19 results about "Direct path" patented technology

Techniques are described herein for providing bi-directional path selection based on indicated path preferences in policy data. Such techniques may be performed by a network node and may comprise generating a set of paths to a destination, a first path of the set of paths being labeled as a direct path and a second path of the set of paths being labeled as an indirect path. Such techniques may subsequently comprise receiving a communication from a source and directed to the destination, determining, based on a first indicated path preference for the destination and a second indicated path preference for the source, a path category, selecting a forwarding path as one of the first path or the second path based on the determined path category, and routing the communication to a next hop in the selected forwarding path.

A communication method and apparatus are disclosed, applicable to the field of communication technology. In this method, a first apparatus determines the time delay from when the first network device sends the first reference signal to when the terminal device receives the first reference signal, and the time delay from when the terminal device sends the second reference signal to when the first network device receives the second reference signal, based on a phase measurement obtained from a first reference signal received by a terminal device from a first network device, a phase error obtained from the direct path signals corresponding to the first signal sent and received by the terminal device, a phase measurement obtained from a second reference signal received by the first network device from the terminal device, and the phase error obtained from the direct path signals corresponding to the second signal sent and received by the first network device. Using the time delays determined by this method to locate the terminal device improves positioning performance.

This invention discloses a flexible connection anti-tampering component, a dedicated housing, and an assembly method, belonging to the field of anti-theft and anti-tampering fastener technology. Addressing the industry shortcomings of existing flexible connector locking structures, which only employ exposed, simple combinations without dedicated protective structures, resulting in easy disassembly with tools and adhesive removers, concealable restoration after disassembly, and easy theft and substitution of goods leading to economic losses, this invention adopts the following technical solution: The component includes a first main body, a second main body, a limiting area, a locking and fixing part, an ejector part, and a flexible connector. The housing has a sized through-hole, and the limiting area fully covers the locking area formed by the flexible connector and the locking and fixing part. Utilizing the deformable characteristics of the flexible connector, the ejector part inside the housing pushes the flexible connector to form an irregular bend, completely blocking the direct path of tools from the housing opening to the locking area. A half-type rigid protective housing and standardized assembly process are provided, and a disposable anti-counterfeiting and anti-restore component is provided at the seam of the housing. This invention can be adapted into various forms such as through-and-through, single-through, and wrap-around, to meet the anti-theft binding needs of multiple scenarios. It has a simple structure and is easy to mass-produce.

The application provides a tour route planning method and device, belonging to the technical field of path planning, the method comprises the following steps: step 1: constructing a GIS map of a recreation place, marking the entrance, intersection and play point as a point with a unique identifier; step 2: connecting each point to generate a directed path, the directed path includes a one-way path and a two-way path; step 3: calculating the shortest path between any two points by using the Floyd algorithm to generate a shortest route set RS; step 4: receiving the starting point, ending point and traversal point set input by the user, and generating a planned route through the optimal path point bridging and correction algorithm. The tour route planning method and device provided by the application can quickly generate a tour route covering all specified points, with the shortest path, the least repetition and dynamic requirements.

The application provides a kind of air-ground channel modeling method suitable for millimeter wave phased array, comprising: step 1, establishing the Two-Ray channel geometric model of direct path and multiple reflection paths;Step 2, according to the geometric model, calculate the Rician factor;Step 3, according to the geometric model, determine the time delay of the reflection path;Step 4, according to the carrier frequency and the speed of motion, determine the Doppler frequency offset of the direct path;Step 5, according to the geometric model and Jacks distribution, determine the Doppler power spectrum of the reflection path;Step 6, based on the generalized stationary uncorrelated scattering model, establish the channel model. Through the application, a high-accuracy phased array air-ground channel model can be established, by considering the departure angle of the phased array transmitting antenna and the arrival angle of the receiving antenna in the air-ground channel model, the accuracy of the Rician factor calculation and the accuracy of the Doppler spread power spectrum in the fading channel can be improved.

This invention discloses a reinforcement learning-based method for optimizing the performance of FAS-assisted satellite-to-ground communication. In air-to-ground communication, when the direct path is blocked by obstacles, the signal is transmitted through a mixture of reflection from moving scatterers and the direct path. This invention describes the communication environment between the mobile transmitter and the ground user through geometric stochastic modeling, establishes a dynamic optimization framework based on FAS, couples satellite motion characteristics with adjustable FAS parameters to construct a three-dimensional channel model, designs an improved Memetic PPO reinforcement learning algorithm to dynamically optimize the FAS configuration set at the ground user in the discrete action space through a local search mechanism, and jointly optimizes channel capacity and modeling accuracy to generate the optimal strategy. This method reveals the nonlinear relationship between satellite motion and channel characteristics, significantly improves communication performance in complex obstruction environments, provides a new method for dynamic channel optimization of satellites, and has significant application value.

The application provides a method and device for transmitting data. The method comprises: determining, by an access network device, a plurality of paths for transmitting a first quality of service (QoS) flow of a terminal device, the plurality of paths comprising at least two paths in a first path set, the first path set comprising N indirect paths and a direct path between the access network device and the terminal device, wherein the N indirect paths comprise indirect paths between the access network device and the terminal device through N relay terminal devices, N is an integer greater than or equal to 1, and the access network device transmits the first QoS flow through the plurality of paths. The method and device for transmitting data provided by the application can enable the terminal device to communicate with the network device through the plurality of paths, thereby improving the reliability or rate of data transmission.

Methods are provided to support path selection for a remote UE configured with multipath in a UE-to-network relay. A direct path or an indirect path is set as the primary path. Side information of the indirect path is considered for path selection. A remote UE can select a suitable path by utilizing the side information for path selection to check whether an indirect path can fulfill the QoS requirement of arriving UL traffic. In a network-controlled path selection, the base station can request UE to send side information. The base station indicates the selected path or the change of primary path to the UE via explicit signaling. Each path is identified by a path ID. The path indication is in a granularity of per radio bearer, per QoS flow, per logical channel, or per logical channel group.

This application provides a multipath configuration method, apparatus, and system for providing a process for a remote UE to establish multiple paths from a single path. The method includes: a first terminal device receiving a first message from a network device through a first path; wherein the first message instructs the first terminal device to establish a second path between the first terminal device and the network device, the second path being different from the first path; the first terminal device using the first message to establish the second path in a second cell; and the first terminal device maintaining a Media Access Control (MAC) entity, the MAC entity being used for communication between the first terminal device and the network device through a direct path in either the first or second path.

The application provides a positioning method based on a reconfigurable intelligent surface and a reconfigurable holographic metasurface, comprising: acquiring an actual reflection signal of a positioning target in a current period received by a receiver; determining an initial estimated position of the positioning target at a current moment based on the actual reflection signal in the current period; determining optimal parameters of the current period based on the initial estimated position of the positioning target at the current moment and a first expression; the first expression is determined by maximizing the ratio of the reflection signal to a preset noise; the optimal parameters of the current period include a phase shift of the reconfigurable intelligent surface and an amplitude of the reconfigurable holographic metasurface; and determining an estimated position of the positioning target in a period with the maximum signal-to-noise ratio as a final estimated position of the positioning target based on the optimal parameters of the current period and optimal parameters of other periods. Based on this, low-power consumption and low-cost radar positioning with high precision is realized by using a non-direct path channel.

This application provides an OTFS signal detection method, apparatus, and readable storage medium. The method includes: performing constellation modulation based on task data and mapping it to the time-delay-Doppler domain; constructing a time-frequency bidispersive channel model to obtain the received signal at the receiver; performing an orthogonal time-delay-Doppler modulation OTFS inverse transform on the received signal to obtain the received signal in the time-delay-Doppler domain; estimating a portion of the transmitted signal using interference-free region information symbols in the received signal in the time-delay-Doppler domain; calculating interference symbols of non-direct paths and eliminating interference at the corresponding positions of the received signal in the time-delay-Doppler domain; and iterative updating of the interference-free region and convergence of the full-domain detection. This application can significantly suppress symbol interference caused by out-of-bounds cyclic shifts, achieve refined processing of complex scattering paths, and reliably recover symbols of direct paths.

The present invention relates to an apparatus (1) for performing chromatic confocal measurement of parameters of a surface (2) of a sample, the apparatus comprising: a light source (4) configured to generate an illumination beam (6); an axial chromatic aberration lens (8) configured to apply the illumination beam (6) to the surface (2) of the sample and to retransmit a backscattered beam from the surface (2) of the sample to a measuring arm (10), wherein the measuring apparatus comprises a beam splitter (20) configured to guide two reflections in a beam splitter (23) to a so-called reflected beam in the backscattered beam (9) and the illumination beam (6), and wherein an optical compensator (24) is arranged in the direct path of the other beam.

Among the processes, methods, architectures, apparatuses, systems, devices, and computer program products for multipath relay disclosed herein, a WTRU is configured to: receive configuration information from a network node for configuring a multipath connection by the WTRU, the multipath connection including a direct path to the network node via a first link and an indirect path via a second link, the second link being a sidelink relay WTRU associated with the network node; receive first system information from the network node regarding a first serving cell associated with the direct path; receive a message from the network node to release the direct path; perform a serving cell change from the first serving cell to a second serving cell associated with the indirect path; and receive second system information of the second serving cell from the sidelink relay WTRU.

A method, apparatus, device, and medium for extracting direct path components are disclosed, relating to the field of communication technology. The method includes: acquiring wireless signals received by multiple receiving stations at multiple observation times; the wireless signals originate from the same transmitting source; the multiple receiving stations include a reference station and at least one non-reference station; comparing the wireless signal of each non-reference station with the wireless signal of the reference station to obtain the time difference of arrival (TDOA) spectrum between each non-reference station and the reference station; for each observation time, extracting multiple spectral peaks and corresponding time delay differences from the TDOA spectrum; tracking the trajectory of multiple propagation paths evolving over time based on the time delay differences at multiple observation times to obtain the time delay difference trajectory of each propagation path; and extracting the direct path component from the multiple propagation paths based on the stability index of the time delay difference trajectory. Therefore, this application can improve the accuracy of direct path component extraction, thereby reducing positioning and tracking errors.

This invention provides a bottle cap connection structure, including a bottle cap with an inner cavity and a container head with an outer peripheral engagement surface. The outer peripheral engagement surface of the container head protrudes outwards to form an annular retaining strip. The inner wall of the bottle cap is recessed inwards to form an annular retaining groove for accommodating the annular retaining strip. At least two stop protrusions are spaced apart around the same circumference on the inner wall of the annular retaining groove. When the bottle cap and the container head move relative to each other axially, the stop protrusions and the annular retaining strip cross over and engage with each other through the elastic deformation of the stop protrusions or the bottle cap. This invention provides phased, clear tactile feedback, replacing the original sliding friction, greatly reducing wear, and ensuring the durability of the tactile feel throughout the product's lifespan. Secondly, it forms an effective sealing barrier, blocking the direct path of evaporation of the contents, solving the problem of content leakage, and better preserving the contents.

This invention relates to the field of power system inspection technology, and discloses an inspection trajectory planning method, system, equipment, medium, and product. The method includes: generating an initial direct path from a preset flight start point to a preset flight end point according to the inspection flight mission; performing point-by-point detection on all candidate control points on the initial direct path; determining whether all candidate control points meet preset flight constraints; if it is determined that all candidate control points do not meet the preset flight constraints, dividing the initial direct path into several sub-segments, and determining the feasible region of candidate control points in each sub-segment; based on the feasible region of candidate control points in each sub-segment, under preset flight constraints, using a particle swarm optimization algorithm to iteratively update the positions of candidate control points in each sub-segment within the feasible region, obtaining the optimal control points of each sub-segment that meet the preset flight constraints and have the best overall cost, thereby significantly improving the efficiency and reliability of trajectory planning.

This invention discloses a reinforcement learning-based method for optimizing the performance of FAS-assisted satellite-to-ground communication. In air-to-ground communication, when the direct path is blocked by obstacles, the signal is transmitted through a mixture of reflection from moving scatterers and the direct path. This invention describes the communication environment between the mobile transmitter and the ground user through geometric stochastic modeling, establishes a dynamic optimization framework based on FAS, couples satellite motion characteristics with adjustable FAS parameters to construct a three-dimensional channel model, designs an improved Memetic PPO reinforcement learning algorithm to dynamically optimize the FAS configuration set at the ground user in the discrete action space through a local search mechanism, and jointly optimizes channel capacity and modeling accuracy to generate the optimal strategy. This method reveals the nonlinear relationship between satellite motion and channel characteristics, significantly improves communication performance in complex obstruction environments, provides a new method for dynamic channel optimization of satellites, and has significant application value.