CN108922203A - A kind of regional traffic whistle control system based on software defined network - Google Patents
A kind of regional traffic whistle control system based on software defined network Download PDFInfo
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- CN108922203A CN108922203A CN201810837646.3A CN201810837646A CN108922203A CN 108922203 A CN108922203 A CN 108922203A CN 201810837646 A CN201810837646 A CN 201810837646A CN 108922203 A CN108922203 A CN 108922203A
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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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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
- G08G1/081—Plural intersections under common control
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
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Abstract
The present invention relates to a kind of regional traffic whistle control system based on software defined network, it passes through isolation signals plane and control plane, simplify configuration, management and optimization, realize the centralized management and control of traffic signalization equipment, entire signal network reliability and safety are promoted, the compatibility and flexibility of regional traffic whistle control system are improved.By the abstract unified programming interface for realizing traffic signals network, regional traffic signal control algolithm is enable faster to land, accelerates innovation and application；By OpenSignal agreement, the hardware requirement and cost of traffic signalization equipment itself are on the one hand reduced, the equipment supplier's ecology on the other hand broken the seal reduces construction and maintenance cost, forms the market environment of orderly competition.
Description
Technical field
The present invention relates to a kind of intelligent transport technologies, believe more particularly, to a kind of regional traffic based on software defined network
Number control system.
Background technique
Traffic congestion is the universal problem that many big cities in the world face.As the main means for alleviating traffic congestion, hand over
Messenger optimal control experienced the development course of point, line, surface, and regional traffic signal control at present becomes what city mainly used
Traffic signal optimization control mode.With the fine-grained management of expansion and the traffic of city size, the traffic in urban area is believed
Number control equipment is more and more, such as fast road ramp lamp, tide lamp for vehicle lane, variable guided vehicle road lamp etc., the traffic letter of composition
Number network (Transportation Signal Networking, TSN) is increasing.
Regional traffic whistle control system goes back face while in face of increasingly complicated traffic signals network bring challenge
Face the increasingly various challenge, such as traffic diverging, evacuation in public emergency, large-scale activity of regulatory requirement etc..
However, in practice because of the gradually reasons such as more exchange device, project bidding, the road teleseme etc. that city is installed in a certain period
The manufacturer of traffic signalization equipment or model may be different, and existing regional traffic whistle control system is very in the market
Closing, the platform and equipment of different vendor are difficult to be mutually butted, even if by country or professional standard (such as NTCIP), also only
It can guarantee the interoperability of low level.Such case leads to urban traffic control system once upgrading, it is possible to must replace
All equipment, while causing great human and material resources and cost wastes, processing can not be absorbed in by also resulting in experts and scholars
The complexity of traffic flow, it is also necessary to face various engineering complexities, otherwise research achievement is very difficult to apply in practice.
Traditional network equipment is similar with the IBM mainframe of the sixties in last century, network device hardware, operating system and net
Network application three parts are tightly coupled together one closed system of composition.This three parts interdepends, and is usually under the jurisdiction of same
Network equipment vendor, the innovation and evolution of each section require that rest part makes same upgrading.In traditional IT architecture
Network, according to business demand deployment it is online after, if business demand changes, remodify corresponding network equipment (routing
Device, interchanger, firewall) on configuration be a very cumbersome thing.In the fast changing business ring in (movement) internet
Under border, the high stable and high-performance of network are also insufficient for business demand, and flexibility and agility are more crucial instead.
In this background, Nick McKeown et al. proposes SDN's (Software-Defined Networking)
New network framework, its biggest characteristic is that being the control plane with loose coupling and data plane, the network for supporting centralization
State control and realization bottom-layer network facility are to the transparent of upper layer application.As shown in Figure 1, SDN is by the control on the network equipment
Power is separated, and shields the difference from underlay network device without underlay network device is relied on by the controller management concentrated
It is different.And control be it is wide-open, user can with it is customized it is any want realize network routing and transmission rule strategy, thus
It is more flexible and intelligent.
In view of this, the invention proposes a kind of regional traffic whistle control system based on software defined network, referred to as
S-TSN (Software-DefinedTSN, S-TSN).
Summary of the invention
The purpose of the present invention is to provide a kind of regional traffic whistle control system based on software defined network, to improve
The compatibility and flexibility of regional traffic whistle control system.
To achieve the above object, the technical solution adopted by the present invention is that：
A kind of regional traffic whistle control system based on software defined network comprising S-TSN application layer, S-TSN control
Device and S-TSN signals layer processed；
The S-TSN application layer is run on application server, for disposing all kinds of regional traffic signal control algolithms；
The S-TSN controller, runs on data server, and S-TSN controller is S- by S-TSN northbound interface
TSN application layer provides network view, while receiving the control instruction that S-TSN application layer decision goes out；It will by S-TSN southbound interface
Control instruction translates into OpenSignal message and is sent to traffic signalization equipment, while receiving in traffic signalization equipment
The traffic flow parameter information of biography；In the network view of S-TSN controller, the signal of intersection or fast road ramp mouth in road network
Lamp control indicates that the side in tide lane, variable guided vehicle road or lane lamp network belongs to the nodal community in network
Property indicate；
T-TSN signals layer is made of several traffic signalization equipment, is stored in each traffic signalization equipment more
Grade channel table, every channel table are made of multiple channel list items, and each channel list item has corresponded to a clearance in signal network
Direction.
The channel list item is indicated by a five-tuple：<Time Anchor, Edge Src, Edge Dst, Action,
Duration>, wherein Time Anchor is time anchor, is the remainder in period total number of seconds for cyclical signal, for non-
Cyclical signal is then the remainder of the total number of seconds of whole day；Edge Src is the prime direction in channel, using corresponding section in the collection E of side
Number indicates；Edge Dst is the target direction in channel, and being numbered using section corresponding in the collection E of side is indicated；Action is movement,
Generally green light, red light, yellow sudden strain of a muscle, blue flash, amber light, yellow sudden strain of a muscle；Duration is the duration, is * when being always maintained at.
After adopting the above scheme, a kind of regional traffic whistle control system based on software defined network of the present invention by every
From signal plane and control plane, simplifies configuration, management and optimization, realize the centralized management and control of traffic signalization equipment
System, promotes entire signal network reliability and safety, improves the compatibility and flexibility of regional traffic whistle control system.
The present invention enables regional traffic signal control algolithm faster by the abstract unified programming interface for realizing traffic signals network
Innovation and application is accelerated in landing；By OpenSignal agreement, the hardware requirement of traffic signalization equipment itself is on the one hand reduced
And cost, the equipment supplier's ecology on the other hand broken the seal reduce construction and maintenance cost, form the market of orderly competition
Environment.
Detailed description of the invention
Fig. 1 is the comparison diagram of traditional network and SDN network；
Fig. 2 is the regional traffic whistle control system structure chart based on software defined network；
Fig. 3 a is that the Weighted Complex Networks of intersection indicate example；
Fig. 3 b is that the Weighted Complex Networks of ring road mouth indicate example；
Fig. 4 is the state change in channel and the coordination of multichannel；
Fig. 5 is the universal programming model of OpenSignal equipment.
Specific embodiment
As shown in Fig. 2, present invention discloses a kind of regional traffic whistle control system based on software defined network, packet
Include S-TSN application layer (S-TSN Application Layer), S-TSN controller (S-TSN Controller Layer) and
S-TSN signals layer (S-TSN Infrastructure Layer), S-TSN controller pass through S-TSN northbound interface (S-TSN
Northbound Interface) it is connect with S-TSN application layer, in addition, S-TSN controller also passes through S-TSN southbound interface (S-
TSN Southbound Interface) it is connect with S-TSN signals layer.
Wherein, S-TSN application layer is run on application server, for disposing all kinds of regional traffic signal control algolithms,
Such as SCOOT system can be widely used in similar current world wide, the Real-time Traffic Information obtained according to wagon detector
Carry out Optimization Solution and go out most suitable traffic signalization parameter (including period, split and phase etc.), to realize to traffic
The target of network self-adapting coordinated control.Theoretically, traditional all kinds of regional traffic signal control algolithms can be transplanted to S-
In TSN application layer.
S-TSN controller, runs on data server, provides a consistent network view for S-TSN application layer, and
The request of S-TSN application layer is forwarded to S-TSN signals layer.Specifically, S-TSN controller is S- by S-TSN northbound interface
TSN application layer provides network view, while receiving the control instruction that S-TSN application layer decision goes out；It will by S-TSN southbound interface
Control instruction translates into OpenSignal message and is sent to traffic signalization equipment, while the traffic flow ginseng that receiving device uploads
The information such as number.The abstract signal network view that S-TSN controller provides, is the key that entire traffic signals Network Programmable.
Urban traffic network is the complex network of one " natural ", is well suited for modeling it using complex network method, is
We are indicated road network using original method (using crossing as node, using section as side) for this.Fig. 3 a and Fig. 3 b are opened up respectively
Show that the Weighted Complex Networks of two kinds of main road network elements (intersection, ring road mouth) indicate, specifically, the road that note complex network indicates
Net is G (V, E), and V is node collection, and E is side collection.
The Signalized control of intersection or fast road ramp mouth can be indicated with the nodal community in network in road network, tide
Lane, variable guided vehicle road or lane lamp can indicate (influence capacity), so far, road traffic with the side attribute in network
State and controllable traffic signals are integrated expression in Weighted Complex Networks.S-TSN application layer passes through S-TSN northbound interface from S-
TSN controller obtains road grid traffic situation, and by the logical operation of series, network behavior request is passed through S-TSN northbound interface
It is sent to S-TSN controller.
S-TSN signals layer is made of several traffic signalization equipment, is researched and developed and is supported using existing embedded technology
The novel traffic signal of OpenSignal agreement controls equipment, and is installed in practical crossing.Channel table is OpenSignal association
Most crucial component part in view, channel table are the control tables on traffic signals equipment control chip, and every channel table has multiple
Channel list item (Channel Entry) composition, each channel list item have corresponded to a clearance direction in signal network.It is each logical
Road list item is indicated by a five-tuple：<Time Anchor, Edge Src, Edge Dst, Action, Duration>, each element
Meaning it is as shown in the table：
Table 1
Each traffic signalization equipment includes one or more channels, and Fig. 4 is let pass with 4 directions of crossroad is
Example illustrates movement (state) variation in 4 channels.Possess multistage channel table, each channel table in traffic signalization equipment
There are one or more safe states (Safe Mode), such as the state in Fig. 4 at the end of two stages, for cutting between channel table
It changes.
Channel table simplifies the hardware composition and software logic of traffic signalization equipment, reduces equipment cost, leads to simultaneously
Cross the substitutability of standard OpenSignal protocol realization equipment.Traffic signalization equipment is usually all time driving,
After booting after a series of initialization such as IO, clock, repeat by the second (or Geng little chronomere) using logic, Fig. 5 exhibition
Shown support OpenSignal traffic signalization equipment universal programming model, core be to look for maintenance channel table,
It is timely updated channel status according to the time anchor point of channel table.
It stores multistage channel table in traffic signalization equipment, wherein there is the channel table of a system default, works as network
When reason and S-TSN controller disconnect, the channel table will be executed.
After successively building S-TSN application layer, S-TSN controller and S-TSN signals layer, pass through existing IP network technical battery
Each server and each traffic signalization equipment for supporting OpenSignal agreement are connect, can realize network communication mutually,
I.e. completion uses building for the regional traffic whistle control system of S-TSN framework.When system is run, it is necessary first to configure signals layer
The default channel table of each equipment simultaneously starts each equipment, then successively starts S-TSN controller again and the region of S-TSN application layer is handed over
Messenger control algolithm.
Claims (2)
1. a kind of regional traffic whistle control system based on software defined network, it is characterised in that：The system comprises S-TSN
Application layer, S-TSN controller and S-TSN signals layer；
The S-TSN application layer is run on application server, for disposing all kinds of regional traffic signal control algolithms；
The S-TSN controller, runs on data server, and S-TSN controller is answered by S-TSN northbound interface for S-TSN
Network view is provided with layer, while receiving the control instruction that S-TSN application layer decision goes out；It will be controlled by S-TSN southbound interface
Instruction translation is sent to traffic signalization equipment at OpenSignal message, while receiving the upload of traffic signalization equipment
Traffic flow parameter information；In the network view of S-TSN controller, the signal lamp control of intersection or fast road ramp mouth in road network
System indicates with the nodal community in network, the side attribute table in tide lane, variable guided vehicle road or lane lamp network
Show；
S-TSN signals layer is made of several traffic signalization equipment, is stored in each traffic signalization equipment multistage logical
Road table, every channel table are made of multiple channel list items, and each channel list item has corresponded to a clearance direction in signal network.
2. a kind of regional traffic whistle control system based on software defined network according to claim 1, feature exist
In：The channel list item is indicated by a five-tuple：<Time Anchor, Edge Src, Edge Dst, Action,
Duration>, wherein Time Anchor is time anchor, is the remainder in period total number of seconds for cyclical signal, for non-
Cyclical signal is then the remainder of the total number of seconds of whole day；Edge Src is the prime direction in channel, using corresponding section in the collection E of side
Number indicates；Edge Dst is the target direction in channel, and being numbered using section corresponding in the collection E of side is indicated；Action is movement,
Generally green light, red light, yellow sudden strain of a muscle, blue flash, amber light, yellow sudden strain of a muscle；Duration is the duration, is * when being always maintained at.
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| CN112767717A (en) * | 2021-01-25 | 2021-05-07 | 泉州装备制造研究所 | Regional traffic signal coordination control method and system oriented to complex traffic control environment |
| CN113361051A (en) * | 2021-06-02 | 2021-09-07 | 东北大学秦皇岛分校 | Road network control method based on controllability and importance |
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| CN113361051A (en) * | 2021-06-02 | 2021-09-07 | 东北大学秦皇岛分校 | Road network control method based on controllability and importance |
| CN113361051B (en) * | 2021-06-02 | 2023-03-14 | 东北大学秦皇岛分校 | Road network control method based on controllability and importance |
| CN114802058A (en) * | 2022-06-23 | 2022-07-29 | 北京理工大学 | Intelligent electric vehicle regional architecture vehicle-mounted networked control system and scheduling method |
| CN114802058B (en) * | 2022-06-23 | 2022-09-30 | 北京理工大学 | Intelligent electric vehicle regional architecture vehicle-mounted networked control system and scheduling method |
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