Wireless sensor network system
First Claim
1. A sensor terminal which constitutes nodes of a wireless sensor network system together with a management terminal and conducts wireless communication based on an instruction from the management terminal,wherein the sensor terminal transmits a join request to the management terminal at a first transmission power via an existing node when the sensor terminal participates in the network, and, upon receiving the instruction to make direct connection to the management terminal or a specific node having a low traffic load at a second transmission power higher than the first transmission power from the management terminal, the sensor terminal transmits data to the management terminal or the specific node at the second transmission power, andwherein, if the sensor terminal is not available for the second transmission power, the sensor terminal connects to another sensor terminal available for the second transmission power as subordinate thereof, at the first transmission power based on an instruction from the management terminal.
1 Assignment
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Accused Products
Abstract
A wireless sensor network system includes: sensor terminals and a management terminal. A sensor terminal sends a join request at a first transmission power; and the management terminal calculates the traffic load of nodes on the reception path of the join request. If the number of hops and the traffic load are both within respective permissible ranges, the management terminal sets the reception path as the communication route of the sensor terminal. If the number of hops and/or the load is not within the permissible rage, the management terminal reconstructs the communication path by outputting an instruction to the sensor terminal to make direct connection to the management terminal or a specified node with a low traffic load, at a second transmission power greater than the first transmission power. When receiving the instruction, the sensor terminal transmits to the management terminal or the specified node at the second transmission power.
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Citations
3 Claims
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1. A sensor terminal which constitutes nodes of a wireless sensor network system together with a management terminal and conducts wireless communication based on an instruction from the management terminal,
wherein the sensor terminal transmits a join request to the management terminal at a first transmission power via an existing node when the sensor terminal participates in the network, and, upon receiving the instruction to make direct connection to the management terminal or a specific node having a low traffic load at a second transmission power higher than the first transmission power from the management terminal, the sensor terminal transmits data to the management terminal or the specific node at the second transmission power, and wherein, if the sensor terminal is not available for the second transmission power, the sensor terminal connects to another sensor terminal available for the second transmission power as subordinate thereof, at the first transmission power based on an instruction from the management terminal.
Specification