CN104835205A - Multi-antenna processing method and device under free flow and RSU - Google Patents
Multi-antenna processing method and device under free flow and RSU Download PDFInfo
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- CN104835205A CN104835205A CN201510070673.9A CN201510070673A CN104835205A CN 104835205 A CN104835205 A CN 104835205A CN 201510070673 A CN201510070673 A CN 201510070673A CN 104835205 A CN104835205 A CN 104835205A
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- obu
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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
Abstract
The present invention provides a multi-antenna processing method and device under free flow and an RSU. According to the application, after a current RSU establishes a transaction with an OBU, an RSU adjacent to the current RSU is most likely to cause interference for the OBU, and then effectiveness of a random number can be affected. As a result, according to the application, before an encrypted write operation is performed for the OBU through the obtained random number, a transaction process of the RSU adjacent to the current RSU is at least suspended, then the current RSU or other RSU utilizes the random number to perform encrypted write operation for the OBU, after the encrypted write operation is successful, the effectiveness of the random number cannot be affected by the transaction process of the other RSU, thus the suspended transaction process of the RSU can be continued at the moment. According to the application, there is no RSU affecting the effectiveness of the random number used in an encryption process, thus the OBU cannot be locked when the random number is utilized for performing an encryption operation for the OBU, thereby improving a transaction success rate and facilitating use of a user.
Description
Technical field
The present invention relates to communication technical field, particularly relate to one and freely flow down multiple antennas disposal route, device and RSU.
Background technology
In the free streaming system of ETC, in order to improve mark success ratio and efficiency, a track is installed one even two RSU and OBU conclude the business, in order to can concurrent processing OBU, the different RSU of synchronization may simultaneously to identical OBU process.In the process of exchange of a RSU and OBU, RSU needs get random number to OBU and be encrypted write operation, after a certain RSU (hereinafter referred to as RSU*) gets random number to OBU, when preparing to be encrypted write operation to OBU, another RSU and OBU concludes the business, OBU then can respond the transaction of another RSU, and think that random number that RSU* gets is invalid, now RSU* does not know got random number and lost efficacy, also can continue to utilize invalid random number to be encrypted write operation to OBU, lost efficacy due to random number so encrypt write operation failure, cause OBU by pintle hook lock.
So when being encrypted write operation to OBU in prior art, easily produce pintle hook lock problem, and OBU is by after pintle hook lock, user normally cannot use OBU, needs user to cause great inconvenience to publisher's process to use.
Summary of the invention
The invention provides and a kind of freely flow down multiple antennas disposal route, device and RSU, can solving in free streaming system is interfered when encrypting write operation OBU causes the problem of OBU pintle hook lock, to improve Transaction Success rate and to be user-friendly to.
To achieve these goals, present invention employs following technological means:
Freely flow down a disposal route for multiple antennas, be applied to and freely flow down multiple antennas disposal system, described system comprises RSU unit and OBU, and described RSU unit comprises the multiple RSU be connected with each other by network, and described method comprises:
Before being encrypted write operation to described OBU, in described RSU unit, at least suspend the process of exchange of the RSU adjacent with current RSU, wherein said current RSU is the RSU established the link with described OBU;
Described RSU unit utilizes the random number obtained to be encrypted write operation to described OBU;
After described RSU unit encrypts write operation success to described OBU, recover the process of exchange of paused RSU.
Preferably, described before being encrypted write operation to described OBU, the process of exchange at least suspending two RSUs adjacent with current RSU in described RSU unit comprises:
Get before random number operates after described current RSU and described OBU establishes the link, to described OBU, described current RSU is at least shared to the RSU adjacent with described current RSU by establishing the link operation, and the RSU establishing the link operation described in sharing all suspends trading process; Or
When described current RSU utilize get random number order random number operation is got to described OBU time, described random number operational order of getting at least is shared to the RSU adjacent with described current RSU by described current RSU, and the RSU getting random number operational order described in sharing all suspends trading process; Or
When described current RSU utilize get random number order random number successful operation is got to described OBU after, write operation is encrypted to described OBU before, described current RSU is at least shared to the RSU adjacent with described current RSU by getting the order of random number successful operation, and the RSU getting the order of random number successful operation described in sharing all suspends trading process.
Preferably, the process of RSU unit acquisition random number comprises:
When getting before random number operates described in employing after described current RSU and described OBU establishes the link, to described OBU, described current RSU is at least shared to the RSU adjacent with described current RSU by establishing the link operation, the RSU establishing the link operation described in sharing all suspend trading process steps time, all acquisitions establish the link arbitrary RSU in the RSU of operation and get random number operation to described OBU execution, after RSU gets random number successful operation, obtain random number; Described random number is shared to the RSU that all acquisitions establish the link operation by the RSU getting random number successful operation; Or
When adopt described when described current RSU utilize get random number order to described OBU get random number operate time, described random number operational order of getting at least is shared to the RSU adjacent with described current RSU by described current RSU, the RSU getting random number operational order described in sharing all suspend trading process steps time, all acquisitions are got arbitrary RSU in the RSU of random number operational order and are got random number operation to described OBU execution, and random number is shared to the RSU that random number operational order is got in all acquisitions by the RSU getting random number successful operation.
Preferably, the random number that described RSU unit utilization obtains is encrypted write operation to described OBU and comprises:
Described RSU unit judgement described OBU meet pre-conditioned after, utilize described random number to be encrypted write operation to described OBU, in wherein said RSU unit, arbitrary RSU gets the RSU of random number successful operation or the RSU of shared random number.
Preferably, after described RSU unit encrypts write operation success to described OBU, the process of exchange recovering paused RSU comprises:
Encryption write operation success command is shared to by the successful RSU of OBU encryption write operation to the RSU of all acquisition random numbers;
The RSU of all processes of suspending trading, when receiving the encryption write operation success command shared, all recovers the process of exchange before suspending.
Preferably, also comprise:
RSU does not search described OBU when getting random number to described OBU, then the next RSU of sequence trigger switch continues to get random number operation until get random number success to described OBU chronologically.
Preferably, also comprise:
After described OBU encrypts write operation failure, time and the OBU mark correspondence of described OBU being encrypted write operation failure are saved in default queue.
Preferably, judge that described OBU meets pre-conditioned process and comprises:
Judge whether described OBU mark is present in described default queue;
When described OBU mark is not present in described default queue, then judgement meets pre-conditioned;
When described OBU mark is present in described default queue, then judge whether the holding time of described OBU in described default queue is greater than default life span;
Be greater than described default life span when the described holding time, then judgement meets pre-conditioned;
Be not more than described default life span when the described holding time, then judge not meet pre-conditioned.
Freely flow down a treating apparatus for multiple antennas, be applied to and freely flow down multiple antennas disposal system, described system comprises RSU unit and OBU, and described RSU unit comprises the multiple RSU be connected with each other by network, comprising:
Suspend unit, for before being encrypted write operation to described OBU, in described RSU unit, at least suspend the process of exchange of two RSUs adjacent with current RSU, wherein said current RSU is the RSU established the link with described OBU;
Ciphering unit, utilizes the random number obtained to be encrypted write operation to described OBU for described RSU unit;
Recovery unit, after encrypting write operation success at described RSU unit to described OBU, recovers the process of exchange of paused RSU.
A kind of RSU, for freely flowing down multiple antennas disposal system, described system comprises RSU unit and OBU, and described RSU unit comprises the multiple RSU be connected with each other by network, and described RSU comprises as the above-mentioned treating apparatus freely flowing down multiple antennas.
The invention provides one and freely flow down multiple antennas disposal route, device and RSU, the application is after current RSU and OBU sets up transaction, the RSU adjacent with current RSU has maximum possible to produce OBU to disturb, and then affect the validity of random number, so the application has obtained before random number is encrypted write operation to OBU in utilization, at least suspend the process of exchange with current RSU adjacent R SU, then current RSU or other RSU utilizes random number to be encrypted write operation to OBU, after the success of encryption write operation, the process of exchange of other RSU just can not affect the validity of random number, so the process of exchange of paused RSU now can be recovered.
Owing to disturbing the validity of the random number used in ciphering process without RSU in the application, OBU can not be caused by pintle hook lock so utilize random number to be encrypted operation to OBU, thus improve Transaction Success rate and be user-friendly to.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, 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 process flow diagram freely flowing down multiple antennas disposal route disclosed in the embodiment of the present invention;
Fig. 2 is a kind of middle RSU coverage area diagram freely flowing down multiple antennas disposal route disclosed in the embodiment of the present invention;
Fig. 3 is the process flow diagram that disclosed in the embodiment of the present invention, another freely flows down multiple antennas disposal route;
Fig. 4 is the process flow diagram that disclosed in the embodiment of the present invention, another freely flows down multiple antennas disposal route;
Fig. 5 is a kind of connection layout freely flowing down RSU in multiple antennas disposal route disclosed in the embodiment of the present invention;
Fig. 6 is a kind of structural representation freely flowing down multiple antennas treating apparatus disclosed in the embodiment of the present invention;
Fig. 7 is the structural representation that disclosed in the embodiment of the present invention, another freely flows down multiple antennas treating apparatus;
Fig. 8 is the structural representation that disclosed in the embodiment of the present invention, another freely flows down multiple antennas treating apparatus.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The invention provides a kind of disposal route freely flowing down multiple antennas, be applied to and freely flow down multiple antennas disposal system, described system comprises RSU unit and OBU, and described RSU unit comprises the multiple RSU be connected with each other by network, as shown in Figure 1, described method comprises:
Step S101: before write operation is encrypted to described OBU, in described RSU unit, at least suspend the process of exchange of the RSU adjacent with current RSU, wherein said current RSU is the RSU established the link with described OBU;
As shown in Figure 2, be the effective coverage range of the RSU in each track in ETC free system.As shown in Figure 2, comprise fast, fast traffic lane, slow lane and Emergency Vehicle Lane, generally speaking track is provided with a RSU and this RSU is arranged on the centre in this track.RSU only can establish the link with the RSU in self coverage.
For fast traffic lane, this method is described in detail, the effective coverage range of fast traffic lane RSU is fast traffic lane, the part track of fast and the part track of slow lane, simultaneously also track, passed vehicle road RSU cover part and by track, slow lane RSU cover part, fast traffic lane, so the OBU of driving vehicle, except concluding the business with fast traffic lane RSU, also may conclude the business with fast RSU and slow lane RSU on fast traffic lane.
Therefore when there being vehicle to travel in fast traffic lane, fast traffic lane RSU sets up to conclude the business with the OBU of driving vehicle and links, when fast traffic lane RSU gets random number to OBU and is encrypted write operation, its process of exchange may disturb by passed vehicle road RSU or slow lane RSU, cause fast traffic lane random number that RSU gets invalid, follow-up encryption write operation cannot be carried out.So do not considering in driving vehicle lane change situation, utilize before the random number of getting is encrypted write operation to OBU at fast traffic lane RSU, suspend the process of exchange of the fast RSU adjacent with fast traffic lane and slow lane RSU, avoid the process of exchange between fast RSU and slow lane RSU interference fast traffic lane RSU and OBU.
Consider that driving vehicle travels in RSU transaction area, fast traffic lane, and after the OBU of fast traffic lane RSU and driving vehicle establishes the link, driving vehicle may lane change and the uncertain situation in lane change direction, and the RSU now affecting fast traffic lane RSU process of exchange just can not determine; Such as: driving vehicle lane change to the right to slow lane, because slow lane is covered by slow lane RSU and Emergency Vehicle Lane RSU, so the process of exchange of fast traffic lane RSU and OBU may by the interference of slow lane RSU and Emergency Vehicle Lane RSU; When driving vehicle lane change is left to fast, then the process of exchange of fast traffic lane RSU and OBU affects by fast RSU.So the preferred scheme of the application is the process of exchange of all track RSU suspended except fast traffic lane RSU, to avoid the process of exchange between all the other tracks RSU interference fast traffic lane RSU and OBU.
Further, suspend the process of exchange of the RSU except fast traffic lane RSU and not only refer to that the RSU except fast traffic lane RSU does not work, can also be suspend the current process of exchange of RSU except fast traffic lane RSU, make it that fast traffic lane RSU can be coordinated to complete transaction, concrete fit system illustrates later.
Step S102: described RSU unit utilizes the random number obtained to be encrypted write operation to described OBU;
Also have RSU to obtain the step of random number before this step, detailed content will describe in detail in subsequent content, and in RSU unit, arbitrary RSU all can obtain random number.Random number is obtained herein by fast traffic lane RSU, after at least suspending the fast RSU adjacent with fast traffic lane RSU and slow lane RSU, the process of exchange of fast traffic lane RSU and OBU is then disturbed without other RSU, so it is effective for making RSU obtain random number, random number now just can be utilized to be encrypted write operation to OBU, after OBU feeds back the successful message of encryption to RSU, RSU thinks that OBU has encrypted write operation success.
Step S103: after described RSU unit encrypts write operation success to described OBU, recover the process of exchange of paused RSU.
After RSU utilizes random number to encrypt write operation success to OBU, encryption write operation success command is shared to the RSU suspended trading, after all RSU suspended trading learn the success of encryption write operation, recover the process of exchange before suspending, what so neither affect fast traffic lane RSU adds secret writing process, is unlikely to again the process of exchange affecting other RSU for a long time.
Only be described for fast traffic lane in the present embodiment, be understandable that, the processing mode in other tracks is identical with fast traffic lane, does not repeat them here.
Present embodiments provide one and freely flow down multiple antennas disposal route, after current RSU and OBU sets up transaction, two RSUs adjacent with current RSU have maximum possible to produce OBU to disturb, and then affect the validity of random number, so the application is utilizing before acquired random number is encrypted write operation to OBU, at least should suspend the process of exchange of two RSUs adjacent with current RSU, then current RSU or other RSU utilizes random number to be encrypted write operation to OBU, after the success of encryption write operation, the process of exchange of other RSU just can not affect the validity of random number, so the process of exchange of paused RSU now can be recovered.Due to the validity without the random number used in RSU interference encryption write operation process in the application, OBU can not be caused by pintle hook lock so utilize random number to be encrypted operation to OBU, thus improve Transaction Success rate and be user-friendly to.
Below to step S101 in Fig. 1: before being encrypted write operation to described OBU, the concrete implementation at least suspending the process of exchange of the RSU adjacent with current RSU in described RSU unit is described in detail, present embodiments provide three kinds of executive modes of step S101, below three kinds of embodiments be described one by one:
The first: when described current RSU utilize get random number order random number operation is got to described OBU time, described random number operational order of getting at least is shared to the RSU adjacent with described current RSU by described current RSU, and the RSU getting random number operational order described in sharing all suspends trading process;
Be described for fast traffic lane, at driving vehicle through fast traffic lane, using RSU corresponding for fast traffic lane as current RSU, driving vehicle OBU and current RSU set up to conclude the business and link in theory, when the process of exchange of current RSU and OBU proceeds to get random number operation, current RSU is got random number operational order and be at least shared to the fast RSU adjacent with fast traffic lane and slow lane RSU.
When driving vehicle not lane change, be shared to adjacent fast RSU and slow lane RSU other tracks RSU can be avoided to disturb the transaction thread of current RSU by getting random number operational order, when driving vehicle lane change, due to final track after not knowing the direction of lane change and lane change, in order to ensure the validity of got random number, optimum way is that random number operational order is shared to all RSU, share the process of exchange that the RSU obtaining getting random number operational order all suspends current execution, paused RSU can not affect the process of exchange of current RSU and OBU.Network consisting between each RSU in the present embodiment, current RSU to share to all the other RSU get random number operational order by getting network that random number operational order forms between RSU.
After current RSU performs and shares and get random number operational order, current RSU performs OBU and gets random number operation and obtain random number, and utilizes the random number obtained to perform encryption write operation to OBU, recovers the process of exchange of paused RSU after completing encryption write operation.Above-mentioned four steps realize by current RSU, object of the present invention can be realized like this, but because RSU operating process controls by system sequence, in one-period, current RSU only can perform a step, so execute above-mentioned four steps at least need four cycles, this extends the performance period of RSU virtually.
Simultaneously, the RSU of paused process of exchange cannot perform the process of exchange of self and be in idle condition, with it, RSU of paused transaction being in idle condition, not as all paused RSU being added the processing procedure of current OBU, accelerating the transaction process of current OBU.So select arbitrary RSU to perform current OBU in paused RSU get random number operation, random number operational order is got because paused RSU all have shared, so each paused RSU all can to OBU perform get random number operation, and need not to be current RSU perform get random number operating process.Preferably, get the RSU that in the RSU of random number operational order, select progressively chronologically triggers at first in all acquisitions and random number operation is got to OBU, the operation of OBU being got to random number can be made like this to carry previous timing cycles, accelerate the treatment progress of current OBU.Easily expect, adopt in this way, also can ensure to get random number success when vehicle lane change, more Transaction Success rate.
Preferably, get after in the RSU of random number operational order, arbitrary RSU gets random number operation failure to described OBU in all acquisitions, the next RSU of sequence trigger switch continues to get random number operation until get random number success to described OBU chronologically.The treatment progress of current OBU can be accelerated like this.Get random number successful RSU and random number is shared to all RSU.
The second: get before random number operates after described current RSU and described OBU establishes the link, to described OBU, described current RSU is at least shared to the RSU adjacent with described current RSU by establishing the link operation, and the RSU establishing the link operation described in sharing all suspends trading process;
In the second embodiment, before performing and get random number operation after establishing the link at current RSU and OBU, to OBU, network between self and OBU establish the link and to operate by each RSU by current RSU is at least shared to the RSU adjacent with current RSU, share establish the link operation RSU after learning that current RSU and OBU establishes the link, just the process of exchange of self is suspended, avoid establishing the link with the current OBU that concludes the business, affect the process of exchange of current RSU and OBU.
Then get any one content of random number way in implementing by the first and random number is got to OBU, and after getting random number success, random number is shared to all RSU.
The third: when described current RSU utilize get random number order random number successful operation is got to described OBU after, write operation is encrypted to described OBU before, described current RSU is at least shared to the RSU adjacent with described current RSU by getting the order of random number successful operation, and the RSU getting the order of random number successful operation described in sharing all suspends trading process.
In the third embodiment after current RSU and OBU establishes the link and obtains random number, and before write operation is encrypted to OBU, the order and random number of getting random number successful operation are all shared to the RSU adjacent with current RSU by current RSU, and the RSU sharing to random number all suspends the process of exchange of self.
Three kinds of modes are summarized: in different steps, all the other RSU outside current RSU are suspended trading respectively in above-mentioned three kinds of modes, as long as the present invention current RSU obtain random number in time encrypting write operation success in this time period, ensure that not having other RSU to disturb just can, in the second at the beginning of current RSU and OBU connects, just suspend the process of exchange of all the other RSU, this causes the time out of all the other RSU partially long, though can the object of the invention be realized, larger on the process of exchange impact of other RSU.
Before performing encryption write operation in the third mode after current RSU obtains random number, suspend the process of exchange of all the other RSU, but going back following and suspending all the other RSU may appear in this mode, just RSU is had to disturb the process of exchange of current RSU, although have the probability of realization but have the probability of failure yet, do not advise adopting.The second embodiment can realize the solution of the present invention completely, so suggestion adopts the second embodiment.
Introduce step S103 in Fig. 1 below: after described RSU unit encrypts write operation success to described OBU, recover the process of exchange of paused RSU, as shown in Figure 3, comprising:
Step S201: RSU encryption write operation success command being shared to by the successful RSU of OBU encryption write operation to all acquisition random numbers;
After having RSU to encrypt write operation success to OBU, encryption write operation success command is shared to the RSU of all processes of suspending trading and current RSU by this RSU, and object is to inform that the RSU of the process of suspending trading is current and has encrypted write operation success, without the need to suspending trading again; Inform that current RSU has encrypted write operation success now, the subsequent step of encryption write operation can be performed.
Step S202: the RSU of all processes of suspending trading when receiving the encryption write operation success command shared, and all recovers the process of exchange before suspending.
Now paused RSU receives encryption write operation and successfully orders process of exchange before rear recovery.The encryption successful step place of write operation will be returned to, the transaction step that should perform before other paused RSU then returns to time-out for current RSU.
Preferably, do not search described OBU when RSU utilizes described random number to be encrypted write operation to described OBU, then the next RSU of sequence trigger switch continues to be encrypted write operation to described OBU chronologically, until the success of encryption write operation.
After described OBU encrypts write operation failure, time and the OBU mark correspondence of described OBU being encrypted write operation failure are saved in default queue.When RSU utilizes random number to be encrypted write operation to OBU, if do not search described OBU, then the next RSU of sequence trigger switch is encrypted write operation to OBU chronologically, when encrypting write operation mistake to OBU, being encrypted write operation to OBU more easily causes OBU by pintle hook lock, so the mark of OBU is saved in default queue by the present invention, suspends and OBU is concluded the business, prevent OBU by pintle hook lock.Only have after OBU is greater than default life span the storage time in default queue, just allow to conclude the business to OBU.
So when needs are concluded the business to OBU, need to judge whether OBU meets pre-conditioned.Pre-conditioned can be empty condition, namely without the need to RSU, deterministic process is performed to OBU, write operation can be encrypted to OBU, write operation can not be encrypted to OBU again when considering and write operation failure is encrypted to OBU, so the present embodiment judge to current OBU be encrypted write can not cause OBU by pintle hook lock time, just write operation is encrypted to OBU.Introduce concrete deterministic process below, as shown in Figure 4, comprising:
Step S401: judge whether described OBU mark is present in described default queue; If so, enter step S403, enter step S402 if not;
First judge whether the mark of OBU is present in default queue, because being of storing in queue may by the mark of the OBU of pintle hook lock, so show that OBU exists by the risk of pintle hook lock when OBU mark is present in default queue, then represent that OBU does not exist by the risk of pintle hook lock when OBU mark does not exist in default queue.
Step S402: judgement meets pre-conditioned;
Then represent that OBU does not exist by the risk of pintle hook lock when OBU mark does not exist in default queue, so judgement meets pre-conditioned, directly can be encrypted write operation.
Be greater than described default life span when the described holding time, can continue to be encrypted write operation to OBU, so now judgement meets pre-conditioned.
Step S403: when described OBU mark is present in described default queue, then judge whether the holding time of described OBU in described default queue is greater than default life span; If so, then enter step S402, enter step S404 if not;
Show that OBU exists by the risk of pintle hook lock when OBU mark is present in default queue, but the requirement of OBU is again can not encrypt write operation to the OBU of encryption write operation failure within continuous a period of time, as long as so OBU is not exceeded default life span by the time operated, then show now can continue to be encrypted write operation to OBU.Being less than default life span when leaving the time in default queue in, still can there is pintle hook lock risk.
Step S404: be not more than described default life span when the described holding time, then judge not meet pre-conditioned.
When the described holding time is not more than described default life span, also can there is OBU by the risk of pintle hook lock, so now judge not meet pre-conditioned.
Through above-mentioned judgement, when the OBU corresponding with OBU mark meets pre-conditioned, write operation can be encrypted to OBU, otherwise write operation be encrypted to OBU, prevent OBU by pintle hook lock.
After increase is pre-conditioned, the step S102 of Fig. 1 can be preferably: described RSU unit judgement described OBU meet pre-conditioned after, utilize described random number to be encrypted write operation to described OBU, in wherein said RSU unit, arbitrary RSU gets the RSU of random number successful operation or the RSU of shared random number, can also be the controller be connected with multiple RSU.
Get the successful RSU of random operation, or the RSU of shared random number all can perform encryption write operation to OBU, when determining that OBU meets pre-conditioned, show that OBU does not have pintle hook lock risk, facility is encrypted write operation by this random number to OBU, after OBU feeds back the successful message of encryption to RSU, RSU thinks that OBU has encrypted write operation success.Showing that when not meeting pre-conditioned OBU has pintle hook lock risk, write operation not being encrypted to OBU.When the application solves that current RSU is encrypted write operation to OBU in free streaming system, being interfered causes the problem of pintle hook lock; in addition the OBU of easy pintle hook lock is protected; solve the problem that user cannot normally use due to OBU pintle hook lock, and improve Transaction Success rate.
Introduce scene embodiment of the present invention below:
(1) hardware design
Form LAN (Local Area Network) by RSU, controller, and interconnected by line synchro between each RSU, each terminal can be carried out Transaction Information by the LAN (Local Area Network) of its composition and be shared.System hardware block architecture diagram is as shown in Figure 5:
(2) Software for Design
A) transaction data between first each RSU is shared by limited Web broadcast.Broadcast IP address is 255.255.255.255, and datagram only occurs in the home network, and under any circumstance router does not forward the datagram that destination address is limited broadcast address.Ensure that each identification point, the data namely between free streaming system and system can not be disturbed mutually.
B) port numbers of data shared in a selected network-side slogan as each RSU, and such as 8866.Each RSU needs the data shared by address 255.255.255.255, and port numbers 8866 is broadcast in network.Any RSU is with OBU process of exchange, and when random number step is got in arrival, share in network by this operation, data are defined as follows:
| OBU_ID | State_get_random_data (getting random number) |
C) network of all RSU real-time listening port numbers 8866 shares data, when receive share come get random number operation steps after, if there is other OBU to be in process of exchange, suspend the transaction work to other OBU, according to timing requirements, order gets random number operation to sharing the OBU come.
D) after any RSU receives the external authentication random number that OBU returns, by data sharings such as external authentication random number, written document side-play amounts in network, data are defined as follows:
| OBU_ID | File_offset | Random_data |
E) after all RSU receive the random number shared and come, according to timing requirements, carry out being encrypted write operation to OBU to OBU by this random number order.Ensure that all RSU at this time send out the same data frame signal, just look like only have a RSU being encrypted operation to it concerning OBU.
F) when encrypting write operation success, OBU is to the success of RSU feedback encryption write operation, and any RSU will be encrypted the successful information sharing of write operation to other all RSU after receiving the Transaction Success that OBU returns to this OBU.After other RSU receive information, get back to original duty.The data shared are defined as follows:
| OBU_ID | State_write_finish |
G) set up a container, the capacity of container can be defined as deposits 8 OBU.If OBU " return " key" mistake, cryptographic operation failure, be deposited in container by this OBUID and current time, the data stored in the OBU of container are defined as follows:
| OBU_ID | Time (current time) |
The data layout of receptacle is as follows:
| OBU_ID_0 | Time |
| OBU_ID_1 | Time |
| OBU_ID_2 | Time |
| OBU_ID_3 | Time |
| OBU_ID_4 | Time |
| OBU_ID_5 | Time |
| OBU_ID_6 | Time |
| OBU_ID_7 | Time |
When OBU joins in container by needs, search an idle position in a reservoir and insert OBU and current time, idle position comprises the current position having exceeded life cycle of OBU time gap of not depositing OBU or depositing in this position.
When write operation being encrypted to OBU at every turn, all judge whether this OBU deposits in a reservoir, if there is no in container, represent that this OBU does not encrypt write operation wrong cipher key unsuccessfully mistake, that is be safe to the operation of this OBU, can not cause its pintle hook lock at present, RSU will walk downward flow process, be encrypted write operation to this OBU.
If OBU deposits in a reservoir, judge that this OBU deposits time in a reservoir and more whether current time has exceeded life span (such as 30 minutes), if also do not represent that being encrypted write operation to this OBU is at present likely cause pintle hook lock, so RSU abandons being encrypted write operation to this OBU.If exceed life span, represent that this OBU may be for the second time through identification point, so can be encrypted write operation to this OBU.
The technical program obtains commercialization industrialization in the free streaming system of ETC, solve in free streaming system, be interfered during encryption write operation OBU and cause the problem of pintle hook lock, the free streaming system of ETC is applied in intelligent transportation field, greatly will improve the competitiveness of product in market.
As shown in Figure 6, the invention provides a kind for the treatment of apparatus freely flowing down multiple antennas, be applied to and freely flow down multiple antennas disposal system, described system comprises RSU unit and OBU, and described RSU unit comprises the multiple RSU be connected with each other by network, and described RSU comprises:
Suspend unit 61, for before being encrypted write operation to described OBU, in described RSU unit, at least suspend the process of exchange of two RSUs adjacent with current RSU, wherein said current RSU is the RSU established the link with described OBU;
Ciphering unit 62, utilizes the random number obtained to be encrypted write operation to described OBU for described RSU unit;
Recovery unit 63, after encrypting write operation success at described RSU unit to described OBU, recovers the process of exchange of paused RSU.
As shown in Figure 7, described time-out unit 61 comprises:
First suspends unit 611, for getting before random number operates after establishing the link at described current RSU and described OBU, to described OBU, described current RSU is at least shared to the RSU adjacent with described current RSU by establishing the link operation, and the RSU establishing the link operation described in sharing all suspends trading process; Or
Second suspends unit 612, for utilize as described current RSU get random number order random number operation is got to described OBU time, described random number operational order of getting at least is shared to the RSU adjacent with described current RSU by described current RSU, and the RSU getting random number operational order described in sharing all suspends trading process; Or
3rd suspends unit 613, for utilize as described current RSU get random number order random number successful operation is got to described OBU after, write operation is encrypted to described OBU before, described current RSU is at least shared to the RSU adjacent with described current RSU by getting the order of random number successful operation, and the RSU getting the order of random number successful operation described in sharing all suspends trading process.
As shown in Figure 8, a kind of RSU provided by the invention, also comprises: obtain random number unit 64, obtains random number, specifically comprise for RSU unit:
First acquiring unit 641, establishes the link arbitrary RSU in the RSU of operation and gets random number operation to described OBU execution, after RSU gets random number successful operation, obtain random number for all acquisitions; Described random number is shared to the RSU that all acquisitions establish the link operation by the RSU getting random number successful operation;
Second acquisition unit 642, get arbitrary RSU in the RSU of random number operational order for all acquisitions and get random number operation to described OBU execution, random number is shared to the RSU that random number operational order is got in all acquisitions by the RSU getting random number successful operation.
First persistence element 65, does not search described OBU when getting random number operation for RSU to described OBU, then the next RSU of sequence trigger switch continues to get random number operation until get random number success to described OBU chronologically;
Second persistence element 66, described OBU is not searched when utilizing described random number to be encrypted write operation to described OBU for RSU, then the next RSU of sequence trigger switch continues to be encrypted write operation to described OBU chronologically, is less than preset times until encrypt write operation success and encrypt the write operation frequency of failure.
Storaging mark unit 67, after encrypting write operation failure as described OBU, time and the OBU mark correspondence of described OBU being encrypted write operation failure are saved in default queue.
Judging unit 68, for judging whether described OBU mark is present in described default queue; When described OBU mark is not present in described default queue, then judgement meets pre-conditioned; When described OBU mark is present in described default queue, then judge whether the holding time of described OBU in described default queue is greater than default life span; Be greater than described default life span when the described holding time, then judgement meets pre-conditioned; Be not more than described default life span when the described holding time, then judge not meet pre-conditioned.
The invention provides one and freely flow down multiple antennas treating apparatus, the application is after current RSU and OBU sets up transaction, the RSU adjacent with current RSU has maximum possible to produce OBU to disturb, and then affect the validity of random number, so the application has obtained before random number is encrypted write operation to OBU in utilization, at least should suspend the process of exchange with current RSU adjacent R SU, then current RSU or other RSU utilizes random number to be encrypted write operation to OBU, after the success of encryption write operation, the process of exchange of other RSU just can not affect the validity of random number, so the process of exchange of paused RSU now can be recovered.
Owing to disturbing the validity of the random number used in ciphering process without RSU in the application, OBU can not be caused by pintle hook lock so utilize random number to be encrypted operation to OBU, thus improve Transaction Success rate and be user-friendly to.
Present invention also offers one and freely flow down multiple antennas disposal system, described system comprises:
RSU unit and OBU, described RSU unit comprises the multiple RSU be connected with each other by network.
Described RSU unit, for before being encrypted write operation to described OBU, in described RSU unit, at least suspend the process of exchange of the RSU adjacent with current RSU, wherein said current RSU is the RSU established the link with described OBU; Described RSU unit utilizes the random number obtained to be encrypted write operation to described OBU; After described RSU unit encrypts write operation success to described OBU, recover the process of exchange of paused RSU.
Described RSU comprises the treating apparatus freely flowing down multiple antennas as above.
If the function described in the present embodiment method using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computing equipment read/write memory medium.Based on such understanding, the part of the part that the embodiment of the present invention contributes to prior art or this technical scheme can embody with the form of software product, this software product is stored in a storage medium, comprising some instructions in order to make a computing equipment (can be personal computer, server, mobile computing device or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, ROM (read-only memory) (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. various can be program code stored medium.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiment, between each embodiment same or similar part mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. freely flow down a disposal route for multiple antennas, it is characterized in that, be applied to and freely flow down multiple antennas disposal system, described system comprises RSU unit and OBU, and described RSU unit comprises the multiple RSU be connected with each other by network, and described method comprises:
Before being encrypted write operation to described OBU, in described RSU unit, at least suspend the process of exchange of the RSU adjacent with current RSU, wherein said current RSU is the RSU established the link with described OBU;
Described RSU unit utilizes the random number obtained to be encrypted write operation to described OBU;
After described RSU unit encrypts write operation success to described OBU, recover the process of exchange of paused RSU.
2. the method for claim 1, is characterized in that, described before being encrypted write operation to described OBU, and the process of exchange at least suspending two RSUs adjacent with current RSU in described RSU unit comprises:
Get before random number operates after described current RSU and described OBU establishes the link, to described OBU, described current RSU is at least shared to the RSU adjacent with described current RSU by establishing the link operation, and the RSU establishing the link operation described in sharing all suspends trading process; Or
When described current RSU utilize get random number order random number operation is got to described OBU time, described random number operational order of getting at least is shared to the RSU adjacent with described current RSU by described current RSU, and the RSU getting random number operational order described in sharing all suspends trading process; Or
When described current RSU utilize get random number order random number successful operation is got to described OBU after, write operation is encrypted to described OBU before, described current RSU is at least shared to the RSU adjacent with described current RSU by getting the order of random number successful operation, and the RSU getting the order of random number successful operation described in sharing all suspends trading process.
3. method as claimed in claim 2, is characterized in that, the process that RSU unit obtains random number comprises:
When getting before random number operates described in employing after described current RSU and described OBU establishes the link, to described OBU, described current RSU is at least shared to the RSU adjacent with described current RSU by establishing the link operation, the RSU establishing the link operation described in sharing all suspend trading process steps time, all acquisitions establish the link arbitrary RSU in the RSU of operation and get random number operation to described OBU execution, after RSU gets random number successful operation, obtain random number; Described random number is shared to the RSU that all acquisitions establish the link operation by the RSU getting random number successful operation; Or
When adopt described when described current RSU utilize get random number order to described OBU get random number operate time, described random number operational order of getting at least is shared to the RSU adjacent with described current RSU by described current RSU, the RSU getting random number operational order described in sharing all suspend trading process steps time, all acquisitions are got arbitrary RSU in the RSU of random number operational order and are got random number operation to described OBU execution, and random number is shared to the RSU that random number operational order is got in all acquisitions by the RSU getting random number successful operation.
4. method as claimed in claim 3, is characterized in that, the random number that described RSU unit utilization obtains is encrypted write operation to described OBU and comprises:
Described RSU unit judgement described OBU meet pre-conditioned after, utilize described random number to be encrypted write operation to described OBU, in wherein said RSU unit, arbitrary RSU gets the RSU of random number successful operation or the RSU of shared random number.
5. method as claimed in claim 4, is characterized in that, after described RSU unit encrypts write operation success to described OBU, the process of exchange recovering paused RSU comprises:
Encryption write operation success command is shared to by the successful RSU of OBU encryption write operation to the RSU of all acquisition random numbers;
The RSU of all processes of suspending trading, when receiving the encryption write operation success command shared, all recovers the process of exchange before suspending.
6. method as claimed in claim 4, is characterized in that, also comprise:
RSU does not search described OBU when getting random number to described OBU, then the next RSU of sequence trigger switch continues to get random number operation until get random number success to described OBU chronologically.
7. method as claimed in claim 6, is characterized in that, also comprise:
After described OBU encrypts write operation failure, time and the OBU mark correspondence of described OBU being encrypted write operation failure are saved in default queue.
8. method as claimed in claim 7, is characterized in that, judge that described OBU meets pre-conditioned process and comprises:
Judge whether described OBU mark is present in described default queue;
When described OBU mark is not present in described default queue, then judgement meets pre-conditioned;
When described OBU mark is present in described default queue, then judge whether the holding time of described OBU in described default queue is greater than default life span;
Be greater than described default life span when the described holding time, then judgement meets pre-conditioned;
Be not more than described default life span when the described holding time, then judge not meet pre-conditioned.
9. freely flow down a treating apparatus for multiple antennas, it is characterized in that, be applied to and freely flow down multiple antennas disposal system, described system comprises RSU unit and OBU, and described RSU unit comprises the multiple RSU be connected with each other by network, comprising:
Suspend unit, for before being encrypted write operation to described OBU, in described RSU unit, at least suspend the process of exchange of two RSUs adjacent with current RSU, wherein said current RSU is the RSU established the link with described OBU;
Ciphering unit, utilizes the random number obtained to be encrypted write operation to described OBU for described RSU unit;
Recovery unit, after encrypting write operation success at described RSU unit to described OBU, recovers the process of exchange of paused RSU.
10. a RSU, it is characterized in that, for freely flowing down multiple antennas disposal system, described system comprises RSU unit and OBU, described RSU unit comprises the multiple RSU be connected with each other by network, and described RSU comprises the treating apparatus freely flowing down multiple antennas as claimed in claim 9.
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