Communication method of roadside edge device, roadside edge device and vehicle-road cooperation system

Abstract

The invention discloses a communication method of roadside edge equipment. The communication method comprises the following steps: acquiring each channel of a plurality of base stations around the roadside edge equipment fixed at a preset position; determining the quality of each channel; selecting and locking a first channel with optimal quality and a second channel with suboptimal quality; and a first wireless communication module of the roadside edge equipment sends data to a base station corresponding to the first channel by using the first channel, and a second wireless communication module sends the same data to a base station corresponding to the second channel by using the second channel. The invention further discloses the roadside edge equipment and a vehicle-road cooperation system. According to the scheme provided by the invention, the two different channels are selected for the roadside edge device fixed at the preset position, and the same data are transmitted by respectively utilizing the two channels, so that the transmission paths of the two wireless communication modules are optimized, and the lowest transmission delay is ensured.

Description

Technical Field

[0001] The present invention relates to the field of vehicle-road collaboration, and in particular to a communication method for roadside edge devices, roadside edge devices and a vehicle-road collaboration system. Background Art

[0002] In the prior art, only one data transmission line is used during the data transmission process. Especially in the field of vehicle-road collaboration, low data latency needs to be guaranteed. However, if data is transmitted through only one data transmission line, and part of the transmitted data is lost or the data transmission line is interfered with, the receiving end cannot receive the relevant transmission data in time, which will seriously affect the vehicle-road collaboration. Summary of the invention

[0003] In view of this, in order to overcome at least one aspect of the above problems, an embodiment of the present invention proposes a communication method of a roadside edge device, comprising the following steps:

[0004] Acquire each channel of a plurality of base stations around a roadside edge device fixed at a preset position;

[0005] determining a quality of each of said channels;

[0006] Select and lock a first channel with the best quality and a second channel with the second best quality;

[0007] The first wireless communication module of the roadside edge device sends data to a base station corresponding to the first channel using the first channel, and the second wireless communication module sends the same data to a base station corresponding to the second channel using the second channel.

[0008] In some embodiments, selecting and locking a first channel with the best quality and a second channel with the second best quality further comprises:

[0009] A first channel with the best quality and a second channel with the second best quality are preferentially selected and locked from different base stations.

[0010] In some embodiments, determining the quality of each of the channels further comprises:

[0011] The quality of each of the channels is determined according to the signal-to-noise ratio and the received reference power.

[0012] In some embodiments, selecting and locking a first channel with the best quality and a second channel with the second best quality further comprises:

[0013] Obtaining a first threshold value corresponding to the signal-to-noise ratio, and obtaining a second threshold value corresponding to the received reference power;

[0014] The first channel and the second channel whose signal-to-noise ratio is greater than the first threshold value and whose receiving reference power is greater than the fourth threshold value are selected from each of the channels, and enter a locked state.

[0015] In some embodiments, it also includes:

[0016] Acquire a third threshold value and a fourth threshold value corresponding to the signal-to-noise ratio, and acquire a fifth threshold value and a sixth threshold value corresponding to the receive reference power, wherein the third threshold value is less than the first threshold value and greater than the fourth threshold value, and the fifth threshold value is less than the second threshold value and greater than the sixth threshold value;

[0017] In response to detecting that the signal-to-noise ratio of the first channel and / or the second channel is less than the third threshold value and greater than the fourth threshold value, and / or the receiving reference power of the first channel and / or the second channel is less than the fifth threshold value and greater than the sixth threshold value, entering a switching state to reselect the first channel with the best quality and the second channel with the second best quality.

[0018] In some embodiments, it also includes:

[0019] In response to detecting that the signal-to-noise ratio of the first channel and / or the second channel is less than the fourth threshold value, and the receiving reference power is less than the sixth threshold value, immediately reselecting the first channel with the best quality and the second channel with the second best quality.

[0020] In some embodiments, it also includes:

[0021] The quality of the first channel and the second channel are compared and the one with the worst quality is switched first and the next switching is performed after a preset time period.

[0022] In some embodiments, it also includes:

[0023] Using sensors to obtain point cloud spatial information and obtain real-time occupancy information and spatiotemporal occupancy information of resources in the base station;

[0024] Performing a model evaluation of path loss and channel loss according to the point cloud spatial information, the real-time occupancy information, and the spatiotemporal occupancy information;

[0025] The first channel and the second channel are switched in advance according to the evaluation result.

[0026] Based on the same inventive concept, according to another aspect of the present invention, an embodiment of the present invention further provides a roadside edge device, including:

[0027] A selection module, used for acquiring each channel of a plurality of base stations around a roadside edge device fixed at a preset position and determining the quality of each of the channels, so as to select and lock a first channel with the best quality and a second channel with the second best quality;

[0028] A first wireless communication module, used for transmitting data via the first channel;

[0029] The second wireless communication module is used for data transmission via the second channel.

[0030] Based on the same inventive concept, according to another aspect of the present invention, an embodiment of the present invention further provides a vehicle-road cooperative system, comprising a plurality of the above-mentioned roadside edge devices and a plurality of base stations.

[0031] The present invention has one of the following beneficial technical effects: the solution proposed in the present invention optimizes the transmission paths of the two wireless communication modules by selecting two different channels for the roadside edge device fixed at a preset position, and using the two channels to transmit the same data respectively, thereby ensuring the minimum transmission delay. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic flow chart of a communication method for a roadside edge device provided in an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of the structure of a roadside edge device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0036] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0037] According to one aspect of the present invention, an embodiment of the present invention provides a communication method for a roadside edge device, such as Figure 1As shown, it may include the steps of:

[0038] S1, obtaining each channel of a plurality of base stations around a roadside edge device fixed at a preset position;

[0039] S2, determining the quality of each of the channels;

[0040] S3, selecting and locking a first channel with the best quality and a second channel with the second best quality;

[0041] S4, the first wireless communication module of the roadside edge device sends data to the base station corresponding to the first channel by using the first channel, and the second wireless communication module sends the same data to the base station corresponding to the second channel by using the second channel.

[0042] The solution proposed in the present invention optimizes the transmission paths of the two wireless communication modules by selecting two different channels for the roadside edge device fixed at a preset position and using the two channels to transmit the same data respectively, thereby ensuring the minimum transmission delay.

[0043] In some embodiments, selecting and locking a first channel with the best quality and a second channel with the second best quality further comprises:

[0044] A first channel with the best quality and a second channel with the second best quality are preferentially selected and locked from different base stations.

[0045] Specifically, since each roadside edge device is fixed on an immovable object, the selectable base stations around it are also determined. In order to ensure the minimum transmission delay of data transmission, two channels of two base stations are preferentially selected, that is, the first wireless communication module of the roadside edge device uses the first channel of the first base station to send data to the first base station, and the second wireless communication module uses the second channel of the second base station to send data to the second base station. In the embodiment of the present invention, different base stations are combined into a fusion layer, and the data sent by the roadside edge device is processed in the fusion layer. Since the roadside edge device sends the same data through two different channels, the fusion layer can extract data on a first-come, first-served basis when receiving data.

[0046] In some embodiments, determining the quality of each of the channels further comprises:

[0047] The quality of each of the channels is determined according to the signal-to-noise ratio and the received reference power.

[0048] Specifically, each wireless communication module can determine the quality of each channel through a signal-to-noise ratio (SINR) and a received reference power (RSRP), thereby dynamically switching between different base stations and different channels.

[0049] In some embodiments, selecting and locking a first channel with the best quality and a second channel with the second best quality further comprises:

[0050] Obtaining a first threshold value corresponding to the signal-to-noise ratio, and obtaining a second threshold value corresponding to the received reference power;

[0051] The first channel and the second channel whose signal-to-noise ratio is greater than the first threshold value and whose receiving reference power is greater than the fourth threshold value are selected from each of the channels, and enter a locked state.

[0052] In some embodiments, it also includes:

[0053] Acquire a third threshold value and a fourth threshold value corresponding to the signal-to-noise ratio, and acquire a fifth threshold value and a sixth threshold value corresponding to the receive reference power, wherein the third threshold value is less than the first threshold value and greater than the fourth threshold value, and the fifth threshold value is less than the second threshold value and greater than the sixth threshold value;

[0054] In response to detecting that the signal-to-noise ratio of the first channel and / or the second channel is less than the third threshold value and greater than the fourth threshold value, and / or the receiving reference power of the first channel and / or the second channel is less than the fifth threshold value and greater than the sixth threshold value, entering a switching state to reselect the first channel with the best quality and the second channel with the second best quality.

[0055] In some embodiments, it also includes:

[0056] In response to detecting that the signal-to-noise ratio of the first channel and / or the second channel is less than the fourth threshold value, and the receiving reference power is less than the sixth threshold value, immediately reselecting the first channel with the best quality and the second channel with the second best quality.

[0057] Specifically, the signal-to-noise ratio and the receiving reference power can be set to three threshold values ​​respectively, that is, the signal-to-noise ratio can be set to a first threshold value, a third threshold value and a fourth threshold value, wherein the first threshold value> the third threshold value> the fourth threshold value, wherein the first threshold value indicates a good signal-to-noise ratio, the third threshold value indicates an average signal-to-noise ratio, and the fourth threshold value indicates a poor signal-to-noise ratio. The receiving reference power can be set to a second threshold value, a fifth threshold value and a sixth threshold value, wherein the second threshold value> the fifth threshold value> the sixth threshold value, wherein the second threshold value indicates a good receiving reference power, the fifth threshold value indicates an average receiving reference power, and the sixth threshold value indicates a poor receiving reference power.

[0058] When the signal-to-noise ratio is greater than the first threshold value and the received reference power is greater than the fourth threshold value, it indicates that the channel quality is good, the channel can be selected and the locked state can be entered. When the signal-to-noise ratio is less than the third threshold value and greater than the fourth threshold value, and / or the received reference power is less than the fifth threshold value and greater than the sixth threshold value, it indicates that the channel quality is poor and needs to be switched, enter the switching mode, and reselect the channel. If the signal-to-noise ratio is less than the fourth threshold value and the received reference power is less than the sixth threshold value, it indicates that the channel quality is poor and needs to be switched immediately.

[0059] In some embodiments, it also includes:

[0060] The quality of the first channel and the second channel are compared and the one with the worst quality is switched first and the next switching is performed after a preset time period.

[0061] Specifically, when it is necessary to switch channels, the channel with the worst signal-to-noise ratio and received reference power is switched first, and only one link is allowed to switch at the same time. After switching, a minimum stable time must be maintained before the next switch or another channel can be made.

[0062] In some embodiments, it also includes:

[0063] Using sensors to obtain point cloud spatial information and obtain real-time occupancy information and spatiotemporal occupancy information of resources in the base station;

[0064] Performing a model evaluation of path loss and channel loss according to the point cloud spatial information, the real-time occupancy information, and the spatiotemporal occupancy information;

[0065] The first channel and the second channel are switched in advance according to the evaluation result.

[0066] Specifically, the base station can read the real-time occupancy information of the baseband processing unit (BBU) resources, such as real-time resource occupancy, power, channels, etc., as well as time-space occupancy information, such as loads during peak hours in the morning and evening, beam information in different directions, etc. In this way, the adjustment of the roadside edge device channel and the base station can be combined with the real-time occupancy information and time-space occupancy information of the base station resources while utilizing the signal-to-noise ratio and the receiving reference power, and the point cloud space information (such as buildings) obtained by the sensor to perform a model evaluation of the path loss and channel loss (such as the free space model and the Stanford University channel model), and switch the first channel and the second channel in advance according to the evaluation results, so as to increase the transmission and reception power and improve the transmission and reception gain.

[0067] The solution proposed in the present invention optimizes the transmission paths of the two wireless communication modules by selecting two different channels for the roadside edge device fixed at a preset position and using the two channels to transmit the same data respectively, thereby ensuring the minimum transmission delay.

[0068] Based on the same inventive concept, according to another aspect of the present invention, Figure 2 As shown, an embodiment of the present invention further provides a roadside edge device 400, including:

[0069] A selection module 401 is used to obtain each channel of a plurality of base stations around a roadside edge device fixed at a preset position and determine the quality of each of the channels, so as to select and lock a first channel with the best quality and a second channel with the second best quality;

[0070] A first wireless communication module 402, configured to perform data transmission via the first channel;

[0071] The second wireless communication module 403 is configured to perform data transmission via the second channel.

[0072] In some embodiments, the selection module is further configured to:

[0073] A first channel with the best quality and a second channel with the second best quality are preferentially selected and locked from different base stations.

[0074] In some embodiments, determining the quality of each of the channels further comprises:

[0075] The quality of each of the channels is determined according to the signal-to-noise ratio and the received reference power.

[0076] In some embodiments, the selection module is further configured to:

[0077] Obtaining a first threshold value corresponding to the signal-to-noise ratio, and obtaining a second threshold value corresponding to the received reference power;

[0078] The first channel and the second channel whose signal-to-noise ratio is greater than the first threshold value and whose receiving reference power is greater than the fourth threshold value are selected from each of the channels, and enter a locked state.

[0079] In some embodiments, the selection module is further configured to:

[0080] Acquire a third threshold value and a fourth threshold value corresponding to the signal-to-noise ratio, and acquire a fifth threshold value and a sixth threshold value corresponding to the receive reference power, wherein the third threshold value is less than the first threshold value and greater than the fourth threshold value, and the fifth threshold value is less than the second threshold value and greater than the sixth threshold value;

[0081] In response to detecting that the signal-to-noise ratio of the first channel and / or the second channel is less than the third threshold value and greater than the fourth threshold value, and / or the receiving reference power of the first channel and / or the second channel is less than the fifth threshold value and greater than the sixth threshold value, entering a switching state to reselect the first channel with the best quality and the second channel with the second best quality.

[0082] In some embodiments, the selection module is further configured to:

[0083] In response to detecting that the signal-to-noise ratio of the first channel and / or the second channel is less than the fourth threshold value, and the receiving reference power is less than the sixth threshold value, immediately reselecting the first channel with the best quality and the second channel with the second best quality.

[0084] In some embodiments, the selection module is further configured to:

[0085] The quality of the first channel and the second channel are compared and the one with the worst quality is switched first and the next switching is performed after a preset time period.

[0086] In some embodiments, the selection module is further configured to:

[0087] Using sensors to obtain point cloud spatial information and obtain real-time occupancy information and spatiotemporal occupancy information of resources in the base station;

[0088] Performing a model evaluation of path loss and channel loss according to the point cloud spatial information, the real-time occupancy information, and the spatiotemporal occupancy information;

[0089] The first channel and the second channel are switched in advance according to the evaluation result.

[0090] Based on the same inventive concept, according to another aspect of the present invention, based on the same inventive concept, according to another aspect of the present invention, an embodiment of the present invention also provides a vehicle-road cooperative system, including multiple roadside edge devices and multiple base stations as described above.

[0091] Finally, it should be noted that a person skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods.

[0092] Furthermore, it should be appreciated that the computer-readable storage medium (eg, memory) herein may be either a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memory.

[0093] It will also be appreciated by those skilled in the art that various exemplary logic blocks, modules, circuits and algorithm steps described in conjunction with the disclosure herein can be implemented as electronic hardware, computer software or a combination of the two. In order to clearly illustrate this interchangeability of hardware and software, a general description has been given to the functions of various schematic components, blocks, modules, circuits and steps. Whether this function is implemented as software or hardware depends on specific applications and the design constraints imposed on the entire system. Those skilled in the art can implement the function in various ways for each specific application, but this implementation decision should not be interpreted as causing a departure from the disclosed scope of the embodiments of the present invention.

[0094] The above are exemplary embodiments disclosed in the present invention, but it should be noted that various changes and modifications may be made without departing from the scope disclosed in the embodiments of the present invention as defined in the claims. The functions, steps and / or actions of the method claims according to the disclosed embodiments described herein do not need to be performed in any particular order. In addition, although the elements disclosed in the embodiments of the present invention may be described or required in individual form, they may also be understood as multiple unless explicitly limited to the singular.

[0095] It should be understood that, as used herein, the singular forms "a", "an" are intended to include the plural forms as well, unless the context clearly supports an exception. It should also be understood that, as used herein, "and / or" refers to any and all possible combinations including one or more of the associated listed items.

[0096] The serial numbers of the embodiments disclosed in the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0097] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0098] A person skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the disclosure of the embodiments of the present invention (including the claims) is limited to these examples; under the concept of the embodiments of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the embodiments of the present invention as above, which are not provided in detail for the sake of simplicity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A communication method for a roadside edge device, characterized in that: The following steps are involved: Acquire each channel of a plurality of base stations around a roadside edge device fixed at a preset position; determining a quality of each of said channels; Select and lock a first channel with the best quality and a second channel with the second best quality; The first wireless communication module of the roadside edge device sends data to a base station corresponding to the first channel using the first channel, and the second wireless communication module sends the same data to a base station corresponding to the second channel using the second channel.

2. The method according to claim 1, characterized in that Selecting and locking a first channel with the best quality and a second channel with the second best quality further includes: A first channel with the best quality and a second channel with the second best quality are preferentially selected and locked from different base stations.

3. The method according to claim 1, characterized in that Determining the quality of each of the channels further comprises: The quality of each of the channels is determined according to the signal-to-noise ratio and the received reference power.

4. The method according to claim 3, characterized in that Selecting and locking a first channel with the best quality and a second channel with the second best quality further includes: Obtaining a first threshold value corresponding to the signal-to-noise ratio, and obtaining a second threshold value corresponding to the received reference power; The first channel and the second channel whose signal-to-noise ratio is greater than the first threshold value and whose receiving reference power is greater than the fourth threshold value are selected from each of the channels, and enter a locked state.

5. The method according to claim 4, characterized in that Also includes: Acquire a third threshold value and a fourth threshold value corresponding to the signal-to-noise ratio, and acquire a fifth threshold value and a sixth threshold value corresponding to the receive reference power, wherein the third threshold value is less than the first threshold value and greater than the fourth threshold value, and the fifth threshold value is less than the second threshold value and greater than the sixth threshold value; In response to detecting that the signal-to-noise ratio of the first channel and / or the second channel is less than the third threshold value and greater than the fourth threshold value, and / or the receiving reference power of the first channel and / or the second channel is less than the fifth threshold value and greater than the sixth threshold value, entering a switching state to reselect the first channel with the best quality and the second channel with the second best quality.

6. The method according to claim 4, characterized in that Also includes: In response to detecting that the signal-to-noise ratio of the first channel and / or the second channel is less than the fourth threshold value, and the receiving reference power is less than the sixth threshold value, immediately reselecting the first channel with the best quality and the second channel with the second best quality.

7. The method according to claim 5 or 6, characterized in that Also includes: The quality of the first channel and the second channel are compared and the one with the worst quality is switched first and the next switching is performed after a preset time period.

8. The method according to claim 1, characterized in that Also includes: Using sensors to obtain point cloud spatial information and obtain real-time occupancy information and spatiotemporal occupancy information of resources in the base station; Performing a model evaluation of path loss and channel loss according to the point cloud spatial information, the real-time occupancy information, and the spatiotemporal occupancy information; The first channel and the second channel are switched in advance according to the evaluation result.

9. A roadside edge device, characterized in that: include: A selection module, used for acquiring each channel of a plurality of base stations around a roadside edge device fixed at a preset position and determining the quality of each of the channels, so as to select and lock a first channel with the best quality and a second channel with the second best quality; A first wireless communication module, used for transmitting data via the first channel; The second wireless communication module is used for data transmission via the second channel.

10. A vehicle-road cooperative system, characterized in that: The method comprises a plurality of roadside edge devices as claimed in claim 9 and a plurality of base stations.

Images