Patent ID: 10880796

Abstract:
A user terminal, user terminal chipset, and method performed at a user terminal receives a system information block (SIB) from a base station. The SIB includes information indicating a resource pool to be used for device-to-device (D2D) discovery in a cell of the base station, a frequency list indicating frequencies different from a frequency of the cell and available for the D2D discovery, and usage identification information associated with frequency identifiers in the frequency list and indicating whether to be available for public safety (PS). Determination is made, based on whether the user terminal satisfies a predetermined condition, of one of the D2D discovery for the PS and the D2D discovery for the non-PS, a frequency available for the PS is selected based on the usage identification information when the user terminal performs the D2D discovery for the PS, and the selected frequency is used to perform the D2D discovery.