CN102638477A - Method for finding railway track monitoring sensor network controller - Google Patents
Method for finding railway track monitoring sensor network controller Download PDFInfo
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- CN102638477A CN102638477A CN2011100365613A CN201110036561A CN102638477A CN 102638477 A CN102638477 A CN 102638477A CN 2011100365613 A CN2011100365613 A CN 2011100365613A CN 201110036561 A CN201110036561 A CN 201110036561A CN 102638477 A CN102638477 A CN 102638477A
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Abstract
The invention relates to the technical field of information and communication, and in particular relates to a method for finding a railway track monitoring sensor network controller, which comprises the step that: when acquiring an address list of the railway track monitoring sensor network controller, a railway track monitoring sensing access multiplexing device needs to detect whether the obtained railway track monitoring sensor network controller is correctly communicated, and selects one railway track monitoring sensor network controller capable of being correctly communicated as a network access and control device. The invention provides the method for finding the railway track monitoring sensor network controller, thus the detection of the railway track monitoring sensing access multiplexing device is facilitated, and an accessable railway track monitoring sensor network controller in a network is selected to be used as the network access and control device which becomes one of railway track monitoring sensor network topology controlled by the railway track monitoring sensor network controller.
Description
Technical field
The present invention relates to communication network, relate in particular to a kind of railroad track monitoring sensing network controller discover method in the railroad track monitoring sensing network.
Background technology
Continuous speed-raising along with railway transportation; Requirement to railway track safety is also increasingly high; All kinds of parameters of railroad track, as: rail temperature, rail stress, track sedimentation, track deformation, or the like in time the obtaining of information, help accurately to judge the rail state; Control train running speed is guaranteed safety of railway transportation.But because the railroad track monitoring range is big, environment is harsh, does not also have the suitable technique means to solve the real-time monitoring problem of railroad track parameter on a large scale at present.
The radio sensing network technology can be utilized super low-power consumption sensor senses environmental parameter, and realizes wireless networking, in time transmits the information of being gathered.But present wireless sensing network technology also concentrates on the small scale network design basically, can't be applicable to the target of railroad track monitoring.
In order to solve the railroad track monitoring problem, as shown in Figure 1, a kind of railroad track monitoring sensing network architecture and serial networking equipment based on the radio sensing network technology is suggested, thereby can set up extensive railroad track monitoring sensing network effectively.
Railroad track monitoring sensing network comprises novel networking equipments such as railroad track monitoring sensor node, railroad track monitoring sensing access and multiplexing device, railroad track monitoring sensing network controller, railroad track monitoring gateway; Through the layering networking mode; Can manage, control the railroad track monitoring sensor node more than 100,000, realize the real-time monitoring of railroad track parameter on a large scale.
Railroad track monitoring sensing network controller can be regarded as one group of logical device, has realized the functions such as management, monitoring, dynamic-configuration, control of railroad track monitoring sensing network.Railroad track monitoring sensing access and multiplexing device is the control appliance of the railroad track monitoring sensing network in the local scope; It is realized the topology maintenance of the monitoring of the railroad track in local scope sensing network and the management control of railroad track monitoring sensor node under the control of railroad track monitoring sensing network controller.Railroad track monitoring gateway is responsible for realizing the distribution of railroad track monitoring sensing network controller and railroad track monitoring sensing access and multiplexing device; Monitoring sensing access and multiplexing device dynamic assignment for the railroad track in the railroad track monitoring network can be its railroad track monitoring sensing network controller that network insertion and control service are provided, and is that railroad track monitoring sensor node dynamic assignment can be its railroad track monitoring sensing access and multiplexing device that network insertion and control service are provided.
After railroad track monitoring sensing access and multiplexing device starts; It can obtain sign and the IP address information that the railroad track monitoring sensing network controller of network insertion and control service can be provided for it through the static configuration mode, also can monitor sensing network controller dynamic assignment flow process through railroad track and obtain sign and the IP address information that the railroad track monitoring sensing network controller of network insertion and control service can be provided for it from railroad track monitoring gateway.In order to prevent railroad track monitoring sensing network controller Single Point of Faliure; Generally speaking; Can two optional railroad track monitoring sensing network controllers be provided for railroad track monitoring sensing access and multiplexing device in the railroad track monitoring sensing network; A conduct master uses control appliance, and one as subsequent use control appliance.
Summary of the invention
After the startup of railroad track monitoring sensing access and multiplexing device, can obtain railroad track monitoring sensing network controller list through the mode that reads the static configuration mode or monitor the sensing network controller for its dynamic assignment railroad track through request railroad track monitoring gateway.
After having obtained railroad track monitoring sensing network controller list; Whether railroad track monitoring sensing access and multiplexing device needs the railroad track monitoring sensing network controller in the detection list can correctly be communicated with, and in railroad track monitoring sensing network controller list, selects a railroad track monitoring sensing network controller that can correctly be communicated with as its network insertion and control appliance.
The present invention is directed to railroad track monitoring sensing network architecture shown in Figure 1; A kind of discover method of railroad track monitoring sensing network controller has been proposed; Thereby the railroad track monitoring sensing network controller that helps railroad track monitoring sensing access and multiplexing device to detect and select can insert in the network is used as its network insertion and control appliance, thereby becomes a member in the railroad track monitoring sensing network topology that said railroad track monitoring sensing network controller controlled.
According to a first aspect of the invention, a kind of discover method of railroad track monitoring sensing network controller is provided, has it is characterized in that:
(1) railroad track monitoring sensing access and multiplexing device is at the Discovery Status that can get into railroad track monitoring sensing network controller under two kinds of situation: after a. railroad track monitoring sensing access and multiplexing device starts; Through read the static configuration mode or through request railroad track monitoring gateway for after the mode of its dynamic assignment railroad track monitoring sensing network controller obtains railroad track monitoring sensing network controller list, need monitor the sensing network controller list the available railroad track monitoring sensing network controller of detections from railroad track and set up the network connection; B. after railroad track is monitored the sensing access and multiplexing device and the railroad track monitoring sensing network controller communication that has been connected is connected interruption; Railroad track monitoring sensing access and multiplexing device need rediscover the railroad track monitoring sensing network controller that can insert, and sets up the network connection with it.
(2) generally, railroad track monitoring sensing access and multiplexing device can be come respectively main with network access equipment and backup network access device as it with railroad track monitoring sensing network controller and subsequent use railroad track monitoring sensing network controller by configuration simultaneously is main.
(3) railroad track monitoring sensing access and multiplexing device always can at first be attempted and lead with railroad track monitoring sensing network controller and carry out discovery procedure; If railroad track monitoring sensing access and multiplexing device successfully receives autonomous master with railroad track monitoring sensing network controller to find response message with railroad track monitoring sensing network controller, then successfully finish the discovery procedure of railroad track monitoring sensing network controller.
(4) if railroad track monitoring sensing access and multiplexing device is carried out the discovery procedure failure with main with railroad track monitoring sensing network controller; To select subsequent use railroad track monitoring sensing network controller to carry out railroad track monitoring sensing network controller and find flow process, whether can be communicated with to check subsequent use railroad track monitoring sensing network controller.
According to a second aspect of the invention, provide a kind of railroad track monitoring sensing network controller to find request message.Railroad track monitoring sensing network controller finds that institute's loaded information comprises in the request message: find type, railroad track monitoring sensing access and multiplexing device hardware description unit, railroad track monitoring sensing access and multiplexing device description unit.Wherein, find that type is used to represent the acquisition methods of railroad track monitoring sensing network controller address; The hardware description information that railroad track monitoring sensing access and multiplexing device hardware description unit is used to carry railroad track monitoring sensing access and multiplexing device; Railroad track monitoring sensing access and multiplexing device description unit is used to carry other descriptor of railroad track monitoring sensing access and multiplexing device, like: device hardware version number, equipment firmware version number, device boots program version number, cryptographic capabilities parameter or the like.
Railroad track monitoring sensing network controller finds that request message is used for detecting the railroad track monitoring sensing network controller that network can insert by railroad track monitoring sensing access and multiplexing device.The essential information that railroad track monitoring sensing network controller is found to transmit railroad track monitoring sensing access and multiplexing device in the request message is to railroad track monitoring sensing network controller.A railroad track monitoring sensing access and multiplexing device must provide these information to railroad track monitoring sensing network controller, to guarantee railroad track monitoring sensing network controller it is carried out correct control.
According to a third aspect of the invention we, provide a kind of railroad track monitoring sensing network controller to find response message.Railroad track monitoring sensing network controller finds that with railroad track monitoring sensing network controller response message is used as the railroad track monitoring sensing network controller that receives is found replying of request message.Railroad track monitoring sensing network controller finds that institute's loaded information comprises in the response message: railroad track monitoring sensing network controller identifier, railroad track monitoring sensing network controller description unit.Wherein, railroad track monitoring sensing network controller identifier is represented the network internal identification number of railroad track monitoring sensing network controller; Railroad track monitoring sensing network controller description unit is used to carry railroad track monitoring sensing network controller descriptor.
According to a forth aspect of the invention, provide a kind of master to find request message with railroad track monitoring sensing network controller.The master finds that with railroad track monitoring sensing network controller institute's loaded information comprises in the request message: find that type, railroad track are monitored sensing access and multiplexing device hardware description unit, railroad track is monitored sensing access and multiplexing device description unit.Wherein, find that type is used to represent the acquisition methods of railroad track monitoring sensing network controller address; The hardware description information that railroad track monitoring sensing access and multiplexing device hardware description unit is used to carry railroad track monitoring sensing access and multiplexing device; Railroad track monitoring sensing access and multiplexing device description unit is used to carry other descriptor of railroad track monitoring sensing access and multiplexing device, like: device hardware version number, equipment firmware version number, device boots program version number, cryptographic capabilities parameter or the like.
Whether railroad track monitoring sensing access and multiplexing device sends the master and can correctly be communicated with railroad track monitoring sensing network controller with the master that railroad track monitoring sensing network controller discovery request message detects it.When railroad track monitoring sensing access and multiplexing device has been currently connected on the subsequent use railroad track monitoring sensing network controller,, railroad track monitoring sensing access and multiplexing device mainly finds that with railroad track monitoring sensing network controller request message checks whether its master has become connected state with railroad track monitoring sensing network controller but periodically sending.
According to a fifth aspect of the invention, provide a kind of master to find response message with railroad track monitoring sensing network controller.Railroad track monitoring sensing network controller finds that with railroad track monitoring sensing network controller response message is used as the master who receives is found replying of request message with railroad track monitoring sensing network controller with main.The master finds that with railroad track monitoring sensing network controller institute's loaded information comprises in the response message: railroad track monitoring sensing network controller identifier, railroad track monitoring sensing network controller description unit.Wherein: railroad track monitoring sensing network controller identifier is represented the network internal identification number of railroad track monitoring sensing network controller; Railroad track monitoring sensing network controller description unit is used to carry railroad track monitoring sensing network controller descriptor.
The main railroad track monitoring sensing network controller that uses finds that response message provides a kind of as railroad track monitoring sensing network controller and can monitor the mechanism of its service ability of sensing access and multiplexing device advertisement to it being configured to the main railroad track that connects with the request of railroad track monitoring sensing network controller.
According to a sixth aspect of the invention, a kind of railroad track monitoring sensing access and multiplexing device hardware description unit is provided.Railroad track monitoring sensing access and multiplexing device hardware description unit is used to railroad track monitoring sensing network controller and finds that request message and master find in the request message with railroad track monitoring sensing network controller, are used to carry the hardware description information of railroad track monitoring sensing access and multiplexing device.Railroad track monitoring sensing access and multiplexing device hardware description unit comprises: device fabrication identification of the manufacturer, railroad track monitoring sensing access and multiplexing device sequence number, railroad track monitoring sensing access and multiplexing device MAC Address.Wherein, the device fabrication identification of the manufacturer is meant the identifier of railroad track monitoring sensing access and multiplexing device production firm; Railroad track monitoring sensing access and multiplexing device sequence number is used to carry the hardware sequence number of railroad track monitoring sensing access and multiplexing device; Railroad track monitoring sensing access and multiplexing device MAC Address is used to carry the mac address information of railroad track monitoring sensing access and multiplexing device.
According to a seventh aspect of the invention, a kind of railroad track monitoring sensing access and multiplexing device description unit is provided.Railroad track monitoring sensing access and multiplexing device description unit is used to railroad track monitoring sensing network controller and finds that request message and master find in the request message with railroad track monitoring sensing network controller, are used to carry the descriptor of railroad track monitoring sensing access and multiplexing device.Railroad track monitoring sensing access and multiplexing device description unit comprises: parameter type, parameter value length, parameter value.Wherein: parameter type is used to represent the parameter type that carries in the parameter codomain; Parameter value length is represented the length word joint number in parameter value territory; Parameter value is represented the value information of designated parameter type.Parameter type, parameter value length, parameter value three sub-domain are used to carry all kinds of parameter informations of railroad track monitoring sensing access and multiplexing device, as: railroad track monitoring sensing access and multiplexing device hardware version numbers, railroad track monitoring sensing access and multiplexing device firmware version number, railroad track monitoring sensing access and multiplexing device cryptographic capabilities parameter, or the like.
According to an eighth aspect of the invention, a kind of railroad track monitoring sensing network controller description unit is provided.Railroad track monitoring sensing network controller description unit is used to railroad track monitoring sensing network controller and finds that response message and master find in the response message with railroad track monitoring sensing network controller, are used to carry the descriptor of railroad track monitoring sensing network controller.Railroad track monitoring sensing network controller description unit comprises: current rail track monitoring sensor node quantity, railroad track monitoring sensor node restricted number, railroad track monitoring sensing access and multiplexing device quantity, railroad track monitoring sensing access and multiplexing device restricted number, safety certificate type, DTLS strategy, reservation territory, parameter type, parameter value length, parameter value.Wherein: current rail track monitoring sensor node quantity is meant the present railroad track monitoring sensor node number of managing of said railroad track monitoring sensing network controller; Railroad track monitoring sensor node restricted number is meant the railroad track monitoring sensor node quantity that said railroad track monitoring sensing network controller maximum can be managed; Railroad track monitoring sensing access and multiplexing device quantity is meant the present railroad track monitoring sensing access and multiplexing device quantity that connects of said railroad track monitoring sensing network controller; Railroad track monitoring sensing access and multiplexing device restricted number is meant the railroad track monitoring sensing access and multiplexing device quantity that said railroad track monitoring sensing network controller maximum can connect; The safety certificate type is meant the safety certificate mode that railroad track monitoring sensing network controller is supported; The DTLS strategy is meant whether the transfer of data between railroad track monitoring sensing network controller and railroad track monitoring sensing access and multiplexing device uses the DTLS cipher mode; Keep the information field that the territory is meant that expansion will be kept for future; Parameter type is used to represent the parameter type that carries in the parameter codomain; Parameter value length is represented the length word joint number in parameter value territory; Parameter value is represented the value information of designated parameter type.
Generally, railroad track monitoring sensing access and multiplexing device can be come respectively main with network access equipment and backup network access device as it with railroad track monitoring sensing network controller and subsequent use railroad track monitoring sensing network controller by configuration simultaneously is main.Railroad track monitoring sensing access and multiplexing device always can at first be attempted and lead with railroad track monitoring sensing network controller and carry out discovery procedure.
According to a ninth aspect of the invention, provide and disposed main the monitoring with railroad track under the sensing network controller situation, main with the discovery procedure of railroad track monitoring sensing network controller.Wherein, may further comprise the steps:
A) railroad track monitoring sensing access and multiplexing device sends the master and monitors sensing network controller to main with railroad track with railroad track monitoring sensing network controller discovery request message;
B) railroad track monitoring sensing network controller receive main find request message with railroad track monitoring sensing network controller after, send and mainly find that with railroad track monitoring sensing network controller response message gives said railroad track monitoring sensing access and multiplexing device.
If the master that railroad track monitoring sensing access and multiplexing device successfully receives from railroad track monitoring sensing network controller finds response message with railroad track monitoring sensing network controller, then successfully finish the discovery procedure of railroad track monitoring sensing network controller.Otherwise, will select subsequent use railroad track monitoring sensing network controller to carry out railroad track monitoring sensing network controller and find flow process, whether can be communicated with to check subsequent use railroad track monitoring sensing network controller.
According to the tenth aspect of the invention, provide under main situation with the connection failure of railroad track monitoring sensing network controller, subsequent use railroad track monitoring sensing network controller is found flow process.Wherein, may further comprise the steps:
A) railroad track monitoring sensing access and multiplexing device forwarding railway track monitoring sensing network controller finds that request message is to subsequent use railroad track monitoring sensing network controller;
B) railroad track monitoring sensing network controller is after receiving railroad track monitoring sensing network controller discovery request message, and forwarding railway track monitoring sensing network controller discovery response message is given said railroad track monitoring sensing access and multiplexing device.
If railroad track monitoring sensing access and multiplexing device successfully receives from the railroad track monitoring sensing network controller of subsequent use railroad track monitoring sensing network controller and finds response message; Then successfully finish the discovery procedure of railroad track monitoring sensing network controller; And select subsequent use railroad track monitoring sensing network controller as its network insertion and control appliance, carry out follow-up network insertion flow process.
According to an eleventh aspect of the invention; If railroad track monitoring sensing access and multiplexing device is at discovery procedure of above-mentioned subsequent use railroad track monitoring sensing network controller and the main discovery response message that does not all receive in the discovery procedure of sensing network controller from any railroad track monitoring sensing network controller of monitoring with railroad track; Then railroad track monitoring sensing access and multiplexing device can't get into the further work state; It need be after waiting one section delay time; Restart railroad track monitoring sensing network controller and find flow process or main with railroad track monitoring sensing network controller discovery flow process, till detecting available railroad track monitoring sensing network controller.
Adopt scheme of the present invention; The railroad track monitoring sensing network controller that railroad track monitoring sensing access and multiplexing device can detect and select can insert in the network is used as its network insertion and control appliance, thereby becomes a member in the railroad track monitoring sensing network topology that railroad track monitoring sensing network controller controlled.
Description of drawings
Through with reference to the detailed description of being done below the advantages to non-limiting example, other features, objects and advantages of the present invention will become more obvious.Illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the system architecture diagram of railroad track monitoring sensing network;
Fig. 2 shows the structural representation according to the railroad track monitoring sensing access and multiplexing device hardware description unit of a specific embodiment of the present invention;
Fig. 3 shows the structural representation according to the railroad track monitoring sensing access and multiplexing device description unit of a specific embodiment of the present invention;
Fig. 4 shows the structural representation according to the railroad track monitoring sensing network controller description unit of a specific embodiment of the present invention;
Fig. 5 shows the flow chart of monitoring the discovery procedure of sensing network controller according to the master of a specific embodiment of the present invention with railroad track;
Fig. 6 shows the flow chart according to the subsequent use railroad track monitoring sensing network controller discovery procedure of a specific embodiment of the present invention.
Wherein, same or analogous Reference numeral is represented same or analogous steps characteristic or device/module.
Embodiment
Below in conjunction with accompanying drawing, preferred implementation of the present invention is carried out detailed explanation.
As shown in Figure 1; In railroad track monitoring sensing network; Railroad track monitoring sensing access and multiplexing device 1, railroad track monitoring sensing access and multiplexing device 2, railroad track monitoring sensing access and multiplexing device 3, railroad track monitoring sensing access and multiplexing device n etc. are responsible for the railroad track monitoring sensor node in each local scope of control, organization and administration local sensing network respectively.Railroad track monitoring sensing network controller 1 is the main core control equipment of using of whole railroad track monitoring sensing network, is responsible for all the railroad track monitoring sensing access and multiplexing devices in the network are carried out control and management.Railroad track monitoring sensing network controller 2 is subsequent use control appliances of railroad track monitoring sensing network, and railroad track monitoring gateway 1 is responsible for realizing the dynamic assignment to railroad track monitoring sensing network controller and railroad track monitoring sensing access and multiplexing device.
After railroad track monitoring sensing access and multiplexing device 1 starts; It can obtain available railroad track monitoring sensing network controller list through method that reads static configuration or the mode of monitoring the sensing network controller for its dynamic assignment railroad track through request railroad track monitoring gateway 1; Comprise the address and the identification information of railroad track monitoring sensing network controller 1 and railroad track monitoring sensing network controller 2 in the railroad track monitoring sensing network controller list, wherein railroad track monitoring sensing network controller 1 is monitored sensing network controller 2 as subsequent use control appliance as main with control appliance, railroad track.
After this, railroad track monitoring sensing access and multiplexing device 1 needs to start the discovery procedure of railroad track monitoring sensing network controller, judges whether railroad track monitoring sensing network controller 1 or railroad track monitoring sensing network controller 2 can correctly be communicated with.Railroad track monitoring sensing access and multiplexing device 1 can at first start and the master of railroad track monitoring sensing network controller 1 monitors the discovery procedure of sensing network controller with railroad track; If this process is carried out failure, restart railroad track monitoring sensing network controller discovery procedure with railroad track monitoring sensing network controller 2.
When the interruption that is connected of railroad track monitoring sensing access and multiplexing device 1 and the original railroad track monitoring sensing network controller that inserts, then railroad track monitoring sensing access and multiplexing device 1 also can start the discovery procedure of railroad track monitoring sensing network controller.
Below, second aspect of the present invention is described, wherein, Fig. 1 and associated description thereof are incorporated herein by reference.
Railroad track monitoring sensing network controller finds that institute's loaded information comprises in the request message: find type, railroad track monitoring sensing access and multiplexing device hardware description unit, railroad track monitoring sensing access and multiplexing device description unit.Wherein:
Find that type is used to represent that railroad track monitoring sensing access and multiplexing device obtains the method for the address information of railroad track monitoring sensing network controller, 1 expression static configuration, 2 expressions are dynamically obtained.Static configuration method is meant the sign and the IP address of pre-configured primary, spare railroad track monitoring sensing network controller on railroad track monitoring sensing access and multiplexing device; After dynamically acquisition methods refers to that railroad track monitoring sensing access and multiplexing device starts, monitor sign and the IP address that gateway dynamically obtains primary, spare railroad track monitoring sensing network controller from railroad track through railroad track monitoring sensing network controller dynamic assignment agreement.
The hardware description information that railroad track monitoring sensing access and multiplexing device hardware description unit is used to carry railroad track monitoring sensing access and multiplexing device.
Railroad track monitoring sensing access and multiplexing device description unit is used to carry railroad track monitoring sensing access and multiplexing device descriptor, like: device hardware version number, equipment firmware version number, device boots program version number or the like.
Railroad track monitoring sensing network controller finds that request message is used to detect its subsequent use control appliance-railroad track monitoring sensing network controller 2 by railroad track monitoring sensing access and multiplexing device 1 and whether can correctly be communicated with.Railroad track monitoring sensing network controller finds that the basic descriptor of request message transmission railroad track monitoring sensing access and multiplexing device 1 is to railroad track monitoring sensing network controller 2.Railroad track monitoring sensing access and multiplexing device 1 must provide these information to railroad track monitoring sensing network controller 2, to guarantee railroad track monitoring sensing network controller 2 it is carried out correct control.
Below, the third aspect of the invention is described, wherein, Fig. 1 and associated description thereof are incorporated herein by reference.
Railroad track monitoring sensing network controller finds that with railroad track monitoring sensing network controller response message is used as the railroad track monitoring sensing network controller that receives is found replying of request message.Railroad track monitoring sensing network controller finds that institute's loaded information comprises in the response message: railroad track monitoring sensing network controller identifier, railroad track monitoring sensing network controller description unit.Wherein:
Railroad track monitoring sensing network controller identifier is represented the network internal identification number of railroad track monitoring sensing network controller.
Railroad track monitoring sensing network controller description unit is used to carry railroad track monitoring sensing network controller descriptor.
Railroad track is monitored the sensing network controller and is found that response message is that railroad track monitoring sensing network controller provides a kind of mechanism from its service ability of sensing access and multiplexing device advertisement to the railroad track that request connects that can monitor.
After railroad track monitoring sensing network controller 2 receives the railroad track monitoring sensing network controller discovery request message from railroad track monitoring sensing access and multiplexing device 1; Railroad track monitoring sensing network controller 2 forwarding railway tracks monitoring sensing network controller is found response message to railroad track monitoring sensing access and multiplexing device 1, carries the identification information of railroad track monitoring sensing network controller 2 and the description unit of railroad track monitoring sensing network controller 2 in the message.
Below, fourth aspect of the present invention is described, wherein, Fig. 1 and associated description thereof are incorporated herein by reference.
The master finds that with railroad track monitoring sensing network controller institute's loaded information comprises in the request message: find that type, railroad track are monitored sensing access and multiplexing device hardware description unit, railroad track is monitored sensing access and multiplexing device description unit.Wherein:
Find that type is used to represent that railroad track monitoring sensing access and multiplexing device obtains the method for the address information of railroad track monitoring sensing network controller, 1 expression static configuration, 2 expressions are dynamically obtained.Static configuration method is meant the IP address of pre-configured primary, spare railroad track monitoring sensing network controller on railroad track monitoring sensing access multiplexing; After dynamically acquisition methods refers to that railroad track monitoring sensing access and multiplexing device starts, monitor the IP address that gateway dynamically obtains primary, spare railroad track monitoring sensing network controller from railroad track through railroad track monitoring sensing network controller dynamic assignment agreement.
The hardware description information that railroad track monitoring sensing access and multiplexing device hardware description unit is used to carry railroad track monitoring sensing access and multiplexing device.
Railroad track monitoring sensing access and multiplexing device description unit is used to carry railroad track monitoring sensing access and multiplexing device descriptor, like: device hardware version number, equipment firmware version number, device boots program version number or the like.
Railroad track monitoring sensing access and multiplexing device 1 sends the master and finds that with railroad track monitoring sensing network controller request message detects the main of it and whether can correctly be communicated with control appliance-railroad track monitoring sensing network controller 1.In addition; When railroad track monitoring sensing access and multiplexing device 1 has been currently connected to 2 last times of subsequent use control appliance railroad track monitoring sensing network controller,, railroad track monitoring sensing access and multiplexing device 1 mainly finds that with railroad track monitoring sensing network controller request message checks that to railroad track monitoring sensing network controller 1 its master monitors the sensing network controller with railroad track and whether become connected state but periodically sending.
Below, the 5th aspect of the present invention is described, wherein, Fig. 1 and associated description thereof are incorporated herein by reference.
Railroad track monitoring sensing network controller finds that with railroad track monitoring sensing network controller response message is used as the master who receives is found with railroad track monitoring sensing network controller the response message of request message with main.
The master finds that with railroad track monitoring sensing network controller institute's loaded information comprises in the response message: railroad track monitoring sensing network controller identifier, railroad track monitoring sensing network controller description unit.Wherein:
Railroad track monitoring sensing network controller identifier is represented the network internal identification number of railroad track monitoring sensing network controller.
Railroad track monitoring sensing network controller description unit is used to carry railroad track monitoring sensing network controller descriptor.
The main railroad track monitoring sensing network controller that uses finds that response message provides a kind of as railroad track monitoring sensing network controller and can monitor the mechanism of its service ability of sensing access and multiplexing device advertisement to it being configured to the main railroad track that connects with the request of railroad track monitoring sensing network controller.
When railroad track monitoring sensing network controller 1 receives after master from railroad track monitoring sensing access and multiplexing device 1 finds request message with railroad track monitoring sensing network controller; Railroad track monitoring sensing network controller 1 sends the master and finds response message to railroad track monitoring sensing access and multiplexing device 1 with railroad track monitoring sensing network controller, carries the identification information of railroad track monitoring sensing network controller 1 and the description unit that railroad track is monitored sensing network controller 1 in the message.
Below, with reference to Fig. 2 the 6th aspect of the present invention is described, wherein, Fig. 1 and associated description thereof are incorporated herein by reference.
Railroad track monitoring sensing access and multiplexing device hardware description unit is used to railroad track monitoring sensing network controller and finds that request message and master find in the request message with railroad track monitoring sensing network controller, are used to carry the hardware description information of railroad track monitoring sensing access and multiplexing device.Railroad track monitoring sensing access and multiplexing device hardware description unit comprises: device fabrication identification of the manufacturer, railroad track monitoring sensing access and multiplexing device sequence number, railroad track monitoring sensing access and multiplexing device MAC Address.Wherein:
The device fabrication identification of the manufacturer is used to represent the identifier of railroad track monitoring sensing access and multiplexing device production firm.
Railroad track monitoring sensing access and multiplexing device sequence number is used to carry the hardware sequence number that railroad track is monitored the sensing access and multiplexing device.Each railroad track monitoring sensing access and multiplexing device all is configured a unique hardware sequence number when dispatching from the factory.
Railroad track monitoring sensing access and multiplexing device MAC Address is used to carry the mac address information that railroad track is monitored the sensing access and multiplexing device.
Below, with reference to Fig. 3 the 7th aspect of the present invention is described, wherein, Fig. 1 and associated description thereof are incorporated herein by reference.
Railroad track monitoring sensing access and multiplexing device description unit is used to railroad track monitoring sensing network controller and finds that request message and master find in the request message with railroad track monitoring sensing network controller, are used to carry the descriptor of railroad track monitoring sensing access and multiplexing device.
Railroad track monitoring sensing access and multiplexing device description unit comprises: parameter type, parameter value length, parameter value.Wherein:
Parameter type comprises: the firmware version number of 0-hardware version numbers, the current operation of 1-, 2-railroad track monitoring sensing access and multiplexing device boot version number, other firmware version number of 3-; As: railroad track monitoring sensing access and multiplexing device inoperative firmware version number; 4-railroad track monitoring sensing access and multiplexing device cryptographic capabilities, or the like.
Parameter value length is represented the length word joint number in parameter value territory.
Parameter value is represented the value information of designated parameter type.
A railroad track monitoring sensing access and multiplexing device description unit can carry a plurality of parametric description information simultaneously.
Below, with reference to Fig. 4 eight aspect of the present invention is described, wherein, Fig. 1 and associated description thereof are incorporated herein by reference.
Railroad track monitoring sensing network controller description unit is used to railroad track monitoring sensing network controller and finds that response message and master find in the response message with railroad track monitoring sensing network controller, are used to carry the descriptor of railroad track monitoring sensing network controller.
Railroad track monitoring sensing network controller description unit comprises: current rail track monitoring sensor node quantity, railroad track monitoring sensor node restricted number, current rail track monitoring sensing access and multiplexing device quantity, railroad track monitoring sensing access and multiplexing device restricted number, safety certificate type, DTLS strategy, reservation territory, parameter type, parameter value length, parameter value.Wherein:
Current rail track monitoring sensor node quantity is meant the present railroad track monitoring sensor node number of managing of said railroad track monitoring sensing network controller.
Railroad track monitoring sensor node restricted number is meant the railroad track monitoring sensor node quantity that said railroad track monitoring sensing network controller maximum can be managed.
Railroad track monitoring sensing access and multiplexing device quantity is meant the present railroad track monitoring sensing access and multiplexing device quantity that connects of said railroad track monitoring sensing network controller.
Railroad track monitoring sensing access and multiplexing device restricted number is meant the railroad track monitoring sensing access and multiplexing device quantity that said railroad track monitoring sensing network controller maximum can connect.
The safety certificate type is meant the safety certificate mode that railroad track monitoring sensing network controller is supported, wherein 1 representes x.509 certificate mode, and 2 represent shared key mode in advance.
The DTLS strategy is meant whether the transfer of data between railroad track monitoring sensing network controller and railroad track monitoring sensing access and multiplexing device uses the DTLS cipher mode, and wherein 1 representes plaintext transmission, and 2 expressions use DTLS to encrypt.
Keep the information field that the territory is meant that expansion will be kept for future.
Parameter type is represented the type of the parameter value that the parameter value territory is comprised, as: 1 expression railroad track monitoring sensing network controller hardware version number, 2 expression railroad track monitoring sensing network controller software version numbers, or the like.
Parameter value length is represented the length word joint number in parameter value territory.
Parameter value is represented the value information of designated parameter type.Can carry multiple self-defining railroad track monitoring sensing network controller parameter in the parameter codomain.
Generally, railroad track monitoring sensing access and multiplexing device can be come respectively main with network access equipment and backup network access device as it with railroad track monitoring sensing network controller and subsequent use railroad track monitoring sensing network controller by configuration simultaneously is main.Railroad track monitoring sensing access and multiplexing device always can at first be attempted and lead with railroad track monitoring sensing network controller and carry out the discovery flow process.
According to the embodiment of the invention, a kind of master is provided also the discovery flow process with railroad track monitoring sensing network controller.Below according to Fig. 5 and combine Fig. 1 to introduce this flow process.This flow process comprises following processing:
Step S10; Railroad track monitoring sensing access and multiplexing device 1 sends main main with control appliance-railroad track monitoring sensing network controller 1, the hardware description information and the device descriptive information of carrying railroad track monitoring sensing access and multiplexing device 1 in the message to it with railroad track monitoring sensing network controller discovery request message.
Step S11; Railroad track monitoring sensing network controller 1 receive main find request message with railroad track monitoring sensing network controller after; Send the master and find that with railroad track monitoring sensing network controller response message to railroad track monitoring sensing access and multiplexing device 1, carries the device descriptive information of railroad track monitoring sensing network controller 1 in the message.
If the master that railroad track monitoring sensing access and multiplexing device 1 successfully receives from railroad track monitoring sensing network controller 1 finds response message with railroad track monitoring sensing network controller; Then successfully finish the discovery procedure of railroad track monitoring sensing network controller, no longer carry out the discovery procedure of railroad track monitoring sensing network controller with other railroad track monitoring sensing network controllers.Otherwise; Whether railroad track monitoring sensing access and multiplexing device 1 will select subsequent use control appliance-railroad track monitoring sensing network controller 2 to carry out the discovery procedure of railroad track monitoring sensing network controller, can be communicated with inspection railroad track monitoring sensing network controller 2.
Under main situation with the connection failure of railroad track monitoring sensing network controller, railroad track monitoring sensing access and multiplexing device will be carried out the discovery procedure of subsequent use railroad track monitoring sensing network controller.
According to the embodiment of the invention, the discovery procedure of a kind of subsequent use railroad track monitoring sensing network controller is provided also.Below according to Fig. 6 and combine Fig. 1 to introduce this flow process.This flow process comprises following processing:
Step S20; Railroad track monitoring sensing access and multiplexing device 1 forwarding railway track monitoring sensing network controller finds that request message is to subsequent use control appliance-railroad track monitoring sensing network controller 2, the hardware description information and the device descriptive information of carrying railroad track monitoring sensing access and multiplexing device 1 in the message.
Step S21; Railroad track monitoring sensing network controller 2 is after receiving railroad track monitoring sensing network controller discovery request message; Forwarding railway track monitoring sensing network controller finds that response message to railroad track monitoring sensing access and multiplexing device 1, carries the device descriptive information of railroad track monitoring sensing network controller 2 in the message.
If railroad track monitoring sensing access and multiplexing device 1 successfully receives from the railroad track monitoring sensing network controller of railroad track monitoring sensing network controller 2 and finds response message; Then successfully finish the discovery procedure of railroad track monitoring sensing network controller; And select railroad track monitoring sensing network controller 2 as its network insertion and control appliance, carry out follow-up network insertion flow process.
Below, the of the present invention the tenth describes on the one hand, and wherein, Fig. 1 and associated description thereof are incorporated herein by reference.
If railroad track monitoring sensing access and multiplexing device 1 finds that at above-mentioned railroad track monitoring sensing network controller flow process and master find all not receive in the flow process railroad track monitoring sensing network controller discovery response message from any railroad track monitoring sensing network controller with railroad track monitoring sensing network controller; Then railroad track monitoring sensing access and multiplexing device can't get into the further work state; It need be after waiting one section delay time; Restart railroad track monitoring sensing network controller and find flow process or main with railroad track monitoring sensing network controller discovery flow process, till detecting available railroad track monitoring sensing network controller.The delay time that need wait can preestablish.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done is equal to replacement, improves etc., all should be included within protection scope of the present invention.
Claims (10)
1. the discover method of railroad track monitoring sensing network controller; Thereby the railroad track monitoring sensing network controller that helps can insert in the railroad track monitoring sensing access and multiplexing device detection network is used as its network insertion and control appliance, it is characterized in that:
A) after railroad track monitoring sensing access and multiplexing device starts; Through read the static configuration mode or through request railroad track monitoring gateway for after the mode of its dynamic assignment railroad track monitoring sensing network controller obtains railroad track monitoring sensing network controller list; Need the discovery procedure of execution railroad track monitoring sensing network controller, from railroad track monitoring sensing network controller list, detect available railroad track monitoring sensing network controller and set up the network connection;
B) after railroad track is monitored the sensing access and multiplexing device and the railroad track monitoring sensing network controller communication that has been connected is connected interruption; Railroad track monitoring sensing access and multiplexing device need be carried out the discovery procedure of railroad track monitoring sensing network controller; Rediscover the railroad track monitoring sensing network controller that can insert, and set up the network connection with it;
C) generally, railroad track monitoring sensing access and multiplexing device can be come respectively main with network access equipment and backup network access device as it with railroad track monitoring sensing network controller and subsequent use railroad track monitoring sensing network controller by configuration simultaneously is main;
D) railroad track monitoring sensing access and multiplexing device always can at first be attempted and lead with railroad track monitoring sensing network controller and carry out discovery procedure; If railroad track monitoring sensing access and multiplexing device successfully receives autonomous master with railroad track monitoring sensing network controller to find response message with railroad track monitoring sensing network controller; Then successfully finish the discovery procedure of railroad track monitoring sensing network controller, and select the master to monitor the sensing network controller as its network insertion and control appliance with railroad track;
E) if railroad track monitoring sensing access and multiplexing device is carried out the discovery procedure failure with main with railroad track monitoring sensing network controller; To select subsequent use railroad track monitoring sensing network controller to carry out the discovery procedure of railroad track monitoring sensing network controller, whether can be communicated with to check subsequent use railroad track monitoring sensing network controller;
F) if successfully receiving from the railroad track monitoring sensing network controller of subsequent use railroad track monitoring sensing network controller, railroad track monitoring sensing access and multiplexing device finds response message; Then successfully finish the discovery procedure of railroad track monitoring sensing network controller, and select subsequent use railroad track monitoring sensing network controller as its network insertion and control appliance;
G) if railroad track monitoring sensing access and multiplexing device is monitored the discovery response message that does not receive in the discovery procedure of sensing network controller from any railroad track monitoring sensing network controller in the discovery procedure of subsequent use railroad track monitoring sensing network controller with the master with railroad track; Then railroad track monitoring sensing access and multiplexing device can't get into the further work state; It need be after waiting one section delay time; Restart railroad track monitoring sensing network controller discovery procedure or main, till detecting available railroad track monitoring sensing network controller with the discovery procedure of railroad track monitoring sensing network controller.
2. the discover method of railroad track monitoring sensing network controller according to claim 1; Its characteristic also is; Disposing main the monitoring with railroad track under the sensing network controller situation, the master may further comprise the steps with the discovery procedure of railroad track monitoring sensing network controller:
A) railroad track monitoring sensing access and multiplexing device sends the master and monitors sensing network controller to main with railroad track with railroad track monitoring sensing network controller discovery request message;
B) railroad track monitoring sensing network controller receive main find request message with railroad track monitoring sensing network controller after, send and mainly find that with railroad track monitoring sensing network controller response message gives said railroad track monitoring sensing access and multiplexing device.
3. the discover method of railroad track monitoring sensing network controller according to claim 1; Its characteristic also is; Under main situation with the connection failure of railroad track monitoring sensing network controller, the discovery procedure of subsequent use railroad track monitoring sensing network controller may further comprise the steps:
A) railroad track monitoring sensing access and multiplexing device forwarding railway track monitoring sensing network controller finds that request message is to subsequent use railroad track monitoring sensing network controller;
B) railroad track monitoring sensing network controller is after receiving railroad track monitoring sensing network controller discovery request message, and forwarding railway track monitoring sensing network controller discovery response message is given said railroad track monitoring sensing access and multiplexing device.
4. subsequent use railroad track monitoring sensing network controller according to claim 3 discovery procedure, railroad track monitoring sensing network controller finds that request message is characterised in that:
A) railroad track monitoring sensing network controller finds that institute's loaded information comprises in the request message: find type, railroad track monitoring sensing access and multiplexing device hardware description unit, railroad track monitoring sensing access and multiplexing device description unit;
B) find that type is used to represent the acquisition methods of railroad track monitoring sensing network controller address, wherein, 1 expression static configuration method, the dynamic acquisition methods of 2 expressions;
C) railroad track monitoring sensing access and multiplexing device hardware description unit is used to carry the hardware description information that railroad track is monitored the sensing access and multiplexing device;
D) railroad track monitoring sensing access and multiplexing device description unit is used to carry other descriptor of railroad track monitoring sensing access and multiplexing device, like: device hardware version number, equipment firmware version number, device boots program version number or the like;
E) railroad track monitoring sensing network controller finds that request message is used for detecting the railroad track monitoring sensing network controller that network can insert by railroad track monitoring sensing access and multiplexing device; The essential information that railroad track monitoring sensing network controller is found to transmit railroad track monitoring sensing access and multiplexing device in the request message is carried out correct control to guarantee railroad track monitoring sensing network controller to it to railroad track monitoring sensing network controller.
5. subsequent use railroad track monitoring sensing network controller according to claim 3 discovery procedure, railroad track monitoring sensing network controller finds that response message is characterised in that:
A) railroad track monitoring sensing network controller finds that with railroad track monitoring sensing network controller response message is used as the railroad track monitoring sensing network controller that receives is found the response message of request message;
B) railroad track monitoring sensing network controller finds that institute's loaded information comprises in the response message: railroad track monitoring sensing network controller identifier, railroad track monitoring sensing network controller description unit;
C) railroad track monitoring sensing network controller identifier is represented the network internal identification number of railroad track monitoring sensing network controller;
D) railroad track monitoring sensing network controller description unit is used to carry railroad track monitoring sensing network controller descriptor.
6. master according to claim 2 is with the discovery procedure of railroad track monitoring sensing network controller, and the master finds that with railroad track monitoring sensing network controller request message is characterised in that:
A) master finds that with railroad track monitoring sensing network controller institute's loaded information comprises in the request message: find that type, railroad track are monitored sensing access and multiplexing device hardware description unit, railroad track is monitored sensing access and multiplexing device description unit;
B) find that type is used to represent the acquisition methods of railroad track monitoring sensing network controller address, wherein, 1 expression static configuration method, the dynamic acquisition methods of 2 expressions;
C) railroad track monitoring sensing access and multiplexing device hardware description unit is used to carry the hardware description information that railroad track is monitored the sensing access and multiplexing device;
D) railroad track monitoring sensing access and multiplexing device description unit is used to carry other descriptor of railroad track monitoring sensing access and multiplexing device, like: device hardware version number, equipment firmware version number, device boots program version number or the like;
E) whether railroad track monitoring sensing access and multiplexing device transmission master can correctly be communicated with railroad track monitoring sensing network controller with the master that railroad track monitoring sensing network controller discovery request message detects it.
7. master according to claim 2 is with the discovery procedure of railroad track monitoring sensing network controller, and the master finds that with railroad track monitoring sensing network controller response message is characterised in that:
A) railroad track monitoring sensing network controller finds that with railroad track monitoring sensing network controller response message is used as the master who receives is found with railroad track monitoring sensing network controller the response message of request message with main;
B) master finds that with railroad track monitoring sensing network controller institute's loaded information comprises in the response message: railroad track monitoring sensing network controller identifier, railroad track monitoring sensing network controller description unit;
C) railroad track monitoring sensing network controller identifier is represented the network internal identification number of railroad track monitoring sensing network controller;
D) railroad track monitoring sensing network controller description unit is used to carry railroad track monitoring sensing network controller descriptor.
8. according to claim 4 and 6 described message, railroad track monitoring sensing access and multiplexing device hardware description unit is characterised in that:
A) railroad track monitoring sensing access and multiplexing device hardware description unit is used to railroad track monitoring sensing network controller and finds that request message and master find in the request message with railroad track monitoring sensing network controller, are used to carry the hardware description information of railroad track monitoring sensing access and multiplexing device;
B) railroad track monitoring sensing access and multiplexing device hardware description unit comprises: device fabrication identification of the manufacturer, railroad track monitoring sensing access and multiplexing device sequence number, railroad track monitoring sensing access and multiplexing device MAC Address;
C) the device fabrication identification of the manufacturer is represented the identifier of railroad track monitoring sensing access and multiplexing device production firm;
D) railroad track monitoring sensing access and multiplexing device sequence number is used to carry the hardware sequence number of railroad track monitoring sensing access and multiplexing device;
E) railroad track monitoring sensing access and multiplexing device MAC Address is used to carry the mac address information of railroad track monitoring sensing access and multiplexing device.
9. according to claim 4 and 6 described message, railroad track monitoring sensing access and multiplexing device description unit is characterised in that:
A) railroad track monitoring sensing access and multiplexing device description unit is used to railroad track monitoring sensing network controller and finds that request message and master find in the request message with railroad track monitoring sensing network controller, are used to carry the descriptor of railroad track monitoring sensing access and multiplexing device;
B) railroad track monitoring sensing access and multiplexing device description unit comprises: parameter type, parameter value length, parameter value;
C) parameter type is used to represent the parameter type that carries in the parameter codomain;
D) parameter value length is represented the length word joint number in parameter value territory;
E) parameter value is represented the value information of designated parameter type;
F) parameter type, parameter value length, parameter value three sub-domain are used to carry all kinds of logic parameter information of railroad track monitoring sensing access and multiplexing device, as: railroad track monitoring sensing access and multiplexing device hardware version numbers, railroad track monitoring sensing access and multiplexing device firmware version number, or the like.
10. according to claim 5 and 7 described message, railroad track monitoring sensing network controller description unit is characterised in that:
A) railroad track monitoring sensing network controller description unit is used to railroad track monitoring sensing network controller and finds that response message and master find in the response message with railroad track monitoring sensing network controller, are used to carry the descriptor of railroad track monitoring sensing network controller;
B) railroad track monitoring sensing network controller description unit comprises: current rail track monitoring sensor node quantity, railroad track monitoring sensor node restricted number, railroad track monitoring sensing access and multiplexing device quantity, railroad track monitoring sensing access and multiplexing device restricted number, safety certificate type, DTLS strategy, reservation territory, parameter type, parameter value length, parameter value;
C) current rail track monitoring sensor node quantity is meant the present railroad track monitoring sensor node number of managing of said railroad track monitoring sensing network controller;
D) railroad track monitoring sensor node restricted number is meant the railroad track monitoring sensor node quantity that said railroad track monitoring sensing network controller maximum can be managed;
E) railroad track monitoring sensing access and multiplexing device quantity is meant the present railroad track monitoring sensing access and multiplexing device quantity that connects of said railroad track monitoring sensing network controller;
F) railroad track monitoring sensing access and multiplexing device restricted number is meant the railroad track monitoring sensing access and multiplexing device quantity that said railroad track monitoring sensing network controller maximum can connect;
G) the safety certificate type is meant the safety certificate mode that railroad track monitoring sensing network controller is supported;
H) the DTLS strategy is meant whether the transfer of data between railroad track monitoring sensing network controller and railroad track monitoring sensing access and multiplexing device uses the DTLS cipher mode;
I) keep the information field that the territory is meant that expansion will be kept for future;
J) parameter type is used to represent the parameter type that carries in the parameter codomain;
K) parameter value length is represented the length word joint number in parameter value territory;
L) parameter value is represented the value information of designated parameter type.
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Application publication date: 20120815 |