Abstract: This disclosure provides a beam information indication method and an apparatus. The terminal device obtains reference domain information of a plurality of beams and a first offset corresponding to each moment, to update beam domain information, where the first offset indicates an offset of domain information of the plurality of beams relative to the reference domain information of the plurality of beams. In technical solutions provided in this disclosure, domain information of the plurality of beams can be updated with low signaling overheads. The technical solutions may be applied to a satellite communication system, to implement interference management of satellite beams.

Abstract: A first communication apparatus obtains first ephemeris information of a second communication apparatus, where the first ephemeris information includes information about m parameters of n parameters in second ephemeris information, n is equal to 6, and m is a positive integer less than n, and the n parameters include a first location parameter, a first location parameter, and a first location parameter in first location information, and a first velocity parameter, a first velocity parameter, and a first velocity parameter in first velocity information. The first communication apparatus determines values of the n parameters in the second ephemeris information based on the first ephemeris information, where the values of the n parameters include values of the m parameters and values of remaining n-m parameters. The first communication apparatus communicates with the second communication apparatus based on the second ephemeris information.

Abstract: This application provides a polarization reconfiguration method and a communication apparatus. A network device may send polarization pre-switching indication information to appropriately schedule and adjust user polarization within a base station or between base stations. A terminal device may switch a polarization mode in advance based on the polarization pre-switching indication information sent by the network device.

Abstract: Embodiments of this application relate to a method for controlling an antenna polarization direction and an antenna system. A first feed array and a second feed array whose polarization directions are orthogonal are disposed in the antenna system. A polarization direction of a beam of a third planar array may be adjusted by adjusting parameters such as beam widths/a beam width of the first feed array and/or the second feed array, phase centers/a phase center of the first feed array and/or the second feed array, and a phase difference between the first feed array and the second feed array.

Abstract: A gateway station switching method and apparatus. When quality of a link from a terminal device to a source gateway station through a satellite is poor, the source gateway station sends third indication information to a target gateway station, so that the target gateway station feeds back second channel quality to the source gateway station, that is, quality of a link from the terminal device to the target gateway station through the satellite. The source gateway station determines, based on the second channel quality and first channel quality that represents the quality of the link from the terminal device to the source gateway station through the satellite, whether to switch the terminal device to the target gateway station.

Abstract: The disclosure provides satellite communication methods and related devices. One example method includes that a device receives a first common timing advance (TA) parameter and a first common TA change amount calculation parameter, where the first common TA parameter is used to obtain a first common TA, and the first common TA change amount calculation parameter is used to update the first common TA to obtain an updated common TA. The device sends a random access preamble by using the updated common TA.

Abstract: This application relates to the field of space communications technologies, and provides an acquisition, pointing, and tracking (APT) subsystem and a spacecraft communications system. The APT subsystem includes a first controller, a first terahertz transceiver, and a terahertz antenna array that are sequentially connected, where the first terahertz transceiver is configured to modulate and demodulate a terahertz wave; the terahertz antenna array is configured to send and receive the terahertz wave; and the first controller is configured to control the first terahertz transceiver to acquire, point, and track another APT subsystem by using the terahertz antenna array.

Abstract: This application relates to the field of space communications technologies, and provides an acquisition, pointing, and tracking (APT) subsystem and a spacecraft communications system. The APT subsystem includes a first controller, a first terahertz transceiver, and a terahertz antenna array that are sequentially connected, where the first terahertz transceiver is configured to modulate and demodulate a terahertz wave; the terahertz antenna array is configured to send and receive the terahertz wave; and the first controller is configured to control the first terahertz transceiver to acquire, point, and track another APT subsystem by using the terahertz antenna array.

Abstract: A processing box, comprising a housing, the housing comprising two end plates located at two opposite ends; and deflectable deflection sliders, being provided at the bottom of the housing, the deflection sliders being provided on the housing by means of a rotating shaft, and being able to rotate on the surface of the bottom wall of the housing. When the processing box is mounted in an image forming device by means of a mounting bracket on the image forming device, the deflection sliders cooperate with a guide portion of the mounting bracket and deflect in accordance with the guide portion of the mounting bracket, so that the processing box can be deflected firstly relative to the image forming device and then be placed properly, thereby facilitating the mounting of the processing box.

Abstract: A processing box, comprising a housing, the housing comprising two end plates located at two opposite ends; and deflectable deflection sliders, being provided at the bottom of the housing, the deflection sliders being provided on the housing by means of a rotating shaft, and being able to rotate on the surface of the bottom wall of the housing. When the processing box is mounted in an image forming device by means of a mounting bracket on the image forming device, the deflection sliders cooperate with a guide portion of the mounting bracket and deflect in accordance with the guide portion of the mounting bracket, so that the processing box can be deflected firstly relative to the image forming device and then be placed properly, thereby facilitating the mounting of the processing box.

Abstract: This application describes examples of antenna modules, MIMO antennas, and terminals. One example antenna module includes a clearance area, a support, and at least two branches. Each branch is disposed on the support, and a partial projection of the support on a horizontal plane falls within the clearance area, while a projection on the horizontal plane of one end that is of each branch and that is configured to connect to a feed point is outside the clearance area. A projection of a tail end on the horizontal plane is inside the clearance area.

Abstract: This application describes examples of antenna modules, MIMO antennas, and terminals. One example antenna module includes a clearance area, a support, and at least two branches. Each branch is disposed on the support, and a partial projection of the support on a horizontal plane falls within the clearance area, while a projection on the horizontal plane of one end that is of each branch and that is configured to connect to a feed point is outside the clearance area. A projection of a tail end on the horizontal plane is inside the clearance area.