SERVER DEVICE AND TERMINAL DEVICE

摘要

A server device or a terminal device can perform switching of a path or a communication channel between an infrastructure communication through a network such as an EPC, and a Relay communication through a direct communication with a Relay UE, and can continuously provide a service. A routing information request message includes at least identification information indicating that switching of a communication is required. A third terminal device having a relay function is selected based on the routing information request message. A routing update instruction message which is a response to the routing information request message and includes information of the third terminal device is transmitted to the first terminal device. A direct communication with the third terminal device is performed by using LTE, so as to perform an instruction of communicating with the first terminal device. Thus, a communication channel is switched.

主权项

1. A server device adapted to:
receive a routing-information update request message transmitted by a second terminal device, which performs communication with a first terminal device through a core network, from the first terminal device, the routing-information update request message including at least identification information indicating that switching of a communication is required; select a third terminal device having a relay function, based on the identification information; and transmit a routing update instruction message which is a response to the routing-information update request message, and includes information of the third terminal device, to the first terminal device, and perform an instruction of performing a direct communication with the third terminal device by using LTE, so as to communicate with the first terminal device.