CN106910256B - A kind of multiple antennas under multilane free flow works together method and system - Google Patents

A kind of multiple antennas under multilane free flow works together method and system Download PDF

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CN106910256B
CN106910256B CN201510971363.4A CN201510971363A CN106910256B CN 106910256 B CN106910256 B CN 106910256B CN 201510971363 A CN201510971363 A CN 201510971363A CN 106910256 B CN106910256 B CN 106910256B
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obu
rsu
information
communication zone
sent
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CN106910256A (en
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李媛媛
吴尽龙
胡攀攀
房颜明
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Beijing Wanji Technology Co Ltd
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Beijing Wanji Technology Co Ltd
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Finance (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Traffic Control Systems (AREA)

Abstract

The present invention provides the multiple antennas associated working method and system under a kind of multilane free flow, which comprises according to the uplink information that the received OBU of roadside unit RSU more than one in default communication zone is sent, determines the location information of the OBU；The first OBU described in distance to a declared goal nearest RSU sends downlink information to the OBU；Whether judge to preset in communication zone in preset time has RSU to receive the uplink information that the OBU is sent；If so, continuing to execute includes the step of basis presets the uplink information that the more than one received OBU of roadside unit RSU is sent in communication zone, until the sign off of the RSU in the OBU and default communication zone.The present invention is able to solve on the market partly because the problem of OBU deviation of directivity causes vehicle transaction communications to fail, improves OBU vehicle transaction communications success rate on the whole.The present invention can also improve the lane change occurred in multilane free flow process of exchange, jump a queue when OBU vehicle transaction communications success rate.

Description

A kind of multiple antennas under multilane free flow works together method and system
Technical field
The invention belongs to intelligent transportation fields, and in particular to the multiple antennas under a kind of multilane free flow works together method And system.
Background technique
ETC (ETC, Electronic Toll Collection, electric non-stop toll system based on bicycle road mode System) though technology is more mature at present, which needs to install OBU's (OBU, On-Board Unit, vehicle carried electronic label) Vehicle enters specific lane, passes through the lane ETC with low speed (20km/h)；For entering the illegal vehicle in the lane ETC, lane railing It is automatic to intercept, it is handled by manual intervention.The relatively traditional manual toll collection of the E-payment system of bicycle road mode, in lane Ability all increases in the effect of energy-saving and emission-reduction, but there are still the relatively lower speed, illegal vehicles that is open to traffic to need live people The inconvenience such as work processing.The problems such as vehicle congestion and its caused environmental pollution, needs urgent solution to have become various circles of society's common recognition, Under the overall background of " internet+" and " smart city ", the free Flow Technique of multilane based on ETC technology comes into being.
The free Flow Technique of multilane is to administer the urban traffic controls such as traffic congestion, security administration, intelligent parking lot management It provides comprehensively and accurately scheme, its universal and application is to improving China's means of transportation service efficiency, improve urban transportation Intelligent level is of great significance.In view of the gradually application of multilane free flow system, there is OBU vehicle by sustainable growth, certainly It need to be in the case where not influencing current driving speed by stream charging system, it is ensured that have the trading efficiency of OBU vehicle and trade successfully Rate.But at present on the market with the presence of part storage vehicle carried electronic label because directional diagram local derviation causes DSRC (DSRC, Dedicated Short Range Communications, professional short-range communication technology) uplink signal deviates normal direction in short range communication, into And the problem of leading to Fail Transaction, this reduces the transaction success for having OBU vehicle under free flow charging system to a certain extent Rate and excessively vehicle rate.In addition, the lane change occurred in multilane free flow process of exchange, jump a queue when also will affect and trade successfully Rate and excessively vehicle rate.
Summary of the invention
For the defects in the prior art, the present invention provides a kind of multiple antennas associated working method under multilane free flow And system, solve the problems, such as on the market partly because the OBU deviation of directivity cause vehicle transaction communications fail, improve OBU on the whole Vehicle transaction communications success rate.
In a first aspect, working together method the present invention provides the multiple antennas under a kind of multilane free flow, when detecting When having vehicle to drive into default communication zone, the vehicle carried electronic label OBU of the vehicle is waken up, and executes following steps:
S1, believed according to the uplink for presetting the more than one received OBU transmission of roadside unit RSU in communication zone Breath, determines the location information of the OBU；
S2, according to the location information of the OBU, under the first OBU described in distance to a declared goal nearest RSU is sent to the OBU Row information；
S3, judge to preset the uplink information for whether thering is RSU to receive the OBU transmission in communication zone in preset time； If so, step S1-S3 is continued to execute, until the sign off of the RSU in the OBU and default communication zone.
Preferably, the uplink information sent according to the received OBU of RSU more than one in default communication zone, really The location information of the fixed OBU, comprising:
After more than one RSU sends uplink information into default communication zone in the OBU, a RSU hair is received The first location information sent, the first location information are that a RSU is obtained according to the uplink information that its received described OBU is sent It takes；
According to the first location information, the location information of the OBU is determined.
Preferably, the uplink information sent according to the received OBU of RSU more than one in default communication zone, really The location information of the fixed OBU, comprising:
After more than one RSU sends uplink information into default communication zone in the OBU, multiple RSU hairs are received The multiple second location informations sent, the multiple second location information are multiple RSU according to the upper of its received OBU transmission What row information obtained；
According to the multiple second location information, the location information of the OBU is determined.
Preferably, described according to the multiple second location information, determine the location information of the OBU, comprising:
Farthest value and the most recent value in the multiple second location information are removed, obtains removing the multiple of farthest value most recent value Second location information；
Multiple second location informations of the farthest value most recent value of the removal are averaging, determine the location information of the OBU.
Preferably, whether judge to preset in preset time has RSU to receive the uplink letter that the OBU is sent in communication zone Breath, the method also includes:
If it is not, then the 2nd the first RSU described in distance to a declared goal nearest RSU to the OBU sends downlink information, and judge pre- If whether preset in communication zone in the time has RSU to receive the uplink information that the OBU is sent.
Preferably, described to judge whether there is RSU to receive the upper of the OBU transmission in default communication zone in preset time Row information, specifically:
After the first RSU sends downlink information to the OBU, judge whether there is RSU to connect in default communication zone Receive the uplink information that the OBU is sent；
If it is not, then judge the first RSU to the OBU send downlink information number whether be more than preset times value, If it is not, then continuing that the first RSU is specified to send downlink information to the OBU, otherwise, the first RSU described in distance to a declared goal is nearest The 2nd RSU to the OBU send downlink information.
Preferably, the multiple antennas includes the RSU combination of single goal positioning antenna or the RSU group of Multi-target position antenna It closes.
Second aspect, the present invention provides the multiple antennas associated working system under a kind of multilane free flow, the systems Include:
Position units, for according to the uplink letter for presetting the more than one received OBU transmission of RSU in communication zone Breath, determines the location information of the OBU；
Designating unit, for the location information according to the determining OBU of the position units, OBU described in distance to a declared goal is nearest The first RSU to the OBU send downlink information；
Whether judging unit, judging to preset in communication zone in preset time has RSU to receive the uplink that the OBU is sent Information.
Preferably, the designating unit, is also used to,
After the first RSU sends downlink information to the OBU, judging unit judges do not have in default communication zone When RSU receives the uplink information that the OBU is sent, the 2nd the first RSU described in distance to a declared goal nearest RSU is sent out to the OBU Send downlink information.
Preferably, the judging unit, is also used to,
After the 2nd RSU sends downlink information to the OBU, judge whether there is RSU to connect in default communication zone Receive the uplink information that the OBU is sent.
As shown from the above technical solution, the present invention provides a kind of multiple antennas associated working methods under multilane free flow And system, the location information of the OBU is determined by presetting more than one roadside unit RSU in communication zone, and then specified First RSU nearest apart from the OBU sends downlink information to the OBU, and the RSU in default communication zone receives institute It after the uplink information for stating OBU transmission, repeats the above steps, until the communication knot of the RSU in the OBU and default communication zone Beam.The present invention is able to solve on the market partly because the problem of OBU deviation of directivity causes transaction communications to fail, improves on the whole OBU vehicle transaction communications success rate.The present invention can also improve the lane change occurred in multilane free flow process of exchange, jump a queue In the case of OBU vehicle transaction communications success rate.
Detailed description of the invention
In order to illustrate more clearly of the embodiment of the present disclosure or technical solution in the prior art, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Disclosed some embodiments for those of ordinary skill in the art without creative efforts, can be with Other attached drawings are obtained according to these figures.
Fig. 1 is the process of the multiple antennas associated working method under a kind of multilane free flow that one embodiment of the invention provides Schematic diagram；
Fig. 2 be another embodiment of the present invention provides a kind of multilane free flow under multiple antennas work together method stream Journey schematic diagram；
Fig. 3 is the structure of the multiple antennas associated working system under a kind of multilane free flow that one embodiment of the invention provides Schematic diagram；
Fig. 4 is that the OBU directional diagram of vehicle is slightly away from normal direction schematic diagram；
Fig. 5 is the OBU directional diagram substantial deviation normal direction schematic diagram of vehicle；
Fig. 6 is that the OBU directional diagram of vehicle is slightly away from normal direction and across road schematic diagram.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present disclosure, the technical solution in the embodiment of the present disclosure is carried out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the disclosure, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment belongs to the range of disclosure protection.
Partial words as mentioned in the embodiments of the present invention are illustrated below.
Roadside unit RSU (Road Side Unit) is drive-in toll ETC (Electronic Toll Collection) in system, it is mounted on trackside, using DSRC (Dedicated Short Range Communication) skill Art is communicated with the vehicle carried electronic label (OBU, On Board Unit) being installed on vehicle, realization testing vehicle register identification, Electronics deduction of points, automatic fee device.
Fig. 1 shows the multiple antennas associated working method under a kind of multilane free flow of one embodiment of the invention offer Flow diagram, the method as shown in Figure 1, multiple antennas under a kind of multilane free flow of the present embodiment works together, works as detection To when having vehicle to drive into default communication zone, the vehicle carried electronic label OBU of the vehicle is waken up, and executes following steps:
S1, believed according to the uplink for presetting the more than one received OBU transmission of roadside unit RSU in communication zone Breath, determines the location information of the OBU.
It is understood that in this example, the design of RSU follows standard GB/T 20851, communication frequency is 5.8GHz.In addition to this, as shown in figure 4, workspace 1 is the working region of RSU1, workspace 2 is the working region of RSU2. The workspace 1 of RSU1 covers its lane 1 installed, and is no more than 1m with 2 lap of the workspace of adjacent R SU2.
Further, in the present embodiment, RSU has positioning function and trading function.Specifically, RSU has basis The uplink information that OBU is sent also has and is communicated with OBU to the function that OBU is positioned, and then completes vehicle identification and know Not, electronics deduction of points, automatic fee function.
S2, according to the location information of the OBU, under the first OBU described in distance to a declared goal nearest RSU is sent to the OBU Row information.
It is understood that can determine the nearest RSU of distance OBU according to the location information of OBU.In general, distance OBU nearest RSU is the corresponding RSU in lane where OBU.
Specifically, as shown in figure 4, OBU in lane 1, distance OBU nearest RSU is mounted in lane 1 at this time RSU1.RSU1 is communicated with OBU as a result, is sent to it downlink information.
S3, judge to preset the uplink information for whether thering is RSU to receive the OBU transmission in communication zone in preset time.
It is understood that the communication of RSU and OBU should be complete in a relatively short period of time to guarantee the unimpeded of road traffic At, therefore whether should periodically detect within a preset time has RSU to receive the uplink information that the OBU is sent.
Specifically, as shown in figure 4, RSU1, RSU2, RSU3 under multilane may will receive the uplink of OBU reply Signal, if RSU1, RSU2, RSU3 under multilane receive the upper of the OBU transmission after OBU sends uplink signal Row information, at this point, step S1-S3 is continued to execute, until the sign off of the RSU in the OBU and default communication zone.
The present embodiment starts the multiple antennas under multilane and combines reception, efficiently solves on the market partially because in OBU transmitting The deviation of row signal is just often resulting in the problem of lane antenna does not receive OBU uplink signal, and it is logical to improve the transaction of OBU vehicle on the whole Believe success rate.The present embodiment can also improve the lane change occurred in multilane free flow process of exchange, jump a queue when OBU Vehicle transaction communications success rate.
Fig. 2 shows another embodiment of the present invention provides a kind of multilane free flow under multiple antennas work together method Flow diagram, the method as shown in Fig. 2, multiple antennas under a kind of multilane free flow of the present embodiment works together works as inspection When having measured vehicle and driving into default communication zone, the vehicle carried electronic label OBU of the vehicle is waken up, and execute following steps:
S21, believed according to the uplink for presetting the more than one received OBU transmission of roadside unit RSU in communication zone Breath, determines the location information of the OBU.
It is understood that RSU orients beam control read-write antenna by high-gain and rf control unit forms.In the present embodiment In, the multiple antennas includes the RSU combination of single goal positioning antenna or the RSU combination of Multi-target position antenna.
Optionally, the S21 specifically includes following step S211-S212:
S211, after more than one RSU sends uplink information into default communication zone in the OBU, one is received The first location information that RSU is sent, the first location information are the uplink that a RSU is sent according to its received described OBU Acquisition of information.
S212, according to the first location information, determine the location information of the OBU.
Optionally, the S21 specifically includes following step the S211 '-S213 ' of alternative step S211-S213:
S211 ', it after in the OBU, into default communication zone, more than one RSU sends uplink information, receives multiple Multiple second location informations that RSU is sent, the multiple second location information are that multiple RSU are sent out according to its received described OBU What the uplink information sent obtained.
Farthest value and most recent value in S212 ', the multiple second location information of removal, obtain removing farthest value most recent value Multiple second location informations；
S213 ', multiple second location informations of the farthest value most recent value of the removal are averaging, determine the position of the OBU Confidence breath.
S22, according to the location information of the OBU, under the first OBU described in distance to a declared goal nearest RSU is sent to the OBU Row information.
It is understood that can determine the nearest RSU of distance OBU according to the location information of OBU.In general, distance OBU nearest RSU is the corresponding RSU in lane where OBU.
Specifically, as shown in figure 5, OBU in lane 1, distance OBU nearest RSU is mounted in lane 1 at this time RSU1.RSU1 is communicated with OBU as a result, is sent to it downlink information.
S23, judge to preset the uplink information for whether thering is RSU to receive the OBU transmission in communication zone in preset time.
It is understood that the S23 specifically include the following steps:
Whether judge to preset in communication zone in preset time has RSU to receive the uplink information that the OBU is sent, if It is then to continue to execute step S21-S23, until the sign off of the RSU in the OBU and default communication zone；
Otherwise, the 2nd the first RSU described in distance to a declared goal nearest RSU sends downlink information to the OBU, and judges default Whether preset in communication zone in the time has RSU to receive the uplink information that the OBU is sent.
Further, after first RSU nearest apart from the OBU sends downlink information to the OBU, if when default The uplink information that the OBU is sent is received without RSU in interior default communication zone, at this point, judging the first RSU to institute It states OBU and sends whether the number of downlink information is more than preset times value, if it is not, then continuing to specify the first RSU to the OBU Downlink information is sent, otherwise, the 2nd the first RSU described in distance to a declared goal nearest RSU sends downlink information to the OBU.
It is understood that each RSU sends same frame downlink to the OBU in the communication process of RSU and OBU The number of information is all no more than preset times value, it is preferable that the value range of the preset times value is 3-5 times.
Pre- in preset time after if the 2nd RSU nearest apart from the first RSU sends downlink information to the OBU If RSU is not received by the uplink information that the OBU is sent in communication zone, then the 2nd RSU described in distance to a declared goal it is nearest the Three RSU send downlink information to the OBU.
It is understood that attempting the RSU for sending same frame downlink signal to OBU in the communication process of RSU and OBU No more than predetermined number value, it is preferable that the value of the predetermined number value is 3.
Specifically, in actual life, OBU has that directional diagram deviates normal direction, in addition, when lane change It may also influence the directional diagram of OBU.Fig. 4, Fig. 5, Fig. 6 are three kinds of situations of the present embodiment concrete application:
As shown in figure 4, the OBU directional diagram of vehicle there are problems that being slightly away from normal direction in figure, at this point, directional diagram is same When covering RSU1 and RSU2 can communication zone, and be partial to RSU2.
As shown in figure 5, in figure there is substantial deviation normal direction in the OBU directional diagram of vehicle, at this point, directional diagram is only Covering RSU2's can communication zone.
As shown in fig. 6, the OBU directional diagram of vehicle is slightly away from normal direction and across road, has just enter into 2 Shi Qifang of lane in figure To figure and meanwhile cover RSU1 and RSU2 can the comunication area, and be partial to RSU2, when driving into lane 2, directional diagram covers simultaneously RSU2 and RSU3 can communication zone, and be partial to RSU3.
It is understood that all antennas in communication zone are likely to receive the uplink signal of OBU transmission, and Communication zone is limited by the transmission power and receiving sensitivity of RSU, OBU.In Fig. 4, Fig. 5, Fig. 6, RSU under multilane according to OBU sends the location information that uplink signal determines OBU, and RSU controller obtains OBU on lane 1 according to the location information, this When, distance OBU nearest RSU is mounted in the RSU1 in lane 1, and RSU1 sends downlink signal to OBU as a result,.
The transmitting of OBU and received direction are consistent, as shown in figure 5, completely offseting from RSU1 in OBU directional diagram, and are covered When covering RSU2, in such cases, OBU can not receive the downlink signal of RSU1 transmission, so that OBU will not be under multilane RSU sends next frame uplink signal.At this point, RSU and OBU communication disruption under multilane.
RSU controller distance to a declared goal RSU1 nearest RSU2 sends downlink information, the transmitting of OBU and received side to OBU To being consistent, in the direction OBU in the case where map combining RSU2, OBU receives the downlink signal of RSU2 transmission, thus OBU to RSU under multilane sends next frame uplink signal.At this point, the RSU under multilane is communicated with OBU in progress.
The present embodiment starts the multiple antennas under multilane and combines reception, efficiently solves on the market partially because in OBU transmitting The deviation of row signal is just often resulting in the problem of lane antenna does not receive OBU uplink signal, and it is logical to improve the transaction of OBU vehicle on the whole Believe success rate.The present embodiment can also improve the lane change occurred in multilane free flow process of exchange, jump a queue when OBU Vehicle transaction communications success rate.
Fig. 3 shows the multiple antennas associated working system under a kind of multilane free flow of one embodiment of the invention offer Structural schematic diagram, the system 30 as shown in figure 3, multiple antennas under a kind of multilane free flow of the present embodiment works together are described System includes:
Position units 31, for according to the uplink for presetting the more than one received OBU transmission of RSU in communication zone Information determines the location information of the OBU；
Designating unit 32, the location information of the OBU for being determined according to the position units 31, OBU described in distance to a declared goal The first nearest RSU sends downlink information to the OBU；
Whether judging unit 33, judging to preset in preset time has RSU to receive the upper of the OBU transmission in communication zone Row information.
In the multiple antennas associated working system under the multilane free flow that another embodiment provides,
The designating unit, is also used to,
After the first RSU sends downlink information to the OBU, judging unit judges do not have in default communication zone When RSU receives the uplink information that the OBU is sent, the 2nd the first RSU described in distance to a declared goal nearest RSU is sent out to the OBU Send downlink information.
The judging unit, is also used to,
After the 2nd RSU sends downlink information to the OBU, judge whether there is RSU to connect in default communication zone Receive the uplink information that the OBU is sent.
The present embodiment starts the multiple antennas under multilane and combines reception, efficiently solves on the market partially because in OBU transmitting The deviation of row signal is just often resulting in the problem of lane antenna does not receive OBU uplink signal, and it is logical to improve the transaction of OBU vehicle on the whole Believe success rate.The present embodiment can also improve the lane change occurred in multilane free flow process of exchange, jump a queue when OBU Vehicle transaction communications success rate.
Those of ordinary skill in the art will appreciate that: the above embodiments are only used to illustrate the technical solution of the present invention., and It is non-that it is limited；Although present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art It is understood that it is still possible to modify the technical solutions described in the foregoing embodiments, either to part of or All technical features are equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution this hair Bright claim limited range.

Claims (10)

  1. The method 1. a kind of multiple antennas under multilane free flow works together, which is characterized in that when having detected that it is pre- that vehicle drives into If when communication zone, waking up the vehicle carried electronic label OBU of the vehicle, and execute following steps:
    S1, the uplink information sent according to the received OBU of roadside unit RSU more than one in default communication zone, really The location information of the fixed OBU；
    S2, according to the location information of the OBU, the first OBU described in distance to a declared goal nearest RSU sends downlink letter to the OBU Breath；
    S3, judge to preset the uplink information for whether thering is RSU to receive the OBU transmission in communication zone in preset time；If so, Step S1-S3 is then continued to execute, until the sign off of the RSU in the OBU and default communication zone.
  2. 2. the method according to claim 1, wherein being received according to RSU more than one in default communication zone The OBU send uplink information, determine the location information of the OBU, comprising:
    After more than one RSU sends uplink information into default communication zone in the OBU, receive what a RSU was sent First location information, the first location information are that a RSU is obtained according to the uplink information that its received described OBU is sent 's；
    According to the first location information, the location information of the OBU is determined.
  3. 3. the method according to claim 1, wherein being received according to RSU more than one in default communication zone The OBU send uplink information, determine the location information of the OBU, comprising:
    After more than one RSU sends uplink information into default communication zone in the OBU, receive what multiple RSU were sent Multiple second location informations, the multiple second location information are that multiple RSU believe according to the uplink that its received described OBU is sent What breath obtained；
    According to the multiple second location information, the location information of the OBU is determined.
  4. 4. according to the method described in claim 3, determining institute it is characterized in that, described according to the multiple second location information State the location information of OBU, comprising:
    Farthest value and the most recent value in the multiple second location information are removed, obtains removing multiple the second of farthest value most recent value Location information；
    Multiple second location informations of the farthest value most recent value of the removal are averaging, determine the location information of the OBU.
  5. 5. the method according to claim 1, wherein whether judge to preset in communication zone in preset time has RSU receives the uplink information that the OBU is sent, the method also includes:
    If it is not, then the 2nd the first RSU described in distance to a declared goal nearest RSU to the OBU sends downlink information, and when judging default Whether there is RSU to receive the uplink information that the OBU is sent in interior default communication zone.
  6. 6. according to the method described in claim 5, it is characterized in that, it is described judge in preset time preset communication zone in whether There is RSU to receive the uplink information that the OBU is sent, specifically:
    After the first RSU sends downlink information to the OBU, judge whether there is RSU to receive in default communication zone The uplink information that the OBU is sent；
    If it is not, then judge the first RSU to the OBU send downlink information number whether be more than preset times value, if it is not, Then continue to specify the first RSU to send downlink information to the OBU, otherwise, the first RSU described in distance to a declared goal it is nearest second RSU sends downlink information to the OBU.
  7. 7. -6 any method according to claim 1, which is characterized in that the multiple antennas includes single goal positioning antenna RSU combination or the RSU combination of Multi-target position antenna.
  8. 8. a kind of system for the multiple antennas associated working method under the multilane free flow as described in claim 1-7 is any, It is characterized in that, the system comprises:
    Position units, for determining according to the uplink information that the more than one received OBU of RSU is sent in communication zone is preset The location information of the OBU；
    Designating unit, the location information of the OBU for being determined according to the position units, OBU described in distance to a declared goal it is nearest the One RSU sends downlink information to the OBU；
    Whether judging unit, judging to preset in preset time has RSU to receive the uplink letter that the OBU is sent in communication zone Breath.
  9. 9. system according to claim 8, which is characterized in that the designating unit is also used to,
    After the first RSU sends downlink information to the OBU, judging unit judges in default communication zone without RSU When receiving the uplink information that the OBU is sent, under the 2nd the first RSU described in distance to a declared goal nearest RSU is sent to the OBU Row information.
  10. 10. system according to claim 9, which is characterized in that the judging unit is also used to,
    After the 2nd RSU sends downlink information to the OBU, judge whether there is RSU to receive in default communication zone The uplink information that the OBU is sent.
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