Patent ID: 8311054

Claim:
A transmitting and receiving system comprising: a plurality of nodes configured to communicate with each other in accordance with communication cycles including a plurality of slots, at least one of the plurality of slots including a control field for controlling a transmitting priority of a dynamic slot, wherein at least one of the nodes is configured to set control information including a preferential usage request for the dynamic slot in which the at least one of the nodes transmits, in the control field and to notify the rest of the nodes of the control information including the preferential usage request for the dynamic slot, and wherein the control information set in the control field includes a plurality of bits corresponding to a plurality of dynamic slots, and the at least one of the nodes is configured to set one of the plurality of bits corresponding to the dynamic slot in which the at least one of the nodes transmits preferentially, to a certain value indicating a position of the dynamic slot in which the at least one of the nodes transmits preferentially.