Method for synchronizing time in wireless ad hoc network based on protocol of institute of electrical and electronic engineers (IEEE) 1588

A wireless self-organization and network clock technology, applied in time division multiplexing systems, electrical components, multiplexing communication, etc., can solve the problems of poor clock synchronization accuracy and achieve stability and high clock synchronization accuracy Effect

Inactive Publication Date: 2013-06-19
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0009] In order to overcome the deficiencies of poor clock synchronization precision of existing clock synchronization technology, the present invention provides a wireless ad hoc network clock synchronization method based on IEEE1588 protocol

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  • Method for synchronizing time in wireless ad hoc network based on protocol of institute of electrical and electronic engineers (IEEE) 1588
  • Method for synchronizing time in wireless ad hoc network based on protocol of institute of electrical and electronic engineers (IEEE) 1588
  • Method for synchronizing time in wireless ad hoc network based on protocol of institute of electrical and electronic engineers (IEEE) 1588

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[0031] Combine below figure 1 , figure 2 The conception, specific structure and technical effects of the present invention will be further described in order to fully understand the purpose, features and effects of the present invention.

[0032] First, the master-slave clock node performs communication measurement to obtain the master-slave delay t ms and slave-master delay t sm , the one-way delay between the master and slave clocks is obtained through operation. Secondly, limit and filter the one-way delay under the minimum backoff window to ensure that the IEEE1588 protocol is suitable for wireless ad hoc networks. Then, in the processing of the clock bias, the clock bias stabilization processing based on the discrete linear Kalman filter estimation is carried out to remove the large influence of the measured clock bias jitter caused by the unstable time delay in the wireless self-organizing network, so as to ensure that the present invention is Higher accuracy on syn...

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Abstract

The invention discloses a method for synchronizing time in a wireless ad hoc network based on a protocol of an institute of electrical and electronic engineers (IEEE) 1588 and aims to solve the technical problem that the time synchronization accuracy is low by the conventional time synchronization method. According to the technical scheme, the method comprises the following steps of: initializing the whole network to determine a master time node and a slave time node; performing delay measurement on time synchronization communication between the master time node and the slave time node to obtain master-slave communication delay, slave-master communication delay and unidirectional delay between the master time node and the slave time node; performing amplitude limiting filtering on the unidirectional delay in a state of a minimum withdrawn window, and performing filtering estimation on the unidirectional delay subjected to amplitude limiting through a first-order infinite impulse response filter; and calculating time deviation between the master node and the slave, and performing optimal estimation on the time deviation according to a discrete linear Kalman filtering algorithm. By the method, the time deviation stability of the time in the wireless ad hoc network is guaranteed, and the time synchronization accuracy is relatively high.

Description

technical field [0001] The invention relates to a wireless ad hoc network clock synchronization method, in particular to a wireless ad hoc network clock synchronization method based on the IEEE1588 protocol. Background technique [0002] Clock synchronization is one of the core technologies of distributed systems, and the performance of distributed network measurement and control systems largely depends on the clock synchronization accuracy that the network can provide. With the widespread application of distributed network measurement and control systems, in order to meet the needs of network measurement and control systems for high-precision synchronous clocks, IEEE (Institute of Electrical and Electronics Engineers, Institute of Electrical and Electronics Engineers) released the IEEE1588 precise clock synchronization protocol in 2002. Standard (Precision Time Protocol), referred to as PTP. In 2008, a new version of the IEEE1588 protocol was formulated, namely IEEE1588v2....

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
Inventor 陈旿孙建华张璐于振兴侯维苇洪亮慕德俊
Owner NORTHWESTERN POLYTECHNICAL UNIV
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