TERMINAL DEVICE, RELAY TERMINAL DEVICE, AND COMMUNICATION CONTROL METHOD

摘要

Provided are respective communication control procedures of a terminal device and a relay terminal device, and a mobile communication system or the like with which the terminal device or the relay terminal device establishes a communication path with the terminal device or the relay terminal device in proximity through a proximity communication service, and the terminal device or the relay terminal device newly establishes a communication path through a proximity service while continuing transmission and reception of data in the established communication path and switches the transmission and reception of data to the newly established communication path.;The terminal device or the relay terminal device performs a switching procedure including means for newly establishing a communication path during the transmission and reception of data in a ProSe service and switching to the newly established communication path.