CN105873123B - A kind of detection method of inter-city passenger rail GSM-R wireless information delay - Google Patents
A kind of detection method of inter-city passenger rail GSM-R wireless information delay Download PDFInfo
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- CN105873123B CN105873123B CN201610159952.7A CN201610159952A CN105873123B CN 105873123 B CN105873123 B CN 105873123B CN 201610159952 A CN201610159952 A CN 201610159952A CN 105873123 B CN105873123 B CN 105873123B
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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)
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The present invention relates to a kind of detection methods of inter-city passenger rail GSM-R wireless information delay, the signal attenuation characteristics when cell of different base station administration are passed through when this method is using train operation, and use Fibonacci sequence, weight processing is carried out to sampled result, to calculate the actual delay time of vehicle-mounted message.Compared with prior art, the present invention has many advantages, such as that operation result accuracy is high.
Description
Technical field
The present invention relates to a kind of railway signal systems, more particularly, to a kind of delay of inter-city passenger rail GSM-R wireless information
Detection method.
Background technique
In the inter-city passenger rail route of CTCS-2+ATO mode, communication control server (Communication and
Control System, hereinafter referred to as CCS) major function be realize trackside and it is vehicle-mounted between the important of wireless communication set
Standby, CCS receives shielding door switch door order from onboard system, realizes the management of shield door switch gate order, and CCS will collect from scheduling
The operation plan that middle management system receives is transmitted to onboard system, with meet it is vehicle-mounted can be according to operation plan automatic Pilot
Demand.
By GSM-R wireless network connection between CCS and onboard system, data transmission uses TCP mode, and safe floor uses
Subset037 secure communication protocols, application layer protocol using iron always unify formulate < < CJTL_ car-ground radio message definition and answer
With principle > >.
Due to being related to the security function of ground screen door and car door linkage, CCS is to the wireless information based on GSM-R
Real-time has certain requirement, and leads to message delay since GSM-R wireless network is likely to occur obstruction etc., this is just needed
CCS can judge whether onboard wireless message postpones and carry out protective treatment to the message of delay.But current safe floor association
View subset037 and application layer protocol itself do not carry out delay protection to wireless information, this is just needed except agreement separately
A kind of method is designed to protect the wireless information of delay.
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 operation result is accurate
Property high inter-city passenger rail GSM-R wireless information delay detection method.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of detection method of inter-city passenger rail GSM-R wireless information delay, which is characterized in that this method utilizes train operation
When pass through different base station administration cell when signal attenuation characteristics, and use Fibonacci sequence, sampled result is weighed
It handles again, to calculate the actual delay time of vehicle-mounted message.
The ingenious timestamp information being utilized in vehicle-mounted message of this method, and multiple repairing weld is used to eliminate error.
This method specifically includes the following steps:
1) when receiving effective onboard wireless message every time, the vehicle-mounted timestamp provided inside the onboard wireless message is recorded
T_TRAIN (n) is subject to and receives sequence creation wireless information timestamp list
2) time stamp T _ CCS (n) of CCS when receiving onboard wireless message, and the T_TRAIN (n) of corresponding step 1) are obtained,
T_CCS (n) is also recorded to wireless information timestamp list；
3) when receiving new onboard wireless message every time, based on the wireless information timestamp list created, postponed
The operation of time；
4) judgment step 3) obtain whether delay time exceeds defined delay time, it is oriented to if exceeding according to failure
The method of safety is handled.
The operation of delay time in the step 3) specifically:
301) after n-th of period receive effective vehicle-mounted message, the timestamp and for the vehicle-mounted message being currently received is calculated
The difference △ TT (n-1) of the timestamp of the vehicle-mounted message in n-1 period；
302) the CCS when timestamp of CCS and (n-1)th period receive vehicle-mounted message when calculating the vehicle-mounted message being currently received
Timestamp difference △ CT (n-1)；
303) difference △ T (n-1)=△ CT (n-1)-△ TT (n-1) of △ CT (n-1) and △ TT (n-1) are calculated；
304) the M wireless information temporal information being most recently received safeguarded in the list of wireless information timestamp is traversed, according to
Step 301,302,303 calculate separately corresponding △ T, obtain one group of △ Ti (i=n-1, n-2 ... n-M)；
305) Fibonacci sequence is used, weight calculation process is carried out to the △ Ti being calculated, obtains final message
Delay time △ Tdelay.
Preferably, the M is 9.
Compared with prior art, the invention has the following advantages that
1, the present invention devises wireless information timestamp list, has carried out timestamp letter for each valid wireless message
The acquisition of breath, it is ensured that the comprehensive and accuracy of data；
2, the present invention devises the multiple calculation process to collection result, therefore improves the accuracy of operation result；
3, the present invention devises the weight processing method to multiple operation result using Fibonacci sequence, more agrees with column
Radio signal attenuation rule when vehicle actual motion, thus can be with efficient balance train operation when caused wireless message transmission wave
It is dynamic.
Detailed description of the invention
Fig. 1 is specific flow chart of the invention；
Fig. 2 is △ Ti operation schematic diagram of the present 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.
As shown in Figure 1, describing 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_CCS (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, one group 9 (△ TT (i), the △ CT (i)) obtained to above-mentioned operation is weighed according to Fibonacci arrangement
It handles again, final delay time is calculated；Circular 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)+△ 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；
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_CCS) is recorded in timestamp list.
The present invention is applied in inter-city passenger rail communication control server system, which has passed through iron total tissue
Expert's test, expert including dynamic sport car practical on the intercity route of tabernaemontanus bulrush favour test, can be with the vehicle-mounted of more different manufacturers
Interface and communication are carried out, proves to be able to satisfy field demand completely: GSM-R network obstruction or jitter effectively being prevented to cause
Dangerous consequences.
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 (3)
1. a kind of detection method of inter-city passenger rail GSM-R wireless information delay, which is characterized in that when this method utilizes train operation
The signal attenuation characteristics when cell of different base station administration are passed through, and use Fibonacci sequence, weight is carried out to sampled result
Processing, to calculate the actual delay time of vehicle-mounted message；
This method specifically includes the following steps:
1) when receiving effective onboard wireless message every time, record the vehicle-mounted time stamp T that is provided inside onboard wireless message _
TRAIN (n) is subject to and receives sequence creation wireless information timestamp list
2) time stamp T _ CCS (n) of CCS when receiving onboard wireless message, and the T_TRAIN (n) of corresponding step 1) are obtained, by T_
Wireless information timestamp list is also recorded in CCS (n)；
3) when receiving new onboard wireless message every time, based on the wireless information timestamp list created, delay time is carried out
Operation；
4) judgment step 3) obtain whether delay time exceeds defined delay time, according to fault-safety principle if exceeding
Method handled；
The operation of delay time in the step 3) specifically:
301) after n-th of period receive effective vehicle-mounted message, calculate the vehicle-mounted message being currently received timestamp and (n-1)th
The difference △ TT (n-1) of the timestamp of the vehicle-mounted message in period；
302) when calculating the vehicle-mounted message being currently received the timestamp of CCS and (n-1)th period when receiving vehicle-mounted message CCS when
Between the difference △ CT (n-1) that stabs；
303) difference △ T (n-1)=△ CT (n-1)-△ TT (n-1) of △ CT (n-1) and △ TT (n-1) are calculated；
304) the M wireless information temporal information being most recently received safeguarded in the list of wireless information timestamp is traversed, according to step
301,302,303 calculate separately corresponding △ T, obtain one group of △ Ti (i=n-1, n-2 ... n-M)；
305) Fibonacci sequence is used, weight calculation process is carried out to the △ Ti being calculated, obtains final message delay
Time △ Tdelay, circular are 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)+△ 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。
2. a kind of detection method of inter-city passenger rail GSM-R wireless information delay according to claim 1, which is characterized in that
The ingenious timestamp information being utilized in vehicle-mounted message of this method, and multiple repairing weld is used to eliminate error.
3. a kind of detection method of inter-city passenger rail GSM-R wireless information delay according to claim 1, which is characterized in that
The M is 9.
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106959899B (en) * | 2017-02-27 | 2021-01-01 | 创新先进技术有限公司 | Message blocking detection method, device and computer 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 |
| CN109922459B (en) * | 2019-01-18 | 2021-09-28 | 卡斯柯信号有限公司 | Synchronous period control method capable of improving multi-vehicle communication efficiency |
| 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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