CN113132901A - Traffic accident information sending method, device, equipment and medium - Google Patents
Traffic accident information sending method, device, equipment and medium Download PDFInfo
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- CN113132901A CN113132901A CN202010027565.4A CN202010027565A CN113132901A CN 113132901 A CN113132901 A CN 113132901A CN 202010027565 A CN202010027565 A CN 202010027565A CN 113132901 A CN113132901 A CN 113132901A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/52—Network services specially adapted for the location of the user terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a method, a device, equipment and a medium for transmitting traffic accident information. The method comprises the steps of acquiring first traffic accident information; sending first traffic accident information to a mobile terminal in a coverage area of a first road side unit according to a preset sending strategy; judging whether the accident influence range of the first traffic accident information is larger than the coverage range of the first road side unit or not based on the first traffic accident information; if the accident influence range of the first traffic accident information is larger than the coverage range of the first road side unit, the first traffic accident information is sent to the second road side unit, so that the second road side unit sends the first traffic accident information to the mobile terminal in the coverage range of the second road side unit; the coverage range of the first road side unit is different from the coverage range of the second road side unit. According to the embodiment of the invention, the coverage range of the notification information can be expanded.
Description
Technical Field
The invention belongs to the technical field of communication of the Internet of things, and particularly relates to a traffic accident information sending method, device and equipment and a computer readable storage medium.
Background
With the development of Vehicle to evolution (V2X) and man-Vehicle road network cooperation technology, the acquisition of traffic accident information is not limited to single Vehicle sensing, and sensing devices and communication technologies at Vehicle ends and road ends can be fully utilized to eliminate blind sensing areas. V2X is a new generation of information communication technology that connects vehicles with everything, where V stands for vehicles, X stands for any object that interacts information with vehicles, and X currently contains mainly vehicles, people, traffic side infrastructure and networks.
In the current traffic accident information sending strategy, the information sending range is not comprehensive enough, so that part of vehicles or pedestrians affected by the traffic accident cannot know the traffic accident information.
Disclosure of Invention
Embodiments of the present invention provide a method, an apparatus, a device, and a computer-readable storage medium for transmitting traffic accident information, which can expand a coverage area of information transmission, so that a transmission mechanism of traffic accident information is more complete.
In a first aspect, an embodiment of the present invention provides a method for sending traffic accident information, where the method is applied to a first road side unit, and the method includes:
acquiring first traffic accident information;
sending first traffic accident information to a mobile terminal in a coverage area of a first road side unit according to a preset sending strategy;
judging whether the accident influence range of the first traffic accident information is larger than the coverage range of the first road side unit or not based on the first traffic accident information;
if the accident influence range of the first traffic accident information is larger than the coverage range of the first road side unit, the first traffic accident information is sent to the second road side unit, so that the second road side unit sends the first traffic accident information to the mobile terminal in the coverage range of the second road side unit; the coverage range of the first road side unit is different from the coverage range of the second road side unit.
In a second aspect, an embodiment of the present invention provides a traffic accident information sending apparatus, including:
the data acquisition module is used for acquiring first traffic accident information;
the first sending module is used for sending first traffic accident information to the mobile terminal in the coverage range of the first road side unit according to a preset sending strategy;
the judging module is used for judging whether the accident influence range of the first traffic accident information is larger than the coverage range of the first road side unit or not based on the first traffic accident information;
the second sending module is used for sending the first traffic accident information to the second road side unit if the accident influence range of the first traffic accident information is larger than the coverage range of the first road side unit, so that the second road side unit sends the first traffic accident information to the mobile terminal in the coverage range of the second road side unit; the coverage range of the first road side unit is different from the coverage range of the second road side unit.
In a third aspect, an embodiment of the present invention provides a roadside unit device, including: a processor and a memory storing computer program instructions;
the processor, when executing the computer program instructions, implements a traffic accident information transmission method as described in the first aspect.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which computer program instructions are stored, which, when executed by a processor, implement the traffic accident information transmission method according to the first aspect.
After the first traffic accident information is acquired, the first road side unit sends the first traffic accident information to the mobile terminal in the coverage area of the first road side unit according to a preset sending strategy, and if the accident influence range of the first traffic accident information is larger than the coverage area of the first road side unit, the first traffic accident information is sent to the second road side unit at the same time, so that the second road side unit sends the first traffic accident information to the mobile terminal in the coverage area of the second road side unit. According to the embodiment of the invention, the coverage range of the notification information can be expanded, so that vehicles or pedestrians influenced by the traffic accident can receive the information, and then timely response can be made.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart illustrating a method for transmitting traffic accident information according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a method for transmitting traffic accident information according to another embodiment of the present invention;
fig. 3 is a schematic diagram of link interfaces of terminals according to an embodiment of the present invention;
fig. 4 is a schematic diagram of resources occupied by sending information according to a first embodiment of the present invention;
fig. 5 is a schematic diagram of resources occupied by sending information according to a second embodiment of the present invention;
fig. 6 is a schematic diagram of resources occupied by sending information according to a third embodiment of the present invention;
fig. 7 is a schematic diagram of resources occupied by sending information according to a fourth embodiment of the present invention;
fig. 8 is a schematic diagram of resources occupied by sending information according to a fifth embodiment of the present invention;
fig. 9 is a schematic diagram of resources occupied by sending information according to a sixth embodiment of the present invention;
fig. 10 is a schematic structural view of a traffic accident information transmission apparatus according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a traffic accident information transmission apparatus according to an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the prior art, accident influence objects are limited to other vehicles passing through an accident site, and when traffic jam is caused by an accident, the affected vehicles do not necessarily pass through the accident site, and when the accident influence range is expanded to a roadside or a sidewalk, pedestrians are affected. Therefore, pedestrians who may be affected or vehicles who do not pass through the accident site cannot respond to the notification message in time.
In addition, in the prior art, the notification information is sent to all vehicles within a preset range by taking the accident site as the center, and the preset range is necessarily smaller than the range covered by the transmission of the V2V, so when the influence range of the accident is larger than the range which can be covered by the transmission of the V2V, the vehicles which are not in the coverage range cannot obtain the notification information. In addition, in the prior art, the accident grade is calculated only through the accident type, namely the accident is defaulted to have the same influence on the vehicles in the preset range, the judgment is inaccurate, and the setting of the later preset accident grade is directly influenced.
In order to solve at least one of the above technical problems, embodiments of the present invention provide a traffic accident information transmission method, apparatus, device and computer-readable storage medium. First, a method for transmitting traffic accident information according to an embodiment of the present invention will be described.
Fig. 1 is a flowchart illustrating a method for sending traffic accident information according to an embodiment of the present invention. As shown in fig. 1, the method comprises the steps of:
s10, acquiring first traffic accident information;
s20, sending first traffic accident information to the mobile terminal in the coverage area of the first road side unit according to a preset sending strategy;
s30, judging whether the accident influence range of the first traffic accident information is larger than the coverage range of the first road side unit or not based on the first traffic accident information;
s40, if the accident influence range of the first traffic accident information is larger than the coverage range of the first road side unit, the first traffic accident information is sent to the second road side unit, so that the second road side unit sends the first traffic accident information to the mobile terminal in the coverage range of the second road side unit; the coverage range of the first road side unit is different from the coverage range of the second road side unit.
In some embodiments, the traffic accident information may be sent by a Road Side Unit (RSU) in a V2X scenario, and in order to notify all affected vehicles of the traffic accident information under the background of RSU high-density monitoring and periodic traffic accident information delivery, the RSU relay forwarding may be used to achieve the purpose. According to the embodiment of the invention, after the first traffic accident information is acquired, the first road side unit sends the first traffic accident information to the mobile terminals in the coverage area of the first road side unit according to the preset sending strategy, and if the accident influence range of the first traffic accident information is larger than the coverage area of the first road side unit, the first traffic accident information is sent to the second road side unit at the same time, so that the second road side unit sends the first traffic accident information to the mobile terminals in the coverage area of the second road side unit. The coverage range of the notification information can be enlarged, so that vehicles or pedestrians affected by the traffic accident can receive the information, and then timely response can be made.
In addition, with the background that the coverage rate of the RSU is gradually increased and the road end sensing equipment is gradually improved, the monitoring source of the accident information is turned to the road end from the vehicle end, and the efficiency of forwarding the accident information by using the RSU is higher than V2V. And by utilizing the characteristics of high-frequency monitoring and periodic issuing of the RSU, the issuing time and the issuing period are dynamically adjusted according to the actual situation, and compared with V2V, the method is more flexible in one-time forwarding.
Fig. 2 is a flowchart illustrating a method for sending traffic accident information according to another embodiment of the present invention. Referring to fig. 1 and 2 in combination, in some embodiments, before S20, the method may further include: acquiring a first safety level of first traffic accident information determined based on the position information of the first road side unit; judging whether the first safety level is greater than a preset safety level threshold value or not; s20 may specifically include: and if the first safety level is greater than the preset safety level threshold, sending first traffic accident information to the mobile terminal in the coverage range of the first road side unit according to a preset sending strategy. S30 may specifically include: and if the first safety level is greater than the preset safety level threshold, judging whether the accident influence range of the first traffic accident information is greater than the coverage range of the first road side unit or not based on the first traffic accident information.
Illustratively, the first security level is L, and the preset security level threshold is LthWhen L is greater than LthThen, the first road side unit sends the first traffic accident information.
In some embodiments, prior to obtaining the first security level of the first traffic accident information determined based on the location information of the first roadside unit, the method further comprises: acquiring the distance between the mobile terminal and the accident occurrence position of the first traffic accident information and the average speed of the mobile terminal; the mobile terminal is in the coverage area of the first road side unit and is closest to the accident occurrence position of the first traffic accident information; calculating the ratio of the distance to the average speed to obtain the time level of the first traffic accident information; acquiring a first safety level of first traffic accident information determined based on the position information of the first road side unit, specifically including: and carrying out weighted summation on the time grade and the loss grade of the first traffic accident information to obtain a first safety grade.
Calculating a first safety level of accident information by combining position information of the first RSU and the type of the first traffic accident information, and when the first safety level is greater than a safety level threshold value, the first RSU starts to execute forwarding action; the first RSU executing the forwarding action breaks the original periodic issuing rule (the issuing frequency is f)0) And issuing the data according to a new rule under different scenes.
Illustratively, the security level is determined by two factors, time level t and loss level l, respectively. Time t with time scale further extended by traffic accident influencepThe loss level l is determined by property loss and casualty caused by traffic accidents.
The expression (1) of the temporal level t is as follows:
wherein D isminThe distance of the terminal of the vehicle/pedestrian within the coverage of the first RSU from the accident site can be determined from the coordinates.
The average speed of the terminal of the nearest vehicle/pedestrian can be obtained by measuring the speed in an interval. According to tpThe range of the section determines the grade t, the number of the sections and the zoneThe upper and lower limits are preset according to the system requirements. At present, an accident grade division mode is adopted, the accident grade is divided into a light accident, a general accident, a major accident and a super-major accident according to the property loss and the casualty condition caused by the accident, and the values of l are respectively 1, 2, 3 and 4. t is tpThe smaller the accident safety level, the higher the l, the higher the accident safety level. Expression (2) with the accident safety level defined as L is as follows:
L＝at+bl,(a+b＝1)(2)
the safety level threshold value L can be determined according to the division mode of tth. The calculation of the security level can be completed by the RSU or a multi-level cloud server.
According to the embodiment of the invention, the safety level is calculated by utilizing the time level and the loss level of further expanding the accident influence, and because the influence of the transmission delay is considered, the method is more accurate and convincing compared with the technology only depending on loss judgment.
In some embodiments, if the first security level is greater than the preset security level threshold, sending the first traffic accident information to the mobile terminal in the coverage area of the first roadside unit according to a preset sending policy, including: judging whether second traffic accident information exists at the accident occurrence time of the first traffic accident information to obtain a first judgment result; judging whether a second safety level of second traffic accident information determined based on the position information of the first road side unit is greater than a preset safety level threshold value or not to obtain a second judgment result; judging whether the influence time of the second traffic accident information is not finished or not to obtain a third judgment result; if at least one of the first judgment result, the second judgment result and the third judgment result is negative, sending first traffic accident information to the mobile terminal within the preset range according to a first preset sending strategy; and if the first judgment result, the second judgment result and the third judgment result are yes, sending the first traffic accident information to the mobile terminal within the preset range according to a second preset sending strategy.
The current accident is recorded as a first accident, if other accidents occur (namely the previous accident is recorded as a second accident, and the security level of the second accident is higher than a threshold value), when the security level of the second accident and the security level of the first accident have different sizes, different forwarding strategies are corresponded, and the information sending mechanism with a plurality of accidents in the same time period is given out in consideration of the condition that a plurality of accidents exist at the same time, so that the accident information sending mechanism is more perfect.
The duration influence time of the first accident is recorded as T1, and the time window T1 is divided into a key window, a stable window and a recovery window, wherein the key window is a key period of current accident information issuing and cannot be interrupted. The stability window is the middle period of the current accident information issuing, the issuing cannot be stopped, but the issuing speed can be properly reduced. The recovery window is the current accident and also has an impact on the vehicle/pedestrian, but the impact is not so great and can be interrupted. The frequency of sending the accident information can be different in different time windows.
In some embodiments, transmitting the first traffic accident information to the mobile terminals within the coverage of the first roadside unit according to a first preset transmission policy includes: in the first critical time window with the first preset frequency f3Sending first traffic accident information to the mobile terminal in the coverage area of the first road side unit, and using a second preset frequency f in the first smooth time window2Sending first traffic accident information to the mobile terminal in the coverage area of the first road side unit, and using a third preset frequency f in the first recovery time window1Sending first traffic accident information to a mobile terminal within the coverage of a first roadside unit; wherein f is3>f2>f1。
In some embodiments, the transmitting the first traffic accident information to the mobile terminal in the coverage area of the first roadside unit according to a first preset transmission policy includes: in a first accident influence time window of the first traffic accident information, the frequency is from the upper frequency limit f of the preset frequency ranget1Gradually decreasing to a lower frequency limit f of the frequency ranget2The method comprises the steps of sending first traffic accident information to a mobile terminal within the coverage area of a first road side unit; wherein, the lower limit of frequency ft2Greater than or equal to the original frequency f0。
In still other embodimentsIn the method, sending first traffic accident information to a mobile terminal in a coverage area of a first road side unit according to a first preset sending strategy, the method includes: at a first critical time window with frequency from a first preset threshold fth1Gradually decreases to a second preset threshold fth2The method comprises the steps of sending first traffic accident information to a mobile terminal within the coverage area of a first road side unit; from a second predetermined threshold f at a frequency in a first flat time windowth2Gradually decreases to a third preset threshold fth3The method comprises the steps of sending first traffic accident information to a mobile terminal within the coverage area of a first road side unit; from a third preset threshold f in frequency in a first recovery time windowth3Gradually decreasing to the original frequency f0The method comprises the steps of sending first traffic accident information to a mobile terminal within the coverage area of a first road side unit; wherein, the first preset threshold fth1Greater than a second predetermined threshold fth2Second predetermined threshold fth2Greater than a third preset threshold fth3Third predetermined threshold fth3Greater than or equal to the original frequency f0。
Illustratively, only one accident occurs within the time window T1 of the first accident (i.e., the first accident), and the accident-impact-range C is within the RSU coverage when the first safety-level of the first accident is greater than the threshold LthAnd in time, the RSU breaks the original periodic issuing rule and immediately issues accident information. The preset influence time window T of the accident can be determined according to the accident type, the RSU can continuously transmit the higher frequency in the time period T, the transmission frequency is gradually reduced along with the time, and finally the frequency is larger than or equal to the normal transmission frequency. The issuing interface can be decided according to the RSU type.
Fig. 3 is a schematic diagram of link interfaces of terminals according to an embodiment of the present invention. As shown in fig. 3, the user-type RSU is issued using the PC5, and the base-station-type RSU is issued using the Uu. Wherein, U represents a User to Network interface (User to Network interface), and U represents a Universal (Universal).
In some embodiments, transmitting the first traffic accident information to the mobile terminals within the preset range according to the preset transmission strategy includes: sending first traffic accident information to a mobile terminal in a coverage range of a first road side unit according to a preset sending strategy by using a broadcast sending mode; or sending the first traffic accident information to the mobile terminal within the accident influence range of the first traffic accident information and moving to the accident occurrence position of the first traffic accident information according to a preset sending strategy by using a multicast issuing mode.
Under the broadcast issuing mode, the terminals of the vehicles/pedestrians in the RSU coverage range can receive the information, and then the actions of speed reduction, lane changing, bypassing and the like are performed. In the multicast issuing mode, vehicles/pedestrians moving to the accident site within the accident influence range C can receive the message and then perform actions such as deceleration, lane change, detour and the like.
Illustratively, only one incident occurs within the time window T of the first incident, while the first incident impact range C is outside the current RSU coverage. The current RSU simultaneously forwards the first traffic accident information to the neighboring RSU (accident impact direction). The RSU receiving the accident information recalculates the security level of the first accident based on its own position information and according to the redetermined security level and the threshold value LthFurther determines the forwarding action. The RSU receiving the accident information is recorded as a second RSU, and t is at the momentpIs calculated using the average speed and distance of the terminals of the closest vehicle/pedestrian within the coverage area of the second RSU to the accident site.
In the above embodiments, the current RSU may be understood as the first RSU, and the neighboring RSU may be understood as the second RSU.
In some embodiments, the transmitting the first traffic accident information to the mobile terminals within the preset range according to the second preset transmission strategy includes: judging the second safety level and the first safety level to obtain a judgment result; according to the judgment result and the position of the occurrence moment of the first traffic accident information in a second accident influence time window of the second traffic accident information, sending the first traffic accident information to the mobile terminal in the coverage range of the first road side unit; the second accident influence time window comprises a second key time window, a second smooth time window and a second recovery time window.
The traffic accident information is sent according to the safety level conditions of the first traffic accident and the second traffic accident and the condition that the second accident affects the time window, and the method is more reasonable.
In some embodiments, the sending the first traffic accident information to the mobile terminal in the coverage area of the first roadside unit according to the determination result and the position of the occurrence time of the first traffic accident information in the second accident influence time window of the second traffic accident information includes: and if the first safety level is greater than or equal to the second safety level and the occurrence moment of the first traffic accident information is in the second key time window, transmitting the first traffic accident information to the mobile terminal in the coverage range of the first road side unit by occupying partial resources of the second smooth time window and all resources of the second recovery time window.
The first incident described below may be understood as a current incident, and the second incident may be understood as a previous incident that occurred before the first incident.
Fig. 4 and 5 are schematic diagrams of resources occupied by sending information according to two embodiments of the present invention. As shown in fig. 4 and 5, the first accident occurs in the key window of the second accident, and the first accident needs to wait until the key window of the second accident is finished before issuing, and occupies part of the resources in the second accident smoothing window, and occupies all the resources in the second accident recovery window. If the second accident time window is not finished when the first accident is finished, continuing to finish the issuing of the accident information of the second accident; and if the time window exceeds the second accident time window, the information issuing of the second accident is not carried out any more.
In some embodiments, the sending the first traffic accident information to the mobile terminal in the coverage area of the first roadside unit according to the determination result and the position of the occurrence time of the first traffic accident information in the second accident influence time window of the second traffic accident information includes: and if the first safety level is greater than or equal to the second safety level and the occurrence moment of the first traffic accident information is in the second smooth time window or the second recovery time window, immediately sending the first traffic accident information to the mobile terminal in the coverage range of the first road side unit by occupying part of resources of the second smooth time window and/or occupying all resources of the second recovery time window.
Fig. 6 and fig. 7 are schematic diagrams of resources occupied by sending information according to two embodiments of the present invention. As shown in fig. 6 and 7, the first accident occurs in the stability window or the recovery window of the second accident, and the first accident information can be issued immediately, and the first accident information is issued in the stability window of the second accident by using a part of resources, and the second accident information is issued in the recovery window of the second accident by using all resources. If the second accident time window is not finished when the first accident is finished, continuing to finish the issuing of the accident information of the second accident; and if the time window exceeds the second accident time window, the information issuing of the second accident is not carried out any more.
In some embodiments, the sending the first traffic accident information to the mobile terminal in the coverage area of the first roadside unit according to the determination result and the position of the occurrence time of the first traffic accident information in the second accident influence time window of the second traffic accident information includes: if the first safety level is less than the second safety level and the occurrence time of the first traffic accident information is in a second key time window or a second smooth time window, after the second traffic accident information reaches a second recovery time window, occupying partial resources of the second recovery time window to send the first traffic accident information to the mobile terminal in the coverage range of the first road side unit; and if the first safety level is less than the second safety level and the occurrence moment of the first traffic accident information is in the second recovery time window, immediately sending the first traffic accident information to the mobile terminal in the coverage range of the first road side unit by using partial resources occupying the second recovery time window.
Fig. 8 and fig. 9 are schematic diagrams of resources occupied by sending information according to two embodiments of the present invention. As shown in fig. 8 and 9, the first security level of the first accident is lower than the second security level of the second accident, and the first accident is generated in the key window and the smooth window of the second accident, and the first accident needs to wait until the recovery window of the second accident can use part of resources to start issuing. The first accident is generated in the recovery window of the second accident, and can be immediately issued by using partial resources in the recovery window of the second accident.
Fig. 10 is a schematic structural diagram of a traffic accident information transmission apparatus according to an embodiment of the present invention. As shown in fig. 10, the apparatus includes the following modules:
a data acquisition module 801, configured to acquire first traffic accident information;
a first sending module 802, configured to send first traffic accident information to a mobile terminal in a coverage area of a first roadside unit according to a preset sending policy;
a judging module 803, configured to judge, based on the first traffic accident information, whether an accident influence range of the first traffic accident information is larger than a coverage range of the first roadside unit;
a second sending module 804, configured to send the first traffic accident information to the second roadside unit if the accident influence range of the first traffic accident information is greater than the coverage range of the first roadside unit, so that the second roadside unit sends the first traffic accident information to the mobile terminal in the coverage range of the second roadside unit; the coverage range of the first road side unit is different from the coverage range of the second road side unit.
In some embodiments, the apparatus further comprises a determining unit configured to: acquiring a first safety level of first traffic accident information determined based on the position information of the first road side unit;
judging whether the first safety level is greater than a preset safety level threshold value or not;
the first sending module 802 is specifically configured to:
if the first safety level is greater than a preset safety level threshold value, first traffic accident information is sent to the mobile terminal in the coverage range of the first road side unit according to a preset sending strategy;
the determining module 803 is specifically configured to:
and if the first safety level is greater than the preset safety level threshold, judging whether the accident influence range of the first traffic accident information is greater than the coverage range of the first road side unit or not based on the first traffic accident information.
In some embodiments, the data acquisition module 801 is further configured to:
acquiring the distance between the mobile terminal and the accident occurrence position of the first traffic accident information and the average speed of the mobile terminal; the mobile terminal is in the coverage area of the first road side unit and is closest to the accident occurrence position of the first traffic accident information;
calculating the ratio of the distance to the average speed to obtain the time level of the first traffic accident information;
acquiring a first safety level of first traffic accident information determined based on the position information of the first road side unit, specifically including:
and carrying out weighted summation on the time grade and the loss grade of the first traffic accident information to obtain a first safety grade.
In some embodiments, the first sending module 802 is specifically configured to:
judging whether second traffic accident information exists at the accident occurrence time of the first traffic accident information to obtain a first judgment result;
judging whether a second safety level of second traffic accident information determined based on the position information of the first road side unit is greater than a preset safety level threshold value or not to obtain a second judgment result;
judging whether the influence time of the second traffic accident information is not finished or not to obtain a third judgment result;
if at least one of the first judgment result, the second judgment result and the third judgment result is negative, sending first traffic accident information to the mobile terminal within the preset range according to a first preset sending strategy;
and if the first judgment result, the second judgment result and the third judgment result are yes, sending the first traffic accident information to the mobile terminal within the preset range according to a second preset sending strategy.
In some embodiments, the first incident impact time window of the first traffic accident information includes a first critical time window, a first smoothing time window, and a first recovery time window; the first sending module 802 is specifically configured to:
sending first traffic accident information to a mobile terminal in the coverage range of a first road side unit at a first key time window by a first preset frequency, sending the first traffic accident information to the mobile terminal in the coverage range of the first road side unit at a first stable time window by a second preset frequency, and sending the first traffic accident information to the mobile terminal in the coverage range of the first road side unit at a first recovery time window by a third preset frequency; the first preset frequency is greater than the second preset frequency, and the second preset frequency is greater than the third preset frequency.
Alternatively, the first sending module 802 is specifically configured to:
in a first accident influence time window of the first traffic accident information, sending the first traffic accident information to the mobile terminal in the coverage of the first road side unit in a mode that the frequency is gradually reduced from the upper frequency limit of the preset frequency range to the lower frequency limit of the frequency range; wherein the lower frequency limit is greater than or equal to the original frequency.
Alternatively, the first sending module 802 is specifically configured to:
sending first traffic accident information to the mobile terminal in the coverage range of the first road side unit in a mode that the frequency is gradually reduced from a first preset threshold value to a second preset threshold value in a first key time window; sending first traffic accident information to the mobile terminal in the coverage range of the first road side unit in a mode that the frequency is gradually reduced from a second preset threshold value to a third preset threshold value in the first smooth time window; sending first traffic accident information to the mobile terminal in the coverage range of the first road side unit in a mode that the frequency is gradually reduced from a third preset threshold value to the original frequency in a first recovery time window; the first preset threshold is greater than a second preset threshold, the second preset threshold is greater than a third preset threshold, and the third preset threshold is greater than or equal to the original frequency.
In some embodiments, the first sending module 802 is specifically configured to:
judging the second safety level and the first safety level to obtain a judgment result;
according to the judgment result and the position of the occurrence moment of the first traffic accident information in a second accident influence time window of the second traffic accident information, sending the first traffic accident information to the mobile terminal in the coverage range of the first road side unit; the second accident influence time window comprises a second key time window, a second smooth time window and a second recovery time window.
In some embodiments, the first sending module 802 is specifically configured to:
and if the first safety level is greater than or equal to the second safety level and the occurrence moment of the first traffic accident information is in the second key time window, transmitting the first traffic accident information to the mobile terminal in the coverage range of the first road side unit by occupying partial resources of the second smooth time window and all resources of the second recovery time window.
In some embodiments, the first sending module 802 is specifically configured to:
and if the first safety level is greater than or equal to the second safety level and the occurrence moment of the first traffic accident information is in the second smooth time window or the second recovery time window, immediately sending the first traffic accident information to the mobile terminal in the coverage range of the first road side unit by occupying part of resources of the second smooth time window and/or occupying all resources of the second recovery time window.
In some embodiments, the first sending module 802 is specifically configured to:
if the first safety level is less than the second safety level and the occurrence time of the first traffic accident information is in a second key time window or a second smooth time window, after the second traffic accident information reaches a second recovery time window, occupying partial resources of the second recovery time window to send the first traffic accident information to the mobile terminal in the coverage range of the first road side unit;
and if the first safety level is less than the second safety level and the occurrence moment of the first traffic accident information is in the second recovery time window, immediately sending the first traffic accident information to the mobile terminal in the coverage range of the first road side unit by using partial resources occupying the second recovery time window.
In some embodiments, the first sending module 802 is specifically configured to:
sending first traffic accident information to a mobile terminal in a coverage range of a first road side unit according to a preset sending strategy by using a broadcast sending mode;
or sending the first traffic accident information to the mobile terminal within the accident influence range of the first traffic accident information and moving to the accident occurrence position of the first traffic accident information according to a preset sending strategy by using a multicast issuing mode.
According to the traffic accident information sending device provided by the embodiment of the invention, after the first traffic accident information is obtained, the first road side unit sends the first traffic accident information to the mobile terminals in the coverage area of the first road side unit according to the preset sending strategy, and if the accident influence range of the first traffic accident information is larger than the coverage area of the first road side unit, the first traffic accident information is sent to the second road side unit at the same time, so that the second road side unit sends the first traffic accident information to the mobile terminals in the coverage area of the second road side unit. According to the embodiment of the invention, the coverage range of the notification information can be expanded, so that vehicles or pedestrians influenced by the traffic accident can receive the information, and then timely response can be made.
Fig. 11 is a schematic structural diagram of a roadside unit device according to an embodiment of the present invention.
The roadside unit device may include a processor 301 and a memory 302 storing computer program instructions.
In particular, the processor 301 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured as one or more Integrated circuits implementing embodiments of the present invention.
The processor 301 realizes any one of the traffic accident information transmission methods in the above-described embodiments by reading and executing computer program instructions stored in the memory 302.
In one example, the roadside unit device may also include a communication interface 303 and a bus 310. As shown in fig. 3, the processor 301, the memory 302, and the communication interface 303 are connected via a bus 310 to complete communication therebetween.
The communication interface 303 is mainly used for implementing communication between modules, apparatuses, units and/or devices in the embodiment of the present invention.
The road side unit device may perform the traffic accident information transmission method in the embodiment of the present invention, thereby implementing the traffic accident information transmission method and apparatus described in conjunction with fig. 1 and 10.
In addition, in combination with the method for sending traffic accident information in the above embodiments, embodiments of the present invention may be implemented by providing a computer-readable storage medium. The computer storage medium having computer program instructions stored thereon; the computer program instructions, when executed by a processor, implement any of the traffic accident information transmission methods of the above embodiments.
It is to be understood that the invention is not limited to the specific arrangements and instrumentality described above and shown in the drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions or change the order between the steps after comprehending the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
It should also be noted that the exemplary embodiments mentioned in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
As described above, only the specific embodiments of the present invention are provided, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (13)
1. A method for sending traffic accident information, which is applied to a first road side unit, is characterized by comprising the following steps:
acquiring first traffic accident information;
sending the first traffic accident information to a mobile terminal in the coverage range of the first road side unit according to a preset sending strategy;
judging whether the accident influence range of the first traffic accident information is larger than the coverage range of the first road side unit or not based on the first traffic accident information;
if the accident influence range of the first traffic accident information is larger than the coverage range of the first road side unit, sending the first traffic accident information to a second road side unit so that the second road side unit sends the first traffic accident information to a mobile terminal in the coverage range of the second road side unit; the coverage range of the first road side unit is different from the coverage range of the second road side unit.
2. The method according to claim 1, wherein before the transmitting the first traffic accident information to the mobile terminals within the coverage of the first roadside unit according to a preset transmission strategy, the method further comprises:
acquiring a first safety level of the first traffic accident information determined based on the position information of the first road side unit;
judging whether the first safety level is greater than a preset safety level threshold value or not;
the sending the first traffic accident information to the mobile terminal in the coverage area of the first road side unit according to a preset sending strategy specifically includes:
if the first security level is greater than the preset security level threshold, sending the first traffic accident information to a mobile terminal in the coverage area of the first road side unit according to a preset sending strategy;
the determining whether the accident influence range of the first traffic accident information is larger than the coverage range of the first road side unit based on the first traffic accident information specifically includes:
if the first safety level is larger than the preset safety level threshold, judging whether the accident influence range of the first traffic accident information is larger than the coverage range of the first road side unit or not based on the first traffic accident information.
3. The method of claim 2, wherein prior to the obtaining the first security level of the first traffic accident information determined based on the location information of the first roadside unit, the method further comprises:
acquiring the distance between a mobile terminal and the accident occurrence position of the first traffic accident information and the average speed of the mobile terminal; the mobile terminal is in the coverage range of the first road side unit and is closest to the accident occurrence position of the first traffic accident information;
calculating the ratio of the distance to the average speed to obtain the time level of the first traffic accident information;
the acquiring of the first safety level of the first traffic accident information determined based on the position information of the first roadside unit specifically includes:
and carrying out weighted summation on the time grade and the loss grade of the first traffic accident information to obtain the first safety grade.
4. The method according to claim 2, wherein if the first security level is greater than the preset security level threshold, sending the first traffic accident information to a mobile terminal in a coverage area of the first roadside unit according to a preset sending policy, includes:
judging whether second traffic accident information exists at the accident occurrence time of the first traffic accident information to obtain a first judgment result;
judging whether a second safety level of the second traffic accident information determined based on the position information of the first road side unit is greater than the preset safety level threshold value or not to obtain a second judgment result;
judging whether the influence time of the second traffic accident information is not finished or not to obtain a third judgment result;
if at least one of the first judgment result, the second judgment result and the third judgment result is negative, sending the first traffic accident information to the mobile terminal within the preset range according to the first preset sending strategy;
and if the first judgment result, the second judgment result and the third judgment result are yes, sending the first traffic accident information to the mobile terminal within the preset range according to the second preset sending strategy.
5. The method of claim 4, wherein the first incident impact time window of the first traffic accident information comprises a first critical time window, a first smoothing time window, and a first recovery time window;
the sending the first traffic accident information to the mobile terminal in the coverage area of the first road side unit according to the first preset sending strategy comprises:
sending the first traffic accident information to the mobile terminals in the coverage range of the first road side unit at a first preset frequency in the first key time window, sending the first traffic accident information to the mobile terminals in the coverage range of the first road side unit at a second preset frequency in the first smooth time window, and sending the first traffic accident information to the mobile terminals in the coverage range of the first road side unit at a third preset frequency in the first recovery time window; the first preset frequency is greater than the second preset frequency, and the second preset frequency is greater than the third preset frequency;
or, the sending the first traffic accident information to the mobile terminal in the coverage area of the first road side unit according to the first preset sending strategy includes:
in a first accident influence time window of the first traffic accident information, sending the first traffic accident information to mobile terminals in the coverage area of the first road side unit in a mode that the frequency is gradually reduced from the upper frequency limit of a preset frequency range to the lower frequency limit of the frequency range; wherein the lower frequency limit is greater than or equal to the original frequency;
or, the sending the first traffic accident information to the mobile terminal in the coverage area of the first road side unit according to the first preset sending strategy includes:
sending the first traffic accident information to the mobile terminal in the coverage range of the first roadside unit in a mode that the frequency of the first key time window is gradually reduced from a first preset threshold value to a second preset threshold value; sending the first traffic accident information to the mobile terminal within the coverage range of the first roadside unit in a mode that the frequency of the first smooth time window is gradually reduced from the second preset threshold value to a third preset threshold value; sending the first traffic accident information to the mobile terminals within the coverage range of the first road side unit in a mode that the frequency is gradually reduced from the third preset threshold value to the original frequency in the first recovery time window; the first preset threshold is greater than the second preset threshold, the second preset threshold is greater than the third preset threshold, and the third preset threshold is greater than or equal to the original frequency.
6. The method according to claim 4, wherein the transmitting the first traffic accident information to the mobile terminals within the preset range according to the second preset transmission strategy comprises:
judging the second security level and the first security level to obtain a judgment result;
according to the judgment result and the position of the occurrence moment of the first traffic accident information in a second accident influence time window of the second traffic accident information, sending the first traffic accident information to a mobile terminal in the coverage range of the first road side unit; wherein the second accident impact time window comprises a second critical time window, a second settling time window, and a second recovery time window.
7. The method according to claim 6, wherein the sending the first traffic accident information to the mobile terminal within the coverage of the first roadside unit according to the determination result and the position of the occurrence time of the first traffic accident information in the second accident influence time window of the second traffic accident information comprises:
and if the first safety level is greater than or equal to the second safety level and the occurrence time of the first traffic accident information is in the second key time window, occupying partial resources of the second smooth time window and all resources of the second recovery time window to send the first traffic accident information to the mobile terminal in the coverage range of the first road side unit.
8. The method according to claim 6, wherein the sending the first traffic accident information to the mobile terminal within the coverage of the first roadside unit according to the determination result and the position of the occurrence time of the first traffic accident information in the second accident influence time window of the second traffic accident information comprises:
and if the first safety level is greater than or equal to the second safety level and the occurrence time of the first traffic accident information is in the second smooth time window or the second recovery time window, immediately sending the first traffic accident information to the mobile terminal in the coverage range of the first road side unit by occupying partial resources of the second smooth time window and/or occupying all resources of the second recovery time window.
9. The method according to claim 6, wherein the sending the first traffic accident information to the mobile terminal within the coverage of the first roadside unit according to the determination result and the position of the occurrence time of the first traffic accident information in the second accident influence time window of the second traffic accident information comprises:
if the first safety level is smaller than the second safety level and the occurrence time of the first traffic accident information is in the second key time window or the second smooth time window, after the second traffic accident information reaches the second recovery time window, occupying partial resources of the second recovery time window to send the first traffic accident information to the mobile terminal in the coverage range of the first road side unit;
and if the first safety level is smaller than the second safety level and the occurrence time of the first traffic accident information is in the second recovery time window, immediately sending the first traffic accident information to the mobile terminal in the coverage range of the first road side unit by using partial resources occupying the second recovery time window.
10. The method according to claim 1, wherein the transmitting the first traffic accident information to the mobile terminals within a preset range according to a preset transmission strategy comprises:
sending the first traffic accident information to the mobile terminal in the coverage range of the first road side unit according to the preset sending strategy by using a broadcast sending mode;
or sending the first traffic accident information to a mobile terminal which is within the accident influence range of the first traffic accident information and moves to the accident occurrence position of the first traffic accident information according to the preset sending strategy by using a multicast sending mode.
11. A traffic accident information transmission apparatus, characterized in that the apparatus comprises:
the data acquisition module is used for acquiring first traffic accident information;
the first sending module is used for sending the first traffic accident information to the mobile terminal in the coverage range of the first road side unit according to a preset sending strategy;
the judging module is used for judging whether the accident influence range of the first traffic accident information is larger than the coverage range of the first road side unit or not based on the first traffic accident information;
the second sending module is used for sending the first traffic accident information to a second road side unit if the accident influence range of the first traffic accident information is larger than the coverage range of the first road side unit, so that the second road side unit sends the first traffic accident information to a mobile terminal in the coverage range of the second road side unit; the coverage range of the first road side unit is different from the coverage range of the second road side unit.
12. A RSU apparatus, comprising: a processor and a memory storing computer program instructions;
the processor, when executing the computer program instructions, implements a traffic accident information transmission method according to any one of claims 1-10.
13. A computer-readable storage medium, having computer program instructions stored thereon, which, when executed by a processor, implement the traffic accident information transmission method according to any one of claims 1 to 10.
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