A data sending method, apparatus, device and medium

Abstract

The application discloses a data sending method, device and equipment and a medium. The data sending method comprises the following steps: obtaining a target synchronization signal sent by a neighbor vehicle Internet of Things device node of a current vehicle Internet of Things device node; determining a timing offset data set according to the target synchronization signal, and determining target timing offset data according to the timing offset data set and a current data sending mode of the current vehicle Internet of Things device node; updating a pre-sending time of to-be-sent data of the current vehicle Internet of Things device node according to the target timing offset data; and sending the to-be-sent data of the current vehicle Internet of Things device node according to the pre-sending time and the current data sending mode. The technical scheme of the embodiment of the application can improve the transmission distance between vehicle Internet of Things device nodes and expand the communication coverage range under the premise of ensuring correct decoding of vehicle Internet of Things data.

Description

Technical Field

[0001] This invention relates to the field of vehicle networking technology, and in particular to a data transmission method, apparatus, device, and medium. Background Technology

[0002] When communicating, the vehicle-to-everything (V2X) device nodes rely on external GNSS (Global Navigation Satellite System) timing to obtain relatively accurate 1ms timing, which is then used as the frame boundary for communication.

[0003] After receiving data, the vehicle-to-everything (V2X) device nodes remove CP (Cyclic Prefix) data according to frame timing boundaries, and then perform a Fast Fourier Transform (FFT) on the time-domain data to obtain the frequency-domain data. During CP data removal, fixed CP data removal is performed based on GNSS timing. Figure 1 As shown, when the vehicular network (V2X) device nodes are close together, the data truncation point (CP) is still within the CP, so the extracted data contains complete and valid data. However, when the V2X device nodes are far apart, the extracted data is no longer complete and valid, resulting in data errors and inability to be correctly parsed. Since the transmission distance in V2X is affected by the CP length and the CP truncation position, when the latency caused by the transmission distance exceeds the time corresponding to the CP truncation position, valid data will be lost, resulting in incorrect data after CP removal and inability to be correctly decoded.

[0004] Currently, the transmission distance between vehicles is mainly extended by adjusting the maximum transmit power, the maximum number of retransmissions per transport block, the maximum number of sub-channels allowed by the PSSCH (Physical Direct Communication Interface Shared Channel), the minimum number of sub-channels allowed by the PSSCH, the maximum MCS (Modulation and Coding Scheme) level allowed by the PSSCH, the minimum MCS level allowed by the PSSCH, or the maximum channel occupancy rate allowed by the PSSCH. However, the extension of transmission distance is limited, and the above parameter adjustment methods cannot solve the problem of effective data decoding errors in long-distance data transmission in vehicle-to-everything (V2X) networks. Summary of the Invention

[0005] This invention provides a data transmission method, apparatus, device, and medium that can improve the transmission distance between vehicle network device nodes and expand the communication coverage while ensuring the correct decoding of vehicle network data.

[0006] According to one aspect of the present invention, a data transmission method is provided, comprising:

[0007] Obtain the target synchronization signal sent by the neighboring vehicle network device nodes of the current vehicle network device node;

[0008] Based on the target synchronization signal, determine the timing deviation dataset, and based on the timing deviation dataset and the current data transmission method of the current vehicle network device node, determine the target timing deviation data;

[0009] Based on the target timing deviation data, update the pre-send time of the data to be sent for the current vehicle-to-everything (V2X) device node;

[0010] Based on the previous sending time and the current data sending method, send the data to be sent for the current vehicle network device node.

[0011] According to another aspect of the present invention, a data transmission apparatus is provided, comprising:

[0012] The synchronization signal acquisition module is used to acquire the target synchronization signal sent by the neighboring vehicle network device nodes of the current vehicle network device node;

[0013] The target timing deviation data determination module is used to determine the timing deviation dataset based on the target synchronization signal, and to determine the target timing deviation data based on the timing deviation dataset and the current data transmission method of the current vehicle network device node.

[0014] The pre-transmission time update module is used to update the pre-transmission time of the data to be transmitted of the current vehicle network device node according to the target timing deviation data;

[0015] The data transmission module is used to send the data to be sent by the current vehicle network device node according to the previous transmission time and the current data transmission method.

[0016] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0017] At least one processor; and

[0018] A memory communicatively connected to the at least one processor; wherein,

[0019] The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the data transmission method according to any embodiment of the present invention.

[0020] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the data transmission method described in any embodiment of the present invention.

[0021] The technical solution of this invention obtains the target synchronization signal sent by the neighboring vehicle-to-everything (V2X) device nodes of the current V2X device node, then determines the timing deviation dataset based on the target synchronization signal, and determines the target timing deviation data based on the timing deviation dataset and the current data transmission method of the current V2X device node. Based on the target timing deviation data, the pre-transmission time of the data to be transmitted by the current V2X device node is updated, and the data to be transmitted by the current V2X device node is transmitted based on the pre-transmission time and the current data transmission method. The target timing deviation data in this solution reflects the timing deviation between the neighboring V2X device nodes and the current V2X device node. Using the updated pre-transmission time based on the target timing deviation data to transmit the data to be transmitted enables the data to be transmitted in advance. This not only expands the communication range but also, to a certain extent, avoids the problem of V2X data decoding errors caused by long-distance transmission. It solves the problems of limited transmission distance extension and effective data decoding errors in long-distance data transmission in existing technologies, and can improve the transmission distance between V2X device nodes and expand the communication coverage while ensuring correct decoding of V2X data.

[0022] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of timing deviation provided by the background art of the present invention;

[0025] Figure 2 This is a flowchart of a data transmission method provided in Embodiment 1 of the present invention;

[0026] Figure 3 This is a flowchart of a data transmission method provided in Embodiment 2 of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of a data transmission device provided in Embodiment 3 of the present invention;

[0028] Figure 5 A schematic diagram of an electronic device that can be used to implement embodiments of the present invention is shown. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "original," "target," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] Example 1

[0032] Figure 2 This is a flowchart of a data transmission method provided in Embodiment 1 of the present invention. This embodiment is applicable to the long-distance reliable transmission of vehicle network data. The method can be executed by a data transmission device, which can be implemented in hardware and / or software and can be configured in an electronic device. Figure 2 As shown, the method includes:

[0033] S110. Obtain the target synchronization signal sent by the neighboring vehicle network device nodes of the current vehicle network device node.

[0034] In this context, the current vehicle-to-everything (V2X) device node can be any device on the road capable of data transmission and reception. Neighboring V2X device nodes can be any other V2X device node within the communication radius of the specified V2X device node, excluding the specified V2X device node, that also possesses data transmission and reception capabilities. The current V2X device node and its neighboring V2X device nodes belong to the same vehicular ad hoc subnetwork. V2X device nodes within a single vehicular ad hoc subnetwork can exchange data, and multiple vehicular ad hoc subnetworks can constitute a single vehicular ad hoc network. Optionally, the device type of the current V2X device node and its neighboring V2X device nodes can be vehicles or roadside devices used in vehicle-to-infrastructure (V2I) communication. The device types of the current V2X device node and its neighboring V2X device nodes can be the same or different. For example, V2I roadside devices can include, but are not limited to, streetlights, surveillance cameras, and communication base stations.

[0035] The target synchronization signal can be the synchronization signal currently sent by the neighboring vehicular network device nodes of the current vehicular network device node. It is used to update the time when the current vehicular network device node sends data to at least one neighboring vehicular network device node. In other words, based on the latest acquired synchronization signal sent by the current vehicular network device node's neighboring vehicular network device nodes, the data transmission time of the current vehicular network device node is adjusted. Optionally, both the current vehicular network device node and its neighboring vehicular network device nodes can send synchronization signals according to a preset period. The preset period can be set according to the actual data decoding accuracy requirements.

[0036] In this embodiment of the invention, the function of sending synchronization signals by vehicle network device nodes can be enabled first, and then the target synchronization signal sent by the neighboring vehicle network device nodes of the current vehicle network device node can be determined. Based on the target synchronization signal sent by the neighboring vehicle network device nodes of the current vehicle network device node, the data transmission time of the current vehicle network device node can be adjusted.

[0037] S120. Determine the timing deviation data set based on the target synchronization signal, and determine the target timing deviation data based on the timing deviation data set.

[0038] The timing deviation dataset can be a collection of timing deviations between neighboring vehicular network (V2N) device nodes and the current V2N device node. The data to be sent can be the data that the current V2N device node needs to send to at least one neighboring V2N device node. The target timing deviation data can be data determined based on the current V2N device node's data transmission needs and the timing deviation dataset, used to update the current V2N device node's data transmission time.

[0039] In this embodiment of the invention, the timing deviation between the neighboring vehicle network device nodes and the current vehicle network device node is determined based on the target synchronization signal sent by the neighboring vehicle network device nodes and the timing deviation estimation algorithm. A timing deviation dataset is then generated based on the timing deviation between the neighboring vehicle network device nodes and the current vehicle network device node. Furthermore, a timing deviation is selected from the timing deviation dataset based on the data transmission needs of the current vehicle network device node, and then the target timing deviation data is determined based on the timing deviation.

[0040] The timing deviation estimation algorithm can be any existing algorithm used for timing deviation estimation.

[0041] S130. Based on the target timing deviation data, update the pre-transmission time of the data to be sent for the current vehicle network device node.

[0042] The pre-transmission time can be determined based on the target timing deviation data, which is the time when the current vehicle network device node sends the data to be sent.

[0043] The pre-transmission time is earlier than the original transmission time of the data to be transmitted by the current vehicle-to-everything (V2X) device node. The original transmission time of the data to be transmitted by the current V2X device node is the transmission time of the data to be transmitted by the current V2X device node before it is updated according to the target timing deviation data. Assuming that the original transmission time of the data to be transmitted is t1, then the pre-transmission time t2 of the data to be transmitted is earlier than t1, and the difference between t2 and t1 is determined by the target timing deviation data.

[0044] In this embodiment of the invention, the transmission time advance of the original transmission time of the data to be transmitted by the current vehicle network device node can be determined based on the target timing deviation data. Then, the difference between the original transmission time of the data to be transmitted by the current vehicle network device node and the transmission time advance is used as the advance transmission time of the data to be transmitted by the current vehicle network device node.

[0045] For example, assuming that the lead time of the original transmission time of the data to be transmitted by the current vehicle network device node is △t, and the original transmission time of the data to be transmitted is t1, then the lead time of the data to be transmitted is t2 = t1 - △t.

[0046] S140. Based on the previous sending time and the current data sending method, send the data to be sent for the current vehicle network device node.

[0047] The current data transmission method can be the data transmission method used by the current vehicle-to-everything (V2X) device node to send the data to be sent. The current data transmission method can include broadcast or unicast.

[0048] In this embodiment of the invention, the data to be sent by the current vehicle network device node can be sent to at least one vehicle network device node that is the data receiver during the pre-send time, according to the current data transmission method.

[0049] When the current data transmission method is broadcast, the data to be transmitted by the current vehicle-to-everything (V2X) device node is broadcast to all its neighboring V2X device nodes. When the current data transmission method is unicast, the data to be transmitted by the current V2X device node is unicast to one of its neighboring V2X device nodes that is the data receiver.

[0050] Normally, the communication coverage is determined only by the length of the intercepted CP. In this scheme, sending the data to be sent in advance can advance the original sending time of the data to be sent of the current vehicle network device node, thereby increasing the communication coverage. The specific increase is the product of the advance sending time and the speed of light.

[0051] Optionally, after sending the data to be sent by the current vehicle network device node according to the pre-send time and the current data transmission method, it can further return to execute the operation of obtaining the target synchronization signal sent by the neighboring vehicle network device nodes of the current vehicle network device node, so as to continuously update the pre-send time of the data to be sent by the current vehicle network device node and ensure that the interactive data of the vehicle network device nodes in the vehicle network can be accurately decoded.

[0052] The technical solution of this invention obtains the target synchronization signal sent by the neighboring vehicle-to-everything (V2X) device nodes of the current V2X device node, then determines the timing deviation dataset based on the target synchronization signal, and determines the target timing deviation data based on the timing deviation dataset and the current data transmission method of the current V2X device node. Based on the target timing deviation data, the pre-transmission time of the data to be transmitted by the current V2X device node is updated, and the data to be transmitted by the current V2X device node is transmitted based on the pre-transmission time and the current data transmission method. The target timing deviation data in this solution reflects the timing deviation between the neighboring V2X device nodes and the current V2X device node. Using the updated pre-transmission time based on the target timing deviation data to transmit the data to be transmitted enables the data to be transmitted in advance. This not only expands the communication range but also, to a certain extent, avoids the problem of V2X data decoding errors caused by long-distance transmission. It solves the problems of limited transmission distance extension and effective data decoding errors in long-distance data transmission in existing technologies, and can improve the transmission distance between vehicles and expand the communication coverage while ensuring correct decoding of V2X data.

[0053] Example 2

[0054] Figure 3 This is a flowchart of a data transmission method provided in Embodiment 2 of the present invention. Based on the above embodiments, this embodiment provides an optional implementation method for enabling the synchronization signal transmission function of a vehicle-to-everything (V2X) device node before acquiring the target synchronization signal sent by the neighboring V2X device nodes of the current V2X device node. For example... Figure 3 As shown, the method includes:

[0055] S210. Obtain the synchronization signal configuration parameters of the current vehicle network device node and its neighboring vehicle network device nodes.

[0056] Among them, the synchronization signal configuration parameters can be used to enable the function of sending synchronization signals by the vehicle network device nodes.

[0057] In this embodiment of the invention, the synchronization signal configuration parameters of the current vehicle network device node and its neighboring vehicle network device nodes can be determined according to the communication protocol of the vehicle network to which the current vehicle network device node is located.

[0058] S220. Based on the synchronization signal configuration parameters, enable the synchronization signal transmission function of the current vehicle network device node and its neighboring vehicle network device nodes.

[0059] Among them, the synchronization signal transmission function can enable the vehicle network device nodes in the vehicle network to send synchronization signals at a certain frequency.

[0060] In this embodiment of the invention, the network configuration parameters of the current vehicle network device node and its neighboring vehicle network device nodes can be initialized according to the synchronization signal configuration parameters, thereby enabling the synchronization signal transmission function of the current vehicle network device node and its neighboring vehicle network device nodes, so that the current vehicle network device node and its neighboring vehicle network device nodes can transmit synchronization signals at a certain frequency.

[0061] For example, according to the 3GPP (3rd Generation Partnership Project) specification 36.331, syncTxThreshOoC (the synchronization signal configuration parameter in specification 36.331) can be set to 11. When syncTxThreshOoC is set to 11, it indicates that the vehicular network device node is always enabled to send synchronization signals.

[0062] S230: Obtain the target synchronization signal sent by the neighboring vehicle network device nodes of the current vehicle network device node.

[0063] S240. Determine the timing deviation data set based on the target synchronization signal, and determine the target timing deviation data based on the timing deviation data set.

[0064] In an optional embodiment of the present invention, determining the target timing deviation data based on the timing deviation dataset may include: determining the discretized original data in the timing deviation dataset; obtaining a first discrete quantization unit, and determining a target discrete interval that matches the discretized original data based on the first discrete quantization unit; and using the lower limit of the target discrete interval as the target timing deviation data.

[0065] The discretized original data can be data from a timing deviation dataset, used for discretization quantization to determine the target timing deviation data. The first discretization quantization unit can be a pre-set quantization unit used to discretize the original data. The target discretization interval can be a discretization quantization interval that matches the original data, determined based on the first discretization unit.

[0066] In this embodiment of the invention, the discretized original data can be determined from the timing deviation dataset according to the data transmission requirements of the current vehicle network device node, thereby obtaining a pre-set first discretization unit. The discretized original data is then further discretized and quantized according to the first discretization unit to obtain a target discrete interval that matches the discretized original data. The lower limit of the target discrete interval is then used as the target timing deviation data.

[0067] Optionally, when the current data transmission method is broadcast, the discretized raw data can be the minimum value in the timing deviation dataset. When the current data transmission method is unicast, neighboring vehicle network device nodes that need to receive the data to be transmitted by the current vehicle network device node are identified, and timing deviations matching these neighboring vehicle network device nodes are filtered from the timing deviation dataset. The discretized raw data can be the timing deviations matching these neighboring vehicle network device nodes.

[0068] For example, when the current data transmission method is broadcast, assuming the first discretization unit is 16ms and the original discretized data is 18ms, the target discretization interval is [16ms, 32ms].

[0069] In an optional embodiment of the present invention, determining the target timing deviation data based on the timing deviation dataset may include: obtaining a second discretization unit; and determining the target timing deviation data based on the second discretization unit and the original discretized data.

[0070] The second discretization unit can be a different, pre-set quantization unit than the first discretization unit, used to discretize the original discretization data.

[0071] In this embodiment of the invention, a second discretization unit can be set first, and then the original discretized data can be discretized and quantized according to the second discretization unit to obtain the target timing deviation data.

[0072] S250. Based on the target timing deviation data, update the pre-transmission time of the data to be sent for the current vehicle network device node.

[0073] In an optional embodiment of the present invention, updating the pre-transmission time of the data to be transmitted of the current vehicle-to-everything (V2X) device node based on the target timing deviation data may include: obtaining the target protocol reserved field in the first transmission channel and determining the target parameter field in the target protocol reserved field that configures the target timing deviation data; determining the target configuration parameter of the target parameter field based on the target timing deviation data and a preset number of bytes; and updating the pre-transmission time of the data to be transmitted of the current V2X device node based on the target configuration parameter.

[0074] The first transmission channel can be a data transmission channel between the current vehicular network device node and its neighboring vehicular network device nodes. Optionally, the first transmission channel can be the PSCCH (Physical Side Link Control Channel). The target protocol reserved field can be a protocol reserved field in the communication protocol of the first transmission channel. The target parameter field can be a field in the target protocol reserved field that configures parameters based on the target timing deviation data. The preset byte count can be a pre-set number of bytes. The target configuration parameters can be the result of converting the target timing deviation data according to the preset byte count and preset number system. The preset number system can include, but is not limited to, binary.

[0075] In this embodiment of the invention, the target protocol reserved field of the communication protocol used by the first transmission channel can be obtained first, and then the target parameter field used for configuration based on the target timing deviation data in the target protocol reserved field can be determined. Based on the number of bytes that can be configured in the target parameter field, the preset number of bytes can be determined. The target timing deviation data can be converted according to the preset number of bytes and the preset number system to obtain the target configuration parameters. The target configuration parameters are then configured in the corresponding position of the target protocol reserved field to update the transmission time of the data to be transmitted of the current vehicle network device node, that is, to transmit the data to be transmitted at the advance transmission time.

[0076] In an optional embodiment of the present invention, updating the pre-transmission time of the data to be transmitted for the current vehicle-to-everything (V2X) device node based on the target timing deviation data may include: configuring a media access control unit for a second transmission channel; determining the transmission time parameter in the media access control unit based on the area identifier index range of the media access control unit and the target timing deviation data; and updating the pre-transmission time of the data to be transmitted for the current V2X device node based on the transmission time parameter.

[0077] The second transmission channel can be a different data transmission channel than the first transmission channel. The Media Access Control Unit (MAC CE) is equivalent to the MAC CE. The region identifier index can be an integer used by the Media Access Control Unit to set or return a value specifying a local or region-specific property, and can be represented based on the desired number system. The region identifier index range can be the data range of the region identifier index. The transmission time parameter can be data within the region identifier index range that matches the target timing deviation data.

[0078] In this embodiment of the invention, a media access control unit can be defined in the second transmission channel, and then the area identifier index range of the media access control unit can be determined. This allows for the establishment of a mapping relationship between the target timing deviation data and the values ​​in the area identifier index range of the media access control unit. The values ​​in the area identifier index range of the media access control unit that are mapped to the target timing deviation data are then used as the transmission time parameters in the media access control unit. Based on the transmission time parameters of the media access control unit in the second transmission channel, the transmission time of the data to be transmitted for the current vehicle network device node is updated, i.e., the data to be transmitted is transmitted at the pre-transmission time.

[0079] Optionally, the second transmission channel can be SL-SCH (Straight-through-link broadcast channel). When the current data transmission mode of the current vehicular network device node is broadcast mode, SL-SCH can be used to broadcast the data to be sent to the neighboring vehicular network device nodes of the current vehicular network device node.

[0080] S260. Based on the previous sending time and the current data sending method, send the data to be sent for the current vehicle network device node.

[0081] In an optional embodiment of the present invention, after sending the data to be sent by the current vehicle-to-everything (V2X) device node according to the pre-send time and the current data transmission method, the method may further include: when the current data transmission method of the current V2X device node is broadcast, obtaining the timing deviation data to be superimposed between the data receiving V2X device node and the current V2X device node; determining the timing deviation data to be processed for unicast between the data receiving V2X device node and the current V2X device node according to the target timing deviation data and the timing deviation data to be superimposed, so as to update the pre-send time of the data receiving V2X device node according to the timing deviation data to be processed.

[0082] The data receiving vehicular network device node can be one of the neighboring vehicular network device nodes of the current vehicular network device node that receives the data to be transmitted broadcast by the current vehicular network device node. The timing deviation data to be superimposed can be the difference between the timing deviation that matches the data receiving vehicular network device node in the timing deviation dataset and the corresponding timing deviation of the target timing deviation data. The timing deviation data to be processed can be the sum of the timing deviation corresponding to the target timing deviation data and the timing deviation data to be processed.

[0083] In this embodiment of the invention, when the current data transmission mode of the current vehicle-to-everything (V2X) device node is broadcast, the timing deviation data to be superimposed between the data receiving V2X device node and the current V2X device node can be determined based on the timing deviation data that matches the timing deviation of the data receiving V2X device node and the target timing deviation data. The sum of the target timing deviation data and the timing deviation data to be superimposed is then used as the timing deviation data to be processed for unicasting between the data receiving V2X device node and the current V2X device node. Furthermore, when the data receiving V2X device node receives the data to be broadcast by the current V2X device node and needs to send data to the current V2X device node via unicast, the timing deviation data to be processed can be used as the advance of the transmission time when the data receiving V2X device node sends data to the current V2X device node via unicast. The difference between the original transmission time of the data receiving V2X device node sending data to the current V2X device node via unicast and the timing deviation data to be processed is used as the advance transmission time of the data receiving V2X device node.

[0084] For example, the specific steps of the current vehicle-to-everything (V2X) device node's data transmission method under broadcast are as follows:

[0085] Step 1: Configure syncTxThreshOoC (the value range of this parameter is 0-11) to 11 (see specification 36.331), which means that the vehicle network device node will always enable the function of sending synchronization signals.

[0086] Step 2: After the current vehicle-to-everything (V2X) device node A joins the network, it first needs to listen to the SLSS (Sidelink Synchronization Signal) of its neighboring V2X device nodes. According to the protocol, the V2X device node must send an SLSS every 160ms and can receive the SLSSs of its neighboring V2X device nodes. It then estimates the timing deviation of the received SLSSs to obtain the timing deviation ΔT between the neighboring V2X device node i and the current V2X device node A. i .

[0087] Step 3: Summarize all timing deviations and find the smallest timing deviation (discrete raw data in broadcast mode) △T=min{△T i |i∈N}, where N is the total number of neighboring vehicle network device nodes.

[0088] Step 4: Currently, the terminal defaults to capturing a CP length of T. cp Therefore, the coverage area can be calculated as T. cp *c, where c is the speed of light.

[0089] Step 5: After the advance of △T, the overall data transmission time is shifted forward by △T, therefore the corresponding coverage area is expanded from the original T. CP The increase of ×c is (T) CP +ΔT)×c.

[0090] Step 7: Return to step 1 and continuously update △T, so that the latest △T is used as the transmission time advance before the current vehicle network device node A sends data next time.

[0091] Optionally, discretization is performed using 16Ts as the first discretization unit ΔT, and the discretization result is placed in PSCCH. Specifically, it is marked in the Reserved field (target protocol reserved field) of SCI Format1. For example, if 32Ts > ΔT ≥ 16Ts, then ΔT = 16Ts is taken, and 4 bits (preset number of bytes) are selected in the Reserved field and marked 0001. If 48Ts > ΔT ≥ 32Ts, then ΔT = 32Ts is taken, and 4 bits are selected in the Reserved field and marked 0010, and so on.

[0092] Optionally, in the content transmitted in the SL-SCH channel (second transmission channel), a new MAC CE (Media Access Control Unit) is defined. The LCID index of this MAC CE has a value range (equivalent to the area identifier index range) of 10101-11011 (binary). Then, the transmission time parameter in the MAC CE is designed. Specifically, the ΔT calculated in step 7 is discretized and quantized with 1Ts as the second discretization unit, and the obtained value is used as the transmission time parameter of the MAC CE.

[0093] When neighboring vehicular network device node B, acting as the data receiver, receives the MAC CE of the ASL-SCH channel from the current vehicular network device node A, or a predefined field in SCI Format1 of the PSCCH, it can determine ΔT based on the MAC CE or the predefined field in SCI Format1, and then combine it with the data timing deviation ΔT of the current frame. PSCCH(Timing deviation data to be superimposed) allows for a more accurate estimation of the timing deviation △T+△T between the current vehicle network device node A and its neighboring vehicle network device node B. PSCCH This timeframe is then used as a lead time when sending unicast data to the current vehicle network device node A, providing a more accurate transmission time for communication between the two nodes and further extending the transmission distance during communication between the two nodes.

[0094] This solution uses timing deviation as a lead factor in transmission, ensuring that remote vehicle network device nodes retain valid data with a higher probability when removing CP intercepted data, thus guaranteeing correct decoding. Furthermore, by exchanging information carrying timing deviation values, it more accurately matches point-to-point transmission distances, further improving point-to-point communication distance.

[0095] The technical solution of this invention obtains the synchronization signal configuration parameters of the current vehicle-to-everything (V2X) device node and its neighboring V2X device nodes. Based on these parameters, it enables the transmission of synchronization signals from both the current V2X device node and its neighboring V2X device nodes. This allows it to obtain the target synchronization signal transmitted by the neighboring V2X device nodes. Furthermore, based on the target synchronization signal, it determines a timing deviation dataset. Then, based on the timing deviation dataset and the current data transmission method of the current V2X device node, it determines the target timing deviation data. Finally, based on the target timing deviation data, it updates the pre-transmission time of the data to be transmitted by the current V2X device node. Finally, based on the pre-transmission time and the current data transmission method, it transmits the data to be transmitted by the current V2X device node. The target timing deviation data in this solution reflects the timing deviation between neighboring vehicle network device nodes and the current vehicle network device node. By using the advance transmission time of the target timing deviation data update to send the data to be sent, the data to be sent can be sent in advance. This not only improves the communication range but also avoids the problem of vehicle network data decoding errors caused by long-distance transmission to a certain extent. It solves the problems of limited transmission distance extension and effective data decoding errors in long-distance data transmission in existing technologies. It can improve the transmission distance between vehicles and expand the communication coverage while ensuring the correct decoding of vehicle network data.

[0096] Example 3

[0097] Figure 4 This is a schematic diagram of a data transmission device provided in Embodiment 3 of the present invention. Figure 4 As shown, the device includes: a synchronization signal acquisition module 310, a target timing deviation data determination module 320, a pre-transmission time update module 330, and a data transmission module 340, wherein...

[0098] The synchronization signal acquisition module 310 is used to acquire the target synchronization signal sent by the neighboring vehicle network device nodes of the current vehicle network device node;

[0099] The target timing deviation data determination module 320 is used to determine the timing deviation dataset based on the target synchronization signal, and to determine the target timing deviation data based on the timing deviation dataset and the current data transmission method of the current vehicle network device node.

[0100] The pre-transmission time update module 330 is used to update the pre-transmission time of the data to be transmitted of the current vehicle network device node according to the target timing deviation data;

[0101] The data transmission module 340 is used to transmit the data to be transmitted from the current vehicle network device node according to the previous transmission time and the current data transmission method.

[0102] The technical solution of this invention obtains the target synchronization signal sent by the neighboring vehicle-to-everything (V2X) device nodes of the current V2X device node, then determines the timing deviation dataset based on the target synchronization signal, and determines the target timing deviation data based on the timing deviation dataset and the current data transmission method of the current V2X device node. Based on the target timing deviation data, the pre-transmission time of the data to be transmitted by the current V2X device node is updated, and the data to be transmitted by the current V2X device node is transmitted based on the pre-transmission time and the current data transmission method. The target timing deviation data in this solution reflects the timing deviation between the neighboring V2X device nodes and the current V2X device node. Using the updated pre-transmission time based on the target timing deviation data to transmit the data to be transmitted enables the data to be transmitted in advance. This not only expands the communication range but also, to a certain extent, avoids the problem of V2X data decoding errors caused by long-distance transmission. It solves the problems of limited transmission distance extension and effective data decoding errors in long-distance data transmission in existing technologies, and can improve the transmission distance between vehicles and expand the communication coverage while ensuring correct decoding of V2X data.

[0103] Optionally, the data transmission device includes a synchronization signal transmission enabling module, used to acquire the synchronization signal configuration parameters of the current vehicle-to-everything (V2X) device node and its neighboring V2X device nodes; and to enable the synchronization signal transmission function of the current V2X device node and its neighboring V2X device nodes according to the synchronization signal configuration parameters.

[0104] Optionally, the target timing deviation data determination module 320 is used to determine the discretized original data in the timing deviation dataset; obtain a first discrete quantization unit, and determine a target discrete interval that matches the discretized original data based on the first discrete quantization unit; and use the lower limit of the target discrete interval as the target timing deviation data.

[0105] Optionally, the target timing deviation data determination module 320 is used to obtain a second discretization unit; and determine the target timing deviation data based on the second discretization unit and the original discretization data.

[0106] Optionally, the pre-transmission time update module 330 is used to obtain the target protocol reserved field in the first transmission channel and determine the target parameter field in the target protocol reserved field that configures the target timing deviation data; determine the target configuration parameter of the target parameter field according to the target timing deviation data and a preset number of bytes; and update the pre-transmission time of the data to be transmitted of the current vehicle network device node according to the target configuration parameter.

[0107] Optionally, the pre-transmission time update module 330 is used to configure the media access control unit of the second transmission channel; determine the transmission time parameter in the media access control unit according to the area identifier index range of the media access control unit and the target timing deviation data; and update the pre-transmission time of the data to be transmitted of the current vehicle network device node according to the transmission time parameter.

[0108] Optionally, the data transmission device includes a data receiving vehicle-to-everything (V2X) device node transmission time adjustment module, used to acquire, when the current data transmission mode of the current V2X device node is broadcast, the timing deviation data to be superimposed between the data receiving V2X device node and the current V2X device node; and to determine the timing deviation data to be processed for unicast between the data receiving V2X device node and the current V2X device node based on the discretized original data and the timing deviation data to be superimposed, so as to update the advance transmission time of the data receiving V2X device node based on the timing deviation data to be processed.

[0109] The data transmission device provided in the embodiments of the present invention can execute the data transmission method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of executing the method.

[0110] Example 4

[0111] Figure 5A schematic diagram of an electronic device that can be used to implement embodiments of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0112] like Figure 5 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 may also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0113] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0114] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as data transmission methods.

[0115] In some embodiments, the data transmission method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the data transmission method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the data transmission method by any other suitable means (e.g., by means of firmware).

[0116] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0117] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0118] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0119] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0120] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0121] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0122] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0123] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A data transmission method, characterized in that, include: Obtain the target synchronization signal sent by the neighboring vehicle network device nodes of the current vehicle network device node; Based on the target synchronization signal, determine the timing deviation dataset, and based on the timing deviation dataset, determine the target timing deviation data; Based on the target timing deviation data, update the pre-transmission time of the data to be sent for the current vehicle network device node; Based on the aforementioned pre-send time and the current data transmission method, send the data to be sent from the current vehicle network device node; After sending the data to be sent by the current vehicle network device node according to the pre-send time and the current data transmission method, the method further includes: When the current data transmission mode of the current vehicle network device node is broadcast mode, the timing deviation data to be superimposed between the data receiving vehicle network device node and the current vehicle network device node is obtained; Based on the target timing deviation data and the timing deviation data to be superimposed, determine the timing deviation data to be processed for the unicast between the data receiving vehicle network device node and the current vehicle network device node, so as to update the pre-transmission time of the data receiving vehicle network device node according to the timing deviation data to be processed. Determining target timing deviation data based on the timing deviation dataset includes: determining the discretized original data in the timing deviation dataset; obtaining a first discrete quantization unit, and determining a target discrete interval matching the discretized original data based on the first discrete quantization unit; and using the lower limit of the target discrete interval as the target timing deviation data.

2. The method according to claim 1, characterized in that, Before obtaining the target synchronization signal sent by the neighboring vehicle-to-everything (V2X) device nodes of the current V2X device node, the following steps are included: Obtain the synchronization signal configuration parameters of the current vehicle network device node and its neighboring vehicle network device nodes; Based on the synchronization signal configuration parameters, enable the synchronization signal transmission function of the current vehicle network device node and its neighboring vehicle network device nodes.

3. The method according to claim 1, characterized in that, Determining the target timing deviation data based on the timing deviation dataset includes: Obtain the second discretization unit; The target timing deviation data is determined based on the second discretization unit and the original discretization data.

4. The method according to claim 1, characterized in that, The step of updating the pre-transmission time of the data to be transmitted for the current vehicle network device node based on the target timing deviation data includes: Obtain the target protocol reserved field in the first transmission channel, and determine the target parameter field in the target protocol reserved field that configures the target timing deviation data; Based on the target timing deviation data and the preset number of bytes, determine the target configuration parameters of the target parameter field; Based on the target configuration parameters, update the pre-send time of the data to be sent for the current vehicle network device node.

5. The method according to claim 3, characterized in that, The step of updating the pre-transmission time of the data to be transmitted for the current vehicle network device node based on the target timing deviation data includes: A media access control unit configured with a second transmission channel; The transmission time parameter in the media access control unit is determined based on the area identifier index range of the media access control unit and the target timing deviation data. Based on the transmission time parameter, update the pre-transmission time of the data to be transmitted for the current vehicle network device node.

6. A data transmission device, characterized in that, include: The synchronization signal acquisition module is used to acquire the target synchronization signal sent by the neighboring vehicle network device nodes of the current vehicle network device node; The target timing deviation data determination module is used to determine the timing deviation dataset based on the target synchronization signal, and to determine the target timing deviation data based on the timing deviation dataset and the current data transmission method of the current vehicle network device node. The pre-transmission time update module is used to update the pre-transmission time of the data to be transmitted of the current vehicle network device node according to the target timing deviation data; The data transmission module is used to transmit the data to be transmitted by the current vehicle network device node according to the pre-transmission time and the current data transmission method; The data receiving vehicle-to-everything (V2X) device node transmission time adjustment module is used to, when the current data transmission mode of the current V2X device node is broadcast, acquire the timing deviation data to be superimposed between the data receiving V2X device node and the current V2X device node; determine the timing deviation data to be processed for unicast between the data receiving V2X device node and the current V2X device node based on the target timing deviation data and the timing deviation data to be superimposed, so as to update the advance transmission time of the data receiving V2X device node based on the timing deviation data to be processed; The target timing deviation data determination module is used to determine the discretized original data in the timing deviation dataset; obtain a first discrete quantization unit, and determine a target discrete interval that matches the discretized original data based on the first discrete quantization unit; The lower limit of the target discrete interval is used as the target timing deviation data.

7. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the data transmission method according to any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that cause a processor to execute the data transmission method according to any one of claims 1-5.

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