Then we propose “ hashed scheduling method in Section 4.2, which can reduce the unused regions in the scheduling table for the asynchronous time-slot phase network shown in Fig. In this situation, the efficiency of the time-slot-based optical burst allocation is inefficient since many unused time regions remain in the time-slot scheduling table, as shown in Fig. This method is called local time-based scheduling (Fig. In the global time-based scheduling, we shift the time-slot-search start point by the value determined by the propagation delay along the optical burst route from a certain reference node, which is preselected in the netw ork.