Response signal optimization method and communication system

摘要

PROBLEM TO BE SOLVED: To appropriately transmit a response signal to a signal transmitted using broadcasting.SOLUTION: A method for optimizing a response signal in a communication system 1 in which in response to a response request signal transmitted from a first communication apparatus 10 using broadcasting, a plurality of second communication apparatuses 20 transmit a response signal to the first communication apparatus 10 includes: when before any response signal of the response signals received by the first communication apparatus 10 from the plurality of second communication apparatuses 20, a vacant time in which the response signal can be received exists, determining whether or not adjustment of transmission timing of the response signal is necessary; and, when it is determined that adjustment of transmission timing of the response signal is necessary, adjusting the transmission timing of the response signal.SELECTED DRAWING: Figure 2