5results about How to "Reduce positioning delay" patented technology

This invention discloses a method for distinguishing and marking multiple foreground objects in image data streams. The steps include: 1) connecting a camera to an FPGA, whereby the camera transmits the acquired fiber optic unit array image to the FPGA line-by-line in real-time in a streaming manner; 2) the FPGA detects the received image pixels, identifies and marks the light spot pixels; 3) the FPGA calculates the optical centroid coordinates of the corresponding light spot pixels based on the marked light spot pixels. This invention can process the image data stream in real-time at the image acquisition end, distinguishing and marking each fiber optic light spot pixel. This allows for real-time calculation of the light spot centroid at the image acquisition end while maintaining accuracy, thereby greatly reducing data transmission volume and enabling the host computer to obtain the optical centroid coordinates of the fiber optic unit in real-time. This provides an accurate and real-time labeled image data stream for subsequent optical centroid calculation, thus improving overall positioning efficiency.

This application discloses a method, apparatus, device, and storage medium for configuring uplink positioning reference signals, relating to the field of mobile communications. The method includes: sending a request message to a network device and / or a Location Management Function (LMF) network element; wherein the request message is used to request the network device and / or the LMF network element to configure the uplink positioning reference signal for a terminal device. By having the terminal device actively request the configuration of the uplink positioning reference signal from the network device and / or the LMF network element, it is possible to configure the uplink positioning reference signal for the terminal device immediately upon its request, even when the terminal device releases the stored uplink positioning reference signal configuration. This reduces the time delay in configuring the uplink positioning reference signal for the terminal device, thereby reducing positioning latency and improving the flexibility of configuring the uplink positioning reference signal.

The present application relates to a kind of optimization method and system of timing diagram subgraph matching.The method includes: time block is carried out to original timing diagram, and the edge with same end point is aggregated and compressed in each time block to generate intra-block multi-edge object, to build block index in turn;Query graph with time constraint is received, with the edge in query graph as matching unit to execute search, and maintain current legal time window;In candidate generation stage, according to current to be matched data vertex pair and current legal time window, construct cache key, and carry out exploration in hotspot cache;If hotspot cache is not hit, then use current legal time window to locate target time block, and execute intersection operation in target time block to generate candidate multi-edge list;When current to be matched data vertex pair meets preset hotspot condition, the candidate multi-edge list is written into hotspot cache;Continue to execute search based on the candidate multi-edge list of hit or generated candidate multi-edge list, until outputting model matching result.

This invention discloses a cooperative localization method for aircraft in ad hoc networks, relating to the field of aircraft cooperative localization. It utilizes the relative distance and angle measurements between aircraft within a two-hop link and the positions of observable anchor nodes within that two-hop link to construct a multi-hop link joint observation. A weight matrix is ​​constructed by combining the influence of ranging and angle measurement errors on the localization error. Cooperative localization of the aircraft in the ad hoc network is then achieved based on a weighted linear least squares algorithm. Compared to conventional cooperative localization methods, this method does not require aggregating all link measurement results to a central computing node for position calculation. It only needs to collect measurement results within a two-hop link to autonomously calculate the position of its own nodes, resulting in low communication overhead and low localization latency between aircraft.

The application provides a method, a terminal device and a network device for positioning. The method comprises: a terminal device obtaining first information in an initial access process, the first information being used for positioning the terminal device, and the first information being associated with direction information of the terminal device relative to a base station. Based on the above technical solution, the terminal device can obtain the first information associated with the direction information of the terminal device relative to the base station in the initial access process, that is, the terminal device can obtain the first information before entering an RRC connected state, thereby reducing the time delay of the terminal device in obtaining the direction information and being beneficial to reducing the positioning time delay.