WO2014075548A1 - Method and device for data broadcast control and data broadcast in vehicle network - Google Patents

Abstract

A method and device for data broadcast control and data broadcast in a vehicle network, relating to wireless communication field, is used to resolve the problem how to jointly transmitting data packets by multiple Road Side Units (RSU) in the vehicle network. In the present invention, after a control device divides the data to be sent into multiple data blocks, the control device sends the divided multiple data blocks to each RSU which covers the current lane. The control device generates a RSU allocation scheme of multiple data blocks according to the number of the data blocks that each RSU can broadcast. The control device sends a control command to the RSU to which the data blocks are allocated according to the RSU allocation scheme, so as to indicate the data blocks which are needed to be broadcast by the RSU. The RSU broadcasts the data blocks indicated by the control command to an On-Board Unit (OBU). The present invention solves the problem that how to jointly transmitting data packets by multiple RSUs in the vehicle network.

Description

 Data broadcasting control and data broadcasting method and device in the vehicle network This application claims to be submitted to the Chinese Patent Office on November 15, 2012, the application number is 201210461231.3, and the invention name is "data broadcasting control and data broadcasting method and equipment in the vehicle network" The priority of the Chinese Patent Application, the entire contents of which is incorporated herein by reference. Technical field

 The present invention relates to the field of wireless communications, and in particular, to a data broadcast control and data broadcast method and apparatus in a vehicle network. Background technique

 The United States and Europe have been researching the Internet of Vehicles technology in the field of intelligent transportation for many years. The main application of vehicle networking technology is to reduce the occurrence of traffic accidents. In the car networking system, the On-Board Unit (OBU) on the vehicle monitors the location and driving information of the vehicle and broadcasts the information to surrounding vehicles, while the vehicle will also receive information transmitted by other vehicles. The OBU will analyze the driving information of the vehicle and other vehicles and notify the driver of possible traffic threats.

 In order to avoid receiving false or malicious broadcast information, the information sent by the OBU must contain authentication information. The current authentication mechanism is based on the Public Key Infrastructure (PKI) public key certificate authentication mechanism, which involves the management of the Certificate Revocation List (CRL). In order to ensure the normal operation of the vehicle network system authentication mechanism, the CRL must be transmitted to the OBU in the vehicle in time. In addition, people will also use the car networking system to provide users with various value-added services, such as traffic information, weather information, advertising information, etc., which are transmitted to the OBU through the air interface.

There are currently two methods of data transmission that can be considered: One is to download the OBU in the vehicle through the wireless network of the telecommunications. This method requires that the corresponding communication module must be installed in the OBU and the related services must be activated; The relevant information is sent to the nearby OBU via the Road Side Unit (RSU). Transferring data over a telecommunications network is a one-to-one download method, using existing The wireless network technology can be realized; the data transmission through the RSU is a one-to-many broadcast method. Considering the mobility of the vehicle and the coverage of a single RSU antenna, it is possible that a single RSU may not be able to complete the transmission of some large data packets, which requires multiple RSUs to cooperate to complete the transmission of large data packets.

 In the Internet of Vehicles system, OBU-OBU and OBU-RSU communication use Dedicated Short Range Communication (DSC) technology. The RSU broadcasts a variety of information, such as traffic information, local service information, and management information, to the OBU installed on the vehicle. Most of the information is short and can be broadcast by a single RSU in one or more frames. However, there may be some information that is large in length, such as a certificate revocation list, which cannot be broadcast by a single RSU for a limited time. In this case, it must be relayed by multiple RSUs to complete.

 The Internet of Vehicles technology is still in the development stage of research and related standards, and many issues have not yet received attention. So far, the relevant technical standards have not involved the technical solution of how to jointly send large data packets through RSU, and no related research work has been found to discuss this topic.

 In summary, in the prior art, how multiple RSUs jointly send data packets has no specific implementation. Summary of the invention

 Embodiments of the present invention provide a data broadcast control and data broadcast method and device in a vehicle network, which are used to solve the problem of how multiple RSUs in a car network jointly send data packets.

 A data broadcast control method in a vehicle network, the method comprising:

 The control device divides the data to be transmitted into a plurality of data blocks according to a preset data frame size, and sends the divided plurality of data blocks to each roadside device RSU covering the current lane;

 The control device determines the number of data blocks that each RSU can broadcast according to the highest vehicle speed in the current lane, and generates an RSU allocation scheme of the multiple data blocks according to the determination result;

 The control device sends a control command to the RSU to which the data block is allocated according to the RSU allocation scheme, where the control command is used to indicate a data block that needs to be broadcast by the RSU of the allocated data block.

 A data distribution method in a vehicle network, the method comprising:

The roadside device RSU receives the data block delivered by the control device, where the data block is multiple, Data blocks are obtained by dividing the data to be sent;

 The RSU receives a control command that is sent by the control device, where the control command indicates a data block that needs to be broadcasted by the RSU, and the data block that needs to be broadcasted is a data block in the multiple data blocks; The indication of the control command broadcasts a data block to the in-vehicle device OBU.

 A control device, the device comprising:

 a data block sending unit, configured to divide the data to be transmitted into a plurality of data blocks according to a preset data frame size, and send the divided plurality of data blocks to each roadside device RSU covering the current lane;

 An allocation scheme generating unit, configured to determine, according to a maximum vehicle speed in the current lane, a number of data blocks that can be broadcasted by each RSU, and generate an RSU allocation scheme of the plurality of data blocks according to the determination result; and a control instruction sending unit, configured to The RSU allocation scheme sends a control command to the RSU to which the data block is allocated to indicate the data block that the RSU needs to broadcast.

 A roadside equipment RSU, the equipment includes:

 a data block receiving unit, configured to receive a plurality of data blocks that are sent by the control device and are divided by the data to be sent;

 a control instruction receiving unit, configured to receive a control instruction issued by the control device, where the control instruction indicates a data block that needs to be broadcast by the RSU;

 And a data block advertisement unit, configured to broadcast the data block to the in-vehicle device OBU according to the indication of the control instruction.

 A control device comprising:

a processor, configured to divide the data to be sent into multiple data blocks according to a preset data frame size, and send the plurality of data blocks divided by the processor to each path covering the current lane by using a transceiver An edge device RSU; and, determining, according to a maximum vehicle speed in the current lane, a number of data blocks that can be advertised by each of the RSUs, and generating an RSU allocation scheme of the plurality of data blocks according to the determination result, and according to the RSU allocation scheme And transmitting, by the transceiver, a control instruction to the RSU to which the data block is allocated, where the control instruction is used to indicate a data block that needs to be broadcast by the RSU of the allocated data block; The transceiver is configured to send the plurality of data blocks that are divided by the processor to each RSU that covers the current lane; and send a control instruction to the RSU that is allocated the data block.

 A roadside equipment RSU, including:

 a transceiver, configured to receive a data block and a control command sent by the control device, where the data block is multiple, the plurality of data blocks are obtained by dividing the data to be sent, and the control instruction is used to indicate the RSU a data block to be advertised, where the data block to be advertised is a data block in the plurality of data blocks;

 And a processor, configured to broadcast, by the transceiver, a data block to the in-vehicle device OBU according to the indication of the control instruction received by the transceiver.

 In the solution provided by the embodiment of the present invention, after the control device divides the data to be transmitted into multiple data blocks, the divided multiple data blocks are sent to each RSU covering the current lane, and according to the data blocks that can be broadcast by each RSU. The RSU allocation scheme for generating a plurality of data blocks, and issuing a control instruction to the RSU of the allocated data block according to the RSU allocation scheme to indicate the data block that the RSU needs to broadcast, and the RSU broadcasts the data indicated by the control instruction to the OBU. Piece. It can be seen that the method implements a scheme in which multiple RSUs jointly broadcast multiple data blocks of data to be sent, thereby solving the problem of how multiple RSUs in the vehicle network jointly send data packets. DRAWINGS

 In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following drawings will be briefly described in the description of the embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying creative labor.

 1 is a schematic diagram of a system architecture of a multi-RSU joint broadcast data packet in a vehicle network according to an embodiment of the present invention;

 2 is a schematic flowchart of a method according to an embodiment of the present invention;

 3 is a schematic flowchart of another method according to an embodiment of the present invention;

4a is a schematic diagram of a multi-RSU joint static broadcast data packet in a vehicle network according to Embodiment 1 of the present invention; Schematic diagram

 4b is a schematic diagram of a principle of multiple RSU joint dynamic broadcast data packets in a vehicle network according to Embodiment 2 of the present invention;

 4c is a schematic diagram of a two-way lane in Embodiment 3 of the present invention;

 4d is a schematic flowchart of a method in Embodiment 3 of the present invention;

 FIG. 5 is a schematic structural diagram of a control device according to an embodiment of the present disclosure;

 FIG. 6 is a schematic structural diagram of an RSU according to an embodiment of the present disclosure;

 FIG. 7 is a schematic structural diagram of a control device according to another embodiment of the present invention;

 FIG. 8 is a schematic structural diagram of an RSU according to another embodiment of the present invention. detailed description

 In order to solve the problem of how multiple RSUs in a car network jointly send data packets, embodiments of the present invention provide a data broadcast control method in a car network and a data broadcast method in a car network. As shown in FIG. 1 , it is a schematic diagram of a system architecture applied by a method provided by an embodiment of the present invention, where the system includes:

 The control device is configured to manage and transmit data required to be broadcast by the roadside device; generate and transmit control commands to the roadside device; and receive data uploaded by the roadside device;

 a roadside equipment (RSU) for receiving data and instructions transmitted by the control device; broadcasting data to the in-vehicle device; receiving information broadcast by the in-vehicle device; and reporting various information to the control device;

 In-vehicle equipment (OBU), used to broadcast the driving information of the vehicle in real time; receive information broadcasted by other in-vehicle equipment and roadside equipment.

 Specifically, the control device is configured to: divide the data to be sent into multiple data blocks according to a preset data frame size, and send the divided multiple data blocks to each RSU covering the current lane; according to the current lane The maximum vehicle speed determines the number of data blocks that can be advertised by each RSU, and generates an RSU allocation scheme of the plurality of data blocks according to the determination result, and sends a control instruction to the RSU of the allocated data block according to the RSU allocation scheme to indicate that the RSU needs to be broadcasted. Data block

The RSU is configured to: receive multiple data blocks that are sent by the control device and are divided by the data to be sent; Receiving a control command sent by the control device, and broadcasting the data block to the OBU according to the instruction of the control instruction. The OBU is used to: receive data blocks advertised by each RSU, and combine the received data blocks into complete data.

 Referring to FIG. 2, the data broadcast control method in the vehicle networking of the embodiment of the present invention includes the following steps: Step 20: The control device divides the data to be sent into multiple data blocks according to a preset data frame size, and divides the data into blocks. Multiple data blocks are sent to each RSU covering the current lane;

 Step 21: The control device determines the number of data blocks that each RSU can broadcast according to the highest vehicle speed in the current lane, and generates an RSU allocation scheme of multiple data blocks according to the determination result;

 Step 22: The control device sends a control command to the RSU to which the data block is allocated according to the SU allocation scheme to indicate the data block that the RSU needs to broadcast.

 Specifically, in step 20, the control device divides the data to be sent into multiple data blocks according to the data frame size, and the specific implementation may be as follows:

 The control device divides the data to be sent into N data blocks, where N is an integer greater than 1, wherein the size from the 1st to the N-1th data block is equal to a preset data frame size, and the Nth data The size of the block is equal to or smaller than the data frame size.

 In step 21, the control device determines the number of data blocks that each RSU can broadcast according to the highest speed in the current lane. The specific implementation may be as follows:

 The control device determines the number of data blocks that the first RSU can advertise according to the following formula: M, i is an integer not less than 1, and the maximum value of i is the total number of RSUs in the current lane:

 Ni = (Di / Vmax) / T;

 Where Di is the coverage distance of the first RSU, Vmax is the highest speed in the current lane, T is the time required to broadcast a data frame, and T = data frame size / RSU data transmission rate.

 In step 21, an RSU allocation scheme for generating multiple data blocks according to the determination result may be implemented as follows:

 Α, determine that the total number of RSUs in the current lane is η, and the direction of travel of the current lane is from RSU1 to RSUn;

B. If the number of unallocated data blocks in multiple data blocks is not less than a, multiple data blocks are used. The first a data blocks that are not allocated are allocated to RSUj. Otherwise, all unallocated data blocks are allocated to RSUj; the initial value of j is 1, and a is the number of data blocks that RSUj can broadcast;

 C. If the unallocated data block in multiple data blocks is not 0, add j to 1 and return to step B. In step 22, the control device sends a control command to the RSU to which the data block is allocated according to the RSU allocation scheme to indicate the data block to be broadcast by the RSU. The specific implementation may be as follows:

 The control device sends the control signaling carrying the start data block identifier and the termination data block identifier to the RSU to which the data block is allocated according to the RSU allocation scheme; where the start data block identifier indicates the first data block that the RSU needs to broadcast, The terminating block identifier indicates the last block of data that the RSU needs to advertise.

 Preferably, the control signaling further carries at least one of the following information:

 The information identifier is an identifier of the plurality of data blocks, and is used to indicate that the data block that needs to be broadcasted is in the multiple data blocks, that is, the information identifier is used to identify information (such as a data file) that needs to be broadcasted, and the information needs to be broadcasted. The information contains multiple data blocks. The RSU may learn to find the starting data block and the ending data block that need to be broadcasted in the multiple data blocks (such as data files) according to the information identifier and the starting data block identifier and the terminating data block identifier.

 a lane identifier for identifying a current lane, and the RSU may determine, according to the information, a lane to which the broadcasted data block is applied;

 The advertisement start time is used to indicate the start time of the broadcast data block, and the RSU can determine the start time point of the data block to be broadcast to the OBU according to the information;

 The broadcast end time is used to indicate the end time of the broadcast data block, and the RSU can determine the end time point of the data block to be broadcast to the OBU according to the information.

Specifically, the maximum vehicle speed in the current lane may be a preset maximum vehicle speed, and the maximum vehicle speed is a fixed value; or, the control device may dynamically determine the maximum vehicle speed in the current lane according to the following method: the control device receives the report reported by each RSU. Traffic information report, each traffic information report carries the maximum travel speed of the vehicle within the coverage of the corresponding RSU; and selects the maximum value of the maximum travel speed of the vehicle in each received traffic information report as the highest speed in the current lane. Here, the RSU can periodically report the traffic information report, and the control device receives the traffic information report in one cycle. After that, according to the maximum travel speed of the vehicle carried in each traffic information received in the cycle, the maximum speed in the current lane is determined, and then step 21-step 22 is performed according to the determined maximum vehicle speed; and received in the next cycle. After the traffic information report, according to the maximum travel speed of the vehicle carried in each traffic information report received in the cycle, the maximum speed in the current lane is re-determined, and then steps 21-22 are performed again according to the re-determined maximum vehicle speed, thereby realizing A multi-RSU joint dynamic broadcast data scheme.

 Referring to FIG. 3, the data distribution method in the vehicle networking provided by the embodiment of the present invention includes the following steps: Step 30: The RSU receives a plurality of data blocks that are sent by the control device and are divided by the data to be sent; Step 31: The RSU receives the control device. a control command issued, the control instruction indicating a data block to be broadcast by the RSU;

 Step 32: The RSU broadcasts a data block to the OBU according to the instruction of the control instruction.

 Specifically, the control command received by the RSU in step 31 carries the control signaling of the start data block identifier and the termination data block identifier; wherein, the start data block identifier indicates the first data block that the RSU needs to broadcast, and the data is terminated. The block identifier indicates the last data block that the RSU needs to broadcast; correspondingly, in step 32, the RSU broadcasts the data block to the OBU according to the instruction of the control instruction, and the specific implementation can be:

 The SU searches for the start data block corresponding to the start data block identifier and the termination data block corresponding to the end data block identifier in the plurality of data blocks received in step 30; and broadcasts from the start data block to the OBU to the OBU The data block of the terminating data block.

 Preferably, the control signaling received by the RSU further carries at least one of the following information: the information identifier is an identifier of the plurality of data blocks, and is used to indicate that the data block that needs to be broadcasted is in the multiple data blocks. That is, the information identifier is used to identify information that needs to be broadcasted (such as a data file), and the information that needs to be broadcasted includes multiple data blocks. The RSU may learn to find the starting data block and the ending data block that need to be broadcasted in the multiple data blocks (such as data files) according to the information identifier and the starting data block identifier and the terminating data block identifier.

a lane identifier for identifying a current lane, and the RSU may determine, according to the information, a lane to which the broadcasted data block is applied; The advertisement start time is used to indicate the start time of the broadcast data block, and the RSU can determine the start time point of the data block to be broadcast to the OBU according to the information;

 The broadcast end time is used to indicate the end time of the broadcast data block, and the RSU can determine the end time point of the data block to be broadcast to the OBU according to the information.

 Preferably, if the RSU receives a plurality of control commands for different lanes in which the broadcast time period overlaps, the RSU alternately broadcasts the data blocks indicated by the plurality of control commands in a time division manner during the overlapping time period. For details, refer to the embodiment. The description of Figure 4d in the middle.

 Preferably, in order to implement the multi-RSU joint dynamic broadcast data scheme, the RSU needs to monitor the traveling speed information of the vehicle broadcasted by the OBU, and report the traffic information report to the control device according to the monitored information according to the preset time interval, the traffic information report. The maximum travel speed of the vehicle within the coverage of the RSU is carried.

 The present invention will be described below in conjunction with specific embodiments:

 Embodiment 1:

 In this embodiment, a multi-RSU joint static broadcast data is implemented. In this solution, the control device pre-sets the broadcast plan and delivers it to each RSU. The principle is shown in Figure 4a. The handling of multiple RSU joint static broadcast data for a single lane in the Internet of Vehicles is:

 The control device needs to broadcast the information F to the OBU; the control device divides the data to be sent into N data blocks according to the data frame size Smax, and the last data block may be smaller than Smax; the control device divides the data block set F[1, N] Send to RSU.

 The control device calculates the number of data blocks that each RSU can broadcast according to the maximum vehicle speed Vmax allowed in the current lane r: the driving direction of the vehicle is from RSU1 to RSUn; the coverage distances of RSU1, RSU2, RSUn are respectively D1, D2, Dn; The time required for the RSU to advertise a data frame when the data frame size is Smax is T; the number of data blocks that can be advertised by each RSU at the time Vmax required to broadcast a data frame is Ni=(Di/Vmax)/T;

The control device sequentially allocates N blocks of data from the first block to RSU1, RSU2, ..., RSUk, and RSUk as the last RSU participating in the transmission; the control device generates a corresponding control instruction according to the RSU data block distribution allocation scheme, And send the corresponding control commands to each RSU. Master of control instructions The content is six-tuple [F, R, Ns, Ne, Ts, Te], where F is the information identifier (such as data file identifier), R is the lane identifier, Ns is the starting data block identifier, and Ne is the termination data block. Identification, Ts is the broadcast start time, and Te is the broadcast end time.

 The RSU cyclically broadcasts the data block in the interval [Ns, Ne] in the specified time [Ts, Te] according to the broadcast command of the control device.

 The OBU receives the information blocks advertised by each RSU and combines the received data blocks into complete data after leaving the entire broadcast area.

 Examples are as follows:

 Step 1: The size of the data to be sent is =2048 KB, and the data frame size is Smax=0.5 KB, and the data to be transmitted needs to be divided into N=2048/0.5=4096 blocks; the control device sends the divided data blocks to each RSU.

 Step 2: The maximum speed allowed in the current lane r is Vmax=100km, and the driving direction of the vehicle is RSU1, RSU2, ..., SUn; where the coverage distance of RSU1 is 400m, and the coverage distance of other RSUs is 500m; at Smax=0.5 In the case of KB, the time required for the RSU to broadcast one frame is 0.025 s, and the number of data blocks that can be advertised by each RSU is:

 SU1 is (400/(100,000/3600))/0.025=576,

 SU2, RSU3, ..., SUn are both (500/(100,000/3600))/0.025=720.

 At the broadcast start time Ts=2012.10.01 00:00:00, the end time Te=2012.10.02 23:59:59 In the case, the control commands generated by the control device for each RSU are:

 RSU1 [f, r, 1, 576, 2012.10.01 00:00:00, 2012.10.02 23:59:59]

 RSU2 [f, r, 577, 1296, 2012.10.01 00:00:00, 2012.10.02 23:59:59]

 SU3 [f, r, 1297, 2016, 2012.10.01 00:00:00, 2012.10.02 23:59:59]

 SU4 [f, r, 2017, 2736, 2012.10.01 00:00:00, 2012.10.02 23:59:59]

 SU5 [f, r, 2737, 3456, 2012.10.01 00:00:00, 2012.10.02 23:59:59]

 SU6 [f, r, 3457, 4096, 2012.10.01 00:00:00, 2012.10.02 23:59:59] The control device sends the generated control commands to the corresponding RSU;

Step 3: The RSU cyclically broadcasts the designation within a specified time according to the control command sent by the control device. Data block.

 Step 4: The OBU receives the data blocks advertised by each RSU. After passing through RSU6, the received 4096 data blocks are combined into one complete data.

 Preferably, the lane covered by the RSU is multi-lane and the direction of travel is different. Because the RSUs are in a sequential relationship when the multiple RSUs jointly broadcast information, on the basis of the first embodiment, the direction of the lane needs to be considered when broadcasting the information. .

 Embodiment 2:

 In this embodiment, a multi-RSU joint dynamic broadcast data scheme is implemented. In this solution, the broadcast scheme can be dynamically adjusted according to the actual situation of the road traffic, and the principle thereof is shown in FIG. 4b. The multi-RSU joint dynamic broadcast data processing for the bicycle lane in the Internet of Vehicles is handled as follows:

 The control device needs to broadcast the information F to the OBU; the control device divides the data to be sent into N data blocks according to the data frame size Smax, and the last data block may be smaller than Smax; the control device divides the data block set F[1, N] Send to RSU.

 The OBU on the road continuously broadcasts its position and driving information at regular intervals, such as the current position, speed, direction of travel, and so on.

 The SU monitors the information broadcasted by the OBU within the coverage of the antenna, and generates a traffic information report at a predetermined time interval. The traffic information report contains a triplet [t, r, v], t is the report generation time, and r is the lane. Mark, V is the effective maximum travel speed of the vehicle (excluding the situation of overspeed travel, etc.); The RSU reports the generated traffic information report to the control device.

 The control device obtains the maximum vehicle speed Vmax=MAX(vl, v2, ..., vn) of the link r at time t according to the triplet [t, r, v] reported by the RSU.

 The control device calculates the number of data blocks that each RSU can broadcast according to the maximum vehicle speed Vmax in the lane r: The driving direction of the vehicle is from RSU1 to RSUn; the coverage distances of SU1, RSU2, ..., SUn are respectively D1, D2, Dn The time required for the RSU to broadcast a data frame when the data frame size is Smax is T; the number of data blocks that each RSU can broadcast at the maximum vehicle speed Vmax is Ni=(Di/Vmax)/T;

The control device sequentially allocates N blocks of data from the first block to RSU1, SU2, ..., RSUk, RSUk is the last RSU participating in the transmission; the control device generates a corresponding control instruction according to the RSU data block distribution scheme, and sends a corresponding control instruction to each RSU. The main content of the control instruction is the six-tuple [F, R, Ns, Ne, Ts, Te], where F is the information identifier (such as data file;), R is the lane identifier, Ns is the starting data block identifier, Ne is The data block identifier is terminated, Ts is the broadcast start time, and Te is the broadcast end time.

 The RSU cyclically broadcasts the data block in the interval [Ns, Ne] in the specified time [Ts, Te] according to the broadcast command of the control device.

 The OBU receives the data blocks advertised by each RSU and combines the received data blocks into complete data after leaving the entire broadcast area.

 Examples are as follows:

 Step 1: The size of the data to be sent is =2048 KB, and the data frame size is Smax=0.5 KB, and the data to be transmitted needs to be divided into N=2048/0.5=4096 blocks; the control device sends the divided data blocks to each RSU.

 Step 2: The OBU on the road broadcasts its driving information.

 The RSU in the lane r monitors the travel information of the OBU broadcasted in the antenna coverage area, and collects the real-time speed sent by the OBU on the road at the specified time point 2012.10.01 07:00:00; the SU report is collected at the time point. The highest non-overspeed speed, such as RSU1 reported data [2012.10.01 07:00:00, r, 45].

 Step 3: The control device obtains the maximum speed of the lane r at 2012.10.01 07:00:00 according to the speed data reported by the RSU. Vmax=MAX(45, 50, 30)=50km.

 The maximum speed in the lane r is Vmax=50km, and the direction of the vehicle history is RSU1, RSU2, ..., RSUn; where the coverage distance of RSU1 is 400m, and the coverage distance of other RSUs is 500m; in the case of Smax=0.5KB The time required for the RSU to broadcast one data frame is 0.025s, and the number of data blocks that each RSU can broadcast is:

 RSU1 is (400/(50,000/3600))/0.025=1152;

 SU2, RSU3, ..., SUn are both (500/(50,000/3600)) Ζ0.025=1440.

At the broadcast start time Ts=2012.10.01 00:00:00, the end time Te=2012.10.02 23:59:59 In the case, the control commands generated by the control device for each RSU are:

 SU1 [f, r, 1, 1152, 2012.10.01 07:00:00, 2012.10.01 07:59:59]

 SU2 [f, r, 1153, 2592, 2012.10.01 07:00:00, 2012.10.01 07:59:59]

 SU3 [f, r, 2593, 4032, 2012.10.01 07:00:00, 2012.10.01 07:59:59]

 SU4 [f, r, 4033, 4096, 2012.10.01 07:00:00, 2012.10.01 07:59:59]

 The control device sends the generated control commands to the corresponding RSUs respectively;

 Step 4: The RSU cyclically broadcasts the specified data block within a given time according to the control command sent by the control device.

 Step 5: The OBU receives the data blocks advertised by each RSU. After passing through RSU6, the received 4096 data blocks are combined into one complete data.

 In step 3, the execution time of the control command sent by the control device is 1 hour. After the end, the control device can give a new control command according to the actual situation of the road, that is, the new speed information reported by the RSU.

 Preferably, the lane covered by the RSU is multi-lane and the direction of travel is different. Because the RSUs are in a sequential relationship when the multiple RSUs jointly broadcast information, on the basis of the second embodiment, the direction of the lane needs to be considered when broadcasting the information. .

 Embodiment 3:

An RSU covering a lane may be complicated, such as a one-way street with only one direction of travel, two-way roads with two directions of travel, four-way lanes at an intersection, and so on. The lane identification R in the control command six-tuple [F, R, Ns, Ne, Ts, Te] is established for handling multi-lane conditions. For example, the left and right lanes in the two-way lane must be separately identified, and the four lanes on the intersection need to be separately identified, and the other lanes are similar. Preferably, for multi-directional roads with different driving directions, since the RSUs have a sequential relationship when the multiple RSUs jointly broadcast information, the direction of travel of the lanes can be considered when broadcasting the information. As shown in Figure 4c, the order of the right lanes is from RSUa to RSU, and the order of the left lanes is from SU to RSUa. Also, because the driving conditions of vehicles in each lane may be completely different, the number of RSUs required to complete a joint broadcast in different lanes may also be different. In order to enable a single RSU to handle the problem of multi-lane information distribution, the scheme adopts a time division method to enable the RSU to alternately process the advertisement of multi-lane information. The basic principle of RSU multi-lane time-division broadcast information is: The control device needs to set different control commands for each lane independently, ie six-tuple [F, R, Ns, Ne, Ts, Te]; if there are more in the same time period When the bar control command satisfies the broadcast condition, the broadcast time is divided into k parts such as t1, t2, ..., tk according to the number of lanes satisfying the condition, and one frame of data can be transmitted in each time segment (ie, the length of each time segment) It is guaranteed to be able to play at least one frame of data); the RSU cyclically broadcasts information belonging to each lane in a frame-by-frame manner, that is, the RSU serves the lane R1 in the tl period, the lane R2 in the t2 period, and the lane Rk in the tk period. service.

 In a specific implementation, the RSU may determine the number of lanes that meet the broadcast condition within the broadcast period, and if the number of lanes satisfying the broadcast condition in the broadcast period is k, divide the broadcast period into k (k is greater than 1) Integer) time period, the length of each time segment is guaranteed to play at least one frame of data; then, the RSU plays the control command of the i-th (1 ik) lane in the k lanes in the ith time segment.

 The specific processing flow is shown in Figure 4d.

 The RSU manages a six-tuple [F, R, Ns, Ne, Ts, Te] instruction set (such as a table with 100 records) and has pointers to an instruction in the instruction set that initially points to the first Before the instruction. For each instruction, there is a pointer to a data block (the last advertised data block) in the to-be-advertised interval [Ns, Ne] corresponding to the instruction, and the pointer initially points to the first to be broadcasted interval [Ns, Ne] Before the data block. at this time:

 Step 1: The RSU gets the current time t.

 Step 2: The RSU moves the pointer to the next instruction. If it is the end of the table, go to step 5. Otherwise, determine if the instruction currently pointed by the pointer meets the condition: Ts<=t<=Te, if not, repeat step 2. After finding the instruction that meets the conditions, go to step 3.

 Step 3: For the instruction that satisfies the condition, move the pointer of the to-be-advertised interval [Ns, Ne] corresponding to the instruction to the next data block. If the next data block is not empty, go to step 4; otherwise, Step 6.

 Step 4: The RSU broadcasts the data block pointed to by the current pointer to the OBU, and returns to step 1.

Step 5: Before moving the pointer to the header, return to step 1; Step 6: Before moving the pointer of the to-be-advertised interval [Ns, Ne] corresponding to the instruction to the first data block of the to-be-advertised interval [Ns, Ne], return to step 3.

 When multi-lane information is broadcast in a time-division manner, the broadcast capacity on each lane will be correspondingly reduced. The control device uses the formula: M=((Di/Vmax)/T)/K to calculate the number of data blocks that each RSU can broadcast for each lane, where M is the number of data blocks that RSUi can broadcast for a single lane, Di is the coverage distance of RSUi, that is, the length of the covered road segment, and T is the time required for the RSU to broadcast a data frame, and K is the number of lanes.

 Referring to FIG. 5, an embodiment of the present invention provides a control device, where the device includes:

 a data block sending unit 50, configured to divide the data to be sent into a plurality of data blocks according to a preset data frame size, and send the divided plurality of data blocks to each roadside device RSU covering the current lane;

 The allocation scheme generating unit 51 is configured to determine, according to the highest vehicle speed in the current lane, the number of data blocks that can be broadcasted by each RSU, and generate an RSU allocation scheme of the plurality of data blocks according to the determination result; and a control instruction sending unit 52, configured to: And sending a control instruction to the RSU to which the data block is allocated according to the RSU allocation scheme, to indicate a data block that needs to be broadcast by the RSU.

 Further, the data block sending unit 50 is configured to: divide the data to be sent into multiple data blocks according to the following method:

 Dividing the data to be transmitted into N data blocks, where N is an integer greater than 1, wherein the size from the 1st to the N-1th data block is equal to a preset data frame size, and the Nth data block The size is equal to or less than the data frame size.

 Further, the allocation scheme generating unit 51 is configured to:

 Determine the number of data blocks that the i-th RSU can advertise according to the following formula: Ni, i is an integer not less than 1:

 Ni = (Di / Vmax) / T;

 Where Di is the coverage distance of the i-th RSU, Vmax is the highest speed in the current lane, and T is the time required to broadcast a data frame.

Further, the allocation scheme generating unit 51 is configured to: generate the multiple according to the following method RSU allocation scheme for data blocks:

 A. Determine that the total number of RSUs in the current lane is n, and the direction of travel of the current lane is from RSU1 to RSUn;

 B. If the number of unallocated data blocks in the plurality of data blocks is not less than a, assigning the first a data blocks that are not allocated in the plurality of data blocks to the RSUj, otherwise, all are not The allocated data block is allocated to RSUj; the initial value of j is 1, and a is the number of data blocks that RSUj can advertise;

C. If the unallocated data block of the plurality of data blocks is not 0, add j to 1 and return to step B.

 Further, the control command sending unit 52 is configured to:

 And transmitting, by the RSU allocation scheme, control signaling carrying a start data block identifier and a termination data block identifier to the RSU to which the data block is allocated;

 The starting data block identifier indicates a first data block that the RSU needs to advertise, and the terminating data block identifier indicates a last data block that the RSU needs to advertise.

 Further, the control signaling further includes at least one of the following information: an information identifier, used to identify information that needs to be broadcasted, where the information to be broadcasted includes multiple data blocks;

 Lane identification, used to identify the current lane;

 The advertisement start time, which is used to indicate the start time of the broadcast data block;

 The broadcast end time is used to indicate the end time of the broadcast data block.

 Further, the allocation scheme generating unit 51 is configured to:

 Determining the preset maximum speed as the highest speed in the current lane; or,

 Receiving the traffic information report reported by each RSU, each traffic information report carrying the maximum travel speed of the vehicle within the coverage of the corresponding RSU; selecting the maximum value of the maximum travel speed of the vehicle in each received traffic information report, as the highest in the current lane Speed.

 Referring to FIG. 6, an embodiment of the present invention provides a roadside device RSU, where the device includes:

a data block receiving unit 60, configured to receive a plurality of data blocks that are sent by the control device and are divided by the data to be sent; The control instruction receiving unit 61 is configured to receive a control instruction issued by the control device, where the control instruction indicates a data block that needs to be broadcast by the RSU;

 The data block advertisement unit 62 is configured to broadcast a data block to the in-vehicle device OBU according to the indication of the control instruction.

 Further, the control instruction carries a control signaling of a start data block identifier and a termination data block identifier, where the start data block identifier indicates a first data block that the RSU needs to broadcast, and the termination data block The identifier indicates the last data block that the RSU needs to advertise;

 The data block advertised unit 62 is configured to: search, in the plurality of data blocks, a start data block corresponding to the start data block identifier, and a termination data block corresponding to the end data block identifier; and broadcast the data to the OBU From the starting data block to the data block of the terminating data block.

 Further, the control signaling further includes at least one of the following information: an information identifier, used to identify information that needs to be broadcasted, where the information to be broadcasted includes multiple data blocks;

 Lane identification, used to identify the current lane;

 The advertisement start time, which is used to indicate the start time of the broadcast data block;

 The broadcast end time is used to indicate the end time of the broadcast data block.

 Further, the data block advertisement unit 62 is configured to:

 If the control command receiving unit receives a plurality of control commands for different lanes in which the broadcast time period overlaps, the RSU alternately broadcasts the data blocks indicated by the plurality of control commands in a time division manner in the overlapping time period.

 Further, the device further includes:

 The traffic report reporting unit 63 is configured to monitor the traveling speed information of the vehicle broadcasted by the OBU, and report the traffic information report to the control device according to the monitored information according to the preset time interval, where the traffic information report carries the vehicle within the coverage of the RSU. Maximum travel speed.

 Based on the same technical concept, the embodiment of the present invention further provides a control device applicable to the above process.

Referring to FIG. 7, the control device may include a transceiver 71, a processor 72, and may further include The reservoir 73, wherein:

 The processor 72 is configured to divide the data to be transmitted into a plurality of data blocks according to a preset data frame size, and send, by using the transceiver 71, the plurality of data blocks divided by the processor to each of the current lanes. a roadside equipment RSU; and determining, according to a maximum vehicle speed in the current lane, a number of data blocks that can be advertised by each of the RSUs, and generating an RSU allocation scheme of the plurality of data blocks according to the determination result, and according to the RSU The allocation scheme is used by the transceiver 71 to send a control command to the RSU to which the data block is allocated, where the control command is used to indicate a data block that needs to be broadcast by the RSU of the allocated data block;

 The transceiver 71 is configured to send the plurality of data blocks divided by the processor 72 to each RSU that covers the current lane; and send a control instruction to the RSU to which the data block is allocated.

 Further, the memory 73 can buffer the data blocks and/or control instructions that the transceiver 71 needs to transmit, and can also cache the intermediate data generated by the processor 72 during data processing.

 Specifically, the processor 72 may divide the data to be sent into N data blocks, where N is an integer greater than 1, wherein the size from the 1st to the N-1th data block is equal to a preset data frame size. The size of the Nth data block is equal to or smaller than the predetermined data frame size.

 The processor 72 may determine, according to the following formula, the number of data blocks that the i th RSU can advertise, M, i being an integer not less than 1:

 Ni = (Di / Vmax) / T;

 Where Di is the coverage distance of the i-th RSU, Vmax is the highest vehicle speed in the current lane, and T is the time required to broadcast one of the preset data frames.

 Specifically, when the processor 72 generates the RSU allocation scheme of the multiple data blocks according to the determination result, the following steps are specifically performed:

 A. It is determined that the total number of RSUs in the current lane is n, and the driving direction of the vehicle in the current lane is from SU1 to RSUn;

B. If the number of unallocated data blocks in the plurality of data blocks is not less than a, assigning the first a data blocks that are not allocated in the plurality of data blocks to the RSUj, if the multiple data The number of unallocated data blocks in the block is less than a, and all unallocated data blocks are allocated to RSUj; The value is 1, a is the number of data blocks that RSUj can advertise;

 C. If the unallocated data block of the plurality of data blocks is not 0, add j to 1, and return to step B.

 Specifically, the processor 72 may send, by using the transceiver, the control signaling that carries the start data block identifier and the termination data block identifier to the RSU to which the data block is allocated according to the RSU allocation scheme, where the start data block is sent. The identification indicates the first data block that the RSU needs to advertise, and the termination data block identifier indicates the last data block that the RSU needs to advertise.

 Further, the control signaling further carries at least one of the following information:

 An information identifier, used to identify information that needs to be broadcasted, where the information to be broadcasted includes multiple data blocks;

 Lane identification, used to identify the current lane;

 The advertisement start time, which is used to indicate the start time of the broadcast data block;

 The broadcast end time is used to indicate the end time of the broadcast data block.

 Based on the same technical concept, an embodiment of the present invention further provides an RSU applicable to the above process.

 Referring to Figure 8, the RSU can include a transceiver 81, a processor 82, and further a memory 83, wherein:

 The transceiver 81 is configured to receive a data block and a control command that are sent by the control device, where the data block is multiple, the multiple data blocks are obtained by dividing the data to be sent, and the control instruction indicates the RSU a data block to be advertised, the data block to be advertised is a data block in the plurality of data blocks;

 The processor 82 is configured to broadcast a data block to the in-vehicle device OBU through the transceiver according to the indication of the control instruction received by the transceiver.

 Further, the memory 83 can buffer the transceiver 81 to receive large data blocks and control instructions, and can also cache the intermediate data generated by the processor 82 during data processing.

The control command carries a control signaling of a start data block identifier and a termination data block identifier, where the start data block identifier indicates a first data block that the RSU needs to broadcast, and the termination data The block identifier indicates the last block of data that the RSU needs to advertise. Correspondingly, the processor 82 may search, in the plurality of data blocks, a start data block corresponding to the start data block identifier, a termination data block corresponding to the end data block identifier, and broadcast to the OBU through the transceiver 81. From the starting data block to the data block of the terminating data block.

 Specifically, the control signaling further carries at least one of the following information:

 An information identifier, used to identify information that needs to be broadcasted, where the information to be broadcasted includes multiple data blocks;

 Lane identification, used to identify the current lane;

 The advertisement start time, which is used to indicate the start time of the broadcast data block;

 The broadcast end time is used to indicate the end time of the broadcast data block.

 Further, the processor 82 is further configured to: if the transceiver 81 receives a plurality of control commands for different lanes that overlap in the broadcast time period, alternately broadcast the multiple control commands according to the time division manner in the overlapping time period. data block.

 Further, the transceiver 81 can also monitor the traveling speed information of the vehicle broadcasted by the OBU before receiving the control command sent by the control device, and report the traffic information report to the control device according to the monitored information according to the preset time interval. The information report carries the maximum travel speed of the vehicle within the coverage of the RSU.

 In summary, the beneficial effects of the present invention include:

 In the solution provided by the embodiment of the present invention, after the control device divides the data to be transmitted into multiple data blocks, the divided multiple data blocks are sent to the RSUs covering the current lane, and according to the data blocks that can be broadcast by each RSU. The RSU allocation scheme for generating a plurality of data blocks, and issuing a control instruction to the RSU of the allocated data block according to the RSU allocation scheme to indicate the data block that the RSU needs to broadcast, and the RSU broadcasts the data indicated by the control instruction to the OBU. Piece. It can be seen that the method implements a scheme in which multiple SUs jointly broadcast multiple data blocks of data to be sent, thereby solving the problem of how multiple RSUs in the vehicle network jointly send data packets.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It should be understood that the flow chart can be implemented by computer program instructions And/or a combination of the processes and/or blocks in the block diagrams, and the flowcharts and/or blocks in the flowcharts and/or block diagrams. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

 The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

 These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

 Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the < Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and modifications

 It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

 Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention is directed to a method, apparatus (system), and computer program according to an embodiment of the present invention. The flow chart and/or block diagram of the product is described. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

 The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

 These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

 Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the < Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and modifications

 It is apparent that those skilled in the art can make various modifications and changes to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims

Rights request 1. A data broadcast control method in the Internet of Vehicles, characterized in that the method includes: the control device divides the data to be sent into multiple data blocks according to the preset data frame size, and divides the multiple data blocks into Data blocks are sent to each roadside device RSU covering the current lane; The control device determines the number of data blocks that each RSU can broadcast based on the highest vehicle speed in the current lane, and generates an RSU allocation plan for the multiple data blocks based on the determination result; The control device issues a control instruction to the RSU to which the data block is allocated according to the RSU allocation plan, where the control instruction is used to indicate the data block that needs to be broadcast by the RSU to which the data block is allocated. 2. The method of claim 1, wherein the control device divides the data to be sent into multiple data blocks according to the size of the data frame, specifically including: The control device divides the data to be sent into N data blocks, where N is an integer greater than 1, where the size of the 1st to N-1th data blocks is equal to the preset data frame size, and the Nth data The block size is equal to or smaller than the preset data frame size. 3. The method of claim 2, wherein the control device determines the number of data blocks that each RSU can broadcast based on the highest vehicle speed in the current lane, specifically including: The control device determines the number M of data blocks that the first RSU can broadcast according to the following formula, where i is an integer not less than 1: Ni=(Di/Vmax)/T; Among them, Di is the coverage distance of the i-th RSU, Vmax is the maximum vehicle speed in the current lane, and T is the time required to broadcast a preset data frame. 4. The method of claim 1, wherein generating the RSU allocation plan for the plurality of data blocks according to the determination result specifically includes: A. Determine the total number of RSUs in the current lane as n, and the vehicle driving direction in the current lane is from RSU1 to RSUn; B. If the number of unallocated data blocks among the plurality of data blocks is not less than a, then allocate the first a unallocated data blocks among the plurality of data blocks to RSUj. If the number of unallocated data blocks among the plurality of data blocks is not included in the block If the number of allocated data blocks is less than a, all unallocated data blocks are allocated to RSUj; the initial value of j is 1, and a is the number of data blocks that RSUj can broadcast; C. If the unallocated data block among the multiple data blocks is not 0, add 1 to j and return to step B. 5. The method of claim 1, wherein the control device issues a control instruction to the RSU to which the data block is allocated according to the RSU allocation plan, and the control instruction is used to instruct the allocated data block. The data blocks that need to be broadcast by the RSU include: The control device sends control signaling carrying a start data block identifier and a termination data block identifier to the RSU to which the data block is allocated according to the RSU allocation plan. The start data block identifier indicates the first data block that the RSU needs to broadcast. , the termination data block identifier indicates the last data block that the RSU needs to broadcast. 6. The method of claim 5, wherein the control signaling also carries at least one of the following information: Information identifier, used to identify information that needs to be broadcast, and the information that needs to be broadcast contains multiple data blocks; Lane markings, used to identify the current lane; Advertisement start time, used to indicate the start time of broadcast data block; Advertisement end time, used to indicate the end time of the broadcast data block. 7. The method according to any one of claims 1 to 6, characterized in that, the maximum vehicle speed in the current lane is a preset maximum vehicle speed; or, the control device determines the maximum vehicle speed in the current lane according to the following method : The control device receives the traffic information report reported by each RSU, and each traffic information report carries the maximum driving speed of the vehicle within the coverage of the corresponding RSU; the control device selects the maximum value of the maximum driving speed of the vehicle in the received traffic information report, As the maximum speed in the current lane. 8. A data broadcasting method in the Internet of Vehicles, characterized in that the method includes: the roadside device RSU receives data blocks issued by the control device, the data blocks are multiple, and the multiple data blocks are processed by Obtained after splitting the sent data; The RSU receives a control instruction issued by a control device, and the control instruction indicates the data block that the RSU needs to broadcast, and the data block that needs to be broadcast is a data block among the plurality of data blocks; the RSU is based on The instruction of the control instruction broadcasts the data block to the on-board equipment OBU. 9. The method of claim 8, wherein the control instruction carries a start data block identifier and a termination data block identifier, and the start data block identifier indicates the first data block that the RSU needs to broadcast, The termination data block identifier indicates the last data block that the RSU needs to broadcast; The RSU broadcasts the data block to the OBU according to the instruction of the control instruction, which specifically includes: the RSU searches the plurality of data blocks for the start data block corresponding to the start data block identifier and the termination data. The block identifies the corresponding termination data block, and broadcasts the data blocks from the start data block to the termination data block to the OBU. 10. The method of claim 9, wherein the control signaling also carries at least one of the following information: Information identifier, used to identify information that needs to be broadcast, and the information that needs to be broadcast contains multiple data blocks; Lane markings, used to identify the current lane; Advertisement start time, used to indicate the start time of broadcast data block; Advertisement end time, used to indicate the end time of the broadcast data block. 11. The method of claim 10, wherein if the RSU receives multiple control instructions for different lanes with overlapping broadcast time periods, the RSU uses a time division method to alternately broadcast multiple control instructions within the overlapping time periods. The data block indicated by the instruction. 12. The method of claim 11, wherein the RSU uses a time division method to alternately broadcast the data blocks indicated by multiple control instructions within the overlapping time period, including: The RSU determines the number of lanes that meet the broadcast conditions within the broadcast time period; If the number of lanes that meet the broadcast conditions within the broadcast time period is k, then the broadcast time period is divided into k time segments, and the length of each time segment ensures that at least one frame of data is played; where k is greater than 1. integer; The RSU plays the control instruction of the i-th lane among the k lanes in the i-th time segment; where, l < ik, different lanes correspond to different control instructions. 13. The method according to any one of claims 8-12, characterized in that, before the RSU receives the control instruction issued by the control device, it further includes: The SU monitors the vehicle driving speed information broadcast by the OBU, and reports traffic information reports to the control device at preset time intervals based on the monitored information. The traffic information report carries the maximum driving speed of the vehicles within the coverage of the RSU. 14. A control device, characterized in that the device includes: The data block sending unit is used to divide the data to be sent into multiple data blocks according to the preset data frame size, and send the divided multiple data blocks to each roadside equipment RSU covering the current lane; Allocation plan generation unit, used to determine the number of data blocks that each RSU can broadcast based on the highest vehicle speed in the current lane, and generate RSU allocation plans for the multiple data blocks based on the determination results; Control instruction sending unit, used to determine the number of data blocks that can be broadcast by each RSU according to the determination result; The above-mentioned RSU allocation plan issues a control instruction to the RSU to which the data block is allocated to indicate the data block that the RSU needs to broadcast. 15. The device according to claim 14, wherein the data block sending unit is used to divide the data to be sent into multiple data blocks according to the following method: Divide the data to be sent into N data blocks, where N is an integer greater than 1, where the size from the 1st to the N-1th data block is equal to the preset data frame size, and the size of the Nth data block The size is equal to or less than the data frame size. 16. The device according to claim 15, characterized in that the allocation plan generating unit is used for: Determine the number of data blocks Ni that the first RSU can broadcast according to the following formula, where i is an integer not less than 1: M=(Di/Vmax)/T; Among them, Di is the coverage distance of the i-th RSU, Vmax is the maximum vehicle speed in the current lane, and T is the time required to broadcast a data frame. 17. The device according to claim 14, wherein the allocation plan generating unit is configured to: generate the RSU allocation plan for the plurality of data blocks according to the following method: A. Determine the total number of RSUs in the current lane as n, and the vehicle driving direction in the current lane is from RSU1 to RSUn; B. If the number of unallocated data blocks among the multiple data blocks is not less than a, then allocate the first a unallocated data blocks among the multiple data blocks to RSUj, otherwise, all unallocated data blocks will be allocated to RSUj. The allocated data blocks are allocated to RSUj; the initial value of j is 1, and a is the number of data blocks that RSUj can broadcast; C. If the unallocated data block among the multiple data blocks is not 0, add 1 to j and return to step B. 18. The device according to claim 14, characterized in that the control instruction sending unit is used for: According to the RSU allocation scheme, control signaling carrying the start data block identifier and the end data block identifier is issued to the RSU to which the data block is allocated; wherein, The starting data block identifier indicates the first data block that the RSU needs to broadcast, and the end data block identifier indicates the last data block that the RSU needs to broadcast. 19. The device according to claim 18, wherein the control signaling also carries at least one of the following information: Information identifier, used to identify information that needs to be broadcast, and the information that needs to be broadcast contains multiple data blocks; Lane markings, used to identify the current lane; Advertisement start time, used to indicate the start time of broadcast data block; Advertisement end time, used to indicate the end time of the broadcast data block. 20. The device according to any one of claims 14-19, characterized in that the allocation plan generating unit is used for: Determine the preset maximum speed as the maximum speed in the current lane; or, Receive the traffic information report reported by each RSU. Each traffic information report carries the maximum driving speed of the vehicle within the coverage of the corresponding RSU; select the maximum speed of the vehicle in each received traffic information report. The maximum value of the driving speed is used as the maximum speed in the current lane. 21. A roadside equipment RSU, characterized in that the equipment includes: The data block receiving unit is used to receive multiple data blocks issued by the control device after dividing the data to be sent; The control instruction receiving unit is used to receive the control instruction issued by the control device. The control instruction indicates the data block that needs to be broadcast by the RSU; A data block broadcast unit is used to broadcast data blocks to the vehicle-mounted equipment OBU according to the instructions of the control instruction. 22. The device according to claim 21, wherein the control instruction carries control signaling of a start data block identifier and a termination data block identifier; wherein, the start data block identifier indicates that the RSU needs to be broadcast The first data block, the termination data block identifier indicates the last data block that the RSU needs to broadcast; The data block broadcasting unit is configured to: search for the starting data block corresponding to the starting data block identifier and the ending data block corresponding to the ending data block identifier in the plurality of data blocks; and broadcast the slave data to the OBU. The data blocks from the start data block to the end data block. 23. The device according to claim 22, wherein the control signaling also carries at least one of the following information: Information identifier, used to identify information that needs to be broadcast, and the information that needs to be broadcast contains multiple data blocks; Lane markings, used to identify the current lane; Advertisement start time, used to indicate the start time of broadcast data block; Advertisement end time, used to indicate the end time of the broadcast data block. 24. The device of claim 23, wherein the data block broadcasting unit is configured to: if the control instruction receiving unit receives multiple control instructions for different lanes with overlapping broadcast time periods, the RSU The data blocks indicated by multiple control instructions are broadcast alternately in a time division manner within the overlapping time period. 25. The device according to any one of claims 21 to 24, characterized in that, the device further includes: The traffic report reporting unit is used to monitor the vehicle speed information broadcast by the OBU, and report traffic information reports to the control device at preset time intervals based on the monitored information. The traffic information report carries the maximum number of vehicles within the coverage of the RSU. Driving speed. 26. A control device, characterized by including: A processor, configured to divide the data to be sent into multiple data blocks according to the preset data frame size, and send the multiple data blocks divided by the processor to each road covering the current lane through the transceiver. Edge device RSU; and, determine the number of data blocks that each RSU can broadcast based on the highest vehicle speed in the current lane, and generate an RSU allocation plan for the multiple data blocks based on the determination result, and based on the RSU allocation plan , issue a control instruction to the RSU to which the data block is allocated through the transceiver, where the control instruction is used to indicate the data block that needs to be broadcast by the RSU to which the data block is allocated; The transceiver is configured to send multiple data blocks divided by the processor to each RSU covering the current lane; and, issue control instructions to the RSU to which the data blocks are allocated. 27. The control device according to claim 26, wherein the processor is specifically configured to divide the data to be sent into N data blocks, where N is an integer greater than 1, wherein, from the 1st to The size of the N-1th data block is equal to the preset data frame size, and the size of the Nth data block is equal to or smaller than the preset data frame size. 28. The controller according to claim 27, wherein the processor is specifically configured to determine the number Ni of data blocks that the i-th RSU can broadcast according to the following formula, where i is an integer not less than 1: Ni=(Di/Vmax)/T; Among them, Di is the coverage distance of the i-th RSU, Vmax is the maximum vehicle speed in the current lane, and T is the time required to broadcast a preset data frame. 29. The control device according to claim 27, wherein when the processor generates the RSU allocation plan for the multiple data blocks according to the determination result, the processor specifically performs the following steps: A. Determine the total number of RSUs in the current lane as n, and the vehicle driving direction in the current lane is from RSU1 to RSUn; B. If the number of unallocated data blocks among the plurality of data blocks is not less than a, then allocate the first a unallocated data blocks among the plurality of data blocks to RSUj. If the number of unallocated data blocks among the plurality of data blocks is The number of unallocated data blocks in the block is less than a, all unallocated data blocks are allocated to RSUj; the initial value of j is 1, and a is the number of data blocks that RSUj can broadcast; C. If the unallocated data block among the multiple data blocks is not 0, add 1 to j and return to step B. 30. The control device according to claim 26, wherein the processor is specifically configured to: according to the RSU allocation scheme, send the starting data block to the RSU to which the data block is allocated through the transceiver. Control signaling that identifies and terminates the data block identifier. The start data block identifier indicates the first data block that the RSU needs to broadcast. The termination data block identifier indicates the last data block that the RSU needs to broadcast. 31. The control device according to claim 30, characterized in that the control signaling also carries at least one of the following information: Information identifier, used to identify information that needs to be broadcast, and the information that needs to be broadcast contains multiple data blocks; Lane markings, used to identify the current lane; Advertising start time, used to indicate the starting time of advertising data blocks; Advertisement end time, used to indicate the end time of the broadcast data block. 32. A roadside equipment RSU, characterized by including: A transceiver, configured to receive data blocks and control instructions issued by the control device. The data blocks are multiple. The multiple data blocks are obtained by dividing the data to be sent. The control instructions indicate that the RSU A data block that needs to be broadcast, where the data block that needs to be broadcast is a data block among the plurality of data blocks; A processor, configured to broadcast the data block to the vehicle-mounted device OBU through the transceiver according to the instruction of the control instruction received by the transceiver. 33. The RSU of claim 32, wherein the control instruction carries control signaling of a start data block identifier and a termination data block identifier, and the start data block identifier indicates that the RSU needs The first data block to be broadcast, the termination data block identifier indicates the last data block that the RSU needs to broadcast; The processor is specifically configured to search the plurality of data blocks for a start data block corresponding to the start data block identifier and a termination data block corresponding to the end data block identifier, and send the data to the processor through the transceiver. The OBU broadcasts data blocks from the starting data block to the ending data block. 34. The RSU of claim 33, wherein the control signaling also carries at least one of the following information: Information identifier, used to identify information that needs to be broadcast, and the information that needs to be broadcast contains multiple data blocks; Lane markings, used to identify the current lane; Advertisement start time, used to indicate the start time of broadcast data block; Advertisement end time, used to indicate the end time of the broadcast data block. 35. The RSU according to claim 34, wherein the processor is further configured to: if the transceiver receives multiple control instructions for different lanes whose broadcast time periods overlap, then during the overlapping time period, A time division method is used to alternately broadcast the data blocks indicated by multiple control instructions. 36. The RSU according to any one of claims 32 to 35, characterized in that the transceiver is also used to monitor the vehicle driving speed information broadcast by the OBU before receiving the control instructions issued by the control device. According to the monitoring The received information reports a traffic information report to the control device at preset time intervals. The traffic information report carries the maximum driving speed of the vehicle within the coverage of the RSU.