CN106781483A - Intelligent traffic management systems - Google Patents
Intelligent traffic management systems Download PDFInfo
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- CN106781483A CN106781483A CN201611234349.7A CN201611234349A CN106781483A CN 106781483 A CN106781483 A CN 106781483A CN 201611234349 A CN201611234349 A CN 201611234349A CN 106781483 A CN106781483 A CN 106781483A
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0108—Measuring and analyzing of parameters relative to traffic conditions based on the source of data
- G08G1/0112—Measuring and analyzing of parameters relative to traffic conditions based on the source of data from the vehicle, e.g. floating car data [FCD]
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0125—Traffic data processing
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0125—Traffic data processing
- G08G1/0133—Traffic data processing for classifying traffic situation
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0137—Measuring and analyzing of parameters relative to traffic conditions for specific applications
- G08G1/0141—Measuring and analyzing of parameters relative to traffic conditions for specific applications for traffic information dissemination
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
Abstract
The present invention relates to traffic management technology field, specifically a kind of Intelligent traffic management systems for being particularly well-suited to urban traffic road management, it is characterized in that being provided with monitor supervision platform and more than two user terminals, monitor supervision platform completes data communication with user terminal through radio communication circuit, the monitor supervision platform includes data reception module, data distributing module, data analysis module, database, road condition discrimination module is provided with the data analysis module, the road condition discrimination module includes the automatic division module of road subsection, road traffic parameter real-time reception module, road traffic state real-time identification module and identification result output module, the present invention is compared with prior art, it is low with communications cost, transmission is reliable, the significant advantage such as road traffic blocking can be alleviated.
Description
Technical field：
It is specifically a kind of to be particularly well-suited to what urban traffic road managed the present invention relates to traffic management technology field
Intelligent traffic management systems.
Background technology：
At present, motor vehicle has been the indispensable vehicles in people's daily life, the type and quantity of motor vehicle
Quickly increasing, therefore, in order to ensure the normal pass of motor vehicle, it is necessary to be united to the travel conditions of motor vehicle in road
Meter, so as to reach the purpose of traffic administration.
When traffic administration is carried out, detection the current of motor vehicle is most basic link.At present, main detection mode bag
Include：The modes such as loop coil, ultrasonic wave, microwave, video.Wherein, although the detection mode energy such as loop coil, ultrasonic wave, microwave
Enough detection vehicle is crossed and can interpolate that the speed and substantially travel direction of vehicle, but cannot carry out area to different vehicle
Point, it is impossible to enough trackings completed for designated vehicle；The mode of video detection is (for example, pass through video camera or infrared camera
Shot) although the information such as mark (for example, car plate), profile, specification, the color of vehicle can be shown, and can be by
The modes such as loop coil, ultrasonic wave, microwave determine the travel speed of vehicle, but the data traffic transmitted during video detection is very
Greatly, the car amount number and on urban road is a lot, if necessary to follow the trail of designated vehicle, then needs to extract every from video pictures
Individual vehicles identifications are simultaneously identified and contrast, therefore cannot almost realize the tracking to designated vehicle.
Additionally, in above-mentioned vehicle checking method, if detected using loop coil, it is necessary to which the road surface to road carries out weight
New finishing needs to be respectively provided with each track coil (it is estimated that being detected for nearly 100 crossings so as to set coil
Need to set nearly thousand coils, and need the excavation that road pavement carries out tens thousand of meters) its workload and cost it is all very big, and can shadow
The normal of road is rung to use；If using video detection mode, it usually needs surveyed by infrared ray or ultrasonic wave, microwave
Speed, not only cost input is high, and the complexity of testing equipment is higher, it is necessary to safeguarded to equipment, labor intensive and material resources.
Data communication system is one of important component of urban traffic control system, and it is by data acquisition, transmission
And administrative skill, Surveillance center is obtained the magnitude of traffic flow at each crossing of road network and the operation shape of traffic signaling equipment exactly
State, so as to ensure that the control effect of road network creates conditions.Therefore, how quickly, accurately and real-time by each crossing
Traffic flow data and traffic signaling equipment running status are uploaded to Surveillance center and by passing control instruction under Surveillance center to signal
Machine is just into the important step of whole control system Effec-tive Function.The existing urban traffic control system network of current China is main
Row data communication is entered using wired modes such as phone or private cables, intelligent transportation system ITS and various intelligence can not have been met
Real-time and the mobility requirement of vehicle mobile terminals data communication.
General packet radio service gprses (GeneralPacketRadioService) are used as a kind of high speed, efficient, economy
Wireless system, with network coverage it is wide, access it is rapid, charge by flow, it is real-time online, unexcellent without any wiring
Point, is particularly well-suited to being interrupted, paroxysmal or frequently, a small amount of data transfer, also is adapted for burst big data quantity in short-term
Communication, fully meets the bidirectional data communication of real-time distributed urban transportation, the data acquisition of multiple spot traffic signaling equipment and monitoring
Demand.
The content of the invention：
The present invention is for shortcoming and defect present in prior art, it is proposed that one kind is particularly well-suited to urban traffic road
The Intelligent traffic management systems of management.
The present invention can be reached by following measures：
A kind of Intelligent traffic management systems, it is characterised in that be provided with monitor supervision platform and more than two user terminals, prison
Control platform completes data communication with user terminal through radio communication circuit, and the monitor supervision platform includes data reception module, data
Module, data analysis module, database are issued, road condition discrimination module, the road are provided with the data analysis module
Condition discrimination module includes the automatic division module of road subsection, road traffic parameter real-time reception module, road traffic state reality
When recognize module and identification result output module, the user terminal be provided with local controller, camera, memory, power supply,
Telecommunication circuit, display circuit, touch screen, voice warning circuit, serial/parallel conversion module, d GPS locating module, wherein local control
Device is fixed with camera, memory, power supply, telecommunication circuit, display circuit, voice warning circuit, serial/parallel conversion module, GPS respectively
Position module is connected, and display circuit is connected with touch screen.
User terminal is connected with monitor supervision platform by ethernet communication circuit in the present invention, be provided with the user terminal with
The network congestion detection module and data communication that local controller is connected are switched fast module, wherein network congestion detection module
Including transmission delay rate of change acquisition module, a reference value adjusting module, judge whether that resetting a reference value module, a reference value resets mould
Block, jitter value computing module, wherein transmission delay rate of change acquisition module, a reference value adjusting module, judge whether reset benchmark
Value module is sequentially connected, and judges whether that the output end for resetting a reference value module resets module with a reference value respectively and jitter value is calculated
Module is connected, and the output end that a reference value resets module is connected with a reference value adjusting module.
The automatic division module of road subsection and road traffic parameter in the present invention in road condition discrimination module connect in real time
Receive input of the output end of module with road traffic state real-time identification module to be connected, road traffic state real-time identification
The output end of module is connected with identification result output module.
The automatic division module of road subsection of the present invention is used to for a road to be divided into two subsegments U1 and U2 automatically, its length
Degree is expressed as dU1 and dU2, dU1 and the division of dU2 depends on that parameter includes entire road lengthFront signal light split t,
Highway layout saturation factor s,Represent that road limitation speed, a are the control parameters related to road overall length, b is to limit speed with road
Related control parameter is spent, is specifically divided according to equation below：
Road traffic state real-time identification module of the present invention completes traffic behavior real-time identification by following steps：It is right
Each road subsection sets up evaluation object single factor test collection Ui；Evaluation collection F is set up for each road subsectioni；Set up from single factor test collection
UiTo evaluation collection FiThe mapping of a fuzzy relation, single factor test evaluation matrix R is derived by Cartesian product corresponding relationi；The first order
Fuzzy Synthetic Evaluation, selection segmentation Gaussian Blur mathematical synthesis function is carried out comprehensive and is made normalized；Two grades obscure
Comprehensive Assessment；Fuzzy analysis judgement is carried out to two grades of result of determination, the result that urban road state is distinguished is drawn.
The output end of network congestion detection module is switched fast module and is connected with data communication in the present invention, data communication
It is switched fast the input of module to be connected with the output end of jitter value computing module in network congestion detection module, data communication
Being switched fast module includes threshold value comparing module, address assignment module, current service network signal intensity receiver module, current
Node updates/sets up module, wherein jitter value computing module with base station distance judge module, edge-triggered module, communication port
Output end be connected with threshold value comparing module, the output end of threshold value comparing module is connected with address assignment module, ground
Location distribute module updates/sets up module successively with present node and base station distance judge module, edge-triggered module, communication port
It is connected, the volume output end of current service network signal intensity receiver module is connected with threshold value comparing module.
Transmission delay rate of change acquisition module of the present invention continuous time discretization, using frame as discretization when
Between unit, TiTo Ti+1Interior totally 20 frame of time interval, uses DiRepresent the transmission delay of packet, propagation delay time DiComputing formula
For：Di=(Ri‐Si), wherein RiThe time of packet, S are received for receiving terminaliIt is the transmission time that packet is carried, calculates Ti‐1
To TiThe average value and T of transmission delay in timeiTo Ti+1In time the average value of transmission delay according to and obtain transmission delay
Rate of change DRi。
A reference value adjusting module of the present invention carries out time per unit adjustment a reference value：E=E+DRi× Δ t, wherein, E
It is desired value, Δ t is the time difference of two interframe.
It is of the present invention to judge whether that resetting a reference value module judges whether to need to reset a reference value：If so, then passing through base
Quasi- value resets module and resets to a reference value：E=Di+DRi×(Ti+1‐Ti)/2, are then fed into jitter value computing module, otherwise directly
Pick into jitter value computing module.
Jitter value computing module is averaged the difference with a reference value in the present invention, and the absolute value of this difference is done refers to
Number is smooth, calculates jitter value JiFor：Ji=(15 × Ji‐1+|Di- E |)/16, characterize network congestion, jitter value with jitter value
More big then imminent network congestion is more serious.
Operationally, monitor supervision platform completes the data with more than two user terminals by radio communication circuit to the present invention
Link up, user terminal is arranged in user's vehicle, the serial/parallel conversion module in user terminal provides user terminal and vehicle BMS
Communication port, obtain vehicle traveling information, and acquired information is stored in memory, additionally, camera crawl in real time or
Present road image information is shot with video-corder, and gathered image is stored in memory, data are uploaded through radio communication circuit in memory
To monitor supervision platform, the data reception module in monitor supervision platform is received to upload data and be sent to data analysis module and is analyzed
Treatment, data analysis module makes condition of road surface identification result by analysis, then by result display output, while will can tie
Fruit is issued to user terminal by data distributing module；During user terminal and monitor supervision platform enter row data communication, lead to
Cross network congestion detection module to detect communication channel, and channel is switched according to testing result in time, so as to ensure data
Real-time Transmission, the present invention compared with prior art, with communications cost is low, transmission is reliable, can alleviate road traffic blocking
Etc. significant advantage.
Brief description of the drawings：
Accompanying drawing 1 is structured flowchart of the invention.
Accompanying drawing 2 is the block diagram of data analysis module in the present invention.
Accompanying drawing 3 is the structured flowchart of user terminal in the present invention.
Reference：Monitor supervision platform 1, user terminal 2, data reception module 3, data distributing module 4, data analysis module
5th, the automatic division module 7 of database 6, road subsection, road traffic parameter real-time reception module 8, road traffic state are distinguished in real time
Know module 9, identification result output module 10, local controller 11, camera 12, memory 13, power supply 14, telecommunication circuit 15,
Display circuit 16, touch screen 17, voice warning circuit 18, serial/parallel conversion module 19, the detection of d GPS locating module 20, network congestion
Module 21, data communication is switched fast module 22.
Specific embodiment：
The present invention is further illustrated below in conjunction with the accompanying drawings.
As shown in drawings, the present invention proposes a kind of Intelligent traffic management systems, it is characterised in that be provided with monitor supervision platform 1 with
And more than two user terminals 2, monitor supervision platform 1 is with user terminal 2 through radio communication circuit completion data communication, the monitoring
Platform 1 include data reception module 3, data distributing module 4, data analysis module 5, database 6, wherein data reception module,
Data distributing module and data analysis module are connected with database 6 respectively, and road like is provided with the data analysis module 5
State discrimination module, the road condition discrimination module includes the automatic division module 7 of road subsection, road traffic parameter real-time reception
Module 8, road traffic state real-time identification module 9 and identification result output module 10, the user terminal 2 are provided with local control
Device processed 11, camera 12, memory 13, power supply 14, telecommunication circuit 15, display circuit 16, touch screen 17, voice warning circuit
18th, serial/parallel conversion module 19, d GPS locating module 20, wherein local controller 11 respectively with camera 12, memory 13, power supply
14th, telecommunication circuit 15, display circuit 16, voice warning circuit 18, serial/parallel conversion module 19, d GPS locating module 20 are connected,
Display circuit 16 is connected with touch screen 17.
User terminal is connected with monitor supervision platform by ethernet communication circuit in the present invention, be provided with the user terminal with
The network congestion detection module 21 and data communication that local controller is connected are switched fast module 22, wherein network congestion detection
Module 21 includes transmission delay rate of change acquisition module, a reference value adjusting module, judges whether to reset a reference value module, a reference value
Reset module, jitter value computing module, wherein transmission delay rate of change acquisition module, a reference value adjusting module, judge whether weight
Put a reference value module to be sequentially connected, judge whether that the output end for resetting a reference value module resets module and shake with a reference value respectively
Value computing module is connected, and the output end that a reference value resets module is connected with a reference value adjusting module.
The automatic division module 7 of road subsection and road traffic parameter in the present invention in road condition discrimination module connect in real time
Receive input of the output end of module 8 with road traffic state real-time identification module 9 to be connected, road traffic state is distinguished in real time
The output end for knowing module 9 is connected with identification result output module 10.
The automatic division module 7 of road subsection of the present invention is used to for a road to be divided into two subsegments U1 and U2 automatically, its
Length is expressed as dU1 and dU2, dU1 and the division of dU2 depends on that parameter includes entire road lengthFront signal light split
T, highway layout saturation factor s,Represent that road limitation speed, a are the control parameters related to road overall length, b is limited with road
The control parameter of velocity correlation, specifically divides according to equation below：
Road traffic state real-time identification module 9 of the present invention completes traffic behavior real-time identification by following steps：
Evaluation object single factor test collection U is set up to each road subsectioni；Evaluation collection F is set up for each road subsectioni；Set up from single factor test
Collection UiTo evaluation collection FiThe mapping of a fuzzy relation, single factor test evaluation matrix R is derived by Cartesian product corresponding relationi；First
Level Fuzzy Synthetic Evaluation, selection segmentation Gaussian Blur mathematical synthesis function is carried out comprehensive and is made normalized；Two grades of moulds
Paste Comprehensive Assessment；Fuzzy analysis judgement is carried out to two grades of result of determination, the result that urban road state is distinguished is drawn.
The output end of network congestion detection module 21 is switched fast module 22 and is connected with data communication in the present invention, data
Communication is switched fast the input of module and is connected with the output end of jitter value computing module in network congestion detection module, data
Communication be switched fast module including threshold value comparing module, address assignment module, current service network signal intensity receiver module,
Present node updates/sets up module with base station distance judge module, edge-triggered module, communication port, and wherein jitter value is calculated
The output end of module is connected with threshold value comparing module, and the output end of threshold value comparing module is connected with address assignment module
Connecing, address assignment module and present node and base station distance judge module, edge-triggered module, communication port update/set up mould
Block is sequentially connected and connects, and the volume output end of current service network signal intensity receiver module is connected with threshold value comparing module.
Transmission delay rate of change acquisition module of the present invention continuous time discretization, using frame as discretization when
Between unit, TiTo Ti+1Interior totally 20 frame of time interval, uses DiRepresent the transmission delay of packet, propagation delay time DiComputing formula
For：Di=(Ri‐Si), wherein RiThe time of packet, S are received for receiving terminaliIt is the transmission time that packet is carried, calculates Ti‐1
To TiThe average value and T of transmission delay in timeiTo Ti+1In time the average value of transmission delay according to and obtain transmission delay
Rate of change DRi。
A reference value adjusting module of the present invention carries out time per unit adjustment a reference value：E=E+DRi× Δ t, wherein, E
It is desired value, Δ t is the time difference of two interframe.
It is of the present invention to judge whether that resetting a reference value module judges whether to need to reset a reference value：If so, then passing through base
Quasi- value resets module and resets to a reference value：E=Di+DRi×(Ti+1‐Ti)/2, are then fed into jitter value computing module, otherwise directly
Pick into jitter value computing module.
Jitter value computing module is averaged the difference with a reference value in the present invention, and the absolute value of this difference is done refers to
Number is smooth, calculates jitter value JiFor：Ji=(15 × Ji‐1+|Di- E |)/16, characterize network congestion, jitter value with jitter value
More big then imminent network congestion is more serious.
Operationally, monitor supervision platform completes the data with more than two user terminals by radio communication circuit to the present invention
Link up, user terminal is arranged in user's vehicle, the serial/parallel conversion module in user terminal provides user terminal and vehicle BMS
Communication port, obtain vehicle traveling information, and acquired information is stored in memory, additionally, camera crawl in real time or
Present road image information is shot with video-corder, and gathered image is stored in memory, data are uploaded through radio communication circuit in memory
To monitor supervision platform, the data reception module in monitor supervision platform is received to upload data and be sent to data analysis module and is analyzed
Treatment, data analysis module makes condition of road surface identification result by analysis, then by result display output, while will can tie
Fruit is issued to user terminal by data distributing module；During user terminal and monitor supervision platform enter row data communication, lead to
Cross network congestion detection module to detect communication channel, and channel is switched according to testing result in time, so as to ensure data
Real-time Transmission, the present invention compared with prior art, with communications cost is low, transmission is reliable, can alleviate road traffic blocking
Etc. significant advantage.
Claims (7)
1. a kind of Intelligent traffic management systems, it is characterised in that be provided with monitor supervision platform and more than two user terminals, monitors
Platform completes data communication with user terminal through radio communication circuit, and the monitor supervision platform is included under data reception module, data
Hair module, data analysis module, database, are provided with road condition discrimination module, the road like in the data analysis module
State discrimination module includes that the automatic division module of road subsection, road traffic parameter real-time reception module, road traffic state are real-time
Identification module and identification result output module, the user terminal are provided with local controller, camera, memory, power supply, logical
Letter circuit, display circuit, touch screen, voice warning circuit, serial/parallel conversion module, wherein d GPS locating module, local controller
Respectively with camera, memory, power supply, telecommunication circuit, display circuit, voice warning circuit, serial/parallel conversion module, GPS location
Module is connected, and display circuit is connected with touch screen.
2. a kind of Intelligent traffic management systems according to claim 1, it is characterised in that user terminal is passed through with monitor supervision platform
Cross the connection of ethernet communication circuit, be provided with the user terminal network congestion detection module that is connected with local controller and
Data communication is switched fast module, and wherein network congestion detection module includes that transmission delay rate of change acquisition module, a reference value are adjusted
Mould preparation block, judge whether that resetting a reference value module, a reference value resets module, jitter value computing module, wherein transmission delay change
Rate acquisition module, a reference value adjusting module, judge whether reset a reference value module be sequentially connected, judge whether reset a reference value mould
The output end of block resets module and jitter value computing module and is connected with a reference value respectively, a reference value reset the output end of module with
A reference value adjusting module is connected.
3. a kind of Intelligent traffic management systems according to claim 1, it is characterised in that in road condition discrimination module
The output end of the automatic division module of road subsection and road traffic parameter real-time reception module is distinguished in real time with road traffic state
The input for knowing module is connected, and the output end of road traffic state real-time identification module is connected with identification result output module
Connect.
4. a kind of Intelligent traffic management systems according to claim 1, it is characterised in that the automatic division module of road subsection
For a road to be divided into two subsegments U1 and U2 automatically, its length is expressed as dU1 and dU2, dU1 and the division of dU2 takes
Certainly parameter includes entire road lengthFront signal light split t, highway layout saturation factor s,Represent road limitation speed
Degree, a are the control parameters related to road overall length, and b is the control parameter that velocity correlation is limited with road, specifically according to following public affairs
Formula is divided：
5. a kind of Intelligent traffic management systems according to claim 1, it is characterised in that the road traffic state is real-time
Identification module completes traffic behavior real-time identification by following steps：Evaluation object single factor test collection is set up to each road subsection
Ui；Evaluation collection F is set up for each road subsectioni；Set up from single factor test collection UiTo evaluation collection FiA fuzzy relation mapping,
Single factor test evaluation matrix R is derived by Cartesian product corresponding relationi；First order Fuzzy Synthetic Evaluation, selection segmentation Gaussian Blur
Mathematical synthesis function is carried out comprehensive and is made normalized；Two-stage Fuzzy Comprehensive Evaluation；Mould is carried out to two grades of result of determination
Paste analysis judgement, draws the result that urban road state is distinguished.
6. a kind of Intelligent traffic management systems according to claim 1, it is characterised in that network congestion detection module it is defeated
Go out end to be switched fast module with data communication and be connected, data communication is switched fast the input and network congestion detection mould of module
The output end of jitter value computing module is connected in block, and data communication is switched fast module includes threshold value comparing module, address
Distribute module, current service network signal intensity receiver module, present node and base station distance judge module, edge-triggered mould
Block, communication port update/set up module, and the wherein output end of jitter value computing module is connected with threshold value comparing module, door
The output end of limit value comparing module is connected with address assignment module, and address assignment module judges with present node with base station distance
Module, edge-triggered module, communication port update/set up module and be sequentially connected and connect, and current service network signal intensity receives mould
The volume output end of block is connected with threshold value comparing module.
7. a kind of Intelligent traffic management systems according to claim 1, it is characterised in that the transmission delay rate of change is obtained
Modulus block continuous time discretization, using frame as the chronomere of discretization, TiTo Ti+1Interior totally 20 frame of time interval, uses Di
Represent the transmission delay of packet, propagation delay time DiComputing formula be：Di=(Ri‐Si), wherein RiFor receiving terminal receives data
The time of bag, SiIt is the transmission time that packet is carried, calculates Ti‐1To TiThe average value and T of transmission delay in timeiTo Ti+1When
The average value of interior transmission delay according to and obtain the rate of change DR of transmission delayi；The a reference value adjusting module carries out every list
Position time adjustment a reference value：E=E+DRi× Δ t, wherein, E is desired value, and Δ t is the time difference of two interframe；The judgement is
No replacement a reference value module judges whether to need to reset a reference value：If so, then reset module by a reference value a reference value is reset
For：E=Di+DRi×(Ti+1‐Ti)/2, are then fed into jitter value computing module, are otherwise sent directly into jitter value computing module；Tremble
The difference that dynamic value computing module is averaged with a reference value, and absolute value to this difference does exponential smoothing, calculating jitter value
JiFor：Ji=(15 × Ji‐1+|Di- E |)/16, characterize network congestion, the more big then imminent net of jitter value with jitter value
Network congestion is more serious.
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| CN201611234349.7A CN106781483A (en) | 2016-12-28 | 2016-12-28 | Intelligent traffic management systems |
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| CN201611234349.7A CN106781483A (en) | 2016-12-28 | 2016-12-28 | Intelligent traffic management systems |
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| CN115914298B (en) * | 2022-11-21 | 2023-10-31 | 常州天涛通信设备有限公司 | Communication system for highway remote terminal |
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