The Experts below are selected from a list of 12198 Experts worldwide ranked by ideXlab platform
Ravishankar Mahadevappa - One of the best experts on this subject based on the ideXlab platform.
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detect and avoid an ultra wideband wimax Coexistence Mechanism topics in radio communications
IEEE Communications Magazine, 2007Co-Authors: Shridhar Mubaraq Mishra, Robert W. Brodersen, Stephan Ten Brink, Ravishankar MahadevappaAbstract:Cognitive radios have been advanced as a technology for the opportunistic use of underutilized spectrum wherein secondary devices sense the presence of the primary user and use the spectrum only if it is deemed empty. Spectral cognition of this form can also be used by regulators to facilitate the dynamic Coexistence of different service types. An example of this is the operation of ultra-wideband devices in WiMAX bands: UWB devices must detect and avoid WiMAX devices in certain regulatory domains. In this article we start by discussing various options for detection and avoidance. We then describe the obstacles faced in achieving robust detection and avoidance with an on-chip implementation of basic DAA functionality. Finally, we present measurement results for operation of a single UWB device with a WiMAX system. This interaction also highlights the problem of dealing with listen before speak primaries where secondary transmission could interfere by blocking the primary's access to the medium.
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Detect and Avoid: An Ultra-Wideband/WiMAX Coexistence Mechanism
2007Co-Authors: Shridhar Mubaraq Mishra, Robert W. Brodersen, Ravishankar MahadevappaAbstract:Cognitive radios have been advanced as a technology for the opportunistic use of underutilized spectrum wherein secondary devices sense the presence of the primary user and use the spectrum only if it is deemed empty. Spectral cognition of this form can also be used by regulators to facilitate the dynamic Coexistence of different service types. An example of this is the operation of ultra-wideband devices in WiMAX bands: UWB devices must detect and avoid WiMAX devices in certain regulatory domains. In this article we start by discussing various options for detection and avoidance. We then describe the obstacles faced in achieving robust detection and avoidance with an on-chip implementation of basic DAA functionality. Finally, we present measurement results for operation of a single UWB device with a WiMAX system. This interaction also highlights the problem of dealing with listen before speak primaries where secondary transmission could interfere by blocking the primary’s access to the medium. TOPICS IN RADIO COMMUNICATIONS
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detect and avoid an ultra wideband wimax Coexistence Mechanism
2007Co-Authors: Shridhar Mubaraq Mishra, Robert W. Brodersen, Ravishankar MahadevappaAbstract:Cognitive radios have been advanced as a technology for the opportunistic use of underutilized spectrum wherein secondary devices sense the presence of the primary user and use the spectrum only if it is deemed empty. Spectral cognition of this form can also be used by regulators to facilitate the dynamic Coexistence of different service types. An example of this is the operation of ultra-wideband devices in WiMAX bands: UWB devices must detect and avoid WiMAX devices in certain regulatory domains. In this article we start by discussing various options for detection and avoidance. We then describe the obstacles faced in achieving robust detection and avoidance with an on-chip implementation of basic DAA functionality. Finally, we present measurement results for operation of a single UWB device with a WiMAX system. This interaction also highlights the problem of dealing with listen before speak primaries where secondary transmission could interfere by blocking the primary’s access to the medium. TOPICS IN RADIO COMMUNICATIONS
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Detect and avoid: an ultra-wideband/WiMAX Coexistence Mechanism [Topics in Radio Communications]
IEEE Communications Magazine, 2007Co-Authors: Shridhar Mubaraq Mishra, Robert W. Brodersen, Stephan Ten Brink, Ravishankar MahadevappaAbstract:Cognitive radios have been advanced as a technology for the opportunistic use of underutilized spectrum wherein secondary devices sense the presence of the primary user and use the spectrum only if it is deemed empty. Spectral cognition of this form can also be used by regulators to facilitate the dynamic Coexistence of different service types. An example of this is the operation of ultra-wideband devices in WiMAX bands: UWB devices must detect and avoid WiMAX devices in certain regulatory domains. In this article we start by discussing various options for detection and avoidance. We then describe the obstacles faced in achieving robust detection and avoidance with an on-chip implementation of basic DAA functionality. Finally, we present measurement results for operation of a single UWB device with a WiMAX system. This interaction also highlights the problem of dealing with listen before speak primaries where secondary transmission could interfere by blocking the primary's access to the medium.
Shridhar Mubaraq Mishra - One of the best experts on this subject based on the ideXlab platform.
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detect and avoid an ultra wideband wimax Coexistence Mechanism topics in radio communications
IEEE Communications Magazine, 2007Co-Authors: Shridhar Mubaraq Mishra, Robert W. Brodersen, Stephan Ten Brink, Ravishankar MahadevappaAbstract:Cognitive radios have been advanced as a technology for the opportunistic use of underutilized spectrum wherein secondary devices sense the presence of the primary user and use the spectrum only if it is deemed empty. Spectral cognition of this form can also be used by regulators to facilitate the dynamic Coexistence of different service types. An example of this is the operation of ultra-wideband devices in WiMAX bands: UWB devices must detect and avoid WiMAX devices in certain regulatory domains. In this article we start by discussing various options for detection and avoidance. We then describe the obstacles faced in achieving robust detection and avoidance with an on-chip implementation of basic DAA functionality. Finally, we present measurement results for operation of a single UWB device with a WiMAX system. This interaction also highlights the problem of dealing with listen before speak primaries where secondary transmission could interfere by blocking the primary's access to the medium.
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Detect and Avoid: An Ultra-Wideband/WiMAX Coexistence Mechanism
2007Co-Authors: Shridhar Mubaraq Mishra, Robert W. Brodersen, Ravishankar MahadevappaAbstract:Cognitive radios have been advanced as a technology for the opportunistic use of underutilized spectrum wherein secondary devices sense the presence of the primary user and use the spectrum only if it is deemed empty. Spectral cognition of this form can also be used by regulators to facilitate the dynamic Coexistence of different service types. An example of this is the operation of ultra-wideband devices in WiMAX bands: UWB devices must detect and avoid WiMAX devices in certain regulatory domains. In this article we start by discussing various options for detection and avoidance. We then describe the obstacles faced in achieving robust detection and avoidance with an on-chip implementation of basic DAA functionality. Finally, we present measurement results for operation of a single UWB device with a WiMAX system. This interaction also highlights the problem of dealing with listen before speak primaries where secondary transmission could interfere by blocking the primary’s access to the medium. TOPICS IN RADIO COMMUNICATIONS
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detect and avoid an ultra wideband wimax Coexistence Mechanism
2007Co-Authors: Shridhar Mubaraq Mishra, Robert W. Brodersen, Ravishankar MahadevappaAbstract:Cognitive radios have been advanced as a technology for the opportunistic use of underutilized spectrum wherein secondary devices sense the presence of the primary user and use the spectrum only if it is deemed empty. Spectral cognition of this form can also be used by regulators to facilitate the dynamic Coexistence of different service types. An example of this is the operation of ultra-wideband devices in WiMAX bands: UWB devices must detect and avoid WiMAX devices in certain regulatory domains. In this article we start by discussing various options for detection and avoidance. We then describe the obstacles faced in achieving robust detection and avoidance with an on-chip implementation of basic DAA functionality. Finally, we present measurement results for operation of a single UWB device with a WiMAX system. This interaction also highlights the problem of dealing with listen before speak primaries where secondary transmission could interfere by blocking the primary’s access to the medium. TOPICS IN RADIO COMMUNICATIONS
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Detect and avoid: an ultra-wideband/WiMAX Coexistence Mechanism [Topics in Radio Communications]
IEEE Communications Magazine, 2007Co-Authors: Shridhar Mubaraq Mishra, Robert W. Brodersen, Stephan Ten Brink, Ravishankar MahadevappaAbstract:Cognitive radios have been advanced as a technology for the opportunistic use of underutilized spectrum wherein secondary devices sense the presence of the primary user and use the spectrum only if it is deemed empty. Spectral cognition of this form can also be used by regulators to facilitate the dynamic Coexistence of different service types. An example of this is the operation of ultra-wideband devices in WiMAX bands: UWB devices must detect and avoid WiMAX devices in certain regulatory domains. In this article we start by discussing various options for detection and avoidance. We then describe the obstacles faced in achieving robust detection and avoidance with an on-chip implementation of basic DAA functionality. Finally, we present measurement results for operation of a single UWB device with a WiMAX system. This interaction also highlights the problem of dealing with listen before speak primaries where secondary transmission could interfere by blocking the primary's access to the medium.
Robert W. Brodersen - One of the best experts on this subject based on the ideXlab platform.
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detect and avoid an ultra wideband wimax Coexistence Mechanism topics in radio communications
IEEE Communications Magazine, 2007Co-Authors: Shridhar Mubaraq Mishra, Robert W. Brodersen, Stephan Ten Brink, Ravishankar MahadevappaAbstract:Cognitive radios have been advanced as a technology for the opportunistic use of underutilized spectrum wherein secondary devices sense the presence of the primary user and use the spectrum only if it is deemed empty. Spectral cognition of this form can also be used by regulators to facilitate the dynamic Coexistence of different service types. An example of this is the operation of ultra-wideband devices in WiMAX bands: UWB devices must detect and avoid WiMAX devices in certain regulatory domains. In this article we start by discussing various options for detection and avoidance. We then describe the obstacles faced in achieving robust detection and avoidance with an on-chip implementation of basic DAA functionality. Finally, we present measurement results for operation of a single UWB device with a WiMAX system. This interaction also highlights the problem of dealing with listen before speak primaries where secondary transmission could interfere by blocking the primary's access to the medium.
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Detect and Avoid: An Ultra-Wideband/WiMAX Coexistence Mechanism
2007Co-Authors: Shridhar Mubaraq Mishra, Robert W. Brodersen, Ravishankar MahadevappaAbstract:Cognitive radios have been advanced as a technology for the opportunistic use of underutilized spectrum wherein secondary devices sense the presence of the primary user and use the spectrum only if it is deemed empty. Spectral cognition of this form can also be used by regulators to facilitate the dynamic Coexistence of different service types. An example of this is the operation of ultra-wideband devices in WiMAX bands: UWB devices must detect and avoid WiMAX devices in certain regulatory domains. In this article we start by discussing various options for detection and avoidance. We then describe the obstacles faced in achieving robust detection and avoidance with an on-chip implementation of basic DAA functionality. Finally, we present measurement results for operation of a single UWB device with a WiMAX system. This interaction also highlights the problem of dealing with listen before speak primaries where secondary transmission could interfere by blocking the primary’s access to the medium. TOPICS IN RADIO COMMUNICATIONS
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detect and avoid an ultra wideband wimax Coexistence Mechanism
2007Co-Authors: Shridhar Mubaraq Mishra, Robert W. Brodersen, Ravishankar MahadevappaAbstract:Cognitive radios have been advanced as a technology for the opportunistic use of underutilized spectrum wherein secondary devices sense the presence of the primary user and use the spectrum only if it is deemed empty. Spectral cognition of this form can also be used by regulators to facilitate the dynamic Coexistence of different service types. An example of this is the operation of ultra-wideband devices in WiMAX bands: UWB devices must detect and avoid WiMAX devices in certain regulatory domains. In this article we start by discussing various options for detection and avoidance. We then describe the obstacles faced in achieving robust detection and avoidance with an on-chip implementation of basic DAA functionality. Finally, we present measurement results for operation of a single UWB device with a WiMAX system. This interaction also highlights the problem of dealing with listen before speak primaries where secondary transmission could interfere by blocking the primary’s access to the medium. TOPICS IN RADIO COMMUNICATIONS
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Detect and avoid: an ultra-wideband/WiMAX Coexistence Mechanism [Topics in Radio Communications]
IEEE Communications Magazine, 2007Co-Authors: Shridhar Mubaraq Mishra, Robert W. Brodersen, Stephan Ten Brink, Ravishankar MahadevappaAbstract:Cognitive radios have been advanced as a technology for the opportunistic use of underutilized spectrum wherein secondary devices sense the presence of the primary user and use the spectrum only if it is deemed empty. Spectral cognition of this form can also be used by regulators to facilitate the dynamic Coexistence of different service types. An example of this is the operation of ultra-wideband devices in WiMAX bands: UWB devices must detect and avoid WiMAX devices in certain regulatory domains. In this article we start by discussing various options for detection and avoidance. We then describe the obstacles faced in achieving robust detection and avoidance with an on-chip implementation of basic DAA functionality. Finally, we present measurement results for operation of a single UWB device with a WiMAX system. This interaction also highlights the problem of dealing with listen before speak primaries where secondary transmission could interfere by blocking the primary's access to the medium.
Choong Seon Hong - One of the best experts on this subject based on the ideXlab platform.
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Coexistence Mechanism between eMBB and uRLLC in 5G Wireless Networks.
arXiv: Networking and Internet Architecture, 2020Co-Authors: Anupam Kumar Bairagi, Madyan Alsenwi, Nguyen H. Tran, Shirajum Munir, Zhu Han, Alshamrani, Mehedi Masud, Choong Seon HongAbstract:uRLLC and eMBB are two influential services of the emerging 5G cellular network. Latency and reliability are major concerns for uRLLC applications, whereas eMBB services claim for the maximum data rates. Owing to the trade-off among latency, reliability and spectral efficiency, sharing of radio resources between eMBB and uRLLC services, heads to a challenging scheduling dilemma. In this paper, we study the co-scheduling problem of eMBB and uRLLC traffic based upon the puncturing technique. Precisely, we formulate an optimization problem aiming to maximize the MEAR of eMBB UEs while fulfilling the provisions of the uRLLC traffic. We decompose the original problem into two sub-problems, namely scheduling problem of eMBB UEs and uRLLC UEs while prevailing objective unchanged. Radio resources are scheduled among the eMBB UEs on a time slot basis, whereas it is handled for uRLLC UEs on a mini-slot basis. Moreover, for resolving the scheduling issue of eMBB UEs, we use PSUM based algorithm, whereas the optimal TM is adopted for solving the same problem of uRLLC UEs. Furthermore, a heuristic algorithm is also provided to solve the first sub-problem with lower complexity. Finally, the significance of the proposed approach over other baseline approaches is established through numerical analysis in terms of the MEAR and fairness scores of the eMBB UEs.
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a hopfield neural networks based Mechanism for Coexistence of lte u and wifi networks in unlicensed spectrum
Asia-Pacific Network Operations and Management Symposium, 2019Co-Authors: Madyan Alsenwi, Yan Kyaw Tun, Shashi Raj Pandey, Choong Seon HongAbstract:Long-Term Evolution in the unlicensed spectrum (LTE-U) is considered as an indispensable technique to mitigate the spectrum scarcity in wireless networks. Typical LTE transmissions are contention-free and centrally controlled by the base station (BS); however, the wireless networks that work in unlicensed bands use contention-based protocols for channel access, which raises the need to derive an efficient and fair Coexistence Mechanism among different radio access networks. In this work, we propose a novel neural networks (NNs) based Mechanism for the Coexistence of an LTE-U base station (BS) in the unlicensed spectrum alongside with a WiFi access point (WAP). Specifically, we model the Coexistence problem as a Hopfield Neural Network (HNN) based optimization problem that aims a fair Coexistence considering both the LTE-U data rate and the QoS requirements of the WiFi network. Using the energy function of HNN, precise investigation of its minimization property can directly provide the solution of the optimization problem. Numerical results show that the proposed Mechanism allows the LTE-U BS to work efficiently in the unlicensed spectrum while protecting the WiFi network.
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a matching based Coexistence Mechanism between embb and urllc in 5g wireless networks
ACM Symposium on Applied Computing, 2019Co-Authors: Anupam Kumar Bairagi, Madyan Alsenwi, Md Shirajum Munir, Nguyen H. Tran, Choong Seon HongAbstract:Ultra-reliable low-latency communication (uRLLC) and enhanced mobile broadband (eMBB) are two major service classes in the emerging 5G mobile network. uRLLC applications demand a stringent latency and reliability whereas eMBB services necessitate utmost data rates. The Coexistence of uRLLC and eMBB services on the same radio resource leads to a challenging scheduling problem because of the trade-off among latency, reliability and spectral efficiency. In this paper, a puncturing scheme based Coexistence approach between uRLLC and eMBB traffic is proposed for the upcoming 5G mobile networks. Specifically, an optimization problem is formulated with the objective of maximizing the minimum expected achieved rate of eMBB users in the long run basis while meeting the uRLLC requirements. To solve this co-scheduling optimization problem, we decomposed it into two sub-problems with the same objective of the original problem: 1) resource allocation problem for eMBB users, and 2) resource allocation problem for uRLLC users. A heuristic algorithm is used for solving the first sub-problem, whereas the one-sided matching game is used for solving the second. Simulation results show the advantages of the proposed approach over other baseline methods in terms of the minimum achieved rate and fairness among the eMBB users.
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SAC - A matching based Coexistence Mechanism between eMBB and uRLLC in 5G wireless networks
Proceedings of the 34th ACM SIGAPP Symposium on Applied Computing - SAC '19, 2019Co-Authors: Anupam Kumar Bairagi, Madyan Alsenwi, Nguyen H. Tran, Shirajum Munir, Choong Seon HongAbstract:Ultra-reliable low-latency communication (uRLLC) and enhanced mobile broadband (eMBB) are two major service classes in the emerging 5G mobile network. uRLLC applications demand a stringent latency and reliability whereas eMBB services necessitate utmost data rates. The Coexistence of uRLLC and eMBB services on the same radio resource leads to a challenging scheduling problem because of the trade-off among latency, reliability and spectral efficiency. In this paper, a puncturing scheme based Coexistence approach between uRLLC and eMBB traffic is proposed for the upcoming 5G mobile networks. Specifically, an optimization problem is formulated with the objective of maximizing the minimum expected achieved rate of eMBB users in the long run basis while meeting the uRLLC requirements. To solve this co-scheduling optimization problem, we decomposed it into two sub-problems with the same objective of the original problem: 1) resource allocation problem for eMBB users, and 2) resource allocation problem for uRLLC users. A heuristic algorithm is used for solving the first sub-problem, whereas the one-sided matching game is used for solving the second. Simulation results show the advantages of the proposed approach over other baseline methods in terms of the minimum achieved rate and fairness among the eMBB users.
Stephan Ten Brink - One of the best experts on this subject based on the ideXlab platform.
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detect and avoid an ultra wideband wimax Coexistence Mechanism topics in radio communications
IEEE Communications Magazine, 2007Co-Authors: Shridhar Mubaraq Mishra, Robert W. Brodersen, Stephan Ten Brink, Ravishankar MahadevappaAbstract:Cognitive radios have been advanced as a technology for the opportunistic use of underutilized spectrum wherein secondary devices sense the presence of the primary user and use the spectrum only if it is deemed empty. Spectral cognition of this form can also be used by regulators to facilitate the dynamic Coexistence of different service types. An example of this is the operation of ultra-wideband devices in WiMAX bands: UWB devices must detect and avoid WiMAX devices in certain regulatory domains. In this article we start by discussing various options for detection and avoidance. We then describe the obstacles faced in achieving robust detection and avoidance with an on-chip implementation of basic DAA functionality. Finally, we present measurement results for operation of a single UWB device with a WiMAX system. This interaction also highlights the problem of dealing with listen before speak primaries where secondary transmission could interfere by blocking the primary's access to the medium.
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Detect and avoid: an ultra-wideband/WiMAX Coexistence Mechanism [Topics in Radio Communications]
IEEE Communications Magazine, 2007Co-Authors: Shridhar Mubaraq Mishra, Robert W. Brodersen, Stephan Ten Brink, Ravishankar MahadevappaAbstract:Cognitive radios have been advanced as a technology for the opportunistic use of underutilized spectrum wherein secondary devices sense the presence of the primary user and use the spectrum only if it is deemed empty. Spectral cognition of this form can also be used by regulators to facilitate the dynamic Coexistence of different service types. An example of this is the operation of ultra-wideband devices in WiMAX bands: UWB devices must detect and avoid WiMAX devices in certain regulatory domains. In this article we start by discussing various options for detection and avoidance. We then describe the obstacles faced in achieving robust detection and avoidance with an on-chip implementation of basic DAA functionality. Finally, we present measurement results for operation of a single UWB device with a WiMAX system. This interaction also highlights the problem of dealing with listen before speak primaries where secondary transmission could interfere by blocking the primary's access to the medium.