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Method, device and system for master station redundancy in ring communication network

A ring communication and network system technology, applied in the field of communication, can solve problems such as inability to realize data hot backup

Active Publication Date: 2018-01-12
EMERSON NETWORK POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a method, device and system for master station redundancy in a ring communication network to solve the problem that the master station redundancy method in the prior art cannot realize the function of data hot backup

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  • Method, device and system for master station redundancy in ring communication network
  • Method, device and system for master station redundancy in ring communication network
  • Method, device and system for master station redundancy in ring communication network

Examples

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Embodiment 1

[0053] Embodiment 1 of the present invention provides a method for master station redundancy in a ring communication network, the flow chart of which is as follows Figure 4 shown, including:

[0054] Step 401: The backup master station receives and buffers the data packets sent by the working master station adjacent to its own network location.

[0055] After the data packets sent by the working master station to the slave station and the backup master station in opposite directions by using at least two ports of itself arrive at the target site, the target site sends back a feedback data packet, and the feedback data packet reaches the working master station and the backup master is eliminated.

[0056] The data packet carries a network identification number, and the data packet may be a command data packet or other types of data packets, which are not limited here.

[0057] It should be noted that the working master station here sends data packets in the opposite directio...

Embodiment 2

[0067] Embodiment 2 of the present invention provides a method for master station redundancy in a ring communication network. To be precise, it is a synchronization method based on Embodiment 1 of the present invention. Its flow chart is as follows Image 6 shown, including the following steps:

[0068] Step 601: The backup master station receives the command packet sent by the working master station and records the second count value.

[0069] The second count value is the count value of the local clock counter when the backup master station receives the command data packet.

[0070] Step 602: The backup master station sends a feedback packet carrying the sum of the second count value and the third count value for the command data packet to the working master station.

[0071] The third count value is the count value of the local clock counter when the backup master station sends the feedback data packet.

[0072] Step 603: The backup master station receives the clock offse...

Embodiment 3

[0082] Embodiment 3 of the present invention provides a method for master station redundancy in a ring communication network, to be precise, it is a switching method based on Embodiment 1 of the present invention, and its flow chart is as follows Figure 8 shown, including the following steps:

[0083] Step 801: the backup master station determines that no command data packet is received within the first set time;

[0084] Step 802: the backup master station sends a feedback data packet carrying upgrade preparation information to the working master station;

[0085] Step 803: The backup master station upgrades itself to a working master station after waiting for a second set time.

[0086] It should be noted that the solution in Embodiment 3 of the present invention may also be used in combination with the solution in Embodiment 2 above.

[0087] Use below Figure 9 The handover method based on the master station redundancy method of the ring communication network in the th...

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Abstract

The invention discloses a ring communication network master station redundancy method, a device and a system. The method comprises steps: a backup master station receives and caches a data packet sent by a working master station adjacent to the network position of the backup master station, after a data packet sent by the working master station in an opposite direction arrives at a target station, the target station sends a feedback data packet back, and the feedback data packet is eliminated after arriving at the working master station and the backup master station; the backup master station determines a network identification number of the data packet is the same as the self network identification number, the feedback data packet is sent back; or else, the date packet is forwarded forwardly, and the data packet is eliminated after arriving at the target slave station or the working master station. When a line or the slave station fails, the backup master station can cache all data packets sent by the working master station as network positions of the backup master station and the working master station are adjacent; the feedback data packet back sent by the slave station is eliminated after arriving at the working master station and the slave station, the backup master station can receive the feedback data packet from a non-fault slave station, and thus the backup master station can receive all data packets and the feedback data packets, and hot backup of data is realized.

Description

technical field [0001] The invention relates to communication technology, in particular to a method, device and system for redundancy of a master station of a ring communication network. Background technique [0002] Applying Ethernet to the field-level industrial environment has become an important development direction of industrial control. Industrial Ethernet has the following advantages: high communication rate, strong resource sharing ability, and can realize the function of "integrated management and control"; it has great potential for sustainable development, and users do not need independent research investment in technology upgrading. However, in industrial sites, the environmental factors are more complex. Factors such as electromagnetic interference, temperature and humidity changes, and vibration can cause network system failures, which will cause subsequent network failures at the fault point and even cause system paralysis. Therefore, in some occasions that ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/437
Inventor 周朝阳姚詹图
Owner EMERSON NETWORK POWER CO LTD
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