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Large-scaled wireless sensor network synchronizer based on frequency offset bidding and dynamic topology

A wireless sensor and dynamic topology technology, applied in wireless communication, synchronization device, network topology, etc., can solve the problems of practical application difficulties, nodes are not allowed to be moved, etc.

Inactive Publication Date: 2015-11-04
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When this type of protocol is running, nodes are not allowed to be moved, and when the network needs to be expanded, the entire protocol must be restarted, which brings difficulties to practical applications

Method used

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  • Large-scaled wireless sensor network synchronizer based on frequency offset bidding and dynamic topology
  • Large-scaled wireless sensor network synchronizer based on frequency offset bidding and dynamic topology
  • Large-scaled wireless sensor network synchronizer based on frequency offset bidding and dynamic topology

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Embodiment Construction

[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] The invention is a large-scale wireless sensor network synchronizer based on frequency offset bidding and dynamic topology. When synchronizing, a node selects a parent node with a stable clock frequency and a small number of synchronous hops for synchronization, thereby achieving the effect of suppressing the accumulation of multi-hop errors. And a strategy of combining fast and slow synchronization is adopted to meet the requirements of two performance indicators of synchronization accuracy and convergence time in the network. The node uses the hop number information to dynamically select the parent node, which can meet the time synchronization requirements of the dynamic topology network, and has good resistance to destruction and scalability.

[0044] The intelligent route selection synchronizer of the present invention goes...

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Abstract

The invention discloses a large-scaled wireless sensor network synchronizer based on frequency offset bidding and dynamic topology. After a network region clustering mechanism is adopted for reducing a node synchronous hop number, the node selects a parent node with stable clock frequency and few synchronous hops for synchronization, and effects of restraining ambulation of multiple hop errors can be achieved; a fast and slow synchronization combination strategy is adopted for meeting requirements on two performance indexes: synchronization precision and convergence time in the network; the node uses the hop number information to dynamically select the parent node, time synchronization requirements for a dynamic topological network can be met, and anti-destruction and expansibility are good; and synchronization among nodes in a single hop range in the network adopts a TPSN bidirectional synchronization similar idea, transmission delay during the synchronization process is eliminated, and high synchronization precision can be achieved.

Description

technical field [0001] The invention belongs to the field of time synchronization between wireless sensor network nodes. Background technique [0002] As the basic protocol of Wireless Sensor Networks (WSNs), the time synchronization protocol plays a vital role in maintaining the performance of the entire network. According to the interaction of synchronization messages between the sender and the receiver, the classic time synchronization protocols in WSNs can be divided into the following three categories: ① one-way sending / receiving model, DTMS (Delay Measurement Time Synchronization), FTSP (Flooding Time Synchronization Protocol ); ② bidirectional sending / receiving model, TPSN (Timing-sync Protocol for Sensor Networks); ③ receiving / receiving model, RBS (Reference Broadcast Synchronization). [0003] However, these traditional researches on synchronization protocols are basically aimed at the range of one hop. When it is applied to the multi-hop synchronization of the en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04W40/02H04W84/18
CPCH04W56/0015H04W40/02H04W56/0035H04W56/004H04W84/18
Inventor 董恩清黄振强袁瑗高翔
Owner SHANDONG UNIV
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