A Self-Location Method for Nodes in Underwater Acoustic Sensor Networks
A technology of sensor nodes and underwater acoustic sensors, applied in network topology, services based on location information, services based on specific environments, etc., can solve problems such as high equipment requirements, easy conflicts, poor concealment of algorithm communication, etc., and increase information dissemination , conflict avoidance, powerful effects
Active Publication Date: 2021-02-02
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
At the same time, there are also many problems in underwater acoustic positioning: high requirements for all node equipment, low concealment, easy conflicts, and positioning algorithms are limited to single hops, etc.
In this case, the equipment requirements of multiple anchor nodes are relatively high, or the equipment requirements of the nodes to be tested are high. At the same time, some existing algorithms have poor communication concealment and high requirements for node distribution rules. The problem
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[0065] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:
[0066] Self-localization method of underwater acoustic network based on beam switching
[0067] 2D: if figure 1 , in a circular sensor anchor point, emits a narrow beam of fixed energy at a certain angle, such as figure 2 Rotate the launch angle, ie, rotate the narrow beam through 360 degrees.
[0068] The transmitted narrow beam contains the coordinates of the anchor node and the current transmission angle.
[0069] When the sensor node receives the narrow beam and records the angle, not only the difference between the transmitted energy and the received energy can be used to calculate the distance to the anchor node.
[0070] TL=n*10lgR+α*R (1)
[0071] TL is the propagation loss, n is a constant, and takes different values under different propagation conditions, R is the propagation distance, and α is the absorption coefficient, which can be obtained fr...
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The present invention relates to a self-positioning method for nodes in an underwater acoustic sensor network. A single anchor node is used to transmit a narrow beam of fixed energy, and beam switching is used to transmit the narrow beam to perform self-positioning, wherein: the self-positioning based on beam switching, Through the information interaction between the anchor node and the ordinary node, the information return of the ordinary node is completed in a multi-hop manner, and the aloha with delay is used to reply in the same interval. In the present invention, only the nodes within the beam reply, which avoids collisions to a large extent. And only the nodes within the beam reply, thus avoiding collisions to a large extent. The omnidirectional wave passes through the transducer and becomes a narrow beam, the information transmission is greatly increased, and the communication distance of the original multi-hop can be realized with a single hop. Only one anchor node is required, and the equipment requirements for the anchor node are high, while the equipment requirements for other nodes are not high. Good concealment, narrow beam conditions make communication more concealed.
Description
technical field [0001] The invention belongs to the technical field of underwater sensor networks, and relates to a node self-positioning method of an underwater acoustic sensor network, which is suitable for a self-positioning scheme of an underwater acoustic multi-hop sensor network starting from a single anchor node. Background technique [0002] The full name of UASN is Underwater Acoustic Sensor Network, which is an underwater acoustic sensor network, which is widely used in civil activities, such as marine resource development, environmental exploration, etc.; and military tasks, such as surveillance, anti-submarine detection, anti-mine missions, etc., are of great significance and research value. Since the premise of UASN function is that it can know the location of its own sensor nodes, the self-location research of underwater acoustic sensor network is an important research topic. In the wireless sensor network (WSN) on the ground, positioning is generally realized...
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IPC IPC(8): H04W4/029H04W4/38H04W40/22H04W64/00H04W84/18
CPCH04W40/22H04W64/006H04W84/18H04W4/029H04W4/38
Inventor 何轲张钦政赵瑞琴姚海洋
Owner NORTHWESTERN POLYTECHNICAL UNIV