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Annular redundancy series network structure and annular redundancy and hot plug methods thereof
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A technology of network structure and series network, applied in the direction of ring network, data exchange network, data exchange through path configuration, etc., can solve the problems of reduced system work efficiency, ineffectiveness, link failure, etc.
Active Publication Date: 2018-06-08
HUBEI PHILISENSE ELECTRONICS EQUIP
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The problem with this "hand-in-hand" structure of the series network is that when a node in the series line fails, the entire link will fail, so a certain mechanism is needed to ensure its robustness
[0005] In the work redundancy mode, the parallel mechanism can make the system have the potential to improve performance, but the task allocation and data exchange between the two parallel units will significantly increase the complexity of the system
[0006] In the backup redundancy mode, using exactly the same backup unit can reduce the workload and complexity of the system design, but the backup unit is usually in a standby state, which cannot be effective under normal circumstances, but will make the system bloated and useless. Reduced system efficiency
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Embodiment 1
[0066] Embodiment 1: as figure 2 As shown, a ring redundant serial network structure provided by the present invention includes a master device and eight slave devices, the master device is provided with a port A and a port B, and each slave device is provided with a port a and a port b. Eight slave devices are serially connected in series through corresponding ports to form a chain network structure. The two slave devices at both ends of the chain network structure are respectively connected to the two ports A and B of the master device to form a ring network. structure.
Embodiment 2
[0067] Embodiment 2: A method for realizing ring redundancy of a ring redundant serial network provided by the present invention comprises the following steps:
[0068] S1. Establish a physical initial ring redundant series network:
[0069] like figure 2 As shown, the ports A and B of the master device are respectively connected to the two ends of the chain network structure composed of eight slave devices in series to form a physical ring redundant series network structure;
[0070] S2. Through the process of "discovery step by step", two initial single-ended links logically connected to port A and port B of the main device, namely link LA and link LB, are established;
[0071] S3. Monitor and analyze the data information returned by the link LA and the link LB received by the port A and the port B respectively through the master device, and determine whether the two initial single-ended links LA and LB are operating normally;
[0072] S4. If the main device detects that ...
Embodiment 3
[0098] Embodiment 3: The present invention provides a kind of method that realizes the ring redundant serial network hot plug, comprises the following steps:
[0099] SS1. Establish a physical initial ring redundant series network: connect the ports A and B of the master device to the two ends of the chain network structure formed by 6 slave devices in series to form a physical ring redundant series network structure;
[0100] SS2. Through the process of "level-by-level discovery", two initial single-ended links logically connected to port A and port B of the main device, namely link LA and link LB, are established;
[0101] SS3. When it is necessary to add a new slave device to any initial single-ended link established in step SS2, first disconnect the initial single-ended link that needs to add a new slave device, and then place the new slave device The connection part of the link that needs to be added and establish a physical connection relationship with the original link...
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Abstract
The invention discloses an annular redundancy series network structure and annular redundancy and hot plug methods thereof. The annular redundancy series network structure is an annular network structure formed through series connection of a main device and N slave devices. Both the annular redundancy and hot plug methods comprise the steps of establishing the physical annular redundancy series network structure; establishing two logic initial single-ended links and returning corresponding link information to the main device; judging whether the corresponding initial links are abnormal or notaccording to the monitored link information return condition; and initializing all slave devices in the links when abnormities occur, reestablishing two logic new single-ended links after the devicesare initialized completely, repairing parts resulting in the abnormities in the data links at the same time, and ensuring that the annular network structure is in an annular valid connection state allthe time. The annular redundancy series network structure and the method have the advantages of low cost, high robustness, high stability and high flexibility.
Description
technical field [0001] The invention relates to a serial network structure, in particular to a ring redundant serial network structure and a method for ring redundancy and hot plugging. Background technique [0002] The series network of "hand in hand" structure is widely used in industrial bus, on-site conference bus and other systems because of its simple structure and convenient wiring. like figure 1 As shown, it is a schematic diagram of the structure of a "hand in hand" series network. This example includes 1 master device and 4 slave devices, and data is transmitted in the link through the forwarding of each node. The problem with this "hand in hand" serial network is that when a node in the serial line fails, the entire link will fail, so a certain mechanism is needed to ensure its robustness. [0003] Therefore, the present invention proposes a series network with a ring redundancy mechanism, which can effectively prevent and overcome the defects of the series netw...
Claims
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