APPARATUS AND METHOD FOR COMMUNICATION IN WIRELESS SENSOR NETWORK
First Claim
1. A network management server of a wireless sensor network (WSN), the network management server comprising:
- a communication unit communicating with bridge systems connected with a plurality of radio frequency (RF) regions within a personal area network (PAN) composed of sensor nodes using the same wireless channel, in which radio signals of the sensor nodes within the PAN reach the bridge systems;
a search unit searching for a new channel to be used and an alternative bridge system which is to perform a channel change into the new channel based on information about the bridge systems upon receipt of an association failure report message from an error bridge system which is reported of an association failure from the RF region from among the bridge systems;
a channel change requesting unit sending a channel change request message to the found alternative bridge system; and
an information management unit adjusting channel information for the found alternative bridge system to the new channel and replacing information about sensor nodes connected to the found alternative bridge system with information about sensor nodes that are newly connected with the found alternative bridge system through the new channel.
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Accused Products
Abstract
Provided are a bridge system, a network management server, and communication methods at the bridge system and the network management server for efficient communication in a wireless sensor network (WSN). The communication method at the network management server includes communicating with bridge systems connected with a plurality of radio frequency (RF) regions within a personal area network (PAN) composed of sensor nodes using the same wireless channel, in which radio signals of the sensor nodes within the PAN reach the bridge systems, searching for a new channel to be used and an alternative bridge system which is to perform a channel change into the new channel based on information about the bridge systems upon receipt of an association failure report message from an error bridge system which is reported of an association failure from the RF region from among the bridge systems, sending a channel change request message to the found alternative bridge system, and adjusting channel information for the found alternative bridge system to the new channel and replacing information about sensor nodes connected to the found alternative bridge system with information about sensor nodes that are newly connected with the found alternative bridge system through the new channel.
22 Citations
10 Claims
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1. A network management server of a wireless sensor network (WSN), the network management server comprising:
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a communication unit communicating with bridge systems connected with a plurality of radio frequency (RF) regions within a personal area network (PAN) composed of sensor nodes using the same wireless channel, in which radio signals of the sensor nodes within the PAN reach the bridge systems; a search unit searching for a new channel to be used and an alternative bridge system which is to perform a channel change into the new channel based on information about the bridge systems upon receipt of an association failure report message from an error bridge system which is reported of an association failure from the RF region from among the bridge systems; a channel change requesting unit sending a channel change request message to the found alternative bridge system; and an information management unit adjusting channel information for the found alternative bridge system to the new channel and replacing information about sensor nodes connected to the found alternative bridge system with information about sensor nodes that are newly connected with the found alternative bridge system through the new channel. - View Dependent Claims (2, 3)
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4. A bridge system of a wireless sensor network (WSN), the bridge system comprising:
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a communication unit communicating with a radio frequency (RF) region within a personal area network (PAN) composed of sensor nodes using the same wireless channel, by using a particular channel; and an information management unit, upon receipt of a message requesting a change into a channel that is different form the particular channel from a network management server, registering information about the different channel and replacing information about sensor nodes connected through the particular channel with information about sensor nodes connected through the different channel, wherein the communication unit communicates with the sensor nodes connected through the different channel by using the different channel if the information about the different channel is registered. - View Dependent Claims (5)
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6. A communication method at a network management server of a wireless sensor network (WSN), the communication method comprising:
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communicating with bridge systems connected with a plurality of radio frequency (RF) regions within a personal area network (PAN) composed of sensor nodes using the same wireless channel, in which radio signals of the sensor nodes within the PAN reach the bridge systems; searching for a new channel to be used and an alternative bridge system which is to perform a channel change into the new channel based on information about the bridge systems upon receipt of an association failure report message from an error bridge system which is reported of an association failure from the RF region from among the bridge systems; sending a channel change request message to the found alternative bridge system; and adjusting channel information for the found alternative bridge system to the new channel and replacing information about sensor nodes connected to the found alternative bridge system with information about sensor nodes that are newly connected with the found alternative bridge system through the new channel. - View Dependent Claims (7, 8)
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9. A communication method at a bridge system of a wireless sensor network (WSN), the communication method comprising:
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communicating with a radio frequency (RF) region within a personal area network (PAN) composed of sensor nodes using the same wireless channel, by using a particular channel; and upon receiving a message requesting a change into a channel that is different form the particular channel from a network management server, registering information about the different channel and replacing information about sensor nodes connected through the particular channel with information about sensor nodes connected through the different channel, wherein the communication comprises communicating with the sensor nodes connected through the different channel by using the different channel if the information about the different channel is registered. - View Dependent Claims (10)
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Specification