Method and apparatus for reducing sensor node dormancy power consumption

A technology for sensor nodes and power consumption, applied in transmission systems, electrical components, etc., can solve the problems of high sleep power consumption of sensor nodes, and achieve the effects of low cost, low implementation cost, and strong compatibility

Inactive Publication Date: 2009-02-11
BEIJING LOIT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method and device for reducing the power consumption of sensor nodes in sleep mode, so as to solve the problem of high power consumption in sleep mode of existing sensor nodes

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  • Method and apparatus for reducing sensor node dormancy power consumption
  • Method and apparatus for reducing sensor node dormancy power consumption
  • Method and apparatus for reducing sensor node dormancy power consumption

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Embodiment Construction

[0027] The main idea of ​​the present invention is to add an external clock module RTC (Real Time Clock, real-time clock), such as PCF8563 of PHILIPS, on the basis of existing sensor nodes. The external clock module has an extremely low operating current, only 0.25 microamperes, and the external clock module has the function of outputting an interrupt signal with a programmable cycle, and the pin of the external clock module that can generate an interrupt signal is connected to the interrupt of the CPU of the sensor node On the pin, even when the CPU is in the power-down state, the periodic interrupt signal generated by the external clock module can also trigger the CPU to enter the working state.

[0028] The specific implementation is as follows: the CPU of the sensor node initially sets the timing time of the external clock module as the cycle of the sensor node's periodic work. Before the sensor node CPU enters the dormant state, the external clock module counter is cleared...

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Abstract

The invention provides a method and a device for reducing the dormant power consumption of a sensor node. The device comprises a sensor node and further comprises an external clock module connected with the sensor node, wherein, the sensor node sends a control signal to the external clock module before entering into a dormant state; after receiving the control signal of the sensor node, the external clock module starts to time, and sends an interrupt signal to the sensor node after the time is fixed; and the sensor node receives the interrupt signal of the external clock module and then enters into a working state. The invention is achieved through adding the external clock module on the prior sensor network node; and the change to the prior system is less. In addition, the cost of the external clock module is low; and the influence on the cost of the prior sensor node is not large. Furthermore, after the external clock module is added, the dormancy power consumption of the sensor node can be reduced obviously.

Description

technical field [0001] The invention relates to an embedded system, in particular to a method and a device for reducing power consumption of sensor nodes. Background technique [0002] The wireless sensor network integrates various advanced technologies such as microelectronics technology, embedded computing technology, modern computer network technology, wireless communication technology, and distributed information processing technology. The wireless sensor nodes in the network can cooperate with each other for real-time monitoring, perception and The information of various environments or monitoring objects in the network coverage area is collected and processed. The processed information is sent wirelessly and transmitted to the observer in an ad hoc multi-hop manner. The wireless sensor network integrates the logical information world and the objective physical world, so as to realize the connection of the physical world, the computing world and the ternary world of hum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08
Inventor 樊勇黄孝斌魏剑平李英奇郑玉东
Owner BEIJING LOIT TECH
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