User terminal, processor, and base station
A user terminal in a mobile communication system supporting D2D communication that is direct device-to-device communication comprises a controller configured to establish a D2D communication bearer used for the direct D2D communication between the user terminal and other user terminal that is a partner terminal of the D2D communication, in accordance with a parameter that characterizes a property of D2D data transmitted by the D2D communication; and a transmitter configured to transmit the D2D data corresponding to the parameter via the D2D communication bearer depending on the parameter by using a radio resource assigned in accordance with the parameter.
1. A user terminal comprising:
a controller configured to include a processor and a memory;
a receiver; and
a transmitter, wherein
the receiver is configured to receive, from a base station, information on priorities of data transmitted by direct communication performed between terminals,
the transmitter is configured to transmit, to the base station, first information together with second information on a basis of the received information when there are a plurality of pieces of data to be transmitted by the direct communication, wherein the first information indicates priorities respectively of the plurality of pieces of data and the second information indicates data amounts of the plurality of pieces of data,
the receiver is configured to receive, from the base station, resource information of radio resources allocated based on the first information and the second information, and
the controller is configured to control for:
establishing bearers corresponding to the priorities respectively of the plurality of pieces of data transmitted by the direct communication, wherein the bearers are established between the user terminal and another user terminal, and the bearers are used for the direct communication; and
transmitting, to the another user termina, each of the plurality of pieces of data via a bearer corresponding to each of the priorities from among the bearers by using the received resource information.
2. The user terminal according to claim 1 , wherein
the controller is configured to perform control of at least one of transmitting and receiving keep-alive information for confirming that a connection between the user terminal and the another user terminal is effective.
3. The user terminal according to claim 1 , wherein
the controller is configured to establish, between the base station and the user terminal, a radio bearer used for cellular communication that is communication via the base station, co-existing with the bearers, and
the receiver is configured to receive the resource information, via the radio bearer.
4. A processor, communicatively coupled to a memory configured to store a program for causing the processor to perform processes, wherein the processor executes the processes of:
receiving, from a base station, information on priorities of data transmitted by direct communication performed between terminals;
transmitting, to the base station, first information together with second information on a basis of the received information when there are a plurality of pieces of data to be transmitted by the direct communication, wherein the first information indicates priorities respectively of the plurality of pieces of data and the second information indicates data amounts of the plurality of pieces of data;
receiving, from the base station, resource information of radio resources allocated based on the first information and the second information;
establishing bearers corresponding to the priorities respectively of the plurality of pieces of data transmitted by the direct communication, wherein the bearers are established between a user terminal controlled by the processor and another user terminal, and the bearers are used for the direct communication; and
transmitting, to the another user terminal, each of the plurality of pieces of data via a bearer corresponding to each of the priorities from among the bearers by using the received resource information.