CN113132901B - 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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- CN113132901B CN113132901B CN202010027565.4A CN202010027565A CN113132901B CN 113132901 B CN113132901 B CN 113132901B CN 202010027565 A CN202010027565 A CN 202010027565A CN 113132901 B CN113132901 B CN 113132901B
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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
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Abstract
The invention discloses a traffic accident information sending method, a device, equipment and a medium. The method comprises the steps of obtaining first traffic accident information; according to a preset sending strategy, sending first traffic accident information to a mobile terminal in the coverage area of a first road side unit; 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 area of the first road side unit is different from that of the second road side unit. According to the embodiment of the invention, the coverage range of the notification information can be enlarged.
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, a traffic accident information sending device, traffic accident information sending equipment and a computer readable storage medium.
Background
With the development of wireless communication technology (Vehicle to Everything, V2X) for vehicles and cooperative technology of people and vehicle road networks, the acquisition of traffic accident information is not limited to single vehicle perception, and the perception equipment and communication technology of vehicle ends and road ends can be fully utilized to eliminate perception blind areas. V2X is a new generation of information communication technology connecting vehicles to everything, where V stands for vehicles, X stands for any object that interacts with vehicles, and currently X mainly comprises vehicles, people, traffic roadside infrastructure and networks.
In the current traffic accident information sending strategy, the range of information sending is not comprehensive enough, so that partial vehicles or pedestrians affected by the traffic accident cannot learn the traffic accident information.
Disclosure of Invention
The embodiment of the invention provides a traffic accident information sending method, a device, equipment and a computer readable storage medium, which can enlarge the coverage range of information sending and enable the sending mechanism of traffic accident information to be more perfect.
In a first aspect, an embodiment of the present invention provides a traffic accident information sending method, applied to a first road side unit, where the method includes:
acquiring first traffic accident information;
according to a preset sending strategy, sending first traffic accident information to a mobile terminal in the coverage area of a first road side unit;
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 area of the first road side unit is different from that 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 terminals in the coverage area 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 area of the first road side unit is different from that 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 the traffic accident information sending method according to the first aspect.
In a fourth aspect, an embodiment of the present invention provides a computer readable storage medium, where computer program instructions are stored, where the computer program instructions implement the traffic accident information sending method according to the first aspect when executed by a processor.
According to the traffic accident information sending method, device and equipment and the computer readable storage medium, 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 range 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 range 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 range of the second road side unit. According to the embodiment of the invention, 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 timely respond.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are needed to be used in the embodiments of the present invention will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to these drawings without inventive effort.
Fig. 1 is a flow chart of a traffic accident information sending method according to an embodiment of the present invention;
fig. 2 is a flow chart of a traffic accident information sending method according to another embodiment of the present invention;
FIG. 3 is a schematic diagram of a link interface of each terminal according to one embodiment of the present invention;
fig. 4 is a schematic diagram of resources occupied by transmission information according to the first embodiment of the present invention;
fig. 5 is a schematic diagram of resources occupied by transmission information according to a second embodiment of the present invention;
fig. 6 is a schematic diagram of a resource occupied by transmission information according to a third embodiment of the present invention;
fig. 7 is a schematic diagram of a resource occupied by transmission information according to a fourth embodiment of the present invention;
fig. 8 is a schematic diagram of resources occupied by transmission information according to a fifth embodiment of the present invention;
fig. 9 is a schematic diagram of a transmission information occupation resource according to a sixth embodiment of the present invention;
Fig. 10 is a schematic structural view of a traffic accident information transmitting apparatus according to an embodiment of the present invention;
fig. 11 is a schematic structural view of a traffic accident information transmitting apparatus provided in one 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 the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are merely configured to illustrate the invention and are not configured to limit 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 invention by showing examples of the invention.
It is noted that relational terms such as first and second, and the like are 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. Moreover, 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 like elements in a process, method, article or apparatus that comprises the element.
In the prior art, accident influencing objects are limited to other vehicles passing through an accident site, and in actual situations, when traffic jam is caused by the accident, the affected vehicles do not necessarily pass through the accident site, and when the influence range of the accident is enlarged to a roadside or a sidewalk, pedestrians are also affected. Thus, pedestrians or vehicles not passing through the accident site which may be affected cannot respond in time by receiving the notification information.
In addition, in the prior art, notification information is transmitted to all vehicles within a preset range centered on the accident site, which is necessarily smaller than the range covered by V2V transmission, so that when the influence range of the accident is larger than the range that can be covered by V2V transmission, the vehicle not within the coverage area cannot obtain notification information. In addition, in the prior art, the accident level is calculated only through the accident type, namely the influence of the accident on the vehicles in the preset range is the same by default, the judgment is inaccurate, and the setting of the later preset accident level is directly influenced.
To solve at least one of the above technical problems, embodiments of the present invention provide a method, an apparatus, a device, and a computer-readable storage medium for sending traffic accident information. The following first describes a traffic accident information sending method provided by the embodiment of the present invention.
Fig. 1 is a flow chart of a traffic accident information sending method 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 terminals 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 area 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 area of the first road side unit is different from that of the second road side unit.
In some embodiments, traffic accident information may be sent by using a Road Side Unit (RSU) in a V2X scene, and in the context of RSU high-density monitoring and periodic issuing of traffic accident information, in order to inform all affected vehicles of the traffic accident information, the purpose may be achieved by using RSU relay forwarding. 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 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. The coverage of the notification information can be enlarged, so that vehicles or pedestrians affected by the traffic accident can receive the information, and timely respond.
In addition, with the background that the coverage rate of the RSU is gradually increased and the road end sensing equipment is gradually perfected, the monitoring source of the accident information is changed from the vehicle end to the road end, and the efficiency of forwarding the accident information by using the RSU is larger than V2V. And by utilizing the characteristics of RSU high-frequency monitoring and periodic issuing, the issuing time and the issuing period are dynamically adjusted according to actual conditions, and compared with V2V one-time forwarding, the method is more flexible.
Fig. 2 is a flow chart of a traffic accident information sending method 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 security level of first traffic accident information determined based on the position information of a first road side unit; judging whether the first security level is greater than a preset security level threshold value; s20 may specifically include: and if the first security level is greater than the preset security level threshold, sending first traffic accident information to the mobile terminals in the coverage area of the first road side unit according to a preset sending strategy. S30 may specifically include: if the first security level is greater than a preset security 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 based on the first traffic accident information.
Exemplary, the first security level is L, and the preset security level threshold is L th When L is greater than L th And the first road side unit transmits the first traffic accident information.
In some embodiments, before acquiring the first security level of the first traffic accident information determined based on the location information of the first road side unit, the method further comprises: acquiring the distance between the mobile terminal and the accident 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 nearest 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 grade of the first traffic accident information; the method for acquiring the first security level of the first traffic accident information determined based on the position information of the first road side unit specifically comprises the following steps: 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.
Namely, calculating a first security level of accident information by combining the position information of the first RSU and the first traffic accident information type, and when the first security level is greater than a security level threshold value, starting to execute forwarding action by the first RSU; the first RSU performs forwarding action to break the original periodic issuing rule (issuing frequency is f 0 ) And issuing under different scenes with new rules.
The security level is illustratively determined by two factors, time level t and loss level l, respectively. Time t at which the time scale is further enlarged by the influence of traffic accident p The loss level l is determined by the property loss caused by traffic accidents and casualties.
Expression (1) of the time scale t is as follows:
wherein D is min Is the nearest distance from the accident site to the terminal of the vehicle/pedestrian in the coverage area of the first RSU, and can be determined according to the coordinates.
The average speed of the terminal of the nearest vehicle/pedestrian can be obtained through interval speed measurement. According to t p The range of the section where the section is located determines the level t, and the number of the sections and the upper and lower limits of the sections are preset according to the system requirements. Currently, there is an accident grading manner, and the accident grade is classified into a slight accident, a general accident, a major accident and an extra-large accident according to property loss and casualties caused by the accident, and the values of the corresponding l are 1, 2, 3 and 4 respectively. t is t p The smaller the accident security level is, the higher the l is, and the higher the accident security level is. The expression (2) defining the accident security level as L is as follows：
L＝at+bl,(a+b＝1)(2)
The security level threshold L can be determined according to the division mode of t th . The computation of the security level may be done by the RSU itself or by 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 which are further expanded by the accident influence, and the influence of the transmission delay is considered, so that the method is more accurate and convincing compared with the technology which only relies on loss judgment.
In some embodiments, if the first security level is greater than the preset security level threshold, sending, according to a preset sending policy, first traffic accident information to mobile terminals within the coverage area of the first road side unit, including: judging whether second traffic accident information exists at the accident occurrence time of the first traffic accident information, and obtaining a first judgment result; judging whether a second security level of second traffic accident information determined based on the position information of the first road side unit is larger than a preset security level threshold value or not, and obtaining a second judgment result; judging whether the influence time of the second traffic accident information is not finished or not, and obtaining 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 in a 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 all yes, sending the first traffic accident information to the mobile terminal within the preset range according to the second preset sending strategy.
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), different forwarding strategies are corresponding to the security level of the second accident and the security level of the first accident, and the information sending mechanism of the plurality of accidents in the same time period is given by considering the simultaneous existence of the plurality of accidents, so that the accident information sending mechanism is more perfect.
The duration influence time of the first accident is recorded as T1, the time window T1 is divided into a key window, a stable window and a recovery window, and the key window is a key period for issuing the current accident information and cannot be interrupted. The stationary window is an intermediate period of the current accident information delivery, and delivery cannot be stopped, but the delivery speed can be properly reduced. The recovery window is a current accident that also has an impact on the vehicle/pedestrian, but the impact is not large and can be interrupted. The frequency of the issuing of the accident information may be different in different time windows.
In some embodiments, sending the first traffic accident information to the mobile terminal in the coverage area of the first roadside unit according to the first preset sending policy includes: at a first preset frequency f in a first critical time window 3 Transmitting first traffic accident information to the mobile terminal in the coverage area of the first road side unit, and transmitting the first traffic accident information to the mobile terminal in the coverage area of the first road side unit at a second preset frequency f in a first stable time window 2 Transmitting 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 a first recovery time window 1 Transmitting first traffic accident information to a mobile terminal in the coverage area of a first road side unit; wherein f 3 >f 2 >f 1 。
In other embodiments, the sending, according to the first preset sending policy, the first traffic accident information to the mobile terminal in the coverage area of the first roadside unit includes: in a first accident affecting time window of the first traffic accident information, the frequency is set from the upper frequency limit f of the preset frequency range t1 Gradually decreasing to the lower frequency limit f of the frequency range t2 In the method, first traffic accident information is sent to a mobile terminal in the coverage area of a first road side unit; wherein the lower frequency limit f t2 Greater than or equal to the original frequency f 0 。
In still other embodiments, sending the first traffic accident information to the mobile terminal in the coverage area of the first roadside unit according to the first preset sending policy includes: from a first preset threshold f at a frequency in a first critical time window th1 Gradually decreasing to a second preset threshold f th2 In the method, first traffic accident information is sent to a mobile terminal in the coverage area of a first road side unit; from a second preset threshold value at frequency in a first stationary time windowf th2 Gradually decreasing to a third preset threshold f th3 In the method, first traffic accident information is sent to a mobile terminal in the coverage area of a first road side unit; from a third preset threshold f at frequency in a first recovery time window th3 Gradually decrease to the original frequency f 0 In the method, first traffic accident information is sent to a mobile terminal in the coverage area of a first road side unit; wherein the first preset threshold f th1 Is greater than a second preset threshold f th2 A second preset threshold f th2 Is greater than a third preset threshold f th3 A third preset threshold f th3 Greater than or equal to the original frequency f 0 。
For example, only one accident occurs (i.e., the first accident) within the time window T1 of the first accident, and the accident impact range C is within the coverage of the RSU, when the first security level of the first accident is greater than the threshold L th When the RSU sends accident information in time, the original periodic sending rule is broken through by the RSU. The preset influence time window T of the accident can be determined according to the type of the accident, the RSU can continuously issue the higher frequency in the time period T, the issue frequency gradually decreases along with the time, and the final frequency is greater than or equal to the normal issue frequency. The issuing interface may be decided according to the RSU type.
Fig. 3 is a schematic diagram of a link interface of each terminal 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 Uu. Where U represents a user network interface (User to Network interface), U represents Universal.
In some embodiments, sending the first traffic accident information to the mobile terminal within the preset range according to the preset sending policy includes: transmitting first traffic accident information to the mobile terminals in the coverage area of the first road side unit according to a preset transmission strategy by using a broadcast transmitting mode; or, sending the first traffic accident information to the mobile terminal moving to the accident position of the first traffic accident information in the accident influence range of the first traffic accident information according to the preset sending strategy by using a multicast issuing mode.
In the broadcast issuing mode, the terminals of vehicles/pedestrians in the coverage area of the RSU can receive the information, and then perform actions such as speed reduction, lane changing, detouring and the like. In the multicast distribution mode, the message can be received by a vehicle/pedestrian moving to the place where the accident occurs within the accident influence range C, and further actions such as deceleration, lane changing, detouring and the like can be performed.
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 forwards the first traffic accident information to the neighboring RSUs (accident impact directions) at the same time. The RSU receiving the accident information calculates the safety level of the first accident again based on the position information of the RSU and determines the safety level and the threshold value L according to the safety level th Further determines the forwarding action. Recording the RSU receiving the accident information as a second RSU, wherein t is p Is calculated using the average speed and distance of the nearest vehicle/pedestrian terminal from the accident site in the coverage area of the second RSU.
In the above embodiments, the current RSU may be understood as a first RSU and the neighboring RSUs may be understood as a second RSU.
In some embodiments, sending the first traffic accident information to the mobile terminals within the preset range according to the second preset sending policy includes: judging the level of the second security level and the first security level to obtain a judging result; according to the judging result and the position of a second accident influence time window of the second traffic accident information at the occurrence time of the first traffic accident information, sending the first traffic accident information to the mobile terminal in the coverage area of the first road side unit; the second accident influencing time window comprises a second key time window, a second stable time window and a second recovery time window.
And 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, so that the traffic accident information is more reasonable.
In some embodiments, 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, sending the first traffic accident information to the mobile terminal in the coverage area of the first road side unit includes: if the first security level is greater than or equal to the second security level and the occurrence time of the first traffic accident information is in the second key time window, part of resources of the second stable time window and all resources of the second recovery time window are occupied, and the first traffic accident information is sent to the mobile terminal in the coverage area of the first road side unit.
The following first incident may be understood as the incident that is currently occurring, and the second incident may be understood as the last incident that occurs before the first incident.
Fig. 4 and fig. 5 are schematic diagrams of resources occupied by transmission information according to two embodiments of the present invention. As shown in fig. 4 and fig. 5, the first event occurs in the critical window of the second event, the first event needs to wait until the second event critical window ends to start issuing, and occupies part of the resources in the second event stationary window, and occupies all the resources in the second event recovery window. If the first accident is finished and the second accident time window is not finished, continuing to finish the accident information issuing of the second accident; and if the second accident time window is exceeded, the information of the second accident is not issued.
In some embodiments, 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, sending the first traffic accident information to the mobile terminal in the coverage area of the first road side unit includes: if the first security level is greater than or equal to the second security level and the occurrence time of the first traffic accident information is in the second stable time window or the second recovery time window, part of resources occupying the second stable time window and/or all of the resources occupying the second recovery time window immediately send the first traffic accident information to the mobile terminal in the coverage area of the first road side unit.
Fig. 6 and fig. 7 are schematic diagrams of resources occupied by transmission information according to two embodiments of the present invention. As shown in fig. 6 and 7, the first event occurs in a stationary window or a recovery window of the second event, and the first event information can be issued immediately, and issued by using part of resources in the stationary window of the second event, and issued by using all of the resources in the recovery window of the second event. If the first accident is finished and the second accident time window is not finished, continuing to finish the accident information issuing of the second accident; and if the second accident time window is exceeded, the information of the second accident is not issued.
In some embodiments, 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, sending the first traffic accident information to the mobile terminal in the coverage area of the first road side unit includes: if the first security level is smaller than the second security level and the occurrence time of the first traffic accident information is in a second key time window or a second stable time window, after the second traffic accident information reaches a second recovery time window, part of resources occupying the second recovery time window are used for sending the first traffic accident information to the mobile terminals in the coverage area of the first road side unit; if the first security level is smaller than the second security level and the occurrence time of the first traffic accident information is in the second recovery time window, part of resources occupying the second recovery time window immediately send the first traffic accident information to the mobile terminals in the coverage area of the first road side unit.
Fig. 8 and fig. 9 are schematic diagrams of resources occupied by transmission 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 smaller than the second security level of the second accident, the first accident is generated in a key window and a smooth window of the second accident, and the first accident can be issued after waiting for a recovery window of the second accident. The first incident is generated in the recovery window of the second incident, and then the recovery window of the second incident can be issued in time when using part of the resources.
Fig. 10 is a schematic structural view of a traffic accident information transmitting 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 road side unit according to a preset sending policy;
a judging module 803, configured to judge, based on the first traffic accident information, whether an accident impact range of the first traffic accident information is greater than a coverage area of the first road side unit;
the second sending module 804 is configured to send the first traffic accident information to the second road side unit if the accident impact range of the first traffic accident information is greater than the coverage area 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 area of the second road side unit; the coverage area of the first road side unit is different from that of the second road side unit.
In some embodiments, the apparatus further comprises a judging unit for: acquiring a first security level of first traffic accident information determined based on the position information of a first road side unit;
Judging whether the first security level is greater than a preset security level threshold value;
the first sending module 802 specifically is configured to:
if the first security level is greater than a preset security level threshold, sending first traffic accident information to the mobile terminals in the coverage area of the first road side unit according to a preset sending strategy;
the judging module 803 specifically is configured to:
if the first security level is greater than a preset security 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 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 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 nearest 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 grade of the first traffic accident information;
the method for acquiring the first security level of the first traffic accident information determined based on the position information of the first road side unit specifically comprises the following steps:
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, and obtaining a first judgment result;
judging whether a second security level of second traffic accident information determined based on the position information of the first road side unit is larger than a preset security level threshold value or not, and obtaining a second judgment result;
judging whether the influence time of the second traffic accident information is not finished or not, and obtaining 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 in a 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 all yes, sending the first traffic accident information to the mobile terminal within the preset range according to the 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 stationary time window, and a first recovery time window; the first sending module 802 is specifically configured to:
transmitting first traffic accident information to the mobile terminals in the coverage area of the first road side unit at a first preset frequency in a first key time window, transmitting the first traffic accident information to the mobile terminals in the coverage area of the first road side unit at a second preset frequency in a first stable time window, and transmitting the first traffic accident information to the mobile terminals in the coverage area of the first road side unit at a third preset frequency in a first recovery time window; the first preset frequency is larger than the second preset frequency, and the second preset frequency is larger than the third preset frequency.
Alternatively, the first sending module 802 is specifically configured to:
transmitting the first traffic accident information to the mobile terminals within the coverage area of the first road side unit in a manner that the frequency gradually decreases from the upper frequency limit of the preset frequency range to the lower frequency limit of the frequency range in a first accident influence time window of the first traffic accident information; wherein the lower frequency limit is greater than or equal to the original frequency.
Alternatively, the first sending module 802 is specifically configured to:
transmitting first traffic accident information to the mobile terminals in the coverage area of the first road side 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; transmitting first traffic accident information to the mobile terminals in the coverage area of the first road side unit in a mode that the frequency of the first stable time window gradually decreases from the second preset threshold value to the third preset threshold value; transmitting first traffic accident information to the mobile terminals in the coverage area of the first road side unit in a mode that the frequency gradually decreases from a third preset threshold value to the original frequency in the first recovery time window; the first preset threshold value is larger than the second preset threshold value, the second preset threshold value is larger than the third preset threshold value, and the third preset threshold value is larger than or equal to the original frequency.
In some embodiments, the first sending module 802 is specifically configured to:
judging the level of the second security level and the first security level to obtain a judging result;
according to the judging result and the position of a second accident influence time window of the second traffic accident information at the occurrence time of the first traffic accident information, sending the first traffic accident information to the mobile terminal in the coverage area of the first road side unit; the second accident influencing time window comprises a second key time window, a second stable time window and a second recovery time window.
In some embodiments, the first sending module 802 is specifically configured to:
if the first security level is greater than or equal to the second security level and the occurrence time of the first traffic accident information is in the second key time window, part of resources of the second stable time window and all resources of the second recovery time window are occupied, and the first traffic accident information is sent to the mobile terminal in the coverage area of the first road side unit.
In some embodiments, the first sending module 802 is specifically configured to:
if the first security level is greater than or equal to the second security level and the occurrence time of the first traffic accident information is in the second stable time window or the second recovery time window, part of resources occupying the second stable time window and/or all of the resources occupying the second recovery time window immediately send the first traffic accident information to the mobile terminal in the coverage area of the first road side unit.
In some embodiments, the first sending module 802 is specifically configured to:
if the first security level is smaller than the second security level and the occurrence time of the first traffic accident information is in a second key time window or a second stable time window, after the second traffic accident information reaches a second recovery time window, part of resources occupying the second recovery time window are used for sending the first traffic accident information to the mobile terminals in the coverage area of the first road side unit;
if the first security level is smaller than the second security level and the occurrence time of the first traffic accident information is in the second recovery time window, part of resources occupying the second recovery time window immediately send the first traffic accident information to the mobile terminals in the coverage area of the first road side unit.
In some embodiments, the first sending module 802 is specifically configured to:
transmitting first traffic accident information to the mobile terminals in the coverage area of the first road side unit according to a preset transmission strategy by using a broadcast transmitting mode;
or, sending the first traffic accident information to the mobile terminal moving to the accident position of the first traffic accident information in the accident influence range of the first traffic accident information according to the 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 enlarged, so that vehicles or pedestrians affected by the traffic accident can receive the information, and timely respond.
Fig. 11 is a schematic structural diagram of a road side unit device according to an embodiment of the present invention.
The unit device may comprise a processor 301 and a memory 302 storing computer program instructions at the roadside.
In particular, the processor 301 may include a Central Processing Unit (CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured as one or more integrated circuits that implement embodiments of the present invention.
The processor 301 implements any one of the traffic accident information transmission methods of the above embodiments by reading and executing the 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 to each other by a bus 310 and perform communication with each other.
The communication interface 303 is mainly used to implement communication between each module, device, unit and/or apparatus in the embodiment of the present invention.
The road side unit device may execute the traffic accident information sending method in the embodiment of the present invention, thereby implementing the traffic accident information sending method and apparatus described in connection with fig. 1 and 10.
In addition, in combination with the traffic accident information sending method in the above embodiment, the embodiment of the present invention may be implemented by providing a computer readable storage medium. The computer storage medium has stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement any of the traffic accident information transmission methods of the above embodiments.
It should be understood that the invention is not limited to the particular arrangements and instrumentality described above and shown in the drawings. For the sake of brevity, a detailed description of known methods is omitted here. 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 shown, and those skilled in the art can make various changes, modifications and additions, or change the order between steps, after appreciating the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams may be implemented in 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, a plug-in, a 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 over transmission media or communication links by a data signal carried in a carrier wave. A "machine-readable medium" may include any medium that can store or transfer information. Examples of machine-readable media include electronic circuitry, 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 the like. The code segments may be downloaded via computer networks such as the internet, intranets, etc.
It should also be noted that the exemplary embodiments mentioned in this disclosure 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, or may be performed in a different order from the order in the embodiments, or several steps may be performed simultaneously.
In the foregoing, only the specific embodiments of the present invention are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present invention is not limited thereto, and any equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and they should be included in the scope of the present invention.
Claims (12)
1. A traffic accident information transmission method applied to a first road side unit, comprising:
acquiring first traffic accident information;
transmitting the first traffic accident information to a mobile terminal in the coverage area of the first road side unit according to a preset transmission 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 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 area of the first road side unit is different from that of the second road side unit;
before the first traffic accident information is sent to the mobile terminal in the coverage area of the first road side unit according to the preset sending strategy, the method further comprises:
acquiring a first security level of the first traffic accident information determined based on the position information of the first road side unit;
judging whether the first security level is greater than a preset security level threshold;
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 the mobile terminals in the coverage area of the first road side unit according to a preset sending strategy;
Before the acquiring the first security level of the first traffic accident information determined based on the position information of the first road side unit, the method further includes:
acquiring the distance between a mobile terminal and an accident occurrence position of the first traffic accident information and the average speed of the mobile terminal; the mobile terminal is a mobile terminal which is in the coverage area of the first road side unit and is nearest 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 grade of the first traffic accident information;
the acquiring the first security level of the first traffic accident information determined based on the position information of the first road side 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 security grade.
2. The method according to claim 1, wherein the determining, based on the first traffic accident information, whether the accident impact range of the first traffic accident information is greater than the coverage of the first road side unit, specifically includes:
And if the first security level is greater than the preset security 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 based on the first traffic accident information.
3. The method of claim 1, wherein if the first security level is greater than the preset security level threshold, sending the first traffic accident information to the mobile terminals in the coverage area of the first roadside unit according to a preset sending policy comprises:
judging whether second traffic accident information exists at the accident occurrence time of the first traffic accident information or not to obtain a first judgment result;
judging whether a second security level of the second traffic accident information determined based on the position information of the first road side unit is larger than the preset security level threshold value or not, and obtaining a second judgment result;
judging whether the influence time of the second traffic accident information is not finished or not, and obtaining a third judgment result;
if at least one of the first judgment result, the second judgment result and the third judgment result is negative, the first traffic accident information is sent to the mobile terminal in a 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 all yes, the first traffic accident information is sent to the mobile terminal in the preset range according to a second preset sending strategy.
4. The method of claim 3, wherein the first incident impact time window of the first traffic accident information comprises a first critical time window, a first smooth 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 policy includes:
transmitting the first traffic accident information to the mobile terminals in the coverage area of the first road side unit at a first preset frequency in the first key time window, transmitting the first traffic accident information to the mobile terminals in the coverage area of the first road side unit at a second preset frequency in the first stable time window, and transmitting the first traffic accident information to the mobile terminals in the coverage area of the first road side unit at a third preset frequency in the first recovery time window; wherein the first preset frequency is greater than the second preset frequency, which 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 policy includes:
transmitting the first traffic accident information to mobile terminals within the coverage area of the first road side unit in a manner that the frequency gradually decreases from the upper frequency limit of a preset frequency range to the lower frequency limit of the frequency range in a first accident influence time window of the first traffic accident information; 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 policy includes:
transmitting the first traffic accident information to the mobile terminal in the coverage area of the first road side unit in a mode that the frequency of the first key time window gradually decreases from a first preset threshold value to a second preset threshold value; transmitting the first traffic accident information to the mobile terminals in the coverage area of the first road side unit in a mode that the frequency of the first stable time window gradually decreases from the second preset threshold value to a third preset threshold value; transmitting the first traffic accident information to the mobile terminal in the coverage area of the first road side unit in a mode that the frequency of the first recovery time window gradually decreases from the third preset threshold value to the original frequency; 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.
5. The method of claim 3, wherein the transmitting the first traffic accident information to the mobile terminals within the preset range according to the second preset transmission policy comprises:
judging the level of the second security level and the first security level to obtain a judging result;
according to the judging result and the position of the first traffic accident information at the second accident influence time window of the second traffic accident information, the first traffic accident information is sent to the mobile terminal in the coverage area of the first road side unit; the second accident influencing time window comprises a second key time window, a second stable time window and a second recovery time window.
6. The method of claim 5, wherein the sending the first traffic accident information to the mobile terminals 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 comprises:
and if the first security level is greater than or equal to the second security level and the occurrence time of the first traffic accident information is in the second key time window, part of resources of the second stable time window and all resources of the second recovery time window are occupied, and the first traffic accident information is sent to the mobile terminal in the coverage area of the first road side unit.
7. The method of claim 5, wherein the sending the first traffic accident information to the mobile terminals 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 comprises:
and if the first security level is greater than or equal to the second security level and the occurrence time of the first traffic accident information is in the second stable time window or the second recovery time window, the mobile terminal in the coverage area of the first road side unit is sent the first traffic accident information immediately by occupying part of resources of the second stable time window and/or occupying all resources of the second recovery time window.
8. The method of claim 5, wherein the sending the first traffic accident information to the mobile terminals 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 comprises:
If the first security level is smaller than the second security level and the occurrence time of the first traffic accident information is in the second key time window or the second stable time window, after the second traffic accident information reaches the second recovery time window, part of resources occupying the second recovery time window are used for sending the first traffic accident information to the mobile terminals in the coverage area of the first road side unit;
and if the first security level is smaller than the second security level and the occurrence time of the first traffic accident information is in the second recovery time window, part of resources occupying the second recovery time window immediately send the first traffic accident information to the mobile terminals in the coverage area of the first road side unit.
9. 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 policy includes:
transmitting the first traffic accident information to the mobile terminals in the coverage area of the first road side unit according to the preset transmission strategy by using a broadcast transmitting mode;
or sending the first traffic accident information to the mobile terminal moving to the accident position of the first traffic accident information within the accident influence range of the first traffic accident information according to the preset sending strategy by using a multicast sending mode.
10. A traffic accident information transmitting 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 terminals in the coverage area 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 area of the first road side unit is different from that of the second road side unit;
the judging unit is used for acquiring a first security level of the first traffic accident information determined based on the position information of the first road side unit before the first traffic accident information is sent to the mobile terminal in the coverage area of the first road side unit according to a preset sending strategy;
Judging whether the first security level is greater than a preset security level threshold;
the first sending module is specifically configured to:
if the first security level is greater than the preset security level threshold, sending the first traffic accident information to the mobile terminals in the coverage area of the first road side unit according to a preset sending strategy;
the data acquisition module is further configured to:
before the first security level of the first traffic accident information determined based on the position information of the first road side unit is obtained, 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 are obtained; the mobile terminal is a mobile terminal which is in the coverage area of the first road side unit and is nearest 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 grade of the first traffic accident information;
the acquiring the first security level of the first traffic accident information determined based on the position information of the first road side 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 security grade.
11. A roadside unit apparatus, characterized in that the roadside unit apparatus comprises: a processor and a memory storing computer program instructions;
the processor, when executing the computer program instructions, implements the traffic accident information delivery method according to any one of claims 1 to 9.
12. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon computer program instructions, which when executed by a processor, implement the traffic accident information transmission method according to any one of claims 1 to 9.
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| JP2003346266A (en) * | 2002-05-23 | 2003-12-05 | Matsushita Electric Ind Co Ltd | Information providing system, and its device and method |
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