CN109962744B - C-V2V resource allocation method and device - Google Patents
C-V2V resource allocation method and device Download PDFInfo
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- CN109962744B CN109962744B CN201910137906.0A CN201910137906A CN109962744B CN 109962744 B CN109962744 B CN 109962744B CN 201910137906 A CN201910137906 A CN 201910137906A CN 109962744 B CN109962744 B CN 109962744B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
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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]
Abstract
The invention provides a resource allocation method and device for a C-V2V vehicle. The method comprises the following steps: compiling the C-V2V vehicles to form a C-V2V vehicle fleet and determining the head vehicle of the C-V2V vehicle fleet; enabling the head vehicles of the C-V2V motorcade to carry out channel access through an LBT mechanism, and after the channel access, carrying out resource allocation on the accessed head vehicles of the C-V2V motorcade by a base station; after the head vehicle of the C-V2V motorcade receives the information of resource allocation sent by the base station, the head vehicle of the C-V2V motorcade transmits the information of resource allocation to the members of the C-V2V motorcade, so that the members can communicate in a channel accessed by the head vehicle of the C-V2V motorcade according to the information of resource allocation. The invention uses the motorcade as a unit to access the channel, can reduce the number of competitors accessed by the channel, reduce the collision probability and increase the probability of successful transmission. After the head vehicle obtains the access channel, the resource allocation information is transmitted to the head vehicle, and is transmitted to the fleet members through the head vehicle, so that communication conflict in the fleet is avoided, and the unauthorized frequency spectrum utilization rate is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of vehicle networking, in particular to a resource allocation method and device of C-V2V.
Background
With the rapid development of C-V2X (Cellular-Vehicle to evolution) and LTE-U (LTE in Ullicensed Spectrums) technologies, the convergence of C-V2X and LTE-U is a necessary trend for future communication development. But the initial WiFi and C-V2X networks were designed to operate in different frequency bands. With the rapid increase of vehicle users, the licensed spectrum resources are in tension, and considering that the services of V2X are mainly divided into two main categories: (1) the safety type service mainly comprises road condition information, accident information, safety early warning and the like; (2) the service type services mainly comprise weather information, map updating, vehicle entertainment and the like. Therefore, the service type traffic of V2X is unloaded to the unlicensed frequency band, and the pressure of licensed spectrum users can be effectively relieved. Deployment of C-V2X in unlicensed bands must take into account the differences in WiFi communication with C-V2X.
The 802.11 series protocols stipulate that the operating frequency bands of the Unlicensed Spectrum are 2.4GHz and 5GHz, the 2.4GHz band is already densely occupied by wireless technologies such as Bluetooth and WiFi, the interference is complex, the utilization rate of the 5GHz band is low, the available space is large, and the deployment of LTE-V (Long Term Evolution-Vehicle) in the 5GHz Unlicensed band to realize LTE-V-U (LTE-V Communications in the Unlicensed Spectrum) communication is an inevitable trend of future communication development. However, in practical deployment, since the 802.11 protocol has no clear channel selection specification, the channel selected by the WiFi AP is also relatively arbitrary. With the increase of the number of WiFi AP and WiFi terminals, the channel selection of an LTE-V-U user is more complicated than the situation above, and the channel reuse is inevitable, but the WiFi system does not have a regular cell shape and a planned coverage range like the LTE system, the installation position of the WiFi AP is random, the WiFi AP can be randomly placed according to the requirements of the user, and the used channel has randomness, so that the LTE-V-U user is more difficult to realize the channel reuse in an unauthorized frequency band than a cellular network.
Through research, although LTE-V-U users can ensure fairness of WiFi users accessing channels by using an lbt (listen Before talk) mechanism, for scenarios where LTE-V-U users are densely deployed such as commercial districts, each LTE-V-U user uses an lbt (listen Before talk) mechanism, once a plurality of users have communication requirements to perform cca (clear Channel access) detection on channels at the same time, collisions will occur, great interference will be generated between each user and backoff will be performed for a random time duration, so that the channels may be in a state of "being able to transmit data but unable to transmit data", so that probability of users accessing the channels is reduced, and system performance is damaged.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a resource allocation method and a resource allocation device for C-V2V vehicles, wherein a fleet is formed by compiling the C-V2V vehicles, so that the number of competitors positioned nearby on the same channel is effectively reduced, the collision probability is reduced, and the channel utilization rate is improved.
In order to achieve the purpose, the invention provides the following technical scheme:
in one aspect, the invention provides a resource allocation method for a C-V2V vehicle, comprising the following steps:
compiling the C-V2V vehicles to form a C-V2V vehicle fleet and determining the head vehicle of the C-V2V vehicle fleet;
enabling the head vehicles of the C-V2V motorcade to carry out channel access through an LBT mechanism, and after the channel access, carrying out resource allocation on the accessed head vehicles of the C-V2V motorcade by a base station;
after the head vehicle of the C-V2V motorcade receives the information of resource allocation sent by the base station, the head vehicle of the C-V2V motorcade transmits the information of resource allocation to the members of the C-V2V motorcade, so that the members can communicate in a channel accessed by the head vehicle of the C-V2V motorcade according to the information of resource allocation.
In another aspect, the present invention provides a resource allocation apparatus for a C-V2V vehicle, including:
the compiling unit is used for compiling the C-V2V vehicles to form a C-V2V vehicle fleet and determining the head vehicle of the C-V2V vehicle fleet;
the access unit is used for enabling the head vehicles of the C-V2V motorcade to carry out channel access through an LBT mechanism, and after the channel access, the base station carries out resource allocation on the accessed head vehicles of the C-V2V motorcade;
and the communication unit is used for enabling the head vehicle of the C-V2V vehicle fleet to transmit the information of the resource allocation to the members of the C-V2V vehicle fleet after the head vehicle of the C-V2V vehicle fleet receives the information of the resource allocation sent by the base station, so that the members can communicate in a channel accessed by the head vehicle of the C-V2V vehicle fleet according to the information of the resource allocation.
In another aspect, the present invention further provides an electronic device, including: a processor, a memory, a communication interface, and a communication bus; wherein the content of the first and second substances,
the processor, the communication interface and the memory complete mutual communication through a communication bus;
the processor is configured to invoke logic instructions in the memory to perform one of the above-described resource allocation methods for the C-V2V vehicle.
In another aspect, the present disclosure also provides a non-transitory computer readable storage medium storing computer instructions that cause the computer to perform a method of resource allocation for a C-V2V vehicle as described above.
The resource allocation method and the resource allocation device for the C-V2V vehicle form a C-V2V vehicle fleet and determine the head vehicle of the C-V2V vehicle fleet by compiling the C-V2V vehicle; enabling the head vehicles of the C-V2V motorcade to carry out channel access through an LBT mechanism, and after the channel access, carrying out resource allocation on the accessed head vehicles of the C-V2V motorcade by a base station; the number of competitors positioned adjacent on the same channel is effectively reduced, the collision probability is reduced, and the channel utilization rate is improved. The base station distributes resources for the fleet members, transmits resource distribution information to the head cars, and transmits the resource distribution information to the fleet members through the head cars, so that communication conflicts in the fleet are avoided, and the unauthorized spectrum utilization rate is improved. After the head vehicle of the C-V2V motorcade receives the information of resource allocation sent by the base station, the head vehicle of the C-V2V motorcade transmits the information of resource allocation to the members of the C-V2V motorcade, so that the members can communicate in a channel accessed by the head vehicle of the C-V2V motorcade according to the information of resource allocation. And adopting an LBT mechanism to carry out unauthorized channel access by taking the fleet as a unit. Therefore, the number of competitors accessed by the channel can be reduced, the collision probability is reduced, the user is prevented from being in a retreat state for a long time, and the successful transmission probability is greatly increased.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a resource allocation method for a C-V2V vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a communication flow of a head-up vehicle in an embodiment of the present invention;
FIG. 3 is a schematic illustration of a fleet member communication flow in an embodiment of the present invention;
FIG. 4 is a flow chart of fleet communication in an embodiment of the present invention;
FIG. 5 is a diagram illustrating a structure of a control frame according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a resource allocation apparatus of a C-V2V vehicle according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a resource allocation method for a C-V2V vehicle, and with reference to FIG. 1, the method specifically comprises the following steps:
s101: compiling the C-V2V vehicles to form a C-V2V vehicle fleet and determining the head vehicle of the C-V2V vehicle fleet;
in this step, the C-V2V vehicle sends the basic information to the base station through the LTE-V-U device, and the base station realizes acquiring the basic information of each C-V2V vehicle, where the basic information includes: ID of the C-V2V vehicle, travel distance information of the C-V2V vehicle, and position information of the C-V2V vehicle;
it should be noted that, the position information is acquired through GPS positioning, and meanwhile, a sensor capable of calculating speed and acceleration is installed on the vehicle, when the acceleration is lower than a fixed value a, the running distance S in this period of time starts to be counted, once the acceleration is greater than the fixed value a, the currently calculated running distance S is immediately saved, when the acceleration of the vehicle is again lower than the fixed value a, a new running distance S value is calculated again, and only when the current running distance S is greater than the historical maximum running distance S, the value of the running distance S is updated. The LTE-V-U sends the ID information, the driving distance information and the position information to the base station periodically. And the greater the travel distance S, the better the stability of the vehicle over a period of time.
The base station receives the uploaded basic information, divides the C-V2V vehicles into a plurality of areas according to the position information of the C-V2V vehicles, counts the evaluation index of each C-V2V vehicle in each area mainly to avoid the occurrence of a plurality of head vehicles in one area, and determines the head vehicles of the C-V2V fleet in each area according to the evaluation index; wherein the evaluation index is determined based on the travel distance information of the C-V2V vehicle and the evaluation index of the C-V2V vehicle.
Further, for the evaluation index of each vehicle, the evaluation index is empty at the initial time, sorting is performed only according to the travel distance S, and the ID corresponding to the maximum travel distance S is selected, and the vehicle corresponding to the ID is the selected head vehicle. After the head vehicle arrives at the destination, the members of the fleet can evaluate the three categories of the difference, the medium and the good, the evaluation index E is stored at the base station side, and the evaluation index E is reduced when the poor evaluation is carried out; for the middle evaluation, the evaluation index E is unchanged; for good evaluation, the evaluation index E is increased.
It should be noted that, in the subsequent process of selecting the head car, the base station obtains an evaluation index E corresponding to the ID and a driving distance S for evaluation, specifically, V ═ p × S + (1-p) E, where V is the evaluation index and parameter p is to keep the evaluation index E and the driving distance S at the same order of magnitude, then ranks the evaluation indexes V, selects the largest evaluation index V as the head car, and then the base station sends confirmation information to the head cars in different areas.
It should be noted that by forming a fleet of vehicles, traffic pressure can be reduced and traffic capacity can be increased; resource allocation is carried out in a motorcade mode, so that the collision probability can be reduced, and the channel utilization rate is improved. The way of selecting the head vehicle in the fleet is jointly completed through basic information and evaluation of the vehicle. When the election of the head vehicle is completed, other independent vehicle users can consider whether to join/leave the fleet according to the conditions of the users.
S102: enabling the head vehicles of the C-V2V motorcade to carry out channel access through an LBT mechanism, and after the channel access, carrying out resource allocation on the accessed head vehicles of the C-V2V motorcade by a base station;
in this step, referring to fig. 2, after the C-V2V fleet is formed, the C-V2V fleet periodically transmits basic information of the fleet to the base station, where the transmission frequency band is an authorized frequency band, and all head vehicles within the range of the base station use the same control channel for communicating with the base station, and the head vehicles also broadcast the basic information of the fleet to members of the fleet through D2D (Device-to-Device). Referring to fig. 3, a fleet member may also periodically send basic information to a front vehicle, and meanwhile, to ensure safe driving of the fleet, the fleet member also needs to send the basic information to a following rear vehicle, where it is noted that a channel used by the fleet member to send information to the rear vehicle is consistent with a channel used by the rear vehicle to send information to the front vehicle.
The basic information of the C-V2V motorcade consists of the basic information of a plurality of C-V2V vehicles in the C-V2V motorcade.
S103: after the head vehicle of the C-V2V motorcade receives the information of resource allocation sent by the base station, the head vehicle of the C-V2V motorcade transmits the information of resource allocation to the members of the C-V2V motorcade, so that the members can communicate in a channel accessed by the head vehicle of the C-V2V motorcade according to the information of resource allocation.
In this step, the head car of the C-V2V fleet performs channel contention access with the WiFi user by using an LBT mechanism on an unlicensed frequency band, and receives resource allocation information sent by the base station after the channel access. And the base station adopts an SPS (Semi-Persistent Scheduling) Scheduling mechanism to allocate resources to the head vehicles of the accessed C-V2V motorcade and sends information of the resource allocation to the head vehicles of the C-V2V motorcade.
Referring to fig. 4, since the fleet and WiFi users contend for access to the channel through LBT, the usage time after each contention to the channel must not exceed txop (transmission opportunity). To reduce the overhead of fleet resource allocation, a semi-persistent scheduling SPS scheme may be used; as can be seen from the above discussion, the channel time occupied by the user in the unlicensed frequency band each time is irregular, and in combination with the SPS scheduling, a dynamic SPS resource allocation scheme is proposed, and SPS resource allocation is triggered by whether to preempt a channel. The specific details are as follows: the head vehicle of each fleet occupies the unauthorized frequency channel on behalf of the fleet, and after the resources are occupied, the head vehicle sends a scheduling request to an eNB (base station), and the eNB allocates the resources according to the number of the resources required by the fleet members collected by the head vehicle. The SPS scheduling period is determined according to the time that the head vehicle occupies the unauthorized frequency band, namely, each SPS scheduling period is defined as the time that a channel is occupied once; the specific resource allocation scheme is that a head vehicle can periodically receive a control frame of a team member, the control frame contains resources required by the team member, after the head vehicle of a team competes for the resources, resource allocation can be performed according to the number of RBs required by the team member counted before, after the resource allocation is completed, the resource allocation cannot be performed again during the period of occupying the unauthorized frequency band communication, and the next resource allocation cannot be triggered until the head vehicle of the team competes for a channel again next time. If a plurality of fleets compete for the channel of the same unlicensed frequency band, the resource allocation scheme is determined according to whether the fleets compete for the resource, and once the fleets compete for the spectrum resource, the resource allocation inside the fleets is triggered.
It should be noted that the spectrum resources have a spatial multiplexing characteristic, and if the distance between the fleet and the fleet or the fleet and the AP of the WiFi is relatively far, the same channel can be multiplexed for transmission. Since all LTE-V users need to send control information, the control information is mainly described by a control frame, the control frame includes basic information and an indication of how much resource information is needed, and the structure of the control frame is shown in fig. 5. The control information of the fleet is transmitted in an authorized frequency band, the common service information is transmitted in an unauthorized frequency band, once the fleet is formed, fleet members can periodically send control frames to the head vehicle, after the fleet is formed and the channel is determined, the head vehicle represents the fleet and adopts an LBT mechanism to compete for current channel access, at the moment, the fleet members do not compete, and once an access opportunity is obtained, the head vehicle performs resource allocation according to the user requirements in the fleet. The purpose of this is to reduce the number of adjacent competitors on the current channel, reduce the probability of collision, and avoid inter-fleet interference.
In the above embodiment, since V2V communication is limited by distance, if the number of fleet members is not limited, communication quality will be sharply reduced, and at this time, communication can be achieved in a multi-hop manner, which increases delay; considering that the effective communication distance of the D2D is 50 meters and the distance between the vehicles is 5 meters, the number of the fleets is limited to 8, and the head vehicle broadcasts basic information periodically before 8 vehicles are reached; once 8 are reached, the head car will not broadcast information on the control channel.
After the locomotive is determined, the basic information of the locomotive is periodically broadcast on a control channel, and the independent vehicles on the road monitor the control channel information, so that the basic information of the locomotive of the motorcade is obtained, then the independent vehicles join the motorcade, the vehicles joining the motorcade receive the basic information of the locomotive, and simultaneously send the basic information of the independent vehicles to the first vehicle and the following vehicles.
When the team member arrives at the destination and prepares to leave the team, the vehicle and the following vehicle send own information, so that the leaving team only affects the following team member.
After the head vehicle arrives at the destination, the fleet member evaluates the next fleet service, the evaluation is measured according to the information that the vehicle body sensor records the stable running in the driving process of the fleet, then the fleet member transmits a control frame carrying the evaluation information to the head vehicle, the head vehicle counts and calculates the total service score and uploads the total service score to the base station, and the base station stores the evaluation record of the head vehicle. The motorcade is disassembled, and the motorcade member can determine whether to join in other motorcades according to the self condition.
As can be seen from the foregoing description, the resource allocation method for a C-V2V vehicle according to the embodiment of the present invention can relieve the pressure of a cellular network and improve the system performance by offloading part of service data to an unlicensed frequency band for transmission. Aiming at the characteristic of dense deployment of LTE-V-U, an LBT mechanism is adopted to carry out unauthorized channel access by taking a fleet as a unit. Therefore, the number of competitors accessed by the channel can be reduced, the collision probability is reduced, the channel utilization rate is improved, the user is prevented from being in a retreat state for a long time, and the successful transmission probability is greatly increased. After the head vehicle obtains the opportunity of accessing the channel, the resource allocation information is transmitted to the head vehicle and is transmitted to the motorcade member through the head vehicle, so that communication conflict in the motorcade is avoided, and the utilization rate of the unauthorized frequency spectrum is improved. The base station adopts a resource allocation scheme and a dynamic semi-static resource scheduling scheme, so that the signaling overhead can be greatly reduced.
An embodiment of the present invention provides a resource allocation apparatus for a C-V2V vehicle, and referring to fig. 6, the apparatus specifically includes:
the compiling unit 10 is used for compiling the C-V2V vehicles to form a C-V2V vehicle fleet and determining the head vehicles of the C-V2V vehicle fleet;
the access unit 20 is configured to enable a head vehicle of the C-V2V fleet to perform channel access through an LBT mechanism, and after the channel access, a base station performs resource allocation on the accessed head vehicle of the C-V2V fleet;
and the communication unit 30 is used for enabling the head vehicle of the C-V2V vehicle fleet to transmit the information of the resource allocation to the members of the C-V2V vehicle fleet after the head vehicle of the C-V2V vehicle fleet receives the information of the resource allocation sent by the base station, so that the members can communicate in a channel accessed by the head vehicle of the C-V2V vehicle fleet according to the information of the resource allocation.
The functions implemented by the modules in the apparatus correspond to the corresponding operation steps in the method embodiment, and are not described herein again.
According to the technical scheme, the resource allocation device of the C-V2V vehicle can relieve the pressure of a cellular network and improve the system performance by unloading part of service data to an unauthorized frequency band for transmission. Aiming at the characteristic of dense deployment of LTE-V-U, an LBT mechanism is adopted to carry out unauthorized channel access by taking a fleet as a unit. Therefore, the number of competitors accessed by the channel can be reduced, the collision probability is reduced, the channel utilization rate is improved, the user is prevented from being in a retreat state for a long time, and the successful transmission probability is greatly increased. After the head vehicle obtains the opportunity of accessing the channel, the resource allocation information is transmitted to the head vehicle and is transmitted to the motorcade member through the head vehicle, so that communication conflict in the motorcade is avoided, and the utilization rate of the unauthorized frequency spectrum is improved. The base station adopts a resource allocation scheme and a dynamic semi-static resource scheduling scheme, so that the signaling overhead can be greatly reduced.
An embodiment of the present invention provides an electronic device, and referring to fig. 7, the electronic device may include: a processor (processor)810, a communication Interface 820, a memory 830 and a communication bus 840, wherein the processor 810, the communication Interface 820 and the memory 830 communicate with each other via the communication bus 840. The processor 810 may call logic instructions in the memory 830 to perform the following method: compiling the C-V2V vehicles to form a C-V2V vehicle fleet and determining the head vehicle of the C-V2V vehicle fleet; enabling the head vehicles of the C-V2V motorcade to carry out channel access through an LBT mechanism, and after the channel access, carrying out resource allocation on the accessed head vehicles of the C-V2V motorcade by a base station; after the head vehicle of the C-V2V motorcade receives the information of resource allocation sent by the base station, the head vehicle of the C-V2V motorcade transmits the information of resource allocation to the members of the C-V2V motorcade, so that the members can communicate in a channel accessed by the head vehicle of the C-V2V motorcade according to the information of resource allocation.
In addition, the logic instructions in the memory 830 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
An embodiment of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the method provided by the above method embodiments, for example, the method includes: compiling the C-V2V vehicles to form a C-V2V vehicle fleet and determining the head vehicle of the C-V2V vehicle fleet; enabling the head vehicles of the C-V2V motorcade to carry out channel access through an LBT mechanism, and after the channel access, carrying out resource allocation on the accessed head vehicles of the C-V2V motorcade by a base station; after the head vehicle of the C-V2V motorcade receives the information of resource allocation sent by the base station, the head vehicle of the C-V2V motorcade transmits the information of resource allocation to the members of the C-V2V motorcade, so that the members can communicate in a channel accessed by the head vehicle of the C-V2V motorcade according to the information of resource allocation.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, apparatus, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus, and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means/systems for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. The terms "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention is not limited to any single aspect, nor is it limited to any single embodiment, nor is it limited to any combination and/or permutation of these aspects and/or embodiments. Moreover, each aspect and/or embodiment of the present invention may be utilized alone or in combination with one or more other aspects and/or embodiments thereof.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (6)
1. A resource allocation method for a C-V2V vehicle, comprising:
compiling the C-V2V vehicles to form a C-V2V vehicle fleet and determining the head vehicle of the C-V2V vehicle fleet;
enabling the head vehicles of the C-V2V motorcade to carry out channel access through an LBT mechanism, and after the channel access, carrying out resource allocation on the accessed head vehicles of the C-V2V motorcade by a base station;
after the head vehicle of the C-V2V motorcade receives the information of resource allocation sent by the base station, the head vehicle of the C-V2V motorcade transmits the information of resource allocation to the members of the C-V2V motorcade so that the members communicate in a channel accessed by the head vehicle of the C-V2V motorcade according to the information of resource allocation;
the method comprises the steps that basic information of a head vehicle is periodically broadcasted in a control channel by the head vehicle, so that independent vehicles on a road can monitor the basic information in the control channel and acquire the basic information of the head vehicle, and then the independent vehicles join a fleet of vehicles;
after the vehicle team is added, the basic information of the head vehicle is received, and the basic information of the head vehicle is sent to the head vehicle;
the step of compiling the C-V2V vehicles to form a C-V2V vehicle fleet and determining the head of the C-V2V vehicle fleet comprises the following steps:
acquiring basic information of each C-V2V vehicle, wherein the basic information comprises: travel distance information of the C-V2V vehicle and position information of the C-V2V vehicle;
dividing the C-V2V vehicle into a plurality of areas according to the position information of the C-V2V vehicle;
counting the evaluation index of each C-V2V vehicle in each area, and determining the head vehicle of the C-V2V vehicle fleet in each area according to the evaluation index; wherein the evaluation index is determined based on the travel distance information of the C-V2V vehicle and the evaluation index of the C-V2V vehicle;
determining the largest evaluation index in the evaluation indexes as the first vehicle; the determination mode of the evaluation index is as follows: v ═ p × S + (1-p) E;
wherein V is an evaluation index, E is an evaluation index, S is a driving distance, p is a parameter, and the parameter p is used for keeping the evaluation index E and the driving distance S in the same order of magnitude; after the head car of the C-V2V vehicle reaches the destination, the adult evaluates the service of the head car, and the head car uploads the service evaluation to the base station so that the base station end stores the evaluation record of the head car;
wherein, the base station side stores an evaluation index E, and the evaluation index E is reduced when the evaluation is poor; for the middle evaluation, the evaluation index E is unchanged; for good evaluation, the evaluation index E is increased.
2. The method for allocating resources of C-V2V vehicle according to claim 1, wherein after the C-V2V vehicle fleet is formed, the head vehicle of the C-V2V vehicle fleet transmits basic information of the C-V2V vehicle fleet to the base station in the authorized frequency band, and simultaneously broadcasts the basic information of the C-V2V vehicle fleet to the members of the C-V2V vehicle fleet by means of D2D; the basic information of the C-V2V motorcade consists of the basic information of a plurality of C-V2V vehicles in the C-V2V motorcade;
members of the C-V2V fleet respectively send basic information of the C-V2V fleet to following members and head vehicles through a D2D mode.
3. The method for allocating resources of C-V2V vehicle according to claim 1, wherein said step of making the head vehicle of said C-V2V vehicle fleet perform channel access through LBT mechanism, and after the channel access, performing resource allocation to the accessed head vehicle of said C-V2V vehicle fleet by a base station comprises:
and the head vehicle of the C-V2V motorcade performs channel competitive access with WiFi users by adopting an LBT mechanism on an unauthorized frequency band, and receives resource allocation information sent by a base station after the channel access.
4. The resource allocation method of a C-V2V vehicle according to claim 3,
and the base station adopts an SPS scheduling mechanism to allocate resources to the head vehicles of the accessed C-V2V motorcade and sends information of resource allocation to the head vehicles of the C-V2V motorcade.
5. An electronic device, comprising: a processor, a memory, a communication interface, and a communication bus; wherein the content of the first and second substances,
the processor, the communication interface and the memory complete mutual communication through a communication bus;
the processor is used for calling logic instructions in the memory to execute the resource allocation method of the C-V2V vehicle as claimed in any one of claims 1-4.
6. A non-transitory computer readable storage medium storing computer instructions for causing a computer to perform the method of resource allocation for a C-V2V vehicle of any one of claims 1-4.
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