COMMUNICATION SYNCHRONIZATION METHOD AND COMMUNICATION TERMINAL

PROBLEM TO BE SOLVED: To provide a communication synchronization method which does not need a reference station and has short convergence time, until reaching synchronization. SOLUTION: A communication terminal receives transmission data of a plurality of other communication terminals, measures the transmission timing (step 10), and obtains a first control amount Δ from the transmission timing (step 12). Next, a second control amount Δ* is determined by an equality Δ*=Δ, when ¾Δ¾≥Tg/4 or when ¾Δ¾≥Δλ/2¾, with the transmission timing of the largest absolute value being denoted as Δλ, and by an equality Δ* =Δλ/2 (with an upper limit denoted as Tg/4 and a lower limit being denoted as -Tg/4), when ¾Δ¾