Slave station active communication method in star half duplex link

An active communication, half-duplex technology, applied in duplex signal operation, star/tree network, data exchange through path configuration, etc., can solve the problem of not being able to initiate communication requests actively

Inactive Publication Date: 2008-04-30
COMBA TELECOM TECH (GUANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the data interaction between stations in the centralized monitoring system can only take the form of one question and one answer, and theoretically the slave station cannot actively initiate a communication request

Method used

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  • Slave station active communication method in star half duplex link
  • Slave station active communication method in star half duplex link
  • Slave station active communication method in star half duplex link

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Embodiment Construction

[0042] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0043] In the centralized monitoring system, the master station needs to continuously collect the parameters of the slave station. If the slave station is abnormal, the master station must immediately report to the monitoring center. The master station collects the parameters of the slave stations by regularly sending inquiry command data packets to each slave station, and the slave stations respond to the inquiry data packets. The polling packet with a relatively fixed frame format is called a token. The token response packet is called a token response packet. If it is an active communication data packet sent due to other needs, it is called a command, and the response data packet of the command is called a command response packet.

[0044] see figure 2 , in the principle schematic diagram of the first embodiment of the slave station active communication...

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Abstract

The invention relates to a slave station active communication method in star-shaped half-duplex link, which includes the following steps: 1) a main station emits the token packets at definite time to be polled in a plurality of slave stations; 2) the slave stations complete the active command sending process at the same time or before sending the token response packets; 3) the slave stations send the token response packets to the main station. Compared with the prior art, the invention has the following advantages that: the command packets of the slave stations, which are sent between the receiving of the tokens and the response of the tokens, are changed to active from the passive by the application of the simple technology, so as to solve the problem of active communication between the slave stations and the main station, as well as between the slave stations and the slave stations.

Description

【Technical field】 [0001] The invention relates to the fields of mobile communication and industrial control, in particular to an active communication method for a slave station in a star-shaped half-duplex link. 【Background technique】 [0002] As a cross-application of computer technology and mobile communication technology, centralized monitoring technology plays a key role in the monitoring of each distributed working node of the mobile communication system. Usually, a centralized monitoring system includes multiple working ends, which form different networks according to different topological structures, and thus form different data links. In practical applications, the data link structure of centralized monitoring can be divided into two types, namely, point-to-point link and point-to-multiple link, such as figure 1 as shown, figure 1 In (a), there are only two nodes, namely point-to-point links; figure 1 (b) is a point-to-multiple link. If these data links are conne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/44H04L12/423H04L12/417H04L5/16
Inventor 赖远萱李胜利欧晓明刘大能
Owner COMBA TELECOM TECH (GUANGZHOU) CO LTD
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