CN111148071B - Data transmission method and vehicle-mounted terminal - Google Patents

Data transmission method and vehicle-mounted terminal Download PDF

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Publication number
CN111148071B
CN111148071B CN201911425116.9A CN201911425116A CN111148071B CN 111148071 B CN111148071 B CN 111148071B CN 201911425116 A CN201911425116 A CN 201911425116A CN 111148071 B CN111148071 B CN 111148071B
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vehicle
mounted terminal
cluster
information
weight value
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CN111148071A (en
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刘琪
邱佳慧
宋蒙
陈伟
冯毅
周光涛
赵荐雄
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China United Network Communications Group Co Ltd
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China United Network Communications Group Co Ltd
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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]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/32—Connectivity information management, e.g. connectivity discovery or connectivity update for defining a routing cluster membership
    • 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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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention provides a data transmission method and a vehicle-mounted terminal, relates to the technical field of communication, and solves the problem that network resources occupy a large amount in V2V communication in the prior art. When a first vehicle-mounted terminal determines to be a cluster head, clustering a second vehicle-mounted terminal in a coverage area to determine a first cluster; the cluster head is used for processing the shared information sent by the second vehicle-mounted terminal in the first cluster and sending the processed first information to the cluster head of the second cluster through the base station; the method comprises the steps that a first vehicle-mounted terminal receives sharing information sent by a second vehicle-mounted terminal in a first cluster; after the first vehicle-mounted terminal processes the shared information, the first information obtained through processing is sent to a cluster head of a second cluster through a base station; wherein the number of bytes of the first information is smaller than the number of bytes of the second information.

Description

Data transmission method and vehicle-mounted terminal
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a data transmission method and a vehicle terminal.
Background
With the continuous development of society, the popularity of automobiles is higher and higher, and driving and traveling bring certain negative effects to human society while bringing convenience to people, such as: the rapid increase in the number of vehicles causes a series of problems such as traffic jams, frequent traffic accidents, and the like. To avoid these problems, vehicles may acquire road condition information or receive information services in time through vehicle-to-vehicle (vehicle to vehicle, V2V) communication, such as: the vehicle can broadcast the V2V information such as the speed, the running direction, the specific position, whether the emergency brake is stepped on or not and the like of the white body to surrounding vehicles, so that drivers of the surrounding vehicles can better perceive traffic conditions outside the sight distance according to the acquired information, thereby pre-judging dangerous conditions in advance and taking corresponding avoidance measures, and further reducing the occurrence frequency of the problems.
Currently, in a long term evolution (long term evolution, LTE) communication network, when V2V communication is performed between vehicles as shown in fig. 1, in order to enable a far-end vehicle to timely acquire information of a front vehicle, the vehicles need to transmit information to be shared to other vehicles through a base station, and when the number of vehicles is large, because each vehicle needs to frequently transmit information to be shared to other vehicles through the base station, a large amount of network resources are occupied.
According to the scheme, the problem that network resources occupy a large amount in V2V communication in the prior art is solved.
Disclosure of Invention
The embodiment of the invention provides a data transmission method and a vehicle-mounted terminal, which solve the problem that network resources occupy a large amount in V2V communication in the prior art.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a data transmission method, including: when the first vehicle-mounted terminal determines to be a cluster head, clustering the second vehicle-mounted terminal in the coverage area, and determining a first cluster; the cluster head is used for processing the shared information sent by the second vehicle-mounted terminal in the first cluster and sending the processed first information to the cluster head of the second cluster through the base station; the method comprises the steps that a first vehicle-mounted terminal receives sharing information sent by a second vehicle-mounted terminal in a first cluster; after the first vehicle-mounted terminal processes the shared information, the first information obtained through processing is sent to a cluster head of a second cluster through a base station; wherein the number of bytes of the shared information is smaller than the number of bytes of the first information.
As can be seen from the above solution, in the data transmission method provided by the embodiment of the present invention, when the first vehicle-mounted terminal determines to be a cluster head, the second vehicle-mounted terminal in the coverage area is clustered, and the first cluster is determined; therefore, the first vehicle-mounted terminal receives the shared information sent by the second vehicle-mounted terminal in the first cluster, so that the shared information sent by the second vehicle-mounted terminal in the first cluster does not need to be directly transmitted to the base station, the shared information is processed through the first vehicle-mounted terminal, the processed first information is transmitted to the second cluster through the base station, only 1 vehicle-mounted terminal in each cluster is communicated with the base station, the occupation of the vehicle-mounted terminal to the network resources of the base station is greatly reduced, and the problem that the occupation of the network resources in V2V communication in the prior art is large is solved.
In a second aspect, an embodiment of the present invention provides a vehicle-mounted terminal, including: the processing unit is used for clustering the second vehicle-mounted terminal in the coverage area when determining to be a cluster head, and determining a first cluster; the cluster head is used for processing the shared information sent by the second vehicle-mounted terminal in the first cluster and sending the processed first information to the cluster head of the second cluster through the base station; the receiving and transmitting unit is used for receiving the sharing information sent by the second vehicle-mounted terminal in the first cluster; the processing unit is also used for controlling the receiving and transmitting unit to transmit the first information obtained by processing to the cluster head of the second cluster through the base station after processing the shared information received by the receiving and transmitting unit; wherein the number of bytes of the shared information is smaller than the number of bytes of the first information.
In a third aspect, an embodiment of the present invention provides a vehicle-mounted terminal, including: communication interface, processor, memory, bus; the memory is used for storing computer execution instructions, and the processor is connected with the memory through a bus, and when the vehicle-mounted terminal runs, the processor executes the computer execution instructions stored in the memory, so that the vehicle-mounted terminal executes the method provided in the first aspect.
In a fourth aspect, embodiments of the present invention provide a computer storage medium comprising instructions which, when run on a computer, cause the computer to perform the method as provided in the first aspect above.
It can be appreciated that any of the above-provided vehicle-mounted terminals is configured to perform the method corresponding to the first aspect provided above, and therefore, the advantages achieved by the method of the first aspect and the advantages of the corresponding scheme in the following detailed description are not repeated herein.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a prior art network architecture for V2V communication between vehicles;
fig. 2 is a network architecture diagram of a data transmission method according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a data transmission method according to an embodiment of the present invention;
FIG. 4 is a second flow chart of a data transmission method according to the embodiment of the invention;
fig. 5 is a schematic diagram of a network structure for V2V communication between vehicles according to a data transmission method according to an embodiment of the present invention;
FIG. 6 is a third flow chart of a data transmission method according to the embodiment of the invention;
FIG. 7 is a flowchart of a data transmission method according to an embodiment of the present invention;
FIG. 8 is a flowchart of a data transmission method according to an embodiment of the present invention;
FIG. 9 is a flowchart illustrating a data transmission method according to an embodiment of the present invention;
FIG. 10 is a flow chart of a data transmission method according to an embodiment of the invention;
FIG. 11 is a flowchart illustrating a data transmission method according to an embodiment of the present invention;
fig. 12 is a flowchart illustrating a data transmission method according to an embodiment of the present invention;
FIG. 13 is a schematic diagram of a data transmission method according to an embodiment of the present application;
fig. 14 is a schematic structural diagram of a vehicle-mounted terminal according to an embodiment of the present application;
fig. 15 is a second schematic structural diagram of a vehicle-mounted terminal according to an embodiment of the present application;
fig. 16 is a third schematic structural diagram of a vehicle-mounted terminal according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described below with reference to the accompanying drawings.
In order to clearly describe the technical solution of the embodiments of the present application, in the embodiments of the present application, the terms "first", "second", etc. are used to distinguish the same item or similar items having substantially the same function and effect, and those skilled in the art will understand that the terms "first", "second", etc. are not limited in number and execution order.
Furthermore, references to the terms "comprising" and "having" and any variations thereof in the description of the present application are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed but may optionally include other steps or elements not listed or inherent to such process, method, article, or apparatus.
In embodiments of the application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
In the description of the embodiments of the present application, unless otherwise indicated, the meaning of "a plurality" means two or more. For example, a plurality of networks refers to two or more networks.
The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. The symbol "/" herein indicates that the associated object is or is a relationship, e.g., A/B indicates A or B.
The following explains the technology related to the present application for the convenience of the reader to understand:
in an embodiment of the present application, the base station may be a global system for mobile communications (globalsystem for mobil ecommunication, GSM), a base station (basetransceiver station, BTS) in code division multiple access (code division multiple access, CDMA), a base station (node B, NB) in wideband code division multiple access (wideband code division multiple access, WCDMA), a base station (evolvedNode B, eNB) in long term evolution (Long Term Evolution, LTE), an eNB in the internet of things (internet of things, ioT) or narrowband internet of things (narrow band-internetof things, NB-IoT), a base station in a future 5G mobile communication network or a future evolved public land mobile network (public land mobile network, PLMN), which is not limited in this embodiment of the present application.
With the widespread use of mobile internet, internet of things (internet of things, ioT) and wireless sensing technologies, internet of vehicles has become one of the key approaches to realize future smart transportation and smart cities. However, due to the high mobility of the vehicle, the internet of vehicles has special network structure characteristics: firstly, the topology of the vehicle nodes in the network may change rapidly due to mobility of the vehicle, so that the communication links between the nodes are difficult to maintain for a long time, and the life cycle is greatly reduced. In addition, rapid movement of the vehicle may cause severe fading of the channel, and trees, buildings, etc. at the roadside may generate severe shadow fading, further deteriorating the channel quality. On resource scheduling, the long term evolution (long term evolution, LTE) -vehicular wireless communication technology (V2X) has two resource scheduling modes, namely a base station scheduling mode and a mode-4, namely a base station scheduling mode or an autonomous selection mode. The mode-4 of autonomous resource selection based on a resource pool has become a main stream mode of resource allocation in V2V communication, and although the method reduces the time delay of communication to a certain extent and meets the transmission requirement of security application messages, as the number of vehicles increases in an explosive manner, vehicle nodes on a road are more and more, and the phenomenon of resource starvation is serious.
The data transmission method provided by the embodiment of the invention is applied to the network architecture diagram shown in fig. 2; in the third generation partnership project (3rd generation partnership project,3GPP) TR23.785, among others, architecture assumptions for potential LTE support V2X services are defined, including architectures based on the LTE-Uu interface and the PC5 interface; the architectures based on the two interfaces can independently support the UE to send and receive information; the reference model of the V2X architecture based on the PC5 and LTE-Uu interfaces is shown in fig. 2, where the relevant new functions and part of interfaces are defined as follows:
V2X Control Function: this logic function is used for the response of the network required by V2X.
V1: V2X applies to the reference points between V2X servers.
V2: a reference point between a V2X application server and V2X control functions within an operator network, wherein the V2X application server may be connected to V2X control functions within a plurality of PLMN networks.
V3: the reference point between the V2X-capable User Equipment (UE) and the V2X control function in the operator network needs to be established on the basis of service authorization and PC3 configuration, and can be applied to V2X based on PC5 and V2X based on Uu port.
V4: reference point between home subscriber server (home subscriber server, HSS) HSS and V2X control functions within the operator network.
V5: reference points between V2X applications.
LTE-Uu: reference point between V2X capable UE and UMTS evolved terrestrial radio access network (Evolution UMTS Terrestrial Radio Access Network, E-u tran).
PC5: V2X capable UE supports V2V, V I and V2P service reference points.
In order to solve the above problem, when a first vehicle-mounted terminal is determined to be a cluster head, clustering a second vehicle-mounted terminal in a coverage area to determine a first cluster; therefore, the first vehicle-mounted terminal receives the shared information sent by the second vehicle-mounted terminal in the first cluster, so that the shared information sent by the second vehicle-mounted terminal in the first cluster does not need to be directly transmitted to the base station, the shared information is processed through the first vehicle-mounted terminal, the processed first information is transmitted to the second cluster through the base station, only 1 vehicle-mounted terminal in each cluster is communicated with the base station, the occupation of the vehicle-mounted terminal to the network resources of the base station is greatly reduced, and the problem that the occupation of the network resources in V2V communication in the prior art is large is solved.
It should be noted that, in practical application, the vehicle-mounted terminal is disposed on a vehicle, and the data transmission method provided by the embodiment of the invention is implemented as the vehicle-mounted terminal, and in the embodiment of the invention, when the vehicle is mentioned, the vehicle-mounted terminal disposed on the vehicle is represented; for simplicity of calculation, 1 in-vehicle terminal is mounted to each vehicle for illustration; specifically, the location information may be represented by global positioning system (global positioning system, GPS) coordinates or by geodetic coordinates, and the location information is described herein by taking the geodetic coordinates as an example, and the specific implementation procedure is as follows:
Example 1
An embodiment of the present invention provides a data transmission method, as shown in fig. 3, including:
s11, when the first vehicle-mounted terminal is determined to be a cluster head, clustering is carried out on the second vehicle-mounted terminal in the coverage area, and the first cluster is determined. The cluster head is used for processing the shared information sent by the second vehicle-mounted terminal in the first cluster, and sending the processed first information to the cluster head of the second cluster through the base station.
Optionally, the first vehicle terminal determines to be a cluster head, as shown in fig. 4 including:
s110, the first vehicle-mounted terminal acquires the position information of the second vehicle-mounted terminal in the coverage area and receives the signal receiving power of the position information.
It should be noted that, in practical application, when the embodiment of the present invention provides a data transmission method in the process of running of a vehicle equipped with the vehicle-mounted terminal provided in the embodiment of the present invention, as shown in fig. 5, the coverage area of the base station 1 is 1-1, and the coverage area of the vehicle a is a-1; and when the vehicle a determines that the cluster head carries out clustering, obtaining that the coverage area of the first cluster is a-2.
Since the vehicles (such as the vehicle a and the vehicle d) running in opposite directions and the vehicles (such as the vehicle a and the vehicle b) running in the same direction exist in the coverage area a-1, collision accidents are rarely caused by the existence of the isolation belt in the running process of the vehicles running in opposite directions; therefore, only vehicles traveling in the same direction are considered here, i.e., only the position information of the vehicle-mounted terminal traveling relatively in the coverage area a-1 and the signal reception power at which the position information is received are acquired here.
The procedure for determining vehicles traveling in the same direction in the coverage area as shown in fig. 5 is exemplified as follows:
determining the moving direction included angle between the vehicle a and any vehicle (such as the vehicle b, the vehicle c, the vehicle d and the vehicle e) in the coverage range according to the moving direction included angle calculation formula and the position information; wherein, the calculation formula of the moving direction included angle is:
wherein θ represents the angle between the vehicle a and the moving direction of any vehicle (such as the vehicle b) in the coverage area, and x a Ground longitude, y representing vehicle a a Indicating the geodetic latitude, z of the vehicle a a Indicating the ground height of the vehicle a, x b Geodetic longitude, y representing any vehicle in coverage (e.g., vehicle b) b Indicating the earth latitude, z of any vehicle (e.g. vehicle b) within the coverage area b Indicating the ground height of any vehicle (e.g., vehicle b) within the coverage area.
And when the included angle between the moving directions of the vehicle a and the vehicle b is smaller than the designated angle, determining that the driving directions of the vehicle a and the vehicle b are consistent.
When the included angle between the moving directions of the vehicle a and the vehicle d is larger than or equal to the specified angle, the running directions of the vehicle a and the vehicle d are different.
Specifically, the designated angle can be set according to the actual situation, for example, the designated angle is 45 °.
S111, the first vehicle-mounted terminal determines a first weight value of the first vehicle-mounted terminal according to the position information and the signal receiving power.
And S112, determining to be a cluster head when the first weight value and the second weight value of the second vehicle-mounted terminal meet the preset condition, clustering the second vehicle-mounted terminal in the coverage range, and determining the first cluster.
Optionally, the determining, by the first vehicle-mounted terminal, a first weight value according to the location information and the signal receiving power, includes, as shown in fig. 6:
s1110, the first vehicle-mounted terminal determines a received power ratio according to the signal received power.
Determining a power ratio according to a power ratio calculation formula and signal receiving power corresponding to position information transmitted by the same vehicle (such as the vehicle b) which is continuously received for N times; wherein, the power ratio calculation formula includes:
wherein M (a, b) represents the power ratio of the vehicle a to the vehicle b in the coverage area, b.fwdarw.a represents the signal receiving power of the vehicle a when the vehicle b transmits the position information to the vehicle a,indicating the signal receiving power corresponding to the position information transmitted by the nth received vehicle b, +.>Bit indicating that vehicle b was received N-1And the signal receiving power corresponding to the information is set.
Specifically, when N vehicles exist in the coverage area, determining a receiving power ratio according to a receiving power ratio calculation formula and the power ratio of the vehicle a to each vehicle in the coverage area; wherein, the receiving power ratio calculation formula includes:
Wherein M (a) represents the received power ratio of the vehicle a to N vehicles in the coverage area,mean value of power ratio of vehicle a and each vehicle in coverage, M (a, N) means the received power ratio of vehicle a to the nth vehicle in coverage, N and N are integers and N E [1, N]。
S1111, the first vehicle-mounted terminal determines the relative distance according to the position information.
Specifically, determining the relative distance according to the position information includes:
determining a driving distance according to a distance calculation formula, the position information of the vehicle a and the position information of the vehicle b in the coverage area; wherein, the distance calculation formula includes:
wherein d (a, b) represents the travel distance between the vehicle a and the vehicle b, and x a Ground longitude, y representing vehicle a a Indicating the geodetic latitude, z of the vehicle a a Indicating the ground height of the vehicle a, x b Represents the geodetic longitude, y of the vehicle b b Indicating the geodetic latitude, z of the vehicle b b Indicating the ground height of vehicle b.
Specifically, when N vehicles exist in the coverage area, determining the relative distance according to the relative distance calculation formula and the running distance between the vehicle a and each vehicle b in the coverage area: wherein, the relative distance calculation formula includes:
wherein, the liquid crystal display device comprises a liquid crystal display device,representing the relative distance between the vehicle a and N vehicles in the coverage area, N and N are integers and N is E [1, N ]。
S1112, the first vehicle-mounted terminal determines a first weight value of the first vehicle-mounted terminal according to the received power ratio and the relative distance.
Specifically, determining a first weight value according to the received power ratio and the relative distance includes:
first, in constructing the decision matrix W, it is necessary to perform consistency check on the decision matrix W due to complexity and high subjectivity of the system. The consistency ratio formula is as follows:
wherein RI is a random consistency index, the value is shown in Table 1, CI is a consistency index to be calculated, and the calculation formula is:
wherein lambda is max N represents the matrix order of the decision matrix W, which is the largest eigenvalue of the matrix.
Specifically, when n is 2, the decision matrix W itself has consistency without checking, when n is greater than 2, when CR is less than 0.1, it indicates that the decision matrix W meets the consistency requirement, otherwise, the decision matrix needs to be readjusted until the consistency requirement is met.
Table 1 RI random consistency index
Matrix order 1 2 3 4 5 6 7 8 9 10
RI 0 0 0.52 0.90 1.12 1.24 1.32 1.41 1.45 1.49
It should be noted that, because the present invention only involves 2 factors, namely the received power ratio and the relative distance, that is, the matrix order of the decision matrix W to be constructed is 2, the decision matrix W itself has consistency; thus, no consistency check is required.
Second, a decision matrix is based on the received power ratio and the relative distance.
It is to be noted that, assuming that there are p factors, these are: a, a 1 、……、a p The rule for constructing the decision matrix is as follows:
1. if a is ij Representing the ratio of the importance of factors i and jIndicating the importance of factor j compared to factor i.
2. a, a ij ＞0。
3. a, a ij ＝1。
For example, assuming that the current scene where the vehicle a is located is an urban road, if the factor i is a received power ratio and the factor j is a relative distance, determining the decision matrix W as follows according to the above rule and table 2:
table 2 basis for determining importance of consideration
Dimension of Current scene Important isDegree
1 Dense urban area Consideration of factors i and j is as important
3 Urban area The former is slightly important compared to considerations i and j
5 Suburban area The former is significantly important in comparison with factors i and j
7 Rural area The former is important in consideration of factors i and j as compared with
9 Highway Taking into account the factors i and j, the former is extremely important
Specifically, the current scene where the vehicle a is located can be determined by matching the position information of the vehicle a with the map information.
Secondly, multiplying each row of elements in the constructed decision matrix W and calculating p times square roots of the elements to obtain W i The method comprises the steps of carrying out a first treatment on the surface of the Wherein, the liquid crystal display device comprises a liquid crystal display device,
here, p is equal to the order of the decision matrix W.
According to W i Determining the weight m of each factor i The method comprises the steps of carrying out a first treatment on the surface of the Wherein, the liquid crystal display device comprises a liquid crystal display device,
exemplary, when the decision matrixWhen the weight of factor i is determined to be 0.75, and the weight of factor j is determined to be 0.25.
Finally, according to the weight m of each factor i Determining a first weight value M according to the received power ratio and the relative distance; wherein, the liquid crystal display device comprises a liquid crystal display device,
optionally, the data transmission method as shown in fig. 7 and fig. 8 further includes:
s113, the first vehicle-mounted terminal determines that the first weight value and the second weight value do not meet preset conditions, and when invitation information sent by one second vehicle-mounted terminal is received in a designated time, feedback information is sent to the second vehicle-mounted terminal.
Or alternatively, the process may be performed,
s114, when the first vehicle-mounted terminal determines that the first weight value and the second weight value do not meet the preset condition and receives invitation information sent by a plurality of second vehicle-mounted terminals within a specified time, according to the position information of each second vehicle-mounted terminal in the plurality of second vehicle-mounted terminals, determining the relative distance between the first vehicle-mounted terminal and each second vehicle-mounted terminal, and the relative distance meeting the sending condition, and sending feedback information to the second vehicle-mounted terminal corresponding to the relative distance. The invitation information is used for indicating the second vehicle-mounted terminal to become a cluster member of the first cluster, and the feedback information is used for indicating the second vehicle-mounted terminal to become a cluster member of the first cluster.
It should be noted that, the cluster members are used to send the shared information to the cluster head, and not to other vehicles through the base station.
In practical applications, when it is determined that the first weight value does not meet the preset condition, it indicates that the vehicle a cannot become a cluster head. Thus, the vehicle a may become a member of other clusters, and specifically, the cluster to which the vehicle a belongs may be determined according to S113 and S114.
Specifically, determining, according to the position information of each second vehicle-mounted terminal in the plurality of second vehicle-mounted terminals, a relative distance between the first vehicle-mounted terminal and each second vehicle-mounted terminal, and sending feedback information to the second vehicle-mounted terminal corresponding to the relative distance satisfying the sending condition, including:
the relative distance of the vehicle a to each of the in-vehicle terminals that transmitted the invitation information is determined (in a manner of calculation such as S1111).
And determining the minimum relative distance between the vehicle a and each vehicle-mounted terminal sending the invitation information, and sending feedback information to the vehicle-mounted terminal corresponding to the minimum relative distance.
The minimum relative distance among the relative distances between the vehicle a and each of the vehicle-mounted terminals that transmit the invitation information is because the smaller the relative distance between the vehicles is, the higher the quality of signal transmission is, so that it can be ensured that the vehicle a can receive the first information of the other clusters in the shortest time.
Specifically, in practical application, when there are a plurality of minimum relative distances between the vehicle a and each vehicle-mounted terminal sending the invitation information, the vehicle-mounted terminal that receives the invitation information first may be selected as a cluster head according to the sequence of receiving the invitation information, and feedback information is sent to the cluster head.
Optionally, when the first vehicle-mounted terminal determines to be a cluster head, clustering is performed on the second vehicle-mounted terminal in the coverage area, and determining the first cluster includes, as shown in fig. 9:
and S115, when the first vehicle-mounted terminal determines to be a cluster head, sending invitation information to a second vehicle-mounted terminal in the coverage range. The invitation information is used for indicating the second vehicle-mounted terminal to become a cluster member of the first cluster.
In practical application, when it is determined that the first weight value of the vehicle a meets a preset condition, it indicates that the vehicle a has shared information as a cluster head (the cluster head is used for managing shared information sent by each vehicle (also referred to as a cluster member) in a cluster, and after the shared information is processed, the first information obtained by processing is sent to a second cluster through a base station.
Specifically, the smaller the first weight value, the more stable the overall motion state of the vehicle a and other vehicles in the coverage area.
Specifically, the feedback information may be hello packets.
In practical applications, the communication performance is affected by the too large and too small of the first cluster, so that each cluster includes 2 vehicles at a minimum and 15 vehicles at a maximum. Messages transmitted between vehicles are generally divided into periodic messages and bursty messages; wherein, the size of the data packet of the periodic message is 50-300bytes, and the size of the data packet of the burst message is 1200bytes. Based on this, when the base station configures the resource pool, the base station changes the resources of the resource pool into resource sets with different sizes, wherein the minimum is 100 Resource Blocks (RBs), and the maximum is 300 RBs. The cluster head can select a resource set with corresponding size according to the number of the cluster members, so that the waste of resources is reduced. The frequency band of the resource pool of the LTE-V2X D2D mode in the 3GPP standard is 5905-5925MHz, which is the frequency resource with 20M bandwidth. When configuring the resource pool, some field descriptions are preconfigured, for example: numsubbhannel (number of subchannels), subbhannel (size of subchannels), and the like. The size of a resource set and a corresponding number of specifications may be incremented in the null field to indicate the partitioning of the resource set for this resource pool.
S116, the first vehicle-mounted terminal receives feedback information sent by the second vehicle-mounted terminal, and classifies the second vehicle-mounted terminal sending the feedback information into the first cluster. The feedback information is used for indicating the second vehicle-mounted terminal to become a cluster member of the first cluster.
S12, the first vehicle-mounted terminal receives the sharing information sent by the second vehicle-mounted terminal in the first cluster.
When it is determined that the vehicle a is a cluster head, the vehicle a clusters the vehicles within the coverage area, and then the clustered vehicles belonging to the vehicle a transmit the shared information to the vehicle a through V2V communication.
S13, after the first vehicle-mounted terminal processes the shared information, the base station sends the first information obtained through processing to the cluster heads of the second clusters. Wherein the number of bytes of the shared information is smaller than the number of bytes of the first information.
In practical application, a communication module is arranged in the vehicle-mounted terminal, and when the vehicle-mounted terminal communicates with the base station, connection can be established between the vehicle-mounted terminal and the base station through the communication module; for example, the vehicle-mounted terminal may be provided with a subscriber identity module (Subscriber Identification Module, SIM) and access the base station through the SIM card, thereby facilitating management of the base station.
It should be noted that, as shown in fig. 5, when the first weight value of the vehicle a determines that the preset condition is met, cluster head information needs to be reported to the base station 1 that provides service currently, so that the base station 1 updates the stored cluster head list as shown in table 2; when receiving the first information sent by the vehicle a, the base station 1 sends the first information to each cluster head except the vehicle a in the cluster head list; wherein each cluster head corresponds to one cluster.
As shown in fig. 5, when the first weight value of the vehicle a no longer satisfies the preset condition during the movement, the cluster head revocation information needs to be reported to the base station 1 that is currently providing service, so that the base station 1 needs to update the stored cluster head list as shown in table 3; when receiving the first information transmitted by the vehicle e, the base station does not transmit the first information to the vehicle a any more, but the base station 1 transmits the first information to each cluster head except the vehicle e in the cluster head list.
Or alternatively, the process may be performed,
as shown in fig. 5, when the currently serving base station 1 determines that the vehicle a exits its coverage area over time, the base station 1 needs to update the stored cluster head list as shown in table 3; when receiving the first information transmitted by the vehicle e, the base station 1 no longer transmits the first information to the vehicle a, but the base station 1 transmits the first information to each cluster head except the vehicle e in the cluster head list.
Table 2 Cluster head list
Cluster head information Vehicle terminal identification code
Vehicle a XXXXXX
Vehicle e XXXXXX
Table 3 Cluster head list
Cluster head information Vehicle terminal identification code
Vehicle e XXXXXX
It should be noted that, when the vehicle a exits the coverage area of the base station 1, if the first weight value of the vehicle a still meets the preset condition, the vehicle a needs to report the cluster head information to the base station that currently provides the server, so as to facilitate the base station that currently provides the server to update the cluster head list; wherein, each vehicle corresponds to a vehicle-mounted terminal equipment code, and the vehicle-mounted terminal identification code can be an product code of the vehicle-mounted terminal, and each product code corresponds to a vehicle-mounted terminal; alternatively, the in-vehicle terminal identification code is an international mobile equipment identification code (International Mobile Equipment Identity, IMEI) of the SIM card mounted on the in-vehicle terminal.
Specifically, as shown in fig. 5, the vehicle a, the vehicle b, the vehicle c, the vehicle d, the vehicle e, the vehicle f, the vehicle g, and the vehicle h are all within the coverage of the base station 1; the coverage area of the vehicle a comprises a vehicle b, a vehicle c, a vehicle d and a vehicle e; wherein the traveling directions of the vehicle a and the vehicle d are opposite, and the traveling directions of the vehicle a and the vehicle b, the vehicle c and the vehicle d are the same; according to the data transmission method provided by the embodiment of the invention, the first weight value of the vehicle a can be determined to meet the preset condition, and meanwhile, the first weight values of the vehicle a, the vehicle b and the vehicle c all meet the preset condition in the coverage area of the vehicle a, so that the vehicle a, the vehicle b and the vehicle c can be determined to jointly form a first cluster. The vehicle a is a cluster head of a first cluster, after the shared information of the vehicle b and the vehicle c is required to be processed by the vehicle a, the obtained first information is sent to the vehicle f in a second cluster through a base station, and when the vehicle f receives the first information, the first information is sent to the vehicle g, so that the vehicles in the second cluster can timely know the running state of the vehicles in the first cluster; similarly, the vehicles f and g form a second cluster together, the vehicles f are cluster heads of the second cluster, after the vehicles g send the shared information to the vehicles f, the vehicles f process the shared information, and then the processed first information is sent to the vehicles a in the first cluster through the base station. Specifically, when there are multiple second clusters, the transmission of the first information is the above process, which is not described herein.
Specifically, when the vehicle-mounted terminal sends information, the idle time-frequency resources are needed to be perceived at first when the vehicle-mounted terminal autonomously selects the resources, and then the idle time-frequency resources are selected randomly, so that when vehicles are dense, resource selection conflict is easy to generate.
Optionally, the first information includes at least one of text information and character information; after the shared information is processed, the base station sends the first information obtained by processing to the cluster head of the second cluster, as shown in fig. 10, including:
s130, after the first vehicle-mounted terminal performs duplication removal processing on the text information and/or the character information, the first information obtained through processing is sent to a cluster head of the second cluster through the base station.
Optionally, the shared information includes numerical information; after the shared information is processed, the base station sends the first information obtained by processing to the cluster head of the second cluster, as shown in fig. 11, including:
s131, after the first vehicle-mounted terminal processes the digital information according to the T-S fuzzy model, the first information obtained through processing is sent to the cluster heads of the second clusters through the base station. Wherein the T-S fuzzy model comprises:
u 1 +u 2 +.....+u m-1 +u m ＝1；
Wherein y represents first information, x i Indicating the numerical information transmitted by the ith second vehicle-mounted terminal, u i The weight value of the numerical information sent by the ith second vehicle-mounted terminal is represented, m represents the total number of the second vehicle-mounted terminals in the first cluster, a represents the membership function center, b represents the membership function width, m and i are integers greater than 0 and i epsilon [1, m]。
Specifically, when a cluster member transmits a message to a cluster head, and the cluster head forwards the message among the clusters, the cluster head performs simple data fusion firstly because the received message of each cluster member in the clusters is repeated, and the two situations can be classified according to the content of data packet transmission: a data packet for transmitting characters, a data packet for transmitting characters and a data packet for transmitting numerical values. 1. When the transmitted data packets are words and/or characters, vehicles in the same cluster can cause the same content of the data packets transmitted by a plurality of vehicles due to similar geographic environments, and only one data packet is transmitted at the moment. 2. If the content of the transmitted data packet is numerical, a large amount of similar data needs to be removed because of the large similarity of the data packets transmitted by the vehicles in the same cluster, and the same type of data only remains one data and is forwarded, and at the moment, the data to be forwarded is calculated by adopting a T-S model fusion.
Specifically, processing shared information according to the Takagi-Sugeno (T-S) fuzzy model includes:
(1) If a cluster has m nodes, there are:
y＝f(x 1 ,x 2 ,......,x m )。
(2) The contribution of each data is represented by a weighting coefficient:
y＝u 1 ×x 1 +.....+u m ×x m ；
u 1+ u 2 +.....+u m-1 +u m ＝1。
(3) The weighting coefficient is obtained by adopting a normal membership function:
(4) The fused data is:
optionally, the data transmission method as shown in fig. 12 and fig. 13 further includes:
s14, the first vehicle-mounted terminal receives second information sent by the cluster head of the second cluster through the base station, and transmits the second information to the second vehicle-mounted terminal in the first cluster.
Specifically, the clustering method of the second cluster is the same as the clustering method of the first cluster, and will not be described here again.
It should be noted that, the vehicle a is used as a cluster head of the first cluster, and not only needs to process shared information sent by the vehicle-mounted terminals of the vehicles in the first cluster, but also sends the processed first information to the second cluster through the base station; the second information sent by the second cluster is received through the base station and is transmitted to each vehicle-mounted terminal in the first cluster, so that the vehicles running in the same direction can know the running state of the front vehicle, and accidents are avoided timely according to the running state of the front vehicle.
As shown in fig. 5, an exemplary embodiment of the present invention is that, a vehicle f and a vehicle g together form a second cluster, the vehicle f is a cluster head of the second cluster, after the vehicle g sends the shared information to the vehicle f, the vehicle f processes the shared information, and then sends the first information obtained by the processing to a vehicle a in the first cluster through a base station, and when the vehicle a receives the first information, the vehicle a needs to send the first information to a vehicle b and a vehicle c, so that the vehicle in the first cluster can timely know the running state of the vehicle in the second cluster.
When it is determined that the vehicle a is a cluster head, the vehicle a clusters the vehicles within the coverage area, and then, the vehicle a transmits the first information of the second cluster acquired from the base station to the clustered vehicles belonging to the vehicle a by means of V2V communication.
As can be seen from the above solution, in the data transmission method provided by the embodiment of the present invention, when the first vehicle-mounted terminal determines to be a cluster head, the second vehicle-mounted terminal in the coverage area is clustered, and the first cluster is determined; therefore, the first vehicle-mounted terminal receives the shared information sent by the second vehicle-mounted terminal in the first cluster, so that the shared information sent by the second vehicle-mounted terminal in the first cluster does not need to be directly transmitted to the base station, the shared information is processed through the first vehicle-mounted terminal, the processed first information is transmitted to the second cluster through the base station, only 1 vehicle-mounted terminal in each cluster is communicated with the base station, the occupation of the vehicle-mounted terminal to the network resources of the base station is greatly reduced, and the problem that the occupation of the network resources in V2V communication in the prior art is large is solved.
Example two
An embodiment of the present invention provides a vehicle-mounted terminal 10, as shown in fig. 14, including:
and the processing unit 102 is configured to determine, when the cluster head is determined, cluster the second vehicle-mounted terminal in the coverage area, and determine the first cluster. The cluster head is used for processing the shared information sent by the second vehicle-mounted terminal in the first cluster, and sending the processed first information to the cluster head of the second cluster through the base station.
And the transceiver 101 is configured to receive the shared information sent by the second vehicle-mounted terminal in the first cluster.
The processing unit 102 is further configured to control, after processing the shared information received by the transceiver unit 101, the transceiver unit 101 to send the first information obtained by the processing to the cluster head of the second cluster through the base station. Wherein the number of bytes of the shared information is smaller than the number of bytes of the first information.
Optionally, the transceiver unit 101 is specifically configured to obtain location information of the second vehicle terminal in the coverage area and signal receiving power for receiving the location information.
The processing unit 102 is specifically configured to determine a first weight value of the first vehicle-mounted terminal according to the location information acquired by the transceiver unit 101 and the signal receiving power acquired by the transceiver unit 101.
The processing unit 102 is specifically configured to determine that the cluster head is determined when the first weight value and the second weight value of the second vehicle-mounted terminal satisfy a preset condition.
Optionally, the processing unit 102 is specifically configured to determine the received power ratio according to the received power of the signal acquired by the transceiver unit 101.
The processing unit 102 is specifically configured to determine the relative distance according to the position information acquired by the transceiver unit 101.
The processing unit 102 is specifically configured to determine a first weight value of the first vehicle terminal according to the received power ratio and the relative distance.
Optionally, the processing unit 102 is further configured to determine that the first weight value and the second weight value do not meet a preset condition, and when the transceiver unit 101 receives the invitation information sent by the second vehicle-mounted terminal within a specified time, control the transceiver unit 101 to send feedback information to the second vehicle-mounted terminal.
Or alternatively, the process may be performed,
the processing unit 102 is further configured to determine, when the first weight value and the second weight value do not satisfy the preset condition and the receiving/transmitting unit 101 receives the invitation information sent by the plurality of second vehicle-mounted terminals within the specified time, determine, according to the position information of each second vehicle-mounted terminal in the plurality of second vehicle-mounted terminals, a relative distance between the first vehicle-mounted terminal and each second vehicle-mounted terminal, and a relative distance satisfying the sending condition, and control the receiving/transmitting unit 101 to send feedback information to the second vehicle-mounted terminal corresponding to the relative distance. The invitation information is used for indicating the second vehicle-mounted terminal to become a cluster member of the first cluster, and the feedback information is used for indicating the second vehicle-mounted terminal to become a cluster member of the first cluster.
Optionally, the processing unit 102 is specifically configured to control the transceiver unit 101 to send the invitation information to the second vehicle-mounted terminal in the coverage area when determining to be the cluster head. The invitation information is used for indicating the second vehicle-mounted terminal to become a cluster member of the first cluster.
The processing unit 102 is specifically configured to classify the second vehicle-mounted terminal that sends the feedback information into the first cluster according to the feedback information sent by the second vehicle-mounted terminal and received by the transceiver unit 101. The feedback information is used for indicating the second vehicle-mounted terminal to become a cluster member of the first cluster.
Optionally, the first information includes at least one of text information and character information; the processing unit 102 is specifically configured to send, through the base station, the first information obtained by processing to the cluster head of the second cluster after performing deduplication processing on the text information obtained by the transceiver unit 101 and/or the character information obtained by the transceiver unit 101.
Optionally, the shared information includes numerical information; the processing unit 102 is specifically configured to process the numerical information acquired by the transceiver unit 101 according to the T-S fuzzy model by the first vehicle terminal, and then send, through the base station, the processed first information to the cluster head of the second cluster. Wherein the T-S fuzzy model comprises:
u 1 +u 2 +.....+u m-1 +u m ＝1；
Wherein y represents first information, x i Indicating the numerical information transmitted by the ith second vehicle-mounted terminal, u i The weight value of the numerical information sent by the ith second vehicle-mounted terminal is represented, m represents the total number of the second vehicle-mounted terminals in the first cluster, a represents the membership function center, b represents the membership function width, m and i are integers greater than 0 and i epsilon [1, m]。
Optionally, the transceiver unit 101 is further configured to receive, by the base station, the second information sent by the cluster head of the second cluster, and transmit the second information to the second in-vehicle terminal in the first cluster.
Specifically, as shown in fig. 15, the vehicle-mounted terminal includes a processor, a radio frequency circuit, and a baseband circuit; the radio frequency circuit and the baseband circuit are coupled with the central processing unit; wherein the radio frequency circuit comprises an antenna. In addition, the vehicle-mounted terminal also comprises a SIM card, a storage device (such as a random access memory (English full name: random Access Memory; RAM) and a display screen, etc.) which are connected with the processor. The receiving and transmitting unit in the vehicle-mounted terminal provided by the embodiment of the invention comprises a radio frequency circuit and a baseband circuit, wherein the radio frequency circuit is used for transmitting the shared information processed by the baseband circuit to the base station through an antenna, receiving first information transmitted from the base station through the antenna and transmitting the first information to the baseband circuit; the baseband circuit is used for processing the shared information generated by the processor and then sending the processed shared information to the baseband circuit, and meanwhile, the baseband circuit is also used for processing the first information acquired by the radio frequency circuit and sending the first information to the processor; the processing unit in the vehicle-mounted terminal provided by the embodiment of the invention comprises a processor, wherein the processor is used for executing S11 and S13; in addition, the display screen is used for displaying the processing result of the processor.
All relevant contents of each step related to the above method embodiment may be cited to the functional descriptions of the corresponding functional modules, and their effects are not described herein.
In the case of employing an integrated module, the in-vehicle terminal 10 includes: the device comprises a storage unit, a processing unit and a transmitting and receiving unit. The processing unit is used for controlling and managing the actions of the vehicle-mounted terminal, for example, the receiving and transmitting unit is used for supporting the vehicle-mounted terminal to execute the process S12 of FIG. 3, and the processing unit is used for supporting the vehicle-mounted terminal to execute the processes S11 and S13 of FIG. 3; the receiving and transmitting unit is used for supporting information interaction between the vehicle-mounted terminal and other equipment. And the storage unit is used for storing the program codes and data of the vehicle-mounted terminal.
The processing unit is taken as a processor, the storage unit is a memory, and the receiving and transmitting unit is taken as a communication interface as an example. The in-vehicle terminal includes a communication interface 501, a processor 502, a memory 503, and a bus 504, and the communication interface 501 and the processor 502 are connected to the memory 503 through the bus 504, as shown in fig. 16.
The processor 502 may be a general purpose central processing unit (CPU, english full name: central Processing Unit), a microprocessor, an Application-specific integrated circuit (ASIC, english full name: application-Specific Integrated Circuit), or one or more integrated circuits for controlling program execution in accordance with aspects of the present application.
The Memory 503 may be, but is not limited to, a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a random access Memory (RandomAccess Memory, RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), a Read-Only optical disk (Compact Disc Read-Only Memory, CD-ROM) or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be stand alone and coupled to the processor via a bus. The memory may also be integrated with the processor.
Wherein the memory 503 is used for storing application codes for executing the inventive arrangements and is controlled by the processor 502 for execution. The communication interface 501 is used for information interaction with other devices, such as a remote control. The processor 502 is configured to execute application code stored in the memory 503 to implement the methods described in the embodiments of the present application.
Further, there is provided a computer-readable storage medium (or media) including instructions that, when executed, perform the method operations performed by the vehicle-mounted terminal in the above-described embodiments. In addition, a computer program product is provided, comprising the above computing storage medium (or media).
It should be understood that, in various embodiments of the present invention, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, indirect coupling or communication connection of devices or units, electrical, mechanical, or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory), a magnetic disk or an optical disk, etc., which can store program codes.
It can be appreciated that any of the above-provided vehicle-mounted terminals is configured to execute the method corresponding to the first embodiment provided above, so that the beneficial effects achieved by the method according to the first embodiment and the beneficial effects of the corresponding scheme in the following detailed description are not repeated herein.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (9)

1. A data transmission method, comprising:
when the first vehicle-mounted terminal determines to be a cluster head, clustering the second vehicle-mounted terminal in the coverage area, and determining a first cluster; the cluster head is used for processing shared information sent by a second vehicle-mounted terminal in the first cluster, and sending the first information obtained by processing to the cluster head of the second cluster through the base station;
the first vehicle-mounted terminal receives sharing information sent by a second vehicle-mounted terminal in the first cluster;
after the first vehicle-mounted terminal processes the shared information, the first information obtained through processing is sent to a cluster head of a second cluster through a base station; wherein the number of bytes of the shared information is smaller than the number of bytes of the first information; the first vehicle-mounted terminal determining to be a cluster head includes:
The first vehicle-mounted terminal obtains the position information of a second vehicle-mounted terminal in a coverage area and receives the signal receiving power of the position information;
the first vehicle-mounted terminal determines a first weight value of the first vehicle-mounted terminal according to the position information and the signal receiving power;
the first vehicle-mounted terminal determines to be a cluster head when the first weight value and the second weight value of the second vehicle-mounted terminal meet a preset condition;
the first vehicle-mounted terminal determines a first weight value according to the position information and the signal receiving power, and the first weight value comprises:
the first vehicle-mounted terminal determines a received power ratio according to the signal received power, and comprises the following steps: determining the power ratio according to a power ratio calculation formula and signal receiving power corresponding to position information sent by the same vehicle and received continuously for N times; wherein, the power ratio calculation formula includes:
wherein M (a, b) represents the power ratio of vehicle a to vehicle b in coverage, b→a represents the signal receiving power of vehicle a when vehicle b transmits position information to vehicle a, the followingRepresenting the signal receiving power corresponding to the N-th reception of the position information transmitted by the vehicle b, said +. >Representing the signal receiving power corresponding to the N-1 th time of receiving the position information sent by the vehicle b;
the first vehicle-mounted terminal determines a relative distance according to the position information;
the first vehicle-mounted terminal constructs a decision matrix of the received power ratio and the relative distance;
the first vehicle-mounted terminal is matched with map information according to the position information of the vehicle a, and a current scene where the vehicle a is located is determined, wherein the current scene comprises any one of the following: dense urban areas, suburban areas, rural areas and highways;
the first vehicle-mounted terminal determines a weight value of the receiving power ratio and a weight value of the relative distance according to the importance degree of the current scene and the decision matrix;
the first vehicle-mounted terminal determines a first weight value of the first vehicle-mounted terminal according to the weight value of the receiving power ratio, the weight value of the relative distance, the receiving power ratio and the relative distance;
wherein the first weight value of the first vehicle-mounted terminalWherein θ represents an angle between the moving directions of the vehicle a and the vehicle b; the m is 1 A weight value representing the relative distance, the Representing the relative distance; the m is 2 A weight value representing said received power ratio, said +.>Representing the received power ratio.
2. The data transmission method according to claim 1, characterized in that the data transmission method further comprises:
the first vehicle-mounted terminal determines that the first weight value and the second weight value do not meet the preset condition, and when receiving invitation information sent by one second vehicle-mounted terminal in a designated time, the first vehicle-mounted terminal sends feedback information to the second vehicle-mounted terminal;
or alternatively, the process may be performed,
the first vehicle-mounted terminal determines that the first weight value and the second weight value do not meet the preset condition, and when invitation information sent by a plurality of second vehicle-mounted terminals is received in a specified time, the relative distance between the first vehicle-mounted terminal and each second vehicle-mounted terminal and the relative distance meeting the sending condition are determined according to the position information of each second vehicle-mounted terminal in the plurality of second vehicle-mounted terminals, and feedback information is sent to the second vehicle-mounted terminal corresponding to the relative distance meeting the sending condition; the invitation information is used for indicating the second vehicle-mounted terminal to become a cluster member of a first cluster, and the feedback information is used for indicating the second vehicle-mounted terminal to become a cluster member of the first cluster.
3. The method for transmitting data according to claim 1, wherein when the first vehicle-mounted terminal determines to be a cluster head, clustering the second vehicle-mounted terminal in the coverage area, determining the first cluster, includes:
when the first vehicle-mounted terminal determines to be a cluster head, sending invitation information to a second vehicle-mounted terminal in a coverage range; the invitation information is used for indicating the second vehicle-mounted terminal to become a cluster member of a first cluster;
the first vehicle-mounted terminal receives feedback information sent by the second vehicle-mounted terminal, and classifies the second vehicle-mounted terminal sending the feedback information into a first cluster; the feedback information is used for indicating the second vehicle-mounted terminal to become a cluster member of the first cluster.
4. The data transmission method according to claim 1, wherein the first information includes at least one of text information and character information;
after the shared information is processed, the first information obtained by processing is sent to a cluster head of a second cluster through a base station, and the method comprises the following steps:
and after the first vehicle-mounted terminal performs de-duplication processing on the text information and/or the character information, the first information obtained by processing is sent to a cluster head of a second cluster through a base station.
5. The data transmission method according to any one of claims 1 to 4, wherein the shared information includes numerical information;
after the shared information is processed, the first information obtained by processing is sent to a cluster head of a second cluster through a base station, and the method comprises the following steps:
after the first vehicle-mounted terminal processes the numerical information according to the T-S fuzzy model, the first information obtained through processing is sent to a cluster head of a second cluster through a base station; wherein the T-S fuzzy model comprises:
u 1 +u 2 +.....+u m-1 +u m ＝1；
wherein y represents first information, x i Indicating the numerical information transmitted by the ith second vehicle-mounted terminal, u i The weight value of the numerical information sent by the ith second vehicle-mounted terminal is represented, m represents the total number of the second vehicle-mounted terminals in the first cluster, a represents a membership function center, b represents a membership function width, m and i are integers greater than 0 and i epsilon [1, m]。
6. The data transmission method according to any one of claims 1 to 4, characterized in that the data transmission method further comprises:
and the first vehicle-mounted terminal receives second information sent by the cluster head of the second cluster through the base station and transmits the second information to the second vehicle-mounted terminal in the first cluster.
7. A vehicle-mounted terminal, characterized by comprising:
the processing unit is used for clustering the second vehicle-mounted terminal in the coverage area when determining to be a cluster head, and determining a first cluster; the cluster head is used for processing shared information sent by a second vehicle-mounted terminal in the first cluster, and sending the first information obtained by processing to the cluster head of the second cluster through the base station; the receiving and transmitting unit is used for receiving the sharing information sent by the second vehicle-mounted terminal in the first cluster;
the processing unit is further used for controlling the receiving and transmitting unit to send the first information obtained by processing to the cluster heads of the second clusters through the base station after processing the shared information received by the receiving and transmitting unit; wherein the number of bytes of the shared information is smaller than the number of bytes of the first information; the receiving and transmitting unit is further configured to obtain location information of a second vehicle-mounted terminal in the coverage area and signal receiving power for receiving the location information;
the processing unit is further used for determining a first weight value of the first vehicle-mounted terminal according to the position information acquired by the receiving and transmitting unit and the signal receiving power acquired by the receiving and transmitting unit; determining that the first weight value and the second weight value of the second vehicle-mounted terminal form a cluster head when the first weight value and the second weight value of the second vehicle-mounted terminal meet preset conditions;
The processing unit is further configured to determine a received power ratio according to the signal received power, and includes: determining the power ratio according to a power ratio calculation formula and signal receiving power corresponding to position information sent by the same vehicle and received continuously for N times; wherein, the power ratio calculation formula includes:
wherein M (a, b) represents the power ratio of vehicle a to vehicle b in coverage, b→a represents the signal receiving power of vehicle a when vehicle b transmits position information to vehicle a, the followingRepresenting the signal receiving power corresponding to the N-th reception of the position information transmitted by the vehicle b, said +.>Representing the signal receiving power corresponding to the N-1 th time of receiving the position information sent by the vehicle b;
the processing unit is further used for determining a relative distance according to the position information; constructing a decision matrix of the received power ratio and the relative distance; according to the matching of the position information of the vehicle a and the map information, determining a current scene of the vehicle a, wherein the current scene comprises any one of the following steps: dense urban areas, suburban areas, rural areas and highways; determining a weight value of the receiving power ratio and a weight value of the relative distance according to the importance degree of the current scene and the decision matrix;
The processing unit is further configured to determine a first weight value of the first vehicle terminal according to the weight value of the received power ratio, the weight value of the relative distance, the received power ratio, and the relative distance;
wherein the first weight value of the first vehicle-mounted terminalWherein θ represents an angle between the moving directions of the vehicle a and the vehicle b; the m is 1 A weight value representing the relative distance, theRepresenting the relative distance; the m is 2 A weight value representing said received power ratio, said +.>Representing the received power ratio.
8. A computer storage medium having instructions stored thereon which, when run on a computer, cause the computer to perform the data transmission method according to any of the preceding claims 1-6.
9. A vehicle-mounted terminal, characterized by comprising: communication interface, processor, memory, bus; the memory is used for storing computer-executable instructions, and the processor is connected with the memory through a bus, when the vehicle-mounted terminal runs, the processor executes the computer-executable instructions stored in the memory, so that the vehicle-mounted terminal executes the data transmission method as claimed in any one of claims 1-6.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108012244A (en) * 2017-11-29 2018-05-08 南京工业大学 Highway vehicular ad hoc network data services communication system and method based on cluster
CN108882329A (en) * 2018-07-27 2018-11-23 中国联合网络通信集团有限公司 A kind of cluster-dividing method and device
CN109769225A (en) * 2019-03-05 2019-05-17 维沃移动通信有限公司 A kind of vehicle is to vehicle V2V communication means, the network equipment and terminal

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3042524B1 (en) * 2013-09-06 2018-12-26 Telefonaktiebolaget LM Ericsson (publ) Cluster-based resource allocation for vehicle-to-vehicle communication
WO2016201594A1 (en) * 2015-06-15 2016-12-22 海能达通信股份有限公司 Method, terminal and system for cluster terminal to feed back downlink channel information

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108012244A (en) * 2017-11-29 2018-05-08 南京工业大学 Highway vehicular ad hoc network data services communication system and method based on cluster
CN108882329A (en) * 2018-07-27 2018-11-23 中国联合网络通信集团有限公司 A kind of cluster-dividing method and device
CN109769225A (en) * 2019-03-05 2019-05-17 维沃移动通信有限公司 A kind of vehicle is to vehicle V2V communication means, the network equipment and terminal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
异构网络下基于车辆权值的分簇算法;郭爱煌等;《同济大学学报(自然科学版)》;20180514(第04期);全文 *

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