Patent ID: 9131436
Filing Date: 2015-09-08
Classification: H04W

Abstract:
1. A mobile communication method, used in a case where a first radio link has been set in a radio base station interface between a first mobile station and a radio base station, a second radio link has been set in a radio base station interface between a second mobile station and the radio base station, and a third radio link has been set in an inter-mobile station interface between the first mobile station and the second mobile station, comprising: a step of transmitting, by the first mobile station, a synchronization request signal to the radio base station via the first radio link when generation of a data signal to be transmitted to the second mobile station is detected in a state in which synchronization of the third radio link has not been established; a step of notifying, by the radio base station, the first mobile station and the second mobile station of a radio resource for first preamble transmission in the third radio link via the first radio link and the second radio fink in response to the synchronization request signal; a step of transmitting, by the first mobile station, a first preamble to the second mobile station by using the radio resource for first preamble transmission; a step of transmitting, by the second mobile station, first timing information indicating deviation of a reception timing of the first preamble from a desired timing to the radio base station via the second radio link on a basis of the received first preamble; and a step of transmitting, by the radio base station, first adjustment information for adjusting a transmission timing of a data signal in the third radio link to the first mobile station via the first radio link on a basis of the received first timing information, wherein when the first adjustment information is not received within a predetermined period, the first mobile station notifies the radio base station eNB of a message for informing a fault of the third radio link.