CN110324389B - Data transmission method and device based on Internet of vehicles and computer readable storage medium - Google Patents
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- CN110324389B CN110324389B CN201810292887.4A CN201810292887A CN110324389B CN 110324389 B CN110324389 B CN 110324389B CN 201810292887 A CN201810292887 A CN 201810292887A CN 110324389 B CN110324389 B CN 110324389B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 111
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000000872 buffer Substances 0.000 claims description 11
- 238000012546 transfer Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 4
- 238000004590 computer program Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 3
- 235000008694 Humulus lupulus Nutrition 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
- H04L67/63—Routing a service request depending on the request content or context
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
- H04W28/14—Flow control between communication endpoints using intermediate storage
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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]
- H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
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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]
- H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
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- Medical Informatics (AREA)
- Information Transfer Between Computers (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The disclosure relates to a data transmission method, device and computer readable storage medium based on the internet of vehicles, and relates to the technical field of data processing. The method is executed through nodes in the Internet of vehicles, and the Internet of vehicles is constructed based on CCN. The method comprises the following steps: receiving data requests from other nodes; counting the request times of different data; determining data with the request times reaching or exceeding a threshold value as data to be cached; and sending a notice for caching the data to be cached to at least some other nodes in a data transmission link, wherein the data transmission link is used for transmitting a data request corresponding to the data to be cached. According to the technical scheme, the data transmission efficiency can be improved so as to adapt to the Internet of vehicles system with rapid network topology change.
Description
Technical Field
The disclosure relates to the technical field of data processing, and in particular relates to a data transmission method based on the internet of vehicles, a data transmission device based on the internet of vehicles and a computer readable storage medium.
Background
With the continuous development of intelligent traffic, the internet of vehicles technology has gradually penetrated in people's daily life. The mobile shopping of the vehicle is used as an important application of the internet of vehicles technology, and the user can conveniently acquire service information of markets, supermarkets, restaurants and the like in the vehicle, so that shopping operation is performed.
Due to characteristics of high-speed mobility of vehicles in the internet of vehicles, rapid change of a network topology structure and the like, how to perform high-efficiency data transmission between vehicles is an important problem to be solved by the internet of vehicles technology. The related art adopts a "user-host-user" network structure centered on a host for data transmission, i.e., all users need to establish a connection with the host.
Disclosure of Invention
The inventors of the present disclosure found that the above-described related art has the following problems: when a user transmits data, the user needs to establish connection with a host computer, so that the data transmission delay is large, the data transmission efficiency is low, and the method is not suitable for the Internet of vehicles system with rapid network topology change. Aiming at least one of the problems, the disclosure provides a data processing technical scheme based on the Internet of vehicles, which has high data transmission efficiency, and can be applied to an Internet of vehicles system with rapid network topology change.
According to some embodiments of the present disclosure, there is provided a data transmission method based on the internet of vehicles, which is implemented by a node in the internet of vehicles, the internet of vehicles being constructed based on CCN (Content Centric Network content center network), the data transmission method comprising: receiving data requests from other nodes; counting the request times of different data; determining the data of which the request times reach or exceed a threshold value as data to be cached; and sending a notice for caching the data to be cached to at least some other nodes in a data transmission link, wherein the data transmission link is used for transmitting a data request corresponding to the data to be cached.
Optionally, sending a data request to other nodes, where in a case where all other nodes in the data transmission range of the node do not cache data corresponding to the data request, sending, by a forwarding node, the data request to other nodes outside the data transmission range, where the forwarding node is located at an edge of the data transmission range.
Optionally, in the case that the node is located within the coverage area of a roadside unit, sending a data request to the roadside unit; and sending data requests to other nodes under the condition that the nodes are located outside the coverage range of the road side unit.
Optionally, when the node enters the coverage area of the road side unit, the data request is sent to the road side unit under the condition that all other nodes in the data transmission range of the node do not buffer the data corresponding to the data request.
According to further embodiments of the present disclosure, there is provided a data transmission apparatus based on the internet of vehicles, the internet of vehicles being constructed based on CCN, the data transmission apparatus comprising: a receiver for receiving data requests from other nodes; the processor is used for counting the request times of different data and determining the data of which the request times reach or exceed a threshold value as the data to be cached; and the transmitter is used for transmitting a notification for caching the data to be cached to at least part of other nodes in a data transmission link, and the data transmission link is used for transmitting a data request corresponding to the data to be cached.
Optionally, the transmitter is further configured to send a data request to other nodes, where, in a case where all other nodes within the data transmission range of the node do not cache data corresponding to the data request, the data request is sent to other nodes outside the data transmission range by a forwarding node, where the forwarding node is another node located at an edge of the data transmission range.
Optionally, the transmitter sends a data request to the roadside unit if the node is located within the coverage area of the roadside unit, and sends a data request to other nodes if the node is located outside the coverage area of the roadside unit.
Optionally, the transmitter sends the data request to the road side unit when the node enters the coverage area of the road side unit under the condition that all other nodes in the data transmission range of the node do not buffer the data corresponding to the data request.
According to still further embodiments of the present disclosure, there is provided a data transmission apparatus based on internet of vehicles, including: the receiving module is used for receiving data requests from other nodes; the statistics module is used for counting the request times of different data; the determining module is used for determining the data of which the request times reach or exceed a threshold value as data to be cached; and the sending module is used for sending a notice of caching the data to be cached to at least some other nodes in a data transmission link, and the data transmission link is used for transmitting a data request corresponding to the data to be cached.
According to still further embodiments of the present disclosure, there is provided a data transmission apparatus based on the internet of vehicles, including: a memory and a processor coupled to the memory, the processor configured to perform one or more steps of the internet of vehicles-based data transfer method of any of the embodiments described above based on instructions stored in the memory device.
According to still further embodiments of the present disclosure, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements one or more steps of the internet of vehicles-based data transmission method of any of the above embodiments.
In the embodiment, the internet of vehicles is constructed based on the CCN, and the data to be cached is determined according to the request times of the data, so that each node in the internet of vehicles can cache the data with larger current demand in advance, thereby improving the data transmission efficiency to adapt to the internet of vehicles system with rapid network topology change.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The disclosure may be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 illustrates a schematic diagram of some embodiments of a CCN-based established Internet of vehicles of the present disclosure;
FIG. 2 illustrates a flow chart of some embodiments of a data transmission method based on Internet of vehicles of the present disclosure;
FIG. 3 illustrates a schematic diagram of some embodiments of the Internet of vehicles connection of the present disclosure;
FIG. 4 illustrates a flow chart of further embodiments of the data transmission method of the present disclosure based on Internet of vehicles;
FIG. 5 illustrates a schematic diagram of some embodiments of a data request forwarding method of the present disclosure;
FIG. 6 illustrates a block diagram of some embodiments of a data transmission device based on the Internet of vehicles of the present disclosure;
FIG. 7 illustrates a block diagram of further embodiments of the data transmission device of the present disclosure based on the Internet of vehicles;
fig. 8 illustrates a block diagram of still further embodiments of the internet of vehicles-based data transfer device of the present disclosure.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless it is specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
The inventors of the present disclosure have recognized that nodes in the internet of vehicles are equipped with a communication module and a cache module, and may self-organize to form a vehicle communication network. Therefore, the "host-host" network structure of the CCN has better adaptability in vehicle communication than the "user-host-user" network structure employed in the related art. Through CCN, nodes (i.e., vehicles) can directly communicate with each other, and nodes can also communicate with a base station or a Road Side Unit (RSU). Thus, the user does not need to establish connection with the host computer when transmitting data, thereby improving the data transmission efficiency.
In addition, nodes in the internet of vehicles established based on the CCN may act as servers to store various data, providing data sharing services for other vehicles. Therefore, the good data caching strategy can save network resources and accelerate data transmission.
The above technical idea can be concretely implemented by the following embodiments.
Fig. 1 shows a schematic diagram of some embodiments of CCN-based networking of vehicles of the present disclosure.
As shown in fig. 1, infrastructure (roadside unit a, roadside unit b) around supermarkets and malls can communicate with each vehicle around them, such as broadcasting commodity information and the like. Each vehicle may also send a required commodity information request packet to the roadside unit a and the roadside unit b to obtain the content of interest. The vehicles can also be directly communicated with each other to realize content sharing. Two data packet types exist in a data transmission link of the Internet of vehicles established based on the CCN, a data request data packet and a content return data packet, wherein the content return data packet comprises data content corresponding to the data request.
The inventors of the present disclosure have recognized that the user's need for merchandise information may vary. For example, during a meal time, the user may be relatively in vigorous demand for dining information, while at other times, the market may be more interested in flowing discount information for apparel. Therefore, the data with stronger current demand is cached in the storage units of the vehicle and the road side unit, so that the data transmission efficiency can be effectively improved, and the transmission time delay and the energy consumption can be reduced. For example, in some embodiments, data transmission in the internet of vehicles may be achieved through the steps in fig. 2.
Fig. 2 illustrates a flow chart of some embodiments of a data transmission method based on internet of vehicles of the present disclosure.
As shown in fig. 2, the method includes: step 210, receiving a data request, step 220, and counting the number of requests; step 230, determining data to be cached; step 240, notifying other nodes to buffer data.
In step 210, in a CCN-based constructed internet of vehicles, data requests from other nodes are received by nodes in the internet of vehicles.
In step 220, the number of requests for different data is counted. In some embodiments, the node connection manner in the internet of vehicles may be as shown in fig. 3.
Fig. 3 illustrates a schematic diagram of some embodiments of the internet of vehicles connection of the present disclosure.
As shown in FIG. 3, the Internet of vehicles comprises nodes 31-36, the node 31 is directly connected with nodes 32-34, and the node 31 is connected with nodes 35 and 36 through the node 34.
In some embodiments, node 31 receives data requests for first data sent by nodes 32, 33, 34, and 36, and node 31 also receives data requests for second data sent by node 35. In this case, the node 31 may count the number of requests for the first data to 4 times and the number of requests for the second data to 1 time. The number of requests for different data is counted and further processing may continue through steps 230 and 240 in fig. 2.
In step 230, data for which the number of requests reaches or exceeds a threshold is determined as data to be buffered.
In some embodiments, a data demand meter may be established in a controller of a node and/or a roadside unit of the internet of vehicles, for recording the number of requests for each data. For example, the content name corresponding to the data and the number of requests for the data may be recorded in the data demand level table in the form of key-value pairs.
In some embodiments, the threshold may be set according to the current network load situation, the user requirement, and other factors, and the data of which the number of requests reaches or exceeds the threshold is determined as the data to be cached. The data to be cached means that the data is the content with more vigorous current demands. For example, the threshold may be set to 3 times, and according to the above embodiment, the number of requests of the first data is 4 times, and if the threshold is exceeded, the first data may be determined to be data to be cached.
In step 240, at least some other nodes in the data transmission link are notified to buffer the data to be buffered, and a data request corresponding to the data to be buffered is transmitted over the data transmission link. In the embodiment of fig. 3, nodes 32, 33, 34 and 36 are all in a requested data transmission link for the first data (e.g., node 36 sends a data request for the first data to node 31 via node 34, etc.). In this case, the node 31 may notify the node 32, the node 33, the node 34 and the node 36 to buffer the first data, or notify some of the nodes 32, the node 33, the node 34 and the node 36 to buffer the first data, which may be specifically determined according to the actual requirement or the current network load degree.
In the above embodiment, the internet of vehicles is constructed based on the CCN, and the data to be cached is determined according to the number of requests of the data, so that each node in the internet of vehicles can cache the data with larger current demand in advance, thereby improving the data transmission efficiency to adapt to the internet of vehicles system with rapid network topology change.
Fig. 4 shows a flowchart of further embodiments of the internet of vehicles based data transmission method of the present disclosure.
As shown in fig. 4, in step 410, a node in the internet of vehicles may obtain a data request from a user, where the data request includes content of interest to the user.
In step 420, the node determines whether it has cached data corresponding to the data request. If so, step 430 is performed. Otherwise, step 440 is performed.
In step 430, the corresponding data is provided to the user.
In step 440, the node determines whether it is within the coverage of the roadside unit. If so, step 450 is performed. Otherwise, step 460 is performed.
In step 450, a data request is sent to a roadside unit. Thus, data can be preferentially acquired from the road side units, and the data transmission burden between the nodes is reduced.
In step 460, the node sends a data request to other nodes within its data transmission range.
In step 470, it is determined whether the other nodes have corresponding data cached. If so, step 480 is performed. Otherwise, step 490 may be performed, or step 440 may be performed after the node enters the coverage area of the roadside unit.
In step 480, corresponding data is acquired. In some embodiments, step 480 may also be performed after step 450, and step 430 may be performed after the corresponding data is obtained.
In step 490, the forwarding node sends the data request to other nodes outside the data transmission range, which forwarding node is located at the edge of the data transmission range.
In some embodiments, if all other nodes within the transmission range of the node do not cache corresponding data, the data request may be sent to other nodes outside the transmission range of the data by a forwarding node, which is another node located at the edge of the transmission range of the data. For example, the data request may be forwarded by way of example in fig. 5.
Fig. 5 illustrates a schematic diagram of some embodiments of a data request forwarding method of the present disclosure.
As shown in fig. 5, the data transmission range radius of the node 51 is R, and the arc represents a data transmission range line. It can be seen that node 51 has node 52 and node 53 within the data transmission range, node 53 being located at the edge of the data transmission range. Node 54 is located outside the data transmission range of node 51, but within the data transmission range of node 53. For example, node 51 issues a data request to node 52 and node 53, but neither node 52 nor node 53 buffers the corresponding data, in which case node 51 may forward the data request to node 54 with node 53 (the node at the edge of the data transmission range of node 51) as a forwarding node.
In this way, node 51 does not have to forward the data request through node 52 to node 53 and then to node 54. Namely, the data transmission link 3 hops to 2 hops, so that the forwarding quantity of the data packet is reduced, and the data redundancy is reduced.
In some embodiments, steps 470-490 in fig. 4 may also be performed after step 420 and before step 440. That is, in the case where the other nodes do not cache the corresponding data, the data request is directly forwarded to the other nodes outside the data transmission range through the forwarding node, without having to send the data request to the roadside unit.
In the above embodiment, the internet of vehicles is constructed based on CCN, on one hand, the data transmission burden between the nodes can be reduced by acquiring the data through the road side unit; on the other hand, forwarding data requests through nodes at the edges of the data transmission range may reduce data redundancy. Therefore, the data transmission efficiency can be improved to adapt to the Internet of vehicles system with rapid network topology change.
Fig. 6 illustrates a block diagram of some embodiments of a data transmission device based on the internet of vehicles of the present disclosure.
As shown in fig. 6, the internet of vehicles-based data transmission device 6 includes a receiver 61, a processor 62, and a transmitter 63, and the internet of vehicles is constructed based on CCN.
The receiver 61 receives data requests from other nodes. The processor 62 counts the number of requests for different data and determines data for which the number of requests meets or exceeds a threshold as data to be buffered. The transmitter 63 informs at least some other nodes in the data transmission link of the buffering of the data to be buffered, and the data request corresponding to the data to be buffered is transmitted through the data transmission link.
In some embodiments, the transmitter 63 may also transmit data requests to other nodes. For example, in the case where all other nodes within the data transmission range of the node do not buffer data corresponding to the data request, the transmitter 63 transmits the data request to other nodes outside the data transmission range through a forwarding node, which is another node located at the edge of the data transmission range.
In some embodiments, the transmitter 63 transmits a data request to a roadside unit in case the node is located within the coverage area of the roadside unit. In case the node is located outside the coverage of the roadside unit, the transmitter 63 transmits a data request to other nodes.
In some embodiments, the transmitter 63 transmits a data request to a roadside unit when a node enters the coverage of the roadside unit in the case where all other nodes within the data transmission range of the node do not buffer data corresponding to the data request.
In the embodiment, the internet of vehicles is constructed based on the CCN, and the data to be cached is determined according to the request times of the data, so that each node in the internet of vehicles can cache the data with larger current demand in advance, thereby improving the data transmission efficiency to adapt to the internet of vehicles system with rapid network topology change.
Fig. 7 illustrates a block diagram of further embodiments of the internet of vehicles-based data transfer device of the present disclosure.
As shown in fig. 7, the data transmission device 7 based on the internet of vehicles includes a receiving module 71, a statistics module 72, a determination module 73, and a transmitting module 74, and the internet of vehicles is constructed based on CCN.
The receiving module 71 receives data requests from other nodes. The statistics module 72 counts the number of requests for different data, and the determination module 73 determines data whose number of requests reaches or exceeds a threshold value as data to be cached. The sending module 74 notifies at least some other nodes in the data transmission link to buffer the data to be buffered, and the data request corresponding to the data to be buffered is transmitted through the data transmission link.
In the embodiment, the internet of vehicles is constructed based on the CCN, and the data to be cached is determined according to the request times of the data, so that each node in the internet of vehicles can cache the data with larger current demand in advance, thereby improving the data transmission efficiency to adapt to the internet of vehicles system with rapid network topology change.
Fig. 8 illustrates a block diagram of still further embodiments of the internet of vehicles-based data transfer device of the present disclosure.
As shown in fig. 8, the article information processing apparatus 8 of this embodiment includes: a memory 81 and a processor 82 coupled to the memory 81, the processor 82 being configured to perform the internet of vehicles-based data transfer method in any of the embodiments of the present disclosure based on instructions stored in the memory 81.
The memory 81 may include, for example, a system memory, a fixed nonvolatile storage medium, and the like. The system memory stores, for example, an operating system, application programs, boot Loader (Boot Loader), database, and other programs.
It will be appreciated by those skilled in the art that embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
Heretofore, a data transmission method based on the internet of vehicles, a data transmission device based on the internet of vehicles, and a computer-readable storage medium according to the present disclosure have been described in detail. In order to avoid obscuring the concepts of the present disclosure, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.
The methods and systems of the present disclosure may be implemented in a number of ways. For example, the methods and systems of the present disclosure may be implemented by software, hardware, firmware, or any combination of software, hardware, firmware. The above-described sequence of steps for the method is for illustration only, and the steps of the method of the present disclosure are not limited to the sequence specifically described above unless specifically stated otherwise. Furthermore, in some embodiments, the present disclosure may also be implemented as programs recorded in a recording medium, the programs including machine-readable instructions for implementing the methods according to the present disclosure. Thus, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (11)
1. A data transmission method based on the internet of vehicles, which is executed by a node in the internet of vehicles, the internet of vehicles being constructed based on a content-centric network CCN, the data transmission method comprising:
receiving data requests from other nodes, wherein the nodes are in direct communication with the other nodes through the CCN;
counting the request times of different data;
determining the data of which the request times reach or exceed a threshold value as data to be cached;
and sending a notice for caching the data to be cached to at least some other nodes in a data transmission link, so that the nodes acquire the data to be cached through the other nodes, wherein the data transmission link is used for transmitting a data request corresponding to the data to be cached.
2. The data transmission method according to claim 1, further comprising: a data request is sent to the other node,
and under the condition that all other nodes in the data transmission range of the node do not cache the data corresponding to the data request, transmitting the data request to other nodes outside the data transmission range through a forwarding node, wherein the forwarding node is positioned at the edge of the data transmission range.
3. The data transmission method according to claim 1, further comprising:
transmitting a data request to a road side unit under the condition that the node is located in the coverage area of the road side unit;
and sending data requests to other nodes except the road side unit under the condition that the node is located outside the coverage area of the road side unit.
4. A data transmission method according to claim 2 or 3, wherein,
and under the condition that all other nodes in the data transmission range of the node do not cache the data corresponding to the data request, when the node enters the coverage area of the road side unit, sending the data request to the road side unit.
5. A data transmission device based on the internet of vehicles, the internet of vehicles being constructed based on a content centric network CCN, the data transmission device comprising:
the receiver is used for receiving data requests from other nodes in the internet of vehicles, and the nodes in the internet of vehicles and the other nodes are directly communicated through the CCN;
the processor is used for counting the request times of different data and determining the data of which the request times reach or exceed a threshold value as the data to be cached;
and the transmitter is used for transmitting a notice for caching the data to be cached to at least some other nodes in a data transmission link so that the nodes acquire the data to be cached through the other nodes, and the data transmission link is used for transmitting a data request corresponding to the data to be cached.
6. The data transmission device of claim 5, wherein,
the transmitter is also configured to send data requests to other nodes,
and under the condition that all other nodes in the data transmission range of the node do not cache the data corresponding to the data request, transmitting the data request to other nodes outside the data transmission range through a forwarding node, wherein the forwarding node is positioned at the edge of the data transmission range.
7. The data transmission device of claim 5, wherein,
the transmitter transmits a data request to a road side unit when the node is located within a coverage area of the road side unit, and transmits a data request to other nodes except the road side unit when the node is located outside the coverage area of the road side unit.
8. The data transmission device according to claim 6 or 7, wherein,
and the transmitter transmits the data request to the road side unit when the node enters the coverage area of the road side unit under the condition that all other nodes in the data transmission range of the node do not buffer the data corresponding to the data request.
9. A data transmission device based on internet of vehicles, comprising:
the receiving module is used for receiving data requests from other nodes in the Internet of vehicles, and the nodes in the Internet of vehicles and the other nodes are directly communicated through a Content Center Network (CCN);
the statistics module is used for counting the request times of different data;
the determining module is used for determining the data of which the request times reach or exceed a threshold value as data to be cached;
and the sending module is used for sending a notice of caching the data to be cached to at least some other nodes in a data transmission link so that the nodes can acquire the data to be cached through the other nodes, and the data transmission link is used for transmitting a data request corresponding to the data to be cached.
10. A data transmission device based on internet of vehicles, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform one or more steps of the internet of vehicles-based data transfer method of any of claims 1-4 based on instructions stored in the memory device.
11. A computer readable storage medium having stored thereon a computer program which when executed by a processor performs one or more of the steps of the internet of vehicles based data transfer method of any of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810292887.4A CN110324389B (en) | 2018-03-30 | 2018-03-30 | Data transmission method and device based on Internet of vehicles and computer readable storage medium |
Applications Claiming Priority (1)
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| CN110856148B (en) * | 2019-11-15 | 2020-08-21 | 深圳市东方拓宇科技有限公司 | Data transmission method, system, device and medium based on 5G communication |
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