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公开(公告)号：US12101161B2
公开(公告)日：2024-09-24
申请号：US17790070
申请日：2021-09-13
发明人： Yuhua Su , Nan Zhao , Xiaowei Pang , Xu Jiang , Deyue Zou
摘要： The present invention provides a design method of a high energy efficiency Unmanned Aerial Vehicle (UAV) communication system assisted by an intelligent reflecting surface, and belongs to the technical field of UAV communication network energy efficiency optimization. A communication process comprises two transmission links, one link is directly sent from an information source to an information sink, and the other link is reflected and transmitted by an intelligent reflecting surface attached to a UAV. The two links exist simultaneously. Based on an idea of block iteration, an original problem is decomposed into three sub-problems, and a non-convex optimization problem is transformed into solvable concave-convex fractional program problems by a continuous convex approximation technique. The present invention provides a design method for joint optimization of a passive beamforming of the intelligent reflecting surface, an active beamforming of a base station and a flight trajectory of the UAV.
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公开(公告)号：US20240250744A1
公开(公告)日：2024-07-25
申请号：US18159640
申请日：2023-01-25
摘要： Methods, systems, and devices for wireless communications are described. Techniques described herein provide for passive beamforming for Wi-Fi. A first wireless device communicating in an active session via a first bandwidth with a second wireless device may use a passive beamforming technique to identify a transmission sector of the second wireless device and/or a receive sector for communications on a second bandwidth, while the first wireless device is in an inactive session state for the second bandwidth. The second wireless device may transmit beacons in the second bandwidth via directional transmission sectors while the first wireless device is in the inactive session state for the second bandwidth. The first wireless device may receive the beacons and may select a transmission sector based on the beacons. The first wireless device may indicate the selected transmission sector to the second wireless device. The first wireless device may select a receive sector based on the beacons.
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公开(公告)号：US20240250741A1
公开(公告)日：2024-07-25
申请号：US18157682
申请日：2023-01-20
申请人： Apple Inc.
发明人： Sharad Sambhwani , Boqiang Fan , Ankit Bhamri , Mithat C Dogan
IPC分类号： H04B7/145 , H04B7/0426
摘要： A communication system may include a base station (BS), user equipment (UE), and a set of reconfigurable intelligent surfaces (RIS's). The RIS's, the UE, and the BS may communicate using a control RAT and a data RAT. The BS may transmit downlink (DL) signals to the UE device via reflection off a DL RIS. The UE device may transmit uplink (UL) signals to the BS via reflection off a UL RIS. This may optimize wireless performance in situations where reflecting the UL and DL signals off the same RIS would limit performance under the current data RAT channel conditions. The BS and the UE device may use channel measurements of the control RAT at the RIS's to select the UL RIS and the DL RIS. This may significantly reduce overhead required to identify the UL and DL RIS's relative to scenarios where exhaustive beam training is used.
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公开(公告)号：US20240214847A1
公开(公告)日：2024-06-27
申请号：US18145806
申请日：2022-12-22
发明人： Ahmed ELSHAFIE , Yu ZHANG , Wanshi CHEN
IPC分类号： H04W24/10 , H04B7/145 , H04B17/318
CPC分类号： H04W24/10 , H04B7/145 , H04B17/318
摘要： In an aspect, a primary node receives a first request, originating from a network node, to report measurements collected for communication with the network node within an area. The primary node also receives the measurements from multiple UEs in the area. The primary node further reports measurement information collected from the multiple UEs within the area.
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公开(公告)号：US20240129018A1
公开(公告)日：2024-04-18
申请号：US18484889
申请日：2023-10-11
摘要： There is provided an apparatus including receiving, at a second node, a signal including contributions of at least one backscatter signal and at least one further signal, the at least one backscatter signal being transmitted by a respective at least one passive device in response to a first node transmitting a first signal to the at least one passive device; isolating the contribution of the at least one backscatter signal from the at least one further signal; and based on the contribution of the at least one backscatter signal, determining, by the second node, one or more parameters associated with the respective at least one passive device.
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公开(公告)号：US20240106520A1
公开(公告)日：2024-03-28
申请号：US17934886
申请日：2022-09-23
CPC分类号： H04B7/145 , H01Q1/50 , H01Q3/40 , H01Q19/06 , H01Q21/061
摘要： Aspects of the disclosure related to devices, wireless communication apparatuses, methods, and other aspects of passive multiple input multiple output. In some aspects, an apparatus is provided that includes a first radio frequency (RF) transmission line having a first terminated with a quarter wavelength grounded transmission line, and a first array of antennas including a plurality of antenna elements. The apparatus also includes a switch array including a corresponding switch for each antenna element of the plurality of antenna elements of the first array of antennas, to selectively connect each antenna element to the first RF transmission line, and path lengths selectable by the switches at half wavelength distances for passive transmission. The apparatus also includes or more lens elements configured to modify wireless inputs signals to the first array of antennas and to modify wireless output signals from the first array of antennas.
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公开(公告)号：US20230421241A1
公开(公告)日：2023-12-28
申请号：US18322950
申请日：2023-05-24
申请人： Apple Inc.
CPC分类号： H04B7/145 , H04B7/04013
摘要： A wireless access point (AP) may communicate with a user equipment (UE) device via reflection off a reflective device having an array of fixed or adjustable reflectors in different orientations. The AP may illuminate different portions of an area by pointing a signal beam to different reflectors and/or by controlling the reflective device to electrically rotate the reflectors. The AP may calibrate the position of the reflective device and may establish wireless communications with the UE device by performing a sweep of signal beams over the reflectors and/or by controlling the reflective device to sweep over different reflector orientations. The AP may track movement of the UE device over time. The AP may sweep the AP beam over a subset of the reflectors around an active reflector to maintain communications with the UE device even as the UE device moves over time.
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公开(公告)号：US20230208486A1
公开(公告)日：2023-06-29
申请号：US18000164
申请日：2021-04-12
发明人： Linglong DAI , Ruochen SU , Jingbo TAN , Mo HAO , Richard MACKENZIE
IPC分类号： H04B7/06 , H04B7/0456 , H04B7/145
CPC分类号： H04B7/0617 , H04B7/0456 , H04B7/0626 , H04B7/145
摘要： A reflective surface for directing wireless communications signals that includes a plurality of independently reconfigurable elements disposed irregularly on the surface is disclosed. A method of controlling a communication channel of a wireless communication system that includes the reflective surface having an irregular element arrangement is also disclosed.
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公开(公告)号：US20230187976A1
公开(公告)日：2023-06-15
申请号：US18108312
申请日：2023-02-10
申请人： Reach Power, Inc.
摘要： A system for wireless power networking, preferably including one or more nodes, such as transmit nodes, receive nodes, relay nodes, and/or hybrid nodes. The system may function to form a power network (e.g., mesh network) configured to transfer power wirelessly between nodes of the system. A method for wireless power networking, preferably including transmitting power, controlling relay nodes, and/or receiving power, and optionally including optimizing power network operation. The method is preferably performed at (e.g., by one or more nodes of) the system, but can additionally or alternatively be performed by any other suitable system(s).
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公开(公告)号：US20230114389A1
公开(公告)日：2023-04-13
申请号：US17798060
申请日：2020-02-06
IPC分类号： H04B7/145
摘要： A passive relay device (100) relays radio communication between the inside of a radio wave shielding structure (200) and the outside of the radio wave shielding the structure (200), and the device includes an internal antenna (10) which connects with the inside, an external antenna (20) which connects with the outside, and a connection part (30) which connects the internal antenna (10) and the external antenna (20).
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