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公开(公告)号：US20190014526A1
公开(公告)日：2019-01-10
申请号：US16073052
申请日：2017-02-08
Inventor： Ahmed BADER , Mohamed-Slim ALOUINI
Abstract: Embodiments of the present disclosure provide techniques for packet routing. In an embodiment, when a transmitting communication device injects a packet into a communication network, a receiving communication device that is closer to a sink or destination than the transmitting communication device relays the packet in a first hop. In a subsequent hop, a receiving communication device evaluates position information conveyed by the transmitting communication device of the first hop to determine whether to forward the packet. Accordingly, a receiving communication device receiver that offers progress towards the sink can elect to forward the packet.
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Patent Agency Ranking
公开(公告)号：US20230314731A1
公开(公告)日：2023-10-05
申请号：US18022773
申请日：2021-09-10
Inventor： Boon S. OOI , Omar ALKHAZRAGI , Abderrahmen TRICHILI , Islam ASHRY , Tien Khee NG , Mohamed-Slim ALOUINI
CPC classification number: G02B6/4203 , H04B10/11
Abstract: A compounded light-focusing optical element is configured to focus light, and the compounded light-focusing optical element includes a body having a first, flat, end face and a second, curved end face, the second, curved end face being opposite to the first, flat end face, and plural optical fibers extending through the body, from the first, flat end face to the second, curved end face. The plural optical fibers are fused to each other to form the body, and end faces of the plural optical fibers, corresponding to the second, curved end face, are pointing in different directions.
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公开(公告)号：US20220006532A1
公开(公告)日：2022-01-06
申请号：US17357450
申请日：2021-06-24
Inventor： Ahmed Mohamed ELZANATY , Mohamed-Slim ALOUINI
IPC: H04B10/524 , H04B10/11 , H04B10/50 , H04B10/40
Abstract: A method for optical communication between first and second transceivers over a channel in a free-space medium involves receiving a binary string of uniformly distributed bits and converting them into probabilistically-shaped unipolar M-pulse amplitude modulated (M-PAM) symbols using distribution matching. The probabilistically-shaped unipolar M-PAM symbols are mapped into a binary bit stream, which are used to generate, at a forward error correction rate, parity bits. The parity bits are mapped to uniformly-distributed unipolar M-PAM parity symbols. The probabilistically-shaped unipolar M-PAM symbols and the uniformly-distributed unipolar M-PAM parity symbols are multiplexed to form a codeword that is used to modulate the intensity of a laser so as to transmit the codeword.
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公开(公告)号：US20190141662A1
公开(公告)日：2019-05-09
申请号：US16145907
申请日：2018-09-28
Applicant: Massachusetts Institute of Technology , King Abdullah University of Science and Technology
Inventor： Moe Z. WIN , Hesham EISAWY , Wenhan Dai , Mohamed-Slim ALOUINI
Abstract: An approach to localizing a mobile device takes advantage of the device reporting the order of its neighboring base stations (BSs) according to the received power of the pilot signals. Based on the received BS order, the agent is located within the intersection of corresponding higher-order Voronoi cells. Assuming that the BSs are deployed according to a Poisson point process (PPP) and that signals are subject to log-normal shadowing, the tradeoff between the ALR and the localization error probability can be characterized. It is shown that increasing the number of reported BSs generally reduces the ALR and improves the localization accuracy at the expense of increasing the localization error.
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公开(公告)号：US20180227188A1
公开(公告)日：2018-08-09
申请号：US15747554
申请日：2016-08-18
Inventor： Mohamed-Slim ALOUINI , Ahmed DOUIK , Salah A. ALY AHMED , Tareq Y. AL-NAFFOURI
IPC: H04L12/24
Abstract: Various examples are provided for node estimation and topology discovery for networks. In one example, a method includes receiving a packet having an identifier from a first node; adding the identifier to another transmission packet based on a comparison between the first identifier and existing identifiers associated with the other packet; adjusting a transmit probability based on the comparison; and transmitting the other packet based on a comparison between the transmit probability and a probability distribution. In another example, a system includes a network device that can adds an identifier received in a packet to a list including existing identifiers and adjust a transmit probability based on a comparison between the identifiers; and transmit another packet based on a comparison between the transmit probability and a probability distribution. In another example, a method includes determining a quantity of sensor devices based on a plurality of identifiers received in a packet.
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公开(公告)号：US20180198203A1
公开(公告)日：2018-07-12
申请号：US15738261
申请日：2016-08-11
Inventor： Ahmed BADER , Mohamed-Slim ALOUINI
CPC classification number: H01Q3/28 , H01Q3/26 , H04B7/0617 , H04W16/28 , H04W84/18
Abstract: An embodiment of a non-invasive beamforming add-on apparatus couples to an existing antenna port and rectifies the beam azimuth in the upstream and downstream directions. The apparatus comprises input circuitry that is configured to receive one or more signals from a neighboring node of the linear wireless sensor network; first amplifier circuitry configured to adjust an amplitude of a respective received signal in accordance with a weighting coefficient and invoke a desired phase to a carrier frequency of the received signal thereby forming a first amplified signal; and second amplifier circuitry configured to adjust a gain of the first amplified signal towards upstream and downstream neighbors of the linear wireless sensor in the linear wireless sensor network.
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