Patent ID: 7391789

Claim:
An ad-hoc network wireless communication system that transmits data packets from one hop to another hop in a relay manner, the communication system comprising: a transmitting node operable to transmit a request-to-send (RTS) message in order to transmit the data packets; and a receiving node, existing in a next hop of the transmitting node, operable to transmit a responsive clear-to-send (CTS) message in response to the RTS message transmitted from the transmitting, node, and operable to transmit a responsive CTS message in response to a CTS message transmitted from another receiving node successively connected to the receiving node, the receiving node comprising: a receiving unit operable to receive at least one of the group consisting of the RTS message and the CTS message, a message conversion unit operable to convert the CTS message into a converted RTS message, and a transmitting unit operable to transmit a responsive CTS message in response to at least one of the group consisting of the received RTS message and the converted RTS message; wherein the receiving node transmits the responsive CTS message to another receiving node successively connected to the receiving node in response to the transmitted CTS message, and the transmitting node transmits the data packets to the receiving node in the case that responsive CTS messages transmitted by the receiving node of the next hop are received over a predetermined number of times.