CN101123006A - ETC system roadside unit based on WLAN and charging method - Google Patents
ETC system roadside unit based on WLAN and charging method Download PDFInfo
- Publication number
- CN101123006A CN101123006A CNA2006100892165A CN200610089216A CN101123006A CN 101123006 A CN101123006 A CN 101123006A CN A2006100892165 A CNA2006100892165 A CN A2006100892165A CN 200610089216 A CN200610089216 A CN 200610089216A CN 101123006 A CN101123006 A CN 101123006A
- Authority
- CN
- China
- Prior art keywords
- unit
- processing unit
- data
- roadside
- vehicle
- 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
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000012545 processing Methods 0.000 claims abstract description 201
- 230000006854 communication Effects 0.000 claims abstract description 31
- 238000004891 communication Methods 0.000 claims abstract description 30
- 230000008569 process Effects 0.000 claims description 30
- 238000006243 chemical reaction Methods 0.000 claims description 27
- 230000005540 biological transmission Effects 0.000 claims description 19
- 238000013500 data storage Methods 0.000 claims description 15
- 210000000352 storage cell Anatomy 0.000 claims description 15
- 230000010363 phase shift Effects 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 6
- 102100038591 Endothelial cell-selective adhesion molecule Human genes 0.000 claims description 5
- 101000882622 Homo sapiens Endothelial cell-selective adhesion molecule Proteins 0.000 claims description 5
- 210000004027 cell Anatomy 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 230000004044 response Effects 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 4
- 238000012795 verification Methods 0.000 claims description 3
- 101100172132 Mus musculus Eif3a gene Proteins 0.000 claims description 2
- 230000006870 function Effects 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 description 20
- 230000003993 interaction Effects 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 4
- 239000002585 base Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000005059 dormancy Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012163 sequencing technique Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000003637 basic solution Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Landscapes
- Devices For Checking Fares Or Tickets At Control Points (AREA)
- Traffic Control Systems (AREA)
Abstract
The invention discloses a WLAN-based ETC system roadside unit and a toll method, which solve the problem of present roadside units that the units can not be used for processing user and vehicle data information in an ETC system, so that the cost of the ETC system is high. The unit comprises a wireless access point, a wireless netcard and a data processing unit. The wireless access point is used for communication with an onboard unit and receiving vehicle and user data transmitted from the onboard unit; the wireless netcard is used for processing the vehicle and user data received from the wireless access point; and the data processing unit is used for verifying the vehicle and user data and carrying out corresponding transactions. The roadside unit in the invention is characterized by high mobility of supporting mobile terminals, supporting multi-user and multi-address communication, supporting remoter communication, high efficiency and high communication transaction success rate. The data processing unit in the invention realizes verifying and processing functions of present toll and balancing centers, reduces corresponding investments to toll and balancing centers, and saves a large amount of human power and resources.
Description
Technical field:
The present invention relates to a kind of roadside unit (RSU) that is applied in highway or the urban road electronic charging system without parking (ETC), relate in particular to a kind of roadside unit of the electronic charging system without parking of realizing based on the wireless lan (wlan) technology, also relate to the method that realizes this roadside unit simultaneously.The invention belongs to intelligent transportation (being called for short ITS) technical field.
Background technology:
Along with China's rapid development of economy, the contradiction of ever-increasing automobile pollution and limited path area becomes increasingly conspicuous.In order to solve this contradiction, except building energetically the road, the utilization ratio that improves existing road also is an important ring.Under this background, intelligent transportation system becomes the focus of world today's research and development day by day.
Electronic charging system without parking (ETC) and technology thereof are the important component parts of intelligent transportation system, and it is the important technical that solves traffic congestion on the toll road, obstruction and other drawback, improves existing road security of operation and efficient.Roadside unit (RSU) is as the important component part of ETC system, and the normal operation of whole ETC system and the reliable assurance of performance are played crucial effects.Roadside unit be installed in highway or urban road directly over, height 3.5m ~ 5.5m, by communicating with the board units (OBU) of exercising the vehicle front windshield inboard on highway or urban road, realize carrying out non-parking charge for the vehicle that travels on highway or urban road, thereby allow vehicle to pass through at a high speed, improve the traffic capacity of highway or urban road greatly.
The realization technology that roadside unit in the at present existing ETC system adopts is the REID (RFID) based on the 5.8GHz frequency range, roadside unit is a radiofrequency signal R-T unit, promptly be equivalent to a card reader, be used for reading the user and the vehicle data information of the vehicle electronics label of the passive or low-power consumption on the vehicle, send calculation control center, backstage then to, treat that calculation control center, backstage sends it back data the vehicle electronics label after having settled accounts again.Obviously this roadside unit only plays the effect of receiving and transmitting signal in existing ETC system, do not have the user that handles in the ETC system and the function of vehicle data information, so just require that must there be very strong processing data information ability at calculation control center in backstage in the ETC system, thereby increased the cost of ETC system greatly.And owing to be and the label communication of passive or low-power consumption, so the signal energy of roadside unit emission also is very faint, this just exists the very poor weakness of antijamming capability, and the communication transaction success ratio of roadside unit and board units only is 80% at present.In addition, the vehicle pass-through speed that roadside unit is supported in the ETC system is also only about 30km/h at present, communication distance is 10m, and this vehicle pass-through speed and communication distance obviously are unacceptable for the current pressure of alleviating highway or urban road free flow vehicle.Simultaneously, aspect the rate of information throughput, the rate of information throughput that the roadside unit of the ETC system of existing REID (RFID) based on the 5.8GHz frequency range is supported all has only 500kbps on the uplink and downlink link, the data that this contains much information for transmission picture etc. and a plurality of board units obviously are not enough simultaneously and the roadside unit situation that communicates and conclude the business.Add the roadside unit of the ETC system that builds existing REID (RFID) based on the 5.8GHz frequency range and need on road, bury a large amount of telefaults underground, thereby bring the very complicated in the construction and the factors such as reduction of communication reliability, make existing ETC system roadside unit can't satisfy of the requirement of user's vehicle at all passage rate (reaching 100km/h), communication quality (the Transaction Success rate is more than 99%) and communication validity (can realize the transmission of the data that picture etc. contains much information).
The communication distance that not only can the support unit passage rate reaches 180km/h, board units and roadside unit based on the ETC system roadside unit of WLAN that the present invention proposes can reach 180m, the rate of information throughput reaches 6Mbps, communication transaction success ratio more than 99% at the uplink and downlink link, such performance index are very desirable for the current problem that solves highway or urban road free flow vehicle; And this also have the great ability of process user vehicle data information and Transaction Information based on the ETC system roadside unit of WLAN.This shows, no matter from the performance index that realize still from the power that itself is had, comparing with the roadside unit of the ETC system of existing REID based on the 5.8GHz frequency range (RFID), should all be very advantageous and practicable based on ETC system roadside unit of WLAN.
On the other hand, along with the develop rapidly of the communication technology, the wireless lan (wlan) technology is grown up gradually.WLAN is meant the LAN (Local Area Network) that adopts wireless medium transmissions, and accepted standard is an IEEE 802.11a/b/g series.WLAN can in, in the scope of short distance, for moving or semimobile user provides efficiently, high-quality, broadband inserting service cheaply.Compare with REID, the WLAN technology has installs simple, construction period weak point, the outstanding advantage that cost is low.But the WLAN (wireless local area network) that the WLAN technology is mainly used in 50m～100m scope is interconnected, and the network terminal all is in the state that static or low speed moves (5km/h is following).And in the ETC system, the motion of mobile terminals speed that requires the roadside unit support is generally all more than 30km/h.Therefore, the WLAN technology is generally believed and is not suitable for being used in the ETC system roadside unit.Do not adopt the WLAN technology to carry out precedent with the board units radio communication in the existing ETC system roadside unit.
Summary of the invention:
Defective and deficiency at prior art exists the invention provides a kind of cost is low, be convenient to toll administration ETC system roadside unit and charging method thereof based on WLAN.
For realizing above-mentioned goal of the invention, the present invention adopts following technical scheme:
A kind of ETC system roadside unit based on WLAN comprises: a WAP, be used in WLAN (wireless local area network), establishing a communications link with board units, and receive vehicle and user data that board units sends; One wireless network card is used to handle vehicle and a user data and the data processing unit that described WAP receives, and is used to examine described vehicle and user data; According to the verification result processing of charging.
Preferably: in described ETC system roadside unit, comprise that also one is used to limit the WAP signal cover based on WLAN, and the directional antenna that links to each other with WAP.
Preferably: in described ETC system roadside unit based on WLAN, described wireless network card comprises:
One air feedback unit is used for sending or receiving data information;
One RF processing unit is used for data are carried out frequency-conversion processing;
One baseband processing unit is used for data are carried out analog to digital conversion, demodulation, despreading processing; And
One mac-layer protocol processing unit, be used for to data message decode, decapsulation handles;
Described air feedback unit is connected with RF processing unit, this air feedback unit sends the data message that receives to RF processing unit, carrying out low noise amplifies and the intermediate frequency frequency-conversion processing, described RF processing unit is connected with baseband processing unit, the data message of baseband processing unit after to frequency-conversion processing carries out analog to digital conversion, after becoming digital signal, carry out despreading and demodulation process; Described baseband processing unit is connected with the mac-layer protocol processing unit, and the mac-layer protocol processing unit is to the data message processing of unpacking of decoding, and decapsulation is also removed packet header, restores primary data information (pdi), sends data processing unit then to.
Preferably: in described ETC system roadside unit based on WLAN, described data processing unit comprises: data storage cell is used for storage and waits to examine vehicle and user data; And CPU (central processing unit), be used to examine vehicle that board units sends and user data and described cell stores wait examine vehicle and whether user data identical, and handle accordingly.
Preferably: in described ETC system roadside unit based on WLAN, described data processing unit comprises that also one captures the unit, be used for all vehicles that real-time grasp shoot enters the roadside unit working range, and the information of vehicles of being captured discerned send described data storage cell then to.
Preferably: in described ETC system roadside unit based on WLAN, described data processing unit also comprises a transaction interface unit, be used to connect described CPU (central processing unit) and backstage financial transaction processing enter, transmit the pay imformation of traffick to backstage financial transaction processing enter.
Preferably: in described ETC system roadside unit based on WLAN, described roadside unit utilizes WLAN standard agreement and board units to communicate.
Preferably: in described ETC system roadside unit based on WLAN, described protocol of wireless local area network includes but not limited to the IEEE802.11 agreement.
Preferably: in described ETC system roadside unit, also comprise power supply unit, be used to roadside unit to provide operation necessary energy based on WLAN.
Preferably: in described ETC system roadside unit, also comprise the auxiliary unit that is connected with described CPU (central processing unit) based on WLAN.
Described auxiliary unit can be the combination in any of following unit: embedded-type security security module, power light, status indicator lamp, traffic warning light control module, railing control module, roadside intercom system control module, resetting system, cooling system, wired connection interface unit, burglary-resisting system or man-machine interface automatically.
Preferably: in described ETC system roadside unit based on WLAN,
Described embedded-type security security module (ESAM) is used to the charge transaction data information in this roadside unit that safe and secret mechanism is provided.
Described power light is used to show the On/Off state of roadside unit.
Described status indicator lamp is used to show the work/dormancy/abnormality of roadside unit.
Described traffic warning light control module is used for and CPU (central processing unit) (CPU) interaction data information, controls the traffic warning light according to the data message that obtains then, and whether the vehicle of exercising with prompting Transaction Success.If i.e. Transaction Success, then traffic warning light control module control traffic warning light shows green light, otherwise, show red light.
Described automatic railing control module is used for and CPU (central processing unit) (CPU) interaction data information, controls automatic railing according to the data message that obtains then, to realize to the clearance of Transaction Success vehicle with to the interception of the unsuccessful vehicle of concluding the business.
Described roadside intercom system control module is used for and CPU (central processing unit) (CPU) interaction data information, control the roadside intercom system according to the data message that obtains then, make it demonstrate the transaction situation of each traffick, promptly on the large display screen of roadside intercom system, demonstrate the transaction situation of all trafficks that are arranged in order by the time sequencing of capturing identification, large display screen is a black, the video data information of Transaction Success vehicle is yellow, and the video data information of Fail Transaction vehicle is red.
Described resetting system is used for by CPU (central processing unit) (CPU) it being controlled when roadside unit is powered again and starts, and makes it restart adjustment to WAP.
Described cooling system is used for CPU (central processing unit) is carried out heat sinking function, uses small-sized fans or silica gel radiating fin.
Described wired connection interface unit is used for the function expansion of roadside unit, can form the LAN (Local Area Network) of expansion or insert PAN, LAN, WAN.
Described burglary-resisting system is used to prevent that roadside unit from being moved usurps.
Described man-machine interface is used for artificially controlling the switch of roadside unit, promptly when using roadside unit, utilizes man-machine interface that roadside unit is opened, when roadside unit takes place to utilize man-machine interface that roadside unit is closed when unusual.
Preferably: in described ETC system roadside unit based on WLAN, described WAP contains the beacon adjustment module, is used to set beacon and sends the cycle, makes the per 20 milliseconds of transmissions of beacon once.
A kind of method that realizes electric non-stop toll comprises the steps:
Steps A, roadside unit and board units establish a communications link in WLAN (wireless local area network);
Step B, wireless network card receives vehicle and the user data information that board units sends;
Step C, data processing unit receive described vehicle and user data information, it are examined, according to the verification result processing of charging.
Preferably: in the method for described realization electric non-stop toll, described steps A is specially: the directional antenna of roadside unit front end receives the frame of inquiring after from board units (OBU), be transferred to WAP then, WAP returns a response frame and is transferred to board units to set up communicating to connect of board units and roadside unit by directional antenna.
Preferably: in the method for described realization electric non-stop toll, described step B is specially:
Step B1, WAP receives vehicle and the user data information that board units sends by directional antenna, and is transferred to the air feedback unit of roadside unit;
Step B2, air feedback unit sends the data message that receives to RF processing unit, and data message carries out low noise at RF processing unit and amplifies and frequency-conversion processing, sends baseband processing unit afterwards to;
Step B3, baseband processing unit carries out mould/transformation of variables to data message, converts digital signal to, carries out despreading and demodulation process then, data message is sent to the mac-layer protocol processing unit again;
Step B4, at the mac-layer protocol processing unit, to the data message processing of unpacking of decoding, decapsulation is also removed packet header, restores primary data information (pdi), and then sends CPU (central processing unit) to.
Preferably: in the method for described realization electric non-stop toll, described step C is specially:
Step C1, CPU (central processing unit) is sent to data storage cell with the user's vehicle data information that receives;
Step C2, data storage cell is compared vehicle data information that obtains from capture and identification system and the vehicle data information of coming from the CPU (central processing unit) transmission;
Step C3, if the result of comparison is correct, then embedded-type security security module (ESAM) will provide safe and secret mechanism to data message, by CPU (central processing unit) data message be passed through the transaction interface unit then, send backstage financial transaction processing enter to, settle accounts to adjust and handle;
Step C4, the data message after roadside unit will be handled sends board units to by directional antenna.
Preferably: in the method for described realization electric non-stop toll, also comprise:
Step D, if the erroneous results of comparison, then roadside unit is with the data message of user's vehicle, together with the erroneous results information of comparison, together board units is given in passback.
Preferably: in the method for described realization electric non-stop toll, communicate by protocol of wireless local area network between described roadside unit and the board units.
Preferably: in the method for described realization electric non-stop toll, described protocol of wireless local area network includes but not limited to the IEEE802.11 agreement.
Preferably: in the method for described realization electric non-stop toll, in the process that described roadside unit and board units communicate, the modulation system that adopts OFDM to combine to baseband signal with binary phase shift keying.
Preferably: in the method for described realization electric non-stop toll, in the process that described roadside unit and board units communicate, the MAC layer communicates based on csma/collision avoidance protocol.
Preferably: in the method for described realization electric non-stop toll, be meant in frequency-conversion processing described in the step B2 signal frequency is converted to the intermediate frequency frequency range from 5.8GHz.
ETC system roadside unit based on WLAN provided by the present invention adopts the multiple technologies means, effectively overcome the technology prejudice that the WLAN technology is not suitable for the ETC system roadside unit.Compare with the existing ETC system roadside unit that adopts radio frequency to set technology, roadside unit of the present invention has the high-speed mobile (max. speed can reach 180km/h) of supporting portable terminal, support more users multiple access communications (can insert 60 user's vehicles simultaneously), support that (rate of information throughput can reach 6Mbps for more telecommunication (more than the 180m) and high-level efficiency, be higher than far away and adopt radio frequency to set the rate of information throughput of 500kpbs of the ETC system roadside unit of technology, and high workload efficient), high communication Transaction Success rate (99%), complete function, the characteristics that performance index are good, the great ability that should have in particular, process user vehicle data information and Transaction Information based on the ETC system roadside unit of WLAN.Therefore, no matter realize still technical performance index from function on, for the ETC system roadside unit apply and technical progress of industry is extremely important.Simultaneously, data processing unit of the present invention has realized that existing charge settlement center examines processing capacity, can reduce the investment to charge settlement center accordingly, has saved lot of manpower and material resources.
Description of drawings:
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is the structural representation of basic roadside unit RSU.
Fig. 2 is the structural representation of complete roadside unit RSU.
Fig. 3 is the signal Processing fundamental diagram of wireless network card among the roadside unit RSU of the present invention.
Fig. 4 is the workflow diagram of the younger generation's of the present invention roadside unit RSU.
Embodiment:
The effect of roadside unit (RSU) is to set up WLAN (wireless local area network), and sends and receive related data information, then finishes whole charge process of exchange so that its board units (OBU) interior with entering this WLAN (wireless local area network) scope establishes a communications link.Particularly, at first, roadside unit (RSU) is in running order all the time, and the WAP of roadside unit front end (AP) is constantly intercepted the frame of inquiring after that has or not the board units transmission in the WLAN (wireless local area network), in a single day AP detects and receives the frame of inquiring after from the board units transmission, just send the control response frame immediately, thereby successfully establish a communications link with board units; Secondly, after successfully establishing a communications link, AP receives user's vehicle data information that board units sends by the directional antenna of its front end, and sends the wireless network card of this data message by roadside unit to CPU (central processing unit) (CPU).
In the present invention, the roadside unit that uses in roadside unit and the existing ETC system is very inequality.The roadside unit that existing ETC system uses only is the R-T unit of a radiofrequency signal, be equivalent to a card reader, be used for reading the user and the vehicle data information of the vehicle electronics label of the passive or low-power consumption on the vehicle, the ability that does not have process user vehicle data information and Transaction Information, the processing of all data messages and process of exchange all need the very powerful calculation control center, backstage of function to finish.
With reference to accompanying drawing 1, the roadside unit among the present invention comprises necessary elementary cell:
One WAP (AP) is used for establishing a communications link with board units in WLAN (wireless local area network), receives vehicle and user data that board units sends;
One directed antenna is used to limit the WAP signal cover, and is connected with WAP;
One air feedback unit (built-in omnidirectional antenna) is used for sending or receiving data information, is connected with WAP;
One RF processing unit is used for data are carried out frequency-conversion processing;
One baseband processing unit is used for data are carried out analog to digital conversion, demodulation, despreading processing; And
One mac-layer protocol processing unit, be used for to data message decode, decapsulation handles;
Described air feedback unit is connected with RF processing unit, this air feedback unit sends the data message that receives to RF processing unit, carrying out low noise amplifies and the intermediate frequency frequency-conversion processing, described RF processing unit is connected with baseband processing unit, the data message of baseband processing unit after to frequency-conversion processing carries out analog to digital conversion, after becoming digital signal, carry out despreading and demodulation process; Described baseband processing unit is connected with the mac-layer protocol processing unit, and the mac-layer protocol processing unit is to the data message processing of unpacking of decoding, and decapsulation is also removed packet header, restores primary data information (pdi), sends CPU (central processing unit) (CPU) then to.
One CPU (central processing unit) (CPU), be used to examine vehicle that board units sends and user data and described cell stores wait examine vehicle and whether user data identical;
One data storage cell that is connected with CPU (central processing unit) is used for storage and waits to examine vehicle and user data;
The one candid photograph recognition unit that is connected with data storage cell is used for all vehicles that real-time grasp shoot enters the roadside unit working range, and the information of vehicles of being captured discerned sends described data storage cell then to;
The one transaction interface unit that is connected with CPU (central processing unit) is used to connect described CPU (central processing unit) and backstage financial transaction processing enter, to realize the non-parking charge to traffick.
With reference to accompanying drawing 2, and optional auxiliary unit:
The one embedded-type security security module that is connected with CPU (central processing unit) is used to the charge transaction data information in this roadside unit that safe and secret mechanism is provided;
One power light that is connected with CPU (central processing unit) is used to show the On/Off state of roadside unit;
One status indicator lamp that is connected with CPU (central processing unit) is used to show the work/dormancy/abnormality of roadside unit;
The one traffic warning light control module that is connected with CPU (central processing unit) is used for and CPU (central processing unit) (CPU) interaction data information, controls the traffic warning light according to the data message that obtains then, and whether the vehicle of exercising with prompting Transaction Success.If i.e. Transaction Success, then traffic warning light control module control traffic warning light shows green light, otherwise, show red light;
The one automatic railing control module that is connected with CPU (central processing unit), be used for and CPU (central processing unit) (CPU) interaction data information, control automatic railing according to the data message that obtains then, to realize to the clearance of Transaction Success vehicle with to the interception of the unsuccessful vehicle of concluding the business;
The one roadside intercom system control module that is connected with CPU (central processing unit), be used for and CPU (central processing unit) (CPU) interaction data information, control the roadside intercom system according to the data message that obtains then, make it demonstrate the transaction situation of each traffick, promptly on the large display screen of roadside intercom system, demonstrate the transaction situation of all trafficks that are arranged in order by the time sequencing of capturing identification, large display screen is a black, the video data information of Transaction Success vehicle is yellow, and the video data information of Fail Transaction vehicle is red;
One resetting system that is connected with CPU (central processing unit) is used for by CPU (central processing unit) (CPU) it being controlled when roadside unit is powered again and starts, and makes it restart adjustment to WAP;
One cooling system that is connected with CPU (central processing unit) is used for CPU (central processing unit) is carried out heat sinking function, uses small-sized fans or silica gel radiating fin;
The one wired connection interface unit that is connected with CPU (central processing unit) is used for the function expansion of roadside unit, can form the LAN (Local Area Network) of expansion or insert PAN, LAN, WAN;
One burglary-resisting system that is connected with CPU (central processing unit) is used to prevent that roadside unit from being moved usurps;
One man-machine interface that is connected with power supply unit is used for artificially controlling the switch of roadside unit, promptly when using roadside unit, utilizes man-machine interface that roadside unit is opened, when roadside unit takes place to utilize man-machine interface that roadside unit is closed when unusual.
The present invention has the power of process user vehicle data information and Transaction Information, thereby has simplified the sophisticated functions at calculation control center, backstage greatly, makes it change in quality into a financial transaction processing enter, only finishes the function of withholing and clearing.
The principle of work of complete roadside unit of the present invention is as follows: the first, open man-machine interface, and the energized unit allows roadside unit enter the startup duty; The second, after man-machine interface was opened, CPU (central processing unit) (CPU) drove resetting system, it is resetted to WAP (AP) adjust setting; The 3rd, the directional antenna of WAP by its front end communicates with board units and is connected, and receives the user's vehicle data information from board units after the successful connection, and gives wireless network card in the roadside unit with these data information transfer; The 4th, wireless network card carries out corresponding signal to user's vehicle data information to be handled, and the data message after will handling then sends CPU (central processing unit) (CPU) to; The 5th, CPU (central processing unit) is sent to data storage cell with the user's vehicle data information that receives, data storage cell is compared vehicle data information that obtains from capture and identification system and the vehicle data information of coming from the CPU (central processing unit) transmission, and the result that will compare together returns to CPU (central processing unit) together with user and vehicle data information.If the result of comparison is correct, then embedded-type security security module (ESAM) will provide safe and secret mechanism to data message, send data message to backstage financial transaction processing enter by the transaction interface unit by CPU (central processing unit) then and settle accounts the accounting processing.Data message after the financial transaction processing enter is handled sends board units (OBU) to via directional antenna at last according to the reverse transmission of said process.If the erroneous results of comparison, then CPU (central processing unit) together returns the data message of user's vehicle to board units (OBU) by directional antenna through reverse transmission course together with the erroneous results information of comparing.Thereby finish whole process of exchange.
The process of described roadside unit wireless network card process user vehicle data information is as follows: first, the directional antenna of roadside unit front end receives the frame of inquiring after from board units (OBU), be transferred to AP then, AP returns a control response frame and is transferred to board units to set up communicating to connect of roadside unit and board units by directional antenna, second, after communicating to connect successfully, AP receives vehicle and the user data information that board units sends by directional antenna, and be transferred to the air feedback unit of roadside unit, the 3rd, air feedback unit sends the data message that receives to RF processing unit, data message carries out low noise at RF processing unit and amplifies and the intermediate frequency frequency-conversion processing, transmits signals to baseband processing unit afterwards; The 4th, baseband processing unit carries out mould/transformation of variables to data message, converts digital signal to, carries out despreading and demodulation process then, promptly separate and remove the OFDM spread processing and separate and remove the binary phase shift keying modulation treatment, again data message is sent to the mac-layer protocol processing unit; The 5th, at the mac-layer protocol processing unit, to the data message processing of unpacking of decoding, decapsulation is also removed packet header, restores primary data information (pdi), and then sends CPU (central processing unit) (CPU) to.
Fig. 3 is the signal Processing fundamental diagram of wireless network card among the roadside unit RSU of the present invention.As shown in the figure, in the radiofrequency signal processing section, air feedback unit receives the radiofrequency signal that WAP (AP) sends, and after bandpass filter (BPF) and low noise amplifier (LNA) processing, inserts a frequency mixer; On the other hand, the oscillator signal that crystal oscillator produces inserts this frequency mixer after compositor, mixed signal is through inserting a four-tuple intermediate frequency regulator after another BPF, and other one road oscillator signal that crystal oscillator produces is also through inserting this four-tuple intermediate frequency regulator after the compositor, four-tuple intermediate frequency regulator carries out the intermediate frequency frequency-conversion processing by back one road signal to last road signal, more than is exactly the signal processing of radiofrequency signal processing section.In the base band signal process part, above-mentioned radiofrequency signal is at first carried out analog to digital conversion, signal is changed into digital signal, separate then and extend to demodulation process, promptly removing OFDM (OFDM) spread processing and remove binary phase shift keying (BPSK) modulation treatment, more than is the signal processing of base band signal process part.In the mac-layer protocol processing section, the mac-layer protocol processing unit is to the data message processing of unpacking of decoding, and decapsulation is also removed packet header, restores primary data information (pdi), and then sends CPU (central processing unit) (CPU) to.
Concrete composition and principle of work to the ETC system roadside unit based on WLAN of the present invention has been described in detail above.Be presented in a major technology difficult problem and corresponding solution when being applied to the WLAN technology under the low speed mobile environment of being suitable in the ETC system roadside unit below more in detail.
At present, the WLAN technology is very ripe, and relevant technical standard is extensively approved.It mainly is the wireless access occasion at indoor WLAN (wireless local area network) and outdoor low speed (less than 10km/h) portable terminal, can provide message transmission rate to reach the above high-speed communication of 11Mbps, but it does not support high-speed mobile.Therefore, at open air high speed (being higher than 10km/h) mobile terminal, provide wireless access to be considered to unaccommodated by the WLAN technology.At this problem, basic solution thinking of the present invention be in view of the ETC system roadside unit be not very high (being lower than 1Mbps) to the requirement of message transmission rate, therefore, can be the interests that cost exchanges reliability, operating distance, cost aspect for to sacrifice communication validity.
Particularly, relevant improvement embodies in the following areas.
1. in the communication process of roadside unit (RSU) and board units (OBU), the band spectrum modulation mode that adopts OFDM (OFDM) and binary phase shift keying (BPSK) to combine
In the ETC system roadside unit, be to guarantee the proper communication of signal, all most important for the processing of the processing of baseband chip and mac-layer protocol module and radio frequency chip.Because the basic module of original WLAN chip is integrated, need carry out local improvement to it when therefore being applied to the ETC system roadside unit, adopt new coded system, adjust the data-modulated mode.
Particularly, on the chip that carries out base band signal process of the present invention in roadside unit, do not use DSSS (direct sequence spread spectrum) the spread spectrum mode of common employing, but the mode that adopts OFDM (OFDM) and binary phase shift keying (BPSK) to combine.OFDM is the high speed transmission technology under a kind of wireless environment, and its basic thought is in frequency domain given channel to be divided into many orthogonal sub-channels, uses a subcarrier to modulate on each subchannel, and each subcarrier parallel transmission.Owing to adopt the notion of orthogonal frequency to distinguish different carrier wave branch roads, therefore allow each carrier wave frequency range overlapped, thereby significantly improved the availability of frequency spectrum.BPSK also is a kind of digital signal modulation mode commonly used, is widely used in numerous areas such as satellite, microwave communication, radio and television.For example in existing ETC system roadside unit, upstream data promptly adopts the BPSK mode to be handled.
In the present invention, when roadside unit communicates, user's vehicle data information from board units (OBU) at first successively enters the radiofrequency signal processing unit through the directional antenna and the WAP of roadside unit front end, after low noise amplifier (LNA) is handled, enter frequency converter and carry out the intermediate frequency frequency-conversion processing, be about to signal frequency and be converted to the intermediate frequency frequency range, handle so that follow-up analog to digital converter can carry out analog to digital conversion to signal from 5.8GHz.Data message after the intermediate frequency frequency-conversion processing enters baseband processing unit, after the process analog-to-digital conversion process, to carrying out despreading and demodulation process after the radiofrequency signal through BPSK modulation treatment and OFDM spread processing, wherein 4 are used to transmit pilot signal to be used to realize channel tracking and synchronous to the baseband processing unit facility with 52 subcarriers.The total length of each OFDM symbol is 4 μ s, comprising protection length 0.8 μ s at interval.Then, the data message after baseband processing unit is handled is transferred into the processing of unpacking of decoding of mac-layer protocol processing unit, and decapsulation is also removed packet header, restores primary data information (pdi).
Basic composition structure and the concrete technic relization scheme of the ETC system roadside unit RSU based on WLAN of the present invention have been introduced above.Further introduce the course of work of this ETC system roadside unit RSU below.ETC system roadside unit (RSU) based on WLAN provided by the present invention can provide reliable and stable wireless communication link (〉=6Mbps); Non-parking charge function under the support high-speed mobile (0km/h ~ 180km/h); And after a Fail Transaction, there are enough communication distances and time can realize transaction more than the secondary.Its concrete course of work comprises the steps: as shown in Figure 4
The first, open man-machine interface, the energized unit allows roadside unit enter the startup duty;
The second, after man-machine interface was opened, CPU (central processing unit) (CPU) drove resetting system, it is resetted to WAP (AP) adjust setting;
The 3rd, the directional antenna of WAP by its front end communicates with board units and is connected, and receives the user's vehicle data information from board units after the successful connection, and gives air feedback unit in the roadside unit with these data information transfer;
The 4th, air feedback unit sends the data message that receives to RF processing unit, and data message carries out low noise at RF processing unit and amplifies and the intermediate frequency frequency-conversion processing, transmits signals to baseband processing unit afterwards;
The 5th, baseband processing unit carries out mould/transformation of variables to data message, converts digital signal to, carries out despreading and demodulation process then, promptly separate and remove the OFDM spread processing and separate and remove the binary phase shift keying modulation treatment, again data message is sent to the mac-layer protocol processing unit;
The 6th, at the mac-layer protocol processing unit, to the data message processing of unpacking of decoding, decapsulation is also removed packet header, restores primary data information (pdi), and then sends CPU (central processing unit) (CPU) to.
The 7th, CPU (central processing unit) is sent to data storage cell with the user's vehicle data information that receives;
The 8th, data storage cell is compared vehicle data information that obtains from capture and identification system and the vehicle data information of coming from the CPU (central processing unit) transmission, and the result that will compare together returns to CPU (central processing unit) together with user and vehicle data information.
The 9th, if the result of comparison is correct, then embedded-type security security module (ESAM) will provide safe and secret mechanism to data message, send data message to backstage financial transaction processing enter by the transaction interface unit by CPU (central processing unit) then and settle accounts the accounting processing.Data message after the financial transaction processing enter is handled sends board units (OBU) to via directional antenna at last according to the reverse transmission of said process.If the erroneous results of comparison, then CPU (central processing unit) together returns the data message of user's vehicle to board units (OBU) by directional antenna through reverse transmission course together with the erroneous results information of comparing.Thereby finish whole process of exchange.
More than content of the present invention has been done detailed explanation by particular implementation of the present invention.For one of ordinary skill in the art, any conspicuous change of under the prerequisite that does not deviate from connotation of the present invention it being done all will constitute to infringement of patent right of the present invention, with corresponding legal responsibilities.
Claims (19)
1. ETC system roadside unit based on WLAN comprises: a WAP, be used in WLAN (wireless local area network), establishing a communications link with board units, and receive vehicle and user data that board units sends; One wireless network card is used to handle vehicle and a user data and the data processing unit that described WAP receives, and is used to examine described vehicle and user data; According to the verification result processing of charging.
2. the ETC system roadside unit based on WLAN according to claim 1 is characterized in that: comprise that also one is used to limit the WAP signal cover, and the directional antenna that links to each other with WAP.
3. the ETC system roadside unit based on WLAN according to claim 1, it is characterized in that: described wireless network card comprises: an air feedback unit is used for sending or receiving data information;
One RF processing unit is used for data are carried out frequency-conversion processing;
One baseband processing unit is used for data are carried out analog to digital conversion, demodulation, despreading processing; And
One mac-layer protocol processing unit, be used for to data message decode, decapsulation handles;
Described air feedback unit is connected with RF processing unit, this air feedback unit sends the data message that receives to RF processing unit, carrying out low noise amplifies and the intermediate frequency frequency-conversion processing, described RF processing unit is connected with baseband processing unit, the data message of baseband processing unit after to frequency-conversion processing carries out analog to digital conversion, after becoming digital signal, carry out despreading and demodulation process; Described baseband processing unit is connected with the mac-layer protocol processing unit, and the mac-layer protocol processing unit is to the data message processing of unpacking of decoding, and decapsulation is also removed packet header, restores primary data information (pdi), sends data processing unit then to.
4. the ETC system roadside unit based on WLAN according to claim 1 is characterized in that described data processing unit comprises: data storage cell is used for storage and waits to examine vehicle and user data; And CPU (central processing unit), be used to examine vehicle that board units sends and user data and described cell stores wait examine vehicle and whether user data identical, and handle accordingly.
5. the ETC system roadside unit based on WLAN according to claim 4, it is characterized in that, described data processing unit also comprises: one captures recognition unit, be used for all vehicles that real-time grasp shoot enters the roadside unit working range, and the information of vehicles of being captured discerned send described data storage cell then to.
6. the ETC system roadside unit based on WLAN according to claim 4, it is characterized in that, described data processing unit also comprises: a transaction interface unit, be used to connect described CPU (central processing unit) and backstage financial transaction processing enter, transmit the pay imformation of traffick to backstage financial transaction processing enter.
7. the ETC system roadside unit based on WLAN according to claim 3 is characterized in that: described roadside unit utilizes WLAN standard agreement and board units to communicate.
Described protocol of wireless local area network includes but not limited to the IEEE802.11 agreement.
8. according to claim 1 or 6 or 7 described ETC system roadside units, it is characterized in that also comprising power supply unit, be used to roadside unit to provide operation necessary energy based on WLAN.
9. the ETC system roadside unit based on WLAN according to claim 8, it is characterized in that also comprising the auxiliary unit that is connected with described CPU (central processing unit), described auxiliary unit can be the combination in any of following unit: embedded-type security security module, power light, status indicator lamp, traffic warning light control module, railing control module, roadside intercom system control module, resetting system, cooling system, wired connection interface unit, burglary-resisting system or man-machine interface automatically.
10. the ETC system roadside unit based on WLAN according to claim 1, it is characterized in that: described WAP contains the beacon adjustment module, is used to set beacon and sends the cycle, makes the per 20 milliseconds of transmissions of beacon once.
11. a method that realizes electric non-stop toll comprises the steps:
Steps A, roadside unit and board units establish a communications link in WLAN (wireless local area network);
Step B, wireless network card receives vehicle and the user data information that board units sends;
Step C, data processing unit receive described vehicle and user data information, it are examined, according to the verification result processing of charging.
12. the method for realization electric non-stop toll according to claim 11, it is characterized in that: described steps A is specially: the directional antenna of roadside unit front end receives the frame of inquiring after from board units (OBU), be transferred to WAP then, WAP returns a response frame and is transferred to board units to set up communicating to connect of board units and roadside unit by directional antenna.
13. the method for realization electric non-stop toll according to claim 11 is characterized in that: described step B is specially:
Step B1, WAP receives vehicle and the user data information that board units sends by directional antenna, and is transferred to the air feedback unit of roadside unit;
Step B2, air feedback unit sends the data message that receives to RF processing unit, and data message carries out low noise at RF processing unit and amplifies and frequency-conversion processing, sends baseband processing unit afterwards to;
Step B3, baseband processing unit carries out mould/transformation of variables to data message, converts digital signal to, carries out despreading and demodulation process then, data message is sent to the mac-layer protocol processing unit again;
Step B4, at the mac-layer protocol processing unit, to the data message processing of unpacking of decoding, decapsulation is also removed packet header, restores primary data information (pdi), and then sends CPU (central processing unit) to.
14. the method for realization electric non-stop toll according to claim 11 is characterized in that: described step C is specially:
Step C1, CPU (central processing unit) is sent to data storage cell with the user's vehicle data information that receives;
Step C2, data storage cell is compared vehicle data information that obtains from capture and identification system and the vehicle data information of coming from the CPU (central processing unit) transmission;
Step C3, if the result of comparison is correct, then embedded-type security security module (ESAM) will provide safe and secret mechanism to data message, by CPU (central processing unit) data message be passed through the transaction interface unit then, send backstage financial transaction processing enter to, settle accounts to adjust and handle;
Step C4, the data message after roadside unit will be handled sends board units to by directional antenna.
15. the method for realization electric non-stop toll according to claim 14 is characterized in that also comprising:
Step D, if the erroneous results of comparison, then roadside unit is with the data message of user's vehicle, together with the erroneous results information of comparison, together board units is given in passback.
16. method according to claim 11 or 12 described realization electric non-stop tolls, it is characterized in that, communicate by protocol of wireless local area network between described roadside unit and the board units, described protocol of wireless local area network includes but not limited to the IEEE802.11 agreement.
17. the method for realization electric non-stop toll according to claim 16 is characterized in that, in the process that described roadside unit and board units communicate, and the modulation system that adopts OFDM to combine to baseband signal with binary phase shift keying.
18. the method for realization electric non-stop toll according to claim 16 is characterized in that, in the process that described roadside unit and board units communicate, the MAC layer communicates based on csma/collision avoidance protocol.
19. the method for realization electric non-stop toll according to claim 13 is characterized in that, is meant in frequency-conversion processing described in the step B2 signal frequency is converted to the intermediate frequency frequency range from 5.8GHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610089216A CN100580714C (en) | 2006-08-09 | 2006-08-09 | ETC system roadside unit based on WLAN and charging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610089216A CN100580714C (en) | 2006-08-09 | 2006-08-09 | ETC system roadside unit based on WLAN and charging method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101123006A true CN101123006A (en) | 2008-02-13 |
| CN100580714C CN100580714C (en) | 2010-01-13 |
Family
ID=39085331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610089216A Active CN100580714C (en) | 2006-08-09 | 2006-08-09 | ETC system roadside unit based on WLAN and charging method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100580714C (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102194260A (en) * | 2011-06-09 | 2011-09-21 | 北京握奇数据***有限公司 | On-vehicle unit, and system and method for processing business |
| CN102750744A (en) * | 2011-04-19 | 2012-10-24 | 中兴通讯股份有限公司 | Electronic toll collection system and vehicle information updating method thereof |
| CN103177479A (en) * | 2011-12-20 | 2013-06-26 | 北京北大千方科技有限公司 | Road side equipment and data processing method in road side equipment |
| CN103679827A (en) * | 2013-12-15 | 2014-03-26 | 张忠义 | Automatic supervisory system and method for city parking charging |
| CN103729891A (en) * | 2013-01-31 | 2014-04-16 | 深圳市金溢科技有限公司 | Road side unit equipment, method for processing transaction with the same and ETC system |
| CN104573757A (en) * | 2014-02-11 | 2015-04-29 | 深圳市金溢科技股份有限公司 | On-board unit or IC (integrated circuit) card recovery method, exit lane system and data center |
| CN105096396A (en) * | 2015-09-28 | 2015-11-25 | 成都思晗科技股份有限公司 | Non-stop electronic toll collection system for expressway |
| CN105227450A (en) * | 2015-11-03 | 2016-01-06 | 株洲南车时代电气股份有限公司 | A kind of track traffic WLAN gateway plug-in unit |
| CN105303627A (en) * | 2015-09-28 | 2016-02-03 | 成都思晗科技股份有限公司 | Highway non-stop charging system |
| CN105869221A (en) * | 2016-03-30 | 2016-08-17 | 中国矿业大学 | Beacon for road toll collection system |
| CN106373205A (en) * | 2016-09-27 | 2017-02-01 | 北海益生源农贸有限责任公司 | Parking fee collection intelligent control system |
| CN108198256A (en) * | 2017-12-29 | 2018-06-22 | 北京工业大学 | Trackside intelligent parking toll collection system based on ETC technologies |
| CN108805999A (en) * | 2018-03-30 | 2018-11-13 | 广东联合电子服务股份有限公司 | Vehicle on highway charging method, system and storage medium based on ring road free flow |
| CN109523796A (en) * | 2018-12-03 | 2019-03-26 | 南京诚勤教育科技有限公司 | The method for often using rider using information of vehicles and wireless network card address information |
| CN109920073A (en) * | 2019-02-20 | 2019-06-21 | 深圳成谷科技有限公司 | A kind of ETC method of commerce and the roadside unit antenna for ETC transaction |
| CN110689634A (en) * | 2019-11-26 | 2020-01-14 | 交通运输部路网监测与应急处置中心 | Communication method suitable for truck ETC lane system and lane system |
| CN110708667A (en) * | 2018-07-09 | 2020-01-17 | 陕西国广数码科技有限公司 | On-vehicle OBU equipment |
-
2006
- 2006-08-09 CN CN200610089216A patent/CN100580714C/en active Active
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102750744A (en) * | 2011-04-19 | 2012-10-24 | 中兴通讯股份有限公司 | Electronic toll collection system and vehicle information updating method thereof |
| CN102194260A (en) * | 2011-06-09 | 2011-09-21 | 北京握奇数据***有限公司 | On-vehicle unit, and system and method for processing business |
| CN103177479B (en) * | 2011-12-20 | 2015-09-30 | 北京北大千方科技有限公司 | Road side equipment and data processing method in road side equipment |
| CN103177479A (en) * | 2011-12-20 | 2013-06-26 | 北京北大千方科技有限公司 | Road side equipment and data processing method in road side equipment |
| CN103729891B (en) * | 2013-01-31 | 2016-09-28 | 深圳市金溢科技股份有限公司 | Road side unit equipment and process transaction method and ETC system |
| CN103729891A (en) * | 2013-01-31 | 2014-04-16 | 深圳市金溢科技有限公司 | Road side unit equipment, method for processing transaction with the same and ETC system |
| CN103679827B (en) * | 2013-12-15 | 2016-03-16 | 张忠义 | A kind of automatic monitoring system of city parking charge and method |
| CN103679827A (en) * | 2013-12-15 | 2014-03-26 | 张忠义 | Automatic supervisory system and method for city parking charging |
| CN104573757B (en) * | 2014-02-11 | 2017-08-29 | 深圳市金溢科技股份有限公司 | Board units or IC-card recovery method, exit lane system and data center |
| CN104573757A (en) * | 2014-02-11 | 2015-04-29 | 深圳市金溢科技股份有限公司 | On-board unit or IC (integrated circuit) card recovery method, exit lane system and data center |
| CN105096396A (en) * | 2015-09-28 | 2015-11-25 | 成都思晗科技股份有限公司 | Non-stop electronic toll collection system for expressway |
| CN105096396B (en) * | 2015-09-28 | 2017-05-31 | 成都思晗科技股份有限公司 | For the no-stop charging system of highway |
| CN105303627B (en) * | 2015-09-28 | 2018-01-19 | 成都思晗科技股份有限公司 | Highway toll collection system |
| CN105303627A (en) * | 2015-09-28 | 2016-02-03 | 成都思晗科技股份有限公司 | Highway non-stop charging system |
| CN105227450B (en) * | 2015-11-03 | 2019-01-15 | 株洲南车时代电气股份有限公司 | A kind of rail traffic WLAN gateway equipment |
| CN105227450A (en) * | 2015-11-03 | 2016-01-06 | 株洲南车时代电气股份有限公司 | A kind of track traffic WLAN gateway plug-in unit |
| CN105869221A (en) * | 2016-03-30 | 2016-08-17 | 中国矿业大学 | Beacon for road toll collection system |
| CN106373205A (en) * | 2016-09-27 | 2017-02-01 | 北海益生源农贸有限责任公司 | Parking fee collection intelligent control system |
| CN108198256A (en) * | 2017-12-29 | 2018-06-22 | 北京工业大学 | Trackside intelligent parking toll collection system based on ETC technologies |
| CN108805999A (en) * | 2018-03-30 | 2018-11-13 | 广东联合电子服务股份有限公司 | Vehicle on highway charging method, system and storage medium based on ring road free flow |
| CN110708667A (en) * | 2018-07-09 | 2020-01-17 | 陕西国广数码科技有限公司 | On-vehicle OBU equipment |
| CN109523796A (en) * | 2018-12-03 | 2019-03-26 | 南京诚勤教育科技有限公司 | The method for often using rider using information of vehicles and wireless network card address information |
| CN109920073A (en) * | 2019-02-20 | 2019-06-21 | 深圳成谷科技有限公司 | A kind of ETC method of commerce and the roadside unit antenna for ETC transaction |
| CN110689634A (en) * | 2019-11-26 | 2020-01-14 | 交通运输部路网监测与应急处置中心 | Communication method suitable for truck ETC lane system and lane system |
| CN110689634B (en) * | 2019-11-26 | 2021-12-14 | 交通运输部路网监测与应急处置中心 | Communication method suitable for truck ETC lane system and lane system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100580714C (en) | 2010-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100580714C (en) | ETC system roadside unit based on WLAN and charging method | |
| CN100580713C (en) | Electronic no parking toll system based on wireless LAN and its realizing method | |
| CN101123546A (en) | ETC system onboard unit and its implementation method based on WLAN | |
| CN101248689B (en) | Transfer of Ethernet packets via a CPRI-interface | |
| CN101123456A (en) | Communication method for onboard units and byroad units of ETC system based on WLAN | |
| EP1931086A3 (en) | A method and system for coexistence between 20 MHZ and 40 MHZ overlapping basic service sets (OBSS) in wireless local area networks | |
| CN101895964B (en) | Mobile station and method for scanning service group identification code by mobile station | |
| CN101183903A (en) | Digital optical fiber repeater system | |
| CN109756244A (en) | For the Unmanned Aerial Vehicle Data Link system architecture device of data transmission asymmetry | |
| CN112672319A (en) | Road test system and equipment integrating ETC function | |
| CN106162945A (en) | Honeycomb base station device and data transmission method, communication equipment and communication system | |
| CN101272296B (en) | Multi-module wireless network device, system and method | |
| CN100466570C (en) | WLAN access point and its access method | |
| JP2003115842A (en) | Wired/wireless integrated type terminal device and wired /wireless integrated network | |
| CN101001472A (en) | Two-way heterogeneous broadcast network | |
| CN106888467A (en) | A kind of high ferro WIFI systems based on millimeter wave | |
| KR101089826B1 (en) | Propagation method of emergency messages by heterogeneous network road-side wquipment in intelligent transport system | |
| CN110445529A (en) | A kind of satellite things-internet gateway station and information transferring method | |
| CN100557993C (en) | The modulation jump method that is used for frequency hopping communications | |
| CN107895405A (en) | For the method, apparatus and system to vehicle toll on half-duplex channel | |
| CN107979566A (en) | A kind of emergent video-encryption transmission equipment of double-channel fusion | |
| KR20010090037A (en) | Wireless local area network connecting device | |
| KR100664513B1 (en) | Method and apparatus for repeating system of portable internet | |
| CN217135487U (en) | Wireless transceiver and ETC system | |
| CN215495128U (en) | ETC radio frequency module and microwave intelligent antenna device |
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 | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100015 Beijing city Chaoyang District Dongzhimen West eight Street No. 2 room Wanhong Yan Dong Business Garden Patentee after: BEIJING WATCHDATA Co.,Ltd. Address before: 100015 Beijing city Chaoyang District Dongzhimen West eight Street No. 2 room Wanhong Yan Dong Business Garden Patentee before: BEIJING WATCH DATA SYSTEM Co.,Ltd. |
|
| DD01 | Delivery of document by public notice |
Addressee: BEIJING WATCHDATA Co.,Ltd. Person in charge of patents Document name: payment instructions |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: BEIJING WATCHDATA Co.,Ltd. Person in charge of patents Document name: payment instructions |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: BEIJING WATCHDATA Co.,Ltd. Person in charge of patents Document name: Notice of Termination of Patent Rights |
|
| DD01 | Delivery of document by public notice |