CN102843444A - Method for applying wireless priority based on IP (internet protocol) address in train control system - Google Patents
Method for applying wireless priority based on IP (internet protocol) address in train control system Download PDFInfo
- Publication number
- CN102843444A CN102843444A CN2012103367117A CN201210336711A CN102843444A CN 102843444 A CN102843444 A CN 102843444A CN 2012103367117 A CN2012103367117 A CN 2012103367117A CN 201210336711 A CN201210336711 A CN 201210336711A CN 102843444 A CN102843444 A CN 102843444A
- Authority
- CN
- China
- Prior art keywords
- address
- control system
- subnet
- train control
- train
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses a method for applying wireless priority based on an IP (internet protocol) address in a train control system. The method is characterized in that a sub-network and a corresponding IP address are distributed to wireless train control system equipment; safety equipment is considered as a safety sub-network, and a non-safety equipment is considered as a non-safety sub-network; and the data of the safety sub-network is preferentially transmitted through a wireless channel. With the adoption of the method disclosed by the invention, the wireless transmission mode in the data communication subsystem is optimized based on the property of the information transmission of the train control system.
Description
Technical field
The invention belongs to the Train Control field, be mainly used in according to the IP address and divide the priority of confirming data message in the train control system, guarantee the preferential real-time Transmission of security control information.
Background technology
Along with informationalized development, the feeler of the communication technology, computer technology has extended to each corner of social life.Automation in any field, information-based leap all be unable to do without these technological supports, and train signal control field is no exception.Train control system (CBTC) based on communication is exactly to carry out Train Control through continuous, two-way train-ground communication, thus the increasing substantially of realization train safe property and system's conevying efficiency.At present, the CBTC technology also becomes the mainstream technology of train control system.
Train-ground communication adopts the CBTC system of wireless mode to be called wireless CBTC system.The basic characteristics of wireless CBTC system are: confirm train position through continuous train-ground communication rather than through track circuit.A train-installed controller is searched their orientation, and is measured from the previous transponder that the detects distance of traveling through the decision of the transponder on detection track train position in database.Train-installed controller is through using the position of train to other two-way wireless communication this train of CBTC device report by rail of rail.Two-way communication has also been strengthened the operation of train and supervision.Therefore, train can move with shorter running interval, and improve the flexibility of Train Control under assurance and other train safes situation at interval.
Wireless train control system mainly is divided into three layers in logic: management level, operation layer and execution level.Management level mainly provide train control and monitoring function automatically.Logical operations such as operation layer is passed through the operational system Control Software, and responsible train safe interval, train permissible velocity and route are chain.Operation result sends to performance element with the form of communication message through data communication subsystem.Execution level mainly is divided into two parts, other control appliance of rail and onboard control device.Its major function is the instruction of explaining from operation layer, and controls train at interval according to these instruction setting train speeds and train safe, transmits the data such as state of position, speed, traffic direction and the Vehicle Controller of relevant train simultaneously and gives operation layer.The entity of each layer carries out the mutual of information through data communication subsystem (DCS).
See from the security attribute of data; Information transmitted relates to safe control information between operation layer and the execution level; What transmit between management level and operation layer and management level and the execution level then is not relate to safe information; Therefore, should guarantee the prioritised transmission of security control information as the data communication subsystem of information transmitting medium.A data communication network is shared in the transmission in train control system of all security information and non-vital data, and adopts identical transfer of data grade, does not embody the priority of secure data yet at present.
Data between the other equipment of operation layer and execution level rail are through the cable network transmission, and the data between operation layer and the execution level mobile unit are then through cable network and wireless network co-transmitted.Cable network has enough advantages on bandwidth; Its priority also can be provided with (QoS (Quality of Service) service quality through the QoS in the mature protocol simultaneously; Being a kind of security mechanism of network, is with a kind of technology that solves problems such as network delay and obstruction.To key application and multimedia application, when network over loading or when congested, QoS can guarantee that the important service amount is not postponed or abandons, and guarantees the efficient operation of network simultaneously) realize.Therefore, particularly security control data of data transfer bandwidth and time delay in wireless network often becomes and passes judgment on one of good and bad key factor of whole data communication network performance.How according to the characteristics of train control system, guarantee the prioritised transmission of security control data in the wireless network part, realizing that end-to-end priority control becomes needs the problem that solves.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method of in train control system, using based on the Radio priority level of IP address, and it can optimize the wireless transmission method in the data communication subsystem to the characteristics of train control system message transmission.
In order to solve above technical problem; The invention provides a kind of method of in train control system, using based on the Radio priority level of IP address; It is characterized in that; Be wireless train control system devices allocation subnet and corresponding IP address, safety means are divided into safe subnet, and non-safety means are divided into non-safe subnet; Data at wireless channel prioritised transmission safety subnet.
Beneficial effect of the present invention is: to the characteristics of train control system message transmission, optimize the wireless transmission method in the data communication subsystem.Issue the instruction of Vehicle Controller for Regional Control Center; And Vehicle Controller passes back to the relevant security control data such as state of relevant train position, speed, traffic direction and the Vehicle Controller of Regional Control Center, guarantees its prioritised transmission in wireless network.
Be the IP address of the same subnet of management level devices allocation, become non-safe subnet.
IP address for the same subnet of devices allocation of operation layer and execution level becomes safe subnet.
The equipment of said execution level comprises Region control equipment, the other control appliance of rail and onboard control device.
Source address and destination address to packet are analyzed, and are the high priority that the packet of safe subnet is mapped to the MAC layer with source address and destination address, in the wireless channel prioritised transmission.
Through rail side and onboard wireless unit the source address and the destination address of packet are analyzed.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further explain.
Accompanying drawing 1 is based on IP address Radio priority level implementation sketch map;
Accompanying drawing 2 is end-to-end time delay sketch mapes of message transmission between Region control equipment and the onboard control device;
Accompanying drawing 3 is wireless train control system exemplary plot.
Embodiment
The present invention is directed to the characteristics of train control system message transmission, optimize the wireless transmission method in the data communication subsystem.Issue the instruction of Vehicle Controller for Regional Control Center; And Vehicle Controller passes back to the relevant security control data such as state of relevant train position, speed, traffic direction and the Vehicle Controller of Regional Control Center, guarantees its prioritised transmission in wireless network.
The present invention is according to the logical construction of wireless train control system; Be the IP address (non-safe IP subnet) of the same subnet of management level devices allocation, distribute (comprising Region control equipment, the other control appliance of rail and onboard control device) the IP address (safe IP subnet) of same subnet for the equipment of operation layer and execution level.
Belonging to what transmit between the equipment of safe subnet is security control information, needs to guarantee prioritised transmission.For the Wireless Telecom Equipment in the data communication system, through subnet under source IP address in the analyzing IP packet and the purpose IP address, attribute that can analysis and judgement information simultaneously according to certain dispatching algorithm, guarantees the prioritised transmission of security control information.For the Wireless Telecom Equipment in the data communication subsystem (other wireless access point AP of rail and vehicle-mounted mobile radio unit STA), after having increased the semantic conversion module and scheduler module that possesses above-mentioned functions, can confirm and realize data priority:
Semantic conversion module: analyze the source IP address of packet and the subnet under the purpose IP address,, be mapped to different MAC layer grades (for example, being set at 8 grades) according to IEEE802.1P according to the type of affiliated subnet.In general, the train safe control information must be mapped to the limit priority of MAC layer.Then can be mapped to the inferior priority of MAC layer for other supervision and management information of train control system.Simultaneously, then can be mapped to lower priority for the information such as train video monitoring that might merge in the future.
Scheduler module:,, and distribute different weights for each MAC layer grade is safeguarded corresponding formation based on the MAC dispatching algorithm.Because the weight of different brackets frame is different, thus their select to keep out of the way the time delay average expectation also different.Like this, when Channel Detection arrives the free time, the average waiting short time delay of high-grade frame, access probability is bigger.
The present invention is through the semantic conversion of IP address and MAC layer grade mapping, and the MAC dispatching algorithm, has guaranteed that the secure data that source IP address and purpose IP address all belong to safe subnet can transmit with the time delay of minimum.
Through IP address-based Radio priority level control; Guaranteed that train control system security control data can prioritised transmission at wireless portion; The propagation delay time of security control data can satisfy the requirement of train control system safe operation, has promoted the train control system performance.
Region control equipment with operation layer is transmitted as example to the security control information between the onboard control device of execution level; Through Radio priority level control, can guarantee that data transmission delay is controlled in the 10ms end to end: network switch time delay 0.5ms in the station in the cable network; The average delay of VPN equipment is 1.6ms; Backbone switches generally has the time delay of 1ms because quantity is more; The other wireless access internal institution of rail switch uses storage and preceding favourable turn system, under medium communication flows situation, will cause the delay of average 0.8ms; The average out to 6ms of the time delay of other wireless access unit of rail and vehicle-mounted mobile radio unit.
With wireless train control system shown in the accompanying drawing 3 is example.
The first step is for equipment in the wireless train control system carries out the planning of IP address.Be the IP address (non-safe IP subnet) of the same subnet of management level devices allocation, distribute (comprising Region control equipment, the other control appliance of rail and onboard control device) the IP address (safe IP subnet) of same subnet for the equipment of operation layer and execution level.
In second step, improve the other and onboard wireless unit of rail.According to increasing semantic conversion module and scheduler module shown in the accompanying drawing 1.Source IP address and the purpose IP address affiliated subnet of semantic conversion module through analyzing packet according to the type of affiliated subnet, is mapped to different MAC layer grades, and the information mapping between the wherein safe subnet equipment is to the highest MAC priority.Scheduler module when Channel Detection arrives the free time, preferentially sends to wireless channel with high-grade frame through dispatching algorithm.
According to the invention through the control of IP address-based Radio priority level, the message transmission that guarantees to belong between the equipment of safe subnet is transmitted with limit priority, and the following priority transmission of other information.And then the propagation delay time in wireless network part of security control category information also satisfies the service requirement of train control system in the assurance train control system, realizes priority control end to end.These information comprise: train safe interval, train permissible velocity, train position, current of traffic and the chain operation result of route etc.
The present invention is not limited to the execution mode that preceding text are discussed.More than the description of embodiment is intended in order to describe and explain the technical scheme that the present invention relates to.Based on the conspicuous conversion of the present invention enlightenment or substitute and also should be considered to fall into protection scope of the present invention.Above embodiment is used for disclosing best implementation method of the present invention, so that those of ordinary skill in the art can use numerous embodiments of the present invention and multiple alternative reaches the object of the invention.
Claims (6)
1. method of in train control system, using based on the Radio priority level of IP address; It is characterized in that; Be wireless train control system devices allocation subnet and corresponding IP address, safety means are divided into safe subnet, and non-safety means are divided into non-safe subnet; Data at wireless channel prioritised transmission safety subnet.
2. the method for in train control system, using based on the Radio priority level of IP address as claimed in claim 1 is characterized in that, is the IP address of the same subnet of management level devices allocation, becomes non-safe subnet.
3. the method for in train control system, using based on the Radio priority level of IP address as claimed in claim 1 is characterized in that, the IP address for the same subnet of devices allocation of operation layer and execution level becomes safe subnet.
4. the method for in train control system, using based on the Radio priority level of IP address as claimed in claim 3 is characterized in that, the equipment of said execution level comprises Region control equipment, the other control appliance of rail and onboard control device.
5. the method for in train control system, using based on the Radio priority level of IP address as claimed in claim 4; It is characterized in that; Source address and destination address to packet are analyzed; With source address and destination address is the high priority that the packet of safe subnet is mapped to the MAC layer, in the wireless channel prioritised transmission.
6. the method for in train control system, using based on the Radio priority level of IP address as claimed in claim 5 is characterized in that, through rail side and onboard wireless unit the source address and the destination address of packet is analyzed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210336711.7A CN102843444B (en) | 2012-09-12 | 2012-09-12 | In train control system, apply the method for IP address-based Radio priority level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210336711.7A CN102843444B (en) | 2012-09-12 | 2012-09-12 | In train control system, apply the method for IP address-based Radio priority level |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102843444A true CN102843444A (en) | 2012-12-26 |
| CN102843444B CN102843444B (en) | 2016-05-04 |
Family
ID=47370496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210336711.7A Active CN102843444B (en) | 2012-09-12 | 2012-09-12 | In train control system, apply the method for IP address-based Radio priority level |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102843444B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104702717A (en) * | 2015-04-03 | 2015-06-10 | 上海自仪泰雷兹交通自动化系统有限公司 | Planning method for IP addresses of data communication system in CBTC |
| CN112319551A (en) * | 2020-11-10 | 2021-02-05 | 交控科技股份有限公司 | Wireless communication method and system for train carriage |
| US11716372B2 (en) | 2019-10-01 | 2023-08-01 | Honeywell International Inc. | Method and system for centralized management of access subnetwork selection for mobile platform communications |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1700632A (en) * | 2004-05-19 | 2005-11-23 | 株式会社日立制作所 | Information transmission system |
| CN101350134A (en) * | 2008-08-29 | 2009-01-21 | 同济大学 | Mechanism and system for transmitting vehicle emergency message based on DSRC |
-
2012
- 2012-09-12 CN CN201210336711.7A patent/CN102843444B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1700632A (en) * | 2004-05-19 | 2005-11-23 | 株式会社日立制作所 | Information transmission system |
| CN101350134A (en) * | 2008-08-29 | 2009-01-21 | 同济大学 | Mechanism and system for transmitting vehicle emergency message based on DSRC |
Non-Patent Citations (1)
| Title |
|---|
| 张晴: "基于改进蚁群算法的系统可靠性分配及其应用研究", 《万方数据知识服务平台》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104702717A (en) * | 2015-04-03 | 2015-06-10 | 上海自仪泰雷兹交通自动化系统有限公司 | Planning method for IP addresses of data communication system in CBTC |
| CN104702717B (en) * | 2015-04-03 | 2018-01-12 | 上海自仪泰雷兹交通自动化系统有限公司 | The planing method of data communication system IP address in CBTC |
| US11716372B2 (en) | 2019-10-01 | 2023-08-01 | Honeywell International Inc. | Method and system for centralized management of access subnetwork selection for mobile platform communications |
| CN112319551A (en) * | 2020-11-10 | 2021-02-05 | 交控科技股份有限公司 | Wireless communication method and system for train carriage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102843444B (en) | 2016-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106314487B (en) | Capacity based on dynamic interval can configure train operation control system and method | |
| CN105407027B (en) | Train network control system | |
| Banerjee et al. | A survey of wireless communication technologies & their performance for high speed railways | |
| CN105704740A (en) | Train vehicle-ground communication network system | |
| CN105636145A (en) | 1.8GHz-based TD-LTE (Time Division Long Term Evolution) system used for subway rail communication | |
| CN101820655B (en) | RBC soft handoff method in CTCS-3 train control system | |
| CN103701718B (en) | Dynamic buffer allocation method for transformer substation communication network switches | |
| CN203968139U (en) | Train network control system | |
| CN107911847A (en) | Parallel WLAN and LTE system and application method in train-ground communication | |
| CN104580295A (en) | Intelligent broadband communication method and system used for high-speed train in moving state | |
| CN108834103A (en) | The big data of rail traffic LTE-M communication system Train Control business transmission monitors system and method | |
| CN102209366B (en) | Vehicle-mounted communication method and system | |
| US20130158742A1 (en) | System and method for communicating in a transportation network | |
| CN111182499A (en) | High-speed railway train comprehensive control networking and working method thereof | |
| CN105691416B (en) | A kind of rail transit train information system based on wireless Mesh netword | |
| CN109756904A (en) | A kind of 5G super-intensive wireless access network deployment system and its virtual subdistrict update method | |
| CN102843444B (en) | In train control system, apply the method for IP address-based Radio priority level | |
| CN110505601A (en) | Information transmission frequency optimization method based on vehicle driving situation field model in a kind of car networking | |
| CN201550133U (en) | Train integrated management intelligent system | |
| CN101568019A (en) | Double-network redundant rail transit field video transmission system | |
| CN104065515A (en) | Multi-loop system for DCS system | |
| Bandara et al. | Providing wireless bandwidth for high-speed rail operations | |
| CN110072211A (en) | A kind of rail traffic communication means, apparatus and system | |
| CN104469812A (en) | Detecting system for railway LTE network | |
| CN212572975U (en) | High-speed railway train integrated control networking |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |