6results about How to "Expand communication coverage" patented technology

The embodiment of the invention provides an intelligent reflecting surface coverage enhancement method and device for electric power inspection, and the method comprises the steps: building an intelligent reflecting surface and inspection equipment unified scheduling model, and building a unified scheduling model for a multi-intelligent reflecting surface networking network; deducing a signal interference distribution analytic expression, solving a space measure function of a point process and determining heterogeneous station density based on an interference level; constructing a multi-intelligent reflector networking correlation model, and analyzing a link coupling factor; based on modeling of a link coupling factor, the link performance under the collaborative networking is studied; a cross-domain reconfigurable capability boundary is explored, and a spatial statistical average analysis method for coverage, capacity and mobility performance is innovated; an adjustable intelligent reflecting surface distribution dependence model is provided, and a semi-closed theoretical analysis expression of the user coverage rate is given based on a stochastic geometric tool.

The invention provides a low earth orbit satellite communication method, device and system and a storage medium, which are applied to the technical field of satellite communication, and the method comprises the following steps: receiving an uplink resource request sent by user section equipment through ground section equipment; the uplink resource request comprises a service requirement of the user section equipment; sending an uplink transmission permission to the user segment equipment according to the uplink resource request, and receiving a cache state report sent by the user segment equipment; the cache state report is used for representing the data transmission state of the user section equipment; determining an uplink transmission resource allocated to the user section equipment according to the cache state report and a data transmission state, estimated in the flight window time, of the low-orbit satellite; sending a first downlink control instruction to the user section equipment; the first downlink control instruction comprises an uplink transmission resource and is used for indicating the user section equipment to transmit uplink data to the low-orbit satellite on the uplink transmission resource. By adopting the technical scheme of the invention, the construction cost of the ground base station can be reduced and the communication coverage can be enlarged.

This disclosure provides a metasurface antenna element, comprising a first metal layer, a first dielectric substrate, a second metal layer, a second dielectric substrate, and a third metal layer stacked sequentially; the second metal layer has various shaped cutouts; the orthographic projections of the first dielectric substrate, the second dielectric substrate, and the second metal layer on a preset surface coincide, and their orthographic projection outlines are all first regular polygons; the orthographic projections of the first metal layer and the third metal layer on the preset surface coincide, and their orthographic projection outlines are all second regular polygons; the side length of the first regular polygon is a first preset multiple of the incident wave wavelength at the center frequency, and the side length of the second regular polygon is a second preset multiple of the incident wave wavelength at the center frequency, wherein both the first preset multiple and the second preset multiple are less than 1. This disclosure also provides an antenna structure.

The invention provides an unmanned aerial vehicle cluster networking communication system and method, and belongs to the technical field of unmanned aerial vehicle communication. Comprising at least one main control unmanned aerial vehicle, and the main control unmanned aerial vehicle is provided with a first communication module, a first positioning module, a first data processing module and a dynamic network management module. Each slave unmanned aerial vehicle is provided with a second communication module, a second positioning module and a second data processing module; the relay unmanned aerial vehicle is provided with a third communication module and a signal enhancement module; and the ground control center is connected with the main control unmanned aerial vehicle through wireless communication. Network topology can be dynamically adjusted according to position changes, communication quality parameters and task requirements of the unmanned aerial vehicles, multi-band communication switching is supported, data security is guaranteed by adopting dynamic key encryption, a perfect fault processing mechanism is provided, and high efficiency, stability and security of unmanned aerial vehicle cluster communication are ensured.

The invention provides an Msg4 transmission method and apparatus, and a storage medium. The method comprises the steps of determining a contention window of Msg4 based on a random access message; and receiving the repeatedly sent Msg4 in the contention window. According to the Msg4 transmission method and apparatus, and the storage medium provided by the present application, the contention window of the Msg4 is determined based on the random access message, and the repeatedly transmitted Msg4 is received in the contention window, thereby ensuring that the UE can receive the repeatedly transmitted Msg4, thereby expanding the communication coverage of the base station.

The invention discloses a single-module multi-channel self-adaptive frequency self-modulation repeater, which adopts single-module communication and can prevent the problem of mutual interference of multiple modules. The repeater frequency points can configure and set uplink and downlink receiving and transmitting frequency points, the specific scanning frequency point number and single frequency point CAD scanning time, the total CAD scanning time is automatically adjusted, different LoRa network configurations and applications are supported, and the utilization rate is improved; the relays can mark, identify and count data, so that a ping-pong mode is prevented from being generated between the relays, and the whole network is ensured to be in effective communication for more time; the repeater can set the number of times of multi-hop to prevent excessive forwarding from influencing the real-time performance of data and reduce invalid occupation during multi-relay; the repeater can be configured and set as a relay of a plurality of multi-frequency-point terminals, can also be set and configured as a relay of independent terminal nodes, and is not shared with other terminals. According to the repeater, the communication coverage range of the LoRaWAN is effectively improved, and the problem of insufficient distance or signal blind area is solved.