The Experts below are selected from a list of 2235 Experts worldwide ranked by ideXlab platform
Thanvir Mohamed - One of the best experts on this subject based on the ideXlab platform.
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MobiCom - FSONet: A Wireless Backhaul for Multi-Gigabit Picocells Using Steerable Free Space Optics
Proceedings of the 23rd Annual International Conference on Mobile Computing and Networking, 2017Co-Authors: Max Curran, Shaifur Rahman, Himanshu Gupta, Kai Zheng, Jon P. Longtin, Samir R. Das, Thanvir MohamedAbstract:Expected increase in cellular demand has pushed recent interest in picocell networks which have reduced cell sizes (100-200m or less). For ease of deployment of such networks, a wireless backhaul network is highly desired. Since RF-based technologies are unlikely to provide the desired multi-gigabit data rates, we motivate and explore use of free space optics (FSO) for picocell backhaul. In particular, we present a novel network architecture based on steerable links and sufficiently many robust short-range links, to help circumvent the key challenge of outdoor effects in reliable operation of outdoor FSO links. Our architecture is motivated by the fact that, due to the high density of Picocells, many short-range links will occur naturally in a picocell backhaul. Moreover, use of steerable FSO links facilitates networks with sufficient redundancy while using only a small number of interfaces per node. We address the key problems that arise in the context of such a backhaul architecture, viz., an FSO link design with desired characteristics, and related network design and management problems. We develop and evaluate a robust 100m FSO link prototype, and simulate the proposed architecture in many metro US cities while show its viability via evaluation of key performance metrics.
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fsonet a wireless backhaul for multi gigabit Picocells using steerable free space optics
ACM IEEE International Conference on Mobile Computing and Networking, 2017Co-Authors: Max Curran, Himanshu Gupta, Kai Zheng, Jon P. Longtin, Samir R. Das, Md Shaifur Rahman, Thanvir MohamedAbstract:Expected increase in cellular demand has pushed recent interest in picocell networks which have reduced cell sizes (100-200m or less). For ease of deployment of such networks, a wireless backhaul network is highly desired. Since RF-based technologies are unlikely to provide the desired multi-gigabit data rates, we motivate and explore use of free space optics (FSO) for picocell backhaul. In particular, we present a novel network architecture based on steerable links and sufficiently many robust short-range links, to help circumvent the key challenge of outdoor effects in reliable operation of outdoor FSO links. Our architecture is motivated by the fact that, due to the high density of Picocells, many short-range links will occur naturally in a picocell backhaul. Moreover, use of steerable FSO links facilitates networks with sufficient redundancy while using only a small number of interfaces per node. We address the key problems that arise in the context of such a backhaul architecture, viz., an FSO link design with desired characteristics, and related network design and management problems. We develop and evaluate a robust 100m FSO link prototype, and simulate the proposed architecture in many metro US cities while show its viability via evaluation of key performance metrics.
E.s. Sousa - One of the best experts on this subject based on the ideXlab platform.
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a cdma mixed cellular architecture with space division duplex sdd for symmetric asymmetric wireless communications
Wireless Communications and Networking Conference, 1999Co-Authors: W.w.s. Wong, E.s. SousaAbstract:We explore the use of a novel duplex scheme-space division duplex (SDD) in a CDMA mixed cellular architecture for supporting symmetric data services and asymmetric data services with the former served by FDD regular cells and the latter served by SDD Picocells (System I). Using per-cell capacity as our measure, the performance of System I is evaluated and compared with two other approaches (System II and III) in which System II utilizes FDD in both regular cells and Picocells and System III simply utilizes FDD in a regular cellular architecture to serve both symmetric and asymmetric data users.
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WCNC - A CDMA mixed cellular architecture with space division duplex (SDD) for symmetric/asymmetric wireless communications
WCNC. 1999 IEEE Wireless Communications and Networking Conference (Cat. No.99TH8466), 1Co-Authors: W.w.s. Wong, E.s. SousaAbstract:We explore the use of a novel duplex scheme-space division duplex (SDD) in a CDMA mixed cellular architecture for supporting symmetric data services and asymmetric data services with the former served by FDD regular cells and the latter served by SDD Picocells (System I). Using per-cell capacity as our measure, the performance of System I is evaluated and compared with two other approaches (System II and III) in which System II utilizes FDD in both regular cells and Picocells and System III simply utilizes FDD in a regular cellular architecture to serve both symmetric and asymmetric data users.
Haitao Zheng - One of the best experts on this subject based on the ideXlab platform.
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Interference analysis for mm-wave Picocells
2015 IEEE Global Communications Conference GLOBECOM 2015, 2015Co-Authors: Zhinus Marzi, Upamanyu Madhow, Haitao ZhengAbstract:Millimeter (mm) wave picocellular networks are a promising approach for delivering the 1000-fold capacity increase required to keep up with projected demand for wireless data: the available bandwidth is orders of magnitude larger than that in existing cellular systems, and the small carrier wavelength enables the realization of highly directive antenna arrays in compact form factor, thus drastically increasing spatial reuse. In this paper, we carry out an interference analysis for mm wave Picocells in an urban canyon, accounting for the geometry associated with the sparse multipath characteristic of this band. While we make some modeling simplifications, our analysis provides a strong indication of the very large capacity, of the order of Terabits/sec per km, provided by such networks, using system bandwidths of the order of a few GHz.
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GLOBECOM - Interference Analysis for mm-Wave Picocells
2015 IEEE Global Communications Conference (GLOBECOM), 2015Co-Authors: Zhinus Marzi, Upamanyu Madhow, Haitao ZhengAbstract:Millimeter (mm) wave picocellular networks are a promising approach for delivering the 1000-fold capacity increase required to keep up with projected demand for wireless data: the available bandwidth is orders of magnitude larger than that in existing cellular systems, and the small carrier wavelength enables the realization of highly directive antenna arrays in compact form factor, thus drastically increasing spatial reuse. In this paper, we carry out an interference analysis for mm wave Picocells in an urban canyon, accounting for the geometry associated with the sparse multipath characteristic of this band. While we make some modeling simplifications, our analysis provides a strong indication of the very large capacity, of the order of {\it Terabits/sec per km,} provided by such networks, using system bandwidths of the order of a few GHz.
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demystifying 60ghz outdoor Picocells
ACM IEEE International Conference on Mobile Computing and Networking, 2014Co-Authors: Yibo Zhu, Zhinus Marzi, Upamanyu Madhow, Zengbin Zhang, Chris Nelson, Ben Y Zhao, Haitao ZhengAbstract:Mobile network traffic is set to explode in our near future, driven by the growth of bandwidth-hungry media applications. Current capacity solutions, including buying spectrum, WiFi offloading, and LTE Picocells, are unlikely to supply the orders-of-magnitude bandwidth increase we need. In this paper, we explore a dramatically different alternative in the form of 60GHz mmwave Picocells with highly directional links. While industry is investigating other mmwave bands (e.g. 28GHz to avoid oxygen absorption), we prefer the unlicensed 60GHz band with highly directional, short-range links (~100m). 60GHz links truly reap the spatial reuse benefits of small cells while delivering high per-user data rates and leveraging efforts on indoor 60GHz PHY technology and standards. Using extensive measurements on off-the-shelf 60GHz radios and system-level simulations, we explore the feasibility of 60GHz Picocells by characterizing range, attenuation due to reflections, sensitivity to movement and blockage, and interference in typical urban environments. Our results dispel some common myths, and show that there are no fundamental physical barriers to high-capacity 60GHz outdoor Picocells. We conclude by identifying open challenges and associated research opportunities.
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MobiCom - Demystifying 60GHz outdoor Picocells
Proceedings of the 20th annual international conference on Mobile computing and networking, 2014Co-Authors: Yibo Zhu, Zhinus Marzi, Upamanyu Madhow, Zengbin Zhang, Chris Nelson, Ben Y Zhao, Haitao ZhengAbstract:Mobile network traffic is set to explode in our near future, driven by the growth of bandwidth-hungry media applications. Current capacity solutions, including buying spectrum, WiFi offloading, and LTE Picocells, are unlikely to supply the orders-of-magnitude bandwidth increase we need. In this paper, we explore a dramatically different alternative in the form of 60GHz mmwave Picocells with highly directional links. While industry is investigating other mmwave bands (e.g. 28GHz to avoid oxygen absorption), we prefer the unlicensed 60GHz band with highly directional, short-range links (~100m). 60GHz links truly reap the spatial reuse benefits of small cells while delivering high per-user data rates and leveraging efforts on indoor 60GHz PHY technology and standards. Using extensive measurements on off-the-shelf 60GHz radios and system-level simulations, we explore the feasibility of 60GHz Picocells by characterizing range, attenuation due to reflections, sensitivity to movement and blockage, and interference in typical urban environments. Our results dispel some common myths, and show that there are no fundamental physical barriers to high-capacity 60GHz outdoor Picocells. We conclude by identifying open challenges and associated research opportunities.
Max Curran - One of the best experts on this subject based on the ideXlab platform.
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MobiCom - FSONet: A Wireless Backhaul for Multi-Gigabit Picocells Using Steerable Free Space Optics
Proceedings of the 23rd Annual International Conference on Mobile Computing and Networking, 2017Co-Authors: Max Curran, Shaifur Rahman, Himanshu Gupta, Kai Zheng, Jon P. Longtin, Samir R. Das, Thanvir MohamedAbstract:Expected increase in cellular demand has pushed recent interest in picocell networks which have reduced cell sizes (100-200m or less). For ease of deployment of such networks, a wireless backhaul network is highly desired. Since RF-based technologies are unlikely to provide the desired multi-gigabit data rates, we motivate and explore use of free space optics (FSO) for picocell backhaul. In particular, we present a novel network architecture based on steerable links and sufficiently many robust short-range links, to help circumvent the key challenge of outdoor effects in reliable operation of outdoor FSO links. Our architecture is motivated by the fact that, due to the high density of Picocells, many short-range links will occur naturally in a picocell backhaul. Moreover, use of steerable FSO links facilitates networks with sufficient redundancy while using only a small number of interfaces per node. We address the key problems that arise in the context of such a backhaul architecture, viz., an FSO link design with desired characteristics, and related network design and management problems. We develop and evaluate a robust 100m FSO link prototype, and simulate the proposed architecture in many metro US cities while show its viability via evaluation of key performance metrics.
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fsonet a wireless backhaul for multi gigabit Picocells using steerable free space optics
ACM IEEE International Conference on Mobile Computing and Networking, 2017Co-Authors: Max Curran, Himanshu Gupta, Kai Zheng, Jon P. Longtin, Samir R. Das, Md Shaifur Rahman, Thanvir MohamedAbstract:Expected increase in cellular demand has pushed recent interest in picocell networks which have reduced cell sizes (100-200m or less). For ease of deployment of such networks, a wireless backhaul network is highly desired. Since RF-based technologies are unlikely to provide the desired multi-gigabit data rates, we motivate and explore use of free space optics (FSO) for picocell backhaul. In particular, we present a novel network architecture based on steerable links and sufficiently many robust short-range links, to help circumvent the key challenge of outdoor effects in reliable operation of outdoor FSO links. Our architecture is motivated by the fact that, due to the high density of Picocells, many short-range links will occur naturally in a picocell backhaul. Moreover, use of steerable FSO links facilitates networks with sufficient redundancy while using only a small number of interfaces per node. We address the key problems that arise in the context of such a backhaul architecture, viz., an FSO link design with desired characteristics, and related network design and management problems. We develop and evaluate a robust 100m FSO link prototype, and simulate the proposed architecture in many metro US cities while show its viability via evaluation of key performance metrics.
W.w.s. Wong - One of the best experts on this subject based on the ideXlab platform.
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a cdma mixed cellular architecture with space division duplex sdd for symmetric asymmetric wireless communications
Wireless Communications and Networking Conference, 1999Co-Authors: W.w.s. Wong, E.s. SousaAbstract:We explore the use of a novel duplex scheme-space division duplex (SDD) in a CDMA mixed cellular architecture for supporting symmetric data services and asymmetric data services with the former served by FDD regular cells and the latter served by SDD Picocells (System I). Using per-cell capacity as our measure, the performance of System I is evaluated and compared with two other approaches (System II and III) in which System II utilizes FDD in both regular cells and Picocells and System III simply utilizes FDD in a regular cellular architecture to serve both symmetric and asymmetric data users.
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WCNC - A CDMA mixed cellular architecture with space division duplex (SDD) for symmetric/asymmetric wireless communications
WCNC. 1999 IEEE Wireless Communications and Networking Conference (Cat. No.99TH8466), 1Co-Authors: W.w.s. Wong, E.s. SousaAbstract:We explore the use of a novel duplex scheme-space division duplex (SDD) in a CDMA mixed cellular architecture for supporting symmetric data services and asymmetric data services with the former served by FDD regular cells and the latter served by SDD Picocells (System I). Using per-cell capacity as our measure, the performance of System I is evaluated and compared with two other approaches (System II and III) in which System II utilizes FDD in both regular cells and Picocells and System III simply utilizes FDD in a regular cellular architecture to serve both symmetric and asymmetric data users.