Ad-hoc network wireless communication system and method thereof
First Claim
1. 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, anda 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.
1 Assignment
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Accused Products
Abstract
An ad-hoc network wireless communication system transmits data packets from one hop to another hop in a relay manner, and includes a transmitting node for transmitting a RTS message in order to transmit the data packets, and a receiving node, existing in a next hop of the transmitting node, for transmitting a CTS message in response to the RTS message transmitted from the transmitting node. The receiving node transmits the 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 the CTS message transmitted by the receiving node of the next hop is received over a predetermined number of times. The ad-hoc network wireless communication system can maximize the communication efficiency in a multi-hop network with its complexity minimized by extending a MAC protocol based on a IEEE 802.11 DCF to a reservation-based MAC in the multi-hop network.
14 Citations
12 Claims
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1. 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:
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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. - View Dependent Claims (2, 3, 4)
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- 5. The communication system as claimed in claimed 4, wherein the transmitting node includes a counter operable to count a number of receptions of responsive CTS messages received from the receiving node.
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7. A wireless communication method for an ad-hoc network wireless communication system that transmits data packets from one hop to another hop in a relay manner, the communication method including:
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(a) a transmitting node transmitting a request-to-send, (RTS) message to a receiving node existing in a next hop in order to transmit the data packets; (b) the receiving node transmitting a responsive clear-to-send (CTS) message in response to the transmitted RTS message; (c) the receiving node transmitting the responsive CTS message to another receiving node successively connected to the receiving node in response to the transmitted CTS message; and (d) the transmitting node transmitting the data packets to the receiving node of the next hop in the case that the transmitting node receives responsive CTS messages transmitted by the receiving node of the next hop over a predetermined number of times; (e) the receiving node receiving at least one of the group consisting of the RTS message and the CTS message; and (f) the receiving node converting the received CTS message into a converted RTS message; wherein the responsive CTS message is transmitted in response to at least one of the group consisting of the received RTS message and the converted RTS message. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification