Radio communication system, radio station, radio terminal, communication control method, and non-transitory computer readable medium

A first radio station configured to serve a first cell, the first radio station comprising:

• a transceiver configured to communicate with a radio terminal;
• an interface configured to be connected with a second radio station that serves a second cell;
• and
• a processor configured to:
• support Dual Connectivity using the first cell and the second cell;
• perform, with a radio terminal, radio resource control for the first cell and the second cell in order to perform the Dual Connectivity;
• transmit, to the second radio station, update information regarding an update to a configuration related to the radio resource control for the second cell;
• and
• transmit, to the radio terminal through the second radio station, configuration information related to the radio resource control for the second cell.

A second radio station configured to serve a second cell, the second radio station comprising:

• a transceiver configured communicate with a radio terminal;
• an interface configured to be connected with a first radio station that serves a first cell;
• and
• a processor configured to:
• support Dual Connectivity using the first cell and the second cell;
• receive, from the first radio station, update information regarding an update to a configuration related to a radio resource control for the second cell;
• receive, from the first radio station, configuration information related to the radio resource control for the second cell;
• and
• transmit, to the radio terminal, the received configuration information related to the radio resource control for the second cell.

A radio terminal comprising:

• a transceiver configured to communicate with at least one of a first radio station and a second radio station;
• and
• a processor configured to:
• support Dual Connectivity using a first cell served by the first radio station and a second cell served by the second radio station;
• perform, with the first radio station, radio resource control for the first cell and the second cell in order to perform the Dual Connectivity;
• receive, from the first radio station through the second radio station, configuration information related to the radio resource control for the second cell.

A communication control method in a first radio station configured to serve a first cell, the method comprising:

• performing, with a radio terminal, radio resource control for the first cell and a second cell served by a second radio station, in order to perform Dual Connectivity using the first cell and the second cell;
• transmitting, to the second radio station, update information regarding an update to a configuration related to the radio resource control for the second cell;
• and
• transmitting to the radio terminal through the second radio station, configuration information related to the radio resource control for the second cell.

A communication control method in a second radio station configured to serve a second cell, the method comprising:

• receiving, from a first radio station, update information regarding an update to a configuration related to radio resource control for the second cell for Dual Connectivity using a first cell served by the first radio station and the second cell;
• receiving, from the first radio station, configuration information related to the radio resource control for the second;
• and
• transmitting, to the radio terminal, the received configuration information related to the radio resource control for the second cell.

A non-transitory computer readable medium storing a program for causing a computer to perform a communication control method in a first radio station configured to serve a first cell, wherein

• the communication control method comprises:
• performing, with a radio terminal, radio resource control for the first cell and a second cell served by a second radio station, in order to perform Dual Connectivity using the first cell and the second cell;
• transmitting, to the second radio station, update information regarding an update to a configuration related to the radio resource control for the second cell;
• and
• transmitting, to the radio terminal through the second radio station, configuration information related to the radio resource control for the second cell.

A non-transitory computer readable medium storing a program for causing a computer to perform a communication control method in a second radio station configured to serve a second cell, wherein

• the communication control method comprises:
• receiving, from a first radio station, update information regarding an update to a configuration related to radio resource control for the second cell for Dual Connectivity using a first cell served by the first radio station and the second cell;
• receiving, from the first radio station, configuration information related to the radio resource control for the second cell;
• and
• transmitting, to the radio terminal, the received configuration information related to the radio resource control for the second cell.

A non-transitory computer readable medium storing a program for causing a computer to perform a communication control method in a radio terminal, wherein

• the communication control method comprises:
• performing, with a first radio station, radio resource control for a first cell served by the first radio station and a second cell served by a second radio station, in order to perform Dual Connectivity using the first cell and the second cell;
• and
• receiving, from the first radio station through the second radio station, configuration information related to the radio resource control for the second cell.