Method for precisely synchronizing wireless sensor network under coal mine

A wireless sensor and synchronization algorithm technology, applied in the direction of synchronization devices, wireless communication, network topology, etc., can solve the problem of difficult and precise synchronization of wireless sensor networks, so as to avoid the accumulation of synchronization errors and achieve the effect of synchronization accuracy

Inactive Publication Date: 2010-04-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that the wireless sensor network in the coal mine is difficult to achieve precise synchronization, the present invention provides a precise synchronization method for the wireless sensor network in the coal mine

Method used

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  • Method for precisely synchronizing wireless sensor network under coal mine
  • Method for precisely synchronizing wireless sensor network under coal mine
  • Method for precisely synchronizing wireless sensor network under coal mine

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specific Embodiment approach 1

[0014] Specific implementation mode one: combine figure 1 To illustrate this embodiment, the precise synchronization method of the wireless sensor network in the coal mine is completed based on the following hardware:

[0015] Such as figure 2 As shown, a coal mine underground wireless sensor network is composed of a central station host 1, an Ethernet LAN backbone 2, a plurality of cluster head nodes 4 and a plurality of mobile nodes 5, and all cluster head nodes 4 are connected to the Ethernet LAN backbone 2. It is connected with the central station host 1 through the Ethernet LAN trunk line 2 to form a coal mine underground Ethernet LAN, and each cluster head node 4 and multiple mobile nodes 5 in the area form an intra-cluster wireless sensor network centered on the cluster head node 4 .

[0016] The specific steps of this synchronization method are as follows:

[0017] Step A, the central station host 1 sends configuration information to each cluster head node 4 in the ...

specific Embodiment approach 2

[0024] Specific implementation mode two: combination Figure 5 Describe this embodiment, this embodiment is a further description of step A, the specific steps in step A are:

[0025] Step A1, judging whether configuration information needs to be sent, if yes, execute step A2 and step A3, if not, execute step A3;

[0026] Step A2, sending configuration information;

[0027] Step A3, receiving, storing and displaying the offset information of each cluster head node 4, and observing the operating status and synchronization performance of the system composed of the Ethernet LAN and the wireless sensor network through the statistical characteristics of the offset information.

[0028] The host computer in the central station mainly completes the transmission of the configuration information of the IEEE1588 precision synchronization protocol. After the software is initialized, the synchronization interval can be configured as required. If the synchronization performance is not ve...

specific Embodiment approach 3

[0029] Specific implementation mode three: combination Figure 6 Describe this embodiment, this embodiment is a further description of step B, the execution of step B needs to establish three threads at the same time: thread (1) is to run the IEEE1588 protocol stack; thread (2) is to run the wireless sensor network communication protocol and measurement tasks ; Thread (3) is to run the wireless sensor network TPSN synchronization algorithm.

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Abstract

The invention provides a method for precisely synchronizing a wireless sensor network under a coal mine, which relates to the field of the precise synchronization of wireless sensor networks and solves the problem that the precise synchronization of the wireless sensor network under the coal mine is very difficult to achieve. The synchronization method is implemented by the following steps that: A, a central station host computer sends configuration information to each cluster head node of the wireless sensor network; B, the cluster head node receives the configuration information sent by thecentral station host computer, then performs time synchronization of an ethernet LAN and sends a synchronization command to a mobile node in the wireless sensor network; and C, the mobile node performs synchronization with the cluster head node. The method adopts an IEEE1588 synchronous protocol to finish the nanosecond synchronization of the ethernet LAN, adopts a single-hop TPSN synchronized algorithm to avoid the synchronization error accumulation, and is suitable for solving the precise synchronization problems of the wireless sensor network under the coal mine, and is also used for solving the synchronization problems of the combination of all ethernet LANs and wireless sensor networks.

Description

technical field [0001] The invention relates to the field of wireless sensor network synchronization. Background technique [0002] In wireless sensor networks, time synchronization technology is an indispensable and important part of wireless sensor networks. Measurement results and alarm information without time information are meaningless, so synchronization is a key technology in wireless sensor networks, and it is also Research content of many scholars and engineers. The synchronization algorithms of wireless sensor networks proposed by many scholars are generally based on a clock source, and then spread continuously, and finally achieve the synchronization of the whole network. The synchronous error caused by this synchronous mode accumulates seriously, so that the synchronous precision is very low, and it is not suitable for many applications requiring high synchronous precision. [0003] With the rapid development and wide application of wireless sensor networks, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H04W56/00H04W84/18
Inventor 彭宇乔立岩彭喜元罗清华潘大为王少军
Owner HARBIN INST OF TECH
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