WIRELESS SENSOR NETWORK
First Claim
1. A wireless sensor network comprising:
- a plurality of sensor nodes connected linearly;
a sink node connected to the uppermost node among the sensor nodes;
a control server configured to transmit and receive data with respect to the sensor nodes and the sink node and to control operations thereof;
a gateway connected between the sink node and the control server to transmit and receive data; and
a plurality of relay gateways connected to the control server,wherein the plurality of the sensor nodes are divided into a predetermined number of subgroups, the sensor nodes located at the highest levels in the divided subgroups are designated as relay nodes, and each of the relay nodes is connected to each of the relay gateways.
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Abstract
Provided is a wireless sensor network including: a plurality of sensor nodes connected linearly; a sink node connected to the uppermost node among the sensor nodes; a control server; a gateway connected between the sink node and the control server to transmit and receive data; and a plurality of relay gateways. In the case where the plurality of the sensor nodes are divided into a predetermined number of subgroups, the sensor nodes located at the highest levels in the divided subgroups and which are connected to the relay gateways are designated as relay nodes. In the case where an amount of data stored in the relay node exceeds a predetermined threshold value, the relay node transmits the stored data through the connected relay gateway to the control server. Accordingly, in the case where the data of the sensor nodes are increased, it is possible to minimize a problem in that the increased data are lost during transmission.
20 Citations
6 Claims
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1. A wireless sensor network comprising:
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a plurality of sensor nodes connected linearly; a sink node connected to the uppermost node among the sensor nodes; a control server configured to transmit and receive data with respect to the sensor nodes and the sink node and to control operations thereof; a gateway connected between the sink node and the control server to transmit and receive data; and a plurality of relay gateways connected to the control server, wherein the plurality of the sensor nodes are divided into a predetermined number of subgroups, the sensor nodes located at the highest levels in the divided subgroups are designated as relay nodes, and each of the relay nodes is connected to each of the relay gateways. - View Dependent Claims (2, 3)
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4. A wireless sensor network comprising:
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a plurality of sensor nodes connected linearly; a sink node connected to the uppermost node among the sensor nodes; a control server; a gateway connected between the sink node and the control server to transmit and receive data; and a plurality of relay gateways connected to the control server, wherein the plurality of the sensor nodes are divided into a predetermined number of subgroups, the sensor nodes located at the highest levels in the divided subgroups are designated as relay nodes, and each of the relay nodes is connected to each of the relay gateways, and wherein in the case where a portion of the sensor nodes is error nodes in a communication-failed state, the relay node of lower subgroups located at lower levels of the subgroups in which the error nodes are included are converted to relay sink nodes, and the relay sink nodes transmit and receive data with respect to the control server through the connected relay gateway. - View Dependent Claims (5, 6)
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Specification