INFORMATION PROCESSOR, INFORMATION PROCESSING METHOD THEREFOR, INFORMATION PROCESSING SYSTEM AND METHOD THEREFOR, AND PROVISION MEDIUM

PROBLEM TO BE SOLVED: To maintain consistency of the synchronization for synchronous communication between different environment. SOLUTION: In a bridge 2, a comparison part 21 compares the value of a cycle time register 20-1 with the value of the cycle time register 20-2 and transmits the error value to a node 3-1, which is the cycle master of a radio environment as a cycle report packet. The node 3-l receives the cycle report packet transmitted from the bridge 2 and corrects the value of the cycle time register 30-1 corresponding to the contents. Then, the node 3-1 transmits a frame synchronous packet to the respective nodes in the radio environment with a timing, corresponding to the corrected value of the cycle time register 30-1. The respective nodes reset the values of the respectively provided cycle time registers, corresponding to the frame synchronous packet transmitted from the node 3-1.