CN108242159B - Urban traffic area coordinated control system based on edge computing nodes - Google Patents
Urban traffic area coordinated control system based on edge computing nodes Download PDFInfo
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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
- G08G1/07—Controlling traffic signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/302—Route determination based on requested QoS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
Abstract
An urban traffic area coordination control system based on edge computing nodes comprises a control center, a plurality of edge computing nodes, a plurality of IP terminal devices and vehicle-mounted equipment; the control center is connected with the edge computing node and part of terminal equipment through a broadband network, and the edge computing node is connected with the terminal equipment and vehicle-mounted equipment through the broadband network or a wireless network; the control center automatically generates or manually sets and determines edge computing nodes in the area as primary computing nodes or secondary computing nodes according to the data information; and the edge computing node acquires the data of the related interrupt equipment or the related computing node according to the self level, generates a control scheme and executes the control scheme. According to the invention, each edge node can be changed into a high-priority node in a plurality of edge nodes in an area according to actual conditions, and the low-priority node modifies a scheme issued by the high-priority node according to the association degree, so that the method is flexible and the computing capacity can be saved.
Description
Technical Field
The invention relates to the field of urban traffic signal area coordination control, in particular to an urban traffic area coordination control system based on edge computing nodes.
Background
With the development of economic society and traffic signal control technology, regional coordination control becomes the necessity of traffic signal control. With the progress of terminal devices, the data volume of intersection information is larger and larger, and the data transmission capability of the current network cannot meet the requirement of traffic signal control real-time, so that coordinated control based on central calculation faces a bottleneck. Meanwhile, with the development of hardware technology, the computing capacity of the traffic signal controller is more and more powerful, the traffic signal controller is not fully utilized, and the problem of resource waste exists.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the urban traffic area coordination control system based on the edge computing node, which not only can fully utilize the computing capacity of the traffic signal controller, but also can solve the problem of insufficient network data transmission capacity.
The technical problems to be solved by the invention are realized by the following technical proposal. The invention relates to an urban traffic area coordination control system based on edge computing nodes, which is characterized in that: the coordination control system at least comprises a control center, a plurality of edge computing nodes, a plurality of IP terminal devices and vehicle-mounted equipment; the control center is connected with the edge computing node and part of terminal equipment through a broadband network, and the edge computing node is connected with the terminal equipment and vehicle-mounted equipment through the broadband network or a wireless network; the control center automatically generates or manually sets and determines edge computing nodes in the area as primary computing nodes or secondary computing nodes according to the data information; and the edge computing node acquires the data of the related interrupt equipment or the related computing node according to the self level, generates a control scheme and executes the control scheme.
The coordination control system provided by the invention has the further preferable technical scheme that: the control center is connected with the edge computing node through a broadband network and at least connected with the video monitoring equipment through the broadband network; the control center sets an edge computing node as a primary edge computing node in the area according to the data information of the video monitoring equipment, and the other nodes are secondary edge computing nodes; or manually setting the node level, wherein the manually set priority is higher than the automatic setting according to the video monitoring equipment.
The coordination control system provided by the invention has the further preferable technical scheme that: the level of the edge computing node is set by the system or manually according to the condition of the intersection.
The coordination control system provided by the invention has the further preferable technical scheme that: the control center takes the first-level edge computing nodes as the center according to the video data information, and determines the association strength coefficients between each second-level edge computing node and the first-level edge computing nodes in the area; the control center sets the threshold value of the association strength coefficient automatically or manually.
The coordination control system provided by the invention has the further preferable technical scheme that: the edge computing node is connected with the terminal equipment through a broadband network or a wireless network and is connected with the vehicle-mounted equipment through the wireless network; the second-level edge computing node obtains terminal equipment data of the intersection where the node is located, and the first-level edge computing node obtains terminal equipment data or node computing data of other nodes besides the terminal equipment data of the intersection where the node is located; and the edge computing node generates a control scheme according to the data information and issues and executes the control scheme.
The coordination control system provided by the invention has the further preferable technical scheme that: the first-level edge computing node determines and acquires terminal equipment data information of the second-level node or computing data of the node according to the association strength coefficient of each node and the threshold value; when the association strength coefficient of the secondary node is larger than the threshold value, the primary node acquires the terminal equipment data information of the intersection where the primary node is located, and when the association strength coefficient of the secondary node is smaller than the threshold value, the primary node only acquires the calculation result information of the node.
The coordination control system provided by the invention has the further preferable technical scheme that: the first-level edge computing node generates a coordination control scheme according to the acquired information; the scheme comprises a control scheme of the own node and a control scheme of other nodes in the area; the self scheme is directly executed, and after other node control schemes are issued, the secondary node executes the scheme after the scheme is adjusted according to the self data information; after the scheme issued by the primary node is obtained by the secondary node, the scheme is adjusted according to the data information of the secondary node, the adjusting authority is determined by the association strength coefficient between the secondary node and the primary node, and the larger the coefficient is, the smaller the adjusting authority is.
The coordination control system provided by the invention has the further preferable technical scheme that: the vehicle-mounted equipment is connected with the nearest edge computing node through a wireless network, and the signal lamp state information of the approaching intersection is obtained while the vehicle destination and the vehicle speed information are output.
The coordination control system provided by the invention has the further preferable technical scheme that: the edge computing node is a traffic signal controller; the traffic signal controller comprises a processing unit, a storage unit, an input-output interface unit and a wireless communication unit. The traffic signal controllers in the area are connected through a broadband network.
The coordination control system provided by the invention has the further preferable technical scheme that: the IP terminal equipment comprises an information input device and an information output device; the information input device comprises a video monitoring device, a flow monitoring device and a vehicle speed measuring and calculating device; the information output device comprises a signal output device and an information release device; the vehicle-road coordination vehicle-mounted equipment is not only an information input equipment but also an information output equipment.
Compared with the prior art, the invention has the following advantages:
1. the edge computing node bears the function of regional coordination control, fully utilizes the computing capability of the traffic signal controller, reduces the computing pressure of a control center, also reduces the data transmission pressure of a broadband network, and ensures the real-time performance of signal control.
2. The automatic adjustment of the priority of the edge computing node also represents the adjustment of the control priority of the traffic intersection signal, and can effectively ensure the effective and rapid adjustment of key traffic nodes or the intersection traffic with emergency.
3. The setting of the association strength coefficient can flexibly set the key point of coordination control in the area according to the actual traffic condition in the area. The correlation strength coefficient is generally higher, the calculation amount of the first-level nodes is larger, the correlation strength coefficient is generally lower, the calculation amount of the first-level nodes is smaller, and the correlation strength can be flexibly set according to traffic flow conditions and the calculation capacity of the first-level nodes so as to ensure that the calculation capacity of the edge calculation nodes is fully utilized within an allowable range.
4. The communication between the edge computing node and the vehicle-mounted equipment can more accurately acquire the real data of the road traffic flow so as to adjust the signal control scheme to be optimal, provide an optimal driving route for the motor vehicle, and improve the traffic efficiency of the whole road through bidirectional interaction.
The system can utilize the computing power of the edge node to bear the work of the original control center under the condition of limited network transmission capacity; each edge node can become a high priority node in a plurality of edge nodes in an area according to actual conditions to lead the work of other nodes, and the process is dynamic. The low-priority node modifies the scheme issued by the high-priority node with a certain authority according to the association degree, so that the method is flexible and the computing capacity can be saved.
Drawings
Fig. 1 is a control schematic block diagram of the system of the present invention.
Detailed Description
Specific embodiments of the invention are described further below in order to facilitate a further understanding of the invention by those skilled in the art without limiting the scope of the claims thereto.
Embodiment 1 referring to fig. 1, an urban traffic area coordination control system based on edge computing nodes: the coordination control system at least comprises a control center, a plurality of edge computing nodes, a plurality of IP terminal devices and vehicle-mounted equipment; the control center is connected with the edge computing node and part of terminal equipment through a broadband network, and the edge computing node is connected with the terminal equipment and vehicle-mounted equipment through the broadband network or a wireless network; the control center automatically generates or manually sets and determines edge computing nodes in the area as primary computing nodes or secondary computing nodes according to the data information; and the edge computing node acquires the data of the related interrupt equipment or the related computing node according to the self level, generates a control scheme and executes the control scheme.
The control center is connected with the edge computing node through a broadband network and at least connected with the video monitoring equipment through the broadband network; the control center sets an edge computing node as a primary edge computing node in the area according to the data information of the video monitoring equipment, and the other nodes are secondary edge computing nodes; or manually setting the node level, wherein the manually set priority is higher than the automatic setting according to the video monitoring equipment.
The level of the edge computing node is set by the system or manually according to the condition of the intersection.
The control center takes the first-level edge computing nodes as the center according to the video data information, and determines the association strength coefficients between each second-level edge computing node and the first-level edge computing nodes in the area; the control center sets the threshold value of the association strength coefficient automatically or manually.
The first-level edge computing node determines and acquires terminal equipment data information of the second-level node or computing data of the node according to the association strength coefficient of each node and the threshold value; when the association strength coefficient of the secondary node is larger than the threshold value, the primary node acquires the terminal equipment data information of the intersection where the primary node is located, and when the association strength coefficient of the secondary node is smaller than the threshold value, the primary node only acquires the calculation result information of the node.
The edge computing node is connected with the terminal equipment through a broadband network or a wireless network and is connected with the vehicle-mounted equipment through the wireless network; the second-level edge computing node obtains terminal equipment data of the intersection where the node is located, and the first-level edge computing node obtains terminal equipment data or node computing data of other nodes besides the terminal equipment data of the intersection where the node is located; and the edge computing node generates a control scheme according to the data information and issues and executes the control scheme.
The first-level edge computing node generates a coordination control scheme according to the acquired information; the scheme comprises a control scheme of the own node and a control scheme of other nodes in the area; the self scheme is directly executed, and after other node control schemes are issued, the secondary node executes the scheme after the scheme is adjusted according to the self data information; after the scheme issued by the primary node is obtained by the secondary node, the scheme is adjusted according to the data information of the secondary node, the adjusting authority is determined by the association strength coefficient between the secondary node and the primary node, and the larger the coefficient is, the smaller the adjusting authority is.
The vehicle-mounted equipment is connected with the nearest edge computing node through a wireless network, and the signal lamp state information of the approaching intersection is obtained while the vehicle destination and the vehicle speed information are output.
The edge computing node is a traffic signal controller; the traffic signal controller comprises a processing unit, a storage unit, an input-output interface unit and a wireless communication unit.
The IP terminal equipment comprises an information input device and an information output device; the information input device comprises a video monitoring device, a flow monitoring device and a vehicle speed measuring and calculating device; the information output device comprises a signal output device and an information release device; the vehicle-road coordination vehicle-mounted equipment is not only an information input equipment but also an information output equipment.
Example 2: an area coordination control technology based on edge calculation nodes is adopted in a coordination control area formed by a plurality of intersections, and each intersection traffic signal controller is an edge calculation node. The traffic signal controllers communicate data with the control center through the broadband network, and the control center communicates with the intersection video monitoring equipment through the broadband network. The traffic signal controllers at all intersections are communicated through a broadband network, and in a single intersection, the traffic signal controllers and the IP equipment at the intersection are communicated in a wired or wireless mode. The IP-based terminal device includes an information input device and an information output device. The information input equipment at least comprises video monitoring equipment, flow monitoring equipment, vehicle speed measuring and calculating equipment and the like; the information output device at least comprises a signal output device, an information release device and the like; the vehicle-road coordination vehicle-mounted equipment is not only an information input equipment but also an information output equipment.
Each edge computing node in the region can be divided into a primary edge computing node and other secondary edge computing nodes, and the primary edge computing nodes can be automatically or manually set through a control center. For example, if the system defaults to set the intersection of the business center with larger traffic flow as a first-level node, the edge computing node generates a cooperative control scheme according to traffic conditions of the edge computing node and other nodes in the area, and executes the cooperative control scheme at the intersection and issues the cooperative control scheme to other intersection nodes for execution, so that the intersection can obtain the optimal traffic effect. When the control center automatically or artificially discovers that a traffic accident or sudden increase of the traffic flow occurs at a certain intersection through the video monitoring equipment, the intersection can be automatically or manually set as a first-level node, and a cooperative control scheme is generated on the basis of the first-level node, so that the traffic release scheme of the intersection is optimized fastest and most effectively.
The relationship between the secondary nodes in the primary node area is regulated by the strength of the association coefficient. The stronger the association coefficient between the same level node and a certain level node, the more the basic data of the crossing equipment can be used, and the better the synergic effect between the same level nodes can be. For example, the cooperative control area comprises a main road and a plurality of branches, if the cooperative control effect of the main road is to be enhanced, the first-level edge computing node can be arranged at the intersection of the main road, and the strength of the association coefficient between the same-level nodes of other intersections of the main road is improved, so that the cooperative control of the main road for cooperating with green waves or other modes can be realized, and the cooperative control between the intersections of the branches and the main road is weakened. For another example, a congested intersection with a significantly larger traffic flow exists in the coordination control area, in this case, the intersection can be set as a first-level edge calculation node, so that the association coefficient strength between the same-level nodes of the upstream and downstream intersections is improved, the association coefficient strength of other intersections is weakened, and therefore, the traffic conditions of the intersection and the upstream and downstream intersections can be considered more by the cooperative control scheme, and the traffic pressure relief of the busy intersection is realized.
The communication between the edge computing node and the vehicle-mounted equipment can more accurately acquire the real data of the road traffic flow so as to adjust the signal control scheme to be optimal, provide an optimal driving route for the motor vehicle, and improve the traffic efficiency of the whole road through bidirectional interaction. For example, the edge computing node can more effectively judge the road traffic situation by acquiring the vehicle speed information of the motor vehicle; the edge computing node feeds back traffic signal lamp conditions of the intersection to the vehicle owner, so that driving safety is improved; according to the destination information of the motor vehicle and the traffic conditions of each route, the optimal driving route is recommended for the vehicle owner, and the driving time of the vehicle owner is reduced while the traffic pressure of the road with heavy traffic is relieved. Based on the bidirectional interaction, dynamic balance between the motor vehicle and the road is realized.
Claims (7)
1. An urban traffic area coordination control system based on edge computing nodes is characterized in that: the coordination control system at least comprises a control center, a plurality of edge computing nodes, a plurality of IP terminal devices and vehicle-mounted equipment; the control center is connected with the edge computing node and part of terminal equipment through a broadband network, and the edge computing node is connected with the terminal equipment and vehicle-mounted equipment through the broadband network or a wireless network; the control center automatically generates or manually sets and determines edge computing nodes in the area as primary computing nodes or secondary computing nodes according to the data information; the edge computing node obtains the data of the related terminal equipment or the related computing node according to the self level, generates a control scheme and executes the control scheme;
the control center is also connected with the video monitoring equipment through a broadband network; the control center sets an edge computing node as a primary edge computing node in the area according to the data information of the video monitoring equipment, and the other nodes are secondary edge computing nodes; or manually setting the node level, wherein the manually set priority is higher than the automatic setting according to the video monitoring equipment;
the control center takes the first-level edge computing nodes as the center according to the video data information, and determines the association strength coefficients between each second-level edge computing node and the first-level edge computing nodes in the area; the control center automatically or manually sets the threshold value of the correlation intensity coefficient;
the first-level edge computing node determines and acquires terminal equipment data information of the second-level node or computing data of the node according to the association strength coefficient of each node and the threshold value; when the association strength coefficient of the secondary node is larger than the threshold value, the primary node acquires the terminal equipment data information of the intersection where the primary node is located, and when the association strength coefficient of the secondary node is smaller than the threshold value, the primary node only acquires the calculation result information of the node.
2. The coordinated control system according to claim 1, wherein: the level of the edge computing node is set by the system or manually according to the condition of the intersection.
3. The coordination control system according to claim 1, wherein the edge computing node is connected to the terminal device via a broadband network or a wireless network, and is connected to the on-vehicle equipment via a wireless network; the second-level edge computing node obtains terminal equipment data of the intersection where the node is located, and the first-level edge computing node obtains terminal equipment data or node computing data of other nodes besides the terminal equipment data of the intersection where the node is located; and the edge computing node generates a control scheme according to the data information and issues and executes the control scheme.
4. The coordination control system of claim 3, wherein the primary edge computing node generates a coordination control scheme based on the acquired information; the scheme comprises a control scheme of the own node and a control scheme of other nodes in the area; the self scheme is directly executed, and after other node control schemes are issued, the secondary node executes the scheme after the scheme is adjusted according to the self data information; after the scheme issued by the primary node is obtained by the secondary node, the scheme is adjusted according to the data information of the secondary node, the adjusting authority is determined by the association strength coefficient between the secondary node and the primary node, and the larger the coefficient is, the smaller the adjusting authority is.
5. The coordinated control system according to claim 1, wherein: the vehicle-mounted equipment is connected with the nearest edge computing node through a wireless network, and the signal lamp state information of the approaching intersection is obtained while the vehicle destination and the vehicle speed information are output.
6. The coordinated control system according to claim 1, wherein: the edge computing node is a traffic signal controller; the traffic signal controller comprises a processing unit, a storage unit, an input-output interface unit and a wireless communication unit.
7. The coordinated control system according to claim 1, wherein: the IP terminal equipment comprises an information input device and an information output device; the information input device comprises a video monitoring device, a flow monitoring device and a vehicle speed measuring and calculating device; the information output device comprises a signal output device and an information release device; the vehicle-road coordination vehicle-mounted equipment is not only an information input equipment but also an information output equipment.
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| CN109088755B (en) * | 2018-08-01 | 2021-07-27 | 南京大学 | Complex event processing system deployment method under edge calculation |
| CN109285100A (en) * | 2018-10-22 | 2019-01-29 | 国云科技股份有限公司 | A kind of smart city model system and its operation method based on edge calculations |
| CN109686082B (en) * | 2018-12-07 | 2020-08-07 | 西安电子科技大学 | Urban traffic monitoring system based on edge computing nodes and deployment method |
| CN109584570A (en) * | 2018-12-29 | 2019-04-05 | 浙江方大智控科技有限公司 | Traffic management method based on roadside fixed test equipment |
| CN112466116A (en) * | 2019-12-27 | 2021-03-09 | 北京航空航天大学 | Intersection group distributed control method based on edge calculation |
| CN111506408B (en) * | 2020-04-15 | 2023-06-16 | 辽宁大学 | Edge computing task scheduling method based on associated data set |
| CN111710177B (en) * | 2020-05-11 | 2021-07-27 | 华东师范大学 | Intelligent traffic signal lamp networking cooperative optimization control system and control method |
| CN113140118B (en) * | 2021-06-22 | 2021-09-17 | 华砺智行(武汉)科技有限公司 | Distributed single intersection control system, multiple intersection control system, method and medium |
| CN113705372B (en) * | 2021-08-10 | 2023-04-07 | 国网江苏省电力有限公司太仓市供电分公司 | AI identification system for join in marriage net job site violating regulations |
| CN114677847B (en) * | 2022-04-13 | 2023-05-23 | 华南理工大学 | Regional green wave coordination scheme solving method based on iterative optimization |
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