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Directional underwater acoustic network power control method

An underwater acoustic network and power control technology, applied in power management, space transmit diversity, radio transmission systems, etc., can solve the problems of low channel space reuse rate and interference with marine life, etc.

Inactive Publication Date: 2017-03-29
TIANJIN UNIV
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Problems solved by technology

However, the existing UASNs power control method uses omnidirectional communication nodes—the communication range of nodes is a sphere, and the channel space reuse rate is low, which fails to improve network throughput while avoiding interference with marine life.

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  • Directional underwater acoustic network power control method

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Embodiment Construction

[0015] The present invention proposes a directional underwater acoustic network power control method: the directional communication of nodes can be realized by deploying directional underwater acoustic transducers. The emitted sound energy of the directional transducer is mainly concentrated in a certain direction in space, and there is only a small amount of sound energy in the other directions. The beam pattern is as follows: figure 1 . First, the source node performs neighbor discovery, obtains the channel state information and determines the sending direction, so as to improve the channel spatial multiplexing rate; according to the channel state information, the node performs power control to avoid interfering with marine life. by figure 2 Take the network topology as an example. The six nodes are all within the omnidirectional radiation range of each other. 1 , S 2 respectively to D 4 , D 2 Send data. The communication time is divided into time slots, the source nod...

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Abstract

The invention relates to a directional underwater acoustic network power control method. The directional underwater acoustic network power control method comprises the following steps: a source node performs neighbor discovery, and sends an RTS control packet in all directions through the maximum power; the beam width alpha and the self transmission power are included; after receiving the RTS, all nodes in the irradiation range of the source node calculate the channel gain h, and broadcast a CSI control packet in all directions; after receiving the CSI, the source node calculates the azimuthal angles and the elevation angles of various destination nodes corresponding to the source node; a channel state matrix H and a neighbor node orientation matrix L are respectively established; the source node performs environmental perception, judges whether a marine organism exits in the irradiation range or not, and judges which node can be interfered in a communication process according to the relative angles of the destination nodes and other neighbor nodes and the beam width alpha; according to an environmental perception result, a utility function is defined for each node at first; power is distributed to the node by solving a power value for enabling the utility function to be maximum; the power value is corrected; and, a data packet is sent in a destination node alignment manner.

Description

technical field [0001] The invention relates to a node power control method in an underwater sensor network. Background technique [0002] In recent years, Underwater Acoustic Sensor Networks (UASNs) have been widely used in economic, military and other fields. Due to the slow attenuation of the UASNs channel and the characteristics of long delay and low bandwidth, the spatial reuse rate of the channel is low, that is, when an omnidirectional radiating node is communicating, other nodes within its radiation range will monitor the channel occupation and delay. send. In addition, UASNs share the scarce underwater acoustic spectrum resources with marine organisms, and the spectrums used by the two overlap to a large extent. Achieving bio-friendly communication is also a serious challenge for UASNs research. In this paper, a power control algorithm is designed based on the use of directional transducers, which can effectively reduce the interference between nodes, improve the...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04B13/02H04W52/24H04W52/32
CPCH04B7/0617H04B7/0626H04B13/02H04W52/241H04W52/322
Inventor 金志刚马莹莹罗咏梅
Owner TIANJIN UNIV
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