Energy-saving medium access control method in underwater acoustic network

A medium access control, underwater acoustic network technology, applied in the direction of reducing energy consumption, ultrasonic/acoustic wave/infrasonic wave transmission system, transmission system, etc., can solve the problem of battery energy consumption of sensor nodes, large data packet propagation delay, and data packet collision rate Advanced problems, to achieve the effect of saving energy consumption, reducing the number of retransmissions, and reducing the collision rate

Inactive Publication Date: 2009-10-28
魏昕
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Problems solved by technology

However, due to the large propagation delay of data packets in the underwater acoustic network and the limited network capacity, the collision rate of data packets in the unde

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  • Energy-saving medium access control method in underwater acoustic network
  • Energy-saving medium access control method in underwater acoustic network
  • Energy-saving medium access control method in underwater acoustic network

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Embodiment Construction

[0029] The technical solutions of the present invention will be further described below in conjunction with the drawings and embodiments.

[0030] figure 1 is a network topology instance. exist figure 1 In , the nodes within the sending range of each node become its neighbor nodes. There are five nodes A, B, C, D, and E in the initial setting, and the solid circle represents the sending range of each node. It can be seen from the figure that the neighbor nodes of A are B, C and D; the neighbor nodes of B are A, C, D and E; the neighbor nodes of C are A and B; the neighbor nodes of D are A and B; The neighbor node is B. F is a newly added node after a period of time. In order to distinguish it from the existing nodes in the initial network, its sending range is represented by a dotted circle. After joining the network, its neighbor nodes are B and E. Each node establishes and maintains a wake-up time table, which includes the following items: the sending time of the data p...

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Abstract

The invention discloses an energy-saving medium access control method in an underwater acoustic network and aims at solving the problems of ultrahigh transmission collision rate and ultrahigh energy consumption of data packets in the underwater acoustic network. The method comprises the following steps, dividing a time shaft into cycle periods with equal lengths and establishing a network topology by initialization to realize the synchronization between nodes under the condition that transmission time delay between the nodes is not known so that various nodes at data sending and receiving stages are in alarm states only in special time to send or receive the data packets and are in rest states in most time; and meanwhile, designing a collision avoidance measure, a new node adding treatment measure and a failure node treatment measure. The method can greatly save the energy consumption of the network, prolongs the service life of the network, can lower the collision rate and can effectively bring the dynamic change of the network topology by the change of the underwater environment or the movement, the damage and the updating of the nodes.

Description

technical field [0001] The invention relates to a medium access control method, in particular to a medium access control method in an underwater acoustic network. Background technique [0002] The underwater acoustic network is mainly used for data collection, sampling, environmental monitoring, near-shore detection, disaster prevention, tsunami warning, navigation assistance, distributed tactical monitoring and mineral survey in the ocean. Because radio waves can only propagate at extremely low frequencies (30-300Hz) underwater, they are easily affected by scattering. Therefore, the nodes of the underwater acoustic network usually use sound waves for wireless communication. Compared with radio channels, underwater acoustic channels have the characteristics of lower data transmission rate, limited frequency band resources, and higher bit error rate. At the same time, sensor nodes distributed underwater usually carry batteries with very limited energy. How to efficiently u...

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Application Information

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IPC IPC(8): H04L12/28H04B11/00H04B13/02
CPCY02D30/70
Inventor 魏昕赵力余华邹采荣王青云
Owner 魏昕
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