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A Media Access Control Method Based on Gradient Partitioning

A media access control and gradient technology, applied in wireless communication, network topology, electrical components, etc., can solve the problems of not supporting target tracking applications well, ignoring the spatial correlation of sensor nodes, and improving the performance of media access control methods. Achieve the effects of improving the competition mechanism, reducing competition pressure, and reducing energy consumption

Inactive Publication Date: 2011-11-30
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, current media access control methods cannot support object tracking applications well; on the other hand, current media access control methods ignore the spatial correlation of sensor nodes
Spatial correlation means: in order to maintain a certain degree of redundancy and reliability, a large number of sensor nodes are usually deployed in the monitoring area. The nodes will monitor the event at the same time, and these sensor nodes will form the spatial correlation of the event monitoring, which will increase the delay and cause a lot of sending conflicts and energy consumption
The solution of this problem will lead to the improvement of the performance of the media access control method

Method used

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  • A Media Access Control Method Based on Gradient Partitioning
  • A Media Access Control Method Based on Gradient Partitioning
  • A Media Access Control Method Based on Gradient Partitioning

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Embodiment Construction

[0039] The terms and formulas used in this section are explained as follows:

[0040] Correlation radius and correlation area: The correlation radius is calculated by the sink node according to the statistical information of the current sensor network, and sent to the sensor nodes in the wireless sensor network. The correlation radius calculation method is as follows: first, the converging node calculates the number n of sensor nodes in the gradient 1 according to information such as the size of the gradient 1 range and the distribution density of sensor nodes in the network. Select M (the number of sensor nodes required to report in the application, M<=n) among the n sensor nodes as the reporting node (the sensor node that sends data to the sink node in the wireless sensor network), and use these M sensors The signal strength information collected by the nodes and the application's requirements for reconstruction errors are used to calculate the node distance r, and r at this...

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Abstract

The invention discloses a media access control method based on gradient division. The method takes into account the spatial correlation problem of sensor nodes in a wireless sensor network, and can reasonably select reporting nodes in an event source area to improve the reconstruction accuracy of target tracking applications. This method is an improvement of Sift MAC, adding an adaptive gradient partition algorithm to Sift MAC (dividing the distribution area of ​​sensor nodes according to the received signal strength, selecting sensor nodes with high received signal strength for data reporting, and improving the accuracy of target reconstruction ), the gradient contraction and expansion process and the control strategy of the sensor node spatial correlation, and improved the wireless channel competition process. The main design goal of this method is to control the reconstruction error of the target position. At the same time, this method has good flexibility and adaptability to the number of sensor nodes and topology changes, and can achieve low delay and low energy consumption.

Description

technical field [0001] The invention belongs to wireless sensor network technology, in particular to a medium access control (Medium Access Control, MAC) method, which is suitable for supporting target tracking based on wireless sensor networks, can better coordinate sensor nodes to compete for wireless channels, and effectively reduce The target reconstruction error has better adaptability to the dynamic changes of the network topology. Background technique [0002] Wireless sensor network refers to a multi-hop self-organizing network system composed of a large number of cheap micro sensor nodes deployed in the monitoring area and formed through wireless communication. Its purpose is to cooperatively perceive, collect and process the sensing objects in the network coverage area. information and send it to observers. A wireless sensor network system usually includes sensor nodes, a sink node (there is only one sink node in each sensor network) and a management node. The da...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08H04W84/18
Inventor 李国徽张珂珂张晓芳孙晓洁兰小玲章阳
Owner HUAZHONG UNIV OF SCI & TECH
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