Clustering time synchronization method combining topological maintenance

A technology of time synchronization and clustering, which is used in synchronization devices, electrical components, wireless communication, etc.

Active Publication Date: 2017-06-06
SHANGHAI JIAO TONG UNIV +1
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  • Abstract
  • Description
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Problems solved by technology

[0004] The purpose of the present invention is to provide a clustering time synchronization method combined with topology maintenance in order to overcome the defects of the above-mentioned prior art, which has excellent synchronization performance and can well s...

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  • Clustering time synchronization method combining topological maintenance
  • Clustering time synchronization method combining topological maintenance
  • Clustering time synchronization method combining topological maintenance

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specific Embodiment

[0138] The simulation environment uses The Opportunistic Network Environment simulator (The Opportunistic Network Environmentsimulator). ONE simulation is developed and maintained by Aalto University and Technical University of Munich and provides open source. The ONE simulator is developed by the Java language and based on a discrete-time simulation engine. During simulation, the engine will be responsible for updating modules to realize the simulation function. Its functions include the dynamic model of the mobile network, the routing and communication between nodes, and the display of the communication and transmission status of nodes in the network through the GUI interface. In addition, the ONE simulator can import the movement data of the real scene and generate the movement report.

[0139]The simulation network scale is from 10 nodes to 50 nodes, and the nodes are randomly arranged. The clock crystal frequency of the nodes in the simulation is still 1ppm, and the node ...

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Abstract

The invention relates to a clustering time synchronization method combining topological maintenance. The method comprises the steps that in the election stage, the system selects a node of the maximum connectivity to act as a network root node; in the clustering stage, network clustering is completed with the network root node acting as the start under the scene of network event asynchronization and equipping a directional antenna, and network initial synchronization is also completed; in the synchronization stage, the synchronization effect is stabilized through intra-cluster and inter-cluster synchronization; and in the maintenance stage, maintenance strategy analysis is performed on mobile network accessing and network withdrawing of the node. Compared with the methods in the prior art, the clustering time synchronization method has excellent synchronization performance and can greatly solve the problem of clustering synchronization based on a beam forming antenna, the synchronization efficiency can be effectively enhanced by adopting an inter-cluster synchronization priority policy, and the influence caused by dynamic network topology can be greatly adopted by combining topological maintenance.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a clustering time synchronization method combined with topology maintenance. Background technique [0002] The wireless Ad Hoc network is a special-purpose network originally originated in the field of military research in the United States. It can realize the temporary interconnection of multiple mobile terminals without a central infrastructure, and solve the problem of rapid construction of mobile communication networks. The Ad Hoc network is flexible and fast, and has gradually developed from military communication research to civilian communication. It is widely used in field detection, mobile target exploration, and temporary communication network construction after earthquakes and floods. [0003] The nodes in the Ad Hoc network can move arbitrarily, and the wireless propagation conditions are constantly changing, resulting in changes in the communication li...

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Application Information

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IPC IPC(8): H04W56/00
CPCH04W56/001H04W56/0015
Inventor 丁良辉叶天源程友祥田龙王停朱永虎詹浩
Owner SHANGHAI JIAO TONG UNIV
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