Mobile communication system and user terminal

摘要

A mobile communication system comprises a first user terminal having a scheduling function of assigning a radio resource used for the D2D communication. When the scheduling function is enabled, the first user terminal broadcasts periodically or aperiodically a message including identification information indicating that the first user terminal is a scheduling terminal that performs the assignment of the radio resource.

主权项

1. A mobile communication system that supports D2D communication that is direct device-to-device communication, comprising:
a first user terminal having a scheduling function of assigning a radio resource used for the D2D communication; and a second user terminal in which the assignment of the radio resource is not managed by the first user terminal, wherein in response to the scheduling function being enabled, the first user terminal broadcasts periodically or aperiodically a message including identification information indicating that the first user terminal is a scheduling terminal that performs the assignment of the radio resource, and when a signal including the message from the second user terminal is detected and a synchronization timing for the D2D communication is deviated with the second user terminal the first user terminal performs a correction for aligning the synchronization timing.