Time quasi-synchronization method for centerless distributed network

A distributed network, time synchronization technology, applied in the field of communication, can solve the problem of large influence on the synchronization accuracy of remote nodes

Inactive Publication Date: 2019-07-05
博频云彩(北京)科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Method (3) relies on the master control node, and the synchronization accuracy of the remote node is greatly affected by the accumulated error;

Method used

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  • Time quasi-synchronization method for centerless distributed network
  • Time quasi-synchronization method for centerless distributed network
  • Time quasi-synchronization method for centerless distributed network

Examples

Experimental program
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Effect test

Embodiment approach

[0025] One is to manually issue the Time_Synch command for time synchronization;

[0026] The second is every synchronization cycle. Each node in the distributed network performs two-way time information interaction with its surrounding neighbor nodes to calculate the time deviation with the neighbor nodes. The length of the synchronization cycle is determined according to the stability of the crystal oscillator and the synchronization accuracy requirements;

[0027] Method 1, the specific process is as attached to the manual figure 2 As shown: First, let a certain node in the decentralized distributed network be the temporary leader of the time synchronization task, that is, the protagonist. When time synchronization is required, you can manually issue the Time_Synch command to wake up the nodes around it first. After receiving the broadcast time interaction information issued by the temporary group leader node, each other node starts the time calibration work, uses the time...

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Abstract

The invention discloses a time quasi-synchronization method for a centerless distributed network. The core idea comprises the following two points: step, 1, a time synchronization command is issued through a temporary group head, the temporary group first awakens surrounding nodes, other nodes start timing work after receiving broadcast type time interaction information issued by the temporary group head node, the time of the group head node is taken as reference time, and the time information of the group head node is written into each node; and step 2, in each synchronization period of the operation process of the network, each node in the distributed network performs bidirectional time information interaction with neighbor nodes around the node to calculate the time deviation with the neighbor nodes, and then time adjustment is implemented step by step.

Description

[0001] Technical field: [0002] The invention relates to a time quasi-synchronization technology of a non-central distributed network, and belongs to the technical field of communication. [0003] Background technique: [0004] In a wireless sensor network, a two-level networking scheme is generally adopted, and the sensor nodes are only used as data collectors, and the data is transmitted to the gateway for storage and further processing. The disadvantage of this method is: when the gateway fails, all nodes connected to this gateway will not be able to communicate normally, the network robustness is poor, the configuration is complex, and the threshold for maintenance and use is high. [0005] Moreover, sensor nodes usually use batteries with very limited power to provide energy. The limited energy will inevitably lead to limited communication capabilities and short communication distances. [0006] As a low-power, long-distance wireless communication technology, LoRa is bas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04W84/18
CPCH04W56/001H04W56/002H04W84/18
Inventor 程强
Owner 博频云彩(北京)科技有限公司
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