Power management device and method of wireless sensor network
First Claim
1. A power management device of a wireless sensor network, for controlling a plurality of network nodes of the wireless sensor network, the plurality of network nodes comprising at least one relay node and a plurality of ordinary nodes, and each of the network nodes configured to selectively work in a fully-functional operating mode or a semi-functional operating mode, the power management device comprising:
- at least one processor;
a storage system; and
one or more programs that are stored in the storage system and are executed by the at least one processor, the one or more programs comprising;
a setting unit, which sets the at least one relay node to work in the fully-functional operating mode and sets the plurality of ordinary nodes to work in the semi-functional operating mode;
a detecting unit, which detects whether a power of the at least one relay node is lower than a predetermined threshold, confirms that the at least one relay node lacks power when the power of the at least one relay node is lower than the threshold, and collects power information and address information of ordinary nodes neighboring the at least one relay node which lacks power; and
a selecting unit, which selects a new relay node from among the neighboring ordinary nodes according to the power information and the address information of the neighboring ordinary nodes;
wherein the setting unit sets the new relay node to work in the fully-functional operating mode and sets the at least one relay node which lacks power to work in the semi-functional operating mode as an ordinary node;
wherein the setting unit further calculates a plurality of ratios between a plurality of distances and the powers of the neighboring ordinary nodes according to the power information and the address information of the neighboring ordinary nodes, the plurality of distances are between the neighboring ordinary nodes and the at least one relay node which lacks power, and the new relay node selected by the setting unit is one of the neighboring ordinary nodes which corresponds to the smallest of the plurality of ratios.
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Abstract
A power management device of a wireless sensor network includes a setting unit, a detecting unit and a selecting unit. The setting unit sets relay nodes to work in a fully-functional operating mode and sets ordinary nodes to work in a semi-functional operating mode. The detecting unit detects whether powers consumptions of multiple relay nodes are lower than a threshold, confirms that a relay node is lack of power when the power of the relay node is lower than a threshold and collects power information and address information of ordinary nodes. The selecting unit selects a new relay node according to the collected power information and address information of the ordinary nodes, and sets the low-power-reserves relay node as an ordinary node. A power management method of the wireless sensor network is also provided.
10 Citations
6 Claims
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1. A power management device of a wireless sensor network, for controlling a plurality of network nodes of the wireless sensor network, the plurality of network nodes comprising at least one relay node and a plurality of ordinary nodes, and each of the network nodes configured to selectively work in a fully-functional operating mode or a semi-functional operating mode, the power management device comprising:
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at least one processor; a storage system; and one or more programs that are stored in the storage system and are executed by the at least one processor, the one or more programs comprising; a setting unit, which sets the at least one relay node to work in the fully-functional operating mode and sets the plurality of ordinary nodes to work in the semi-functional operating mode; a detecting unit, which detects whether a power of the at least one relay node is lower than a predetermined threshold, confirms that the at least one relay node lacks power when the power of the at least one relay node is lower than the threshold, and collects power information and address information of ordinary nodes neighboring the at least one relay node which lacks power; and a selecting unit, which selects a new relay node from among the neighboring ordinary nodes according to the power information and the address information of the neighboring ordinary nodes; wherein the setting unit sets the new relay node to work in the fully-functional operating mode and sets the at least one relay node which lacks power to work in the semi-functional operating mode as an ordinary node; wherein the setting unit further calculates a plurality of ratios between a plurality of distances and the powers of the neighboring ordinary nodes according to the power information and the address information of the neighboring ordinary nodes, the plurality of distances are between the neighboring ordinary nodes and the at least one relay node which lacks power, and the new relay node selected by the setting unit is one of the neighboring ordinary nodes which corresponds to the smallest of the plurality of ratios. - View Dependent Claims (2, 3)
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4. A power management method of a wireless sensor network, the method applied to a power management device, the wireless sensor network comprising a plurality of network nodes, the plurality of network nodes comprising at least one relay node and a plurality of ordinary nodes, each of the network nodes configured to selectively work in a fully-functional operating mode or a semi-functional operating mode, the method comprising:
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setting the at least one relay node to work in the fully-functional operating mode and setting the plurality of ordinary nodes to work in the semi-functional operating mode; detecting whether a power of the at least one relay node is lower than a predetermined threshold; confirming that the at least one relay node lacks power when the power of the at least one relay node is lower than the threshold, and collecting power information and address information of ordinary nodes neighboring the at least one relay node which lacks power; selecting a new relay node according to the power information and the address information of the neighboring ordinary nodes; and setting the new relay node to work in the fully-functional operating mode and setting the at least one relay node which lacks power to work in the semi-functional operating mode as an ordinary node; wherein selecting the new relay node according to the power information and the address information of the neighboring ordinary nodes comprises; calculating a plurality of ratios between a plurality of distances and the powers of the neighboring ordinary nodes according to the power information and the address information of the neighboring ordinary nodes, wherein the plurality of distances are between the neighboring ordinary nodes and the at least one relay node which lacks power; and selecting one of the neighboring ordinary nodes which corresponds to the smallest of the plurality of ratios as the new relay node. - View Dependent Claims (5, 6)
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Specification