensive numerical analysis, the optimal number of APs and optimal room length for different blocks of the THz Spectrum. Furthermore, these THz-APs need to be efficiently packed to avoid outages due to handoffs, which can add more complexity to the dilemma. To mitigate the packing problem, we propose two solutions over the optimal solution: (a) Radius Increase, and (b) Repeater Assistance, and present an analytical model for each.
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an analytical model for efficient indoor thz access point deployment
arXiv: Networking and Internet Architecture, 2020Co-Authors: Rohit Singh, Douglas SickerAbstract:Ultra-densification of user equipment (UE) and access points (APs) are anticipated to take a toll on the future Spectrum needs. Higher frequency bands, such as mmWave ($30$-$300GHz$) and THz Spectrum ($0.3$-$10THz$), can be used to cater to the high-throughput needs of ultra-dense networks. These high-frequency bands have a tremendous amount of \textit{green-filed Contiguous Spectrum}, ranging in hundreds of $GHz$. However, these bands, especially the THz bands, face numerous challenges, such as high spreading, absorption, and penetration losses. To combat these challenges, the THz-APs need to be either equipped with high transmit power, high antenna gains (i.e., narrow antenna beams), or limit the communication to short-ranges. All of these factors are bounded due to technical or economic challenges, which will result in a \textit{"distance-power dilemma"} while deciding on the deployment strategy of THz-APs. In this paper, we present an analytical model to deploy THz-APs in an indoor setting efficiently. We further show through extensive numerical analysis, the optimal number of APs and optimal room length for different blocks of the THz Spectrum. Furthermore, these THz-APs need to be efficiently packed to avoid outages due to handoffs, which can add more complexity to the dilemma. To mitigate the packing problem, we propose two solutions over the optimal solution: (a) Radius Increase, and (b) Repeater Assistance, and present an analytical model for each.
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An Analytical Model for Efficient Indoor THz Access Point Deployment.
arXiv: Networking and Internet Architecture, 2020Co-Authors: Rohit Singh, Douglas SickerAbstract:Ultra-densification of user equipment (UE) and access points (APs) are anticipated to take a toll on the future Spectrum needs. Higher frequency bands, such as mmWave ($30$-$300GHz$) and THz Spectrum ($0.3$-$10THz$), can be used to cater to the high-throughput needs of ultra-dense networks. These high-frequency bands have a tremendous amount of \textit{green-filed Contiguous Spectrum}, ranging in hundreds of $GHz$. However, these bands, especially the THz bands, face numerous challenges, such as high spreading, absorption, and penetration losses. To combat these challenges, the THz-APs need to be either equipped with high transmit power, high antenna gains (i.e., narrow antenna beams), or limit the communication to short-ranges. All of these factors are bounded due to technical or economic challenges, which will result in a \textit{"distance-power dilemma"} while deciding on the deployment strategy of THz-APs. In this paper, we present an analytical model to deploy THz-APs in an indoor setting efficiently. We further show through extensive numerical analysis, the optimal number of APs and optimal room length for different blocks of the THz Spectrum. Furthermore, these THz-APs need to be efficiently packed to avoid outages due to handoffs, which can add more complexity to the dilemma. To mitigate the packing problem, we propose two solutions over the optimal solution: (a) Radius Increase, and (b) Repeater Assistance, and present an analytical model for each.
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WCNC - An Analytical Model for Efficient Indoor THz Access Point Deployment
2020 IEEE Wireless Communications and Networking Conference (WCNC), 2020Co-Authors: Rohit Singh, Douglas SickerAbstract:Ultra-densification of user equipment (UE) and access points (APs) are anticipated to take a toll on the future Spectrum needs. Higher frequency bands, such as mmWave (30-300GHz) and THz Spectrum (0.3-10THz), can be used to cater to the high-throughput needs of ultra-dense networks. These high-frequency bands have a tremendous amount of green-filed Contiguous Spectrum, ranging in hundreds of GHz. However, these bands, especially the THz bands, face numerous challenges, such as high spreading, absorption, and penetration losses. To combat these challenges, the THz-APs need to be either equipped with high transmit power, high antenna gains (i.e., narrow antenna beams), or limit the communication to short-ranges. All of these factors are bounded due to technical or economic challenges, which will result in a “distance-power dilemma” while deciding on the deployment strategy of THz-APs. In this paper, we present an analytical model to deploy THz-APs in an indoor setting efficiently. We further show through extensive numerical analysis, the optimal number of APs and optimal room length for different blocks of the THz Spectrum. Furthermore, these THz-APs need to be efficiently packed to avoid outages due to handoffs, which can add more complexity to the dilemma. To mitigate the packing problem, we propose two solutions over the optimal solution: (a) Radius Increase, and (b) Repeater Assistance, and present an analytical model for each.
Jin Sam Kwak - One of the best experts on this subject based on the ideXlab platform.
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multicarrier technology for 4g wimax system wimax lte update
IEEE Communications Magazine, 2010Co-Authors: Yihshen Chen, Paul Cheng, Young Soo Yuk, Ronny Yongho Kim, Jin Sam KwakAbstract:As one of the candidate fourth-generation mobile communication systems, the IEEE 802.16 m-based WiMAX 2.0 system is required to provide up to 1 Gb/s peak transmission rate. The most efficient solution to achieve this challenging objective is to utilize wider channel bandwidth. Multicarrier is the technology to utilize wider bandwidth for parallel data transmission across multiple RF carriers, which is well agreed as one of the key technologies to satisfy ITU-R IMTAdvanced requirements. As the evolution of the IEEE 802.16 e-based WiMAX 1.0 system, IEEE 802.16 m specifies physical and MAC layers to enable multicarrier technology for the WiMAX 2.0 system. This can lead to more than 1 Gb/s peak transmission rate for low-mobility users and 100 Mb/s peak transmission rate for high-mobility users. By having the protocol structure with a common MAC entity to control transmission by multiple physical-layer connections over different RF carriers, the network operator can aggregate either Contiguous or non-Contiguous Spectrum resources with higher deployment flexibility, user throughput, and Spectrum efficiency. This article provides an overview of the multicarrier technology supported by the IEEE 802.16 m draft standard1 for WiMAX 2.0 system, including not only the general operation principle but also some details of physical layer and MAC layer support.
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Multicarrier technology for 4G WiMax system [WiMAX/LTE Update]
IEEE Communications Magazine, 2010Co-Authors: Yihshen Chen, Paul Cheng, Young Soo Yuk, Ronny Yongho Kim, Jin Sam KwakAbstract:As one of the candidate fourth-generation mobile communication systems, the IEEE 802.16 m-based WiMAX 2.0 system is required to provide up to 1 Gb/s peak transmission rate. The most efficient solution to achieve this challenging objective is to utilize wider channel bandwidth. Multicarrier is the technology to utilize wider bandwidth for parallel data transmission across multiple RF carriers, which is well agreed as one of the key technologies to satisfy ITU-R IMTAdvanced requirements. As the evolution of the IEEE 802.16 e-based WiMAX 1.0 system, IEEE 802.16 m specifies physical and MAC layers to enable multicarrier technology for the WiMAX 2.0 system. This can lead to more than 1 Gb/s peak transmission rate for low-mobility users and 100 Mb/s peak transmission rate for high-mobility users. By having the protocol structure with a common MAC entity to control transmission by multiple physical-layer connections over different RF carriers, the network operator can aggregate either Contiguous or non-Contiguous Spectrum resources with higher deployment flexibility, user throughput, and Spectrum efficiency. This article provides an overview of the multicarrier technology supported by the IEEE 802.16 m draft standard1 for WiMAX 2.0 system, including not only the general operation principle but also some details of physical layer and MAC layer support.
Rohit Singh - One of the best experts on this subject based on the ideXlab platform.
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an analytical model for efficient indoor thz access point deployment
Wireless Communications and Networking Conference, 2020Co-Authors: Rohit Singh, Douglas SickerAbstract:Ultra-densification of user equipment (UE) and access points (APs) are anticipated to take a toll on the future Spectrum needs. Higher frequency bands, such as mmWave (30-300GHz) and THz Spectrum (0.3-10THz), can be used to cater to the high-throughput needs of ultra-dense networks. These high-frequency bands have a tremendous amount of green-filed Contiguous Spectrum, ranging in hundreds of GHz. However, these bands, especially the THz bands, face numerous challenges, such as high spreading, absorption, and penetration losses. To combat these challenges, the THz-APs need to be either equipped with high transmit power, high antenna gains (i.e., narrow antenna beams), or limit the communication to short-ranges. All of these factors are bounded due to technical or economic challenges, which will result in a “distance-power dilemma” while deciding on the deployment strategy of THz-APs. In this paper, we present an analytical model to deploy THz-APs in an indoor setting efficiently. We further show through extensive numerical analysis, the optimal number of APs and optimal room length for different blocks of the THz Spectrum. Furthermore, these THz-APs need to be efficiently packed to avoid outages due to handoffs, which can add more complexity to the dilemma. To mitigate the packing problem, we propose two solutions over the optimal solution: (a) Radius Increase, and (b) Repeater Assistance, and present an analytical model for each.
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an analytical model for efficient indoor thz access point deployment
arXiv: Networking and Internet Architecture, 2020Co-Authors: Rohit Singh, Douglas SickerAbstract:Ultra-densification of user equipment (UE) and access points (APs) are anticipated to take a toll on the future Spectrum needs. Higher frequency bands, such as mmWave ($30$-$300GHz$) and THz Spectrum ($0.3$-$10THz$), can be used to cater to the high-throughput needs of ultra-dense networks. These high-frequency bands have a tremendous amount of \textit{green-filed Contiguous Spectrum}, ranging in hundreds of $GHz$. However, these bands, especially the THz bands, face numerous challenges, such as high spreading, absorption, and penetration losses. To combat these challenges, the THz-APs need to be either equipped with high transmit power, high antenna gains (i.e., narrow antenna beams), or limit the communication to short-ranges. All of these factors are bounded due to technical or economic challenges, which will result in a \textit{"distance-power dilemma"} while deciding on the deployment strategy of THz-APs. In this paper, we present an analytical model to deploy THz-APs in an indoor setting efficiently. We further show through extensive numerical analysis, the optimal number of APs and optimal room length for different blocks of the THz Spectrum. Furthermore, these THz-APs need to be efficiently packed to avoid outages due to handoffs, which can add more complexity to the dilemma. To mitigate the packing problem, we propose two solutions over the optimal solution: (a) Radius Increase, and (b) Repeater Assistance, and present an analytical model for each.
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An Analytical Model for Efficient Indoor THz Access Point Deployment.
arXiv: Networking and Internet Architecture, 2020Co-Authors: Rohit Singh, Douglas SickerAbstract:Ultra-densification of user equipment (UE) and access points (APs) are anticipated to take a toll on the future Spectrum needs. Higher frequency bands, such as mmWave ($30$-$300GHz$) and THz Spectrum ($0.3$-$10THz$), can be used to cater to the high-throughput needs of ultra-dense networks. These high-frequency bands have a tremendous amount of \textit{green-filed Contiguous Spectrum}, ranging in hundreds of $GHz$. However, these bands, especially the THz bands, face numerous challenges, such as high spreading, absorption, and penetration losses. To combat these challenges, the THz-APs need to be either equipped with high transmit power, high antenna gains (i.e., narrow antenna beams), or limit the communication to short-ranges. All of these factors are bounded due to technical or economic challenges, which will result in a \textit{"distance-power dilemma"} while deciding on the deployment strategy of THz-APs. In this paper, we present an analytical model to deploy THz-APs in an indoor setting efficiently. We further show through extensive numerical analysis, the optimal number of APs and optimal room length for different blocks of the THz Spectrum. Furthermore, these THz-APs need to be efficiently packed to avoid outages due to handoffs, which can add more complexity to the dilemma. To mitigate the packing problem, we propose two solutions over the optimal solution: (a) Radius Increase, and (b) Repeater Assistance, and present an analytical model for each.
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WCNC - An Analytical Model for Efficient Indoor THz Access Point Deployment
2020 IEEE Wireless Communications and Networking Conference (WCNC), 2020Co-Authors: Rohit Singh, Douglas SickerAbstract:Ultra-densification of user equipment (UE) and access points (APs) are anticipated to take a toll on the future Spectrum needs. Higher frequency bands, such as mmWave (30-300GHz) and THz Spectrum (0.3-10THz), can be used to cater to the high-throughput needs of ultra-dense networks. These high-frequency bands have a tremendous amount of green-filed Contiguous Spectrum, ranging in hundreds of GHz. However, these bands, especially the THz bands, face numerous challenges, such as high spreading, absorption, and penetration losses. To combat these challenges, the THz-APs need to be either equipped with high transmit power, high antenna gains (i.e., narrow antenna beams), or limit the communication to short-ranges. All of these factors are bounded due to technical or economic challenges, which will result in a “distance-power dilemma” while deciding on the deployment strategy of THz-APs. In this paper, we present an analytical model to deploy THz-APs in an indoor setting efficiently. We further show through extensive numerical analysis, the optimal number of APs and optimal room length for different blocks of the THz Spectrum. Furthermore, these THz-APs need to be efficiently packed to avoid outages due to handoffs, which can add more complexity to the dilemma. To mitigate the packing problem, we propose two solutions over the optimal solution: (a) Radius Increase, and (b) Repeater Assistance, and present an analytical model for each.
Yihshen Chen - One of the best experts on this subject based on the ideXlab platform.
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multicarrier technology for 4g wimax system wimax lte update
IEEE Communications Magazine, 2010Co-Authors: Yihshen Chen, Paul Cheng, Young Soo Yuk, Ronny Yongho Kim, Jin Sam KwakAbstract:As one of the candidate fourth-generation mobile communication systems, the IEEE 802.16 m-based WiMAX 2.0 system is required to provide up to 1 Gb/s peak transmission rate. The most efficient solution to achieve this challenging objective is to utilize wider channel bandwidth. Multicarrier is the technology to utilize wider bandwidth for parallel data transmission across multiple RF carriers, which is well agreed as one of the key technologies to satisfy ITU-R IMTAdvanced requirements. As the evolution of the IEEE 802.16 e-based WiMAX 1.0 system, IEEE 802.16 m specifies physical and MAC layers to enable multicarrier technology for the WiMAX 2.0 system. This can lead to more than 1 Gb/s peak transmission rate for low-mobility users and 100 Mb/s peak transmission rate for high-mobility users. By having the protocol structure with a common MAC entity to control transmission by multiple physical-layer connections over different RF carriers, the network operator can aggregate either Contiguous or non-Contiguous Spectrum resources with higher deployment flexibility, user throughput, and Spectrum efficiency. This article provides an overview of the multicarrier technology supported by the IEEE 802.16 m draft standard1 for WiMAX 2.0 system, including not only the general operation principle but also some details of physical layer and MAC layer support.
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Multicarrier technology for 4G WiMax system [WiMAX/LTE Update]
IEEE Communications Magazine, 2010Co-Authors: Yihshen Chen, Paul Cheng, Young Soo Yuk, Ronny Yongho Kim, Jin Sam KwakAbstract:As one of the candidate fourth-generation mobile communication systems, the IEEE 802.16 m-based WiMAX 2.0 system is required to provide up to 1 Gb/s peak transmission rate. The most efficient solution to achieve this challenging objective is to utilize wider channel bandwidth. Multicarrier is the technology to utilize wider bandwidth for parallel data transmission across multiple RF carriers, which is well agreed as one of the key technologies to satisfy ITU-R IMTAdvanced requirements. As the evolution of the IEEE 802.16 e-based WiMAX 1.0 system, IEEE 802.16 m specifies physical and MAC layers to enable multicarrier technology for the WiMAX 2.0 system. This can lead to more than 1 Gb/s peak transmission rate for low-mobility users and 100 Mb/s peak transmission rate for high-mobility users. By having the protocol structure with a common MAC entity to control transmission by multiple physical-layer connections over different RF carriers, the network operator can aggregate either Contiguous or non-Contiguous Spectrum resources with higher deployment flexibility, user throughput, and Spectrum efficiency. This article provides an overview of the multicarrier technology supported by the IEEE 802.16 m draft standard1 for WiMAX 2.0 system, including not only the general operation principle but also some details of physical layer and MAC layer support.
Tao Wang - One of the best experts on this subject based on the ideXlab platform.
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vsmc mimo a spectral efficient scheme for cooperative relay in cognitive radio networks
International Conference on Computer Communications, 2015Co-Authors: Chao Kong, Zengwen Yuan, Xushen Han, Feng Yang, Xinbing Wang, Tao WangAbstract:Multiple-Input Multiple-Output (MIMO) technology has become an efficient way to improve the capacity and reliability of wireless networks. Traditional MIMO schemes are designed mainly for the scenario of Contiguous Spectrum ranges. However, in cognitive radio networks, the available Spectrum is disContiguous, making traditional MIMO schemes inefficient for Spectrum usage. This motivates the design of new MIMO schemes that apply to networks with disContiguous Spectrum ranges. In this paper, we propose a scheme called VSMC MIMO, which enables MIMO nodes to transmit variable numbers of streams in multiple discontinuous Spectrum ranges. This scheme can largely improve the Spectrum utilization and meanwhile maintain the same spatial multiplexing and diversity gains as traditional MIMO schemes. To implement this spectral-efficient scheme on cooperative MIMO relays in cognitive radio networks, we propose a joint relay selection and Spectrum allocation algorithm and a corresponding MAC protocol for the system. We also build a testbed by the Universal Software Radio Peripherals (USRPs) to evaluate the performances of the proposed scheme in practical networks. The experimental results show that VSMC MIMO can efficiently utilize the disContiguous Spectrum and greatly improve the throughput of cognitive radio networks.
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INFOCOM - VSMC MIMO: A spectral efficient scheme for cooperative relay in cognitive radio networks
2015 IEEE Conference on Computer Communications (INFOCOM), 2015Co-Authors: Chao Kong, Zengwen Yuan, Xushen Han, Feng Yang, Xinbing Wang, Tao WangAbstract:Multiple-Input Multiple-Output (MIMO) technology has become an efficient way to improve the capacity and reliability of wireless networks. Traditional MIMO schemes are designed mainly for the scenario of Contiguous Spectrum ranges. However, in cognitive radio networks, the available Spectrum is disContiguous, making traditional MIMO schemes inefficient for Spectrum usage. This motivates the design of new MIMO schemes that apply to networks with disContiguous Spectrum ranges. In this paper, we propose a scheme called VSMC MIMO, which enables MIMO nodes to transmit variable numbers of streams in multiple discontinuous Spectrum ranges. This scheme can largely improve the Spectrum utilization and meanwhile maintain the same spatial multiplexing and diversity gains as traditional MIMO schemes. To implement this spectral-efficient scheme on cooperative MIMO relays in cognitive radio networks, we propose a joint relay selection and Spectrum allocation algorithm and a corresponding MAC protocol for the system. We also build a testbed by the Universal Software Radio Peripherals (USRPs) to evaluate the performances of the proposed scheme in practical networks. The experimental results show that VSMC MIMO can efficiently utilize the disContiguous Spectrum and greatly improve the throughput of cognitive radio networks.