CN109640354A - A kind of detection method of car-ground radio message delay - Google Patents
A kind of detection method of car-ground radio message delay Download PDFInfo
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- CN109640354A CN109640354A CN201910049024.9A CN201910049024A CN109640354A CN 109640354 A CN109640354 A CN 109640354A CN 201910049024 A CN201910049024 A CN 201910049024A CN 109640354 A CN109640354 A CN 109640354A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/364—Delay profiles
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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
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Abstract
The present invention relates to a kind of detection methods of car-ground radio message delay, train running speed is introduced into and is calculated in the factor, it include: when 1) receiving effective car-ground radio message every time, the vehicle provided inside message with recording the vehicle ground timestamp and train speed, are subject to and receive sequence creation wireless information timestamp list and train running speed list；2) timestamp of CTCS when receiving car-ground radio message is obtained；3) when receiving new car-ground radio message every time, the operation of delay time carried out based on the list of wireless information timestamp and train running speed list created, obtains final message delay times parameter △ Tdelay；4) judge whether △ Tdelay exceeds the delay time parameter threshold value of setting, swing to safe method according to failure if exceeding and handled.Compared with prior art, the present invention is introduced into train running speed and calculates in the factor, when can detecte train running speed and being more than 200km/h or more, the advantages that whether car-ground radio message postpones.
Description
Technical field
The present invention relates to railway signal systems, disappear more particularly, to a kind of car-ground radio for inter-city passenger rail train control system
Cease the detection method of delay.
Background technique
Chinese Patent Application No. CN201610159952.7 discloses one kind and is able to detect inter-city passenger rail GSM-R wireless information
The method of delay, this method are applied in the inter-city passenger rail route of CTCS-2+ATO mode, communication control server
Between the major function of (Communication and Control System, hereinafter referred to as CCS) is realization trackside and is vehicle-mounted
Wireless communication important equipment, CCS receives shielding door switch door order from onboard system, realizes shield door switch gate order
Management, the operation plan received from dispatching concentration management system is transmitted to onboard system by CCS, with meet it is vehicle-mounted can be according to
The demand of operation plan automatic Pilot.By GSM-R wireless network connection between CCS and onboard system, and CCS is to based on GSM-R
The real-time of wireless information have certain requirement.Therefore this method mainly judges whether onboard wireless message postpones and to prolonging
Slow message carries out protective treatment.
But the above method can be only applied in the inter-city passenger rail route of CTCS-2+ATO mode, simultaneously for train operation
When speed is relatively high, the problems such as detection accuracy can not just be ensured.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of car-ground radio message
The detection method of delay,.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of detection method of car-ground radio message delay, this method are introduced into train running speed and calculate in the factor,
The method the following steps are included:
1) when receiving effective car-ground radio message every time, the vehicle that provides inside message with recording the vehicle time stamp T _
TRAIN (n) and train running speed L_train_speed (n), be subject to receive sequence creation wireless information timestamp list and
Train running speed list；
2) T_TRAIN (n) in 1) is corresponded to, time stamp T _ CTCS (n) of CTCS when receiving car-ground radio message is obtained, and
T_CTCS (n), is also recorded wireless information timestamp list by corresponding T_TRAIN (n)；Correspond to the L_train_speed in 1)
(n), L_train_speed (n) is recorded in train running speed list；
3) it when receiving new car-ground radio message every time, to be transported based on the wireless information timestamp list created and train
Scanning frequency degree time list, carries out the operation of delay time, obtains final message delay times parameter △ Tdelay；
4) judge whether △ Tdelay exceeds the delay time parameter threshold value of setting, swing to peace according to failure if exceeding
Full method is handled.
Preferably, the n in the T_TRAIN (n) is the main execution cycle number of current CTCS.
Preferably, the time for 9 wireless informations being most recently received at most is safeguarded in the wireless information timestamp list
Information；The train running information for 9 wireless informations being most recently received at most is safeguarded in the train running speed list.
Preferably, detailed process is as follows for the operation of the delay time:
I. n-th of period with receiving effective vehicle after message, with calculating the vehicle the being currently received timestamp of message and (n-1)th
The vehicle in a period the timestamp of message difference △ TT (n-1)；
Ii. with calculating the vehicle being currently received when message the timestamp of CTCS and (n-1)th period with receiving vehicle message when
The difference △ CT (n-1) of the timestamp of CTCS；
Iii. difference △ T (n-1)=△ CT (n-1)-△ TT (n-1) of △ CT (n-1) and △ TT (n-1) are calculated；
Iv. 9 be most recently received the wireless information temporal information safeguarded in the list of wireless information timestamp is traversed, according to step
Rapid i, ii, iii calculate separately corresponding △ T, obtain one group of △ Ti (i=n-1, n-2 ... n-9)；
V. Fibonacci sequence is used, to each vehicle in the △ Ti being calculated and the train running speed list created
The train speed L_train_speed (n) of message carries out weight calculation process, obtains final message delay times parameter △
Tdelay。
When preferably, by calculating train running speed 400km/h, Doppler frequency shift is ± 333.3HZ, in LTE-R net
In network, train can support 400km/h train running speed, therefore handle by existing Doppler Compensation Method, train highest
Threshold value of the 400km/h as train running speed.
Preferably, this method is suitable for detecting GSM-R system while being applicable in following LTE-R system car-ground radio message
Delay detection.
Compared with prior art, the invention has the following advantages that
1, this method is applicable not only to detection GSM-R system while being applicable in following LTE-R system car-ground radio message
Delay detection.
2, it only accounts for detecting car-ground radio in the inter-city passenger rail route that train running speed is 200km/h in original method
The method of message delay.This method is introduced into train running speed and calculates in the factor, and can detecte train running speed is more than
When 200km/h or more, whether car-ground radio message postpones.
3, the speed of service of train is higher, and the Doppler frequency shift as caused by train running speed is bigger.When the operation of train
When speed is 400km/h, pass through Doppler frequency shift calculation formula:
Doppler frequency shift can be calculated: ± 333.3Hz, serious with the influencing vehicle nothing of train running speed at this time
The time delay of line message, by compensating to Doppler frequency shift, the speed of service highest of train can be supported as 400km/h speed,
This method selects 400km/h as train operation maximum speed.
Detailed description of the invention
Fig. 1 is work flow diagram of the invention；
Fig. 2 is operation schematic diagram of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is a part of the embodiments of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, those of ordinary skill in the art's every other reality obtained without making creative work
Example is applied, all should belong to the scope of protection of the invention.
The present invention improves a kind of method for being able to detect the delay of inter-city passenger rail GSM-R wireless information: the present invention
It is not only applicable in the inter-city passenger rail route of CTCS-2+ATO mode, it is suitable for CTCS-3 and CTCS-4, Yi Jiwei
To transmit the train operation control system of information based entirely on wireless communication (LTE-R)；The present invention is in former methodical middle introducing
When the train speed factor is to support higher train running speed, whether car-ground radio message postpone；The present invention is considered to more
In the case that general Le frequency displacement deviation compensates, train can support operation highest running speed.
Schematic diagram 1 describes the process flow of this method.It mainly comprises the steps that
Step 1, start the task of this method, and creation time stabs list, complete initialization；
Step 2, to the message newly received, judge whether timestamp list can be used, if it is not then to the message
Do not judge whether it postpones (in above-mentioned n < 9, since the temporal information of acquisition is still insufficient, whether not prolong wireless information
It makes a decision late, it is believed that the message is effective)；If it is available, then entering step 3.
Step 3, timestamp list is available, then sequence takes out wireless information timestamp information (T_ from timestamp list
Train (i), T_CTCS (i)), and carry out operation and obtain one group (△ TT (i), △ CT (i)), according to △ T (i)=△ CT (i)-
△ T (i) is calculated in △ TT (i), and operation schematic diagram is as shown in Fig. 2, mainly realize that code is as follows:
Step 4, timestamp list is looped through, judges whether the timestamp information of all records traverses and finishes, if it is,
5 are then entered step, if it has not, continuing to execute step 3；
Step 5, disappear to vehicle in one group 9 (△ TT (i), △ CT (i)) obtaining to above-mentioned operation and timestamp list
Corresponding train speed is ceased, is arranged according to Fibonacci and carries out weight processing, final delay time is calculated；It is specific to calculate
Method is as follows:
I. one group of Fibonacci number of permutations (1,1,2,3,5,8,13,21,34) is chosen；
Ii. it sums to the number of permutations, and numerical value in each arrangement is removed and handled, obtain a new combination (1/
80,1/80,2/80,3/80,5/80,8/80,13/80,21/80,34/80)；
Iii. new arrangement obtained above is utilized, weight calculation is carried out, obtains final delay time, calculation formula
Are as follows:
△ Tdelay=△ T (n-1) * (34/80) * l_train_speed (n-1)+△ T (n-2) * 21/80*l_train_
speed(n-2)+△T(n-3)*13/80*l_train_speed(n-3)+△T(n-4)*8/80*l_train_speed(n-4)
+△T(n-5)*5/80*l_train_speed(n-5)+△T(n-6)*3/80*l_train_speed(n-6)+△T(n-7)*
2/80*l_train_speed(n-7)+△T(n-8)*1/80*l_train_speed(n-8)+△T(n-9)*1/80*l_
train_speed(n-9)；
It is main to realize that code is as follows:
Step 6, judgement processing is carried out according to the delay time of calculating: if the delay time calculated is greater than the threshold allowed
Value, then it is assumed that the wireless information is invalid, and terminates the processing to the message.Otherwise, then it is assumed that the message is effective, by the message
Timestamp information (T_Train, T_CTCS) is recorded in timestamp list.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (6)
1. a kind of detection method of car-ground radio message delay, which is characterized in that train running speed is introduced into meter by this method
Calculate the factor in, the method the following steps are included:
1) when receiving effective car-ground radio message every time, the vehicle that provides inside message with recording vehicle ground time stamp T _ TRAIN
(n) it with train running speed L_train_speed (n), is subject to and receives sequence creation wireless information timestamp list and train
Speed of service list；
2) T_TRAIN (n) in 1) is corresponded to, obtains time stamp T _ CTCS (n) of CTCS when receiving car-ground radio message, and corresponding
Wireless information timestamp list is also recorded in T_CTCS (n) by T_TRAIN (n)；The L_train_speed (n) in 1) is corresponded to,
L_train_speed (n) is recorded in train running speed list；
It 3), be based on the wireless information timestamp list created and train operation speed when receiving new car-ground radio message every time
Time list is spent, the operation of delay time is carried out, obtains final message delay times parameter △ Tdelay；
4) judge whether △ Tdelay exceeds the delay time parameter threshold value of setting, it is safe if swung to beyond if according to failure
Method is handled.
2. a kind of detection method of car-ground radio message delay according to claim 1, which is characterized in that the T_
The main execution cycle number that n in TRAIN (n) is current CTCS.
3. a kind of detection method of car-ground radio message delay according to claim 1, which is characterized in that described is wireless
The temporal information for 9 wireless informations being most recently received at most is safeguarded in message time stamp list；The train running speed column
The train running information for 9 wireless informations being most recently received at most is safeguarded in table.
4. a kind of detection method of car-ground radio message delay according to claim 1, which is characterized in that the delay
Detailed process is as follows for the operation of time:
I. n-th of period with receiving effective vehicle after message, with calculating the vehicle the being currently received timestamp of message and the (n-1)th week
The vehicle of phase the timestamp of message difference △ TT (n-1)；
Ii. with calculating the vehicle being currently received when message the timestamp of CTCS and (n-1)th period with receiving vehicle message when CTCS
The difference △ CT (n-1) of timestamp；
Iii. difference △ T (n-1)=△ CT (n-1)-△ TT (n-1) of △ CT (n-1) and △ TT (n-1) are calculated；
Iv. 9 be most recently received the wireless information temporal information safeguarded in the list of wireless information timestamp is traversed, according to step i,
Ii, iii calculate separately corresponding △ T, obtain one group of △ Ti (i=n-1, n-2 ... n-9)；
V. Fibonacci sequence is used, to each vehicle in the △ Ti being calculated and the train running speed list created message
Train speed L_train_speed (n) carry out weight calculation process, obtain final message delay times parameter △
Tdelay。
5. a kind of detection method of car-ground radio message delay according to claim 1, which is characterized in that arranged by calculating
When vehicle speed of service 400km/h, Doppler frequency shift is ± 333.3HZ, and in LTE-R network, train passes through existing Doppler
Compensation method, train highest can support 400km/h train running speed, therefore using 400km/h as the threshold of train running speed
Value.
6. a kind of detection method of car-ground radio message delay according to claim 1, which is characterized in that this method is applicable in
It is applicable in the delay detection of following LTE-R system car-ground radio message simultaneously in detection GSM-R system.
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| US20110230197A1 (en) * | 2010-03-22 | 2011-09-22 | Shiquan Wu | System and apparatus for high speed train communication |
| CN105847082A (en) * | 2016-03-21 | 2016-08-10 | 卡斯柯信号有限公司 | Method capable of protecting interurban railway GSM-R wireless message delay |
| CN105873123A (en) * | 2016-03-21 | 2016-08-17 | 卡斯柯信号有限公司 | Detecting method of GSM-R wireless message delay of interurban railway |
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2019
- 2019-01-18 CN CN201910049024.9A patent/CN109640354B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110230197A1 (en) * | 2010-03-22 | 2011-09-22 | Shiquan Wu | System and apparatus for high speed train communication |
| CN105847082A (en) * | 2016-03-21 | 2016-08-10 | 卡斯柯信号有限公司 | Method capable of protecting interurban railway GSM-R wireless message delay |
| CN105873123A (en) * | 2016-03-21 | 2016-08-17 | 卡斯柯信号有限公司 | Detecting method of GSM-R wireless message delay of interurban railway |
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| Title |
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| 刘宏杰等: "CBTC列车安全定位中通信延时的研究", 《市政技术》 * |
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