CN104852976A - Train-ground communication system response method, on-board monitoring terminal and ground communication node - Google Patents
Train-ground communication system response method, on-board monitoring terminal and ground communication node Download PDFInfo
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- CN104852976A CN104852976A CN201510213721.5A CN201510213721A CN104852976A CN 104852976 A CN104852976 A CN 104852976A CN 201510213721 A CN201510213721 A CN 201510213721A CN 104852976 A CN104852976 A CN 104852976A
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Abstract
The invention provides a train-ground communication system response method, an on-board monitoring terminal and a ground communication node. The method comprises the following steps: launching an exploration signal to the ground in real time; receiving an exploration response signal returned by a ground communication node AP; after the exploration response signal returned by the ground communication node AP is received, converting the current working mode into a signal receiving mode and receiving at least one data packet sent by the AP; sending a reception success response signal to the ground after each data packet is received successfully; and if the at least data packet sent by the AP is not received in a preset period of time, converting the current working mode into a signal emitting mode and continuing launching an exploration signal to the ground. The problem of train-ground data transmission in a train-ground communication system is solved effectively, the timeliness of train-ground communication information is realized, a high-speed train train-ground communication system is enabled to better adapt to high speed, high density and large passenger flow of railway passenger dedicated lines, and the safety of train operation is ensured.
Description
Technical field
The present invention relates to train-ground communication technical field, particularly relate to a kind of answer method of land mobile communication system, vehicle monitor terminal and ground communication node.
Background technology
Along with the communication technology particularly radiotechnics develop rapidly, people begin one's study the bullet train land mobile communication system based on the communication technology, land mobile communication system utilize radio communication reliably, transmission vehicle ground bidirectional information in real time, train in running by wireless self the state information such as position, speed of center transmission earthward in real time.The information such as preceding object thing, temporary speed limitation are sent to train by radio communication by center, ground.Train, according to real-time computational speed curves of information such as preceding object thing information, Train Parameters, line parameter circuit values, controls train and runs under safe speed.
Bullet train land mobile communication system is intended to when train operation, and environmental monitoring early warning information circuit periphery being affected train operation transfers on train in time, effectively.
Realizing in process of the present invention, inventor finds at least there is following problem in prior art:
There is the problem such as time delay, packet loss in the information of existing land mobile communication system, affects traffic safety to a certain extent.
Summary of the invention
In view of the above problems, propose the present invention to provide a kind of answer method of land mobile communication system, vehicle monitor terminal and the ground communication node that overcome the problems referred to above or solve or slow down the problems referred to above at least in part, make train-ground communication information more timely and effective, thus ensure train operating safety.
On the one hand, provide a kind of answer method of bullet train land mobile communication system, described method comprises:
Launch earthward in real time and seek signal;
What the communication node AP receiving ground returned seeks answer signal;
The communication node AP receiving ground return seek answer signal after, be signal receiving modes by current working mode change, and receive described AP send at least one packet;
Send one all earthward after each receives data packets success and receive successful respond signal;
When not receiving the packet that described AP sends in Preset Time, being then signal emission mode by current working mode change, continuing to launch earthward to seek signal.
Wherein, described method also comprises:
According to the operational factor of current bullet train, described Preset Time is set.
On the other hand, provide a kind of answer method of bullet train land mobile communication system, described method comprises:
What real-time reception vehicle monitor terminal SA launched seeks signal;
Seek answer signal according to described signal of seeking to described SA transmission, and be signal emission mode by current working mode change;
The data that this locality stores are sent to described SA, and receive the reception successful respond signal of described SA for each Packet Generation;
When the packet of the predetermined number sent continuously all do not receive receive successful respond signal time, be then signal receiving modes by current working mode change.
Wherein, described method also comprises:
Receive the data that ground controller is sent by total switch, described data send with broadcast mode or mode of unicast.
Wherein, the described data by this locality storage are sent to described SA, are specially: in a broadcast manner the data that this locality stores are sent to described SA.
On the other hand, provide a kind of vehicle monitor terminal, described vehicle monitor terminal comprises:
Seeking signal transmitter unit, seeking signal for launching earthward in real time;
Seek answer signal receiving element, what the communication node AP for receiving ground returned seeks answer signal;
First mode converting unit, for return at the communication node AP receiving ground seek answer signal after, be signal receiving modes by current working mode change;
Data receipt unit, under signal receiving modes, receives at least one packet that described AP sends;
Receiving successful respond signal transmitter unit, receiving successful respond signal for sending one all earthward after each receives data packets success;
Current working mode change for when not receiving the packet that described AP sends in Preset Time, is then signal emission mode by the second mode switching unit.
Wherein, described vehicle monitor terminal also comprises:
Setting unit, for arranging described Preset Time according to the operational factor of current bullet train.
On the other hand, provide a kind of ground communication node, described ground communication node comprises:
Seek Signal reception end member, that launches for real-time reception vehicle monitor terminal SA seeks signal;
Seeking answer signal transmitting element, seeking answer signal for seeking signal described in basis to described SA transmission;
Three-mode converting unit, for described seek answer signal transmitting element send seek answer signal after, be signal emission mode by current working mode change;
Data transmission unit, the data for being stored this locality are sent to described SA;
Receive successful respond signal receiving unit, for receiving the reception successful respond signal of described SA for each Packet Generation;
Current working mode change when receiving successful respond signal for all not receiving when the packet of the predetermined number sent continuously, is then signal receiving modes by four-mode converting unit.
Wherein, described ground communication node also comprises:
Ground data receiving element, for receiving the data that ground controller is sent by total switch, described data send with broadcast mode or mode of unicast.
Wherein, the data that this locality stores are sent to described SA by described data transmission unit in a broadcast manner.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
The present invention is in bullet train land mobile communication system link, merge train-ground communication acknowledgement mechanism, efficiently solve car ground data transmission problems in land mobile communication system, achieve the promptness of train-ground communication information, thus make bullet train land mobile communication system adapt to the feature of special line for passenger trains high speed, high density, large passenger flow better, ensure train operating safety.
Accompanying drawing explanation
Can understanding the features and advantages of the present invention clearly by reference to accompanying drawing, accompanying drawing is schematic and should not be construed as and carry out any restriction to the present invention, in the accompanying drawings:
The answer method flow chart of a kind of bullet train land mobile communication system that Fig. 1 provides for the embodiment of the present invention;
The answer method flow chart of a kind of bullet train land mobile communication system that Fig. 2 provides for another embodiment of the present invention;
The structured flowchart of a kind of vehicle monitor terminal that Fig. 3 provides for the embodiment of the present invention; And
The structured flowchart of a kind of ground communication node that Fig. 4 provides for the embodiment of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The answer method flow chart of a kind of bullet train land mobile communication system that Fig. 1 provides for the embodiment of the present invention, as shown in Figure 1, the method comprises the following steps:
S11, real-time transmitting earthward seek signal;
S12, receive that the communication node AP on ground returns seek answer signal;
S13, the communication node AP receiving ground return seek answer signal after, be signal receiving modes by current working mode change, and receive described AP send at least one packet;
Send one all earthward after S14, each receives data packets success and receive successful respond signal;
S15, when not receiving the packet that described AP sends in Preset Time, be then signal emission mode by current working mode change, continue to launch earthward to seek signal.
The embodiment of the present invention, by setting up acknowledgement mechanism between vehicle monitor terminal and ground communication node, efficiently solve car ground data transmission problems in land mobile communication system, achieve the promptness of train-ground communication information, thus make bullet train land mobile communication system adapt to the feature of special line for passenger trains high speed, high density, large passenger flow better, ensure train operating safety.
Further, the answer method of bullet train land mobile communication system that the embodiment of the present invention provides also comprises:
According to the operational factor of current bullet train, described Preset Time is set.
The embodiment of the present invention, by the operational factor according to current bullet train, as, the speed of service, described Preset Time is set, judge that whether vehicle monitor terminal is away from the ground communication node communicated before by this time threshold, and carry out the switching of vehicle monitor terminal mode of operation according to judged result, prepare the data accepting next ground communication node.
Further, current working mode change is then signal emission mode by the step S15 in the embodiment of the present invention: when not receiving the packet that described AP sends in Preset Time, continues to launch earthward to seek signal, specifically comprises:
The time receiving the packet that described AP sends from last time is initial time, judge the packet whether again receiving described AP transmission in Preset Time, when not receiving the packet that described AP sends in Preset Time, be then signal emission mode by current working mode change, continue to launch earthward to seek signal.
In the embodiment of the present invention, vehicle monitor terminal (SA) whole process is launched earthward and is sought signal, when receive ground communication node (AP) seek answer signal after transfer signal receiving modes to, receive the data that AP sends, and after a receives data packets success, send a reception successful respond signal earthward; AP whole process is in signal receiving modes, when receive that SA launches seek signal after to send to SA and seek answer signal, then the data that this locality stores are sent to SA, and often send a packet to SA and can receive one and receive successful respond signal; When SA does not receive AP data within a certain period of time, then think away from AP, switch to emission state, prepare the data receiving next AP; The packet sending some as AP does not continuously receive reception successful respond signal, then think that train passes through, and switches to accepting state.
The answer method flow chart of a kind of bullet train land mobile communication system that Fig. 2 provides for the embodiment of the present invention, as shown in Figure 2, the method comprises the following steps:
What S21, real-time reception vehicle monitor terminal SA launched seeks signal;
Seek signal described in S22, basis and seek answer signal to described SA transmission, and be signal emission mode by current working mode change;
S23, the data that this locality stores are sent to described SA, and receive the reception successful respond signal of described SA for each Packet Generation;
S24, when the packet of the predetermined number sent continuously all do not receive receive successful respond signal time, be then signal receiving modes by current working mode change.
Further, the answer method of bullet train land mobile communication system that the embodiment of the present invention provides also comprises:
Receive the data that ground controller is sent by total switch, described data send with broadcast mode or mode of unicast.
Further, the described data by this locality storage are sent to described SA, are specially: in a broadcast manner the data that this locality stores are sent to described SA.
In the embodiment of the present invention, AP whole process is in signal receiving modes, answer signal is sent to SA when receiving seeking after signal that SA launches, then the data that this locality stores are sent to SA, often send a packet to SA and can receive a reception successful respond, then repeat S202, the packet sending some as AP does not continuously receive response message, then think that train passes through, and switches to accepting state.
The embodiment of the present invention, by setting up acknowledgement mechanism between vehicle monitor terminal and ground communication node, efficiently solve car ground data transmission problems in land mobile communication system, achieve the promptness of train-ground communication information, thus make bullet train land mobile communication system adapt to the feature of special line for passenger trains high speed, high density, large passenger flow better, ensure train operating safety.
The structured flowchart of a kind of vehicle monitor terminal that Fig. 3 provides for the embodiment of the present invention, as shown in Figure 3, described vehicle monitor terminal comprises:
Seeking signal transmitter unit 11, seeking signal for launching earthward in real time;
Seek answer signal receiving element 12, what the communication node AP for receiving ground returned seeks answer signal;
First mode converting unit 13, for return at the communication node AP receiving ground seek answer signal after, be signal receiving modes by current working mode change;
Data receipt unit 14, under signal receiving modes, receives at least one packet that described AP sends;
Receiving successful respond signal transmitter unit 15, receiving successful respond signal for sending one all earthward after each receives data packets success;
Current working mode change for when not receiving the packet that described AP sends in Preset Time, is then signal emission mode by the second mode switching unit 16.
In the embodiment of the present invention, vehicle monitor terminal communication mechanism flow process is as follows:
Vehicle monitor terminal (SA) whole process is launched earthward and is sought signal, when transferring signal receiving modes to after the response receiving ground communication node (AP), receive the data that AP sends, and after a receives data packets success, send a reception successful respond earthward; When SA does not receive AP data within a certain period of time, then think away from AP, switch to emission state, prepare the data receiving next AP.
Further, described vehicle monitor terminal also comprises:
Setting unit, for arranging described Preset Time according to the operational factor of current bullet train.
The structured flowchart of a kind of ground communication node that Fig. 4 provides for the embodiment of the present invention, as shown in Figure 4, described ground communication node comprises:
Seek Signal reception end member 21, that launches for real-time reception vehicle monitor terminal SA seeks signal;
Seeking answer signal transmitting element 22, seeking answer signal for seeking signal described in basis to described SA transmission;
Three-mode converting unit 23, for described seek answer signal transmitting element send seek answer signal after, be signal emission mode by current working mode change;
Data transmission unit 24, the data for being stored this locality are sent to described SA;
Receive successful respond signal receiving unit 25, for receiving the reception successful respond signal of described SA for each Packet Generation;
Current working mode change when receiving successful respond signal for all not receiving when the packet of the predetermined number sent continuously, is then signal receiving modes by four-mode converting unit 26.
In the embodiment of the present invention, ground communication node communication mechanism flow process is as follows:
Ground communication node (AP) whole process is in signal receiving modes, when receive that vehicle monitor terminal (SA) launches seek signal after send answer signal to SA, then by this locality store data send to SA, and often to SA send a packet can receive one receive successful respond; The packet sending some as AP does not continuously receive response message, then think that train passes through, switch to accepting state.
Further, described ground communication node also comprises:
Ground data receiving element, for receiving the data that ground controller is sent by total switch, described data send with broadcast mode or mode of unicast.
Further, the data that this locality stores are sent to described SA by described data transmission unit in a broadcast manner.
In sum, the embodiment of the present invention is in bullet train land mobile communication system link, merge train-ground communication acknowledgement mechanism, efficiently solve car ground data transmission problems in land mobile communication system, achieve the promptness of train-ground communication information, thus make bullet train land mobile communication system adapt to the feature of special line for passenger trains high speed, high density, large passenger flow better, ensure train operating safety.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention can by hardware implementing, and the mode that also can add necessary general hardware platform by software realizes.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions and perform method described in each embodiment of the present invention in order to make a computer equipment (can be personal computer, server, or the network equipment etc.).
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the system in embodiment can carry out being distributed in the system of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more systems being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.
Be only several specific embodiment of the present invention above, but the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (10)
1. an answer method for bullet train land mobile communication system, is characterized in that, described method comprises:
Launch earthward in real time and seek signal;
What the communication node AP receiving ground returned seeks answer signal;
The communication node AP receiving ground return seek answer signal after, be signal receiving modes by current working mode change, and receive described AP send at least one packet;
Send one all earthward after each receives data packets success and receive successful respond signal;
When not receiving the packet that described AP sends in Preset Time, being then signal emission mode by current working mode change, continuing to launch earthward to seek signal.
2. method according to claim 1, is characterized in that, described method also comprises:
According to the operational factor of current bullet train, described Preset Time is set.
3. an answer method for bullet train land mobile communication system, is characterized in that, described method comprises:
What real-time reception vehicle monitor terminal SA launched seeks signal;
Seek answer signal according to described signal of seeking to described SA transmission, and be signal emission mode by current working mode change;
The data that this locality stores are sent to described SA, and receive the reception successful respond signal of described SA for each Packet Generation;
When the packet of the predetermined number sent continuously all do not receive receive successful respond signal time, be then signal receiving modes by current working mode change.
4. method according to claim 3, is characterized in that, described method also comprises:
Receive the data that ground controller is sent by total switch, described data send with broadcast mode or mode of unicast.
5. the method according to claim 3 or 4, is characterized in that, the described data by this locality storage are sent to described SA, are specially:
In a broadcast manner the data that this locality stores are sent to described SA.
6. a vehicle monitor terminal, is characterized in that, described vehicle monitor terminal comprises:
Seeking signal transmitter unit, seeking signal for launching earthward in real time;
Seek answer signal receiving element, what the communication node AP for receiving ground returned seeks answer signal;
First mode converting unit, for return at the communication node AP receiving ground seek answer signal after, be signal receiving modes by current working mode change;
Data receipt unit, under signal receiving modes, receives at least one packet that described AP sends;
Receiving successful respond signal transmitter unit, receiving successful respond signal for sending one all earthward after each receives data packets success;
Current working mode change for when not receiving the packet that described AP sends in Preset Time, is then signal emission mode by the second mode switching unit.
7. vehicle monitor terminal according to claim 6, is characterized in that, described vehicle monitor terminal also comprises:
Setting unit, for arranging described Preset Time according to the operational factor of current bullet train.
8. a ground communication node, is characterized in that, described ground communication node comprises:
Seek Signal reception end member, that launches for real-time reception vehicle monitor terminal SA seeks signal;
Seeking answer signal transmitting element, seeking answer signal for seeking signal described in basis to described SA transmission;
Three-mode converting unit, for described seek answer signal transmitting element send seek answer signal after, be signal emission mode by current working mode change;
Data transmission unit, the data for being stored this locality are sent to described SA;
Receive successful respond signal receiving unit, for receiving the reception successful respond signal of described SA for each Packet Generation;
Current working mode change when receiving successful respond signal for all not receiving when the packet of the predetermined number sent continuously, is then signal receiving modes by four-mode converting unit.
9. ground communication node according to claim 8, is characterized in that, described ground communication node also comprises:
Ground data receiving element, for receiving the data that ground controller is sent by total switch, described data send with broadcast mode or mode of unicast.
10. ground communication node according to claim 8 or claim 9, is characterized in that, the data that this locality stores are sent to described SA by described data transmission unit in a broadcast manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510213721.5A CN104852976B (en) | 2015-04-29 | 2015-04-29 | Answer method, vehicle monitor terminal and the ground communication node of land mobile communication system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510213721.5A CN104852976B (en) | 2015-04-29 | 2015-04-29 | Answer method, vehicle monitor terminal and the ground communication node of land mobile communication system |
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| Publication Number | Publication Date |
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| CN104852976A true CN104852976A (en) | 2015-08-19 |
| CN104852976B CN104852976B (en) | 2018-10-26 |
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| CN201510213721.5A Expired - Fee Related CN104852976B (en) | 2015-04-29 | 2015-04-29 | Answer method, vehicle monitor terminal and the ground communication node of land mobile communication system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114248820A (en) * | 2021-12-21 | 2022-03-29 | 卡斯柯信号有限公司 | Communication method of train control center and track circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1794689A (en) * | 2006-01-06 | 2006-06-28 | 北京交通大学 | Radio safety transmission method for signal data of locomotive |
| CN101353047A (en) * | 2008-08-07 | 2009-01-28 | 中兴智能交通系统（北京）有限公司 | Information transmission method, system and apparatus for train |
| CN102904695A (en) * | 2011-07-28 | 2013-01-30 | 国民技术股份有限公司 | Method and system for radio frequency link data transmission |
| JP2015082664A (en) * | 2013-10-21 | 2015-04-27 | 株式会社日立製作所 | Access point and communication method for access point |
-
2015
- 2015-04-29 CN CN201510213721.5A patent/CN104852976B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1794689A (en) * | 2006-01-06 | 2006-06-28 | 北京交通大学 | Radio safety transmission method for signal data of locomotive |
| CN101353047A (en) * | 2008-08-07 | 2009-01-28 | 中兴智能交通系统（北京）有限公司 | Information transmission method, system and apparatus for train |
| CN102904695A (en) * | 2011-07-28 | 2013-01-30 | 国民技术股份有限公司 | Method and system for radio frequency link data transmission |
| JP2015082664A (en) * | 2013-10-21 | 2015-04-27 | 株式会社日立製作所 | Access point and communication method for access point |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114248820A (en) * | 2021-12-21 | 2022-03-29 | 卡斯柯信号有限公司 | Communication method of train control center and track circuit |
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