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wtb node polling method

A polling method and node technology, applied in the field of rail transit, can solve problems such as data loss, and achieve the effect of avoiding process data loss

Active Publication Date: 2021-06-01
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, when there are many WTB nodes and the characteristic cycle set by the slave nodes is faster and the values ​​are relatively concentrated, the existing WTB node polling method is likely to cause the number of slave nodes that the WTB master node needs to poll to be greater than The maximum number of basic periodic polls, which will cause a part of the slave node's process data to be lost

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Embodiment Construction

[0045] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0046] Also, in the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without the specific details or in the particular manner described.

[0047]In addition, the steps shown in the flow diag...

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Abstract

A WTB node polling method, which includes: step 1, reading the characteristic period array, the characteristic period array includes the characteristic period of each slave node; step 2, obtaining the number of WTB nodes, and judging whether the number of WTB nodes is greater than the preset The maximum number of nodes polled in the basic cycle, among them, if it is greater than, then perform step 3, otherwise perform step 4; step 3, calculate the maximum allowable configuration number of each feature cycle according to the data of the feature cycle array, according to the maximum allowable number of each feature cycle Configure the number of nodes to adjust the number of nodes, and then perform step 4; step 4, perform basic periodic polling to balance the number of nodes, and build a list of completed cycles. This method can ensure that the number of nodes polled in each cycle is less than or equal to the maximum number of nodes that can be polled in this cycle, avoiding the problem caused by the number of nodes that need to be polled is greater than the maximum number of nodes that can be polled in this cycle. process data loss problem.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a WTB node polling method. Background technique [0002] WTB (Wire Train Bus) is a twisted train bus. The WTB bus is mainly used for train-level communication. Its transmission rate is 1Mbps, which can realize the transmission of process data and message data. The biggest feature of the WTB bus is that it has the function of the initial operation of the train. The function of the initial operation of the train is that when the configuration of the train vehicle changes, it can automatically address the vehicle and form a new train topology structure. This process does not require human participation. Therefore, the WTB bus is especially suitable for train vehicles that require dynamic grouping. [0003] The WTB bus can transmit process data periodically, and its transmission period is an integer multiple of the basic period (25ms), and the maximum length of the transmitted ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/403
CPCH04L12/403H04L2012/40293
Inventor 罗钦洋宁侨高英明唐军罗源唐鹏辉黄强
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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