CN103854317A - Communication method of ETC system - Google Patents
Communication method of ETC system Download PDFInfo
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- CN103854317A CN103854317A CN201210510204.0A CN201210510204A CN103854317A CN 103854317 A CN103854317 A CN 103854317A CN 201210510204 A CN201210510204 A CN 201210510204A CN 103854317 A CN103854317 A CN 103854317A
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Abstract
The invention discloses a communication method and device of an ETC system. The method comprises the steps that an RSU notifies an RSU identifier of the RSU to an OBU when building a special link with the OBU; after sending a point-to-point instruction to the OBU, the RSU receives a point-to-point response returned by the OBU according to the point-to-point instruction; after determining that an RSU identifier carried in the point-to-point response is matched with the RSU identifier of the RSU, the RSU accepts the point-to-point response. By means of the communication method of the ETC system, the RSU only receives point-to-point information with the RSU identifier consistent with the RSU identifier of the RSU, and therefore interference caused because the RSU mistakenly receives point-to-point information sent to other RSUs by the OBU is avoided, and the success rate of ETC transaction is increased.
Description
Technical field
The present invention relates to the communications field, in particular to communication means and the device of a kind of electric non-stop toll (Electronic Toll Collection, referred to as ETC) system.
Background technology
Along with the increasing year by year of city vehicle and ETC application are accepted by user day by day, the Large scale construction ETC in the same way demand of multilane is more and more urgent, and multilane application brings Lin road interference problem to become ETC system problem demanding prompt solution.
In ETC lane system, board units (On Board Unit, referred to as the OBU) communication on roadside unit (Rate-Senor Unit, referred to as RSU) and this track under normal circumstances, completing concludes the business and argue for the sake of arguing has made the vehicle of charge pass through Fare Collection System.And OBU and RSU between adjacent two ETC tracks influences each other, thereby may cause Fail Transaction, for example, the reply of the main stem antenna of this OBU given the OBU receiving by neighboring trace antenna, but whether can not distinguish this reply to oneself, thereby this reply may be mistakened as into the reply to oneself, and then initiatively carry out specially to link establishment with OBU, thereby disturb OBU to cause Fail Transaction.
Monkey chatter source is many-sided, such as project installation: antenna installation site, tilted angle of antenna do not meet actual conditions, lane design: track has large reverberation etc. around, antenna transmission power setting is improper, OBU receiving sensitivity is inconsistent, and OBU emissive power is inconsistent etc., above situation all may cause monkey chatter.Because the situation in actual track varies, the problem in complete shield engineering very difficult.Homogeneity of product problem is also the difficult problem that most ETC producer cannot solve completely.
A main method of evading at present monkey chatter is that adjacent ETC track is used different frequency communication according to the dual-frequency point channel (5.83GHz and 5.84GHz) of ETC GB agreement regulation, so that a RSU cannot receive the reply of OBU to another RSU.But as shown in Figure 1, the reception of OBU is broadband, set up in the process of broadcasting link at RSU and OBU, OBU can reply the beacon table (VST) of different frequent points to adjacent RSU, cause adjacent antenna all can seek to set up specially to link with OBU, it (is simplified model here that OBU can set frequency according to the BST finally receiving, acquiescence main stem RSU signal strength is stronger, finally can lock main stem frequency) the preference return point-to-point order of first receiving, if first receive the order that neighboring trace RSU is received in the order of this road RSU again, OBU Hui Xiangeizhe road RSU replys response, again the order of neighboring trace RSU is used as and is retransmitted order, the reply of Er Jianggeizhe road RSU directly replies to neighboring trace RSU, because the frequency of OBU is different from the frequency of neighboring trace RSU, thereby cause neighboring trace RSU to accept, overtime rear neighboring trace RSU sends and discharges link command, OBU receives release link command, end to conclude the business with main stem RSU, thereby cause Fail Transaction, if first receive neighboring trace RSU order, OBU correctly replys data to neighboring trace RSU, but because frequency difference, same neighboring trace RSU cannot accept, and discharges link, and then causes main stem Fail Transaction.Another situation, agreement only has two frequencies at present, and the frequency in track, interval can be also the same, can shine into equally co-channel interference if track, interval has antenna sidelobe signal to cover.
Summary of the invention
For the problem that causes Fail Transaction in ETC system due to monkey chatter, the invention provides a kind of communication means and device of ETC system, at least one of to address the above problem.
According to an aspect of the present invention, provide a kind of communication means of ETC system, having comprised: roadside unit RSU has been having set up specially in link process with board units OBU, by the RSU mark notice of described RSU to described OBU; Described RSU to described OBU sending point to dot command after, receive point-to-point the replying that described OBU returns for described point-to-point order; Described RSU determines that the RSU mark of carrying in described point-to-point replying is marking matched with the RSU of described RSU, accepts described point-to-point replying.
Preferably, RSU, setting up specially in link process with OBU, also comprises: described RSU obtains the OBU mark of described OBU; Described RSU also comprises before accepting described point-to-point replying: described RSU determines that the OBU mark of carrying in described point-to-point replying is marking matched with the described OBU obtaining.
Preferably, the RSU mark notice of described RSU, to described OBU, being comprised: the OBU within the scope of the broadcasting command query communication that the RSU that described RSU transmission carries described RSU identifies; Described RSU obtains the OBU mark of described OBU, comprising: described RSU receives the beacon table that described OBU receives the OBU mark that carries described OBU of returning after described broadcasting command and replys.
Preferably, described point-to-point order comprises: action ACTION order and link discharge EndApp order.
According to a further aspect of the invention, provide a kind of communication means of ETC system, having comprised: board units OBU, setting up specially in link process with roadside unit RSU, has obtained the RSU mark of described RSU; Described OBU receives the point-to-point order that RSU sends; Described OBU determines that the RSU mark of carrying in described point-to-point order is marking matched with the described RSU that described OBU obtains, and sends the point-to-point of described point-to-point order reply to described RSU, wherein, carries described RSU mark in described point-to-point replying.
Preferably, OBU setting up specially in link process with RSU, also comprises: described OBU by the OBU mark notice of described OBU to described RSU; Described OBU, before sending point-to-point the replying of described point-to-point order to described RSU, also comprises: described OBU determines that the OBU mark of carrying in described point-to-point order is marking matched with the OBU of this OBU.
Preferably, described OBU obtains the RSU mark of described RSU, comprising: described OBU receives the broadcasting command of the RSU mark that carries described RSU of described RSU transmission; The OBU mark notice of described OBU, to described RSU, being comprised: the beacon table that described OBU returns to described RSU the OBU mark that carries described OBU is replied.
Preferably, described point-to-point order comprises: action ACTION order and link discharge EndApp order.
According to a further aspect of the invention, a kind of communicator of ETC system is provided, has been arranged in RSU, having comprised: notification module, for setting up specially to link process at roadside unit RSU and board units OBU, the RSU mark of described RSU is notified to described OBU; Receiver module, for to described OBU sending point to dot command after, receive point-to-point the replying that described OBU returns for described point-to-point order; Determination module, marking matched with the RSU of described RSU for determining the described point-to-point RSU mark of carrying of replying; Accept module, for after described determination module is determined, accept described point-to-point replying.
Preferably, described device also comprises: acquisition module, for setting up specially to link process at RSU and OBU, obtains the OBU mark of described OBU; Described determination module, before also accepting described point-to-point replying for described RSU, determines that the OBU mark of carrying in described point-to-point replying is marking matched with the described OBU obtaining.
Preferably, described notification module in such a way by the RSU mark notice of described RSU to described OBU: send the OBU within the scope of the broadcasting command query communication of the RSU mark that carries described RSU; Described acquisition module obtains the OBU mark of described OBU in such a way: receive the beacon table that described OBU receives the OBU mark that carries described OBU of returning after described broadcasting command and reply.
According to another aspect of the invention, provide a kind of communicator of ETC system, be arranged at OBU, having comprised: acquiring unit, for setting up specially to link process at board units OBU and roadside unit RSU, obtains the RSU mark of described RSU; Receiving element, the point-to-point order sending for receiving RSU; Determining unit, the RSU mark of carrying for definite described point-to-point order is marking matched with the described RSU that described OBU obtains; Transmitting element, after determining in described determining unit, sends the point-to-point of described point-to-point order to described RSU and replys, and wherein, carries described RSU mark in described point-to-point replying.
Preferably, described device also comprises: notification unit, for setting up specially to link process at OBU and RSU, the OBU mark of described OBU is notified to described RSU; Described determining unit, also for before sending point-to-point the replying of described point-to-point order to described RSU, determines that the OBU mark of carrying in described point-to-point order is marking matched with the OBU of this OBU.
Preferably, described acquiring unit obtains the RSU mark of described RSU in such a way: the broadcasting command that receives the RSU mark that carries described RSU of described RSU transmission; Described notification unit is notified the OBU mark of described OBU to described RSU in such a way: the beacon table that returns to the OBU mark that carries described OBU to described RSU is replied.
By the present invention, RSU is special in the process of link with OBU foundation, the RSU mark of this RSU is notified to OBU, OBU with RSU communication process in RSU mark is carried in point-to-point message, thereby RSU only receives RSU mark and identifies consistent point-to-point message with self RSU, thereby avoid RSU mistake to receive the interference that OBU sends to the point-to-point message of other RSU to bring, and then improved the success ratio of ETC transaction.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram that sends monkey chatter according to the neighboring trace RSU of correlation technique;
Fig. 2 is according to the process flow diagram of the communication means of the ETC system of the embodiment of the present invention one;
Fig. 3 is according to the schematic diagram of the communicator of the ETC system of the embodiment of the present invention one;
Fig. 4 is according to the schematic diagram of the communicator of the embodiment of the present invention one preferred ETC system;
Fig. 5 is according to the process flow diagram of the communication means of the ETC system of the embodiment of the present invention two;
Fig. 6 is according to the schematic diagram of the communicator of the ETC system of the embodiment of the present invention two;
Fig. 7 is according to the schematic diagram of the communicator of the embodiment of the present invention two preferred ETC systems;
Fig. 8 is according to the process flow diagram of the communication means of the ETC system of the embodiment of the present invention three.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.
Embodiment mono-
According to the embodiment of the present invention, a kind of communication means of ETC system is provided, RSU is special in the process of link with OBU foundation, the RSU mark (RSUID) of RSU is notified to OBU, OBU with RSU communication process in RSU mark is carried in point-to-point message, RSU only receives RSU mark and identifies consistent point-to-point message with self RSU, thus the interference of having avoided RSU mistake reception OBU to send to the point-to-point message of other RSU to bring.
Fig. 2 is according to the process flow diagram of the communication means of the ETC system of the embodiment of the present invention one, and as shown in Figure 2, the method can comprise following step (step S202-step S206):
Step S202, RSU is setting up specially in link process with OBU, by the RSU mark notice of RSU to OBU.
Step S204, RSU to OBU sending point to dot command after, receive point-to-point the replying returned for this point-to-point order of OBU.
Step S206, RSU determines that the RSU mark of carrying in this point-to-point replying is marking matched with the RSU of this RSU, accepts this point-to-point replying.
Pass through the embodiment of the present invention, RSU is special in the process of link with OBU foundation, the RSU mark of this RSU is notified to OBU, OBU with RSU communication process in RSU mark is carried in point-to-point message, thereby RSU only receives RSU mark and identifies consistent point-to-point message with self RSU, thereby the interference of having avoided RSU mistake reception OBU to send to the point-to-point message of other RSU to bring.
What receive other OBU for fear of RSU mistake point-to-pointly replys brought interference, in a preferred implementation of the embodiment of the present invention, RSU is setting up specially in link process with OBU, can also obtain the OBU mark of OBU, RSU during to dot command, carries the RSU mark of this RSU and the OBU mark of obtaining to OBU sending point in point-to-point order.OBU receives after the point-to-point order of RSU transmission, determine that the OBU mark of carrying in this point-to-point order is marking matched with the OBU of this OBU, and determine that the RSU when RSU carrying in this point-to-point order identifies and connects is marking matched, OBU returns to the point-to-point of this point-to-point order to RSU and replys, and RSU mark when carrying the OBU mark of this OBU and connect in point-to-point replying.After point-to-point the replying that RSU reception OBU returns for point-to-point order, determine that the RSU mark of carrying in this point-to-point replying is marking matched with the RSU of this RSU, further, RSU can also determine that the OBU mark of carrying in point-to-point replying is marking matched with the OBU obtaining, and accepts this point-to-point replying.By this preferred implementation, RSU has obtained the OBU mark with the OBU of RSU link setup, make RSU in the time receiving point-to-point the replying that OBU returns, can determine this point-to-point reply from the OBU of this RSU link setup after be for further processing, and then avoided that RSU mistake receives other OBU point-to-pointly reply brought interference.
In another preferred implementation of the embodiment of the present invention, RSU can send the OBU within the scope of broadcasting command (BST) query communication, and the RSU that carries RSU in broadcasting command (for example identifies, in antenna unique identification RSUID field in BST, carry the RSU mark of RSU), the RSU mark notice of RSU is given and the OBU of this RSU link setup.OBU receives the backward RSU of broadcasting command and replys beacon table VST and reply, and in VST, carries OBU unique identification OBUID, and preferably, OBU can record the RSU mark with the RSU of OBU link setup.RSU receives after the VST that OBU returns, and obtains the OBUID carrying in VST, and preferably, RSU can record the OBU mark with the OBU of RSU link setup.RSU with the OBU point-to-point communication process of this RSU link setup in, be carried in point-to-point order this OBUID as command header, and in point-to-point order, carry the RSU mark of RSU.
Or in specific implementation process, RSU, setting up specially in link process with OBU, also can only obtain the OBU mark of OBU, preferably, RSU can record the OBU mark getting.RSU with OBU point-to-point communication process in, RSU to OBU sending point to dot command after, receive point-to-point the replying that RSU sends, and receiving after this point-to-point replying, determine that the OBU mark of carrying in this point-to-point order is marking matched with the OBU obtaining, RSU accepts this point-to-point replying, otherwise RSU abandons receive point-to-point and replys.By this preferred implementation, RSU is receiving after point-to-point replying, and determines point-to-point replying when with the OBU of this RSU link setup, just returns to point-to-point replying to RSU, and that has avoided that RSU mistake receives that other OBU send point-to-pointly replys brought interference.
After establishing the link, RSU and OBU can carry out point-to-point communication with OBU.For example, RSU can send ACTION order to OBU, and in ACTION order, carries the RSU mark (for example, can carry RSU mark by the application id field (IID) in ACTION command format) of RSU, and identifies with the OBU of the OBU of RSU link setup.OBU receives after ACTION order, determine that the OBU mark of carrying in ACTION order is marking matched with the OBU of this OBU, and the RSU carrying in definite ACTION order mark is marking matched with the RSU of record, OBU returns to ACTION to this RSU and replys, and completes identification and ETC process of exchange.
RSU Transaction Success or in transaction because data check is made mistakes, receive time-out, terminal consumption security module (Purchase Secure Access Module, referred to as PSAM) while the reason Fail Transaction such as makeing mistakes, send and discharge link command to OBU, and the RSU that carries RSU in release link command (for example identifies, can carry RSU mark by the application id field (IID) discharging in link command form), and with the OBU mark of the OBU of RSU link setup.OBU receives and discharges after link command, determine that discharging the OBU carrying in link command identifies with the OBU of this OBU marking matched, and it is marking matched to determine that the RSU carrying in release link command identifies with the RSU of record, OBU discharges the link between RSU, the point-to-point communication of end and RSU.
According to the embodiment of the present invention, a kind of communicator of ETC system is also provided, this device can be arranged in RSU, the said method providing in order to realize the embodiment of the present invention.
Fig. 3 is according to the schematic diagram of the communicator of the ETC system of the embodiment of the present invention one, and as shown in Figure 3, this device mainly comprises: notification module 302, receiver module 304, determination module 306 and accept module 308.Wherein, notification module 302, for setting up specially to link process at RSU and OBU, notifies the RSU mark of RSU to OBU; Receiver module 304, is coupled with notification module 302, for to OBU sending point to dot command after, receive point-to-point the replying returned for this point-to-point order of OBU; Determination module 306, is coupled with receiver module 304, marking matched with the RSU of RSU for determining this point-to-point RSU mark of carrying of replying, and triggers and accepts module 308; Accept module 308, be coupled with determination module 306, for after determination module 306 is determined, accept point-to-point the replying that receiver module 304 receives.
Pass through the embodiment of the present invention, RSU is special in the process of link with OBU foundation, notification module 302 notifies the RSU mark of this RSU to OBU, OBU with RSU communication process in RSU mark is carried in point-to-point message, determination module 306 determines that the RSU mark of carrying in this point-to-point replying is marking matched with the RSU of RSU, thereby RSU only receives RSU mark and identifies consistent point-to-point message with self RSU, thereby the interference of having avoided RSU mistake reception OBU to send to the point-to-point message of other RSU to bring.
What receive other OBU for fear of RSU mistake point-to-pointly replys brought interference, and RSU, setting up specially in link process with OBU, can also obtain the OBU mark of OBU.Therefore, in a preferred implementation of the embodiment of the present invention, as shown in Figure 4, this device can also comprise: acquisition module 310, for setting up specially to link process at RSU and OBU, obtains the OBU mark of OBU.RSU during to dot command, carries the RSU mark of this RSU and the OBU mark of obtaining to OBU sending point in point-to-point order.OBU receives after the point-to-point order of RSU transmission, determine that the OBU mark of carrying in this point-to-point order is marking matched with the OBU of this OBU, and determine that the RSU when RSU carrying in this point-to-point order identifies and connects is marking matched, OBU returns to the point-to-point of this point-to-point order to RSU and replys, and RSU mark when carrying the OBU mark of this OBU and connect in point-to-point replying.After receiver module 304 receives point-to-point the replying that OBU returns for point-to-point order, determination module 306 determines that the RSU mark of carrying in this point-to-point replying is marking matched with the RSU of this RSU, further, determination module 306 can also determine that the OBU mark of carrying in point-to-point replying is marking matched with the OBU obtaining, and accepts module 308 and accepts this point-to-point replying.By this preferred implementation, RSU has obtained the OBU mark with the OBU of RSU link setup, make RSU in the time receiving point-to-point the replying that OBU returns, can determine this point-to-point reply from the OBU of this RSU link setup after be for further processing, and then avoided that RSU mistake receives other OBU point-to-pointly reply brought interference.
In another preferred implementation of the embodiment of the present invention, notification module 302 can send the OBU within the scope of broadcasting command BST query communication, and the RSU that carries RSU in broadcasting command (for example identifies, in antenna unique identification RSUID field in BST, carry the RSU mark of RSU), the RSU mark notice of RSU is given and the OBU of this RSU link setup.OBU receives the backward RSU of broadcasting command and replys beacon table VST and reply, and in VST, carries OBU unique identification OBUID, and preferably, OBU can record the RSU mark with the RSU of OBU link setup.Receiver module 304 receives that after the VST that OBU returns, acquisition module 310 obtains the OBUID carrying in VST, and preferably, RSU can record the OBU mark with the OBU of RSU link setup.RSU with the OBU point-to-point communication process of this RSU link setup in, be carried in point-to-point order this OBUID as command header, and in point-to-point order, carry the RSU mark of RSU.
After establishing the link, RSU and OBU can carry out point-to-point communication with OBU.For example, RSU can send ACTION order to OBU, and in ACTION order, carries the RSU mark (for example, can carry RSU mark by the application id field IID in ACTION command format) of RSU, and with the OBU mark of the OBU of RSU link setup.OBU receives after ACTION order, determine that the OBU mark of carrying in ACTION order is marking matched with the OBU of this OBU, and the RSU carrying in definite ACTION order mark is marking matched with the RSU of record, OBU returns to ACTION to this RSU and replys, and completes identification and ETC process of exchange.Receiver module 304 receives ACTION reply after, the RSU mark of carrying during the definite ACTION of determination module 306 replys is marking matched with the RSU of this RSU, and the OBU mark that definite ACTION carries in replying is marking matched with the OBU obtaining, accepts module 308 and accept ACTION and reply.
RSU is in Transaction Success or in transaction because when the reason Fail Transaction such as data check is made mistakes, receive time-out, PSAM are made mistakes, send and discharge link command to OBU, and the RSU that carries RSU in release link command (for example identifies, can carry RSU mark by the application id field IID discharging in link command form), and with the OBU mark of the OBU of RSU link setup.OBU receives and discharges after link command, determine that discharging the OBU carrying in link command identifies with the OBU of this OBU marking matched, and it is marking matched to determine that the RSU carrying in release link command identifies with the RSU of record, OBU discharges the link between RSU, the point-to-point communication of end and RSU.
Embodiment bis-
According to the embodiment of the present invention, a kind of communication means of ETC system is provided, OBU, setting up specially in link process with RSU, obtains the RSU mark of RSU.OBU with RSU point-to-point communication process in, receive the point-to-point order that RSU sends, and in the time determining that the RSU carrying in point-to-point order identifies and the RSU obtaining of this OBU is marking matched, point-to-point the replying that carries OBU mark to RSU sending point to dot command, the interference that the point-to-point order of having avoided OBU mistake to receive other RSU transmissions causes.
Fig. 5 is according to the process flow diagram of the communication means of the ETC system of the embodiment of the present invention two, and as shown in Figure 5, the method can comprise following step (step S502-step S506):
Step S502, OBU, setting up specially in link process with RSU, obtains the RSU mark of RSU;
Step S504, OBU receives the point-to-point order that RSU sends;
Step S506, OBU determines that the RSU mark of carrying in this point-to-point order is marking matched with the RSU obtaining, and sends the point-to-point of this point-to-point order to RSU and replys, and carries the OBU mark of this OBU in this point-to-point replying.
Pass through the embodiment of the present invention, OBU is setting up specially in link process with RSU, obtain the RSU mark of RSU, OBU with RSU point-to-point communication process in, receive the point-to-point order that RSU sends, and in the time determining that the RSU mark of carrying in point-to-point order and the RSU obtaining are marking matched, point-to-point the replying that carries OBU mark to RSU sending point to dot command, the interference that the point-to-point order of having avoided OBU mistake to receive other RSU transmissions causes.
Receive for fear of OBU mistake send to other OBU point-to-point and reply brought interference, in a preferred implementation of the embodiment of the present invention, OBU, can also be by the OBU mark notice of this OBU to RSU setting up specially in link process with RSU.With RSU point-to-point communication process in, OBU receives after the point-to-point order of RSU transmission, OBU determines that the RSU mark of carrying in this point-to-point order is marking matched with the RSU obtaining, further, OBU determines that the OBU mark of carrying in this point-to-point order is marking matched with the OBU of this OBU, and OBU sends to RSU the point-to-point of point-to-point order receiving and replys.By this preferred implementation, OBU with RSU point-to-point communication process in, can confirm that the point-to-point order receiving is the point-to-point order that sends to oneself, OBU is only received send to the point-to-point order of this OBU, avoided OBU mistake to receive the interference that sends to the point-to-point order of other OBU to bring.
In another preferred implementation of the embodiment of the present invention, RSU can send the OBU within the scope of broadcasting command BST query communication, and the RSU that carries RSU in broadcasting command (for example identifies, in antenna unique identification RSUID field in BST, carry the RSU mark of RSU), OBU obtains the RSU mark of RSU from broadcasting command, preferably, OBU can preserve the RSU mark of obtaining.OBU receives the backward RSU reply of broadcasting command beacon table VST and replys, and in VST, carries OBU unique identification OBUID, and the OBU mark of this OBU is notified to RSU.RSU receives after the VST that OBU returns, and obtains the OBUID carrying in VST, and preferably, RSU can record the OBU mark with the OBU of RSU link setup.OBU with the RSU point-to-point communication process of this OBU link setup in, the RSU mark of obtaining is carried in point-to-point order, and in point-to-point order, carries the OBU mark of OBU.
Or in specific implementation process, OBU is setting up specially in link process with RSU, also can be only by the OBU mark notice of this OBU to RSU.OBU with RSU point-to-point communication process in, receive the point-to-point order that RSU sends, and receiving after this point-to-point order, determine that the OBU mark of carrying in this point-to-point order is marking matched with the OBU of this OBU, to RSU reentry point, the point-to-point of dot command replied, otherwise OBU abandons the point-to-point order receiving.By this preferred implementation, OBU is receiving after point-to-point order, determine that point-to-point order is the point-to-point order that sends to oneself, return to point-to-point replying to RSU, avoided OBU mistake to receive the interference that sends to the point-to-point order of other OBU to bring.
After establishing the link, OBU and RSU can carry out point-to-point communication with RSU.For example, RSU can send ACTION order to OBU, and in ACTION order, carries the RSU mark (for example, can carry RSU mark by the application id field IID in ACTION command format) of RSU, and with the OBU mark of the OBU of RSU link setup.OBU receives the ACTION order that RSU sends, and receive after ACTION order at OBU, determine that the OBU mark of carrying in ACTION order is marking matched with the OBU of this OBU, and the RSU carrying in definite ACTION order mark is marking matched with the RSU of record, OBU returns to ACTION to this RSU and replys, and completes identification and ETC process of exchange.
RSU is in Transaction Success or in transaction because when the reason Fail Transaction such as data check is made mistakes, receive time-out, PSAM are made mistakes, send and discharge link command to OBU, and the RSU that carries RSU in release link command (for example identifies, can carry RSU mark by the application id field IID discharging in link command form), and with the OBU mark of the OBU of RSU link setup.OBU receives and discharges after link command, determine that discharging the OBU carrying in link command identifies with the OBU of this OBU marking matched, and it is marking matched to determine that the RSU carrying in release link command identifies with the RSU of record, OBU discharges the link between RSU, the point-to-point communication of end and RSU.If the OBU carrying in the release link command that OBU receives mark is not mated with the OBU mark of this OBU, OBU abandons this release link command, or enters dormant state.
According to the embodiment of the present invention, a kind of communicator of ETC system is also provided, this device can be arranged in OBU, the said method providing in order to realize the embodiment of the present invention.
Fig. 6 is according to the schematic diagram of the communicator of the ETC system of the embodiment of the present invention two, and as shown in Figure 6, this device mainly comprises: acquiring unit 602, receiving element 604, determining unit 606 and transmitting element 608.Wherein, acquiring unit 602, for setting up specially to link process at OBU and RSU, obtains the RSU mark of RSU; Receiving element 604, is coupled with acquiring unit 602, the point-to-point order sending for receiving RSU; Determining unit 606, is coupled with receiving element 604, and the RSU mark of carrying for definite point-to-point order is marking matched with the RSU that acquiring unit 602 obtains; Transmitting element 608, is coupled with determining unit 606, after determining in determining unit 606, to RSU sending point, the point-to-point of dot command is replied, and wherein, carries the RSU mark of obtaining in this point-to-point replying.
Pass through the embodiment of the present invention, OBU is setting up specially in link process with RSU, acquiring unit 602 obtains the RSU mark of RSU, OBU with RSU point-to-point communication process in, receiving element 604 receives the point-to-point order that RSU sends, and in the time that determining unit 606 determines that RSU that the RSU mark of carrying in point-to-point order and acquiring unit 602 obtain is marking matched, sent point-to-point the replying that carries OBU mark to RSU by transmitting element 608, the interference that the point-to-point order of having avoided OBU mistake to receive other RSU transmissions causes.
Receive and send out other OBU point-to-point and reply brought interference for fear of RSU mistake, OBU, can also be by the OBU mark notice of OBU to RSU setting up specially in link process with RSU.Therefore, in a preferred implementation of the embodiment of the present invention, as shown in Figure 7, this device can also comprise: notification unit 610, for setting up specially to link process at OBU and RSU, the OBU mark of OBU is notified to RSU.With RSU point-to-point communication process in, before transmitting element 608 sends point-to-point the replying of the point-to-point order receiving to RSU, determining unit 606 can also determine that the RSU mark of carrying in this point-to-point order is marking matched with the RSU obtaining, further, determining unit 606 determines that the OBU mark of carrying in this point-to-point order is marking matched with the OBU of this OBU.By this preferred implementation, OBU with RSU point-to-point communication process in, can confirm that the point-to-point order receiving is the point-to-point order that sends to oneself, make OBU only receive and send the point-to-point order to oneself, avoided OBU mistake to receive the interference that sends to the point-to-point order of other OBU to bring.
In another preferred implementation of the embodiment of the present invention, RSU can send the OBU within the scope of broadcasting command BST query communication, and the RSU that carries RSU in broadcasting command (for example identifies, in antenna unique identification RSUID field in BST, carry the RSU mark of RSU), acquiring unit 602 obtains the RSU mark of RSU from broadcasting command, preferably, OBU can preserve the RSU mark of obtaining.Receiving element 604 is replied to RSU reply beacon table VST by transmitting element 608 after receiving broadcasting command, and in VST, carries OBU unique identification OBUID, and notification unit 610 notifies the OBU mark of this OBU to RSU.RSU receives after the VST that OBU returns, and obtains the OBUID carrying in VST, and preferably, RSU can record the OBU mark with the OBU of RSU link setup.OBU with the RSU point-to-point communication process of this OBU link setup in, the RSU mark of obtaining is carried in point-to-point order, and in point-to-point order, carries the OBU mark of OBU.
After establishing the link, OBU and RSU can carry out point-to-point communication with RSU.For example, RSU can send ACTION order to OBU, and in ACTION order, carries the RSU mark (for example, can carry RSU mark by the application id field IID in ACTION command format) of RSU, and with the OBU mark of the OBU of RSU link setup.Receiving element 604 receives the ACTION order that RSU sends, and receiving after ACTION order, determine that by determining unit 606 the RSU mark of carrying in ACTION order is marking matched with the RSU of record, and the OBU carrying in definite ACTION order mark is marking matched with the OBU of this OBU, trigger transmitting element 608 and return to ACTION to this RSU and reply, complete identification and ETC process of exchange.
RSU is in Transaction Success or in transaction because when the reason Fail Transaction such as data check is made mistakes, receive time-out, PSAM are made mistakes, send and discharge link command to OBU, and the RSU that carries RSU in release link command (for example identifies, can carry RSU mark by the application id field IID discharging in link command form), and with the OBU mark of the OBU of RSU link setup.Receiving element 604 receives and discharges after link command, determining unit 606 determines that discharging the OBU carrying in link command identifies with the OBU of this OBU marking matched, and determine that discharging the RSU carrying in link command identifies with the RSU of record marking matched, OBU discharges the link between RSU, finishes the point-to-point communication with RSU.If the OBU carrying in the release link command that OBU receives mark is not mated with the OBU mark of this OBU, OBU abandons this release link command, or enters dormant state.
Embodiment tri-
For the problem that has monkey chatter in ETC system in correlation technique between OBU and RSU, for RSU and OBU are both identified and the object of own link setup, OBU locks the RSU that finally receives broadcasting command and issue point-to-point order, and the point-to-point order of other antennas and release link command do not receive without exception; RSU judges whether it is the reply to oneself according to receiving the antenna locking information carrying in OBU reply response, if it is receives and continues to process, otherwise abandon.Two-way like this link judgement can be avoided monkey chatter to the full extent, guarantees the success ratio of car.
According to the embodiment of the present invention, a kind of expanded application of utilizing current GB agreement is provided, increase software link judges to avoid the method for monkey chatter.Simultaneously do not affect current GB protocol specification and framework, do not affect the intercommunity of each ETC producer product, guarantee ETC working application.
In embodiments of the present invention, ETC Anneta module (being above-mentioned RSU), is used for being responsible for checking and setting up private link with OBU, completes the ETC transaction of withholing, and reports Transaction Information to track computing machine.ETC label model (being above-mentioned OBU), is used for store car information and e-wallet information, and response RSU order completes the ETC transaction of withholing.
ETC transaction flow can be divided into broadcast link setup, point-to-point specially to link communication and three processes of link release: 1) broadcast link setup process: RSU sends the OBU within the scope of broadcasting command BST query communication, OBU replys beacon table VST and replys, and carries OBU unique identification OBUID in VST.RSU receives after VST, extracts OBUID, and follow-up this OBUID that carries communicates as command header and OBU.In this stage, OBU can respond the BST order of any RSU.2) point-to-pointly specially obtain after OBUID to link communication process: RSU, send ACTION order and OBU and carry out point-to-point communication, complete vehicle identification and process of exchange.In this stage, OBU does not respond the order of not carrying own OBUID.3) link dispose procedure: after completing and going wrong in transaction or process of exchange, RSU sends and discharges link command EndApp order, notifies this OBU closing the transaction.In EndApp order, carry OBUID.
Due in actual applications, whether if two RSU have all completed broadcast link setup process with same OBU, replying for the response that makes can make RSU distinguish OBU transmission at dedicated link communication process is to reply to the response of oneself.Therefore, in a preferred implementation of the present embodiment, in the down order that can also send at RSU, increase antenna unique identification (being RSUID), RSUID is notified to OBU, and OBU increases the unique identification (being RSUID) of the ETC Anneta module that receives this response message in the response message of replying RSU transmission.
In specific implementation process, can in BST order, determine a day wire size, planning RSUID field layering implication, lowest byte is a day wire size, consistent with in ACTION and EndApp order day wire size.In the present embodiment, can utilize in GB agreement, the application id field IID in ACTION command format uses as sky wire size field, represents that this order is which antenna issues.This field is not used in GB interconnects, and does not affect the extendability of agreement; This field is resolved and is followed GB ETC protocol definition, does not utilize the OBU of this field to abandon, and does not therefore also affect protocol interconnection.Utilize in GB agreement, the application id field IID in ACTION response format uses as sky wire size field, represents that this response is replying for which antenna; This field is not used in GB interconnects, and does not affect the extendability of agreement; This field is resolved and is followed GB ETC protocol definition, does not utilize the OBU of this field to abandon, and does not affect protocol interconnection.Utilize in GB agreement, the application id field IID in EndApp command format uses as sky wire size field, represents that this order is which antenna issues.This field is not used in GB interconnects, and does not affect the extendability of agreement; This field is resolved and is followed GB ETC protocol definition, does not utilize the OBU of this field to abandon, and does not affect protocol interconnection.
OBU can record the sky wire size (RSU mark) in the BST that last reception receives, as with the sky wire size (identifying the locking with RSU by RSU) of this OBU link setup.OBU receives after ACTION or EndApp order, and whether check IID field is consistent with the own sky wire size recording, and is reception & disposal, otherwise abandons.RSU receives after ACTION response, and whether check IID field is consistent with own sky wire size itself, is reception & disposal, otherwise abandons.
Fig. 8 is according to the process flow diagram of the communication means of the ETC system of the embodiment of the present invention three, and as shown in Figure 8, the method can comprise following step:
Step S801, RSU sends broadcasting command BST, the OBU within the scope of query communication.
Step S802, OBU receives the broadcasting command that RSU sends, and locks the sky wire size in the up-to-date BTS receiving.
Step S803, after OBU and RSU link setup, if receive the release link EndApp order that RSU sends, OBU compares the sky wire size of carrying in EndApp order with the sky wire size of locking, discharge link OBU if identical and enter dormant state, otherwise OBU abandons EndApp order.
Step S804, after OBU and RSU link setup, if do not receive the release link EndApp order that RSU sends, OBU returns to beacon table VST to RSU and replys.RSU receives the VST that returns of OBU and replys, and judges that whether the sky wire size that this VST carries in replying is identical with the sky wire size of this RSU, if identical, RSU accepts this VST and replied the link setup process in OBU, otherwise RSU abandons this VST and replys.
Step S805, RSU sends point-to-point ACTION order to OBU, carries out ETC transaction with OBU.
Step S806, OBU receives the point-to-point ACTION order that RSU sends, and extracts the IID of point-to-point ACTION order, and with wire size comparison in BST day, if identical, OBU processed to return and replys, otherwise OBU abandons point-to-point ACTION order.
Step S807, if OBU receives the release link EndApp order that RSU sends, OBU compares the sky wire size of carrying in EndApp order with the sky wire size of locking, discharge link OBU and enter dormant state, otherwise OBU abandons EndApp order if identical.
Step S808, does not receive the release link EndApp order that RSU sends, and OBU returns to ACTION to RSU and replys.
Step S809, RSU receives the ACTION that returns of OBU and replys, and judges that whether sky wire size that this ACTION carries in replying is identical with the sky wire size of this RSU, if identical, RSU accepts this ACTION and replys, and proceed processing, otherwise RSU abandons this VST and replys.
Step S810, while completing ETC transaction or Fail Transaction, RSU sends link release command EndApp to OBU.
Step S811, OBU receives, and the link release command that RSU sends, compares the sky wire size of carrying in EndApp order with the sky wire size of locking, discharge link OBU and enter dormant state, otherwise OBU abandons EndApp order, relies on overtime exiting if identical.
Embodiment tetra-
According to the embodiment of the present invention, the RSU unified planning sky wire size (RSUID) of same ETC website, it wire size is consistent with car Taoist monastic name, and each RSU has the sky wire size of oneself as the own unique identification at this website.
As shown in table 1, in broadcasting command BST, be used for the 4 byte RSUID fields of unique identification RSU, carry out hierarchical planning, high byte represents equipment vendors' mark, observes the distribution of Ministry of Communications; Middle two bytes, as section number, represent the unique identification of charge station; Lowest byte is as sky wire size, as this antenna unique identification in this charge station.
Table 1 ACTION command frame expansion instruction card
In VST, do not have extended field to be the reply to which antenna for identifying this VST, exist RSU in BST broadcasting process, to receive the VST of OBU to other antennas, cause this antenna attempt to set up dedicated link with OBU, thereby disturb the possibility of this OBU arm's length transaction flow process.This interference, needs OBU according to the antenna mark of locking, and the ACTION and the EndApp order that shield follow-up non-this antenna mark RSU solve.
The criterion of RSU days wire sizes of OBU locking is: lock last byte of RSUID in last received BST (above-mentioned RSU days wire size); If first ACTION order or the EndApp order of the follow-up reception of this OBU are consistent with this day wire size, reception & disposal, otherwise abandon.Once continue this day wire size of locking after receiving the ACTION order that meets locking day wire size.Lock-out state in broadcast link setup process with receive time-out or again receive that BST finishes; At dedicated link communications status, finish with receive time-out.
As shown in table 2 and table 3, in ACTION command and response, utilize the application ID(IID in GB order structure) as a day wire size.Byte of this field length, can distinguish different application scenarioss by this field, makes DSRC agreement can support different application scenarioss simultaneously, alternately sends the order of different scenes.ETC GB application specifies is only based on application scenarios of ETC, this field not enabled at present.In application, whether this field exists by the indicating bit in ACTION command header is indicated, and for example, 1 of indicating positions represents that this field exists, and is 0 and does not exist.In RSU order, whether whether this field exist this field in the response that determines corresponding OBU to exist, if existed, order is consistent with the IID value of response.In like manner, the IID discharging in link command EndAPP also uses as RSU days wire sizes.
Table 2 ACTION response frame expansion instruction card
Table 3 RSUID field frames expansion instruction card
RSU is in dedicated link communication process, and in ACTION order and EndApp order, in IID value and BST, last byte of RSUID is consistent.
OBU is in dedicated link communication process, judge each reception ACTION order sky wire size with oneself locking sky wire size whether consistent, if consistent, reception & disposal also arranges IID value for locking day wire size in the ACTION response of replying, otherwise abandons this order, relies on receive time-out to exit.
RSU is in dedicated link communication process, and whether the IID of the ACTION response that judgement is received is consistent with the sky wire size of oneself setting, if unanimously continue the processing of follow-up ETC transaction flow, otherwise abandons this response, relies on re-transmission command timeout to exit.
RSU is in Transaction Success or in process of exchange because when a variety of causes Fail Transaction such as data check is made mistakes, receive time-out, PSAM are made mistakes, backstage is overtime, all can send to discharge link command EndApp and finish whole trade link.IID in EndApp is set to a day wire size.
The whole process of exchange of OBU, comprise broadcast link setup process, dedicated link communication process and link dispose procedure, can receive EndApp order and judge that whether IID is consistent with the sky wire size that oneself locks, enter dormant state if unanimously, exit flow process, or if the sky wire size that inconsistent OBU does not also lock is abandoned this order and is not processed.
As can be seen from the above description, the present invention has realized following technique effect:
On the one hand, RSU is special in the process of link with OBU foundation, the RSU mark of this RSU is notified to OBU, OBU with RSU communication process in RSU mark is carried in point-to-point message, thereby RSU only receives RSU mark and identifies consistent point-to-point message with self RSU, thereby the interference of having avoided RSU mistake reception OBU to send to the point-to-point message of other RSU to bring.Further, RSU has obtained the OBU mark with the OBU of RSU link setup, make RSU in the time receiving point-to-point the replying that OBU returns, can determine this point-to-point reply from the OBU of this RSU link setup after be for further processing, and then avoided that RSU mistake receives other OBU point-to-pointly reply brought interference.
On the other hand, OBU is setting up specially in link process with RSU, OBU obtains the RSU mark with the RSU of this OBU link setup, OBU with RSU point-to-point communication process in, can confirm the point-to-point order that receive from the RSU of this OBU link setup, make OBU only receive from the point-to-point order of the RSU of this OBU link setup, avoided OBU mistake to receive the interference bringing from the point-to-point order of other RSU.Further, the OBU mark of OBU is notified to RSU, OBU with RSU point-to-point communication process in, receive the point-to-point order that RSU sends, and in the time determining that the OBU carrying in point-to-point order identifies and the OBU of this OBU is marking matched, point-to-point the replying that carries OBU mark to RSU sending point to dot command, has avoided OBU mistake to receive the interference that sends to the point-to-point order of other OBU to cause.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in memory storage and be carried out by calculation element, and in some cases, can carry out shown or described step with the order being different from herein, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a communication means for electric non-stop toll ETC system, is characterized in that, comprising:
Roadside unit RSU is setting up specially in link process with board units OBU, by the RSU mark notice of described RSU to described OBU;
Described RSU to described OBU sending point to dot command after, receive point-to-point the replying that described OBU returns for described point-to-point order;
Described RSU determines that the RSU mark of carrying in described point-to-point replying is marking matched with the RSU of described RSU, accepts described point-to-point replying.
2. method according to claim 1, is characterized in that,
RSU, setting up specially in link process with OBU, also comprises: described RSU obtains the OBU mark of described OBU;
Described RSU also comprises before accepting described point-to-point replying: described RSU determines that the OBU mark of carrying in described point-to-point replying is marking matched with the described OBU obtaining.
3. method according to claim 2, is characterized in that,
The RSU mark notice of described RSU, to described OBU, being comprised: the OBU within the scope of the broadcasting command query communication that the RSU that described RSU transmission carries described RSU identifies;
Described RSU obtains the OBU mark of described OBU, comprising: described RSU receives the beacon table that described OBU receives the OBU mark that carries described OBU of returning after described broadcasting command and replys.
4. according to the method in any one of claims 1 to 3, it is characterized in that, described point-to-point order comprises: action ACTION order and link discharge EndApp order.
5. a communication means for electric non-stop toll ETC system, is characterized in that, comprising:
Board units OBU, setting up specially in link process with roadside unit RSU, obtains the RSU mark of described RSU;
Described OBU receives the point-to-point order that RSU sends;
Described OBU determines that the RSU mark of carrying in described point-to-point order is marking matched with the described RSU that described OBU obtains, and sends the point-to-point of described point-to-point order reply to described RSU, wherein, carries described RSU mark in described point-to-point replying.
6. method according to claim 5, is characterized in that,
OBU setting up specially in link process with RSU, also comprises: described OBU by the OBU mark notice of described OBU to described RSU;
Described OBU, before sending point-to-point the replying of described point-to-point order to described RSU, also comprises: described OBU determines that the OBU mark of carrying in described point-to-point order is marking matched with the OBU of this OBU.
7. method according to claim 6, is characterized in that,
Described OBU obtains the RSU mark of described RSU, comprising: described OBU receives the broadcasting command of the RSU mark that carries described RSU of described RSU transmission;
The OBU mark notice of described OBU, to described RSU, being comprised: the beacon table that described OBU returns to described RSU the OBU mark that carries described OBU is replied.
8. according to the method described in any one in claim 5 to 7, it is characterized in that, described point-to-point order comprises: action ACTION order and link discharge EndApp order.
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| CN201210510204.0A CN103854317A (en) | 2012-12-04 | 2012-12-04 | Communication method of ETC system |
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| CN104574543A (en) * | 2014-12-31 | 2015-04-29 | 深圳市金溢科技股份有限公司 | Method for performing transaction with OBU and RSU |
| WO2016127895A1 (en) * | 2015-02-10 | 2016-08-18 | 电信科学技术研究院 | Vehicle road information interaction method, device and system |
| WO2017132946A1 (en) * | 2016-02-04 | 2017-08-10 | 华为技术有限公司 | Data transmission method and apparatus |
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| CN111935232A (en) * | 2020-07-13 | 2020-11-13 | 北京聚利科技有限公司 | Vehicle information determination method, device, equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104574543A (en) * | 2014-12-31 | 2015-04-29 | 深圳市金溢科技股份有限公司 | Method for performing transaction with OBU and RSU |
| CN104574543B (en) * | 2014-12-31 | 2017-05-24 | 深圳市金溢科技股份有限公司 | Method for performing transaction with OBU and RSU |
| WO2016127895A1 (en) * | 2015-02-10 | 2016-08-18 | 电信科学技术研究院 | Vehicle road information interaction method, device and system |
| CN105991704A (en) * | 2015-02-10 | 2016-10-05 | 电信科学技术研究院 | Vehicle road information interaction method, device and system thereof |
| CN105991704B (en) * | 2015-02-10 | 2019-04-19 | 电信科学技术研究院 | A kind of bus or train route information interacting method, equipment and system |
| WO2017132946A1 (en) * | 2016-02-04 | 2017-08-10 | 华为技术有限公司 | Data transmission method and apparatus |
| CN110278042A (en) * | 2019-06-25 | 2019-09-24 | 江西省高速公路联网管理中心 | Anti- monkey chatter method and apparatus based on satellite difference positioning |
| CN111935232A (en) * | 2020-07-13 | 2020-11-13 | 北京聚利科技有限公司 | Vehicle information determination method, device, equipment and storage medium |
| CN113784308A (en) * | 2021-07-26 | 2021-12-10 | 北京邮电大学 | Content sharing method and device based on coding cache |
| CN113784308B (en) * | 2021-07-26 | 2024-04-23 | 北京邮电大学 | Content sharing method and device based on coding cache |
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