Multi-hop wireless networks
First Claim
1. A method comprising:
- receiving a path configuration message at one or more nodes in a multi-hop network, the path configuration message including path information, one or more channel access parameters associated with the path information, and a time to live parameter specifying a length of time that the one or more channel access parameters are valid;
transmitting from the one or more nodes that received the path configuration message, any traffic matching the path information, using the one or more channel access parameters; and
the one or more nodes discarding the one or more channel access parameters in response to expiration of the length of time and resuming using default channel access parameters in place of the one or more channel access parameters.
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Abstract
A path configuration message is sent to nodes in a multi-hop network along a path between a source node and destination nodes. The path configuration message includes path information and one or more special channel access parameters associated with the path information. The path configuration message temporarily changes the channel access priority for packets matching the path information in the special message. The nodes along the path therefore have higher channel access priority relative to other nearby nodes and other traffic flows. At the end of the a length of a time determined by a time to live parameter in the special message, the nodes resume using default channel access parameters in place of the special channel access parameters for packets matching the path information.
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Citations
20 Claims
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1. A method comprising:
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receiving a path configuration message at one or more nodes in a multi-hop network, the path configuration message including path information, one or more channel access parameters associated with the path information, and a time to live parameter specifying a length of time that the one or more channel access parameters are valid; transmitting from the one or more nodes that received the path configuration message, any traffic matching the path information, using the one or more channel access parameters; and the one or more nodes discarding the one or more channel access parameters in response to expiration of the length of time and resuming using default channel access parameters in place of the one or more channel access parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising:
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transmitting a first path configuration message to a plurality of nodes in a multi-hop wireless network, the first path configuration message including path information and one or more channel access parameters associated with the path information, the path configuration message including a time to live parameter specifying how long the one or more channel access parameters are valid; and recalling the first path configuration message by transmitting a second path configuration message to the plurality of nodes, the second path configuration message including the path information and a time to live parameter having a predetermined value. - View Dependent Claims (11, 12, 13)
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14. A wireless node comprising:
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a transmitter and receiver; the wireless node responsive to receipt by the receiver of a path configuration message including path information and one or more channel access parameters associated with the path information, to record the path information and the one or more channel access parameters; and the wireless node further responsive to transmit via the transmitter, packets with matching path information according to the one or more channel access parameters and to transmit other packets not matching the path information with default channel access parameters; wherein the one or more channel access parameters provide increased channel access priority for packets matching the path information as compared to the default channel access priorities; wherein the wireless node is further responsive to a time to live parameter in the path configuration message to resume using the default channel access parameters in place of the one or more channel access parameters after a length of time specified in the time to live parameter has elapsed. - View Dependent Claims (15, 16, 19, 20)
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- 17. The wireless node as recited in 14 further responsive to a received default path configuration message to adjust default channel access parameters in accordance with the default path configuration message.
Specification