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Multi-host communication mechanism based on half duplex communication

A technology of half-duplex communication and communication mechanism, which is applied in the direction of duplex signal operation, digital transmission system, electrical components, etc., which can solve the problems of inability to transmit at the same time, and achieve the effect of smooth communication

Inactive Publication Date: 2017-05-31
雷蕾
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Half-duplex (Half Duplex) data transmission means that data can be transmitted in both directions of a signal carrier, but cannot be transmitted at the same time

Method used

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  • Multi-host communication mechanism based on half duplex communication
  • Multi-host communication mechanism based on half duplex communication
  • Multi-host communication mechanism based on half duplex communication

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A multi-host communication mechanism based on half-duplex communication, comprising the steps of:

[0034] (1) There are 5 central controllers in a station area, and the addresses of the central controllers are set according to the order. The difference between the addresses of the two central controllers is less than 3, so the final sorting result is the central control address 1, and the Control address 2, central control address 4, central control address 5, central control address 7, the address of the central controller is set on the LCD device.

[0035] (2) The central controller with address 1 checks that it has GPRS when it is powered on and initialized. At this time, the central controller with address 1 is automatically upgraded to the host. At this time, the host immediately sends a heartbeat broadcast message to tell other central controllers This network has a host.

[0036] (3) After the host sends the heartbeat message, it needs to know how many central ...

Embodiment 2

[0040] A multi-host communication mechanism based on half-duplex communication, comprising the steps of:

[0041] (1) There are 6 central controllers in a station area, and the addresses of the central controllers are set according to the sorting. The difference between the addresses of the two central controllers is less than 5, so the final sorting result is the central control address 1, and Control address 3, central control address 4, central control address 5, central control address 8, central control address 9, the address of the central control is set on the LCD device.

[0042] (2) These 6 central controllers are powered on at the same time, and each central controller does not have GPRS. At this time, confirm the host according to the delay time. After the delay time reaches 1 minute, the central controller whose address is 1 after the interruption has not received the heartbeat message from other central controllers. Automatically upgrade to host, at this time the...

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Abstract

The invention discloses a multi-host communication mechanism based on half duplex communication. The method comprises the steps of (1), setting center controller addresses in a transformer area according to a sequence; (2), determining a host and slaves after central controllers are electrified and initialized; (3), carrying out statistics and polling on the slaves after the host sends heartbeat messages; and (4), 10 minutes after any time when the host is confirmed and when the online host or slaves receive no message, giving up the host and carrying out new host campaign. According to the mechanism, the problem that more than two central controllers appear in the transformer area, a multi-way conflict occurs in carrier communication of the half duplex communication, and the plurality of central controllers cannot transmit and receive data at the same time due to the fact that an adjustment branch balance mode is employed in an algorithm is solved. According to the multi-host communication mechanism based on the half-duplex communication provided by the invention, the central controllers are coordinated to finish a communication task and the communication is smooth.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a multi-host communication mechanism based on half-duplex communication. Background technique [0002] Half-duplex (Half Duplex) data transmission means that data can be transmitted in both directions of a signal carrier, but cannot be transmitted at the same time. For example, using technology with half-duplex transmission on a LAN, a workstation can send data on the wire and then immediately receive data on the wire from the direction the data was just transmitted. Like full-duplex transmission, half-duplex involves a bidirectional line (the line can pass data in both directions). [0003] Half-duplex transmission refers to a transmission mode in which receiving and sending share a carrier channel, but only data can be sent or received at the same time. For example, half-duplex data transmission in a local area network means that a workstation sends data and then immediately rece...

Claims

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Application Information

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IPC IPC(8): H04L5/16H04L12/24H04L12/26
CPCH04L5/16H04L41/08H04L43/10
Inventor 雷蕾
Owner 雷蕾