| 摘要 |
A user terminal according to a first aspect is a user terminal that exists in a serving cell, in a mobile communication system that supports a D2D proximity service. The user terminal includes: a receiver configured to receive inter-cell synchronization information on whether a neighbor cell is synchronized with the serving cell, from a base station that forms the serving cell; and a controller configured to determine, on the basis of the inter-cell synchronization information, whether to perform an inter-cell synchronization procedure for establishing synchronization with a proximal terminal that exists in the neighbor cell, before performing inter-cell discovery procedure with the proximal terminal or inter-cell D2D communication with the proximal terminal. |
