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A multi-hop time synchronization method based on beacon network

A time synchronization and beacon technology, applied in the field of communication, can solve the problems of random delay of channel access, useless energy consumption, accumulation of synchronization errors, etc., to improve synchronization accuracy and stability, reduce synchronization hops, and improve accuracy. Effect

Active Publication Date: 2022-03-11
CHONGQING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

[0005] Using the flooding time synchronization method, although the energy consumption is reduced, it does not eliminate the random delay of channel access and the error caused by the timestamp mark. In a multi-hop network, redundant synchronization paths will be generated, resulting in useless energy consumption. , it will also generate multi-hop synchronization error accumulation, which will affect the accuracy

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  • A multi-hop time synchronization method based on beacon network
  • A multi-hop time synchronization method based on beacon network
  • A multi-hop time synchronization method based on beacon network

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Embodiment Construction

[0036] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0037] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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Abstract

The invention relates to a multi-hop time synchronization method based on a beacon network, which belongs to the technical field of communication. The self-organizing network of sensor nodes forms a multi-level tree network. The beacon network is used. The central coordinator dynamically allocates time slots according to the network scale, and then uses hardware to mark time stamps. By flooding time synchronization, it will carry synchronization information After the node receives the beacon frame, it calculates the node quality Q from the time deviation information and synchronization hop information in the beacon of the previous node. When Q satisfies a certain relationship, it can be selected for synchronization. The least square linear regression estimates the phase offset and frequency offset. After the synchronization is completed, the broadcast of the beacon frame is carried out in the time slot specified by the CCO. The invention eliminates the uncertain time delay caused by channel access and system data queuing, avoids network conflicts, reduces synchronization redundant paths, reduces energy consumption, reduces the average number of multi-level synchronization hops, and improves synchronization accuracy and stability sex.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a multi-hop time synchronization method based on a beacon network. Background technique [0002] A wireless sensor network consists of multiple sensor nodes capable of transmitting the data they acquire from the environment to a base station. Due to their inherent characteristics, such as limited energy resources, storage resources, computing resources, and bandwidth, the design of wireless sensor network protocols and algorithms is usually subject to very strict constraints. [0003] High-precision time synchronization is crucial for the stable operation and collaboration of wireless sensor networks. More and more applications need to use sensor networks and deploy them in various environments, and the application scenarios are gradually developing towards large-scale, dense, multi-hop networks that require real-time communication. However, most of them It is a resource-co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/06H04W56/00H04W72/04
CPCH04W4/06H04W56/00H04W72/0446Y02D30/70
Inventor 苏法通董彬叶俊杰
Owner CHONGQING UNIV OF POSTS & TELECOMM
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