CN105847082A - Method capable of protecting interurban railway GSM-R wireless message delay - Google Patents
Method capable of protecting interurban railway GSM-R wireless message delay Download PDFInfo
- Publication number
- CN105847082A CN105847082A CN201610159954.6A CN201610159954A CN105847082A CN 105847082 A CN105847082 A CN 105847082A CN 201610159954 A CN201610159954 A CN 201610159954A CN 105847082 A CN105847082 A CN 105847082A
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- China
- Prior art keywords
- time
- timestamp
- wireless information
- message
- delay
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0852—Delays
- H04L43/0864—Round trip delays
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
- H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Environmental & Geological Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention relates to a method capable of protecting the interurban railway GSM-R wireless message delay. According to the method, an effective confidence value of a timestamp Stamp is set for application data according to a GSM-R wireless message delay detection result relevant to a wireless communication air interface signal time domain. Compared with the prior art, the method provided by the invention has the advantages of ensuring the completeness and accuracy of the data, etc.
Description
Technical field
The present invention relates to a kind of railway signal system, especially relate to one can protect inter-city passenger rail GSM-R without
The method of line message delay.
Background technology
At present, in inter-city passenger rail system based on CTCS-2+ATO, trackside communication control server
The major function of (Communication and Control System, hereinafter referred to as CCS) equipment is to realize trackside
And the visual plant of the radio communication between vehicle-mounted, CCS receives shielding door trip door order from onboard system, real
The management of existing shield door switch gate order, the operation plan received from dispatching concentration management system is forwarded by CCS
To onboard system, with meet vehicle-mounted can be according to the demand of operation plan automatic Pilot.
Being connected by GSM-R wireless network between CCS equipment and mobile unit, data transmission uses TCP side
Formula, safe floor uses subset037 secure communication protocols, and application layer protocol uses the ferrum always unified < < CJTL_ formulated
The definition of car-ground radio message and application of principle > >.
Owing to the invalid message between CCS equipment and mobile unit is transmitted higher to the requirement of real-time of message, but
It is that GSM-R wireless network is likely to occur obstruction etc. and causes message delay, and at present because Subset-037 safety
The restriction of layer protocol self, it cannot protect the delay of message, and this is accomplished by designing a kind of method on the application layer and comes
The delay to wireless information has been assisted to protect.
According to the description of<<definition of CJTL_ car-ground radio message and application of principle>>, mobile unit is sent to CCS
All comprising a vehicle-mounted time calculator T_Train in the application layer messages of equipment, this time is that mobile unit sends
Current vehicle-mounted time counter during this message.Send out in t1, t2, t3, t4 moment respectively as it is shown in figure 1, vehicle-mounted
The message sent carries the T_Train of correspondence respectively.
CCS equipment the most all comprises a vehicle-mounted time calculator in the application layer messages replying mobile unit
T_Train, this T_Train are the up-to-date from mobile unit message of CCS equipment currently transmitted moment record
Vehicle-mounted time calculator value.Have received at T3 cycle CCS equipment as shown in Figure 1 and carry the message of t3, with
Time in the message reply to mobile unit, carry this T_Train (t3).
Now mobile unit receive CCS equipment this reply message time, due to the transmission delay of this message uncertain
And the T_Train carried in message cannot be utilized to judge whether this message postpones.Therefore need exist for introducing one side
Method carrys out the calculating of completion message transmission delay, thus realizes effectively protecting delay message.
Summary of the invention
Defect that the purpose of the present invention is contemplated to overcome above-mentioned prior art to exist and provide one can protect city
The method that border railway GSM-R wireless information postpones, vehicle-mounted message is increased by the method according to online time delay detection result
Increase the timestamp information of confidence, and have employed multiple repairing weld to eliminate error.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of method that can protect the delay of inter-city passenger rail GSM-R wireless information, it is characterised in that the method depends on
Eating dishes without rice or wine the relevant GSM-R wireless information time delay testing result of signal time domain according to radio communication, application data is carried out
The preset effective the value of the confidence of timestamp Stamp.
Described GSM-R wireless information time delay testing result is obtained by procedure below:
In conjunction with pass through different base station administration community time signal attenuation characteristic, sampled result is carried out weight process,
Thus calculate the actual delay time of vehicle-mounted message.
The method specifically includes following steps:
Step S1, each CCS equipment record the time of current CCS when sending the wireless information needing to confirm
Stabbing the Tsend (n) in timestamp list, the vehicle-mounted timestamp carried in record wireless information is Ttrain (n), note
Record the timestamp information of nearest M message；
Step S2, each CCS equipment, when receiving the confirmation message from mobile unit, confirm according to by it
Vehicle-mounted time Ttrain (n) CCS timestamp now be recorded correspondence timestamp list in
Treceive(n)；
Step S3, now based on timestamp list, the transmission delay of wireless information is calculated；
Step S4, hereafter every time CCS equipment sending any wireless information when, its vehicle-mounted time carried
It is set to record of currently transmitted moment up-to-date from the vehicle-mounted time in mobile unit message plus Ttrans；
Step S5, when mobile unit receives this wireless information, the timestamp carried in message is judged,
If this timestamp in the time range of regulation, does not then process according to the method for fault-safety principle.
Described M is 9.
Described based on timestamp list, the transmission delay of wireless information is calculated particularly as follows:
Step S31, calculate n-th group message in timestamp list from being sent to time of being confirmed
Tgap (n)=Treceive (n)-Tsend (n)；
The timestamp of nearest 9 message safeguarded in the stamp list of step S32, travel time, according to step S31
Method is calculated corresponding Tgap, obtains one group of Tgap (i), wherein i=1～9；
Step S33, employing Fibonacci sequence, carry out weight calculation process to calculated Tgap (i),
To final transmission delay Ttrans.
Compared with prior art, the invention have the advantages that
1, the present invention devises wireless information timestamp list, has carried out the time for each valid wireless message
The collection of stamp information, it is ensured that the comprehensive and accuracy of data；
2, the present invention devises the repeatedly calculation process to collection result, therefore improves the accuracy of operation result；
3, the present invention uses Fibonacci sequence to devise the weight processing method to repeatedly operation result, more contract
Close train actual motion time radio signal attenuation rule, therefore can with efficient balance train operation time cause wireless
Message transmission fluctuation；
4, whole scheme be all based on existing framework carry out on the application layer local revise, do not affect the compatibility of interface
Property.
Accompanying drawing explanation
Fig. 1 is the wireless message transmission sequential chart in background technology
Fig. 2 is that the present invention calculates wireless message transmission time delay flow chart；
Fig. 3 is the wireless message transmission sequential chart in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear,
It is fully described by, it is clear that described embodiment is a part of embodiment of the present invention rather than whole embodiment.
Based on the embodiment in the present invention, those of ordinary skill in the art are obtained on the premise of not making creative work
The every other embodiment obtained, all should belong to the scope of protection of the invention.
With reference to Fig. 1, illustrate the handling process of the inventive method, mainly comprise the steps that
Step 100, starts the task of the method, and creates timestamp list, completes to initialize；
Step 101, CCS is when sending the wireless information needing to confirm, it is judged that timestamp list can be used the most,
If it is not then exit calculation process, do not record the timestamp of this message；If it is available, then entrance step
102；
Step 102, timestamp list can be used, then record time stamp T send (i) when sending this wireless information；
Step 103, it may be judged whether receiving the confirmation message from mobile unit of correspondence, if do not received, continuing
Wait；If received, enter step 104；
Step 104, receives the onboard wireless message of confirmation, then records time stamp T receive (i) when receiving this message；
Step 105, the timestamp to each group of record, calculate corresponding transmission delay
Tgap (i)=Treceive (i)-send (i)；
Step 106, one group of 9 Tgap (i) that above-mentioned computing is obtained, carry out at weight according to Fibonacci arrangement
Reason, circular is as follows:
I. one group of Fibonacci number of permutations (1,1,2,3,5,8,13,21,34) is chosen；
Ii. this number of permutations is sued for peace, and carry out removing and processing by a numerical value in each arrangement, obtain a new combination
(1/80,1/80,2/80,3/80,5/80,8/80,13/80,21/80,34/80)；
Iii. utilize new arrangement obtained above, carry out weight calculation, obtain final time delay, calculate public affairs
Formula is:
Ttrans=Tgap (n-9) * (34/80)+Tgap (n-8) * 21/80+Tgap (n-7) * 13/80+Tgap (n-6) *
8/80+Tgap(n-5)*5/80+Tgap(n-4)*3/80+Tgap(n-3)*2/80+Tgap(n-2)*1/80+
Tgap(n-1)*1/80；
Mainly realize code as follows:
Step 107, CCS equipment is sending wireless information when, and its vehicle-mounted set of time carried is sent out for current
Send that the moment records up-to-date from the vehicle-mounted time in mobile unit message plus Ttrans；
The present invention is applied in inter-city passenger rail communication control server system, and this system is by ferrum total tissue
Expert's test, be included on the intercity circuit of tabernaemontanus bulrush favour expert's test of actual dynamically sport car, can be with many different factories
The vehicle-mounted of family carries out interface and communicates, it was demonstrated that be entirely capable of meeting field demand: effectively prevent GSM-R network to hinder
The dangerous consequences that plug or jitter cause.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art, in the technical scope that the invention discloses, can readily occur in various equivalence
Amendment or replacement, these amendment or replace all should contain within protection scope of the present invention.Therefore, the present invention
Protection domain should be as the criterion with scope of the claims.
Claims (5)
1. one kind can be protected the method that inter-city passenger rail GSM-R wireless information postpones, it is characterised in that the party
Method is eated dishes without rice or wine the relevant GSM-R wireless information time delay testing result of signal time domain according to radio communication, application data
Carry out the preset effective the value of the confidence of timestamp Stamp.
A kind of side that can protect the delay of inter-city passenger rail GSM-R wireless information the most according to claim 1
Method, it is characterised in that described GSM-R wireless information time delay testing result is obtained by procedure below:
In conjunction with pass through different base station administration community time signal attenuation characteristic, sampled result is carried out weight process,
Thus calculate the actual delay time of vehicle-mounted message.
A kind of side that can protect the delay of inter-city passenger rail GSM-R wireless information the most according to claim 1
Method, it is characterised in that the method specifically includes following steps:
Step S1, each CCS equipment record the time of current CCS when sending the wireless information needing to confirm
Stabbing the Tsend (n) in timestamp list, the vehicle-mounted timestamp carried in record wireless information is Ttrain (n), note
Record the timestamp information of nearest M message；
Step S2, each CCS equipment, when receiving the confirmation message from mobile unit, confirm according to by it
Vehicle-mounted time Ttrain (n) CCS timestamp now be recorded correspondence timestamp list in
Treceive(n)；
Step S3, now based on timestamp list, the transmission delay of wireless information is calculated；
Step S4, hereafter every time CCS equipment sending any wireless information when, its vehicle-mounted time carried
It is set to record of currently transmitted moment up-to-date from the vehicle-mounted time in mobile unit message plus Ttrans；
Step S5, when mobile unit receives this wireless information, the timestamp carried in message is judged,
If this timestamp in the time range of regulation, does not then process according to the method for fault-safety principle.
A kind of side that can protect the delay of inter-city passenger rail GSM-R wireless information the most according to claim 3
Method, it is characterised in that described M is 9.
A kind of side that can protect the delay of inter-city passenger rail GSM-R wireless information the most according to claim 4
Method, it is characterised in that described based on timestamp list, the transmission delay of wireless information is calculated particularly as follows:
Step S31, calculate n-th group message in timestamp list from being sent to time of being confirmed
Tgap (n)=Treceive (n)-Tsend (n)；
The timestamp of nearest 9 message safeguarded in the stamp list of step S32, travel time, according to step S31
Method is calculated corresponding Tgap, obtains one group of Tgap (i), wherein i=1～9；
Step S33, employing Fibonacci sequence, carry out weight calculation process to calculated Tgap (i),
To final transmission delay Ttrans.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610159954.6A CN105847082B (en) | 2016-03-21 | 2016-03-21 | A kind of method that inter-city passenger rail GSM-R wireless information can be protected to postpone |
Applications Claiming Priority (1)
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|---|---|---|---|
| CN201610159954.6A CN105847082B (en) | 2016-03-21 | 2016-03-21 | A kind of method that inter-city passenger rail GSM-R wireless information can be protected to postpone |
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| CN105847082A true CN105847082A (en) | 2016-08-10 |
| CN105847082B CN105847082B (en) | 2019-04-16 |
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| CN201610159954.6A Active CN105847082B (en) | 2016-03-21 | 2016-03-21 | A kind of method that inter-city passenger rail GSM-R wireless information can be protected to postpone |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109640354A (en) * | 2019-01-18 | 2019-04-16 | 卡斯柯信号有限公司 | A kind of detection method of car-ground radio message delay |
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| CN103332211A (en) * | 2013-05-21 | 2013-10-02 | 北京交通大学 | Improvement method of performance of train operation control system |
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2016
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Patent Citations (4)
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| EP2320403A2 (en) * | 2009-10-29 | 2011-05-11 | Siemens Corporation | Estimation of travel times using Bluetooth |
| CN102083007A (en) * | 2011-01-25 | 2011-06-01 | 上海交通大学 | GSM-R (Global System for Mobile Communications-Railway) cluster scheduling service analysis system and implementing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109640354A (en) * | 2019-01-18 | 2019-04-16 | 卡斯柯信号有限公司 | A kind of detection method of car-ground radio message delay |
| CN109640354B (en) * | 2019-01-18 | 2022-07-15 | 卡斯柯信号有限公司 | Method for detecting train-ground wireless message delay |
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| Publication number | Publication date |
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| CN105847082B (en) | 2019-04-16 |
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