Time synchronization method of wireless sensor network

A wireless sensor and time synchronization technology, applied in synchronization devices, network topology, wireless communication, etc., can solve problems such as low error correction capability and high transmission error packet rate

Inactive Publication Date: 2020-03-13
TIANJIN UNIV
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to: aim at the deficiencies of the prior art, provide a kind of time synchronization method of the wireless sensor network, solve the problem that the synchronization beacon frame transmission error packet rate is higher in the wireless channel, based on the sensor node in the wireless sensor net

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Time synchronization method of wireless sensor network
  • Time synchronization method of wireless sensor network
  • Time synchronization method of wireless sensor network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0070] Certain terms are used, for example, in the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. As mentioned throughout the specification and claims, "comprising" is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0071] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", horizontal" etc. are based on the draw...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a time synchronization method of a wireless sensor network. A main node firstly generates a synchronous beacon frame; then, a low-complexity encoding scheme is preset accordingto the hardware configuration condition of the sensor node chip; error correction coding of the synchronous beacon frame is completed; the encoded synchronization information is periodically broadcasted; and after receiving the data packet, the slave node firstly selects a corresponding software or hardware decoding method for rapid decoding according to a preset encoding scheme, then identifiesand verifies a decoded data frame, finally realizes time synchronization with the master node according to a flooding time synchronization protocol, and sends a user data packet. According to the invention, the problem of high packet error rate of transmission of the synchronous beacon frame in the wireless channel is solved; based on hardware resource characteristics and a coding and decoding method of sensor nodes in a wireless sensor network, a coding scheme with low complexity and high error correction capability is realized by adopting coding, reliable transmission of synchronization information is ensured, and improvement of time synchronization precision and prolongation of synchronization survival time are facilitated.

Description

technical field [0001] The invention belongs to the technical field of wireless sensor networks, and in particular relates to a time synchronization method of wireless sensor networks. Background technique [0002] Wireless sensor network is a highly cross-integrated wireless communication technology, sensing technology and computer technology. It is a distributed system composed of a large number of sensor nodes with data acquisition, processing and wireless communication capabilities. It has been widely used in fields such as transportation and health care. As a typical distributed system, the wireless sensor network cannot guarantee the consistency of the startup time of each node, and the crystal oscillator is greatly affected by environmental factors such as temperature and humidity, and frequency offset and clock drift will occur, resulting in Even if the sensor nodes achieve time synchronization at a certain moment, then the node clocks will be biased. Therefore, in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04W56/00H04W84/18H04J3/06H04L1/00
CPCH04J3/0638H04L1/0061H04L1/0071H04W56/001H04W84/18
Inventor 陈为刚黄刚韩昌彩杨晋生
Owner TIANJIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap