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An event-driven sensor data transmission method for remote state estimation

A data transmission method and state estimation technology, applied in the field of sensor data transmission strategy, can solve the problems of increase, wireless channel change, affecting the overall performance of the dynamic system, etc., and achieve the effect of reducing the estimation performance and prolonging the service life.

Active Publication Date: 2018-11-27
湖州华翼环保科技有限公司
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Problems solved by technology

At the same time, the capacity of the wireless channel may change with the external environment, and the time-varying channel capacity may affect the overall performance of a dynamic system
Of course, you can choose not to transmit data from the sensor, but in this case, the estimation error of the underlying parameters that rely on the raw sensor measurement data may increase to an unacceptable level

Method used

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  • An event-driven sensor data transmission method for remote state estimation
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Embodiment Construction

[0021] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0022] The invention discloses an event-driven sensor data transmission strategy for remote state estimation, so as to well balance estimation error and transmission rate.

[0023] The threshold of the event-driven trigger mechanism is calculated offline:

[0024] Through mathematical modeling, the following discrete random system is obtained:

[0025] x k+1 =Ax k +w k (1)

[0026] the y k =Cx k +v k (2)

[0027] In formulas (1) and (2), k is the discrete-time index, x k+1 is the state variable of the discrete stochastic system at time k+1, x k is the state variable of the discrete stochastic system at time k, y k is the measurement information of the sensor at time k; A and C are known, respectively, the transfer matrix and output matrix of the discrete random system; w k is the process noise of the discrete stochastic system at time...

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Abstract

The invention discloses an event-driven sensor data transmission strategy for remote state estimation. The event-driven detector determines whether the measurement information of the sensor is sent to the remote state estimator. The invention can reduce the usage rate of the wireless channel by reducing the frequency of sending measurement information by the sensor, without significantly reducing the estimation performance of the Kalman filter, and at the same time prolong the service life of the battery of the sensor.

Description

technical field [0001] The invention relates to an event-driven sensor data transmission strategy for remote state estimation, belonging to the field of communication information processing. Background technique [0002] In the past decade, wireless sensor network technology has developed rapidly. It has been widely used in industrial process, smart building, healthcare and battlefield monitoring. During these applications, sensors and estimators in WSNs communicate through wireless networks. Wireless sensors typically have limited battery capacity compared to conventional wired sensors, and replacing a depleted battery is often costly or impossible. At the same time, the capacity of the wireless channel may change with the external environment, and the time-varying channel capacity may affect the overall performance of a dynamic system. Of course, it is possible to choose not to transmit data from the sensor, but in this case, the estimation error of the underlying param...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/10H04W28/02H04W72/12
CPCH04W24/10H04W28/0215H04W28/0252H04W72/1221H04W72/54
Inventor 彭力李云骥
Owner 湖州华翼环保科技有限公司
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