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A Time Synchronization Method for Underwater Wireless Network Adaptable to Channel Environment

A channel environment and wireless network technology, applied in the field of underwater wireless network time synchronization that can adapt to the channel environment, can solve the problems of high precision and energy consumption, and can not be well applied to underwater wireless networks, etc.

Active Publication Date: 2020-10-27
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

However, the algorithm consumes a lot of energy to achieve the required accuracy, which is also a common limitation of existing synchronization algorithms, which makes them not well suitable for resource-constrained underwater wireless networks.

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  • A Time Synchronization Method for Underwater Wireless Network Adaptable to Channel Environment
  • A Time Synchronization Method for Underwater Wireless Network Adaptable to Channel Environment
  • A Time Synchronization Method for Underwater Wireless Network Adaptable to Channel Environment

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] In order to overcome the problem that the accuracy and energy consumption of the existing time synchronization method cannot meet the demand and the lack of fit for the underwater wireless network, the present invention provides a high-precision and low-energy-consumption time synchronization method suitable for the underwater wireless network, which can Avoid conflicts, the number of single synchronous information interactions is small, the time is short, and the interaction information is fully utilized in the process of information interaction and compensated by prediction to achieve the effect of higher accuracy in the long run, so that the underwater nodes use less The number of times of information interaction completes high-precision time synchronization.

[0034] In the present invention, the reference node is called the master node, and ...

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Abstract

The invention provides an underwater wireless network time synchronization method capable of adapting to a channel environment. During synchronization, the slave node detects whether a channel is available or not; and if the channel is available, a timestamp is stamped on a synchronization request message to be sent and the synchronization request message is immediately sent to avoid the influenceof sending delay and access delay on the synchronization precision, and after the master node receives the synchronization request message, the synchronization message is sent to the slave node according to requirements and stamping the timestamp on the message. According to the invention, the energy consumption can be greatly reduced on the premise of maintaining higher precision.

Description

technical field [0001] The invention relates to a time synchronization method suitable for underwater wireless networks, belongs to the technical field of self-organizing wireless sensor networks, and is suitable for underwater acoustic networks and various wireless self-organizing sensor network systems. Background technique [0002] Time synchronization is a supporting technology and a necessary prerequisite for wireless sensor networks. In a distributed system such as wireless sensor networks, functions such as power management, data fusion, location tracking, security protocols, and transmission scheduling require high time synchronization accuracy. , so time synchronization between different nodes is a problem that cannot be ignored. In a wireless sensor network, each sensor node has its own local time, which is determined by the crystal oscillator and counter inside the node. However, small differences in crystal oscillator manufacturing materials and manufacturing pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/06H04W84/18H04B13/02
CPCH04B13/02H04J3/0661H04J3/0682H04W84/18Y02D30/70
Inventor 申晓红孙旋迪姚海洋
Owner NORTHWESTERN POLYTECHNICAL UNIV
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