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Underwater sensor network media access control method based on motion prediction

A medium access control and underwater sensor technology, applied in electrical components, wireless communication, etc., can solve problems such as data packet collision and communication efficiency, and achieve the effect of improving network throughput, increasing utilization rate, and improving network communication efficiency

Inactive Publication Date: 2014-04-09
TIANJIN UNIV
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Problems solved by technology

[0005] In order to improve the problems of data packet collision and low communication efficiency caused by node movement in the UWSN medium access control method, the present invention proposes a combination of application motion prediction and channel reservation mechanism, which can adaptively adjust the reservation according to the change of the distance between nodes The method of slot length improves communication efficiency and improves network throughput

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  • Underwater sensor network media access control method based on motion prediction
  • Underwater sensor network media access control method based on motion prediction
  • Underwater sensor network media access control method based on motion prediction

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Embodiment Construction

[0026] Before the specific embodiment of the present invention is described, first set forth the basic theory of floating body motion and linear prediction:

[0027] The movement of underwater nodes is mainly affected by ocean waves, which can be regarded as gravity waves, and the movement of water particles has the law of back-and-forth oscillating motion. The linear wave theory is used to analyze the gravity wave, ignoring the nonlinear factors under the boundary conditions, and simplifying the motion of the ocean wave to a regular traveling wave. Its characteristic parameters are:

[0028] η = h 2 cos ( kx - ωt ) - - - ( 1 )

[0029] Among them, water wave height: h, wave number: k=2π / λ, wavelength: λ=gT / 2π, period: T, wave frequency: ω=2π / T

[0030] ...

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Abstract

The invention belongs to the technical field of underwater sensor networks and provides a media access control method based on motion prediction. Four kinds of messages of RTS, CTS, DATA and ACK are used for communication, all nodes broadcast signals randomly, according to received signal transmission time and known transmission speed, each node computes the distance between the node and an adjacent node, the obtained distance between the node and the adjacent node is broadcast, accordingly, each node records the distance values between all of the nodes, and a distance matrix D is used for representation; through the current speed and the previous motion speed of the nodes, the motion speed in the future of the nodes is subjected to linear prediction, then the distance values in the distance matrix D are updated, the maximum value in the distance matrix D is obtained, and reservation slot length is computed; and communication is carried out through a sub-slot reservation transmitting mechanism. On the basis that communication conflict between the nodes is avoided, slot resources are fully used, and channel using rate is improved.

Description

technical field [0001] The present invention relates to the field of underwater sensor network (Underwater Sensor Networks, UWSN) communication technology, in particular to a media access control method for realizing collision avoidance and efficient communication between sensor nodes based on motion prediction. Background technique [0002] Underwater sensor network (UWSN) has become an ideal tool for exploring and observing the ocean, and has great applications in the following areas: oceanographic data collection, pollution monitoring, underwater exploration, disaster avoidance, rescue navigation, Military strategic observation applications, mineral resource exploration, earthquake monitoring, submarine oil pipeline leakage monitoring, underwater building assistance, and ecological monitoring, etc. However, the characteristics of the marine environment have brought many difficulties to the construction of sensor networks, such as: power consumption, long and variable tran...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08
Inventor 金志刚田志辉苏毅珊
Owner TIANJIN UNIV
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