CN104574533A - Free flow onboard unit concurrent processing method, road side unit and free flow system - Google Patents
Free flow onboard unit concurrent processing method, road side unit and free flow system Download PDFInfo
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
- G07B15/00—Arrangements or apparatus for collecting fares, tolls or entrance fees at one or more control points
- G07B15/06—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems
- G07B15/063—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems using wireless information transmission between the vehicle and a fixed station
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Abstract
The invention provides a free flow onboard unit (OBU) concurrent processing method. A road side unit (RSU) positioned on a path identification point is used for executing the transaction process of each OBU in the coverage range of the RSU in a time-sharing concurrent way, and the transaction process comprises the following steps: A, sending a command of searching the OBU by the RSU in the coverage range of the RSU every preset time, and sending a transaction command corresponding to the current transaction state to the OBU before the sending of the command of searching the OBU every time if the release of the transaction process between the RSU and any one OBU is not completed; B, waiting to receive feedback information against the transaction command and/or the feedback information against the command of searching the OBU by the RSU and updating the transaction state of the corresponding OBU according to the feedback information if the correct feedback information is received. Thus, by adopting the free flow OBU concurrent processing method provided by the invention, the path information identification process of the OBU is accelerated, the working efficiency is improved and the success rate of path identification of the OBU is further improved.
Description
Technical field
The application relates to intelligent transportation field, and particularly one freely flows OBU(board units, On board Unit) concurrent processing method, RSU(roadside unit, Road Side Unit) and free streaming system.
Background technology
In intelligent transportation application, due to general ETC(Electronic Toll Collection, electronic charging system without parking) track all can use track gate, separate one by one the vehicle being mounted with OBU by track, adopt the mode first processing first, sequentially conclude the business when therefore RSU and OBU concludes the business, namely an each RSU and OBU concludes the business, after having concluded the business, track gate is argued, and the vehicle of having concluded the business passes through, and RSU concludes the business with the vehicle arrived below again.
But freely flow in application system at the Multi-path recognition of ETC, ID of trace route path point does not have track gate, cause being loaded with OBU vehicle uncontrollable in the speed through ID of trace route path point, therefore very fast at the car speed of ID of trace route path point process.If have many cars simultaneously at a high speed through out-of-date at ID of trace route path point, continue to adopt first process first, order mode of doing business, then there will be RSU and one of them OBU when concluding the business, do not carry out vehicle belonging to the OBU that concludes the business due to the speed of a motor vehicle too fast, leave ID of trace route path point, and RSU has little time the situation processing corresponding OBU, cause the OBU success flag routing information that RSU cannot guarantee each car.
Visible, freely flow in application system at Multi-path recognition, adopt the mode first processing first, sequentially conclude the business, the success ratio that RSU carries out ID of trace route path to OBU is low.
Summary of the invention
For solving the problems of the technologies described above, the embodiment of the present application provides a kind of and freely flows OBU(board units, On board Unit) concurrent processing method, RSU(roadside unit, Road Side Unit) and free streaming system, OBU routing information identification process is accelerated to reach, the object of increasing work efficiency, technical scheme is as follows:
One freely flows board units OBU concurrent processing method, and the roadside unit RSU being positioned at ID of trace route path point performs the process of exchange of each OBU of its coverage in the mode that timesharing is concurrent, described process of exchange comprises:
A, described RSU send search OBU order every Preset Time in described RSU coverage, if the process of exchange of described RSU and any one OBU has not discharged before each transmission search OBU order, then also send the trade command corresponding with its current stateful transaction to this OBU;
B, described RSU wait-receiving mode, for the feedback information of trade command and/or the feedback information for search OBU order, if receive correct feedback information, then upgrade the stateful transaction of corresponding OBU according to described feedback information.
Preferably, also comprise:
Described RSU sets up the queue of the stateful transaction for depositing OBU;
Upgrade the stateful transaction step of corresponding OBU according to described feedback information, be specially: if there is the stateful transaction of corresponding OBU in queue, then according to feedback information amendment or the stateful transaction deleting corresponding OBU described in described queue; If there is no the stateful transaction of corresponding OBU in queue, then the stateful transaction of newly-built corresponding OBU in queue.
Preferably, when the feedback information of described RSU wait-receiving mode for trade command and/or the feedback information for search OBU order, when not receiving feedback information or receive wrong feedback information, keep the stateful transaction of described OBU in described queue constant.
Preferably, as described in the not change in N section Preset Time of the stateful transaction of OBU in queue, then from described queue, delete the stateful transaction of described OBU, N is preset value, for being greater than the integer of 1.
Preferably, the stateful transaction of described OBU comprises:
Read routing information stateful transaction, write routing information stateful transaction and release OBU stateful transaction;
With described trade command corresponding to routing information stateful transaction of reading for reading routing information trade command; With described trade command corresponding to routing information stateful transaction of writing for writing routing information trade command; With described trade command corresponding to OBU stateful transaction that discharge for discharge OBU trade command.
Preferably, the stateful transaction of described OBU also comprises reads information of vehicles stateful transaction, with described trade command corresponding to information of vehicles stateful transaction of reading for reading information of vehicles trade command.
Preferably, the stateful transaction upgrading corresponding OBU according to described feedback information comprises:
Receiving OBU for the feedback information reading routing information trade command, revising the stateful transaction of described OBU for writing routing information stateful transaction;
Or, receive OBU for the feedback information writing routing information trade command, revise the stateful transaction of described OBU for release OBU stateful transaction;
Or, receive the feedback information of OBU for release OBU trade command, delete the stateful transaction of described OBU;
Or, receiving the feedback information of OBU for search OBU order, setting up the stateful transaction of described OBU for reading routing information stateful transaction.
A kind of roadside unit RSU, perform the process of exchange of each OBU in its coverage for the mode concurrent with timesharing, described RSU comprises: transaction unit;
Described transaction unit comprises:
First transmitting element, OBU order is searched for sending in described RSU coverage every Preset Time, if the process of exchange of described RSU and any one OBU has not discharged before OBU order is searched in each transmission, then also send the trade command corresponding with its current stateful transaction to this OBU;
Updating block, wait-receiving mode, for the feedback information of trade command and/or the feedback information for search OBU order, if receive correct feedback information, then upgrades the stateful transaction of corresponding OBU according to described feedback information.
Preferably, also comprise:
Set up unit, for setting up the queue of the stateful transaction for depositing OBU;
Described updating block comprises: first upgrades subelement, if for there being the stateful transaction of corresponding OBU in queue, then according to feedback information amendment or the stateful transaction deleting corresponding OBU in described queue;
Second upgrades subelement, if for there is no the stateful transaction of corresponding OBU in queue, then and the stateful transaction of newly-built corresponding OBU in queue.
Preferably, also comprise:
Holding unit, for when wait-receiving mode is for the feedback information of trade command and/or the feedback information for search OBU order, when not receiving feedback information or receive wrong feedback information, keep the stateful transaction of described OBU in described queue constant.
Preferably, also comprise:
Delete cells, for as described in the not change in N section Preset Time of the stateful transaction of OBU in queue, then from described queue, delete the stateful transaction of described OBU, N is preset value, for being greater than the integer of 1.
A kind of free streaming system, comprises RSU and OBU as described in above-mentioned any one;
Described OBU is for responding the trade command of described RSU and the feedback information returned for trade command.
The application is owing to being provided with the record of stateful transaction and the mechanism of renewal to OBU, therefore RSU can have a clear understanding of the stateful transaction of each OBU at any time, thus can perform the process of exchange of each OBU in the mode that timesharing is concurrent.Compared with prior art, accelerate OBU routing information identification process, improve work efficiency, thus improve the success ratio of OBU being carried out to ID of trace route path.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present application, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of sub-process figure of the free stream board units OBU concurrent processing method that the application provides;
Fig. 2 is the another kind of sub-process figure of the free stream board units OBU concurrent processing method that the application provides;
Fig. 3 is a kind of transaction flow schematic diagram of RSU and the OBU that the application provides;
Fig. 4 is a kind of structural representation of the roadside unit RSU that the application provides;
Fig. 5 is the another kind of structural representation of the roadside unit RSU that the application provides;
Fig. 6 is a kind of structural representation of the electronic charging system without parking ETC that the application provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, be clearly and completely described the technical scheme in the embodiment of the present application, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the application's protection.
Embodiment one
In the present embodiment, provide one and freely flow OBU(board units, On board Unit) concurrent processing method, be positioned at the roadside unit RSU of ID of trace route path point, based on the record to the stateful transaction of each OBU in described RSU coverage, the process of exchange of each OBU in described RSU coverage is performed in the mode that timesharing is concurrent, wherein, the process of exchange of each OBU in described RSU coverage is performed in the mode that timesharing is concurrent, namely in a period of time, transaction in described RSU and RSU coverage between multiple OBU be all in startup optimization to operation complete between.
Wherein, the process of exchange performing each OBU in described RSU coverage in the mode that timesharing is concurrent can see Fig. 1, Fig. 1 shows the free stream OBU(board units that the application provides, On board Unit) a kind of sub-process figure of concurrent processing method, can comprise the following steps:
Step S11:RSU sends search OBU order every Preset Time in described RSU coverage, if the process of exchange of described RSU and any one OBU has not discharged before each transmission search OBU order, then also send the trade command corresponding with its current stateful transaction to this OBU.
Wherein, search OBU order can send before trade command, also can be send after trade command, can also intert to send among trade command.
Step S12: described RSU wait-receiving mode is for the feedback information of trade command and/or the feedback information for search OBU order, if receive correct feedback information, the stateful transaction of corresponding OBU is then upgraded according to described feedback information, wherein, each OBU returns the feedback information for trade command or search OBU order.
The application is owing to being provided with the record of stateful transaction and the mechanism of renewal to OBU, therefore RSU can have a clear understanding of the stateful transaction of each OBU at any time, thus can perform the process of exchange of each OBU in the mode that timesharing is concurrent.Compared with prior art, accelerate OBU routing information identification process, improve work efficiency, thus improve the success ratio of OBU being carried out to ID of trace route path.Such as, only having the situation of 1 RSU, in prior art, RSU adopts first first process, order mode of doing business, there are 3 cars being loaded with OBU to pass through simultaneously, RSU completes and carries out ID of trace route path exchange hour to an OBU and probably need 150ms, and the routing information that so sequence identification completes 3 OBU at least needs 450ms.The mode that the timesharing adopting the application to propose is concurrent, each RSU sends out trade command, the response of concurrent wait 3 OBU to 3 OBU, and the mark completing a routing information is like this exactly probably 150ms.The visible ETC Multi-path recognition there is many cars high-speed parallel freely flows in application system, and the free stream board units OBU routing information identification method adopting the application to provide greatly increases the mark success ratio of OBU routing information.
In the free streaming system of ETC, it is topmost technical indicator that RSU carries out routing information mark success ratio to OBU.Whether the height of success ratio determines the free streaming system of ETC and can apply in intelligent transportation field.The application achieves simultaneously through the OBU success flag routing information of each car of ID of trace route path point, substantially increases RSU carries out routing information mark success ratio to OBU.
RSU carries out the raising of routing information mark success ratio to OBU, and the free streaming system of ETC is applied in intelligent transportation field.Instead of the construction of beacon station, greatly reduce the input of manpower and materials.Will stopping through beacon station with car owner in the past, swipe the card can at a high speed through identification point unlike, car owner, very convenient, substantially increases the satisfaction of Consumer's Experience.
Embodiment two
In the present embodiment, OBU(board units freely being flowed, On board Unit to embodiment one) implementation that is recorded in the stateful transaction of described RSU coverage each OBU interior in concurrent processing method limits.
Concrete, described RSU, before the mode concurrent with timesharing performs the process of exchange of each OBU in described RSU coverage, performs the step of the queue of the stateful transaction set up for depositing OBU.The described step setting up queue also just can be set up when needs use.
The queue that described RSU sets up is for depositing the stateful transaction of OBU.
In the present embodiment, in queue, element can be designed as following form: OBU_ID+TRAND_STATE.OBU_ID is No. ID of OBU, and TRAND_STATE is stateful transaction.
Based on the queue of the stateful transaction for depositing OBU that described RSU sets up, in the present embodiment, the stateful transaction of OBU is recorded in the queue that RSU sets up, wherein, the detailed process upgrading the stateful transaction of corresponding OBU according to described feedback information can see Fig. 2, Fig. 2 shows the another kind of sub-process figure of the concurrent processing method of the free stream board units OBU that the application provides, and can comprise the following steps:
Step S21: judge the stateful transaction whether having corresponding OBU in queue.
When judged result is the stateful transaction having corresponding OBU in queue, perform step S22, otherwise, perform step S23.
Step S22: according to feedback information amendment or the stateful transaction deleting corresponding OBU in described queue.
The concrete mode upgrading the stateful transaction of each OBU in described queue is: delete the original stateful transaction of each OBU, only retains the stateful transaction after upgrading, has saved between queue empty.
Step S23: the stateful transaction of newly-built corresponding OBU in queue.
Judge the stateful transaction not having corresponding OBU in queue, that is the feedback information of OBU is for search OBU order feedback, then in queue, set up the stateful transaction of corresponding OBU.
In the present embodiment, when the feedback information of RSU wait-receiving mode for trade command and/or the feedback information for search OBU order, when not receiving feedback information or receive wrong feedback information, keep the stateful transaction of described OBU in described queue constant.
Certainly, in the present embodiment, when the feedback information of RSU wait-receiving mode for trade command and/or the feedback information for search OBU order, when not receiving feedback information or receive wrong feedback information, keep the stateful transaction of described OBU in described queue constant, and continue when next time sends to send the feedback information that do not receive or receive trade command corresponding to the feedback information of mistake to OBU, if the stateful transaction of described OBU in queue be not change in N section Preset Time, from described queue, then delete the stateful transaction of described OBU, N is preset value, for being greater than the integer of 1.
Preset value N can set according to the actual requirements, does not limit at this to the concrete numerical value of preset value N.
Delete the stateful transaction of described OBU from described queue after, between release queue empty.
When the feedback information of RSU wait-receiving mode for trade command and/or the feedback information for search OBU order, when not receiving feedback information or receive wrong feedback information, the stateful transaction that the stateful transaction of described OBU in described queue is constant and described OBU is in queue if keep is not change in N section Preset Time, then the exception handling carried out at RSU and OBU in process of exchange that the stateful transaction deleting described OBU from described queue provides for the application.
In this application, the RSU being positioned at ID of trace route path point will after sending search OBU order, after receiving the feedback information of corresponding OBU for search OBU order, multiple independently transaction step is split into the process of exchange of corresponding OBU, and the corresponding stateful transaction of each transaction step, RSU performs corresponding transaction step according to the stateful transaction of the OBU of record.
It should be noted that, the process splitting into multiple independently transaction step is non-physical fractionation, but virtual fractionation.
It should be noted that, OBU itself can't mark oneself stateful transaction, and the stateful transaction of the OBU mentioned in this application is the state that RSU names for the transaction step split by process of exchange.
Wherein RSU by after receiving the feedback information of any one OBU for search OBU order, can split into 3 independently steps with the process of exchange of this OBU.
Stateful transaction corresponding to wherein 3 independently steps, and each step can see table:
| Sequence number | Step | Stateful transaction (TRAND_STATE) |
| 1 | Read routing information | GET_ROUTE_INFO |
| 2 | Write routing information | SET_ROUTE_INFO |
| 3 | Release OBU | SET_EVENT_REPORT |
Wherein, GET_ROUTE_INFO is used for expression and reads routing information stateful transaction, and SET_ROUTE_INFO is used for expression and writes routing information stateful transaction, and SET_EVENT_REPORT is for representing release OBU stateful transaction.
As seen from the above table, RSU is after receiving the feedback information of any one OBU for search OBU order, and the process of exchange between this OBU performs according to above-mentioned steps, and the step that RSU performs is followed successively by and reads routing information, write routing information, discharge OBU.
With described trade command corresponding to routing information stateful transaction of reading for reading routing information trade command; With described trade command corresponding to routing information stateful transaction of writing for writing routing information trade command; With described trade command corresponding to OBU stateful transaction that discharge for discharge OBU trade command.
The described state that to read routing information stateful transaction be described RSU records after receiving the feedback information for search OBU order that described OBU returns, the described feedback information for search OBU order is that described OBU is in the information receiving the rear transmission of search OBU order that described RSU sends.
Described to write routing information stateful transaction be described RSU receive that described OBU returns for the state recorded after reading the feedback information of routing information trade command, the described feedback information for reading routing information trade command be described OBU receive that described RSU sends read routing information trade command after the information that sends.
Described release OBU stateful transaction be described RSU receive that described OBU returns for the state recorded after writing the feedback information of routing information trade command, the described feedback information for writing routing information trade command be described OBU receive that described RSU sends write routing information trade command after the information that sends.
Concrete, the trade command corresponding see above-mentioned 3 stateful transactions, 3 stateful transactions and the feedback information for trade command, the process upgrading the stateful transaction of corresponding OBU according to described feedback information comprises:
Receiving OBU for the feedback information reading routing information trade command, revising the stateful transaction of described OBU for writing routing information stateful transaction;
Or, receive OBU for the feedback information writing routing information trade command, revise the stateful transaction of described OBU for release OBU stateful transaction;
Or, receive the feedback information of OBU for release OBU trade command, delete the stateful transaction of described OBU;
Or, receiving the feedback information of OBU for search OBU order, setting up the stateful transaction of described OBU for reading routing information stateful transaction.
In addition, the trade command corresponding see above-mentioned 3 stateful transactions, 3 stateful transactions and the feedback information for trade command, based on the queue of the stateful transaction for depositing OBU that RSU sets up, the process upgrading the stateful transaction of corresponding OBU according to described feedback information is specifically as follows:
Receiving OBU for the feedback information reading routing information trade command, revising the stateful transaction of described OBU in queue for writing routing information stateful transaction;
Or, receive OBU for the feedback information writing routing information trade command, revise the stateful transaction of described OBU in queue for release OBU stateful transaction;
Or, receive the feedback information of OBU for release OBU trade command, delete the stateful transaction of described OBU in queue;
Or, receiving the feedback information of OBU for search OBU order, setting up the stateful transaction of described OBU in queue for reading routing information stateful transaction.
Certainly, wherein RSU by after receiving the feedback information of any one OBU for search OBU order, can split into 4 independently steps with the process of exchange of this OBU.
Stateful transaction corresponding to wherein 4 independently steps, and each step can see table:
| Sequence number | Step | Stateful transaction (TRAND_STATE) |
| 1 | Read information of vehicles | GET_SECURE |
| 2 | Read routing information | GET_ROUTE_INFO |
| 3 | Write routing information | SET_ROUTE_INFO |
| 4 | Release OBU | SET_EVENT_REPORT |
Wherein, GET_SECURE is used for expression and reads information of vehicles stateful transaction, GET_ROUTE_INFO is used for expression and reads routing information stateful transaction, and SET_ROUTE_INFO is used for expression and writes routing information stateful transaction, and SET_EVENT_REPORT is for representing release OBU stateful transaction.
As seen from the above table, RSU is after receiving the feedback information of any one OBU for search OBU order, and the process of exchange between this OBU performs according to above-mentioned steps, the step that RSU performs is followed successively by and reads information of vehicles, read routing information, write routing information, discharge OBU.
With described trade command corresponding to information of vehicles stateful transaction of reading for reading information of vehicles trade command; With described trade command corresponding to routing information stateful transaction of reading for reading routing information trade command; With described trade command corresponding to routing information stateful transaction of writing for writing routing information trade command; With described trade command corresponding to OBU stateful transaction that discharge for discharge OBU trade command.
The described state that to read information of vehicles stateful transaction be described RSU records after receiving the feedback information for search OBU order that described OBU returns, the described feedback information for search OBU stateful transaction is the information that described OBU sends after receiving the search OBU trade command of described RSU transmission.
Described to read routing information stateful transaction be described RSU receive that described OBU returns for the state recorded after reading the feedback information of information of vehicles trade command, the described feedback information for reading information of vehicles trade command be described OBU receive that described RSU sends read information of vehicles trade command after the information that sends.
Described to write routing information stateful transaction be described RSU receive that described OBU returns for the state recorded after reading the feedback information of routing information trade command, the described feedback information for reading routing information trade command be described OBU receive that described RSU sends read routing information trade command after the information that sends.
Described release OBU stateful transaction be described RSU receive that described OBU returns for the state recorded after writing the feedback information of routing information trade command, the described feedback information for writing routing information trade command be described OBU receive that described RSU sends write routing information trade command after the information that sends.
Concrete, see RSU process of exchange is split as 4 independently step time, the trade command that 4 corresponding stateful transactions, 4 stateful transactions are corresponding and the feedback information for trade command, the process upgrading the stateful transaction of corresponding OBU according to described feedback information comprises:
Receiving OBU for the feedback information reading information of vehicles trade command, upgrading the stateful transaction of described OBU in queue for reading routing information stateful transaction;
Or, receiving OBU for the feedback information reading routing information trade command, revising the stateful transaction of described OBU for writing routing information stateful transaction;
Or, receive OBU for the feedback information writing routing information trade command, revise the stateful transaction of described OBU for release OBU stateful transaction;
Or, receive the feedback information of OBU for release OBU trade command, delete the stateful transaction of described OBU;
Or, receiving the feedback information of OBU for search OBU order, setting up the stateful transaction of described OBU for reading information of vehicles stateful transaction.
In conjunction with RSU process of exchange is split as 4 independently step time, the trade command that 4 corresponding stateful transactions, 4 stateful transactions are corresponding and the feedback information for trade command, the process that OBU described in citing subtend sends the trade command corresponding with its stateful transaction is described.Such as, the OBU concluded the business with RSU is respectively OBU0 and OBU1, if the stateful transaction of OBU0 is for reading vehicle information states (GET_SECURE), then RSU to OBU0 send with OBU0 read vehicle information states (GET_SECURE) corresponding read information of vehicles trade command.If the stateful transaction of OBU1 is for reading routing information state (GET_ROUTE_INFO), then RSU sends to OBU1 and corresponding with the routing information state of reading (GET_ROUTE_INFO) of OBU1 reads routing information trade command.
In conjunction with RSU process of exchange is split as 4 independently step time, the trade command that 4 corresponding stateful transactions, 4 stateful transactions are corresponding and the feedback information for trade command, to RSU after receiving the feedback information of any one OBU for search OBU order, and the process of exchange between this OBU is described.First for an OBU, such as RSU is after transmission search OBU order, receive the feedback information of OBU0 for search OBU order, the stateful transaction of OBU0 is then updated to and reads information of vehicles stateful transaction by RSU, next time send time RSU to OBU0 send with OBU0 read information of vehicles stateful transaction corresponding read information of vehicles trade command; If RSU receive that OBU0 returns for the feedback information reading information of vehicles trade command, the stateful transaction of OBU0 is then updated to and reads routing information stateful transaction by RSU, when next time sends RSU to OBU0 send with OBU0 read routing information stateful transaction corresponding read routing information trade command; If RSU receive that OBU0 returns for the feedback information reading routing information trade command, the stateful transaction of OBU0 is then updated to and writes routing information stateful transaction by RSU, when next time sends RSU to OBU0 send with OBU0 write routing information stateful transaction corresponding write routing information trade command; If RSU receive that OBU0 returns for the feedback information writing routing information trade command, the stateful transaction of OBU0 is then updated to release OBU stateful transaction by RSU, and when next time sends, RSU sends the release OBU trade command corresponding with the release OBU stateful transaction of OBU0 to OBU0; If RSU receives the feedback information of OBU0 for release OBU trade command, delete the stateful transaction of described OBU0.
When RSU receives the feedback information for release OBU trade command that OBU0 returns, RSU terminates the process of exchange with OBU0, completes and identifies the routing information of OBU0.
RSU is from sending search OBU order, receiving the feedback information of corresponding OBU for search OBU order, and after receiving the feedback information of corresponding OBU for search OBU order, and the process of exchange between this OBU can show a kind of transaction flow schematic diagram of RSU and the OBU that the application provides see Fig. 3, Fig. 3.
In addition, see RSU process of exchange is split as 4 independently step time, the trade command that 4 corresponding stateful transactions, 4 stateful transactions are corresponding and the feedback information for trade command, based on the queue of the stateful transaction for depositing OBU that RSU sets up, the process upgrading the stateful transaction of corresponding OBU according to described feedback information is specifically as follows:
Receiving OBU for the feedback information reading information of vehicles trade command, revising the stateful transaction of described OBU in queue for reading routing information stateful transaction;
Or, receiving OBU for the feedback information reading routing information trade command, revising the stateful transaction of described OBU in queue for writing routing information stateful transaction;
Or, receive OBU for the feedback information writing routing information trade command, revise the stateful transaction of described OBU in queue for release OBU stateful transaction;
Or, receive the feedback information of OBU for release OBU trade command, delete the stateful transaction of described OBU in queue;
Or, receiving the feedback information of OBU for search OBU order, setting up the stateful transaction of described OBU in queue for reading information of vehicles stateful transaction.
For aforesaid each embodiment of the method, in order to simple description, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the application is not by the restriction of described sequence of movement, because according to the application, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in instructions all belongs to preferred embodiment, and involved action and module might not be that the application is necessary.
Embodiment three
Corresponding with said method embodiment, this application provides a kind of roadside unit RSU, refer to Fig. 4, Fig. 4 shows a kind of structural representation of the roadside unit RSU that the application provides, roadside unit RSU is used for the process of exchange performing each OBU in its coverage in the mode that timesharing is concurrent, roadside unit RSU comprises: transaction unit 41, and unit 41 of wherein concluding the business comprises the first transmitting element 411 and updating block 412.
First transmitting element 411, OBU order is searched for sending in described RSU coverage every Preset Time, if the process of exchange of described RSU and any one OBU has not discharged before OBU order is searched in each transmission, then also send the trade command corresponding with its current stateful transaction to this OBU;
Updating block 412, wait-receiving mode is for the feedback information of trade command and/or the feedback information for search OBU order, if receive correct feedback information, the stateful transaction of corresponding OBU is then upgraded according to described feedback information, wherein, each OBU returns the feedback information for trade command or search OBU order.
Embodiment four
In the present embodiment, the basis of the roadside unit RSU shown in Fig. 4 expands another roadside unit RSU, refer to Fig. 5, it illustrates the another kind of structural representation of the roadside unit RSU that the application provides, the basis of Fig. 4 also comprises: set up unit 51.
Set up unit 51, for setting up the queue of the stateful transaction for depositing OBU.
In the present embodiment, updating block 412 specifically can comprise: first upgrades subelement and second upgrades subelement,
First upgrades subelement, if for there being the stateful transaction of corresponding OBU in queue, then according to feedback information amendment or the stateful transaction deleting corresponding OBU in described queue.
Second upgrades subelement, if for there is no the stateful transaction of corresponding OBU in queue, then and the stateful transaction of newly-built corresponding OBU in queue.
Roadside unit RSU shown in Fig. 5 can also comprise: holding unit, for when wait-receiving mode is for the feedback information of trade command and/or the feedback information for search OBU order, when not receiving feedback information or receive wrong feedback information, keep the stateful transaction of described OBU in described queue constant.
Roadside unit RSU shown in Fig. 5 can also comprise: delete cells, for as described in the not change in N section Preset Time of the stateful transaction of OBU in queue, then from described queue, delete the stateful transaction of described OBU, N is preset value, for being greater than the integer of 1.
Embodiment five
In the present embodiment, provide a kind of free streaming system, refer to Fig. 6, Fig. 6 shows a kind of structural representation of the free streaming system that the application provides, and free streaming system comprises: RSU61 and OBU62.The concrete structure of RSU61 and function and embodiment three are identical with RSU involved in embodiment four, specifically can see embodiment three and embodiment four.
Described OBU62 is for responding the trade command of described RSU61 and the feedback information returned for trade command.
It should be noted that, each embodiment in this instructions all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.For device class embodiment, due to itself and embodiment of the method basic simlarity, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
For convenience of description, various unit is divided into describe respectively with function when describing above device.Certainly, the function of each unit can be realized in same or multiple software and/or hardware when implementing the application.
Above free stream board units concurrent processing method, roadside unit and free streaming system that the application provides are described in detail, apply specific case herein to set forth the principle of the application and embodiment, the explanation of above embodiment is just for helping method and the core concept thereof of understanding the application; Meanwhile, for one of ordinary skill in the art, according to the thought of the application, all will change in specific embodiments and applications, in sum, this description should not be construed as the restriction to the application.
Claims (12)
1. freely flow a board units OBU concurrent processing method, it is characterized in that, the roadside unit RSU being positioned at ID of trace route path point performs the process of exchange of each OBU of its coverage in the mode that timesharing is concurrent, described process of exchange comprises:
A, described RSU send search OBU order every Preset Time in described RSU coverage, if the process of exchange of described RSU and any one OBU has not discharged before each transmission search OBU order, then also send the trade command corresponding with its current stateful transaction to this OBU;
B, described RSU wait-receiving mode, for the feedback information of trade command and/or the feedback information for search OBU order, if receive correct feedback information, then upgrade the stateful transaction of corresponding OBU according to described feedback information.
2. method according to claim 1, is characterized in that, also comprises:
Described RSU sets up the queue of the stateful transaction for depositing OBU;
Upgrade the stateful transaction step of corresponding OBU according to described feedback information, be specially: if there is the stateful transaction of corresponding OBU in queue, then according to feedback information amendment or the stateful transaction deleting corresponding OBU described in described queue; If there is no the stateful transaction of corresponding OBU in queue, then the stateful transaction of newly-built corresponding OBU in queue.
3. method according to claim 2, it is characterized in that, when the feedback information of described RSU wait-receiving mode for trade command and/or the feedback information for search OBU order, when not receiving feedback information or receive wrong feedback information, keep the stateful transaction of described OBU in described queue constant.
4. method according to claim 2, is characterized in that, as described in the not change in N section Preset Time of the stateful transaction of OBU in queue, then from described queue, delete the stateful transaction of described OBU, N is preset value, for being greater than the integer of 1.
5. the method according to claim 1-4 any one, is characterized in that, the stateful transaction of described OBU comprises:
Read routing information stateful transaction, write routing information stateful transaction and release OBU stateful transaction;
With described trade command corresponding to routing information stateful transaction of reading for reading routing information trade command; With described trade command corresponding to routing information stateful transaction of writing for writing routing information trade command; With described trade command corresponding to OBU stateful transaction that discharge for discharge OBU trade command.
6. method according to claim 5, is characterized in that, the stateful transaction of described OBU also comprises reads information of vehicles stateful transaction, with described trade command corresponding to information of vehicles stateful transaction of reading for reading information of vehicles trade command.
7. method according to claim 5, is characterized in that, the stateful transaction upgrading corresponding OBU according to described feedback information comprises:
Receiving OBU for the feedback information reading routing information trade command, revising the stateful transaction of described OBU for writing routing information stateful transaction;
Or, receive OBU for the feedback information writing routing information trade command, revise the stateful transaction of described OBU for release OBU stateful transaction;
Or, receive the feedback information of OBU for release OBU trade command, delete the stateful transaction of described OBU;
Or, receiving the feedback information of OBU for search OBU order, setting up the stateful transaction of described OBU for reading routing information stateful transaction.
8. a roadside unit RSU, is characterized in that, performs the process of exchange of each OBU in its coverage for the mode concurrent with timesharing, and described RSU comprises: transaction unit;
Described transaction unit comprises:
First transmitting element, OBU order is searched for sending in described RSU coverage every Preset Time, if the process of exchange of described RSU and any one OBU has not discharged before OBU order is searched in each transmission, then also send the trade command corresponding with its current stateful transaction to this OBU;
Updating block, wait-receiving mode, for the feedback information of trade command and/or the feedback information for search OBU order, if receive correct feedback information, then upgrades the stateful transaction of corresponding OBU according to described feedback information.
9. RSU according to claim 8, is characterized in that, also comprises:
Set up unit, for setting up the queue of the stateful transaction for depositing OBU;
Described updating block comprises: first upgrades subelement, if for there being the stateful transaction of corresponding OBU in queue, then according to feedback information amendment or the stateful transaction deleting corresponding OBU in described queue;
Second upgrades subelement, if for there is no the stateful transaction of corresponding OBU in queue, then and the stateful transaction of newly-built corresponding OBU in queue.
10. RSU according to claim 9, is characterized in that, also comprises:
Holding unit, for when wait-receiving mode is for the feedback information of trade command and/or the feedback information for search OBU order, when not receiving feedback information or receive wrong feedback information, keep the stateful transaction of described OBU in described queue constant.
11. RSU according to claim 9, is characterized in that, also comprise:
Delete cells, for as described in the not change in N section Preset Time of the stateful transaction of OBU in queue, then from described queue, delete the stateful transaction of described OBU, N is preset value, for being greater than the integer of 1.
12. 1 kinds of free streaming systems, is characterized in that, comprise RSU and OBU as described in claim 8-11 any one;
Described OBU is for responding the trade command of described RSU and the feedback information returned for trade command.
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