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Wireless sensor network time synchronization method

A wireless sensor and network time technology, applied in the direction of synchronization device, wireless communication, advanced technology, etc., can solve the problem of ineffective node energy saving, low synchronization accuracy, and poor accuracy and energy consumption to meet the special needs of wireless sensor networks Questions such as requirements

Inactive Publication Date: 2015-07-15
ANHUI POLYTECHNIC UNIV
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Problems solved by technology

[0007] However, in the above-mentioned inventive methods, the prediction results are used to correct their own logic time, and the synchronization accuracy is not high. At the same time, the nodes need to perform idle listening and a large number of calculations, which cannot effectively save the energy of the nodes. Can not well meet the special requirements of wireless sensor networks

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  • Wireless sensor network time synchronization method
  • Wireless sensor network time synchronization method
  • Wireless sensor network time synchronization method

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Embodiment Construction

[0084] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0085] The inventor finds through research: for such as figure 1 The shown schematic diagram of the wireless sensor network model of the distributed network system structure includes a central node and n terminal nodes, in which the central node is connected to a PC and has a continuous and stable power supply; the terminal node and the central node are connected through a wireless network, It is powered by batteries, but there is a problem of energy limitation. This determines that time synchronization needs to save energy as much as possible. Therefore, the requirements of wireless sensor networks for time sy...

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Abstract

The invention provides a wireless sensor network time synchronization method which comprises the following steps that (1) after a central node is initialized, standard source second pulse time information received from standard source equipment is broadcast to terminal nodes in the whole network; after the terminal nodes are initialized, the standard source second pulse time information is received; then steps (2) and (3) are respectively executed to the central node and the terminal nodes; (2) the standard source second pulse of the central node predicts and self-calibrates so as to update the standard source pulse time, responds to the requests of the terminal nodes and broadcasts the updated standard source pulse time to the terminal nodes of the whole network; and (3) the terminal nodes self-wake up, predict and calibrate synchronously. According to the wireless sensor network time synchronization method, the vacant detection energy consumption of the terminal nodes can be effectively reduced, the time synchronization execution frequency of the terminal nodes is reduced, the sleeping time of the terminal nodes is increased, so that the synchronization precision is high, the interference of a user is not needed, good synchronization precision and energy-saving effect are realized, and the time synchronization requirements of the low power consumption and high precision of the wireless sensor network can be well met.

Description

technical field [0001] The invention relates to the technical field of wireless sensor networks, in particular to a time synchronization method for wireless sensor networks. Background technique [0002] Wireless Sensor Networks (WSN) is an ad hoc network composed of a large number of sensor nodes distributed in the monitoring area in the form of wireless communication. Through the mutual cooperation between nodes, various environmental information in the monitoring area are collected, processed, and fused, and transmitted to the base station through the main node route, so that users can perform operations such as viewing and controlling through satellites or the Internet. [0003] Wireless sensor network technology has broad application prospects and has been widely used in military, environment, biology, medical care, space exploration, climate monitoring, disaster relief and other fields. As an important supporting technology of wireless sensor network, time synchroniza...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00
CPCY02B60/50Y02D30/70
Inventor 陈其工王冠凌江明王俊杰
Owner ANHUI POLYTECHNIC UNIV
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