Base station and user terminal for determining device-to-device (D2D) discovery parameters including resource pool information used for D2D discovery

摘要

A user terminal is configured to execute processes of: receiving control information from a serving cell, the control information transmitted by a dedicated signaling to the user terminal, wherein the control information requests acquisition of device-to-device discovery parameters included in a system information block of different frequency than the serving cell, and the device-to-device discovery parameters include resource pool information used to device-to-device discovery; acquiring the device-to-device discovery parameters from a neighbor cell belonging to the different frequency designated by the control information; determining whether a valid period of the control information expires; and transmitting a message to the serving cell as long as within the valid period, the message including the device-to-device discovery parameters and an identifier of the different frequency.