CN101599218A - A kind of bus priority wireless transmission system and control method thereof - Google Patents
A kind of bus priority wireless transmission system and control method thereof Download PDFInfo
- Publication number
- CN101599218A CN101599218A CNA200910115587XA CN200910115587A CN101599218A CN 101599218 A CN101599218 A CN 101599218A CN A200910115587X A CNA200910115587X A CN A200910115587XA CN 200910115587 A CN200910115587 A CN 200910115587A CN 101599218 A CN101599218 A CN 101599218A
- Authority
- CN
- China
- Prior art keywords
- module
- bus
- radio
- roadside
- teleseme
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of bus priority wireless transmission system and control method thereof, entity by wireless channel communication comprises the vehicle-mounted module of bus, roadside forwarding module and teleseme module, three generic modules comprise radio-cell and the external processing unit that is connected by the RS-232 serial ports separately respectively, by the RF car signal of forwarding module reception in roadside from the vehicle-mounted module of bus, address information in conjunction with roadside forwarding module itself obtains vehicle ID, the defence line of travelling, route and estimated time of arrival (ETA) etc. information, mode by point-to-point or routing forwarding is sent to the teleseme module, realizes the optimization to traffic light control system.The present invention has shortened the time of bus wait red light, on green time, give the public transit vehicle right-of-way, for being that the people trip of walking-replacing tool provides very big facility with the bus, both solve the problem that improves urban public transport service level and operational efficiency, embodied the fairness in distribution of right of way again.
Description
Technical field
The present invention relates to intelligent transportation control technology field, relate in particular to a kind of based on current traffic signal control system and the method thereof of transmission of wireless signals realization public traffic in priority.
Background technology
Along with the expansion of urban construction scale, the quantity of various types of vehicles unprecedentedly rises suddenly and sharply.For any city, the speed of widening of road is unable to catch up with the growth rate of motor vehicle forever, and it is unpractical leaning on widening road to solve and blocking up, thereby public transport is significant to the guiding urban sustainable development, must greatly develop public transport.
So-called urban public tranlport system roughly comprises bus, light rail or subway.Though wherein light rail or subway embody its vital role already in each metropolitan public transportation system, but, not that each city all has the ability to be implemented in short-term because the investment of subway, light rail is big, engineering difficulty height, the each side problem that faces are also many.And the urban mass-transit system of small investment, instant effect, construction period weak point will be one of optimal selection that improves in short-term urban public transport service level and operational efficiency.Therefore, make the public transportation system of efficient a, comprehensive regulation, allow the public think that subway and bus can replace private car, thus the people who attracts " clan owning cars " or capable buying car subway and bus as first-selected walking-replacing tool.
But existing traffic light control system all is predefined, treats private car and bus fifty-fifty, and this loses the fairness of right of way.For instance, 60 people on bus wait red light such as a red light and a private car obviously unfair.People-oriented in the traffic system in order to embody, fair and just principle, according to the clearance state and the flow situation at current crossing, prolongs the bus transit time, and the requirement that reaches the bus prior-release is more and more stronger.For this reason, seeking a kind of wireless communication technique that passes through, realize the control system or the control method of bus priority pass, is to be engaged in the technician of mechanics of communication applied research when previous important problem direction and goal in research.
Summary of the invention
The objective of the invention is: a kind of bus priority wireless transmission system and control method thereof are provided, solve bus and in crowded urban transportation, also need experience the very long traffic lights stand-by period, the problem of public transport inefficiency, reach the bus priority pass, improve the urban public transport service level.
Technical scheme of the present invention is: a kind of bus priority wireless transmission system, automatically control traffic lights by wireless communication technique to information of vehicles, reach the current effect of public traffic in priority, should comprise the vehicle-mounted module of bus, roadside forwarding module and teleseme module by the entity of wireless channel communication, three generic modules comprise radio-cell and external processing unit separately respectively, and radio-cell is connected by the RS-232 serial ports with external processing unit and is connected, wherein:
The vehicle-mounted module of this bus independently is assemblied on each bus respectively, comprises the first external processing unit of response control and collection vehicle information and receives, handles, preserves and from first radio-cell of radio-frequency head timed sending information of vehicles from RS-232;
This roadside forwarding module is arranged at the front end of each import of intersection respectively, comprise the second external processing unit with timeouts/response and automatic route reception/forwarding capability, receive data and, possess exclusive address information from RS-232 with being used in second radio-cell of radio-frequency head signal transmitting and receiving;
This teleseme module inserts the traffic light control system of each intersection, and with this intersection scope in each roadside forwarding module constitute a crossing LAN (Local Area Network), comprise have that lamp control signal sends, the 3rd external processing unit of timeouts/response function and be used for the 3rd radio-cell that the radio-frequency head signal receives.
Further, aforementioned a kind of bus priority wireless transmission system, wherein the hardware platform of the vehicle-mounted module of this bus, roadside forwarding module and teleseme module is the chip device that is integrated with microprocessor and 2.4GHz wireless transmit/receive units.
Further, aforementioned a kind of bus priority wireless transmission system, wherein the vehicle-mounted block configuration of this bus is useful on three kinds of frequencies of broadcast transmission, and is integrated with the device that is used for the frequency switching and closes the radio frequency reception in the first external processing unit.
Further, aforementioned a kind of bus priority wireless transmission system, wherein this roadside forwarding module comprises: be used for receiving from RS-232 or radio-frequency head and be provided with and the device of echo configuration information, be used for receiving data and the device that sends to RS-232 from the vehicle-mounted module of bus, being used for receiving data and sending to the same generic module of assigned address or directly to the device of teleseme module transmission from RS-232 from radio-frequency head, and receive similar module data and remain untouched and be transmitted to the device of teleseme module.
Further, aforementioned a kind of bus priority wireless transmission system, wherein this teleseme module comprises: be used for from RS-232 or radio-frequency head receive be provided with and the device of echo configuration information, be used for from radio-frequency head accept from the roadside forwarding module data and the device that sends to RS-232, be used for from RS-232 reception data, send to the device of the roadside forwarding module of assigned address, and the lamp control signal dispensing device.
The control method that above-mentioned bus priority wireless transmission system is realized is:
A kind of control method of bus priority wireless transmission system, relate to the vehicle-mounted module of bus, roadside forwarding module and teleseme module by wireless channel communication, three generic modules respectively comprise radio-cell and the external processing unit that is connected by the RS-232 serial ports, and its controlled step is:
I, the vehicle-mounted module of bus independently are assemblied on each bus respectively, a first external processing unit response control or the automatic collection vehicle information, first radio-cell receives information of vehicles treated, that preserve from RS-232, and disposes the broadcast transmission that three kinds of frequencies are carried out information of vehicles;
After II, roadside forwarding module receive broadcast singal, set and start the timeout mechanism of the second external processing unit, and information of vehicles is carried out rough handling in conjunction with self exclusive address information;
III, roadside forwarding module and teleseme module communicate self check by radio-cell separately, and the teleseme module sends a communication waiting signal or do not have feedback to the roadside forwarding module;
IV, after the roadside forwarding module receives communication waiting signal from the teleseme module, send the announcement information that vehicle entered or left the intersection to the teleseme module; After the roadside forwarding module does not receive communication waiting signal from the teleseme module, nationality sends the announcement information that vehicle entered or left the intersection by automatic route forwarding function to the same generic module of assigned address, and according to configuration above announcement information is transmitted to the teleseme module with generic module by this;
V, teleseme module reception notification signal, handle and response public transit vehicle priority pass mechanism, send lamp control signal to traffic light control system, set and start the timeout mechanism of the 3rd external processing unit simultaneously, when the 3rd radio-cell receives after vehicle leaves the intersection or surpass Preset Time, finish and original average waiting mechanism of the signal lamp control system that resumes traffic.
Further, the control method of aforementioned a kind of bus priority wireless transmission system when wherein this first radio-cell carries out the radiofrequency signal broadcast transmission, is closed radio frequency and is received.
Further, the control method of aforementioned a kind of bus priority wireless transmission system, wherein this information of vehicles refers to the id information of bus among the step I, and the roadside forwarding module to the information of vehicles rough handling, obtains the information that ID, travel route, direction of traffic, expectation about bus arrives the time of intersection in conjunction with self exclusive address information in the Step II.
Further, the control method of aforementioned a kind of bus priority wireless transmission system, wherein among Step II I, IV and the V, this teleseme module rejection broadcast message is point-to-point wireless data communications between itself and the roadside forwarding module.
Advantage of the present invention is: in urban public tranlport system, optimized the mechanism of control in the bus driving process in the intersection, shortened the time of bus wait red light, on green time, give the public transit vehicle right-of-way, for being that the people trip of walking-replacing tool provides very big facility with the bus, both solve the problem that improves urban public transport service level and operational efficiency, embodied the fairness in distribution of right of way again.
Description of drawings
Fig. 1 is the corresponding to structural representation of each communication entity module of the present invention;
Fig. 2 is the system chart of bus priority wireless transmission system of the present invention;
Fig. 3 is the circuit diagram of wireless data transfer module of the present invention;
Fig. 4 is the interface synoptic diagram of wireless data transfer module of the present invention and RS-232;
Fig. 5 is the workflow diagram of the vehicle-mounted module of bus of the present invention;
Fig. 6 is the workflow diagram of roadside of the present invention forwarding module.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described:
Embodiment: the workflow diagram of structural representation, system chart, circuit diagram and the control method that constitutes below in conjunction with the present invention, carry out detailed and nonrestrictive description to design core of the present invention.
This bus priority wireless transmission system, automatically control traffic lights by radio frequency communication technology to information of vehicles, reach the effect of bus priority pass, its entity by wireless channel communication comprises the vehicle-mounted module of bus, roadside forwarding module and teleseme module, three generic modules comprise radio-cell and external processing unit separately again respectively, and radio-cell is connected by the RS-232 serial ports with external processing unit and is connected
Clear, succinct for what explain, data to each functional module and radio communication are defined as follows, and all refer to this definition in follow-up description: the vehicle-mounted module of bus is that category-A module, roadside forwarding module are that category-B module, teleseme module are the C generic module.Each can regard a communication terminal as this three generic module, is responsible for realizing the data forwarding and the transmission of RS-232 serial port and wireless network.Be the radio-cell network service port definition of each module ' R ' end in addition, and the RS-232 communication port is defined as ' M ' end.If receive that from ' R ' end or ' M ' termination certain class Frame need handle, then claim such Frame to adapt to ' R ' or ' M ' end; If certain frame data frame can be discerned and handle to certain generic module, then claim this Frame to adapt to certain generic module, can record and narrate and be:
A-represent these several adapt to the category-A module according to frame R end and M hold;
BR-represents that this kind Frame only adapts to the R end of category-B module ... by that analogy.
As shown in Figure 1, be A of the present invention, B, the corresponding to structural representation of C module.For A and category-B module, its first external processing unit and the second external processing unit are control panels; For the C generic module, the 3rd external processing unit is exactly the signal controlling machine of control traffic signal lights.Wherein the category-A module is installed on the motorbus.Periodically at channel 11,12,13 send the data that include this bus id information; The category-B module is arranged at the front end of each import of intersection respectively, receives the radiofrequency signal from the category-A module, and constitutes point-to-point with the C generic module or the automatic routing forwarding of LAN (Local Area Network) is communicated by letter.
The system chart of bus priority wireless transmission system as shown in Figure 2.When being installed in the information that receives the category-A module near the category-B module of intersection, and through the notification message that enter and leave the zone of action of rough handling to C generic module transmission vehicle, the C generic module receives the notification message of category-B module and by its 3rd external (backstage) processing unit traffic lights is controlled, and gives public transit vehicle with right-of-way on green time.
The broadcast message that the category-B module receives the category-A module should be provided with one overtime, when not receiving that at the appointed time broadcast message thinks that then vehicle leaves, send to the C module and leave notice; The C generic module receives after vehicle that the category-B module sends enters notice, also should start a timeout mechanism, but the processing of these timeout mechanisms all finished by external processing unit because this be one with the relevant data processing of concrete application.
The category-B module of certain import at some special crossing may can not directly be communicated by letter with the C generic module owing to the restriction of environmental baseline, but can with another one category-B module communication, the category-B module should be designed to have the function of automatic routing forwarding, and the information of promptly transmitting other B modules transmissions is to the C module.
As shown in Figure 3 and Figure 4, for the circuit diagram of wireless data transfer module of the present invention and with the interface synoptic diagram of RS-232.Wherein external processing unit (MCU unit) is connected by bus with wireless transmit/receive units, the two formation can realize the wireless data transfer module 11 of various functions, in conjunction with shown in Figure 4, a SoC chip MC13213 that is provided by Freescale has been provided present embodiment, the wireless transmit/receive units of this chip is integrated MCU microprocessor unit and 2.4GHz.Be connected by the SPI serial bus between the wireless transmit/receive units of MCU microprocessor unit and 2.4GHz.The MCU microprocessor unit is the processor of one 8 HCS08 kernel, a series of functions such as universal serial port and timing/timer that it is integrated.The Frequency Band Selection of wireless transmit/receive units be the ISM band of 2.4GHz, its Physical layer is that the standard according to IEEE802.15.4 designs, its message transmission rate is 250kbps, this frequency band division is 16 channels, each channel accounts for the bandwidth of 5MHz.Adopt the debud mode of direct sequence spread spectrum (DSSS) and 0-QPSK, improved the antijamming capability of wireless signal.User's main control computer transmits data for the MCU unit of main equipment wireless data transfer module 11 by RS-232 universal serial port communication bus circuit 30, and the MCU unit packages data and gives wireless transmit/receive units again by wireless antenna and match circuit 12 after handling.Each chip pin in the accompanying drawing is summarized as follows:
No. 27 pins and No. 28 pins of SoC chip MC13213 are connected to crystal oscillator OSC4; Its pin number is respectively 44,39,38,36 and 35 pin and then is connected to conventional wireless antenna and match circuit; Its No. 13 pins and No. 12 pins are connected on No. 9 pins and No. 11 pins of corresponding RS-232 interface chip MX3221; Other pin then according to the function of required realization be connected respectively to the watchdog circuit that constitutes by conventional electric capacity, resistance, on draw power supply and ground connection.
Frame format explanation about related in this bus priority wireless transmission system is defined as follows frame type:
SetBusCfgCmd＝1；(AM)
RedBusCfgCmd＝2；(AM)
SetRFCfgCmd＝3；(AM，B，C)
ReadRFCfgCmd＝4；(AM，B，C)
BroadcastBusIdCmd＝5；(AM)
BusPassNotifyCmd＝6；(AR，B)
TransferTableData=7; (B C) transmits data
The concrete form of every kind of Frame:
(1) SetBusCfgCmd frame
Struct SetBusCfgCmdTable {
BYTE SetBusCfgCmd=1; Frame type
BYTE addrSource; The source address of frame is not used
BYTE addrDest; The destination address of frame; Do not use
WORD BusLineNo; The public bus network of 2 bytes number;
WORD BusVehNo; The bus numbering of 2 bytes;
BYTE SendCycle; The transmission cycle; 100 milliseconds of units
BYTE CRC[2]； }
When receiving this frame, the category-A module represents that host computer is provided with parameter.
(2) RedBusCfgCmd frame
BYTE RedBusCfgCmd=2; Frame type
BYTE addrSource; The source address of frame is not used
BYTE addrDest; The destination address of frame; Do not use
BYTE CRC[2]； }
When the category-A module receives this frame, with the current public transport ID configuration data of SetBusCfgCmd frame loopback.
(3) SetRFCfgCmd frame
Struct SetRFCfgCmd?Table {
BYTE SetRFCfgCmd=3; Frame type
BYTE addrSource; The source address of frame is not used
BYTE addrDest; The destination address of frame; Do not use
BYTE localAddress; This module's address;
BYTE GatewayAddress; Gateway address;
BYTE curWorkFrenquence; // work at present frequency numbering.Scope: the setting of 0-2 frequency parameter (definition of module realization side, the category-A module is used three kinds of frequencies, B, the C generic module is selected a kind of from three kinds of frequencies that are provided with.)
BYTE TranceivePowerRate; Emissive power.
BYTE CRC[2]； }
Revise the communication frequency configuration parameter of this module.Category-B module and C generic module must be supported to carry out the setting of running parameter and read from RS-232 serial ports and less radio-frequency port simultaneously.The module of category-B module and C class will be opened from prevention at radio-frequency port and carry out the method that parameter is provided with.
(4) ReadRFCfgCmd frame
Struct?ReadRFCfgCmdTable {
BYTE ReadRFCfgCmd=4; Frame type
BYTE addrSource; The source address of frame is not used
BYTE addrDest; The destination address of frame; Do not use
BYTE CRC[2]； }
Piece and C generic module must be supported to carry out the setting of running parameter and read from 232 serial ports and less radio-frequency port simultaneously.
(5) BroadcastBusIdCmd frame
Have only the RS-232 port of category-A module need handle the type frame, when receiving this frame, the category-A module is with the following BusPassNotifyCmd frame of three kinds of built-in frequency broadcast transmissions.
Struct BroadcastBusIdCmdTable {
BYTE BroadcastBusldCmd=5; Frame type
BYTE addrSource; The source address of frame is not used
BYTE addrDest; The destination address of frame; Do not use
WORD BusLineNo; The public bus network of 2 bytes number;
WORD BusVehNo; The bus numbering of 2 bytes;
BYTE runDirection; The public transport operation direction;
BYTE CRC[2]； }
(6) BusPassNotifyCmd frame
Struct BusPassNotifyCmdTable {
BYTE BusPassNotifyCmd=6; Frame type
BYTE addrSource; The source address of frame,
BYTE addrDest; The destination address of frame;
WORD BusLineNo; The public bus network of 2 bytes number;
WORD BusVehNo; The bus numbering of 2 bytes;
BYTE runDirection; The public transport operation direction;
BYTE CRC[2]； }
This frame of category-A module broadcast transmission when the category-B module receives this frame, sends from the M end.
(7) TransferTableData frame
Struct TransferTableData?Table {
BYTE TransferTableData=7; Frame type
BYTE addrSource; The source address of frame,
BYTE addrDest; The destination address of frame;
BYTE frameData[]；
BYTE CRC[2]； }
This is general data forwarding Frame, is adapted to category-B and C generic module, and generally such frame of receiving from the R termination need send from the M end; Equally, such frame of receiving from the M termination need send from the R end.Difference to category-B and C generic module mainly is different to the processing mode of source address in the form and destination address.
The function of each module and workflow can be summarized as in this bus priority wireless transmission system:
The category-A module
The category-A module only is responsible for the Frame of receiving from the M termination is sent from the R end with fixing cycle and communication frequency, because the data of receiving from the M termination are very simple, it is the id information of bus, can directly be configured to these id informations in the category-A module during specific implementation, only need send these ID data during the module operation gets final product, the category-A module can be closed radio frequency and receive through after being disposed.In order to prevent that the nearer crossing of neighbor distance from disturbing, the configurable three kinds of frequencies of category-A module are carried out the broadcast transmission of id information.
Configuration parameter:
WORD BusLineNo; The public bus network of 2 bytes number;
WORD BusVehNo; The bus numbering of 2 bytes;
BYTE SendCycle; The transmission cycle; 100 milliseconds of units
3 kinds of frequency parameters (definition of module realization side)
BYTE comAddress; Local address.
BYTE TranceivePowerRate; Emissive power.
Communication process:
When receiving configuration messages such as SetBusCfgCmd, RedBusCfgCmd, SetRFCfgCmd, ReadRFCfgCmd from the M termination, respond and handle.
When the M termination is received BroadcastBusIdCmd message, then with three kinds of frequencies from R end emission BusPassNotifyCmd message.
The category-B module
Configuration parameter:
Plant frequency parameter (definition of module realization side) in 3
BYTE comAddress; Local address.
BYTE GatewayAddress; Gateway address.Vehicle notice and Frame forwarding address.
BYTE curWorkFrequence; The work at present frequency
BYTE TranceivePowerRate; Emissive power.
Communication process:
When receiving configuration messages such as SetBusCfgCmd, RedBusCfgCmd, SetRFCfgCmd, ReadRFCfgCmd from the M termination, respond and handle.
When receiving configuration messages such as SetBusCfgCmd, RedBusCfgCmd, SetRFCfgCmd, ReadRFCfgCmd from the R termination, respond and handle.
When the R termination is received the BusPassNotifyCmd frame that the category-A module sends, send from the M port.
When the M termination is received the TransferTableData frame, according to the transmission address of the addrDest territory determination data bag in the TransferTableData frame, if addrDest=0 then is transmitted to gateway to this frame, if addrDes is not 0, then be transmitted to assigned address.
During from TransferTableData frame that the R termination is received, this frame is sent from the M end, if the addrDest address field simultaneously in the frame is not equal to local address, then this frame from the intact gateway that is transmitted to of R end.
The C generic module
Configuration parameter:
3 kinds of frequency parameters (definition of module realization side)
BYTE comAddress; Local address.
BYTE GatewayAddress; Gateway address.Vehicle notice and Frame forwarding address.
BYTE curWorkFrequence; The work at present frequency
BYTE TranceivePowerRate; Emissive power.
Communication process:
When receiving configuration messages such as SetBusCfgCmd, RedBusCfgCmd, SetRFCfgCmd, ReadRFCfgCmd from the M termination, respond and handle.
When receiving configuration messages such as SetBusCfgCmd, RedBusCfgCmd, SetRFCfgCmd, ReadRFCfgCmd from the R termination, respond and handle.
When the R termination is received the BusPassNotifyCmd frame that the category-A module sends, send from the M port.
During from TransferTableData frame that the M termination is received, according to the transmission address of the addrDest territory determination data bag in the TransferTableData frame.
Be used to control the device that traffic lights change.
More than be introduction, then will illustrate the types of functionality module is how to realize its public traffic in priority control in conjunction with Fig. 6 and each generic module workflow diagram shown in Figure 7 to all kinds of intermodule transmission of wireless signals:
As shown in Figure 5 be the workflow diagram of the vehicle-mounted module of bus.This module enters the cycle detection state after initialization, at first detect the serial ports place whether data are arranged, if no datat then inquire about timing device and interrupt situation, if interrupt, then radio-frequency head is at channel 11,12, and 13 distinguish transmit frame bus id informations, whether if do not interrupt, then returning continuation detection serial ports place has data.When detecting the serial ports place and really data arranged, then it is carried out integrity detection, for non-complete situation, then take to abandon this packet, and return and continue to detect the serial ports place whether data are arranged, for the complete situation of packet, according to the difference of bag type, in flash memory, write accordingly and to the module setting, perhaps read designated frame and it is sent from serial ports.
As shown in Figure 6 be the workflow diagram of roadside forwarding module.Among the figure, the workflow of the workflow of roadside forwarding module and the vehicle-mounted module of aforementioned bus is roughly the same, its difference only is after the received complete command frame bag type of serial ports end, to its carry out after the simple process from radio-frequency head send and detection that the radio frequency end data is had or not on, so same section repeats no more.Especially,, radio-frequency head has really and during for complete Frame when detecting, corresponding various situations, and radio-frequency head will have following feedback action:
If the bag type just writes in flash memory and module is provided with for frame is set; If the bag type is that echo is provided with frame, just from flash memory, reads the frame of assigned address, and send from serial ports; If the Frame that the category-A module sends unpacks the back and sends from serial ports; If the Frame that the category-B module sends, directly radio-frequency head is transmitted to other B or C; And if the data that the C module sends unpack the back and send from serial ports.To abandon used data under the various situations after finishing, and return checking again serial data.
Through laboratory simulation: bus priority wireless transmission system that the present invention is designed and control method thereof are applied in the urban public tranlport system, optimized the mechanism of control in the bus driving process in the intersection, shortened the time of bus wait red light, on green time, give the public transit vehicle right-of-way, for being that the people trip of walking-replacing tool provides very big facility with the bus, both solve the problem that improves urban public transport service level and operational efficiency, embodied the fairness in distribution of right of way again.
It should be noted that: to the exemplary detailed introduction of a kind of bus priority wireless transmission system of the present invention and control method thereof.Be intended to deepen understanding to essence of the present invention and beneficial effect; be not to limit its multifarious embodiment and application protection domain with this; therefore simple modification and the equivalence of carrying out for the foregoing description in every case replaced; can realize the technical scheme of the creation purpose identical, all belong within the scope that this patent asks for protection with the present invention.
Claims (9)
1. bus priority wireless transmission system, it is characterized in that: described bus priority wireless transmission system comprises the vehicle-mounted module of bus, roadside forwarding module and teleseme module by the entity of wireless channel communication, three generic modules comprise radio-cell and the external processing unit that is connected by the RS-232 serial ports separately respectively, wherein:
The vehicle-mounted module of described bus independently is assemblied on each bus respectively, comprises the first external processing unit of response control and collection vehicle information and receives, handles, preserves and from first radio-cell of radio-frequency head timed sending information of vehicles from RS-232;
Described roadside forwarding module is arranged at the front end of each import of intersection respectively, comprise the second external processing unit with timeouts/response and automatic route reception/forwarding capability, receive data and, possess exclusive address information from RS-232 with being used in second radio-cell of radio-frequency head signal transmitting and receiving;
Described teleseme module inserts the traffic light control system of each intersection, and with this intersection scope in each roadside forwarding module constitute a crossing LAN (Local Area Network), comprise have that lamp control signal sends, the 3rd external processing unit of timeouts/response function and be used for the 3rd radio-cell that the radio-frequency head signal receives.
2. a kind of bus priority wireless transmission system according to claim 1 is characterized in that: the hardware platform of the vehicle-mounted module of described bus, roadside forwarding module and teleseme module is the chip device that is integrated with microprocessor and 2.4GHz wireless transmit/receive units.
3. a kind of bus priority wireless transmission system according to claim 1, it is characterized in that: the vehicle-mounted block configuration of described bus is useful on three kinds of frequencies of broadcast transmission, and is integrated with the device that is used for the frequency switching and closes the radio frequency reception in the first external processing unit.
4. a kind of bus priority wireless transmission system according to claim 1, it is characterized in that: described roadside forwarding module comprises: be used for receiving from RS-232 or radio-frequency head and be provided with and the device of echo configuration information, be used for receiving data and the device that sends to RS-232 from the vehicle-mounted module of bus, being used for receiving data and sending to the same generic module of assigned address or directly to the device of teleseme module transmission from RS-232 from radio-frequency head, and receive similar module data and remain untouched and be transmitted to the device of teleseme module.
5. a kind of bus priority wireless transmission system according to claim 1, it is characterized in that: described teleseme module comprises: be used for from RS-232 or radio-frequency head receive be provided with and the device of echo configuration information, be used for from radio-frequency head accept from the roadside forwarding module data and the device that sends to RS-232, be used for from RS-232 reception data, send to the device of the roadside forwarding module of assigned address, and the lamp control signal dispensing device.
6. the control method of a bus priority wireless transmission system, it is characterized in that: described control method relates to the vehicle-mounted module of bus, roadside forwarding module and the teleseme module by wireless channel communication, three generic modules comprise radio-cell and the external processing unit that is connected by the RS-232 serial ports separately, and its controlled step is:
I, the vehicle-mounted module of bus independently are assemblied on each bus respectively, directly the configuration information of vehicles is to this module or by the first external processing unit input, first radio-cell receives information of vehicles treated, that preserve from RS-232, and disposes the broadcast transmission that three kinds of frequencies are carried out information of vehicles;
After II, roadside forwarding module receive broadcast singal, set and start the timeout mechanism of the second external processing unit, and information of vehicles is carried out rough handling in conjunction with self exclusive address information;
III, roadside forwarding module and teleseme module communicate self check by radio-cell separately, and the teleseme module sends a communication waiting signal or do not have feedback to the roadside forwarding module;
IV, after the roadside forwarding module receives communication waiting signal from the teleseme module, send the announcement information that vehicle entered or left the intersection to the teleseme module; After the roadside forwarding module does not receive communication waiting signal from the teleseme module, nationality sends the announcement information that vehicle entered or left the intersection by automatic route forwarding function to the same generic module of assigned address, and according to configuration above announcement information is transmitted to the teleseme module with generic module by this;
V, teleseme module reception notification signal, handle and response public transit vehicle priority pass mechanism, send lamp control signal to traffic light control system, set and start the timeout mechanism of the 3rd external processing unit simultaneously, when the 3rd radio-cell receives after vehicle leaves the intersection or surpass Preset Time, finish and original average waiting mechanism of the signal lamp control system that resumes traffic.
7. the control method of a kind of bus priority wireless transmission system according to claim 6 is characterized in that: when first radio-cell carries out the radiofrequency signal broadcast transmission described in the step I, close radio frequency and receive.
8. the control method of a kind of bus priority wireless transmission system according to claim 6, it is characterized in that: information of vehicles described in the step I refers to the id information of bus, and the roadside forwarding module to the information of vehicles rough handling, obtains the information that ID, travel route, direction of traffic, expectation about bus arrives the time of intersection in conjunction with self exclusive address information in the Step II.
9. the control method of a kind of bus priority wireless transmission system according to claim 6 is characterized in that: among Step II I, IV and the V, described teleseme module rejection broadcast message is point-to-point wireless data communications between itself and the roadside forwarding module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910115587XA CN101599218B (en) | 2009-06-22 | 2009-06-22 | Bus priority wireless transmission system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910115587XA CN101599218B (en) | 2009-06-22 | 2009-06-22 | Bus priority wireless transmission system and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101599218A true CN101599218A (en) | 2009-12-09 |
| CN101599218B CN101599218B (en) | 2011-01-05 |
Family
ID=41420647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910115587XA Expired - Fee Related CN101599218B (en) | 2009-06-22 | 2009-06-22 | Bus priority wireless transmission system and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101599218B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436752A (en) * | 2011-09-29 | 2012-05-02 | 青岛海信网络科技股份有限公司 | Prior control system and method for road signals |
| WO2012163153A1 (en) * | 2011-06-01 | 2012-12-06 | 电信科学技术研究院 | Traffic light control method, device and system |
| CN107589925A (en) * | 2016-07-07 | 2018-01-16 | 弘真科技股份有限公司 | Has the wireless image-sound transmission method of honored guest's mechanism |
| CN107886743A (en) * | 2016-09-30 | 2018-04-06 | 西门子（中国）有限公司 | Adjust the system, apparatus and method of traffic signals |
| CN114973706A (en) * | 2021-02-26 | 2022-08-30 | 长沙智能驾驶研究院有限公司 | Vehicle-road cooperative communication method and device, traffic signal control equipment and road side equipment |
-
2009
- 2009-06-22 CN CN200910115587XA patent/CN101599218B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012163153A1 (en) * | 2011-06-01 | 2012-12-06 | 电信科学技术研究院 | Traffic light control method, device and system |
| CN102436752A (en) * | 2011-09-29 | 2012-05-02 | 青岛海信网络科技股份有限公司 | Prior control system and method for road signals |
| CN107589925A (en) * | 2016-07-07 | 2018-01-16 | 弘真科技股份有限公司 | Has the wireless image-sound transmission method of honored guest's mechanism |
| CN107886743A (en) * | 2016-09-30 | 2018-04-06 | 西门子（中国）有限公司 | Adjust the system, apparatus and method of traffic signals |
| CN114973706A (en) * | 2021-02-26 | 2022-08-30 | 长沙智能驾驶研究院有限公司 | Vehicle-road cooperative communication method and device, traffic signal control equipment and road side equipment |
| CN114973706B (en) * | 2021-02-26 | 2023-09-22 | 长沙智能驾驶研究院有限公司 | Vehicle-road cooperative communication method and device, traffic signal control equipment and road side equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101599218B (en) | 2011-01-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101599218B (en) | Bus priority wireless transmission system and control method thereof | |
| CN209072467U (en) | A kind of bus or train route collaboration OBU equipment based on multi-mode communication | |
| CN102646338B (en) | Priority control method for bus signal based on green light demand | |
| CN102306451B (en) | Traffic light control method, device and system | |
| CA2749710C (en) | Method and onboard unit for radio communication in a road toll system | |
| CN104134365B (en) | Traffic intersection information release terminal | |
| CN106971579A (en) | The trackside operational support system and method for a kind of intelligent network connection automobile | |
| CN105070076A (en) | Method and system for planning special route of special vehicle based on V2I (Vehicle to Infrastructure) | |
| US20130065530A1 (en) | Switching device for car-to-x communication and communication device | |
| CN107591008A (en) | A kind of distributed traffic control system based on roadside device | |
| CN101819685A (en) | ETC electronic tag device and method for realizing path information submission | |
| CN101141413A (en) | Public transport information acquisition and information transmission method and implementing system thereof | |
| CN203773749U (en) | Intelligent public transportation information system based on RFID | |
| CN103078686A (en) | Method, system and device for reducing adjacent-channel interference in electronic tollof collection (ETC) system | |
| CN107909853A (en) | Support visible light communication (VLC) intelligent transportation system of bilateral positioning | |
| Koenders et al. | Cooperative infrastructure | |
| CN114120460A (en) | Intelligent vehicle-mounted terminal OBU integrating ETC and V2X functions and application | |
| KR100869710B1 (en) | Network interface device for intelligent transport system | |
| KR100709273B1 (en) | On-Board Unit with smart card interface and RFID tag and Road Side Unit communicationable with that | |
| CN106991728A (en) | LED visible light communication ETC system | |
| CN202523116U (en) | Non-stop expressway running path recording system based on mobile network | |
| CN101826255B (en) | Simple system of bus rapid transit | |
| CN106652502B (en) | Turn left to keep straight on and shares the bus left-hand rotation regulator control system and method for signal lamp crossroad | |
| CN109272761A (en) | A kind of road intersection method for managing security and its system | |
| CN209087143U (en) | A kind of intelligent traffic light node control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110105 Termination date: 20200622 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |