Network node, terminal apparatus, control method, and computer-readable storage medium for enhancing efficiency in communication using carrier waves

A network node, comprising:

• one or more processors;
• and
• one or more memories that store a computer readable instruction for causing, when executed by the one or more processors, the one or more processors to function as:
• an obtaining unit configured to obtain, from a terminal apparatus, information relating to a first received power of a first carrier wave and a second received power of a second carrier wave for the terminal apparatus;
• a determination unit configured to determine whether or not a difference value between the first received power and the second received power is greater than a predetermined value on a basis of the information;
• and
• a control unit configured to, in a case where the terminal apparatus is performing communication using dual connectivity or carrier aggregation using the first carrier wave and the second carrier wave and a difference value between the first received power and the second received power is determined to be greater than the predetermined value, control the terminal apparatus to end the communication.

A terminal apparatus that is connected to a base station, which uses first information, obtained from the terminal apparatus, for specifying a communication circuit of the terminal apparatus to perform control regarding dual connectivity or carrier aggregation, the terminal apparatus comprising:

• one or more processors;
• and
• one or more memories that store a computer-readable instruction for causing, when executed by the one or more processors, the one or more processors to function as:
• a reporting unit configured to report, to the base station apparatus, the first information and second information relating to a first received power of a first carrier wave and a second received power of a second carrier wave, wherein the first carrier wave and the second carrier wave are used for the dual connectivity or the carrier aggregation.

A control method executed by a network node, comprising:

• obtaining, from a terminal apparatus, information relating to a first received power of a first carrier wave and a second received power of a second carrier wave for the terminal apparatus;
• determining whether or not a difference value between the first received power and the second received power is greater than a predetermined value on a basis of the information;
• and
• controlling the terminal apparatus to start communication using dual connectivity or carrier aggregation using the first carrier wave and the second carrier wave on a basis of the difference value between the first received power and the second received power being determined to be less than the predetermined value.

A control method executed by a network node, comprising:

• obtaining, from a terminal apparatus, information relating to a first received power of a first carrier wave and a second received power of a second carrier wave for the terminal apparatus;
• determining whether or not a difference value between the first received power and the second received power is greater than a predetermined value on a basis of the information;
• and
• in a case where the terminal apparatus is performing communication using dual connectivity or carrier aggregation using the first carrier wave and the second carrier wave and a difference value between the first received power and the second received power is determined to be greater than the predetermined value, controlling the terminal apparatus to end the communication.

A non-transitory computer-readable storage medium that stores a program for causing a computer provided in a network node to:

• obtain, from a terminal apparatus, information relating to a first received power of a first carrier wave and a second received power of a second carrier wave for the terminal apparatus;
• determine whether or not a difference value between the first received power and the second received power is greater than a predetermined value on a basis of the information;
• and
• control the terminal apparatus to start communication using dual connectivity or carrier aggregation using the first carrier wave and the second carrier wave on a basis of the difference value between the first received power and the second received power being determined to be less than the predetermined value.

A non-transitory computer-readable storage medium that stores a program for causing a computer provided in a network node to:

• obtain, from a terminal apparatus, information relating to a first received power of a first carrier wave and a second received power of a second carrier wave for the terminal apparatus;
• determine whether or not a difference value between the first received power and the second received power is greater than a predetermined value on a basis of the information;
• and
• in a case where the terminal apparatus is performing communication using dual connectivity or carrier aggregation using the first carrier wave and the second carrier wave and a difference value between the first received power and the second received power is determined to be greater than the predetermined value, control the terminal apparatus to end the communication.