Time synchronization method and system for wireless sensor network

A time synchronization system, wireless sensor technology, applied in time division multiplexing system, synchronization device, wireless communication, etc., can solve the problems of large energy consumption, energy consumption, energy consumption, etc., to reduce energy consumption and reduce errors source, effect of improving accuracy

Active Publication Date: 2012-02-15
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

[0004] Time synchronization methods such as the flooding time synchronization protocol used in wireless sensor networks often need to establish a tree or hierarchical structure based on the entire network when performing time synchronization, and set a special root node or reference in the network for synchronization. node, which will bring additional power consumption
[0005] It can be seen

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  • Time synchronization method and system for wireless sensor network
  • Time synchronization method and system for wireless sensor network
  • Time synchronization method and system for wireless sensor network

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Embodiment Construction

[0096] figure 1 A time synchronization method in a wireless sensor network in an embodiment is shown, including the following steps:

[0097] Step S110, generating a synchronization data packet, and marking a sending time stamp in the synchronization data packet.

[0098] In this embodiment, in order to reduce energy consumption and quickly realize time synchronization, a sender-receiver one-way synchronization method is adopted, the parent node generates a synchronization data packet, and actively transmits the generated synchronization data packet to the corresponding child node.

[0099] Mark the current time of the parent node in the synchronization data packet, so as to tell the child node the time of the parent node when the synchronization data packet is sent. The synchronization data packet also includes a corresponding synchronization sequence number, and a node that has received multiple synchronization data packets can identify which synchronization data packet is ...

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Abstract

The invention discloses a time synchronization method for a wireless sensor network. The method comprises the following steps of: generating a synchronous data packet, and marking a transmission timestamp in the synchronous data packet; transmitting the synchronous data packet to a child node; receiving the synchronous data packet, and marking a receiving timestamp in the synchronous data packet; and compensating for the clock drift of the child node according to the transmission timestamp and the receiving timestamp in the synchronous data packet. By the time synchronization method and the time synchronization system for the wireless sensor network, clock drift compensation between a parent node and the child node is realized only by transmitting the synchronous data packet to the child node to realize regional time synchronization in a region formed by the parent node and the child node, and compared with conventional all-network time synchronization, the regional time synchronization reduces network energy consumption and also can avoid the energy consumption caused by crosstalk interference as much as possible.

Description

【Technical field】 [0001] The invention relates to wireless sensor network technology, in particular to a time synchronization method and system in the wireless sensor network. 【Background technique】 [0002] Time synchronization is the most basic requirement in wireless sensor networks. Most protocols and applications used in wireless sensor networks require time synchronization, such as data fusion, ranging positioning, compressed sensing, low-power MAC protocols, routing protocols, collaboration Both transmission and processing need to achieve time synchronization. Traditional time synchronization methods usually only focus on the improvement of synchronization accuracy, but do not conduct in-depth research on the influence of complex environmental conditions in the network environment on the time synchronization process. In the traditional time synchronization process, the Flooding Time Synchronization Protocol (FTSP for short) is usually used to realize the time synchro...

Claims

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Application Information

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IPC IPC(8): H04J3/06H04W56/00
CPCY02D30/70
Inventor 吕广燊于峰崎曹光明
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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