CN105873123A - Detecting method of GSM-R wireless message delay of interurban railway - Google Patents
Detecting method of GSM-R wireless message delay of interurban railway Download PDFInfo
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- CN105873123A CN105873123A CN201610159952.7A CN201610159952A CN105873123A CN 105873123 A CN105873123 A CN 105873123A CN 201610159952 A CN201610159952 A CN 201610159952A CN 105873123 A CN105873123 A CN 105873123A
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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
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0658—Clock or time synchronisation among packet nodes
- H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
- H04W28/0236—Traffic management, e.g. flow control or congestion control based on communication conditions radio quality, e.g. interference, losses or delay
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention relates to a detecting method of GSM-R wireless message delay of an interurban railway. According to the method, practical delay time of a vehicle-mounted message is calculated by utilizing signal attenuation characteristics obtained when a train in runtime runs across zones governed by different base stations and adopting a Fibonacci sequence for weight processing of a sampling result. Compared with the prior art, the detecting method of the GSM-R wireless message delay of the interurban railway has the advantages of high accuracy of the operational result and the like.
Description
Technical field
The present invention relates to a kind of railway signal system, especially relate to a kind of inter-city passenger rail GSM-R wireless information and prolong
Slow detection method.
Background technology
In the inter-city passenger rail circuit of CTCS-2+ATO pattern, communication control server (Communication and
Control System, hereinafter referred to as CCS) major function be realize trackside and vehicle-mounted between radio communication
Visual plant, CCS receives shielding door trip door order from onboard system, it is achieved the pipe of shield door switch gate order
Reason, the operation plan received from dispatching concentration management system is transmitted to onboard system by CCS, vehicle-mounted to meet
Can be according to the demand of operation plan automatic Pilot.
Being connected by GSM-R wireless network between CCS with onboard system, data transmission uses TCP mode, peace
Holostrome uses subset037 secure communication protocols, and application layer protocol uses ferrum always unified < < the CJTL_ car ground formulated
Air message definition and application of principle > >.
Owing to relating to the security function of ground screen door and car door linkage, therefore CCS is to nothing based on GSM-R
The real-time of line message has certain requirement, and causes disappearing owing to GSM-R wireless network is likely to occur obstruction etc.
Breath postpones, and this is accomplished by CCS and can interpolate that out whether onboard wireless message postpones and carry out the message postponed
Protective treatment.But wireless information is not prolonged by secure layer protocols subset037 and application layer protocol itself at present
Protection late, this is accomplished by a kind of method of otherwise designed outside agreement and protects the wireless information postponed.
Summary of the invention
Defect that the purpose of the present invention is contemplated to overcome above-mentioned prior art to exist and provide a kind of operation result accurate
The detection method that the inter-city passenger rail GSM-R wireless information that really property is high postpones.
The purpose of the present invention can be achieved through the following technical solutions:
The detection method that a kind of inter-city passenger rail GSM-R wireless information postpones, it is characterised in that the method utilizes row
Car passes through the signal attenuation characteristics during community of different base station administration when running, and uses Fibonacci sequence, to adopting
Sample result carries out weight process, thus calculates the actual delay time of vehicle-mounted message.
The ingenious timestamp information that make use of in vehicle-mounted message of the method, and have employed multiple repairing weld to eliminate error.
The method specifically includes following steps:
1) when receiving effective onboard wireless message every time, record inside this onboard wireless message provide vehicle-mounted time
Between stab T_TRAIN (n), with receive order be as the criterion establishment wireless information timestamp list
2) time stamp T _ CCS (n) of CCS when receiving onboard wireless message, and corresponding step 1 are obtained)
T_TRAIN (n), also recorded wireless information timestamp list by T_CCS (n)；
3), when receiving new onboard wireless message, based on the wireless information timestamp list created, carry out every time
The computing of time delay；
4) step 3 is judged) obtain whether time delay exceeds the time delay of regulation, if beyond, according to event
The method of barrier failure to the safe side processes.
Described step 3) in time delay computing particularly as follows:
301), after the n-th cycle received effective vehicle-mounted message, the timestamp of the vehicle-mounted message being currently received is calculated
Difference △ TT (n-1) with the timestamp of the vehicle-mounted message in (n-1)th cycle；
302) when calculating the vehicle-mounted message being currently received, timestamp and (n-1)th cycle of CCS receive vehicle-mounted message
Time CCS the difference △ CT (n-1) of timestamp；
303) △ CT (n-1) and difference △ T (n-1)=△ CT (the n-1)-△ TT (n-1) of △ TT (n-1) is calculated；
304) M the wireless information temporal information being most recently received safeguarded in traversal wireless information timestamp list,
According to step 301,302,303 calculate corresponding △ T respectively, obtain one group of △ Ti (i=n-1, n-2 ... n-M)；
305) use Fibonacci sequence, calculated △ Ti is carried out weight calculation process, obtains final
Message delay times △ Tdelay.
Preferably, described M is 9.
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.
Accompanying drawing explanation
Fig. 1 is the particular flow sheet of the present invention；
Fig. 2 is △ Ti computing schematic diagram 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.
As it is shown in figure 1, describe the handling process of this method.Mainly comprise the steps that
Step 1, starts the task of the method, and creates timestamp list, completes to initialize；
Step 2, to the message being newly received, it is judged that timestamp list can be used the most, if it is not then right
This message does not judge whether it postpones (at above-mentioned n < when 9, owing to the temporal information gathered is the most insufficient, no
Whether postpone to make a decision to wireless information, it is believed that this message is effective)；If it is available, then enter step 3.
Step 3, timestamp list can be used, then sequentially take out wireless information timestamp information from timestamp list
(T_Train (i), T_CCS (i)), row operation of going forward side by side obtains one group (△ TT (i), △ CT (i)), according to △ T (i)=△
CT (i)-△ TT (i) is calculated △ T (i), and computing schematic diagram is as in figure 2 it is shown, mainly to realize code as follows:
Step 4, searching loop timestamp list, it is judged that it is complete whether the timestamp information of all records travels through, if
It is yes, then enters step 5, if it has not, continue executing with step 3；
Step 5, a group 9 (△ TT (i), △ CT (i)) that above-mentioned computing is obtained, arrange according to Fibonacci
Carry out weight process, be calculated final time delay；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:
△ Tdelay=△ T (n-1) * (34/80)+△ T (n-2) * 21/80+ △ T (n-3) * 13/80+ △
T(n-4)*8/80+△T(n-5)*5/80+△T(n-6)*3/80+△T(n-7)*2/80+△T(n-8)*1/80
+△T(n-9)*1/80；
Mainly realize code as follows:
Step 6, according to carrying out judgement process the time delay calculated: if the time delay calculated is more than permission
Threshold value, then it is assumed that this wireless information is invalid, and terminate the process to this message.Otherwise, then it is assumed that this message is effective,
The timestamp information (T_Train, T_CCS) of this message be recorded in timestamp list.
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, and proves to be entirely capable of meeting field demand: effectively prevent GSM-R network to block
Or the dangerous consequences that jitter causes.
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. the detection method that an inter-city passenger rail GSM-R wireless information postpones, it is characterised in that the method profit
Pass through the signal attenuation characteristics during community of different base station administration during with train operation, and use Fibonacci sequence,
Sampled result is carried out weight process, thus calculates the actual delay time of vehicle-mounted message.
The detection method that a kind of inter-city passenger rail GSM-R wireless information the most according to claim 1 postpones,
It is characterized in that, the ingenious timestamp information that make use of in vehicle-mounted message of the method, and have employed multiple repairing weld to disappear
Except error.
The detection method that a kind of inter-city passenger rail GSM-R wireless information the most according to claim 1 postpones,
It is characterized in that, the method specifically includes following steps:
1) when receiving effective onboard wireless message every time, record inside this onboard wireless message provide vehicle-mounted time
Between stab T_TRAIN (n), with receive order be as the criterion establishment wireless information timestamp list
2) time stamp T _ CCS (n) of CCS when receiving onboard wireless message, and corresponding step 1 are obtained)
T_TRAIN (n), also recorded wireless information timestamp list by T_CCS (n)；
3), when receiving new onboard wireless message, based on the wireless information timestamp list created, carry out every time
The computing of time delay；
4) step 3 is judged) obtain whether time delay exceeds the time delay of regulation, if beyond, according to event
The method of barrier failure to the safe side processes.
The detection method that a kind of inter-city passenger rail GSM-R wireless information the most according to claim 3 postpones,
It is characterized in that, described step 3) in time delay computing particularly as follows:
301), after the n-th cycle received effective vehicle-mounted message, the timestamp of the vehicle-mounted message being currently received is calculated
Difference △ TT (n-1) with the timestamp of the vehicle-mounted message in (n-1)th cycle；
302) when calculating the vehicle-mounted message being currently received, timestamp and (n-1)th cycle of CCS receive vehicle-mounted message
Time CCS the difference △ CT (n-1) of timestamp；
303) △ CT (n-1) and difference △ T (n-1)=△ CT (the n-1)-△ TT (n-1) of △ TT (n-1) is calculated；
304) M the wireless information temporal information being most recently received safeguarded in traversal wireless information timestamp list,
According to step 301,302,303 calculate corresponding △ T respectively, obtain one group of △ Ti (i=n-1, n-2 ... n-M)；
305) use Fibonacci sequence, calculated △ Ti is carried out weight calculation process, obtains final
Message delay times △ Tdelay.
The detection method that a kind of inter-city passenger rail GSM-R wireless information the most according to claim 4 postpones,
It is characterized in that, described M is 9.
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| CN201610159952.7A CN105873123B (en) | 2016-03-21 | 2016-03-21 | A kind of detection method of inter-city passenger rail GSM-R wireless information delay |
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| CN201610159952.7A CN105873123B (en) | 2016-03-21 | 2016-03-21 | A kind of detection method of inter-city passenger rail GSM-R wireless information delay |
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Cited By (4)
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| CN106959899A (en) * | 2017-02-27 | 2017-07-18 | 阿里巴巴集团控股有限公司 | A kind of message blocking detection method, device and computer-readable storage medium |
| CN109017880A (en) * | 2018-06-28 | 2018-12-18 | 武汉钢铁有限公司 | A kind of rail vehicle management system |
| 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 |
| CN109922459A (en) * | 2019-01-18 | 2019-06-21 | 卡斯柯信号有限公司 | A kind of control method synchronizing cycle that can improve more vehicle communication efficiencies |
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Cited By (6)
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| 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 |
| CN109922459A (en) * | 2019-01-18 | 2019-06-21 | 卡斯柯信号有限公司 | A kind of control method synchronizing cycle that can improve more vehicle communication efficiencies |
| 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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