A system information transmission method and device

Abstract

A system information transmission method and device to reduce the complexity and power consumption of system information transmission. The second terminal device sends identification information, and the first terminal device obtains the identification information sent by the second terminal device. The identification information includes the first cell identification, and the first cell identification is before the second terminal device completes the establishment of the direct link with the first terminal device. The cell ID of the cell where the cell resides or the serving cell. If the first terminal device determines that the first cell ID is inconsistent with the second cell ID, it sends a first message to the second terminal device, and the second terminal device receives the first message. The cell ID of the cell where the device resides or the serving cell after the direct link is established, or the cell ID of the cell where the first terminal device resides or the serving cell, the first message is the cell ID of the cell where the first terminal device resides or the serving cell Some or all of the system information in System Information.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a system information transmission method and device. Background technique [0002] The device-to-device (D2D) communication method refers to a communication method in which the sending end directly sends data to the receiving end without transiting through a base station or a cellular network. A special method in the D2D communication method is the UE-to-Network relay scenario. In the UE-to-Network relay scenario, a terminal device (such as user equipment (User Equipment, UE)) passes another terminal with a relay function The equipment is connected to the network, and the former is generally called a remote user equipment (Remote UE), and the latter is called a relay user equipment (Relay UE). [0003] In the UE-to-Network relay scenario, when the remote user equipment newly accesses a cell or the system information of the cell accessed by the remote user ...

AI Technical Summary

Problems solved by technology

For the remote user equipment within the coverage of the cell, the system information broadcast by the base station of the cell can be received through the cellular link between the remote user equipment and the base station, but in this case, the remote user equipment needs to maintain two links road, which are the cellular link and the sidelink (the link between the remote user equipment and the relay user equipment), respectively, with high complexity and high power consumption

For remote user equipment outside the coverage of the cell, it will not be able to obtain the system information broadcast by the base station of the cell

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