METHOD AND SYSTEM FOR DISTRIBUTED REDUNDANCY CONTROL ON INTELLIGENT TRAFFIC NETWORK
First Claim
1. A method for distributed redundancy control on an intelligent traffic network comprising an intelligent traffic control center and a plurality of communication control nodes constituting a redundant network, the method comprises:
- for each of the communication control nodes, sending, by a communication control node, messages for electing a primary device to the other communication control nodes than the communication control node among the plurality of communication control nodes, and electing a primary device from the plurality of communication control nodes according to preset priorities of the communication control nodes, and backing up data of the communication control node in the primary device; and
sending, by the primary device, state detection messages to the other communication control nodes than the primary device among the plurality of communication control nodes, and for each of the other communication control nodes than the primary device among the plurality of communication control nodes, when a response message sent by the communication control node to respond to the state detection message indicates that the communication control node can not control any action of a device served by the communication control node, then controlling the action of the device served by the communication control node, and adjusting, by the primary device, control intervals of time of signaling lamps at junctions corresponding to the respective communication control nodes in the redundant network according to traffic flows at the junctions; and
when the response message is a message for electing a primary device, then instructing the communication control node to control again the action of the device served by the communication control node, and further backing up the data of the communication control node in the primary device.
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Accused Products
Abstract
Disclosed are a method and system for distributed redundancy control on an intelligent traffic network, the method includes: sending, by each communication control node, messages for electing a primary device to the other communication control nodes, and electing a primary device from the plurality of communication control nodes according to preset priorities of the communication control nodes, and backing up data of the communication control node in the primary device; and sending state detection messages to the other communication control nodes, if a response message of the communication control node to the state detection message indicates that the communication control node cannot control any action of a device served by the communication control node, controlling action of the device served by the communication control node, and adjusting control intervals of time of signaling lamps at junctions corresponding to the communication control nodes in a redundant network according to traffic flows.
4 Citations
10 Claims
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1. A method for distributed redundancy control on an intelligent traffic network comprising an intelligent traffic control center and a plurality of communication control nodes constituting a redundant network, the method comprises:
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for each of the communication control nodes, sending, by a communication control node, messages for electing a primary device to the other communication control nodes than the communication control node among the plurality of communication control nodes, and electing a primary device from the plurality of communication control nodes according to preset priorities of the communication control nodes, and backing up data of the communication control node in the primary device; and sending, by the primary device, state detection messages to the other communication control nodes than the primary device among the plurality of communication control nodes, and for each of the other communication control nodes than the primary device among the plurality of communication control nodes, when a response message sent by the communication control node to respond to the state detection message indicates that the communication control node can not control any action of a device served by the communication control node, then controlling the action of the device served by the communication control node, and adjusting, by the primary device, control intervals of time of signaling lamps at junctions corresponding to the respective communication control nodes in the redundant network according to traffic flows at the junctions; and
when the response message is a message for electing a primary device, then instructing the communication control node to control again the action of the device served by the communication control node, and further backing up the data of the communication control node in the primary device. - View Dependent Claims (2, 3, 4, 5)
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6. A system for distributed redundancy control on an intelligent traffic network comprising an intelligent traffic control center and a plurality of communication control nodes, the system comprises:
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a distributed control device configured to constitute a redundant network from the plurality of communication control nodes; devices for electing primary device and data backup, each configured to send messages for electing a primary device to the other communication control nodes than a communication control node comprising the device for electing primary device and data backup among the plurality of communication control nodes, to elect a primary device from the plurality of communication control nodes according to preset priorities of the communication control nodes, and to back up data of the communication control node in the primary device; and devices for detecting state and redundancy control, each configured to send state detection messages to the other communication control nodes than a primary device comprising the device for detecting state and redundancy control among the plurality of communication control nodes, and for each of the other communication control nodes than the primary device among the plurality of communication control nodes, when a response message responding to the state detection message indicates that the communication control node can not control any action of a device served by the communication control node, to control the action of the device served by the communication control node, and to adjust control intervals of time of signaling lamps at junctions corresponding to the respective communication control nodes in the redundant network according to traffic flows at the corresponding junctions, and when the response message is a message for electing a primary device, to instruct the communication control node to control again the action of the device served by the communication control node, and to further back up the data of the communication control node in the primary device. - View Dependent Claims (7, 8, 9, 10)
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Specification