Patent ID: 8249093

Claim:
A communication device performing access control in a network constituted of a plurality of communication devices such that communication timing of a packet will not collide with communication timing of another device by detecting a signal transmitted from another device, the communication device comprising; a transmission and reception unit configured to transmit a request-to-send packet to a second communication device in the network, receive from the second communication device a request-to-send acknowledgement response packet relative to the request-to-send packet, transmit a data packet to the second communication device in response to reception of the request-to-send acknowledgement response packet, and receive from the second communication device a packet concerning a reception acknowledgement response relative to the data packet; and a control unit configured to write first information on a period of time until reception of the request-to-send acknowledgement response packet is completed in the request-to-send packet and second information on a period of time until reception of the packet concerning the reception acknowledgement response relative to the data packet is completed in the data packet, wherein based on the first information and the second information, a third communication device in the network is prohibited from performing transmission processing, and the packet concerning the reception acknowledgement response relative to the data packet is not transmitted immediately following reception of the data packet.