| 摘要 |
In order to make a discovery service providing system provide a discovery service in a direct communications system between a first terminal and a second terminal, when a service server receives a discovery service request signal including identification information of the first terminal from the second terminal, the service server checks location information of the first terminal and the second terminal. In the case of a location where the device-to-device direct communications are possible, the service server requests a resource assignment for the discovery service including the identification information of the first terminal and the second terminal to an EPC. The EPC checks a state of the first terminal. When the first terminal is idle, the EPC transmits a paging message including the identification information of the second terminal and assigned resource information to the first terminal. The second terminal, which receives the paging message, transitions a state from an idle state to a connected state, and after receiving a discovery signal transferred from the second terminal, the direct communications are carried out between the first terminal and the second terminal. |
