Method for channel management and data transmission in wireless sensor network
First Claim
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1. A method for managing channel of a reception node included in a wireless sensor network, the method comprising:
- when a data frame is not received in at least one of a plurality of channels used in the wireless sensor network, counting the number of times of not receiving a data frame;
when the number of times of not receiving a data frame from a first transmission node through a first channel among a plurality of channels is n, changing a state of the first channel into an unavailable state; and
informing the first transmission node about the unavailable state of the first channel through a second channel among the plurality of channels;
wherein the changing of the state of the first channel into the unavailable state comprises;
changing the state of the first channel in a channel table stored in the reception node; and
generating an unavailable channel bitmap through the channel table; and
wherein the informing of the first transmission node about the unavailable state of the first channel comprises;
after the state of the first channel is changed into the unavailable state, receiving a data frame from the first transmission node through the second channel; and
informing the first transmission node about the unavailable state of the first channel by using an ACK frame with respect to the received data frame.
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Abstract
A method for dynamically managing wireless channels to minimize channel interference between heterogeneous wireless devices, and transmitting data by effectively using channels, is provided. Interference between heterogeneous wireless networks is avoided in a channel hopping mode, whereby a data transmission success rate of the wireless sensor network is enhanced, thus enhancing reliability of data transmission.
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11 Claims
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1. A method for managing channel of a reception node included in a wireless sensor network, the method comprising:
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when a data frame is not received in at least one of a plurality of channels used in the wireless sensor network, counting the number of times of not receiving a data frame; when the number of times of not receiving a data frame from a first transmission node through a first channel among a plurality of channels is n, changing a state of the first channel into an unavailable state; and informing the first transmission node about the unavailable state of the first channel through a second channel among the plurality of channels; wherein the changing of the state of the first channel into the unavailable state comprises; changing the state of the first channel in a channel table stored in the reception node; and generating an unavailable channel bitmap through the channel table; and wherein the informing of the first transmission node about the unavailable state of the first channel comprises; after the state of the first channel is changed into the unavailable state, receiving a data frame from the first transmission node through the second channel; and informing the first transmission node about the unavailable state of the first channel by using an ACK frame with respect to the received data frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification