Communication nodes, systems, communication method, and communication program

Communication node (101-1) is from can respond first communication node of the plurality of communication nodes (101) (101), receives a response signal to the transmitted acknowledgment signal. Communication node (101-1), based on the reception strength of the received response signal from the second communication node for requesting the execution of the data processing from the own communication node (101) to (101) a first communication node (101) select. Communication node (101-1), based on the received intensity of the response signal from the second communication node selected (101), capable of communicating between the second communication node (101) and the own communication node (101) to calculate the transmission strength. Communication node (101-1) transmits to the second communication node by sending strength was calculated request signal for requesting the execution of the data processing (101).