“…5) The first meeting time of any two nodes moving in the same fixed movement mode, starting from a random time, is exponentially distributed. This assumption is reasonable when R L c and R L [12], and has been extensively used in recent years [14], [23], [24], [27], [28], [29] 7) The delay of a message transmission, which corresponds to a short time, is negligible [10], [12], [19], [23], [24], [30], [31], [32], [33], [34], [35].…”