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Packet packing method for slave station active communication in star half duplex link

An active communication, half-duplex technology, applied in the direction of 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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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Packet packing method for slave station active communication in star half duplex link
  • Packet packing method for slave station active communication in star half duplex link
  • Packet packing method for slave station active communication in star half duplex link

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0022] 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.

[0023] see figure 2 , in the schematic diagram of the principle of the combined packet method of the active communication ...

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Abstract

The invention relates to a packet combining method of the slave station active communication in star-shaped half-duplex link, including 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 combine the command packets and token response packets which are waited to be sent after receiving the token packets of the main station; 3) the main station reduces and decomposes the received combined packets to the token response packets and the command packets, as well as sends the command response packets to the corresponding slave stations for the response of the command packets. Compared with the prior art, the invention has the following advantages that: the invention combines the command and token response packets of the slave stations to the combined packets to send to the main station by making use of the time slot of the token response packets, so as to solve the problem of active communication between the slave stations and the main station without the influence of the collection frequency of the state parameters of the slave stations.

Description

【Technical field】 [0001] The invention relates to the field of mobile communication and industrial control, in particular to a combined package method for active communication of 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 da...

Claims

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Application Information

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