A delay indication method and device for satellite communication

Abstract

The present application provides a delay indication method and device for satellite communication. Wherein, the method includes: the satellite base station obtains the sub-area division result of the satellite beam, and the satellite beam includes a plurality of sub-areas; the satellite base station sends the delay indication information of the sub-area to the user equipment, and the delay indication information is used to indicate the sub-area to the user equipment public delay. According to the above method, the satellite beam of the satellite base station is divided into multiple sub-areas. Compared with the original satellite beam, the time delay difference between different user equipment in the sub-area and the satellite base station is smaller, which can be smaller than that of the existing 5G NR , LTE and other communication standards defined in the maximum delay difference. The satellite base station informs the public delay of the sub-area where the user equipment is located. When the user equipment and the satellite base station have uplink communication, no matter which sub-area the user equipment is located in, the uplink timing advance operation can be performed according to the public delay of the sub-area where the user equipment is located. , thereby expanding the communication coverage of the satellite base station.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a delay indication method and device for satellite communication. Background technique [0002] Compared with ground base stations, satellite base stations have a higher position, more flexible deployment, can provide wider coverage, and can provide communication services for areas such as oceans, forests, and high altitudes that are difficult for ground base stations to cover. Therefore, if the satellite communication network is integrated with ground communication networks such as the fifth generation mobile networks newradio (5G NR) and long term evolution (LTE), it will greatly expand ground communication. The coverage of the network provides stable communication services for ships, trains, airplanes and remote areas. [0003] Within the beam coverage range of a ground base station or a satellite base station, user equipment located at different ...

AI Technical Summary

Problems solved by technology

At present, communication standards such as 5G NR and LTE define the maximum delay difference of user equipment allowed under different subcarrier spacings. The maximum cell radius defined by the maximum delay difference is very small compared with the beam coverage of satellite base stations. Therefore, if ground communication standards such as 5G NR and LTE are applied to satellite communications, the communication range of satellite base stations will be greatly limited.

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