Method and equipment for coordinated control in intelligent traffic cloud control system

A method for coordinated control in an intelligent traffic cloud control system comprising at least a central system, a plurality of control servers, and a plurality of IP-enabled field devices, wherein the central system is connected with the control servers over a network, and the IP-enabled field devices are connected with the control servers over IP address based broadband buses;

• and the method comprises:
• detecting, by the central system, the states of respective control servers in a service area, and selecting a temporary primary node based upon state detection information;
• and
• triggering, by the central system, the temporary primary node to distribute subscription messages to the control servers satisfying a preset condition, to generate a corresponding coordinated control strategy according to information acquired by the IP-enabled field devices, and corresponding processing results, reported by the respective control servers in response to the subscription messages, and to transmit the generated coordinated control strategy respectively to the corresponding control servers,
• wherein the coordinated control strategy is configured to control time for signaling lamps at crossings in service areas of the respective control servers;
• wherein detecting, by the central system, the states of respective control servers in the service area comprises:
• detecting, by the central system, states of traffic jam states at the crossings in service areas of the respective control servers;
• wherein selecting, by the central system, the temporary primary node based upon the state detection information comprises:
• selecting, by the central system, the central system as the temporary primary node upon determining that the size of an area with a traffic jam in the service area reaches a first preset threshold, based upon the obtained state detection information;
• or
• selecting, by the central system, the central system as the temporary primary node upon determining that the size of an area with a traffic jam in the service area does not reach a first preset threshold, and the number of control servers in the area with the traffic jam reaches a second preset threshold, based upon the obtained state detection information;
• or
• selecting, by the central system, one of the control servers in an area with a traffic jam in the service area as the temporary primary node upon determining that the size of the area with the traffic jam does not reach a first preset threshold, and the number of control servers in the area with the traffic jam does not reach a second preset threshold, based upon the obtained state detection information.