WO2015146641A1 - 編成内ネットワークシステム、編成内ネットワーク管理方法、および管理装置 - Google Patents
編成内ネットワークシステム、編成内ネットワーク管理方法、および管理装置 Download PDFInfo
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- WO2015146641A1 WO2015146641A1 PCT/JP2015/057507 JP2015057507W WO2015146641A1 WO 2015146641 A1 WO2015146641 A1 WO 2015146641A1 JP 2015057507 W JP2015057507 W JP 2015057507W WO 2015146641 A1 WO2015146641 A1 WO 2015146641A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40019—Details regarding a bus master
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/44—Star or tree networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0866—Checking the configuration
- H04L41/0873—Checking configuration conflicts between network elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0893—Assignment of logical groups to network elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/26—Rail vehicles
Definitions
- the present invention relates to communication between network devices mounted on railway vehicles and the like, and more particularly to multiplexing and switching operations of control devices that manage the system.
- the network monitoring device mounted on each vehicle configures the monitoring network via each network switch and realizes communication between the vehicles.
- a control device that controls this monitoring network is mounted.
- Due to the nature of trains a single train is formed by connecting a plurality of types of vehicles such as driving vehicles and cabin vehicles, and the required network devices may be different for each vehicle.
- some vehicles are equipped with a control device and some vehicles are not, and a case where there is one control device or two or more control devices installed in one train is assumed.
- there is one control device there is no particular problem, but when there are two or more control devices, there are a plurality of control systems, and it is necessary to determine the control system uniformly.
- the present invention has been made in view of such a conventional situation, and an object of the present invention is to provide a system capable of stably controlling or managing a network within a composition regardless of how the railway vehicle is organized. To do.
- the system according to the present invention has the following configuration as one configuration example.
- the organization network system or organization network management method according to the present invention the organization network system of organization comprising one or more vehicles, the network device and at least the management device for managing the network device is mounted,
- the management device acquires first information related to the network in the organization, determines whether or not it is the main management device in relation to the first information, and the main management device that becomes the main Controls the network device.
- the in-composition network is composed of an upper network that controls the operation of the composition and a lower network that includes the network device, and the upper network
- the lower network is connected via the management device, and the management device acquires the first information from the upper network.
- the network device transmits information regarding its own state to the management device, and the management device transmits information regarding the state of the network device.
- status information relating to the network device is aggregated and transmitted to the upper network as second information.
- the main management device is configured to manage information necessary for the operation of the network device with respect to the network device based on the first information. Send.
- the management apparatus determines whether the management information has been received from another management apparatus after the intra-composition network system is activated. 12. The intra-organization network management method according to claim 11, wherein when it is not received, the network device controls itself as a main management device.
- the management devices there are at least two management devices, and the management devices other than the main management device are sub-management devices.
- the second information that should be transmitted to the sub management apparatus has not been received for a predetermined period of time, or the abnormality of the main management apparatus is added to the second information transmitted from the main management apparatus to the sub management apparatus.
- the sub management apparatus plays the role of the main management apparatus, and the main management apparatus changes the role to play the role of the sub management apparatus.
- the management devices other than the main management device are sub-management devices.
- the second information transmitted to the sub management device includes information indicating that status information is transmitted from some of the network devices and status information is not transmitted from other network devices. In this case, the role is changed so that the sub management apparatus plays the same role as the main management apparatus.
- a management apparatus is a management apparatus for managing the network device, which is installed in a network system in a composition composed of one or more vehicles and in which the network equipment is mounted in each vehicle, The first information related to the network is acquired, it is determined whether or not it is the main management device in relation to the first information, and when it becomes the main, the network device is controlled.
- the management device is connected to an upper network that controls the operation of the composition and the lower network that includes the network device, which constitutes the intra-composition network, and acquires the first information from the upper network. .
- the management apparatus when the management apparatus according to the present invention becomes the main management apparatus, the management apparatus transmits management information necessary for the operation of the network device to the network device based on the first information.
- the management apparatus determines whether or not the management information has been received from another management apparatus after the intra-composition network system has been activated.
- the network device is controlled as a device.
- the management device if it is not the main management device, it becomes a sub-management device, and the second information obtained by counting the status information of the network device that should be transmitted from the main management device is predetermined.
- the management device when it does not become the main management device, it becomes a sub management device, and the second information obtained by totalizing the status information of the network device transmitted from the main management device to the sub management device. If the information includes information indicating that the state information is transmitted from some of the network devices and not transmitted from other network devices, the same role as the main management device is included. Change roles to fulfill.
- a vehicle means one vehicle constituting a train
- a train means a mode in which the vehicles are connected
- a train means a mode in which the vehicle actually operates.
- FIG. 1 is a diagram showing a configuration example of an intra-organization network according to the first embodiment of the present invention.
- 1 to 4 are vehicles, which constitute a train of one train.
- the direction of the arrow in FIG. 1-1 to 4-1 are network switches that connect each network device and connect a monitoring network between vehicles
- 1-2 and 4-2 are host servers that manage train operations
- 1-3 and 4-3 are Management server that controls each network device in the train
- 1-4 to 4-4 are cameras A that face the traveling direction of the vehicle and photograph the vicinity of the right entrance door
- 1-5 to 4-5 are traveling directions of the vehicle
- Camera B for photographing the vicinity of the entrance door on the left side
- 1-6 to 4-6 are recording devices for recording images acquired by the cameras of each vehicle
- 1-7, 4-7 are images within the train, etc.
- Monitors 1-8 to 4-8 to be displayed are network switches for connecting upper networks between vehicles, and are connected by a network such as a LAN (Local Area Network).
- a network such as a LAN (Local Area Network).
- the image of the camera A4 or the camera B5 is displayed on the monitor 1-7, which is a monitor mounted on the leading vehicle in the traveling direction, but may be displayed on the rear vehicle monitor 4-7.
- the network switch may be of any type such as an L2 switch, a switching hub, or a router as long as it has a packet transfer function and an SNMP (Simple Network Management Protocol) client function.
- SNMP Simple Network Management Protocol
- the number of each network device in the figure is “device name + vehicle number + device number”. If it is necessary to distinguish each network device for each vehicle, “device name + vehicle number + device number” is used. “, And when calling without distinction,” device name + device number ".
- camera A will be described as camera A1-4 when distinguished for each vehicle, and camera A4 when not distinguished.
- the vehicle 1 and the vehicle 4 are vehicles having a driver's seat, and are respectively network switches 1-1 and 4-1, upper servers 1-2 and 4-2, management servers 1-3 and 4-3, and cameras A1-4. 4-4, cameras B1-5, 5-5, recording devices 1-6, 4-6, monitors 1-7, 4-7, and network switches 1-8, 4-8.
- Network devices are connected via network switches 1-1 and 1-4, and in the host network, host servers 1-2 and 4-2 and management servers 1-3 and 4-3 are network switches 1-8 and 4-8.
- the vehicle 2 and the vehicle 3 are vehicles that do not have a driver's seat.
- each network device is connected via network switches 1-1 and 4-1. They are connected via switches 2-8 and 3-8.
- the network switches 1 and 8 are connected to each other between adjacent vehicles, thereby constructing the intra-composition network.
- the host server 2 and the management server 3 are mounted on the leading vehicle and the trailing vehicle, respectively, and one of them operates as a main and one of them operates as a sub. Basically, the main controls and manages each network device, and the sub does not operate to control other devices.
- the main determination method and operation of the management server 3 will be described later. In this embodiment, it is assumed that the upper server 1-2 and the management server 1-3 operate as mains.
- a network including a camera above the broken line is a monitoring network
- a network including a higher server below the broken line is an upper network.
- the host network is a network related to the entire railway vehicle system
- the monitoring network is a network related to a monitoring system using video of the railway vehicle.
- the upper network and the monitoring network are divided by a subnet mask and connected via a management server.
- the management server 3 has a port on the monitoring network side and a port on the upper network side, manages both networks separately by VLAN (Virtual Local Area Network), and communicates between the upper network and the monitoring network. Are all performed by the management server 3.
- VLAN Virtual Local Area Network
- the host network is connected mainly to a vehicle operation (not shown) including the host server 2 and the management server 3, and the monitoring network includes the management server 3, the network switch 1, the camera A4, the camera B5, the recording device 6, And a device related to video monitoring including the monitor 7 is connected.
- FIG. 2 is a flowchart showing a management method of the composition monitoring network by the management server at the time of train activation and operation.
- the host network When the train is turned on, power is supplied to each network device in the train to start up (start up).
- the host network starts preparing devices for operation.
- the host server 1-2 determined as the main uses DHCP (Dynamic Host Configuration Protocol) to manage the management server 1-3 and the management server 4-3. Is assigned an IP address on the upper network side (S1). Subsequently, the upper server 1-2 notifies the operation information to the management server 1-3 and the management server 4-3 by multicast (S2).
- DHCP Dynamic Host Configuration Protocol
- the operation information is information such as a vehicle ID, a leading vehicle (traveling direction), a speed, a current position, a door opening / closing, a connection flag, and a separation flag. It is a combination of several-digit numbers indicating the power type, the vehicle type, the number of vehicles for organization, the car number, and the like.
- the management information includes information such as time, position information, and vehicle number, which is metadata recorded with the video, and may include a flag indicating that the transmission source management server 3 is main.
- the management server 1-3 and the management server 4-3 analyze the vehicle ID in the operation information received based on the configuration information of the vehicle ID stored in advance by itself, and store the vehicle ID for each vehicle type stored in advance. With reference to the device configuration information, the IP address of each network device is calculated, and an address management table, which is a management table of network devices, is created (S3).
- Each of the management server 1-3 and the management server 4-3 determines whether or not broadcast management information has been received from a management server 3 other than itself (S4). Recognize that it is a server (S5), broadcast management information created based on operation information to the monitoring network (S6), and if received (Yes), recognize itself as a sub-management server (S11) waits (S12).
- the management server 1-3 and the management difference field 4-3 broadcast a management information packet including its own IP address to each network device of the monitoring network. (S6).
- the management server 1-3 having a small IP address value and faster processing has transmitted the management information first, the management server 1-3 being the main, and the management server 4-3 being the sub. Shall be.
- each network device such as the camera A4, the camera B5, the management server 4-6, the recording device 6, and the monitor 7 receives the management information packet of the broadcast packet from the main management server 1-3, the source IP address information in the packet Is registered as response packet transmission destination information, and information about its own state is returned to the main management server 1-3.
- the source IP address information in the packet Is registered as response packet transmission destination information, and information about its own state is returned to the main management server 1-3.
- SNMP Trap can be used for example.
- the main management apparatus 1-3 determines whether responses have been received from all network devices (S7). If responses have been received from all network devices (Yes), a response is sent to the upper server 1-2 by multicast including the status information of each network device (S8), and it is determined whether operation information has been received from the upper server. (S9). If the operation information has been received (Yes), the process proceeds to S6, and if not received (No), S9 is repeated until it is received. If no response has been received from all network devices in S7 (No), the process proceeds to S10, where it is determined whether a predetermined time has elapsed (S10), and if the predetermined time has elapsed (Yes), it is assumed that there is no response. The process proceeds to S8 and responds to the upper server 1-2. If the predetermined time has not elapsed (No), the process proceeds to S7 and waits for a response from the network apparatus that has not responded.
- the management server 1-3 When the management server 1-3 establishes a communicable state within the monitoring network, the management server 1-3 notifies the host server 1-2 that the communicable state is established. When the preparation of the in-train system other than the monitoring network is completed, the train operation starts (operation).
- the upper server 2 and the management server 3 communicate with each other by multicast, and the main management server 1-3, which is the main in the monitoring network, transmits management information by broadcast. Therefore, in the upper network, the multicast packet transmitted from the upper server 2 reaches both the main management server 1-3 and the sub management server 4-3, and the multicast packet transmitted as a response by the main management server 1-3 is transmitted to the upper server 2 To the sub management server 4-3.
- the broadcast packet transmitted from the main management server 1-3 also reaches the sub management apparatus 4-3, and the sub management apparatus 4-3 is one of the network devices to the main management server 1-3. Respond with its own status information. In order to avoid management confusion, the response from the management server 3 to the upper server 2 is transmitted only from the main management server 1-3 which is the main server.
- each network device When management information is broadcast from the main management server 1-3, each network device responds to the main management server 1-3 with its own status information. In consideration of network congestion, the camera A4 and the camera B5 transmit the status information to the recording device 6, and the recording device 6 collects the status information of the camera A4 and the camera B5 together with its status information.
- the network switch 1 may collect the status information of the camera A4, the camera B5, and the recording device 6 and respond to the main management server 1-3.
- each device When the train starts operation in the traveling direction, the upper server 1-2 periodically transmits operation information to the management server 1-3 and the management server 4-3, and the main management server 1-3 performs this operation. Management information is transmitted to each network device based on the information. Each network device returns its state information directly or indirectly to the main management server 1-3 by SNMP Trap in the form of returning to the management information. The main management server 1-3 responds to the upper server 1-2 based on the trap of each network device.
- the main management server 1-3 controls each network device based on the operation information.
- the main management server 1-3 uses the video of the camera A4 or the camera B5 based on the door opening / closing information in the operation information received from the host server 1-2.
- the recording device 6 is controlled to start or stop recording. Based on the received door opening / closing information, the recording device 6 starts recording video of the camera A or camera B if the door is open, and records video of the camera A or camera B if the door is closed. Stops after a predetermined time has passed since closing. For example, if the right door is open, the recording device 6 starts recording the video of the camera A4 mounted on the same vehicle based on the control from the management server, and records the video of the camera 4A when the right door is closed. Stop after 30 seconds.
- the management server 1-3 controls the monitor 1-7 to turn on or off the video display of the camera A4 or the camera B5 based on the speed information and door opening / closing information received from the host server 1-2. .
- the monitor 1-7 starts displaying the image of the camera A or camera B if the speed is equal to or lower than the predetermined value and the door is open. If it is larger, the display of the video of camera A or camera B is stopped. For example, if the speed is 5 km / h or less and the left door is opened, the monitor 1-7 starts displaying the image of the camera B5 based on the control from the management server, and the speed becomes higher than 5 km / h. The display of the video of the camera 5B is stopped.
- FIGS. 3, 4, 5, 6, 7, 8, 9, and 10 the management system is reconstructed when the host network and the monitoring network are normal and when an abnormality occurs.
- FIGS. 5 and 6 are when the main management server is powered off
- FIGS. 7 and 8 are when the main management server is isolated in the system
- FIGS. 9 and 10 are monitoring networks.
- the solid line of the arrow indicates that the actual signal can be normally transmitted and received
- the broken line indicates that the signal has been transmitted but cannot be received or is unknown
- the one-dot chain line indicates processing or transmission if it is normal. Indicates that it was not possible due to an abnormality.
- Fig. 3 shows the state of communication of the upper network during normal operation.
- the upper server 1-2 multicasts operation information to the upper network.
- the main management server 1-3 performs management information notification and status information collection and aggregation within the monitoring network based on the operation information.
- the main management server 1-3 multicasts a response to the upper server into the upper network.
- the sub management server 4-3 stands by without performing any special processing for the monitoring network. Further, even if the sub monitoring server 4-3 receives a response from the main management server 1-3 to the higher level server, the sub monitoring server 4-3 stands by without performing any special processing.
- Fig. 4 shows the state of monitoring network communication under normal conditions.
- the main management server 1-3 When receiving the operation information, the main management server 1-3 creates management information and broadcasts it to the monitoring network.
- the network device including the sub management server 4-3 updates the trap destination IP address from the transmission source information in the management information to the main management server 1-3, and updates its status information to the trap destination. Send to address.
- the main management server 1-3 aggregates and updates the status information of each network device, and multicasts a response to the upper server including the abnormal information of the network device in the upper network. To do. Even if the sub management server 4-3 receives the operation information, the sub management server 4-3 stands by without performing any special processing.
- FIG. 5 shows a state of communication of the upper network when the main management server is powered off.
- the upper server 1-2 multicasts operation information to the upper network. Since the main management server 1-3 is powered off, it cannot perform processing in the monitoring network and cannot respond to the upper network.
- the sub-management server 4-3 receives the notification from the main management server 1-3 (the management information notification in the monitoring network and / or the response to the higher-level server in the higher-level network) even if a predetermined time has elapsed after receiving the operation information.
- the sub management server 4-3 becomes the main instead of the main management server 1-3, and the main management server 4-3 Management information notification and status information collection and aggregation in the monitoring network. Then, the main management server 4-3 multicasts a response to the upper server into the upper network. However, even if the original management server 1-3 is restored, the main is not changed, that is, the main is operated as the management server 4-3.
- the predetermined time here is longer than the predetermined time (S10 in FIG. 2), which is a waiting time from when the main management server transmits management information to each network device until the response is received.
- FIG. 6 shows how the monitoring network communicates when the main management server is powered off.
- the main management server 1-3 cannot perform signal reception and processing due to the stop of the power supply.
- the sub management server 4-3 receives the operation information, and determines that an abnormality has occurred in the main management server 1-3 when the notification from the main management server does not arrive for a predetermined time after receiving the operation information.
- 4-3 becomes the main instead of the main management server 1-3, and the main management server 4-3 creates management information based on the operation information and broadcasts the management information into the monitoring network.
- the network device updates the IP address that is the Trap destination from the transmission source information in the management information to the main management server 4-3, and transmits its own state information toward the Trap destination address.
- the main management server 4-3 When the main management server 4-3 receives the traps of all the network devices, the main management server 4-3 aggregates and updates the status information of each network device, and multicasts a response to the upper server including the abnormality information of the network device in the upper network. To do.
- FIG. 7 shows a state of communication in the upper network when the main management server is isolated in the upper network due to a port on the upper network side or a communication path error.
- the upper server 1-2 multicasts operation information to the upper network. Since the main management server 1-3 does not receive the operation information from the upper server 1-2, the main management server 1-3 cannot perform processing in the monitoring network and cannot respond to the upper network.
- the sub-management server 4-3 receives the notification from the main management server 1-3 (the management information notification in the monitoring network and / or the response to the higher-level server in the higher-level network) even if a predetermined time has elapsed after receiving the operation information.
- the sub management server 4-3 becomes the main instead of the main management server 1-3, and the main management server 4-3 Management information notification and status information collection and aggregation in the monitoring network. Then, the main management server 4-3 multicasts a response to the upper server into the upper network.
- FIG. 8 shows a state of communication in the monitoring network when the main management server is isolated in the upper network due to an upper network side port or communication path error. Since the main management server 1-3 cannot receive the operation information from the host server 1-2, the main management server 1-3 cannot create the management information and cannot broadcast the management information to the monitoring network. Since the network device including the sub management server 4-3 does not receive the management information, it does not return a Trap. The sub management server 4-3 receives the operation information, and determines that an abnormality has occurred in the main management server 1-3 when the notification from the main management server does not arrive for a predetermined time after receiving the operation information.
- the main management server 4-3 becomes the main instead of the main management server 1-3, and the main management server 4-3 creates management information based on the operation information and broadcasts the management information into the monitoring network.
- the network device including the subordinate management server 1-3 updates the trap destination IP address from the transmission source information in the management information to the main management server 4-3, and the status information of itself To the Trap destination address.
- the main management server 4-3 receives the traps of all the network devices, the main management server 4-3 aggregates and updates the status information of each network device, and multicasts a response to the upper server including the abnormality information of the network device in the upper network. To do.
- FIG. 9 shows a state of communication of the upper network when the main management server is isolated in the monitoring network due to a monitoring network side port or communication path error.
- the upper server 1-2 multicasts operation information to the upper network.
- the main management server 1-3 performs monitoring network processing based on the operation information. However, the main management server 1-3 determines that there is no response from the network device and is isolated, and multicasts a response indicating that there is an abnormality to the upper network. Demote.
- the sub management server 4-3 receives a response indicating an abnormality from the main management server 1-3
- the sub management server 4-3 becomes the main instead of the main management server 1-3, and the main management server 4-3 Management information is reported and status information is collected and aggregated in the monitoring network based on the operation information. Then, the main management server 4-3 multicasts a response to the upper server into the upper network.
- FIG. 10 shows how the monitoring network communicates when the main management server is isolated within the monitoring network due to a monitoring network side port or communication path error.
- the main management server 1-3 receives the operation information, it creates management information based on the operation information and broadcasts it to the monitoring network. However, since the main management server 1-3 is isolated from other network devices due to a port or network abnormality, the management information does not reach the other network devices. If Trap is not received from the network device including the sub management server 4-3 for a predetermined period, Ping is transmitted to each network switch 1 to confirm whether communication is possible.
- the main management server 1-3 determines that it is isolated in the monitoring network, and notifies the upper network that an abnormality has occurred and the main is demoted. .
- the main management server 1-3 demotes the main and becomes the sub management server 1-3.
- the sub management server 4-3 receives a response indicating an abnormality from the main management server 1-3, the sub management server 4-3 itself becomes the main instead of the main management server 1-3, and the main management server 4-3 operates as the operation information. Management information is created based on the information, and the management information is broadcasted to the monitoring network.
- the network devices other than the subordinate management server 1-3 Upon receiving the management information, the network devices other than the subordinate management server 1-3 update the IP address that is the trap destination from the transmission source information in the management information to the main management server 4-3, and the status information of itself To the Trap destination address.
- the main management server 4-3 receives the traps of all network devices except the sub management server 1-3, the main management server 4-3 aggregates and updates the status information of each network device, and includes the abnormality information of the network device in the upper network Sends a response to the upper server in multicast.
- FIG. 11 shows a state of communication of the upper network when the monitoring network is divided due to an abnormality in the network switch 1 or the communication path.
- the upper server 1-2 multicasts operation information to the upper network. Since the main management server 1-3 and the sub management server 4-3 detect and recognize that the monitoring network is divided, each performs processing in the monitoring network independently. Sends a response to the upper server in the network in multicast.
- FIG. 12 shows how the monitoring network communicates when the monitoring network is divided due to an abnormality in the network switch 1 or the communication path.
- the main management server 1-3 receives the operation information, it creates management information based on the operation information and broadcasts it to the monitoring network. Since the monitoring network is divided, the management information reaches the network device in the divided monitoring network including the main management server 1-3, but the divided monitoring does not include the main management server 1-3. Management information does not reach network devices in the network.
- the network device that has received the management information updates the IP address that is the trap destination from the transmission source information in the management information to the main management server 4-3, and directs its own state information to the trap destination address. To send.
- a network device that has not received management information including the sub management server 4-3 cannot receive a Trap response because it has not received management information.
- the main management server 4-3 receives the traps of some network devices, the main management server 4-3 does not receive the traps of the remaining network devices. Therefore, the main management server 4-3 aggregates and updates the status information of the network devices that have received the traps. The state of the network device that has not been received is updated as no Trap response, and it is determined that the network is disconnected. At this time, Ping may be transmitted to each network switch 1 for confirmation again.
- a response to the upper server including the fact that the monitoring network is divided is multicast transmitted to the upper network.
- the sub-management server 4-3 When the sub-management server 4-3 receives the notification that the monitoring network is divided, the sub-management server 4-3 plays a main role in order to control the divided monitoring network including the sub-management server 4-3. That is, it plays the same role as the main management server 1-3 while remaining in the sub until the monitoring network is restored. Accordingly, when receiving the operation information, the main management server 1-3 and the sub management server 4-3 create management information and broadcast it to the monitoring network.
- the network device in the divided monitoring network including the main management server 1-3 receives the management information transmitted from the main management server 1-3, and sets the IP address that is the trap destination as the transmission source information in the management information. To the main management server 1-3, and transmits its own status information to the main management server 1-3, which is the trap destination address.
- the network device in the divided monitoring network including the sub management server 4-3 receives the management information transmitted from the sub management server 4-3, and transmits the IP address as the trap destination in the management information.
- the original information is updated to the sub management server 4-3, and its own status information is transmitted to the sub management server 4-3 that is the trap destination address.
- the main management server 1-3 and the sub management server 4-3 receive the trap of each network device, the status information of each network device is aggregated and updated, and the response to the upper server is multicast transmitted to the upper network. To do.
- the main management server 1-3 and the sub management server 4-3 broadcast the management information to the monitoring network, but the management information transmitted by the main management server 1-3 is the sub management server 4-3. Therefore, the sub management server 4-3 determines that the network division has been restored, and refrains from responding to the upper server even if Trap is returned from each network device. On the other hand, the main management server 1-3 does not change, receives Traps from each network device, aggregates and updates the status information, and broadcasts a response to the upper server to the upper network.
- the reason why the sub management server 4-3 does not become the main is that the main management server 1-3 operates as the main and the sub management server 4-3 operates as the sub after the monitoring network is restored. Because it is smooth to return to the state.
- Some network switches have a function of short-circuiting a port when an abnormality occurs or a power supply is stopped. When such a network switch is used, only a network device of a specific vehicle is trapped. No response. In such a case, the main management server 1-3 multicasts the fact that there is no Trap response for a specific vehicle into the upper network by including it in the response to the upper server.
- unified system management is possible regardless of how the vehicles are combined in any way, and network equipment and Even if an abnormality occurs in the network, it can be operated continuously without stopping the monitoring system. As a result, safer and more reliable operation of railway vehicles can be supported.
- FIG. 13 is a configuration example of the in-composition network when the vehicles are connected according to the second embodiment of the present invention.
- the vehicle has the same configuration as the vehicles 1 to 4 described in the first embodiment. 5 to 8 are connected.
- the network switch 4-8 of the vehicle 4 and the network switch 5-8 of the vehicle 5 are connected.
- the monitoring network the network switch 4-1 of the vehicle 4 and the network switch 5-1 of the vehicle 5 are connected. Is connected. Since the configuration of the network device in each vehicle is the same as that of the first embodiment, the description of the parts already described in the first embodiment is omitted. Also in this embodiment, the direction of the arrow in FIG.
- 5-1 to 8-1 are network switches that connect each network device and connect the monitoring network
- 5-2 and 8-2 are upper servers that manage the operation of the train
- 5-3 and 8-3 are in the train Management server for controlling each network device
- 5-4 to 8-4 face the moving direction of the vehicle
- camera A for photographing the vicinity of the right entrance door
- 5-5 to 8-5 face the moving direction of the vehicle
- 5-6 to 8-6 are recording devices for recording images acquired by the cameras of the respective vehicles
- 5-7 and 8-7 are monitors for displaying images in the train
- 5-8 to 8-8 are network switches for connecting upper networks.
- the vehicle 5 and the vehicle 8 are vehicles having a driver's seat, and are respectively network switches 5-1 and 8-4, upper servers 5-2 and 8-2, management servers 5-3 and 8-3, and a camera A5-4. 8-4, cameras B5-5, 8-5, recording devices 5-6, 8-6, monitors 5-7, 8-7, and network switches 5-8, 8-8. Each network device is connected via network switches 5-1 and 8-1.
- the vehicle 6 and the vehicle 7 are vehicles that do not have a driver's seat, and are respectively network switches 6-1 and 7-1, cameras A6-4 and 7-4, cameras B6-5 and 7-5, and a recording device 6-.
- each network device is connected via a network switch 6-1 and 7-1 via a network such as a LAN.
- the network switches 1 are connected to each other, and the network switch 4-1 of the vehicle 4 and the network switch 5-1 of the vehicle 5 are connected, so that the monitoring composed of the vehicle 1 to the vehicle 8 is performed.
- the network switches 8 are connected to each other, and the network switch 4-8 of the vehicle 4 and the network switch 5-8 of the vehicle 5 are connected to each other.
- the host server 2 and the management server 3 are mounted on the vehicle 1, the vehicle 4, the vehicle 5, and the vehicle 8, respectively, but one of them is the main and the other is the sub.
- the main controls and manages each network device, and the sub does not operate to control other devices.
- the management server is assumed to have the smallest IP address value given by the host server 2 and the fast processing. In this embodiment, it is assumed that the upper server 1-2 and the management server 1-3 operate as mains.
- a network including a camera above the broken line is a monitoring network
- a network including a higher server below the broken line is a higher network.
- the host network is a network related to the entire railway vehicle system
- the monitoring network is a network related to a monitoring system using video of the railway vehicle.
- the upper network and the monitoring network are divided by a subnet mask and connected via a management server.
- the management server 3 has a port on the monitoring network side and a port on the upper network side, and manages both networks separately by VLAN, and all communication between the upper network and the monitoring network is performed by the management server 3. Made by.
- the host network is connected mainly to a vehicle operation (not shown) including the host server 2 and the management server 3, and the monitoring network includes the management server 3, the network switch 1, the camera A4, the camera B5, the recording device 6, And a device related to video monitoring including the monitor 7 is connected.
- FIG. 14 is used to explain the flow of construction of the network within the organization of the monitoring system and the setting of the management system at the time of train vehicle connection.
- the host server 1-2 While the train is operating, the host server 1-2 periodically notifies the main management server 1-3 and the sub-management server 4-3 of the operation information by multicast (S21).
- the management server 1-3 confirms the received operation information each time, and confirms whether there is a connection flag (S22). If there is no connection flag in the operation information (No), the main management server 1-3 waits for reception of the next operation information as it is, and proceeds to S21. On the other hand, if there is a connection flag in the operation information (Yes), the process proceeds to S23.
- the main management server 1-3 prepares for vehicle connection according to the connection flag (S23). The regular notification of operation information from the host server 1-2 stops when the vehicle is connected.
- This preparation means that the main management server 1-3 and the sub-management server 4-3 stop the notification of operation information. Do not judge it as an abnormal situation.
- the upper server 1-2 notifies the main management server 1-3 of a monitoring network initialization command (S24).
- the main management server 1-3 releases (deletes) the IP address of each network device of the monitoring network and initializes the address management information (S25). At this time, the main / sub setting of the management server 3 is also canceled.
- the host network starts preparing the equipment for operation again, and in the process, the host server 1-2 uses DHCP to manage the server 1-3, the server 4-3, and the server 5-3 and the management server 8-3 are assigned IP addresses on the upper network side (S1 ′). Subsequently, the upper server 1-2 notifies the operation information to the management server 1-3, the management server 4-3, the management server 5-3, and the management server 8-3 (S2 ′).
- the management server 1-3, the management server 4-3, the management server 5-3, and the management server 8-3 use the vehicle ID in the operation information received based on the vehicle ID configuration information stored in advance. Analyzing and referring to the device configuration information for each vehicle type stored in advance, the IP address of each network device is calculated, and an address management table as a management table of the network device is created (S3 ′).
- the management server 1-3, the management server 4-3, the management server 5-3, and the management server 8-3 each determine whether or not broadcast management information has been received from a management server 3 other than itself (S4 ′). If it has not been received (No), it recognizes itself as the main management server (S5 ′), and sends the management information created based on the operation information by broadcast to the monitoring network (S6 ′) and receives it. If (Yes), it recognizes itself as a sub-management server (S11 ′) and waits (S12 ′).
- the management information packet including its own IP address is transmitted to the monitoring network. Broadcast to each network device (S6 ').
- the management server 1-3 having a small IP address value and faster processing has broadcast the management information first, and the management server 1-3 is the main server, the management server 4-3, and the management server. It is assumed that 5-3 and the management server 8-3 are subs.
- the main management apparatus 1-3 determines whether responses have been received from all network devices (S7 ′). If responses have been received from all network devices (Yes), the response to the upper server 1-2 including the status information of each network device is made by multicast (S8 '), and whether operation information has been received from the upper server. Judgment is made (S9 '). If the operation information has been received (Yes), the process proceeds to S6 ′, and if not received (No), S9 ′ is repeated until it is received. If no response has been received from all network devices in S7 ′ (No), the process proceeds to S10 ′ to determine whether a predetermined time has elapsed (S10 ′). If the predetermined time has elapsed (Yes), there is no response. If the predetermined time has not elapsed (No), the process proceeds to S7 'and waits for a response from an unresponsive network device.
- the management server 1-3 When the management server 1-3 establishes a communicable state within the monitoring network, the management server 1-3 notifies the host server 1-2 that the communicable state is established. When the preparation of the in-train system other than the monitoring network is completed, the train operation starts (operation).
- connection flag of the present embodiment when the separation of the vehicle occurs, only the connection flag of the present embodiment is changed to the separation flag, and when the separation and the connection of the vehicle occur, both the connection flag and the separation flag are notified. Is done.
- the connection flag and the separation flag have been described separately. However, the connection flag and the separation flag may be notified as a vehicle reorganization flag without being clearly divided into each.
- the communication method of the upper network and the monitoring network at the normal time and the abnormal time described with reference to FIGS. 3 to 12 in the first embodiment can be applied almost as it is to the second embodiment.
- four management servers are mounted in one organization, but when the main and sub of the management server are switched, the IP address value is the smallest among the three sub management servers.
- the sub-management server that is fast in processing becomes the main management server.
- the monitoring network to be divided is (a) a monitoring network of one main management server and three sub management servers, and (b) a monitoring network of one main management server and one sub management server and two sub management servers.
- C a monitoring network of one main management server and two sub management servers and a monitoring network of one sub management server.
- the main management server operates as the main as it is, and the sub management server in the other monitoring network is mainly operated by the sub management server having the smallest IP address value and the fastest processing.
- the main management server continues to operate as the main, and only one sub management server in the other monitoring network takes over the main role.
- the main management server operates as a main as it is, and when only one sub management server exists in the divided monitoring network, the sub management server is If there are a plurality of sub management servers, the sub management server with the smallest IP address value and the fastest processing takes over the main role. However, if the monitoring network is divided into a plurality of parts without including the management server, the monitoring network not including the management server must be separated.
- the monitoring network when a network is reconstructed by connecting or separating trains, the monitoring network can be quickly reconstructed and unified system management is possible. Thereby, the operation of the railway vehicle can be resumed quickly.
- the configuration of the system or apparatus according to the present invention is not necessarily limited to the above-described configuration, and various configurations may be used.
- the present invention can also be provided as, for example, a method or method for executing the processing according to the present invention, a program for realizing such a method or method, or a recording medium for recording the program. It is also possible to provide various systems and devices.
- the application field of the present invention is not necessarily limited to the above-described fields, and the present invention can be applied to various fields.
- one train is composed of four vehicles.
- the train is not limited to four vehicles, and trains having different numbers of vehicles are connected to each other. Cases are also conceivable. There is no special change in each process just because the number of vehicles has changed.
- the camera it is supposed to shoot near the door, but it is not limited to this, for example, it may shoot the state of the deck, the cabin or the outside of the vehicle, the video is always recorded or displayed, You may make it record or display by selection of operators, such as a driver.
- the number of cameras is two for one vehicle for convenience of explanation, but may be one or three or more. Further, the number of other recording devices and monitors is not particularly limited, and other different devices other than these may be mounted.
- the IP when determining the main management server, determining the management server to be replaced with the main from among the sub management servers, or determining the sub management server acting as the main from among the sub management servers, the IP Although it was decided to determine the sub-management server with a small address value and fast processing, it is not limited to this, and it may be the management server of the leading vehicle or the management server closest to the leading vehicle based on the operation information. The management server with the smallest number may be used, and any other method may be used as long as it is uniquely determined.
- management information transmitted from the main management server or the sub management server acting as the main to the monitoring network is transmitted by broadcast, it may be transmitted by multicast.
- the present invention can be applied not only to railway vehicles but also to other systems where a plurality of predetermined unit systems including network devices are connected or separated, and is effective.
- 1, 2, 3, 4, 5, 6, 7, 8 Vehicle, 1-1, 2-1, 3-1, 4-1, 5-1, 6-1, 7-1, 8-1: Network switch, 1-2, 4-2, 5-2, 8-2: upper server, 1-3, 4-3, 5-3, 8-3: management server, 1-4, 2-4, 3 -4, 4-4, 5-4, 6-4, 7-4, 8-4: Camera A, 1-5, 2-5, 3-5, 4-5, 5-5, 6-5 7-5, 8-5: Camera B, 1-6, 2-6, 3-6, 4-6, 5-6, 6-6, 7-6, 8-6: Recording device, 1-7, 4-7, 5-7, 8-7: Monitor, 1-8, 2-8, 3-8, 4-8, 5-8, 6-8, 7-8, 8-8: Network switch.
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Abstract
Description
本発明に係る編成内ネットワークシステムまたは編成内ネットワークシステム管理方法では、1以上の車両で構成され、ネットワーク機器と前記ネットワーク機器を管理する少なくとも管理装置とが搭載される編成の編成内ネットワークシステムにおいて、前記管理装置は、編成内のネットワークに関する第一の情報を取得し、当該第一の情報に関連して自身がメインとなる管理装置であるか否かを判断し、メインとなったメイン管理装置が前記ネットワーク機器を制御する。
図1において、1~4は車両であり1編成の列車を構成する。なお、ここでは図1中の矢印の方向を進行方向とする。1-1~4-1は各ネットワーク機器を接続し車両間の監視ネットワークを接続するネットワークスイッチ、1-2,4-2は列車の運行を管理する上位サーバ、1-3,4-3は編成内の各ネットワーク機器を制御する管理サーバ、1-4~4-4は車両の進行方向を向いて右側の乗降ドア付近を撮影するカメラA、1-5~4-5は車両の進行方向を向いて左側の乗降ドア付近を撮影するカメラB、1-6~4-6は各車両のカメラが取得した映像を記録する記録装置、1-7,4-7は編成内の映像などを表示するモニタ、1-8~4-8は車両間の上位ネットワークを接続するネットワークスイッチであり、それぞれLAN(Local Area Network)などのネットワークによって接続されている。ここでは進行方向の先頭車両に搭載されるモニタであるモニタ1-7にカメラA4またはカメラB5の映像を表示させることとするが、後尾車両モニタ4-7にも表示させるようにしてもいい。また、ネットワークスイッチは、パケット転送機能とSNMP(Simple Network Management Protocol)クライアント機能が備わっていればL2スイッチやスイッチングハブやルータなどどのようなタイプを用いてもよい。
図2は、列車起動時および運行時の管理サーバによる編成内監視ネットワークの管理方法を示すフローチャートである。
また、管理情報とは、映像とともに記録するメタデータである時刻や位置情報や車両番号などといった情報を含んでおり、送信元管理サーバ3がメインである旨のフラグなどを含んでもよい。
列車が進行方向に向かって運行を開始すると、上位サーバ1-2は管理サーバ1-3および管理サーバ4-3に対して定期的に運行情報を送信し、メイン管理サーバ1-3はこの運行情報に基づいて管理情報を各ネットワーク機器に対して送信する。各ネットワーク機器は管理情報に返信する形で、自身の状態情報をSNMPのTrapでメイン管理サーバ1-3へ直接的または間接的に返信する。メイン管理サーバ1-3は各ネットワーク機器のTrapに基づいて上位サーバ1-2へ応答する。
ネットワークスイッチには、異常が発生したり電源が停止したりすると、ポートを短絡させる機能を有しているものが存在するが、そういったネットワークスイッチを用いる場合には、特定の車両のネットワーク機器のみTrapの応答が無くなる。このような場合には、メイン管理サーバ1-3は、特定の車両のTrap応答がない旨を、上位サーバへの応答に含めて上位ネットワーク内へマルチキャスト送信する。
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