Control apparatus and communication terminal

A control apparatus, comprising:

• a base station configured to:
• receive, from a first communication terminal of a plurality of communication terminals, a connection request to establish a direct communication link with a second communication terminal of the plurality of communication terminals;
• determine a distance between the first communication terminal and the second communication terminal;
• transmit, based on the distance being one of less than or equal to a threshold distance, a confirmation request to each of the first communication terminal and the second communication terminal, wherein the confirmation request includes:
• at least one parameter to establish the direct communication link, and
• first timing information that indicates a first time period for reception, of a confirmation result that indicates a first value, from at least one of the first communication terminal or the second communication terminal;
• receive, from at least one of the first communication terminal or the second communication terminal, the confirmation result, wherein the confirmation result indicates the first value based on the at least one parameter in the confirmation request;
• transmit, based on the first value being greater than a minimum threshold value, a switch request to the first communication terminal and the second communication terminal to establish the direct communication link;
• and
• determine the first communication terminal as a base unit, based on a priority degree of the first communication terminal,
• wherein the base unit is concurrently in communication with the base station and the second communication terminal, and
• wherein the priority degree of the first communication terminal is a sum of at least a first numerical value indicating a number of direct communication wireless systems supported by the first communication terminal and a second numerical value indicating a state of a connection of the first communication terminal with the base station.